JP2009029792A - Method and apparatus for producing residual active chlorine-containing water for sterilization - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method, whereby such a weakly acidic and sterilizing power-having solution having a residual active chlorine concentration suppressing generation of trihalomethane suggested as a cause of cancer, is enabled to use with an easy operation like use of tap water. <P>SOLUTION: The method of producing the residual active chlorine-containing water for sterilization comprises a process of producing a diluted aqueous solution having 10-150 ppm residual active chlorine concentration by diluting a concentrated residual active chlorine-containing aqueous solution having 2,000-10,000 ppm residual active chlorine concentration and pH of 10.5±1.5, and a process of controlling pH of the diluted aqueous solution so as to become 6±2 by adding at most 30 wt.% concentration of an acidic additive to the running diluted aqueous solution. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is, for example, in the sterilization and disinfection of ingredients and kitchen utensils of users who have individual small kitchens in small-scale stores and fast food restaurants that occupy the majority of restaurants, hand sterilization as a countermeasure for hospital hospital infection, nursing care facilities, etc. The present invention relates to a method and an apparatus for producing residual effective chlorine-containing water for sterilization used for sterilization for controlling environmental bacteria.

  In food processing sites, about 200 ppm of sodium hypochlorite (soda) -containing water that guarantees the bactericidal effect is used for sterilization. As sodium hypochlorite-containing water, 50,000 to 60,000 ppm high-concentration sodium hypochlorite-containing water produced in factories is distributed in the market as a food additive. Therefore, in the field of food processing, tap water is added to the high-concentration sodium hypochlorite-containing water and diluted to a concentration of about 200 ppm to obtain sterilizing water for sterilization. Such sterilizing water is disclosed, for example, in Patent Document 1, and is used to sterilize vegetables by immersing them or immersing them.

  However, in general, sodium hypochlorite used in this sterilization application has a strong alkalinity, so the employees' hands are rough, and pathogens collect there, causing food poisoning to be transmitted from the cook. It had been. In addition, there has been a problem that the smell of residual sodium hypochlorite remains in food.

  Further, when water containing about 200 ppm of sodium hypochlorite is used, there is also a problem that trihalomethane is generated due to a reaction between residual effective chlorine and food organic matter. Trihalomethane has been pointed out to be carcinogenic, and there are concerns about health damage to consumers.

  In addition, since the handling of sodium hypochlorite and hydrochloric acid is troublesome and dangerous in the majority of small-scale restaurants and the like, in general cooking places, washing is often performed only with water washing. As described above, there are usually safety and food hygiene problems such as washing hands of chefs and employees, and a solution is awaited.

  In hospitals and nursing homes, sterilization of fingers is mainly performed with drugs, but there are problems with rough skin caused by drugs.

  On the other hand, a device for generating sterilizing water having a residual effective chlorine concentration of 30 ppm or less has been developed at the site of use by electrolyzing salt, and such a device has been installed in a cooking chamber or the like. . However, small-scale food-related stores have problems in handling equipment and costs, and cannot be a fundamental solution.

  Recently, in order to solve these problems, a high-concentration electrolytic hypochlorous acid aqueous solution managed in a factory is manufactured, poured into a small pack of about 20 liters, and diluted at a general cooking site. Attempts have been made to provide a system that can be used for the above (Patent Document 2). In this method, when the quality of the hypochlorous acid aqueous solution is stably supplied while maintaining a certain period, the concentration guarantee of weakly acidic high-concentration hypochlorous acid water is 2000 ppm. Further, a side reaction occurs within a storage period of one month, resulting in a decrease in concentration. For this reason, the transportation cost is high and it cannot be put on a general distribution system.

In FIG. 1, the schematic diagram of the relationship between the presence form of hypochlorous acid containing water (residual effective chlorine aqueous solution) and pH is shown. As shown in FIG. 1, the hypochlorous acid-containing water has a weak sterilizing power at a pH of 8 or higher because residual effective chlorine is in the form of ClO ⁻ . It has already been found that sterilization with these chlorine compounds is sterilization with hypochlorous acid HClO, and the sterilization effect increases by bringing the pH close to neutrality. However, it is difficult to lower the pH to 8 or less simply by diluting sodium hypochlorite with water.

Therefore, in a major food factory, after diluting sodium hypochlorite in the container, neutralize it by gently adding dilute hydrochloric acid and gently stirring to increase the bactericidal effect by making the pH acidic and enhancing the bactericidal effect. Used as water. However, when this method is used, the residual effective chlorine concentration of the solution once caused to react in the container is rapidly reduced due to a side reaction in the solution. Therefore, when one day or more passes, the sterilizing ability is greatly reduced, and it is difficult to obtain the necessary amount in a timely manner. In addition, there is a disadvantage that it cannot be used in places where there are no skilled technicians such as major food factories due to the danger of handling chemicals.
Japanese Patent Publication No. 7-8768 JP 2000-5756 A

  For small-scale establishments where it is difficult for specialist engineers to secure residual effective chlorine-containing water for sterilization, increase the marketability by reducing transportation costs and extending the storage period, such as general restaurants and fast food restaurants To provide residual effective chlorine-containing water for sterilization that has a predetermined concentration and a predetermined pH at a low cost that facilitates hygienic management of environmental bacteria control such as food and fingers easily and reliably even by part-time workers. With the goal. That is, the present invention provides a residual effective chlorine-containing water having a predetermined concentration of residual effective chlorine that can also suppress the occurrence of trihalomethane, which has been pointed out as carcinogenic, and having a predetermined pH. An object of the present invention is to provide an apparatus and a method that can be used with a simple operation such as using tap water. Another object of the present invention is to reduce transportation costs by using a high concentration residual effective chlorine aqueous solution as a raw material.

  In the present specification, an aqueous solution such as hypochlorous acid-containing water, sodium hypochlorite-containing water, or a mixture thereof is referred to as “residual effective chlorine aqueous solution”. Further, a residual effective chlorine aqueous solution having a predetermined concentration and a predetermined pH and having a sterilizing ability is referred to as “residual effective chlorine-containing water”.

  That is, the present invention provides a residual residual chlorine concentration by diluting a high-concentration residual effective chlorine aqueous solution having a residual effective chlorine concentration of 2000 ppm to 6000 ppm or 2000 ppm to 10,000 ppm and a pH of 10.5 ± 1.5 with water. A process for producing a diluted aqueous solution having an effective chlorine concentration of 10 ppm to 150 ppm, and an acidic additive having a concentration of 30% by weight or less is added to running water of the diluted aqueous solution, and the pH of the diluted aqueous solution is adjusted to 6 ± 2. And a process for producing residual effective chlorine-containing water for sterilization.

  Preferably, in the method for producing residual effective chlorine-containing water, the addition of the acidic additive is performed on the stream of accelerated diluted aqueous solution.

  Moreover, it is preferable that the acidic additive contains at least any one selected from vinegar, hydrochloric acid having a concentration of 20% by weight or less, and acetic acid having a concentration of 20% by weight or less.

  Preferably, the residual effective chlorine-containing water is a method for producing residual effective chlorine-containing water, wherein the high-concentration residual effective chlorine aqueous solution is a hypochlorous acid aqueous solution, a sodium hypochlorite aqueous solution, or a mixed aqueous solution thereof.

  Preferably, the high-concentration residual effective chlorine aqueous solution is a sodium hypochlorite aqueous solution having a residual effective chlorine concentration of 50,000 to 60000 ppm added at a ratio of 2 to 10% by volume with respect to 100% by volume of the hypochlorous acid aqueous solution. A high-concentration residual effective chlorine aqueous solution mixed and adjusted to have a pH of 10.5 ± 1.5, and a hypochlorous acid aqueous solution comprising an anode chamber having an anode electrode, an anode chamber, Using an electrolytic apparatus having a cathode chamber separated by a diaphragm, an aqueous solution containing chloride and hydrochloric acid of 10% by weight or less based on chloride is introduced into the anode chamber and the cathode chamber, and the anode electrode And a method for producing residual effective chlorine-containing water which is an aqueous solution of electrolytic hypochlorous acid generated in the anode chamber by applying a voltage to the cathode electrode.

  Preferably, the addition of the acidic additive to the running water of the diluted aqueous solution is arranged at the drip storage tube having a storage space for drip and storing the acidic additive, and at the upper end of the drip storage tube, and one end is Arranged inside the storage space, the other end is fluidly connected to the acidic additive introduction amount regulator, a drip pipe whose inner diameter is smaller than the inner diameter of the drip storage pipe, and one end arranged at the lower end of the drip storage pipe The other end is fluidly connected to the acidic additive introduction tube and the inner diameter is smaller than the inner diameter of the drip storage tube. Residual effective chlorine that adjusts the amount of acid additive added by adjusting the amount of dripping from the drip tube of the drip acidic additive temporary reservoir to the storage space by adjusting the additive introduction amount regulator It is a manufacturing method of contained water .

  Preferably, the addition of the acidic additive to the running water of the diluted aqueous solution has a liquid inlet at one end and is fluidly connected to the acidic additive introduction amount regulator and the drip acidic additive temporary reservoir at the other end. This is a residual effective chlorine-containing water production apparatus, which is further used with a tilted tube having a liquid discharge port and attached so that the liquid introduction port is positioned higher than the liquid discharge port.

  Moreover, Preferably, it is a manufacturing method of the residual effective chlorine containing water which two drip acidic additive temporary storages connected in series.

  Preferably, the acidic additive flows in a path in which the discharge pipe of the drip acidic additive temporary reservoir and the acidic additive addition part are fluidly connected via the acidic additive introduction pipe, By adding a gentle negative pressure to the static fluid, the acid added from the drip acid additive temporary reservoir through the acid additive introduction pipe according to the water drop weight in the drip acid additive temporary reservoir In order to accurately add the acidic additive introduced into the additive addition unit to the pressurized diluted aqueous solution in flowing water, the drip drop distance in the gas-tight acidic additive temporary reservoir is 1 The pressure within the acidic additive introduction pipe is controlled by securing to ˜100 cm, and when the acidic additive in the drip acidic additive temporary reservoir is instilled, the acidic additive is accurately dropped one by one in the diluted aqueous solution. Do the addition and point The addition of the acidic additive to a dilute aqueous solution and stops stops, a method for producing a residual available chlorine-containing water.

  Preferably, the acidic additive storage bottle fluidly connected to the acidic additive introduction amount regulator has a warning device that issues a warning based on information from the acidic additive residual amount sensor, and the acidic additive storage bottle This is a method for producing residual effective chlorine-containing water in which a warning is issued from a warning device when the volume of the acidic additive is reduced to one fifth of the volume of the acidic additive storage bottle.

  Preferably, the pipe that fluidly connects the water inlet for introducing water and the dilution part has a faucet on-off valve, and the water pressure is applied to the pipe that fluidly connects the faucet on-off valve and the dilution part. It has a water pressure detection mechanism to detect, and the water pressure detection mechanism has a water pressure automatic opening and closing valve that automatically opens and closes according to the water pressure in the pipe that fluidly connects the acid additive introduction amount regulator and the acid additive storage bottle However, when a change in water pressure is detected when the faucet on / off valve is opened from the closed position, the water pressure automatic on / off valve is opened to allow passage of the acidic additive, and when the faucet on / off valve is opened to closed. This is a method for producing residual effective chlorine-containing water that makes it impossible for the acidic additive to pass by closing the automatic water pressure on / off valve when a change in water pressure is detected.

