JP4500071B2 - Dialysis equipment cleaning, disinfection wastewater neutralization treatment equipment - Google Patents

Description

  TECHNICAL FIELD The present invention relates to cleaning that is inclined toward acidity or alkalinity in dialysis wastewater, cleaning of dialysis equipment that neutralizes disinfecting waste liquid, and neutralizing treatment apparatus for disinfecting waste liquid.

  In hospitals, clinics, and the like where artificial dialysis is performed, after dialysis is completed, dialysis equipment is sterilized and cleaned through processes such as water washing, acid washing, water washing, drug washing, and water washing. Acid cleaning water such as acetic acid is used for the acid cleaning, and alkaline cleaning water such as sodium hypochlorite is used for the chemical cleaning. Along with this, waste liquid inclined to alkaline (acidic) and waste liquid inclined to acidic (alkaline) are discharged. Since both waste liquids do not fall within the water quality standards, they will be neutralized before being discharged into the sewer. Several apparatuses for neutralizing the dialysis machine washing and disinfecting waste liquid have been proposed so far (see, for example, Patent Documents 1 and 2).

          JP 2001-269670 A (page 1-4)           Japanese Patent Laid-Open No. 5-38495 (page 1-3)

However, Japanese Patent Laid-Open No. 2001-269670 (Prior Art 1) is filled with natural rock particles mainly composed of calcium carbonate in an acid neutralization tank, so the neutralization reaction is slow, and a large amount of natural rock particles are filled. Had to do. And since natural rock particles were used, black acupuncture appeared when neutralization proceeded, so it had to be removed. Moreover, about the alkaline waste liquid of sodium hypochlorite aqueous solution, only the tap water was added and the process was not made especially.
In contrast, Japanese Patent Laid-Open No. 5-38495 (prior art 2) proposes an invention in which a reducing agent is added to hospital wastewater containing a chlorine-based oxidizing agent such as sodium hypochlorite. However, Conventional Technique 2 requires a reducing agent such as a sodium sulfite solution separately to purify the sodium hypochlorite-containing waste liquid.
In addition, the conventional dialysis machine cleaning and disinfecting waste liquid neutralization treatment apparatus sometimes has problems because the storage tank for receiving the alkaline waste liquid and the storage tank for receiving the acidic waste liquid are the same. Since alkaline waste liquid such as sodium hypochlorite generates acidic and toxic chlorine gas, alkaline waste liquid such as sodium hypochlorite is introduced into the storage tank containing the acidic waste liquid, or conversely hypochlorous acid. In some cases, the acidic waste liquid may flow into the storage tank containing the alkaline waste liquid such as sodium.

  The present invention solves the above-mentioned problems. Dialysis wastewater that is inclined toward acidity or alkalinity in dialysis wastewater can be individually and safely neutralized and treated at low cost. An object is to provide a neutralization treatment device for cleaning equipment and disinfecting waste liquid.

In order to achieve the above-mentioned object, the gist of the invention described in claim 1 is that an acidic storage tank dedicated to an acidic waste liquid that accepts an acidic waste liquid generated by disinfection and washing after dialysis is completed, and is alkaline when dissolved in water. granules anda acid neutralization tank filled in the bath, an acidic waste liquid accumulated in said acidic liquid reservoir with liquid feed neutralizing process to be in the acid neutralization tank, after completion of the dialysis In addition, an alkaline storage tank dedicated to alkaline waste liquid that receives the alkaline waste liquid generated by disinfection and washing of the liquid is further provided to neutralize the alkaline waste liquid , and the waste liquid generated by disinfection and washing after the completion of dialysis Three lines of piping branching into a pipe for transferring to the acidic storage tank, a pipe for transferring to the alkaline storage tank, and a general discharge pipe for transferring to the general sewer, and the waste liquid is sent to each of these three lines. Switchable to allow liquid And replacement valve, cleaning of the dialysis apparatus, characterized by comprising a control panel to open and close control of the said switching valve is in the neutralization apparatus disinfecting waste.
The neutralization treatment apparatus for washing and disinfecting waste liquid for dialysis equipment according to claim 2 is the neutralizing apparatus for waste liquid according to claim 1, comprising an air bubbling generator in an alkaline liquid storage tank, and comprising a sodium hypochlorite-containing waste liquid. It is characterized in that the alkaline waste liquid is neutralized by air bubbling.

