JP2013010066A - Water treatment system - Google Patents

Abstract

When a computing unit starts or stops an auxiliary water treatment apparatus based on a measurement value measured by a water quality meter, a predetermined setting value set in the computing unit is set without depending on the experience of the operator. In addition, the water treatment device can be started or stopped in a timely manner when the quality of the supplied raw water changes, and the operation status of the main body water treatment device can be monitored without using the measured value of the water quality meter. Provide a water treatment system that can.
An auxiliary water treatment device 50 is activated by a computing unit 40 based on a measured value of treated water obtained by treating a part of the supplied raw water with a control water treatment device 10 and a predetermined set value set in advance. Alternatively, the auxiliary water treatment device 50 is started or stopped by the calculator 40 based on the measured value of the inflow pressure flowing into the control water treatment device 10.
[Selection] Figure 1

Description

  The present invention activates an auxiliary water treatment device together with the main body water treatment device when the raw water supply includes a removal target that is difficult to remove by the main body water treatment device alone, or when the supply water quality load to the main body water treatment device is large. It relates to a water treatment system.

  Water quality to the main body water treatment device when it is judged that the removal target that is difficult to remove by the main body water treatment device alone is included in the feed raw water due to fluctuations in water quality such as rainfall, etc. When it is determined that the load is large, the removal target is mixed into the treated water. In order to prevent this, a system is known in which an auxiliary water treatment device that assists the main body water treatment device is installed and started together with the main body water treatment device (see Patent Document 1 below).

  A conventional water treatment system shown in FIG. 4 is known. The water treatment system 101 continuously feeds the total amount of raw raw water to the main body water treatment device 111 and the auxiliary water treatment device 112.

  Since this water treatment system 101 continuously feeds the supplied raw water to the main body water treatment device 111 and the auxiliary water treatment device 112, it is possible to always obtain stable treated water quality. However, since the treated water treated by the main body water treatment device 112 that does not need to be treated by the auxiliary water treatment device 112 is also passed, the frequency of complicated washing performed for the incident water treatment device 112 increases, There was a problem that the replacement frequency of the filter medium, the filler, and the adsorbent of the processing device 112 increased.

  Another conventional water treatment system shown in FIG. 5 is known. The water treatment system 201 measures the raw feed water before being treated by the main body water treatment device 111 with the feed raw water quality meter 121, and the calculated values obtained by sequentially processing the measured values with the calculator 122 are When the predetermined set value set in the arithmetic unit 122 is exceeded, the auxiliary water treatment device 112 installed in the treated water main connected to the main body water treatment device 111 is started, The treated water treated by the treatment device 111 is further treated.

  Since this water treatment system 201 measures the feed raw water with the feed raw water quality meter 121, it is easy to make a judgment when starting and stopping the auxiliary water treatment device 112 in response to the change in the quality of the feed raw water. Can be done. However, since the measured value of the feed raw water measured by the feed raw water quality meter 121 is used, it is necessary to perform the predetermined set value set in the calculator 122 for each water treatment plant or treatment plant having different water quality, This work relies heavily on the accumulation and experience of a large amount of data, and it was difficult to secure workers even today, and it was predicted that it would be even more difficult in the future. In addition, even when the main body water treatment device 111 can be removed alone, if the auxiliary water treatment device 112 is also activated, the main body water treatment device 111 is difficult to remove by the main body water treatment device 111 alone. There is a problem that the water quality of the treated water varies or deteriorates due to different operators who set the computing unit 122, such as when it is determined that the treatment by the device 111 alone is possible and the auxiliary water treatment device 112 is not started. It was. Furthermore, there is a problem that measurement accuracy deteriorates due to contamination of the feed raw water quality meter 121 due to an object to be removed or a pollutant, and a deviation occurs when the auxiliary water treatment device 112 is activated. In order to prevent this problem, In addition, it is necessary to frequently perform maintenance of the supply raw water quality meter 121, and there is a problem that it takes cost and labor.