  Further, the present invention has a water introduction port for introducing water and a downstream side of the water introduction port, has a high concentration residual effective chlorine aqueous solution introduction port, and is introduced from the high concentration residual effective chlorine aqueous solution introduction port. A diluting unit that dilutes a high concentration residual effective chlorine aqueous solution with water to generate a diluted aqueous solution, a high concentration residual effective chlorine aqueous solution introduction amount controller that is fluidly connected to the high concentration residual effective chlorine aqueous solution inlet, and a dilution unit An acidic additive addition part for adding an acidic additive, and a downstream of the acidic additive addition part, mixed with a dilute aqueous solution and an acidic additive, and contains residual effective chlorine-containing water. A device for producing residual effective chlorine-containing water for sterilization, comprising: an acidic additive mixing unit for obtaining a water content; and an acidic additive introduction amount regulator fluidly connected to the acidic additive introduction port by an acidic additive introduction pipe . In addition, this residual effective chlorine containing water manufacturing apparatus contains an acidic additive introduction amount adjustment part, and an acidic additive introduction amount adjustment part contains an acidic additive introduction amount regulator.

  Preferably, a water flow rectification unit having a water flow stabilization mechanism for rectifying the water flow of the diluted aqueous solution is further disposed between the dilution unit and the acidic additive addition unit, and the acidic additive addition unit is acidic addition A dilute aqueous solution injection pipe having a dilute aqueous solution injection port for injecting the dilute aqueous solution into the agent addition portion, and an acidic additive defined by a surface having at least a part of the outer wall of the dilute aqueous solution injection tube and having the dilute aqueous solution injection port It is a residual effective chlorine containing water manufacturing apparatus containing the acidic additive residence space which has an inlet.

  Preferably, the water flow rectifier has a water flow stabilization mechanism for stabilizing the water flow inside thereof, and is a residual effective chlorine-containing water production apparatus.

  Preferably, the acidic additive introduction amount adjusting unit further includes at least one drip acidic additive temporary reservoir, and the drip acidic additive temporary reservoir has a storage space for storing the acidic additive. It is arranged at the upper end of the storage tube and the drip storage tube, one end is arranged inside the storage space, the other end is fluidly connected to the acidic additive introduction amount regulator, and the inner diameter is the drip storage tube. A drip pipe having a smaller inner diameter, one end disposed at the lower end of the drip storage pipe, the other end fluidly connected to the acidic additive introduction pipe, and a discharge pipe having an inner diameter smaller than the inner diameter of the drip storage pipe This is a device for producing residual effective chlorine-containing water. The drip acidic additive temporary storage device is included in the acidic additive introduction amount adjusting unit.

  Preferably, the acidic additive introduction amount adjusting unit further includes a tilting tube, the tilting tube has a liquid inlet at one end, and an acidic additive introduction amount regulator and drip acid at the other end. It is a residual effective chlorine containing water manufacturing apparatus which has a liquid discharge port fluidly connected to the additive temporary storage device, and is attached so that the liquid introduction port is positioned higher than the liquid discharge port.

  Moreover, Preferably, it is a residual effective chlorine containing water manufacturing apparatus which is a drip acidic additive temporary storage device connected in series by two drip acidic additive temporary storage devices. That is, it is a residual effective chlorine containing water manufacturing apparatus containing the drip acidic additive temporary storage device which the acidic additive introduction amount adjustment part connected two in series. Further, preferably, the drip acidic additive temporary storage device is a visual addition amount measuring device and an addition warning device for informing the user of the addition amount of the acidic additive by the number of infusions and the presence or absence of mixing. This is a device for producing residual effective chlorine-containing water.

  Preferably, the acidic additive storage bottle has a warning device that issues a warning based on information from the acidic additive remaining amount sensor, and the acidic additive storage bottle has a volume of the acidic additive storage bottle. It is a residual effective chlorine containing water manufacturing apparatus which further has a mechanism which issues a warning from a warning device, when it reduces to 1/5 of the volume of this. The acidic additive storage bottle is included in the acidic additive introduction amount adjusting unit.

  Preferably, the residual effective chlorine-containing water production apparatus includes a high-concentration residual effective chlorine aqueous solution storage tank fluidly connected to the high-concentration residual effective chlorine aqueous solution introduction amount regulator, Concentration residual effective chlorine aqueous solution residual amount sensor, and the residual effective chlorine containing water production device has a raw water warning device that issues a warning based on the information from the high concentration residual effective chlorine aqueous solution residual amount sensor. A warning device for water issues a warning mechanism when the volume of high-concentration residual effective chlorine aqueous solution storage tank is reduced to one fifth of the volume of high-concentration residual effective chlorine aqueous solution storage tank. It has a residual effective chlorine-containing water production apparatus.

  Preferably, a water pressure detection mechanism that has a faucet on-off valve between the water introduction port for introducing water and the diluting unit and detects the water pressure between the faucet on-off valve and the diluting unit is provided. A pipe that fluidly connects the acidic additive introduction amount regulator and the acidic additive storage bottle, and has a water pressure automatic open / close valve that automatically opens and closes according to the water pressure. When a change in water pressure is detected when the valve is opened from the closed position, the water pressure automatic open / close valve opens to allow the passage of acidic additives, and a change in water pressure is detected when the faucet open / close valve is opened to closed. In this case, the residual effective chlorine-containing water producing apparatus further includes a mechanism that makes it impossible for the acidic additive to pass by closing the water pressure automatic open / close valve.

  Preferably, the residual effective chlorine-containing water production apparatus includes a high-concentration residual effective chlorine aqueous solution storage tank that is fluidly connected to the high-concentration residual effective chlorine aqueous solution introduction amount regulator, and a water inlet and dilution for introducing water A pipe that connects the fluid to the pipe has a faucet on-off valve, a water pressure detection mechanism that detects the water pressure between the faucet on-off valve and the dilution part, and a high-concentration residual effective chlorine aqueous solution introduction amount regulator And a high-concentration residual effective aqueous chlorine solution storage tank that has a water pressure automatic open / close valve that automatically opens and closes according to the water pressure. The water pressure detection mechanism closes the faucet open / close valve. When a change in water pressure is detected when the valve is opened, the water pressure automatic open / close valve for raw water is opened to allow the passage of high-concentration residual effective chlorine aqueous solution, and the water pressure change when the faucet open / close valve is opened to closed. If this is detected, the water pressure automatic open / close valve for the raw water will close. In further comprising a mechanism to disable the passage of high density residual available chlorine solution, the residual available chlorine-containing water production apparatus.

  With the apparatus and method of the present invention, residual effective chlorine-containing water (hypochlorous acid-containing water) having a predetermined concentration and having a predetermined pH and having a predetermined pH is used in a simple operation such as using tap water. Devices and methods can be provided. In addition, by setting a predetermined residual effective chlorine concentration, generation of trihalomethane, which has been pointed out as carcinogenic, can be suppressed. Further, by using a high concentration residual effective chlorine aqueous solution as a raw material, the transportation cost can be reduced.

FIG. 1 shows the ratio of the existing form of chlorine to the hydrogen ion concentration (pH) of the residual effective chlorine aqueous solution (water containing hypochlorous acid). As is apparent from this figure, the form of chlorine varies depending on the pH, and as the pH increases, chlorine gas (Cl ₂ ), hypochlorous acid (HClO), hypochlorite ions ( It is known that the residual effective chlorine aqueous solution in the form of ClO ⁻ ) has a high bactericidal effect when the hydrogen ion concentration is pH 6 ± 2 centering on the weakly acidic region.

  The inventor has invented a method and apparatus for easily obtaining sterilized water having a high sterilizing effect, and is capable of stabilizing a residual effective chlorine aqueous solution having a high residual effective chlorine concentration of about 2000 ppm to 6000 ppm or 2000 ppm to 10000 ppm. Regarding sex, the following points were clarified. In addition, unless otherwise indicated, the ratio (% and ppm) shown in this specification indicates a weight ratio (% by weight and ppm by weight).

  That is, when the time-dependent change of the residual effective chlorine concentration of the residual effective chlorine aqueous solution was measured, it was clarified that the residual effective chlorine concentration was not stable at pH 6 ± 2 centering on the weakly acidic region and decreased with time. Therefore, at such a pH, it is difficult to store the residual effective chlorine aqueous solution for a long period of time and use it for sterilization. When the change in residual effective chlorine concentration over time when the pH of the residual effective chlorine aqueous solution was raised to 10.5 ± 1.5 was measured, both pH and concentration were stabilized over time in this pH range. Made it clear that

  Therefore, it is necessary to store high-concentration residual effective chlorine aqueous solution at a pH of around 10.5 ± 1.5, where the residual effective chlorine concentration of the residual effective chlorine aqueous solution is stable over time, and to have sterilizing water (water containing residual effective chlorine) It was found that residual effective chlorine-containing water for sterilization can be easily obtained by diluting to a concentration of 10 ppm to 150 ppm and converting the pH to 6 ± 2 Invented.

  According to the present invention, it is possible to produce the amount of residual effective chlorine-containing water for sterilization that is required by the user in a timely manner according to the amount used at the site of use, so that the workability is similar to that using tap water. Cleaning and sterilization of foods can be performed. By using the method and apparatus of the present invention, a high concentration residual effective chlorine aqueous solution can be mass-produced in a factory, and since it is high concentration, its volume is small and its delivery is easy, so it can reduce manufacturing cost and distribution cost. It also has the advantage of being able to.

  As sodium hypochlorite-containing water, 50,000 to 60,000 ppm high-concentration sodium hypochlorite-containing water produced in factories is distributed in the market as a food additive. Conventionally, it has been difficult to convert the pH of sodium hypochlorite-containing water into a pH range of 6 ± 2 having sterilizing power. Also, handling high concentrations of sodium hypochlorite-containing water is dangerous for ordinary workers who have little chemical knowledge. Therefore, in the method and apparatus of the present invention, the high concentration residual effective chlorine aqueous solution is diluted so that the residual effective chlorine concentration is 2000 ppm to 6000 ppm or 2000 ppm to 10000 ppm, and a predetermined amount of a predetermined weak acid is added to dilute. Basically, a method of changing the pH of the aqueous solution to 6 ± 2 is used.

  Hereinafter, the present invention will be described in detail.

  The method for producing residual effective chlorine-containing water of the present invention includes a step of producing a diluted aqueous solution by diluting high-concentration residual effective chlorine-containing water as a raw material with water. The residual effective chlorine concentration of the high-concentration residual effective chlorine-containing water used as a raw material is 2000 ppm to 6000 ppm or 2000 ppm to 10000 ppm, and the pH is 10.5 ± 1.5. When the pH is within this range, the high residual residual chlorine concentration is stable over time, and can be stored for a long period of time. The water used for dilution can be any kind of water having a certain level of purity, such as tap water, pure water, ion-exchanged water, etc., but it is inexpensive and easily available. Therefore, tap water is preferable. The residual effective chlorine-containing water is diluted with water so that the residual effective chlorine concentration is 10 ppm to 150 ppm. When the residual effective chlorine concentration is around 200 ppm, there is a possibility that trihalomethane, which has been pointed out to be carcinogenic, is caused by a reaction between residual effective chlorine and organic substances in foods. In order to avoid this, the upper limit is 150 ppm, preferably Is 100 ppm. Moreover, in order to have sterilizing ability, it is necessary to have a residual effective chlorine concentration of 10 ppm or more, preferably 20 ppm or more. A more preferable range of residual effective chlorine concentration is specifically 30 ppm to 90 ppm.