(Function)
As in the first aspect of the present invention, an acid storage tank dedicated to the acidic waste liquid that receives the acidic waste liquid generated by disinfection and washing after dialysis is completed, and an acid filled with granular materials that dissolve in water and exhibit alkali. A neutralization tank, and when the acid waste liquid stored in the acid storage tank is fed to the acid neutralization tank and neutralized, it is acidic among the waste liquid generated by disinfection and washing after dialysis. Since only the waste liquid is processed individually, the amount of the waste liquid is reduced and the waste liquid can be processed efficiently. In addition, when the acid storage tank dedicated to acidic waste liquid and the acid neutralization tank that is dissolved in water and presents alkali are filled in the tank, it is discharged only within a limited time of the day. The acidic waste liquid that is not used can be once stored in the acidic liquid storage tank, and gradually flowed to the acid neutralization tank until the next acidic waste liquid is discharged, so that it can be effectively and reliably treated using the time zone. Moreover, the neutralization apparatus which processes an acidic waste liquid can be compactized by taking such a structure.
Dialysis after completion of disinfection, the alkaline waste solution only alkaline reservoir of accepting the alkaline waste liquid generated by washing further comprising, when so as to neutralize the alkaline liquid waste, waste liquid generated disinfected after completion of the dialysis, in washing Among them, not only acidic waste liquid but also alkaline waste liquid can be individually treated, and troubles such as introduction of alkaline waste liquid such as sodium hypochlorite into the storage tank containing the acidic waste liquid are solved. And since alkaline waste liquids, such as sodium hypochlorite, can be detoxified, it is not necessary to kill microorganisms or put a burden on the discharged sewer.
Three systems of pipes that branch into a pipe for transferring waste liquid generated by disinfection and washing after dialysis to an acidic storage tank, a pipe for transferring to an alkaline storage tank, and a general discharge pipe for transferring to a general sewer. In addition, a switching valve that can be switched so that the waste liquid can be fed to each of these three pipes, and a control panel that controls the opening and closing of the switching valve, the waste liquid generated by disinfection and washing after the completion of dialysis, It is possible to lead acidic waste liquid to the neutralization treatment equipment for acidic waste liquid, alkaline waste liquid to the neutralization treatment equipment for alkaline waste liquid, and discharge waste water that does not require neutralization treatment to the sewerage facility as it is. Thus, only the waste liquid that needs neutralization can be selectively treated, and an efficient and economical neutralization apparatus can be obtained without waste.
As in the second aspect of the present invention, when an alkaline liquid storage tank is equipped with an air bubbling generator and the alkaline waste liquid composed of sodium hypochlorite-containing waste liquid is neutralized by air bubbling, no chemical is used. In addition, the neutralization treatment can be performed, and the operation cost is hardly required and the apparatus is environmentally friendly.

  The neutralization treatment apparatus for cleaning and disinfecting waste liquid of the dialysis machine of the present invention can neutralize the cleaning and disinfecting waste liquid that is inclined to acidity or alkalinity in dialysis waste water individually and efficiently. The device is more compact and the operation cost is reduced.

  Hereinafter, an embodiment of a neutralization treatment apparatus for washing and disinfecting waste liquid for dialysis equipment according to the present invention will be described in detail. FIG. 1 is a schematic plan view of a neutralization treatment apparatus for cleaning and disinfecting waste liquid of dialysis equipment, FIG. 2 is a partial longitudinal cross-sectional explanatory view of the neutralization treatment apparatus for alkaline waste liquid, and FIG. FIG. 4 is an explanatory perspective view, and FIG. 4 is a partial vertical cross-sectional explanatory view of an acidic waste liquid neutralizing apparatus.

The neutralization treatment apparatus (hereinafter simply referred to as “neutralization treatment apparatus”) for cleaning and disinfecting waste liquid of the dialysis apparatus of the present embodiment is referred to as neutralization treatment apparatus 1 for acidic waste liquid XL (hereinafter referred to as “acid neutralization apparatus”). And a neutralization treatment device for alkaline waste liquid YL (hereinafter referred to as “alkaline neutralization device”). Here, by integrating the components serving acidic reservoir 1 and an acid neutralization tank 2 and treated water receptacle 3 acidic neutralizer A, and further added with reinforcing standing portion f ₂ the reinforcement bottom plate portion f ₁ to box-shaped container _{A 1} Te. Also, the alkaline liquid storage tank 6 and the treated water receptacle 3 which are constituent elements of the alkaline neutralizer B are integrated, and a reinforcing upright plate portion f ₂ and a reinforcing bottom plate portion f ₁ are added to form a box-shaped container B ₁ . . In addition, compact neutralization treatment apparatus is integrated into a box-shaped container of one box-type share a junction box-shaped container A ₁ and the box-shaped container B _1. The box-shaped containers A ₁ and B ₁ are appropriately covered with an upper lid (not shown).

(1) Acid Neutralizer An acid neutralizer A is an acid storage tank 1, an acid neutralizer 2, a treated water receptacle 3, and a granular material that dissolves in water and exhibits alkali (hereinafter referred to as "neutralizer"). And a water supply 5 (FIGS. 1 and 4).