  The lower limit of the residual effective chlorine concentration of the high-concentration residual effective chlorine-containing water used as a raw material is preferably 2000 ppm, and more preferably 2500 ppm, since the transportation cost increases if the concentration is too low. Further, the upper limit of the concentration is preferably 10000 ppm, preferably 6000 ppm, because when the residual effective chlorine-containing water is diluted, if the concentration is too high, it is difficult to ensure the concentration adjusting function. It is more preferable. The above points are comprehensively judged, and the residual effective chlorine concentration of the high-concentration residual effective chlorine-containing water used as a raw material is preferably 2000 ppm to 10000 ppm, more preferably 2000 ppm to 6000 ppm, and 2500 ppm to 6000 ppm. More preferably.

  Next, in the method of the present invention, an acidic additive is added to the diluted aqueous solution (diluted aqueous solution), and the pH of the diluted aqueous solution is adjusted to 6 ± 2, preferably 6 ± 1.5. Have The acidic additive can be added by adjusting the introduction amount of the acidic additive so that the pH of the diluted aqueous solution becomes a predetermined value.

  In the method for producing residual effective chlorine-containing water of the present invention, the acidic additive added to the diluted aqueous solution is selected from vinegar, hydrochloric acid and acetic acid, and it is preferable to use at least one of these. Vinegar contains 2-3% of acetic acid and can be used as an acidic additive without dilution. “Vinegar” can be one described in “Vinegar Quality Display Standard” (December 19, 2000, Ministry of Agriculture, Forestry and Fisheries Notification No. 1668). The concentration of the acidic additive of hydrochloric acid and acetic acid is 20% by weight or less, preferably 10% by weight or less. If the acid concentration is low, even an unskilled person can easily handle it. Such an acidic additive is added to running water of the diluted aqueous solution so as to have a predetermined pH. When the diluted aqueous solution has such a pH, the amount of the acidic additive added is 2% or less, or 1% with respect to the flow rate of the diluted aqueous solution (volume passing through a section in the flow per unit time). Hereinafter, the flow rate is generally 0.5% or less.

  After adding the acidic additive to the diluted aqueous solution, both are mixed in order to quickly adjust the pH of the diluted aqueous solution.

  The addition of the acidic additive is particularly preferable when it is performed on the accelerated running water of the diluted aqueous solution because the pH of the diluted aqueous solution can be adjusted to 6 ± 2 quickly and efficiently. The inventor has found that a weak alkaline water can be converted into an aqueous solution having a pH of 6 ± 2 in a short time (instantly) by mixing a small amount of an acidic additive with dynamic flowing water. It was used.

  As the high-concentration residual effective chlorine aqueous solution as a raw material, a hypochlorous acid aqueous solution, a sodium hypochlorite aqueous solution having a predetermined concentration, that is, 2000 ppm to 6000 ppm or 2000 ppm to 10000 ppm, or an aqueous solution obtained by mixing these can be used. The raw material aqueous solution is a sodium hypochlorite aqueous solution having a concentration of 50,000 to 60,000 ppm added at a ratio of 2 to 10% by volume with respect to 100% by volume of the hypochlorous acid aqueous solution, mixed, and the pH is 10.5. It is preferably a high concentration residual effective chlorine aqueous solution whose pH is adjusted to be ± 1.5. When this raw material aqueous solution is used, the change in concentration over time during long-term storage can be further reduced.

  Moreover, it is preferable that the hypochlorous acid aqueous solution used for raw material aqueous solution is the electrolytic hypochlorous acid aqueous solution produced | generated in the anode chamber of the electrolysis apparatus. In general, an electrolyzer includes an anode chamber having an anode electrode and a cathode chamber separated from the anode chamber by a diaphragm. Hypochlorous acid aqueous solution can be produced using such an electrolysis apparatus having an anode chamber having an anode electrode and a cathode chamber separated from the anode chamber by a diaphragm, and is produced in the anode chamber. Electrolytic hypochlorous acid aqueous solution can be used as a raw material of the above-mentioned high concentration residual effective chlorine aqueous solution. In the electrolysis, an aqueous solution containing chloride and 10% by weight or less of hydrochloric acid with respect to the chloride can be used. Specifically, sodium chloride can be used as the chloride, and a saturated aqueous solution of sodium chloride can be used. The concentration of hydrochloric acid can be, for example, 10% or less. Electrolysis can be performed by introducing an aqueous solution containing dilute hydrochloric acid into the anode chamber and the cathode chamber and applying a voltage to the anode electrode and the cathode electrode.

The method of adjusting the pH of the high-concentration residual effective chlorine aqueous solution as a raw material to 10.5 ± 1.5 is that an electrolytic hypochlorous acid aqueous solution is further introduced into the cathode chamber, and the electrolyte and the electrolyte are 3 This is a method in which hydrochloric acid of not more than wt% is added and the electrolytic hypochlorous acid aqueous solution is further electrolyzed while suppressing the difference between the amount of OH ⁻ generated at the cathode and the amount of H ⁺ generated at the anode. Is preferred. The concentration of hydrochloric acid used at this time is, for example, 10% or less.

  Next, the apparatus used for the manufacturing method of residual effective chlorine containing water of this invention is demonstrated.

  The schematic diagram of an example of the apparatus for producing the residual effective chlorine containing water of this invention in FIGS. This apparatus includes a diluting unit 6, a high-concentration residual effective chlorine aqueous solution introduction amount regulator 7, a water flow rectification unit 4, an acidic additive addition unit 3 and an acidic additive mixing unit 60, and an acidic additive introduction amount regulator 13 and the like. And an acidic additive introduction amount adjusting unit. Hereinafter, the configuration of the apparatus of the present invention will be described in more detail.

  First, an example of the apparatus of the present invention shown in FIG. 2 will be described. This apparatus has a water inlet 30 for introducing water such as tap water. Usually, the water inlet 30 is fluidly connected to a water pipe and supplied with tap water. The sterilized residual effective chlorine-containing water produced by the above method by this apparatus is taken out from the sterilized residual effective chlorine-containing water outlet 64 and can be used for sterilization of the object 65 to be sterilized. In the present specification and claims, along the flow of water or aqueous solution by the operation of the apparatus, the side close to the water inlet 30 of the apparatus is the “upstream side”, and the residual effective chlorine-containing water outlet for sterilization is used. The side close to 64 is called the “downstream side”. Similarly, other pipes are also referred to as “upstream side” and “downstream side” along the flow of the aqueous solution or the like. In addition, “fluid connection” means that fluid is allowed to flow between two parts by parts such as pipes, valves, and parts constituting the apparatus of the present invention.

  A water faucet on / off valve 8 for controlling the introduction of water is usually arranged on the downstream side of the water inlet 30. From the viewpoint of ease of operation, the faucet on-off valve 8 is preferably a cock that can be opened and closed with one touch. On the further downstream side of the faucet opening / closing valve 8, a high-concentration residual effective chlorine aqueous solution diluting section 6 (also simply referred to as “diluting section 6”) is arranged. The dilution unit 6 has a high concentration residual effective chlorine aqueous solution inlet 40 for introducing a high concentration residual effective chlorine aqueous solution. In the dilution section 6, a high concentration residual effective chlorine aqueous solution can be introduced from the high concentration residual effective chlorine aqueous solution inlet 40 and diluted with water to generate a diluted aqueous solution. If the venturi effect due to the flow of water is used, a high-concentration residual effective chlorine aqueous solution can be introduced from the high-concentration residual effective chlorine aqueous solution inlet 40 and mixed with water without providing a pump or the like.

  Usually, the apparatus of the present invention is provided with a high-concentration residual effective chlorine aqueous solution storage tank 10 for storing therein a high-concentration residual effective chlorine aqueous solution. Between the high-concentration residual effective chlorine aqueous solution storage tank 10 and the high-concentration residual effective chlorine aqueous solution introduction port 40, a high-concentration residual effective chlorine aqueous solution introduction amount regulator 7 is disposed, and diluted with water in the dilution unit 6. In this case, the introduction amount of the high concentration residual effective chlorine aqueous solution can be adjusted. The adjustment of the introduction amount of the high-concentration residual effective aqueous chlorine solution with respect to the water can be achieved, for example, by making the faucet on / off valve 8 only fully open and fully closed to keep the water flow rate constant when the water is introduced. This can be done by adjusting the introduction amount of the high concentration residual effective chlorine aqueous solution by the concentration residual effective chlorine aqueous solution introduction amount regulator 7 so as to have a predetermined value.

  It is preferable that the water flow rectification unit 4 is disposed further downstream of the dilution unit 6. In addition, for the fluid connection between the diluting unit 6 and the water flow rectifying unit 4, a dilute aqueous solution introduction pipe 5 can be disposed between them. In the water flow rectification unit 4, for example, as shown in FIG. 4, the water flow of the diluted aqueous solution is rectified by adopting a structure having a water flow stabilizing mechanism such as a protrusion arranged in the water channel of the diluted aqueous solution to stabilize the water flow. be able to. The inventor has found that the pH can be instantaneously converted to a predetermined value by introducing an acidic additive having a predetermined concentration and amount into flowing flowing water. Can do. In addition, the water flow rectification part 4 can make the inside of the acidic additive addition part 3 a gentle negative pressure by making it the structure which becomes narrow toward the downstream direction.

  An acidic additive is added to the diluted aqueous solution in the acidic additive addition unit 3 arranged further downstream of the dilution unit 6 or the water flow rectification unit 4. The acidic additive addition unit 3 is in contact with a dilution water injection pipe 305 having a diluted aqueous solution injection port 307 for injecting the diluted aqueous solution into the acidic additive addition unit 3, and at least a part of the outer wall of the dilution water injection pipe 305. Preferably, it includes an acidic additive retention space 303 defined by a surface 308 (shown by a broken line in FIG. 4) having a diluted aqueous solution injection port 307 and having an acidic additive introduction port 306. Since the acidic additive retention space 303 does not serve as a flow path for the diluted aqueous solution, the acidic additive stays in this space. The diluted aqueous solution rectified by the water flow rectifying unit 4 passes through the diluted water injection pipe 305 and contacts the acidic additive at the acidic additive adding unit 3. By setting the acidic additive addition unit 3 to such a structure, it is possible to introduce an acidic additive having a predetermined concentration and amount into flowing flowing water, and instantaneously convert the pH to a predetermined value. This can be done more reliably. In addition, when a water flow is accelerated in the water flow rectification part 4, it will be in a more preferable state with respect to pH conversion. Further, the diluted water injection pipe 305 can have a mechanism similar to the water flow stabilization mechanism disposed in the water flow rectification unit 4 therein. In that case, the stability of the water flow of the diluted aqueous solution at the diluted aqueous solution injection port 307 can be made more reliable, which is a more preferable state for pH conversion.

  The acidic additive introduction port 306 is fluidly connected to an acidic additive introduction amount adjusting unit having a configuration including the acidic additive introduction amount adjuster 13 through an acidic additive introduction pipe 304. In addition to the acidic additive introduction amount adjuster 13, the acidic additive introduction amount adjuster can include an acidic additive storage bottle 15, a hydraulic automatic open / close valve 12, a drip acidic additive temporary reservoir 500, and the like. The acidic additive introduction amount regulator 13 is preferably fluidly connected to an acidic additive storage bottle 15 for storing the acidic additive. In the case of the apparatus of FIG. 4, the acidic additive introduced into the acidic additive addition unit 3 stays in the acidic additive retention space 303 and contacts the gradually diluted aqueous solution.

  In the acidic additive mixing space 62, for example, a spiral wing structure member is installed, and the shape is narrowed down slightly and further opened immediately. It is preferable to have a structure that allows quick mixing with the acidic additive.

  The diluted aqueous solution converted to a predetermined pH can be used for sterilization as residual effective chlorine-containing water having sterilizing power.

  In the method for producing residual effective chlorine-containing water of the present invention, a diluted aqueous solution is produced by diluting high-concentration residual effective chlorine-containing water as a raw material, and an acidic additive is added to the diluted aqueous solution. At this time, the addition method of the acidic additive is any known method in which dilute hydrochloric acid is injected into a diluted aqueous solution of a residual effective chlorine aqueous solution such as a stationary sodium hypochlorite aqueous solution in a water tank to neutralize diffusion-controlled. However, as a mechanism for adding an acidic additive to a dilute aqueous solution of residual effective aqueous chlorine in running water, it is possible to use a mechanism as shown in a schematic diagram in FIG. This is preferable for accurate control. In this mechanism, the acidic additive stored in the acidic additive storage bottle 15 is introduced into the acidic additive via the hydraulic automatic open / close valve 12, the acidic additive introduction amount regulator 13, and the drip acidic additive temporary reservoir 500. The structure is such that it can be introduced from the pipe 304 into the acidic additive addition section 3.

  That is, the preferred acidic additive addition mechanism of the present invention is performed by using at least one drip acidic additive temporary storage 500 and adjusting the flow rate of the acidic additive by the acidic additive introduction amount regulator 13. Therefore, in the apparatus of the present invention, the drip acidic additive temporary reservoir 500 can include a drip storage pipe 510, a drip pipe 512, and a discharge pipe 513. The drip storage pipe 510 is airtight except for the entry and exit of liquid, and has a storage space 511 for storing the acidic additive. The dropping tube 512 is disposed at the upper end of the drip storage tube 510, one end is disposed inside the storage space 511 for dropping (drip) the acidic additive, and the other end is introduced with the acidic additive. Fluidly connected to the regulator 13. The inner diameter of the dropping tube 512 is smaller than the inner diameter of the drip storage tube 510. One end of the discharge pipe 513 is disposed at the lower end of the drip storage pipe 510 and the other end is fluidly connected to the acidic additive retention space 303 via the acidic additive introduction pipe 304. The inner diameter of the discharge pipe 513 is smaller than the inner diameter of the drip storage pipe 510. The storage space 511 is basically sealed with a sealing material such as a rubber plug 514 except that the dropping pipe 512 and the discharge pipe 513 have openings. However, as will be described later, an upper glass tube air pressure adjusting pipe 19 for enabling introduction of liquid or gas into the storage space 511 can be arranged as necessary. In addition, the height of the water surface in the dropping pipe 512 and the acidic additive adding part 3 is such that the introduction of the acidic additive is smoothly performed by the inflow due to the gentle negative pressure in the acidic additive adding part 3. It is preferable that the height is comparable.

  If further explanation is given, the acidic additive flowing through a path in which the discharge pipe of the drip acidic additive temporary reservoir 500 and the acidic additive adding section 3 are fluidly connected via the acidic additive introducing pipe 304, By making the inside of the acidic additive addition part 3 a gentle negative pressure to make it a static fluid, the drop of acidic acid additive temporary reservoir 500 depends on the weight of water droplets by drip in the acidic additive temporary reservoir 500. In order to accurately add the acidic additive introduced into the acidic additive addition unit 3 via the acidic additive introduction pipe 304 to the pressurized diluted aqueous solution, airtight acidic addition The pressure in the acidic additive introduction pipe 304 is controlled by securing the drip fall distance in the temporary agent storage tank 500 to 1 to 100 cm, and the acidic additive drip in the temporary acid storage tank 500 is performed. Have Sometimes performed additives acidic additive drop by drop exactly dilute aqueous solution, the addition of the acidic additive to the dilute aqueous solution infusion stops stops.

  The introduction of the acidic additive into the acidic additive adding unit 3 will be further described. The acidic additive stored in the lower part of the drip storage pipe 510 is fluidly connected to the acidic additive addition part 3 by the discharge pipe 513 and the acidic additive introduction pipe 304, and the inside of the acidic additive addition part 3 is Since it is in a slightly negative pressure state, the acidic additive retention space 303 is stationary. On the other hand, since the inside of the drip storage pipe 510 is in a hermetically sealed state, when instilled in the air layer in the pipe, the one is closed and temporarily sealed with the amount and weight of water of the acidic additive In accordance with Pascal's principle that pressure is applied to one point of the static fluid in the fluid and the pressure increases by the same amount throughout the liquid, the acidic additive injected into the diluted aqueous solution in the acidic additive addition unit 3 is used for drip storage. The amount of instillation into the tube 510 is injected, and when the infusion stops, the accuracy of stopping the injection is ensured.

  The drip acidic additive temporary reservoir 500 can drop (drip) the acidic additive from the dropping pipe 512 to the storage space 511 and temporarily store it. Moreover, as a material of the drip storage tube 510 of the drip acidic additive temporary storage device 500, a glass tube, an acrylic tube, and other resin tubes can be used.

  When such an addition mechanism is used, it is possible to observe how the acidic additive 16 is dripped from the dropping pipe 512 in the drip storage pipe 510 as shown in FIGS. 5 and 8. Since the drop of the acidic additive to be dropped is 0.02 to 0.05 mL, by adjusting the acidic additive introduction amount controller 13 while visually observing the dropping speed, the drop from the dropping pipe 512 is performed. The amount dripped into the storage space 511, that is, the amount of acidic additive introduced can be adjusted. Further, by using the drip acidic additive temporary reservoir 500, the amount of addition of the acidic additive can be adjusted more precisely and accurately. Therefore, it is preferable to use the drip acidic additive temporary reservoir 500 in order to mix a predetermined amount of the additive into the dynamic running water.

  In addition, as shown in FIG. 3, it is preferable that the drip acidic additive temporary reservoir 500 is provided with an upper glass tube air pressure adjusting pipe 19 and an air pressure adjusting on / off valve 14. These are used at the beginning of the apparatus start-up in order to store the acidic additive in the drip storage pipe 510 of the upper drip acidic additive temporary reservoir 500a. That is, when the apparatus is started, a thin tube is inserted into the upper glass tube air pressure adjusting pipe 19, and the acidic additive or water can be introduced into the drip storage tube 510 through the thin tube and stored. Further, the acidic additive can be removed from the drip storage pipe 510 when the apparatus is stopped by opening the air pressure adjusting on / off valve 14.

  The drip acid additive temporary storage device 500 is connected in series and arranged in a plurality, for example, as shown in FIG. 3, two drip acid additive temporary storage devices 500a and 500b are connected in series. Can play each role. That is, if the upper drip acidic additive temporary reservoir 500a is used, the number of water drops dripped to adjust the injection amount can be measured. On the other hand, the lower drip acidic additive temporary storage device 500b can store the acidic additive 16 in a fixed amount and then supply it to the acidic additive addition unit 3 via the acidic additive introduction pipe 304, which is precise and accurate. An acidic additive can be supplied. In this case, in order for the acidic additive to be smoothly introduced from the acidic additive introduction pipe 304 against the water pressure in the dilution section 6, the water level of the acidic additive in the drip acidic additive temporary reservoir 500b is high. Is preferably substantially equal to the height of the center of the dilution section 6.

  In addition, since the drip acidic additive temporary storage device 500 is made of a transparent material such as glass or transparent acrylic, it can be seen that the acidic additive inside is dripping. It can be used as a visual addition amount measuring instrument and an addition warning device for informing the user of the addition amount of the acidic additive and the presence or absence of mixing. When the acidic additive is not dripped, it indicates that the pH of the residual effective chlorine-containing water cannot be changed to a predetermined value having a sterilizing ability, so that sterilization is not effectively performed. The user can know that there is.

  In the method for producing residual effective chlorine-containing water of the present invention, the acidic additive is stored in the acidic additive storage bottle 15 and supplied for addition to the running water of the diluted aqueous solution of residual effective chlorine-containing water as necessary. Can do. At this time, it is preferable that the acidic additive storage bottle 15 has a warning device 18 that issues a warning when the acidic additive is reduced to a predetermined amount in the acidic additive storage bottle 15. The warning from the warning device 18 can be issued based on information on the remaining amount of acidic additive from the acidic additive remaining amount sensor 17. The “predetermined amount” can be appropriately set according to the use state of the acidic additive. For example, the amount is 1/5 or 1/10 of the volume of the acidic additive storage bottle 15. Can be set as

  The present invention is characterized in that by adding an acidic additive to a dilute aqueous solution, the pH is changed to a pH having a sterilizing effect and a pH of 6 ± 2, centering on a weakly acidic region. If the agent is not injected or used without being noticed, an alkaline dilute aqueous solution having a small sterilizing effect will flow out, which may cause food poisoning and the like. Therefore, in order to confirm that even an unskilled employee can be easily and reliably sterilized, the method and apparatus of the present invention has the warning device 18 as described above, and uses it. Is preferred.

  In the method and apparatus for producing residual effective chlorine-containing water of the present invention, the water pressure automatic opening / closing valve 12 can be provided in a pipe that fluidly connects the acidic additive introduction amount regulator 13 and the acidic additive storage bottle 15. In addition, a water tap detection valve 8 is provided between the water inlet 30 for introducing water and the diluting unit 6, and the water pressure is detected between the faucet on-off valve 8 and the diluting unit 6. It has a mechanism 9. The water pressure detection mechanism 9 detects the water pressure between the faucet opening / closing valve 8 and the diluting unit 6, and the water pressure automatic opening / closing valve 12 automatically opens / closes according to the water pressure. That is, since the water inlet 30 is usually fluidly connected to the water pipe, when the faucet opening / closing valve 8 is opened, water is supplied from the water inlet 30, and the water inlet 30, the dilution unit 6, A predetermined water pressure corresponding to the pressure of tap water is applied between the two. Therefore, when the water pressure detection mechanism 9 detects such a change in water pressure when the faucet opening / closing valve 8 is opened from the closed state, the automatic introduction of the acidic additive is automatically performed by opening the water pressure automatic opening / closing valve 12. To begin. In addition, when the faucet on / off valve 8 is opened, no water pressure is applied between the faucet on / off valve 8 and the diluting section 6, so that the water pressure change when the faucet on / off valve 8 is changed from open to closed. Is detected and the water pressure automatic opening / closing valve 12 is automatically closed.

  As an example of a mechanism for opening and closing the water pressure automatic opening / closing valve 12, a water pipe is fluidly connected to the opening / closing mechanism of the water pressure automatic opening / closing valve 12 from between the faucet opening / closing valve 8 and the diluting unit 6 to change the water pressure of the water pipe. Accordingly, a mechanism that automatically opens and closes the water pressure automatic opening / closing valve 12 may be used. Also, a water pressure sensor may be disposed between the faucet on / off valve 8 and the diluting unit 6 so that the automatic water pressure on / off valve 12 is automatically opened / closed in response to a signal from the water pressure sensor.