The acidic storage tank 1 is a tank for exclusive use of an acidic waste liquid having a standing plate portion 10 and a bottom plate portion 11 and forming a receiving tank having an upper surface opening. For example, the acidic waste liquid XL for one day generated by disinfection and washing after dialysis is obtained. Has enough capacity to accept. Here, the box-shaped container A ₁ is defined as an acid storage tank 1 formed into compartments, and the height of the shared upright plate portion 10 (20) on the side of the acid neutralization tank 2 disposed adjacently is set to be one step lower than the other portions. . As shown in FIG. 4, when the liquid level XL ₁ of the acidic waste liquid XL exceeds the level of the vertical plate portion 10, the acidic waste liquid XL flows out from the acidic storage tank 1 to the acid neutralization tank 2. It is to do. The bottom plate portion 11 of the acidic liquid storage tank 1 is provided with an opening XP ₀ of the acidic waste liquid branch pipe XP that guides the acidic waste liquid XL to the acidic liquid storage tank 1 out of the waste liquid generated by disinfection and washing after dialysis. FIG. 1). The opening tip of the acidic waste liquid branch pipe XP protrudes slightly upward from the bottom plate 11.

The acid neutralization tank 2 is a container provided with a standing plate portion 20, a bottom plate portion 21, a partition plate 23, a partition plate 24, and upper and lower mesh bodies 25 and 26. Here acid neutralization tank 2 in a top opening containers made with standing portion 20 and the bottom plate portion 21 to partition forming a box-shaped container A _1. As shown in FIG. 4, the acid-neutralizing tank 2 divides the upper surface opening container into two parts on the left and right with a partition plate 23, and further divides the inside of the divided tank into two partition plates 24. The lower edge of the partition plate 24 and the bottom plate portion 21 are separated by a necessary length, and as shown in FIG. 4, the partition plate 24, the partition plate 23, the partition plate 24, the right side from the left standing plate portion 20 to the right. A step is provided to the vertical plate portion 20 so that the upper edge thereof is lowered to the right. In the preferred acid neutralization tank 2 in which the entire tank is divided into four chambers, for example, when the acidic waste liquid XL in the acidic liquid storage tank 1 becomes full and overflows, the left vertical plate 20 (10 The acidic waste liquid XL that has climbed over the upper edge and entered the first chamber due to overflow from the acidic storage tank 1 first flows down, then goes down the partition plate 24 and ascends in the second chamber. Subsequently, the acidic waste liquid XL gets over the weir of the partition plate 23, enters the third chamber and flows down, and then goes down the partition plate 24 and ascends the fourth chamber. It flows over the weir of the standing plate portion 20 and flows out to the treated water receiver 3. In the vicinity of the lower edges of both the partition plates 24, a lower mesh member 25 is disposed horizontally across the flow path of each chamber, and the neutralizer 4 is filled on the mesh member 25. Thus, the acid neutralization tank 2 is a treatment tank that neutralizes the acidic waste liquid XL fed from the acidic storage tank 1 by being charged with a predetermined amount of the neutralizing agent 4. Here, the upper mesh body 26 is also put on the neutralizing agent 4 filled on the lower mesh body 25 so that the neutralizing agent 4 does not flow out carelessly.
The net-like body 25 holds the neutralizing agent 4 filled in the acid neutralization tank 2 and allows liquid to pass through. The net-like body here is a concept including a perforated plate, a flaw and the like in addition to the net. Used in. In this embodiment, a net is used for the net-like body 25, and the net is located above the bottom plate portion 21 in the four cylindrical portions (four chambers) formed by the standing plate portion 20, the partition plate 23, or the partition plate 24. It is stretched horizontally near the lower edge of the partition plate 24.

The treated water receptacle 3 is an intermediary receptacle that receives the treated water treated with the acid waste liquid XL in the acid neutralization tank 2 and guides the treated water to the treated water piping XSP of the acidic waste liquid. The treated water receptacle 3 is a cone funnel, and is disposed adjacent to the downstream side of the acid neutralization tank 2 (on the right side of the acid neutralization tank 2 in FIG. 4). It is brought into contact to the outer wall of the downstream side of the upright plate portion 20 of the upper edge of the treated water receptacle 3 into acid neutralization tank 2, abutting the inner wall of the reinforcement vertical plate portions f ₂ to form a box-shaped container A ₁ The treated water flowing out from the acid neutralization tank 2 is surely captured. The lower part of the treated water receptacle 3 is connected to the treated waste water pipe XSP of the acidic waste liquid, and the acidic waste liquid XL taken from the acidic waste liquid branch pipe XP passes through the acidic storage tank 1, the acid neutralization tank 2, and the treated water receptacle 3. Then, it is sent to the treated water pipe XSP.

  The neutralizing agent 4 is a granular material that dissolves in water and exhibits an alkali. In the present embodiment, a granular material containing magnesium hydroxide or magnesium oxide as a main component is used, and more specifically, a magnesium hydroxide granular material having a particle diameter of 3 mm to 5 mm obtained by seawater method magnesium hydroxide or a predetermined temperature. Calcinated magnesium oxide is used. Specifically, magnesium hydroxide granular material 4a manufactured by Ube Materials Co., Ltd. is used. Seawater magnesium hydroxide is produced by adding slaked lime milk to decarbonated seawater, but the magnesium hydroxide becomes colloidal and difficult to settle and wash. Thus, magnesium hydroxide with good sedimentation and filterability can be obtained ”(“ Chemical Products of 13398 ”, Chemical Industry Daily, page 165, 1998). No ak or the like is produced during the sum treatment, and the particle size thereof is moderate and excellent in handling.

The water supply tool 5 is an instrument for feeding water into the acidic storage tank 1. Here, a connection pipe 51 connected to the water pipe, a water control computer 52 and an introduction pipe 53 for introducing the tap water into the acidic liquid storage tank 1 are provided.
In this embodiment, a watering computer 52 for horticulture is used as the water control computer. An appropriate time can be selected using the irrigation computer 52 and intermittent operation can be performed. The leading end of the introduction pipe 53 is arranged near the acid neutralization tank 2 in the acidic liquid storage tank 1, and the tip nozzle 531 is installed near the bottom plate 21 with the nozzle opening facing the introduction side of the acidic waste liquid branch pipe XP. (FIGS. 1 and 4). Tap water controlled by the irrigation computer 52 is intermittently ejected from the tip nozzle 531. The acidic waste liquid XL accumulated in the acidic liquid storage tank 1 is circulated using the water pressure of the tap water, and the acidic waste liquid XL is sequentially passed over the vertical plate portion 10 from the acidic liquid storage tank 1 to overflow (overflow) ) To be discharged to the acid neutralization tank 2.

(2) Alkaline neutralizer Next, the alkaline neutralizer B will be described in detail. The alkaline neutralizer B includes an alkaline liquid storage tank 6, a treated water receiver 7, an air bubbling supply tool 8, and a water supply tool 9.

The alkaline storage tank 6 is an alkaline waste liquid dedicated tank having a top plate portion 60 and a bottom plate portion 61 and forming a box-type receiving tank with an open top surface. For example, alkaline waste liquid for one day generated by disinfection and washing after dialysis is completed. Has enough capacity to accept YL. Here, the alkaline liquid storage tank 6 is a receiving tank in which all of the remainder of the box-shaped container B1 after the box-shaped container B1 is partitioned and partially allocated for the treated water receptacle 7 is provided. The height of the standing plate portion 60 on the side of the treated water receiver 7 that is disposed adjacently is set to be one step lower than the other portions. The flow of the alkaline waste liquid YL from the alkaline liquid storage tank 6 to the treated water receptacle 7 overflows and flows out when the level YL1 of the alkaline waste liquid YL exceeds the level of the vertical plate portion 60 as shown in FIG. I am doing so.
The bottom plate portion 61 of the alkaline liquid storage tank 6 is provided with an opening YP0 of the alkaline waste liquid branch pipe YP that guides the alkaline waste liquid YL to the alkaline liquid storage tank 6 out of the waste liquid generated by disinfection and washing after dialysis. The opening front end portion of the alkaline waste liquid branch pipe YP protrudes slightly upward from the bottom plate portion 61. As shown in FIGS. 1 and 2, the opening YP0 is provided in the bottom plate portion 61 near the standing plate portion 60 on the alkaline waste liquid branch pipe YP side.
On the other hand, a partition plate 64 stands up in the alkaline liquid storage tank 6 near the standing plate portion 60 on the treated water receiver 7 side to divide the inside of the tank. The alkaline storage tank 6 is divided into a treatment body 6a where the alkaline waste liquid YL is neutralized by air bubbling and a treated portion 6b where the neutralized treated water separated by the partition plate 64 is temporarily stored. It is done. When the alkaline waste liquid YL in the alkaline liquid storage tank 6 is neutralized and the treated water is pushed to the treated water receptacle 7 by the water supply tool 9, the treated water and tap water can be efficiently replaced and washed away. Because it can. The lower edge of the partition plate 64 and the bottom plate portion 61 are separated by a necessary length, and the upper edge of the partition plate 64 is the upper edge of the standing plate portion 60 that is a boundary with the treated water receptacle 7 as shown in FIG. It protrudes further upward.
And it is set as the structure by which the air bubbling generator 82 mentioned later for details is installed in the tank (especially in the process main-body part 6a) of the alkaline liquid storage tank 6. FIG. The alkaline liquid storage tank 6 is a treatment tank that can neutralize alkaline waste liquid YL such as sodium hypochlorite by generating bubbles g from the air bubbling generator.