  Thus, the water pressure automatic opening / closing valve 12 detects the water pressure between the water inlet 30 and the diluting unit 6, and when the water pressure is equal to or higher than a predetermined water pressure, the water pressure automatic opening / closing valve 12 opens to add acidity. Allows the passage of the agent. This method ensures the introduction of acidic additives when sterilizing water is required, and avoids supplying residual effective chlorine-containing water without sterilizing ability. In addition, since the apparatus and method of the present invention are basically a natural fall outflow system, the water pressure automatic on-off valve 12 is closed when the water pressure is lower than a predetermined water pressure, thereby making it impossible to pass the acidic additive. Even if water is not introduced into the apparatus from the water inlet 30, it is possible to prevent economic loss due to the acid additive flowing out by mistake. Moreover, the apparatus of this invention can have the water pressure detection mechanism 9 and the water pressure automatic on-off valve 12 for embodying such a method.

  By using the method and apparatus of the present invention as described above, high-quality raw water is produced at a low cost in a factory and delivered to the use site, so that only a necessary minimum amount of tap water is provided. It is possible to use it in a timely manner simply by opening it.

  Next, operation | movement of the apparatus of this invention is demonstrated using FIGS.

  First, a predetermined high concentration residual effective chlorine aqueous solution is introduced into the high concentration residual effective chlorine aqueous solution storage tank 10. In addition, a predetermined acidic additive is introduced into the acidic additive storage bottle 15.

  Next, the tap valve 8 is opened, and tap water is introduced from the water inlet 30 fluidly connected to the water pipe. As a result, a flow of tap water is generated in the diluting section 6, and the high-concentration residual effective chlorine aqueous solution can be introduced at a predetermined flow rate from the high-concentration residual effective chlorine aqueous solution inlet 40 by the venturi effect. As a result, the diluting unit 6 can generate a dilute aqueous solution of high-concentration residual effective chlorine aqueous solution.

  The diluted aqueous solution is rectified by the water flow rectification unit 4, introduced into the acidic additive addition unit 3, and the acidic additive is added.

  On the other hand, the acidic additive is supplied from the acidic additive storage bottle 15 when tap water is introduced and the water pressure automatic opening / closing valve 12 is opened by a signal from the water pressure detection mechanism 9 or the like. In addition, when tap water is interrupted | blocked, the water pressure automatic on-off valve 12 closes, and supply of an acidic additive stops. Further, when the acidic additive in the acidic additive storage bottle 15 becomes less than a predetermined amount, the acidic additive remaining amount sensor 17 detects this, and a warning is issued from the warning device 18, and the acidic additive is detected. Encourage replenishment.

  The amount of the acidic additive supplied from the acidic additive storage bottle 15 is adjusted by the acidic additive introduction amount regulator 13 and introduced into the drip acidic additive temporary reservoir 500. The upper drip acidic additive temporary reservoir 500a is fluidly connected to the lower drip acidic additive temporary reservoir 500b, and the acidic additive drops in a drip manner in balance with the sealed air in the reservoir. As a result, the acidic additive is introduced from the acidic additive introduction port 306 to the acidic additive addition unit 3 via the acidic additive introduction pipe 304. In the acidic additive addition unit 3, the acidic additive stays in the acidic additive retention space 303.

  Note that the upper drip acidic additive temporary reservoir 500a and the lower drip acidic additive temporary reservoir 500b can drop (add drip) the acidic additive from the dropping pipe 512 to the storage space 511 and temporarily store it.

  The dilute aqueous solution that is dynamically flowing is brought into contact with the acidic additive remaining in the additive retention space in the acidic additive addition unit 3 and further introduced into the acidic additive mixing unit 60 for mixing stability. Is done. As a result, it is possible to obtain residual effective chlorine-containing water having a sterilizing ability having a pH of 6 ± 2 and a residual effective chlorine concentration of 10 ppm to 150 ppm. This residual effective chlorine-containing water is taken out from the residual effective chlorine-containing water outlet 64 and showered against the object 65 to be sterilized, so that the object 65 can be sterilized.

  FIG. 6 shows an apparatus for producing residual effective chlorine-containing water according to another embodiment of the present invention. The apparatus shown in FIG. 6 is different from the apparatus shown in FIG. 2 and FIG. Note that the tap water adjustment valve 75 and the raw water pressure automatic open / close valve 72 can also be used in the apparatus shown in FIGS. 2 and 3 described above can be added with the same configuration as that of the apparatus of this aspect described below, and the same conditions can be used.

In the apparatus of this aspect, as shown in FIG. 6, it is preferable to provide a tap water regulating valve 75 at the joint portion with the water supply (water supply) of the apparatus of the present invention. The water pressure of tap water for supplying tap water varies from 1 to 5 kg / cm ² depending on the region and place, and the water pressure is expected to fluctuate severely depending on usage conditions such as use in a kitchen. By providing the tap water regulating valve 75, by relaxing the fluctuation of the water pressure, it is possible to inject into an accurate acidic additive, so that it can be converted to an appropriate pH.

In the apparatus of this embodiment, water is supplied from water service, 30~300cm ³ / sec, more preferably 40~120cm ³ / sec, further preferably 50~90cm ³ / sec. When the amount of water supplied from the water supply is in such a range, a sufficient amount of residual effective chlorine-containing water having sterilizing power can be stably produced.

  A faucet opening / closing valve 8 is arranged in a pipe for supplying the water supply (water supply) to the apparatus of the present invention. From the viewpoint of operability, the faucet opening / closing valve 8 is preferably a cock that can be opened and closed with one touch. Note that the faucet opening / closing valve 8 and the tap water regulating valve 75 can be arranged by appropriately exchanging their positions.

  The apparatus shown in FIG. 6 preferably has a raw water pressure automatic open / close valve 72 in the pipe between the high-concentration residual effective chlorine aqueous solution storage tank 10 and the high-concentration residual effective chlorine aqueous solution introduction amount regulator 7. . The water pressure automatic open / close valve 72 for raw material water opens and closes similarly to the water pressure automatic open / close valve 12 installed in a pipe that fluidly connects the acidic additive introduction amount regulator 13 and the acidic additive storage bottle 15. That is, the water pressure detection mechanism 9 detects the water pressure between the faucet on-off valve 8 and the diluting unit 6, and the raw water pressure automatic on-off valve 72 is automatically opened and closed according to the water pressure. By opening / closing the water pressure automatic opening / closing valve 72 for raw material water, the high-concentration residual effective chlorine aqueous solution is introduced into the dilution section 6 only when tap water is flowing. This means that when the operation is stopped, the raw water which is a high concentration residual effective chlorine aqueous solution causes a siphon phenomenon and flows out to the high concentration residual effective chlorine containing water outlet 64 for sterilization without being diluted. Is to prevent. In order to avoid operation when the raw water (high concentration residual effective chlorine aqueous solution) runs out, a warning is given when the amount of the high concentration residual effective chlorine aqueous solution in the high concentration residual effective chlorine aqueous solution storage tank 10 is less than a predetermined amount. It is preferable to install a raw water warning device 71 for emitting The raw water warning device 71 issues a warning based on information from the high-concentration residual effective chlorine aqueous solution remaining sensor that the high-concentration residual effective chlorine aqueous solution storage tank has. The “predetermined amount” can be appropriately set according to the use state of the high-concentration residual effective chlorine aqueous solution. For example, the predetermined amount is one fifth of the volume of the high-concentration residual effective chlorine aqueous solution storage tank 10, or It can be set as an amount of 1/10.

  In the apparatus of this aspect, similarly to the apparatus shown in FIG. 2 and FIG. 3 described above, the dilution unit 6 uses a high-concentration residual effective chlorine aqueous solution and tap water so that the residual effective chlorine concentration is 10 ppm to 150 ppm. Dilute. The residual effective chlorine concentration after dilution is preferably 20 to 100 ppm, more preferably 40 to 60 ppm, from the viewpoint of preventing generation of trihalomethane, ensuring a predetermined sterilizing power and ensuring controllability of the apparatus. is there.

  By using the venturi effect due to the flow of tap water in the diluting unit 6, a high concentration residual effective chlorine aqueous solution is introduced from the high concentration residual effective chlorine aqueous solution inlet 40 without being provided with a pump or the like, and is supplied from the water supply. Can be mixed with water. At this time, in order to prevent the dilution concentration of the high-concentration residual effective chlorine aqueous solution from changing due to fluctuations in the water pressure of the tap water, the high-concentration residual effective chlorine aqueous solution enters the venturi in the venturi structure in the dilution section 6. It is preferable to provide a very fine bubble suction gap in the portion. Because the air elasticity of the bubbles can mitigate fluctuations in tap water pressure, fluctuations in the dilution concentration of the residual concentration effective chlorine aqueous solution due to fluctuations in tap water pressure can be prevented.

  The apparatus of this embodiment shown in FIG. 6 has a tilted tube 600 in the piping between the automatic hydraulic pressure on-off valve 12 and the acidic additive introduction amount regulator 13 in the acidic additive introduction amount adjustment unit. FIG. 7 shows a schematic diagram of the inclined tube 600. The inclined tube 600 can be made of a transparent glass tube, an acrylic tube, and other resin tubes. The inclined tube 600 has a shape of a tubular tube (an inclined tube 601), and at both ends of the inclined tube 601 are narrow tubes (an upstream tube 602 and a downstream tube) through which an acidic additive is passed. Side tubule 603). A thin tube that is fluidly connected to a pipe that goes to the acidic additive storage bottle 15 is an upstream thin tube 602, and a thin tube that is fluidly connected to a pipe that goes to the drip acidic additive temporary storage device 500 is a downstream thin tube 603. The inclined tube 600 is highly airtight and has a structure capable of sealing air except for the movement of the substance via the upstream thin tube 602 and the downstream thin tube 603. As shown in FIGS. 6 and 7, the inclined tube 600 is attached to the apparatus of the present embodiment at an angle. In other words, the inclined tube 600 is inclined so that the opening (liquid inlet 604) of the upstream narrow tube 602 to the inclined tube 601 is higher than the opening (liquid discharge port 605) of the downstream thin tube 603. A tube 600 is attached to the apparatus of this embodiment. As a result, the acidic additive introduced from the liquid inlet 604 is in a state where the water surface of the acidic additive is oblique to the tube wall of the inclined tube 601 while leaving a space in the inclined tube 601. Can be stored. By adopting such a structure, when the acidic additive stock solution is stored using a flexible container or the like on the acidic additive storage bottle 15 or the upper shelf, the height of the water level of the acidic additive changes. The water pressure of the acidic additive changes, and the amount of the acidic additive added changes slightly depending on the height. When the inclined tube 601 is provided, the natural flow of the acidic additive is once blocked by the air layer in the inclined tube 601. In this way, in accordance with a natural flowing water gradient, the acidic additive partly stored in the inclined tube 601 is drip acidic added at a constant outflow amount (outflow rate) by the acidic additive introduction amount regulator 13. It can be sent to the agent temporary reservoir 500. The acidic additive in the drip acidic additive temporary storage device 500 is accurately introduced into the acidic additive addition unit 3 from the acidic additive introduction port 306 through the acidic additive introduction pipe 304. In this way, it is possible to accurately add a certain amount (a constant speed) of the acidic additive to the residual effective chlorine-containing water. After the addition of the acidic additive, the pH of the residual effective chlorine-containing water for sterilization is pH 6 ± 2, preferably pH 6 ± 1.5.

  In order to accurately introduce the acidic additive, the angle at which the inclined tube 600 is obliquely attached to the apparatus of the present embodiment is determined when the tube is horizontal (the height of the liquid inlet 604 and the liquid outlet 605). Is 0 degree, 5 to 60 degrees, preferably 5 to 30 degrees.

  In the case of having the inclined tube 600, the drip acidic additive temporary reservoir 500 can be arranged in a single or a plurality in series as in the apparatus shown in FIGS. However, by having the inclined tube 600, the acidic additive introduction amount (introduction speed) can be made constant even when only one drip acidic additive temporary reservoir 500 is disposed. Therefore, from the viewpoint of cost reduction of the apparatus, when the inclined tube 600 is provided, it is preferable to arrange only one drip acidic additive temporary reservoir 500.

  In the case of the apparatus shown in FIG. 6, compared with the apparatus shown in FIGS. 2 and 3, the role of measuring the number of drops (number of infusions) of the drip acidic additive temporary reservoir 500a is evolved, and the role of flow rate adjustment is improved. The inclined tube 600 is provided. Further, in the apparatus of FIGS. 2 and 3, the length of the tube of the drip acidic additive temporary storage device 500 (corresponding to the drip acidic additive temporary storage device 500b of FIG. 2 and FIG. 3) is doubled or more. The dropping distance from the dropping tube 512 to the surface of the acidic additive 16 staying at the bottom of the drip acidic additive temporary storage 500 can be increased. For example, in the drip acidic additive temporary reservoir 500 shown in FIG. 8, compared to the one shown in FIG. 5, the drop distance from the dropping pipe 512 to the surface of the acidic additive 16 staying at the bottom is longer. Yes. In order to more accurately add the acidic additive to the diluted aqueous solution, the lower limit of the drop distance is 1 cm or more, preferably 5 cm or more, and more preferably 10 cm or more. The upper limit of the drop distance is 100 cm or less, preferably 50 cm or less, more preferably 30 cm or less, from the viewpoint of the cost of the apparatus cost.

  Also in the apparatus shown in FIG. 6, as in the apparatus shown in FIGS. 2 and 3, the height of the water surface in the drip acidic additive temporary reservoir 500 and the acidic additive addition unit 3 is determined by the acidic additive. In order to smoothly introduce by the inflow due to a gentle negative pressure in the acidic additive addition section 3, it is preferable to set the height to the same level. The acidic additive stored in the lower part of the drip storage pipe 510 of the drip acidic additive temporary reservoir 500 is fluidly connected to the acidic additive addition unit 3 by the discharge pipe 513 and the acidic additive introduction pipe 304, Since the inside of the acidic additive addition part 3 is slightly in a negative pressure state, the acidic additive in the acidic additive retention space 303 is almost stationary. On the other hand, since the inside of the drip storage pipe 510 is in a hermetically sealed state, when instilled in the air layer in the pipe, the one is closed and temporarily sealed with the amount and weight of water of the acidic additive The acidic additive injected into the diluted aqueous solution in the acidic additive addition unit 3 is drip-reserved according to Pascal's principle that when the pressure is applied to one point of the stationary fluid at the same point, the pressure increases by the same amount throughout the liquid. An instilled amount is injected into the working tube 510. Further, the pressure in the acidic additive introduction pipe is applied by doubling the length of the temporary drip acid additive reservoir, and injection stops when the drip in the drip acidic additive temporary reservoir 500 stops. This is also considered that the acidic additive in the acidic additive retention space 303 is pushed upward by the falling distance from the dropping pipe 512 to the acidic additive remaining at the bottom of the drip acidic additive temporary storage 500. . In the apparatus of the present invention, the acidic additive is continuously injected into the diluted aqueous solution in the acidic additive addition unit 3 at an accurate addition amount (addition rate).

  As in the case shown in FIG. 3, the upper drip acidic additive temporary reservoir 500 is preferably provided with the upper glass tube air pressure adjusting pipe 19 and the air pressure adjusting on / off valve 14. These are used at the initial stage of starting the apparatus in order to store the acidic additive in the drip storage pipe 510 of the upper drip acidic additive temporary reservoir 500. That is, when the apparatus is started, a thin tube is inserted into the upper glass tube air pressure adjusting pipe 19, and the acidic additive or water can be introduced into the drip storage tube 510 through the thin tube and stored. Further, the acidic additive can be removed from the drip storage pipe 510 when the apparatus is stopped by opening the air pressure adjusting on / off valve 14.

  Next, operation | movement of the apparatus of this invention is demonstrated using FIGS.

  First, a predetermined high concentration residual effective chlorine aqueous solution is introduced into the high concentration residual effective chlorine aqueous solution storage tank 10. In addition, a predetermined acidic additive is introduced into the acidic additive storage bottle 15.

  Next, tap water is introduced from a water introduction port 30 that opens the faucet opening / closing valve 8 and is fluidly connected to the water supply pipe so that the tap water has a predetermined flow rate by the tap water adjustment valve 75. Thereby, it is detected that the water pressure is applied to the water pressure detection mechanism 9 of the water pipe, and the water pressure automatic opening / closing valve 72 for the raw material water which is closed by using a mechanism having a spring or the like is automatically opened by the water pressure. As a result, a flow of tap water is generated in the diluting section 6, and the high-concentration residual effective chlorine aqueous solution can be introduced at a predetermined flow rate from the high-concentration residual effective chlorine aqueous solution inlet 40 by the venturi effect. As a result, the diluting unit 6 can generate a dilute aqueous solution of high-concentration residual effective chlorine aqueous solution. When tap water is shut off, the pipe connected to the residual effective chlorine-containing water outlet 64 for sterilization is open to the outside. Then, the water pressure automatic open / close valve 72 for the raw material water is closed, and the supply of the high concentration residual effective chlorine aqueous solution is stopped. Further, when the amount of the high concentration residual effective chlorine aqueous solution in the high concentration residual effective chlorine aqueous solution storage tank 10 becomes smaller than a predetermined amount, the raw water warning device 71 issues a warning.

  The diluted aqueous solution moves from the dilution unit 6 to the water flow rectification unit 4 by water pressure. The diluted aqueous solution is rectified by the water flow rectification unit 4, introduced into the acidic additive addition unit 3, and the acidic additive is added.

  On the other hand, the acidic additive is supplied from the acidic additive storage bottle 15 when tap water is introduced and the water pressure automatic opening / closing valve 12 is opened by a signal from the water pressure detection mechanism 9 or the like. In addition, when tap water is interrupted | blocked, the water pressure automatic on-off valve 12 closes, and supply of an acidic additive stops. Further, when the acidic additive in the acidic additive storage bottle 15 becomes less than a predetermined amount, the acidic additive remaining amount sensor 17 detects this, and a warning is issued from the warning device 18, and the acidic additive is detected. Encourage replenishment.

  The acidic additive supplied from the acidic additive storage bottle 15 is first introduced into the inclined tube 600. The amount of the acidic additive coming out of the inclined tube 600 is adjusted by the acidic additive introduction amount regulator 13 and introduced into the drip acidic additive temporary reservoir 500. The acidic additive is dripped in a drip manner in balance with the sealed air in the drip acidic additive temporary reservoir 500. As a result, the acidic additive is introduced from the acidic additive introduction port 306 to the acidic additive addition unit 3 via the acidic additive introduction pipe 304. In the acidic additive addition unit 3, the acidic additive stays in the acidic additive retention space 303.

  The dilute aqueous solution that is dynamically flowing is introduced by the acidic additive addition mechanism as described above in the acidic additive addition unit 3, and comes into contact with the acidic additive remaining in the additive retention space, Mixed. For mixing at this time, an acidic additive mixing section 60 can be provided as shown in FIG. Further, the pipe 64 to the residual effective chlorine-containing water outlet 64 for sterilization can also serve as the acidic additive mixing part 60. As a result, it is possible to obtain residual effective chlorine-containing water having a sterilizing ability having a pH of 6 ± 2 and a residual effective chlorine concentration of 10 ppm to 150 ppm. This residual effective chlorine-containing water is taken out from the residual effective chlorine-containing water outlet 64 and showered against the object 65 to be sterilized, so that the object 65 can be sterilized.

  Since the apparatus of the present invention uses the pressure of tap water, the flow of acidic additives, and the venturi mechanism for mixing high-concentration residual effective aqueous chlorine solution for fluid transportation and mixing, it transports fluid such as pumps. Therefore, an apparatus for performing the operation and electric power for driving the apparatus are unnecessary, a low-cost apparatus, and an operation is simple. The apparatus of the present invention makes it possible to use residual effective chlorine-containing water (hypochlorous acid-containing water) having sterilizing power at a low cost.

  When using the method and apparatus of the present invention for food sterilization, for example, water containing a high concentration of sodium hypochlorite is previously added with water so that the residual effective chlorine concentration is 2000 ppm to 10000 ppm, preferably 5000 ppm to 10000 ppm. By diluting, a high-concentration residual effective chlorine aqueous solution that becomes raw material water can be obtained. After diluting the aqueous solution of the raw material water so that the residual effective chlorine concentration becomes 10 ppm to 150 ppm, preferably 30 ppm to 90 ppm by the apparatus of the present invention, a small amount of an acidic additive is added, which is effective for sterilization. Residual effective chlorine-containing water can be obtained in a certain pH range, that is, in the range of pH 6 ± 2, preferably in the range of pH 6 ± 1.5.

  Moreover, the high concentration residual effective chlorine aqueous solution used as raw material water can be selected suitably according to the intended purpose of the method and apparatus of this invention. For example, when residual effective chlorine-containing water for sterilization obtained by the method of the present invention is used for sterilization for repairing wounds, high-concentration electrolyzed water by electrolysis with small clusters may be used as raw water. It is said to be effective. Since the upper limit of the concentration of the high concentration electrolytic hypochlorous acid aqueous solution by electrolysis is generally about 2000 ppm, in order to reduce the cost and extend the retention period of the raw material water, the pH is adjusted to 10 to 12 to 2500 to 4000 ppm. Therefore, the concentration can be increased and the concentration holding period can be extended. A high concentration electrolytic hypochlorous acid aqueous solution is used as raw water and diluted by the method of the present invention so that the residual effective chlorine concentration is 10 ppm to 150 ppm, preferably 30 ppm to 90 ppm. Then, a predetermined amount of weak acid is added and sterilized. The residual effective chlorine-containing water for sterilization can be obtained by converting into a range of pH effective against the above, that is, a range of pH 6 ± 2, preferably a range of pH 6 ± 1.5.

  In addition, the method and apparatus of the present invention can be used for disinfecting fingers and the like at medical or nursing care sites. For such applications, when using high-concentration electrolytic hypochlorous acid aqueous solution by electrolysis as raw water, the residual effective chlorine concentration of raw water is reduced to supply residual effective chlorine-containing water for sterilization at low cost. Further increase is effective. For this purpose, by mixing high-concentration electrolytic hypochlorous acid aqueous solution with high-concentration sodium hypochlorite-containing water of about 10 to 20%, the residual effective chlorine concentration of 5000 ppm to 7000 ppm and pH 10-12 raw water An aqueous solution can be obtained. By adding a small amount of weak acid (intravenous addition) to the aqueous solution as the raw material water using the apparatus and method of the present invention, the pH is changed to a range of 6 ± 2, preferably 6 ± 1.5. By using this, residual effective chlorine-containing water for sterilization at low cost can be obtained.