The treated water receptacle 7 is a mediator receptacle that receives treated water obtained by neutralizing the alkaline waste liquid YL in the alkaline storage tank 6 and guides the treated water to the treated water pipe YSP of the alkaline waste liquid. The treated water receptacle 7 is a cone-shaped funnel similar to the treated water receptacle 3 provided in the acid neutralizer A, and is located downstream of the alkaline reservoir 6 (on the right side of the alkaline reservoir 6 in FIG. 2). Adjacent to each other. The upper edge of the treated water receptacle 7 is brought into contact with the outer wall of the downstream standing plate portion 60 of the alkaline liquid storage tank 6 and is brought into contact with the reinforcing standing plate portion f2 forming the box-shaped container B1 so as to be alkaline. The treated water flowing out from the liquid storage tank 6 is reliably captured. The lower part of the treated water receptacle 7 is connected to a treated water pipe YSP for alkaline waste liquid, and the alkaline waste liquid YL taken in from the alkaline waste liquid branch pipe YP passes through the alkaline storage tank 6 and treated water receptacle 7 to the treated water pipe. It is sent to YSP.

The air bubbling supply tool 8 includes an air pump 80, an air supply pipe 81, and an air bubbling generator 82. The air pump 80 is connected to an air bubbling generator 82 installed in a tank near the bottom plate portion 61 of the alkaline liquid storage tank 6 through an air supply pipe 81. The air bubbling generator 82 of this embodiment is one in which a large number of small through holes 821 are formed in a loop pipe as shown in FIGS. The air pipe 81 is connected to the loop pipe, and the air taken in from the air pump 80 rises as countless bubbles g from the through-holes 821, that is, countlessly in the alkaline waste liquid YL accumulated in the alkaline storage tank 6. The bubble g rises so that the alkaline waste liquid YL can be neutralized. Most of the air bubbling generator 82 of the present embodiment is horizontally arranged in the region of the processing main body 6a, but a part thereof extends to the processed portion 6b. This is because the alkaline waste liquid YL once stored in the alkaline liquid storage tank 6 is more effective if it is neutralized by air bubbling without first treating the processing body 6a and the processed part 6b.
The air pump 80 can correspond to the program signal of the dialysate supply device TK, but may be operated all day.

By the way, the alkaline waste liquid YL generated by disinfection and washing after completion of dialysis is often an alkaline waste liquid YL such as an aqueous sodium hypochlorite solution. The present inventor has earnestly studied whether there is a method capable of neutralizing the alkaline waste liquid YL composed of this sodium hypochlorite-containing waste liquid without using a chemical, and an air bubbling generator in the alkaline storage tank 6. It has been found that neutralization can be carried out relatively easily and in a few hours without causing any practical problems by providing 82 and air bubbling. The reason why the alkaline waste liquid YL such as sodium hypochlorite can be neutralized by air bubbling is not clear, but the following is assumed, for example.
Sodium hypochlorite is said to change over time due to temperature and direct sunlight, but even if air bubbling takes time (specifically 3 hours or more), sodium hypochlorite decomposes and its alkaline waste liquid YL It is considered that the pH value of Alternatively, in the air bubbling process, components present in the air are considered to act on sodium hypochlorite to lower the pH value. In any case, it has been experimentally confirmed that the pH value of the alkaline waste liquid YL composed of the sodium hypochlorite-containing waste liquid is lowered only by taking several hours as an air bubbling treatment time, which is not a practical problem.

The water supply tool 9 is an instrument that feeds water into the alkaline liquid storage tank 6. Here, similarly to the water supply tool 5 of the acid neutralizer A, the connection pipe 91 is connected to a water pipe, a water control computer 92 and an introduction pipe 93 for introducing tap water into the acidic liquid storage tank 1. .
An irrigation computer 92 is employed as the water control computer, and intermittent operation is performed by selecting an appropriate time with the irrigation computer 92. The leading end of the introduction pipe 93 is disposed in the processing main body 6a near the partition plate 64 in the alkaline liquid storage tank 6, and the tip nozzle 931 near the bottom plate 61 has a nozzle opening on the introduction side of the alkaline waste liquid branch pipe YP. Installed. Controlled by the irrigation computer 92, tap water is intermittently ejected from the tip nozzle 931. Utilizing the water pressure of the tap water, the treated water after the neutralization treatment of the alkaline waste liquid YL is circulated in the treatment main body 6a (alkaline storage tank 6), and the treated water is sequentially hidden through the partition plate 64. It can be sent to the wastewater treatment part, and then it can get over the weir of the upright plate part 60 from the treated part 6b, overflow and flow out to the treated water receptacle 7.

(3) Peripheral equipment of the neutralization treatment apparatus In this neutralization treatment equipment, the waste liquid generated by disinfection and washing after dialysis as peripheral equipment is transferred to the acidic storage tank 1 and the alkaline storage tank 6. Three lines of piping branched into a pipe YP to be transferred and a general outlet pipe MP ₂ to be transferred to a general sewer, and switching valves XV, YV, which can be switched so that the waste liquid can be fed to each of these three lines. An MV and a control panel CP that controls opening and closing of the switching valve are provided.

In this embodiment, the acidic waste liquid branch pipe XP of the branch pipe branches from the main waste liquid main pipe MP ₁ carrying the waste liquid generated by disinfection and washing after dialysis, and the tip of the acidic waste liquid branch pipe XP is the acidic liquid storage tank 1. The electromagnetic valve XV is incorporated in the middle of the acidic waste liquid branch pipe XP.
Also, branches alkaline waste liquid branch pipe YP of the lateral pipe from the main effluent mains MP _1, but the tip of the alkaline waste liquid branch pipe YP are connected to an alkaline reservoir 6, in the middle of the alkaline waste liquid branch pipe YP is A solenoid valve YV is incorporated.
Alkaline waste branch pipe YP to the main waste liquid main pipe MP _1, main solenoid valve MV is incorporated in downstream locations past the junction of the acidic waste liquid branch pipe XP. Generally discharge pipe MP ₂ is connected to the downstream side of the solenoid valve MV for the main tube, ahead it leads to generally sewer.

The control panel CP detects the dialysis program setting data of the dialysate supply device TK, opens and closes each solenoid valve, and guides the acidic waste liquid XL to the acidic storage tank 1 out of the waste liquid generated by disinfection and washing after dialysis. , alkaline waste YL lead to an alkaline storage tank 6. the rinsing waste water is a controller lead to general discharge pipe MP _2. For example, when the acidic waste liquid XL flows through the main waste liquid main pipe MP ₁ by acid cleaning, the electromagnetic valves YV and MV are closed and the electromagnetic valve XV is opened to guide the acidic waste liquid XL to the acidic storage tank 1. . If alkaline waste YL by chemical washing of sodium hypochlorite or the like flows through the main waste main pipe MP _1, the solenoid valve XV, MV is closed, alkaline the alkaline waste YL become solenoid valve YV is open reservoir Guide to tank 6. When flowing through the main waste present tract washing wastewater by RO water washing or the like, an electromagnetic valve YV, XV is closed, so the solenoid valve MV is opened leads the washing water discharge into the general discharge pipe MP _2.

(4) Dialysis equipment cleaning and disinfection waste solution neutralization method The neutralization treatment method can be performed, for example, in the following manner using the above neutralization apparatus.
First, among waste liquids during dialysis, and dialysis equipment cleaning and disinfecting waste liquids, for example, water drainage in the process of water washing, acid washing, water washing, chemical washing, and water washing has a pH value within the water quality standard. Discharge directly into the sewer without taking it into the neutralizer. At this time, the switching valves XV and YV are closed and the switching valve MV is open.

  During the time period when the acidic waste liquid XL is discharged, the control panel CP receives a signal command from the dialysate supply device TK, opens the electromagnetic valve XV, and closes the electromagnetic valves YV and MV. The acid neutralizer A is entered from the main drain main pipe through the acidic waste liquid branch pipe XP (broken line arrow in FIG. 4).

  Further, the control panel CP follows the dialysis program setting of the dialysate supply device TK, and during the time period when the alkaline waste liquid YL is discharged, the solenoid valve YV is opened and the solenoid valves XV and MV are closed, so that the alkaline waste liquid YL is allowed to enter the alkaline neutralizer B from the main drainage main pipe through the alkaline waste liquid branch pipe YP (broken arrow in FIG. 2).