  The invention is explained in detail by means of examples. In addition, in the present Example, the electrolysis water manufacturing apparatus used the "Sunny high (trademark)" supply apparatus of the electrolyzed water production | generation apparatus by Zipcom Corporation. This apparatus is a continuous production apparatus for electrolyzed water, and by adjusting the flow rates of a saturated aqueous NaCl solution (“NaCl” in the table) and an aqueous HCl solution (concentration 40%, “HCl” in the table) at room temperature, The residual effective chlorine concentration of the electrolyzed water can be adjusted. In the description of this example, the ratio (% and ppm) indicates the weight ratio (% by weight and ppm by weight) unless otherwise specified.

<Experiment 1>
First, the stability of the pH of the existing high concentration electrolytic hypochlorous acid aqueous solution was verified. Table 2 shows the pH change with time of the slightly alkaline highly concentrated electrolyzed water. In addition, Table 1 shows the additives and flow rates in the electrolyzed water production. As shown in Table 2, it was clarified that the pH in the neutral to weakly alkaline region of the high concentration electrolytic hypochlorous acid aqueous solution was relatively stable over time.

<Experiment 2>
Next, Table 4 shows the measurement results of changes over time in the residual effective chlorine concentration in the alkaline region of the high concentration electrolytic hypochlorous acid aqueous solution. The high concentration electrolytic hypochlorous acid aqueous solution for this experiment is electrolyzed water produced by electrolysis. Table 3 shows additives and flow rates for electrolysis of the electrolyzed water. The addition of hydrochloric acid is known to contribute to pH stability in the weakly acidic region, but in the alkaline region as shown in Table 4, as the amount of hydrochloric acid added as shown in Table 3 increases, It was found that the residual effective chlorine concentration was greatly attenuated. In addition, this measurement was performed by hold | maintaining high concentration electrolytic hypochlorous acid aqueous solution in a transparent plastic container at room temperature (average 15 degreeC).

<Experiment 3>
Next, in order to further evaluate the stability of the high concentration electrolytic hypochlorous acid aqueous solution in the weakly alkaline region, the correlation between pH and residual effective chlorine concentration was examined. Table 6 shows changes in residual effective chlorine concentration and pH over time when the pH is raised to 10.5 ± 1.5. The high concentration electrolytic hypochlorous acid aqueous solution for this experiment is electrolyzed water produced by electrolysis. Table 5 shows additives and flow rates of the electrolyzed water during electrolysis. As is clear from Tables 5 and 6, although it varies depending on the setting conditions, the pH is in the range of 10.5 ± 1.5, and the concentration is stable with ph. That is, it has been clarified that by raising the pH to 10.5 ± 1.5, both the pH and the concentration of the high concentration electrolytic hypochlorous acid aqueous solution can be stabilized over time. Thus, the high concentration electrolytic hypochlorous acid aqueous solution whose concentration limit in the weakly acidic region was 2000 ppm was raised to 10.5 ± 1.5 by performing electrolysis without using hydrochloric acid. It was revealed that the residual effective chlorine concentration can be stably increased to about 3000 to 4000.

<Experiment 4>
Next, a high concentration hypochlorous acid aqueous solution (electrolytic hypochlorous acid aqueous solution) was generated around pH 8 by electrolysis. Table 7 shows the additive, effective chlorine amount, and sodium hypochlorite addition amount at the time of electrolysis. Then, it was left in the pack for 2 weeks, and 50000 ppm of sodium hypochlorite solution was added to the aqueous solution having reached a stable range due to a decrease in the side reaction in the aqueous solution, as shown in Table 7. 2% of the amount was added to obtain a high concentration residual effective chlorine aqueous solution. Table 8 shows the change over time in the amount of residual effective chlorine in this high-concentration residual effective chlorine aqueous solution.

  As a result of this experiment, a high-concentration residual effective chlorine aqueous solution having a pH of around 10.5 is produced by electrolysis and left for a period during which the effective chlorine decreases due to side reactions in the solution, and then 50000 ppm of sodium hypochlorite. By adding 2% of the amount of hypochlorous acid aqueous solution, it became clear that a high concentration residual effective chlorine aqueous solution stable over time can be obtained.

<Experiment 5>
Next, in the apparatus of the present invention, residual effective chlorine-containing water for sterilization was produced using the method of the present invention. As shown in Table 9, the high concentration residual effective chlorine aqueous solution used as the stock solution was hypochlorous acid 3000 ppm. The pH of the stock solution was 10.3. The apparatus of the present invention was operated by diluting this undiluted solution with tap water 50 times the amount of the undiluted solution in the diluting unit to obtain a dilute aqueous solution having a residual effective chlorine concentration of 60 ppm. Table 10 shows the pH measurement results after the pH change using 5% dilute hydrochloric acid as the acidic additive. Further, Table 11 shows the pH in this manner when the apparatus is operated in the same manner by changing only the kind (concentration) of the acidic additive. In addition, acetic acid and hydrochloric acid were used by diluting to a concentration of 5%, and vinegar having a concentration of acetic acid of 3% was used. As is clear from these results, it is possible to obtain residual chlorine-containing water having a predetermined residual effective chlorine concentration that does not produce trihalomethane and having a pH of 6 ± 2 that shows sterilizing ability, using the apparatus and method of the present invention. did it.

<Experiment 6>
Next, residual effective chlorine-containing water was produced using the apparatus and method of the present invention using hypochlorous acid, sodium hypochlorite, and a mixture thereof as raw water. Hypochlorous acid (3000 ppm) and sodium hypochlorite (50000 ppm) were mixed at a volume ratio shown in Table 12, and the concentration was adjusted with water to obtain a high-concentration residual effective chlorine aqueous solution. Residual effective chlorine-containing water was produced from this high-concentration residual effective chlorine aqueous solution as raw water. During the production, the dilution of the high concentration residual effective chlorine aqueous solution was adjusted so that the finally obtained residual effective chlorine concentration was 50 ppm. Table 12 shows manufacturing conditions and results. Thus, residual effective chlorine-containing water having a predetermined concentration and a predetermined pH sterilizing ability could be obtained by the apparatus and method of the present invention.

<Experiment 7>
Next, dilution of the high-concentration residual effective chlorine aqueous solution with tap water was attempted using the apparatus shown in FIG. At this time, the valve throttle of the high-concentration residual effective chlorine aqueous solution introduction amount regulator was adjusted so that the residual effective chlorine concentration after dilution of different concentrations of the high-concentration residual effective chlorine aqueous solution was 50 ppm. Table 13 shows the residual effective chlorine concentration after dilution. When the residual effective chlorine concentration of the high-concentration residual effective chlorine aqueous solution, which is the raw material water, is 30000 ppm, it is difficult to adjust the residual effective chlorine concentration. However, when raw water having other concentrations is used, FIG. It was possible to adjust the residual effective chlorine concentration after dilution to 50 ppm by using the apparatus shown in FIG.

<Experiment 8>
Next, the residual effective chlorine containing water was manufactured using the apparatus shown in FIG. As raw material water, a sodium hypochlorite aqueous solution having a concentration of 10,000 ppm was used in a high concentration residual effective chlorine aqueous solution storage tank. The amount of tap water was adjusted by the tap water adjustment valve 75 so that the flow rate of tap water was 125 mL / sec. As the acidic additive, a predetermined amount of vinegar (acetic acid concentration: 3%) was introduced to produce residual effective chlorine-containing water.

  Table 14 shows the results obtained in this example. All of the residual effective chlorine aqueous solutions in the examples of Table 14 were in the range of pH 6 ± 2 hydrogen ion concentration having a high bactericidal effect.

It is a schematic diagram of the relationship between the presence form of sodium hypochlorite containing water (residual effective chlorine aqueous solution) and pH. It is a schematic diagram of an example of the apparatus for manufacturing the residual effective chlorine containing water of this invention. It is a schematic diagram of an example of the part which supplies an acidic additive among the apparatuses for manufacturing the residual effective chlorine containing water of this invention. It is a schematic diagram of an example of an acidic additive addition part among the apparatuses for producing the residual effective chlorine containing water of this invention. It is a schematic diagram of an example of a drip acidic additive temporary storage among the apparatuses for producing the residual effective chlorine containing water of this invention. It is a schematic diagram for another implementation body of the apparatus for producing the residual effective chlorine-containing water of the present invention. It is a schematic diagram of an example of an inclined tube. It is a schematic diagram of an example of a drip acidic additive temporary storage among the apparatuses for producing the residual effective chlorine containing water of this invention.

Explanation of symbols

3 Acid additive addition part 4 Water flow rectification part 5 Diluted aqueous solution introduction pipe 6 Dilution part (concentration residual effective chlorine aqueous solution dilution part)
7 High-concentration residual effective chlorine aqueous solution introduction amount regulator 8 Faucet opening / closing valve 9 Water pressure detection mechanism (water pressure introduction joint)
DESCRIPTION OF SYMBOLS 10 High concentration residual effective chlorine aqueous solution storage tank 11 Hydraulic transmission pipe 12 Hydraulic automatic open / close valve 13 Acid additive introduction amount regulator 14 Air pressure adjustment open / close valve 15 Acid additive storage bottle 16 Acid additive 17 Acid additive residual amount sensor 18 Warning Device 19 Upper glass tube air pressure adjustment pipe 20 Residual effective chlorine-containing water 30 Water introduction port 40 High concentration residual effective chloric acid aqueous solution introduction port 60 Acid additive mixing part 61 Backflow prevention valve 62 Additive mixing space 64 Residue effective for sterilization Chlorine-containing water outlet 65 Object to be sterilized 71 Raw water warning device 72 Raw water pressure automatic open / close valve 75 Tap water regulating valve 303 Acid additive retention space 304 Acid additive inlet pipe 305 Diluted water injection pipe 306 Acid additive inlet 307 Diluted aqueous solution injection port 308 Surface 500, 500a, 500b having diluted aqueous solution injection port Drip acidic additive temporary reservoir 510 drip storage pipe 511 storage space 512 drip pipe 513 discharge pipe 514 rubber plug 600 inclined tube 601 inclined tube 602 upstream side narrow tube 603 downstream side narrow tube 604 liquid inlet 605 liquid outlet

Claims (22)