The acidic waste liquid XL that has entered the acidic neutralizer A is first temporarily stored in the acidic liquid storage tank 1. The storage amount of the acidic liquid storage tank 1 is determined by the number of dialysis machines, the disinfection time, and the cleaning time.
The acidic waste liquid XL in the acidic liquid storage tank 1 is sequentially sent to the acid neutralization tank 2 by the ejection of water from the water supply tool 5 set as a timer. Using the water pressure of tap water from the tip nozzle 531, the acidic waste liquid XL accumulated in the acidic liquid storage tank 1 is circulated and sent out to the acid neutralization tank 2. The acidic waste liquid XL that has entered the acid neutralization tank 2 passes through the packed bed filled with the solid neutralizing agent 4 made of particulate matter 4a such as magnesium hydroxide. And while acidic waste liquid XL passes the packed bed of the acid neutralization tank 2, pH value falls by solid-liquid neutralization reaction of acidic waste liquid XL and the neutralizing agent 4. FIG. Treated water whose pH value is adjusted within the discharge standard value such as the sewerage method while passing through the filling layers in the four cylinder portions (four chambers) formed by the standing plate portion 20, the partition plate 23 or the partition plate 24 It becomes.
Subsequently, when the amount of tap water is added, the treated water gets over the weir of the standing plate 20 with the treated water receiver 3 and is washed away to the treated water receiver 3. Then, it is discharged by being mixed with other waste water discharged during dialysis via the acidic treated water pipe XSP.

On the other hand, the alkaline waste liquid YL that has entered the alkaline neutralizer B is first temporarily stored in the alkaline storage tank 6. The amount of storage in the alkaline liquid storage tank 6 is also determined by the number of dialysis machines, disinfection time, and cleaning time. For example, about 30 tons of washing and disinfecting waste liquid for dialysis equipment related to artificial dialysis in a hospital with about 30 beds, half of which is alkaline waste water.
When the alkaline waste liquid YL is stored in the alkaline liquid storage tank 6, the air pump 80 is operated to decompose sodium hypochlorite in the alkaline waste liquid YL over time with the bubbles g from the air bubbling generator 82, and the alkaline waste liquid. The pH value of YL is lowered so that it falls within the standard value defined by the Sewerage Law. The air pump 80 may be always operated.
The treated water of the alkaline waste liquid YL treated over several hours in this way is treated by, for example, sequentially diving through the treatment main body 6a by the ejection of water from the water supply tool 9 set in the dialysis time zone on the next day. It is sent to the finished portion 6 b, and further gets over the weir of the standing plate 60 with the treated water receptacle 7 and is washed away to the treated water receptacle 7. After that, it is discharged through the alkaline treated water pipe YSP, for example, mixed with other waste water discharged during dialysis on the next day.

(5) Example [Example 1]
Acidic waste liquid neutralization test As shown in FIG. 4, a 1500 mm × 300 mm × 900 mm stainless steel box A ₁ 370 mm × 300 mm × 700 mm acidic storage tank 1 separated by a standing plate portion, and 300 mm × An acid neutralizer A comprising an acid neutralization tank 2 divided into 300 mm × 650 mm and 300 mm × 300 mm × 600 mm was used. A granular material mainly composed of magnesium hydroxide or magnesium oxide and having a particle diameter of 3 mm to 5 mm is selected and used as a neutralizing agent 4. The neutralizing agent 4 is divided into 90 kg and 80 kg. The acid neutralization apparatus A was completed by filling the mesh body 25 of the acid neutralization tank 2.
Then, the acid storage tank 1 and the acid neutralization tank 2 were filled with a 1% acetic acid solution. The same 1% acetic acid solution was then flowed into the acidic reservoir at 5000 ml / min. The pH value of the 1% acetic acid solution used was 2.8. The pH value of the acidic waste liquid XL that passed through the acid neutralization tank 2 was 5.3, and a neutralizing action and an effect were obtained.

[Example 2]
-Neutralization test of alkaline waste liquid An alkaline neutralizer B as shown in FIG. 2 was used. Air is sent from the air pump 80 to the air bubbling generator 82 through the air supply pipe 81 to the 500 mm × 300 mm × 500 mm stainless alkaline storage tank 6 to release (aerate) the bubbles g from a large number of small through holes 821. The neutralization test of the alkaline waste liquid YL was performed. The weather conditions were an air temperature of 8 ° C and a water temperature of 5 ° C. An air pump 80 having a discharge air volume of 40 liters / minute was used. Alkaline reservoir 6 was filled with a 01% sodium hypochlorite solution. The pH value before aeration was 11.7. When aeration was carried out for 3 hours, the pH value was 8.2 to 8.4, and a neutralizing action and effect were obtained.

(5) Effects of the present embodiment The neutralization apparatus configured as described above is a wastewater produced by sterilization and cleaning of a dialysis device that undergoes, for example, water washing, acid washing, chemical washing, and water washing after completion of dialysis. Among them, the acid waste liquid XL produced by acid washing is taken into the acid neutralizer A and neutralized, and the alkaline waste liquid YL such as sodium hypochlorite produced by chemical washing is taken into the alkaline neutralizer B and neutralized. By doing so, the amount of wastewater treated can be reduced, and acid and alkali can be individually treated, so that an efficient and effective neutralization treatment can be performed.