By diluting a high-concentration residual effective chlorine aqueous solution having a residual effective chlorine concentration of 2000 ppm to 6000 ppm or 2000 ppm to 10,000 ppm and a pH of 10.5 ± 1.5 with water, the residual effective chlorine concentration is 10 ppm. Producing a dilute aqueous solution of ~ 150 ppm;
A method for producing residual effective chlorine-containing water for sterilization, comprising the step of adding an acidic additive having a concentration of 30% by weight or less to running water of the diluted aqueous solution and adjusting the pH of the diluted aqueous solution to be 6 ± 2.   The method for producing residual effective chlorine-containing water according to claim 1, wherein the addition of the acidic additive is performed on the stream of accelerated diluted aqueous solution.   The method for producing residual effective chlorine-containing water according to claim 1 or 2, wherein the acidic additive comprises at least one selected from vinegar, hydrochloric acid having a concentration of 20% by weight or less, and acetic acid having a concentration of 20% by weight or less.   The manufacturing method of the residual effective chlorine containing water of any one of Claims 1-3 whose high concentration residual effective chlorine aqueous solution is hypochlorous acid aqueous solution, sodium hypochlorite aqueous solution, or these mixed aqueous solution. A high concentration residual effective chlorine aqueous solution is added to a sodium hypochlorite aqueous solution having a residual effective chlorine concentration of 50,000 to 60000 ppm at a ratio of 2 to 10% by volume with respect to 100% by volume of the hypochlorous acid aqueous solution, and mixed. It is a high concentration residual effective chlorine aqueous solution whose pH is adjusted to 10.5 ± 1.5,
An aqueous solution of hypochlorous acid is prepared by using an electrolysis apparatus having an anode chamber having an anode electrode and a cathode chamber separated from the anode chamber by a chloride and hydrochloric acid having a concentration of 10% by weight or less based on the chloride. 4. An electrolytic hypochlorous acid aqueous solution produced in the anode chamber by introducing an aqueous solution containing a hydrogen into the anode chamber and the cathode chamber and applying a voltage to the anode electrode and the cathode electrode. The method for producing residual effective chlorine-containing water according to claim 1. The addition of acidic additives to the running water of the diluted aqueous solution
A drip storage tube having a storage space for instilling and storing the acidic additive;
The drip tube is arranged at the upper end of the drip storage tube, one end is arranged inside the storage space, the other end is fluidly connected to the acidic additive introduction amount regulator, and the inner diameter is smaller than the inner diameter of the drip storage tube. When,
At least one drip acid addition including one end disposed at the lower end of the drip storage tube, the other end fluidly connected to the acid additive introduction tube, and a discharge tube having an inner diameter smaller than the inner diameter of the drip storage tube Performed using a temporary reservoir
The amount of addition of the acidic additive is adjusted by adjusting the amount of the acidic additive introduced into the storage space by adjusting the amount of acid additive introduced into the storage space by adjusting the acidic additive introduction amount regulator. The manufacturing method of the residual effective chlorine containing water of any one of 1-5.   The addition of the acidic additive to the running water of the diluted aqueous solution has a liquid inlet at one end and a liquid outlet at the other end fluidly connected to the acidic additive introduction amount regulator and the drip acidic additive temporary reservoir. The apparatus for producing residual effective chlorine-containing water according to claim 6, further comprising a slanted tube attached so that the liquid inlet is positioned higher than the liquid outlet.   The method for producing residual effective chlorine-containing water according to claim 6 or 7, wherein two drip acidic additive temporary reservoirs are connected in series.   An acidic additive that flows through a path in which the discharge pipe of the drip acidic additive temporary storage device and the acidic additive addition section are fluidly connected via the acidic additive introduction pipe, and a gentle negative pressure is generated in the acidic additive addition section. By making it into a static fluid, by the weight of water droplets by drip in the drip acidic additive temporary reservoir, from the drip acidic additive temporary reservoir to the acidic additive addition part through the acidic additive introduction pipe In order to accurately add the acidic additive to be introduced to the diluted aqueous solution in a pressurized flowing water state, a drip drop distance in the airtight acidic additive temporary reservoir is secured to 1 to 100 cm. By controlling the pressure in the acidic additive introduction pipe, when the acidic additive in the drip acidic additive temporary reservoir is instilled, the acidic additive is accurately added to the diluted aqueous solution one by one. When the water stops The addition of the acidic additive to the liquid stops, the manufacturing method of the residual available chlorine-containing water according to any one of claims 6-8.   The acidic additive storage bottle fluidly connected to the acidic additive introduction amount regulator has an acidic additive residual amount sensor and a warning device that issues a warning based on information from the acidic additive residual amount sensor, and the acidic additive The residual effective chlorine content according to any one of claims 6 to 9, wherein a warning is issued from a warning device when the volume of the acidic additive in the storage bottle is reduced to one fifth of the volume of the acidic additive storage bottle. Water production method. In the pipe that fluidly connects the water inlet for introducing water and the dilution part, it has a faucet on-off valve,
The pipe that fluidly connects the faucet on-off valve and the dilution part has a water pressure detection mechanism that detects the water pressure,
A water pressure automatic on-off valve that automatically opens and closes in response to changes in water pressure is connected to the pipe that fluidly connects the acidic additive introduction amount regulator and the acidic additive storage bottle fluidly connected to the acidic additive introduction amount regulator. Have
When the water pressure detection mechanism detects a change in water pressure when the faucet opening / closing valve is opened from the closed position, the water pressure automatic opening / closing valve opens to allow the passage of the acidic additive, and the faucet opening / closing valve is closed from the opened position. The production of residual effective chlorine-containing water according to any one of claims 6 to 10, wherein when a change in water pressure is detected, the automatic open / close valve of the water pressure is closed so that passage of the acidic additive is impossible. Method. A water inlet for introducing water;
Located at the downstream side of the water inlet, it has a high concentration residual effective chlorine aqueous solution inlet and dilutes the high concentration residual effective chlorine aqueous solution introduced from the high concentration residual effective chlorine aqueous solution inlet with water to generate a diluted aqueous solution. A dilution part to be
A high concentration residual effective chlorine aqueous solution introduction amount controller fluidly connected to the high concentration residual effective chlorine aqueous solution introduction port;
An acidic additive addition part arranged on the downstream side of the dilution part for adding an acidic additive,
An acidic additive mixing part that is arranged downstream of the acidic additive adding part and that mixes the diluted aqueous solution and the acidic additive to obtain residual effective chlorine-containing water,
An acidic additive introduction amount adjusting unit including an acidic additive introduction amount regulator fluidly connected to the acidic additive introduction port by an acidic additive introduction pipe;
A device for producing residual effective chlorine-containing water for sterilization. Between the dilution part and the acidic additive addition part, a water flow rectification part having a water flow stabilization mechanism for rectifying the water flow of the diluted aqueous solution inside is further arranged,
The acidic additive addition part is in contact with a diluted aqueous solution injection pipe having a diluted aqueous solution injection port for injecting the diluted aqueous solution into the acidic additive addition part, and at least a part of the outer wall of the diluted aqueous solution injection pipe. The residual effective chlorine containing water manufacturing apparatus of Claim 12 including the acidic additive retention space which is demarcated by the surface to have and has an acidic additive introduction port.   The residual effective chlorine-containing water production apparatus according to claim 12 or 13, wherein the diluted aqueous solution injection pipe has a water flow stabilization mechanism for stabilizing the water flow inside thereof. The acidic additive introduction amount adjusting unit further includes at least one drip acidic additive temporary reservoir,
A drip acidic additive temporary reservoir
An airtight drip storage tube having a storage space for storing the acidic additive;
The drip tube is arranged at the upper end of the drip storage tube, one end is arranged inside the storage space, the other end is fluidly connected to the acidic additive introduction amount regulator, and the inner diameter is smaller than the inner diameter of the drip storage tube. When,
The one end is disposed at the lower end of the drip storage pipe, the other end is fluidly connected to the acidic additive introduction pipe, and the discharge pipe includes a discharge pipe having an inner diameter smaller than the inner diameter of the drip storage pipe. The residual effective chlorine containing water manufacturing apparatus of any one of Claims. The acidic additive introduction amount adjusting unit further includes a tilted tube,
The inclined tube has a liquid inlet at one end and a liquid outlet at the other end fluidly connected to the acidic additive introduction amount regulator and the drip acidic additive temporary reservoir, The residual effective chlorine containing water manufacturing apparatus of Claim 15 attached so that it may be located higher than a liquid discharge port.   The residual effective chlorine containing water manufacturing apparatus of Claim 15 or 16 in which an acidic additive introduction amount adjustment | control part contains the drip acidic additive temporary storage device connected 2 in series.   The drip acidic additive temporary storage device is a visual addition amount measuring device and an addition warning device for informing the user of the addition amount of acid additive by the number of infusions and the presence or absence of mixing. The residual effective chlorine containing water manufacturing apparatus of any one of these. The acidic additive introduction amount adjustment unit includes an acidic additive storage bottle fluidly connected to the acidic additive introduction amount regulator,
The acidic additive storage bottle has a warning device that issues a warning based on information from the acidic additive remaining amount sensor, and the volume of the acidic additive in the acidic additive storage bottle is 5 minutes of the volume of the acidic additive storage bottle The residual effective chlorine containing water manufacturing apparatus of any one of Claims 12-18 which further has a mechanism which issues a warning from a warning device when it reduces to 1 of these. The residual effective chlorine-containing water production apparatus includes a high concentration residual effective chlorine aqueous solution storage tank fluidly connected to the high concentration residual effective chlorine aqueous solution introduction amount regulator,
The high concentration residual effective chlorine aqueous solution storage tank has a high concentration residual effective chlorine aqueous solution remaining amount sensor,
The residual effective chlorine-containing water production device has a warning device for raw water that issues a warning based on information from the high concentration residual effective chlorine aqueous solution residual amount sensor,
The warning device for raw material water issues a warning when the volume of the high concentration residual effective chlorine aqueous solution storage tank is reduced to one fifth of the volume of the high concentration residual effective chlorine aqueous solution storage tank. The residual effective chlorine containing water manufacturing apparatus of any one of Claims 12-19 which has these. Between the water inlet for introducing water and the dilution part, it has a faucet on-off valve,
Between the faucet on-off valve and the dilution part, it has a water pressure detection mechanism that detects water pressure,
The piping that fluidly connects the acidic additive introduction amount regulator and the acidic additive storage bottle has a water pressure automatic opening and closing valve that automatically opens and closes according to the water pressure,
When the water pressure detection mechanism detects a change in water pressure when the faucet opening / closing valve is opened from the closed position, the water pressure automatic opening / closing valve opens to allow the passage of the acidic additive, and the faucet opening / closing valve is closed from the opened position. The residual effective chlorine according to any one of claims 12 to 20, further comprising a mechanism for disabling the passage of the acidic additive by closing the automatic pressure control valve when a change in water pressure is detected. Contained water production equipment. The residual effective chlorine-containing water production apparatus includes a high concentration residual effective chlorine aqueous solution storage tank fluidly connected to the high concentration residual effective chlorine aqueous solution introduction amount regulator,
In the pipe that fluidly connects the water inlet for introducing water and the dilution part, it has a faucet on-off valve,
Between the faucet on-off valve and the dilution part, it has a water pressure detection mechanism that detects water pressure,
The piping that connects the high concentration residual effective chlorine aqueous solution introduction amount controller and the high concentration residual effective chlorine aqueous solution storage tank with a fluid connection has a water pressure automatic open / close valve for raw water that automatically opens and closes according to the water pressure,
When the water pressure detection mechanism detects a change in water pressure when the faucet opening / closing valve is opened from the closed position, the water pressure automatic opening / closing valve for the raw material water is opened to allow passage of high-concentration residual effective chlorine aqueous solution. 13. A mechanism for making it impossible to pass a high-concentration residual effective chlorine aqueous solution by closing the water pressure automatic on-off valve for raw material water when a change in water pressure when the on-off valve is opened to closed is detected. The residual effective chlorine containing water manufacturing apparatus of any one of -21.

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