  Sodium hypochlorite is highly toxic and may kill microorganisms. However, since sodium hypochlorite is decomposed and the alkaline waste liquid YL is neutralized and detoxified, such a worry is eliminated. Further, since the alkaline waste liquid YL is treated with the air bubbling generator 82, that is, with the air bubbles g, the alkaline neutralizer B (neutralizer) is free of chemicals and is low in cost and friendly to the environment. Become. Since the alkaline waste liquid YL such as sodium hypochlorite is individually treated by being guided to the alkaline neutralizer B, it is possible to avoid the occurrence of harmful gases such as chlorine by mixing with the acidic waste liquid XL, and safety is ensured. .

Then, flush wastewater having no problem in pH value is discharged into the general sewer as it is, and for example, the acid storage tank 1 and the alkaline storage tank 6 for storing a day's worth become relatively small in volume, and the neutralization apparatus is installed. Space can be reduced. Even in hospitals where it has been difficult to secure the installation location so far, it is easy to introduce the neutralization treatment equipment. In addition, since the neutralization apparatus is made compact by integrating the box-shaped containers A ₁ and B ₁ in this embodiment, the installation space is further reduced and the apparatus is excellent.

  Moreover, in the acidic processing apparatus A, since the said granular material 4a which melt | dissolves in water in the neutralizing agent 4 and exhibits an alkali uses the granular material which has magnesium hydroxide or magnesium oxide as a main component, natural rock Compared with particles and the like, the neutralization reaction is fast, and the amount to be filled in the acid neutralization tank 2 is small. Furthermore, when the neutralizing agent 4 made of seawater-processed magnesium hydroxide is used, the particles can be enlarged to obtain a neutralizing agent containing magnesium hydroxide as a main component with good sedimentation and filterability. It is excellent in workability and handling because it is free from agitation and has an appropriate particle size.

The present invention is not limited to those shown in the above-described embodiments and examples, and various modifications can be made within the scope of the present invention depending on the purpose and application. Acid neutralizer A, acid storage tank 1, acid neutralization tank 2, treated water receptacle 3, neutralizer 4, water supply tool 5, alkaline neutralizer B, alkaline storage tank 6, treated water receptacle 7. The shape, size, material and the like of the air bubbling generator 82, the water supply tool 9 and the like can be appropriately selected within the scope of the present invention according to the application. For example, it may be a very small neutralizing apparatus which each bed pair for each bed dialysis treatment.

  1 is a schematic plan view of one embodiment of a neutralization treatment apparatus for cleaning and disinfecting waste liquid for dialysis equipment according to the present invention.   It is a partial longitudinal cross-section explanatory drawing which concerns on the neutralization processing apparatus of alkaline waste liquid.   FIG. 3 is an explanatory perspective view of the air bubbling supply tool of FIG. 2.   It is a partial longitudinal cross-section explanatory drawing which concerns on the neutralization processing apparatus of an acidic waste liquid.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Acid storage tank 2 Acid neutralization tank 4 Neutralizing agent (The granular material which melt | dissolves in water and exhibits an alkali)
6 Alkaline liquid storage tank 82 Air bubbling generator CP Control panel XL Acid waste liquid YL Alkaline waste liquid XV Solenoid valve (switching valve)
YV solenoid valve (switching valve)
MV solenoid valve (switching valve)
XP Acid waste liquid branch pipe (pipe)
YP Alkaline waste liquid branch pipe (pipe)
MP ₂ general discharge pipe

Claims (2)

An acid storage tank dedicated to the acidic waste liquid that receives the acidic waste liquid generated by sterilization and washing after dialysis is completed, and an acid neutralization tank that is filled with granular material that dissolves in water and exhibits alkalinity. , wherein the acidic liquid storage tank to the reservoir and the acidic effluent with to a liquid feed for neutralization in the acid neutralization tank, disinfection after completion of the dialysis, alkaline waste only alkaline reservoir accept alkaline waste liquid generated by washing A pipe for further neutralizing the alkaline waste liquid and transferring the waste liquid generated by disinfection and washing after dialysis to the acidic storage tank and to the alkaline storage tank. And a general discharge pipe that transfers to the general sewer, a three-way pipe, a switching valve that can be switched so that the waste liquid can be sent to each of the three pipes, and a control that controls the opening and closing of the switching valve and the board, the Cleaning of the dialysis apparatus, characterized by Bei, neutralizing apparatus disinfecting waste. Comprising air bubbling generator to the alkaline liquid storage tank, cleaning of the dialysis apparatus according to claim 1, wherein which is adapted to neutralization treatment the alkaline waste liquid consisting of sodium-containing waste liquid hypochlorite is air bubbling, disinfecting waste Neutralization treatment equipment.

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