  Another conventional water treatment system shown in FIG. 6 is known. This water treatment system 301 measures the treated water treated by the main body water treatment device 111 with the treated water quality meter 131 and sequentially calculates the measured values with the calculator 122. When the predetermined set value set in 122 is exceeded, the auxiliary water treatment device 112 installed in the treated water main connected to the main body water treatment device 111 is activated to start the main body water treatment device. The treated water treated at 111 is further treated by the auxiliary water treatment device 112.

  Since this water treatment system 301 measures the treated water with the treated water quality meter 131, the treated water quality meter 131 is easy to maintain because it is hardly affected by the removal target and the pollutant. However, when the quality of the feed water deteriorates and the main body water treatment device 111 alone cannot process the removal target and starts the auxiliary water treatment device 112, the incident water Since it is determined when the treatment device 112 is activated, there is a problem in that treated water with incomplete treatment is mixed into the treated water side due to a time lag. In addition, after the quality of the feed water is recovered, there is a problem that it is difficult to make a judgment when stopping the auxiliary water treatment device 112.

  Another conventional water treatment system shown in FIG. 7 is known. This water treatment system 401 measures the feed raw water with the feed raw water quality meter 121 and measures the treated water with the treated water quality meter 131, and the calculation obtained by sequentially processing both measured values with the calculator 122. When the value exceeds a predetermined set value set in the calculator 122, the auxiliary water treatment device 112 installed in the treated water main connected to the main body water treatment device 111 is activated, The treated water treated by the main body water treatment device 111 is further treated.

  Since this water treatment system 401 makes a judgment based on both the quality of the raw water and the quality of the treated water treated by the main body water treatment device 111, it is possible to easily and accurately make a judgment when starting the auxiliary water treatment device 112. However, since it takes a certain period of time to process the raw raw water to be treated with the main body water treatment device 111, a time lag occurs when trying to measure the same target with the raw water quality meter 121 and the treated water meter 131. In addition, when a removal target that cannot be removed by the main body water treatment device 111 alone is mixed into the raw feed water, there is a problem in that treated water with incomplete treatment is mixed into the treated water side when the auxiliary water treatment device 112 is delayed. Moreover, since the quality of the treated water treated by the main body water treatment device 111 alone is predicted from the quality of the raw water and it is judged when the auxiliary water treatment device 112 is stopped, an error is likely to occur, and the treated water is incompletely treated. In order to prevent mixing, there was an inconvenience that water was excessively passed through the auxiliary treatment device 112. In addition, there is a problem that the measurement accuracy deteriorates due to contamination of the feed raw water quality meter 121 due to the removal target and pollutant, and there is a problem that deviation occurs when starting the auxiliary water treatment device 112, in order to prevent this problem Has a problem in that it requires frequent maintenance of the raw water quality meter 121, which is expensive and labor intensive. Furthermore, since the water quality meters need to be installed at two locations on the supply raw water side and the treated water side, there is a problem in that maintenance becomes complicated and costs and labor are required. In addition, since the water quality meter on the supply raw water side is expensive, there is a problem that the initial investment cost becomes high.

  Further, each of the water treatment systems 201 to 401 monitors the operating state of the main body water treatment apparatus using a measured value obtained by measuring the quality of the supplied raw water or treated water with a water quality meter. However, the measured value measured by the water quality meter is a substitute characteristic value for indirectly predicting a change in operating condition due to a load applied to the main body water treatment apparatus, for example, an increase in pressure loss in the main body water treatment apparatus. Therefore, in order to monitor the operation status of the main body water treatment device using the measurement value measured by the water quality meter, there is a problem that the ratio depending on experience is high.

JP 10-085722

  The present invention has been made to solve the above-described drawbacks, and the object of the present invention is that the computing unit is a measured value measured by the water quality meter and a predetermined set value set in the computing unit. Based on the above, when starting / stopping an auxiliary water treatment device, it is possible to set the specified setting value etc. set in the calculator without depending on the experience of the operator, and set the setting value etc. in the calculator It is an object of the present invention to provide a water treatment system that can eliminate variations in the quality of treated water even if workers are different, and can obtain a reliable and good treated water quality.

  Another object is to provide a water treatment system that can easily make a judgment when stopping an auxiliary water treatment device after the quality of raw water is recovered.

  In addition, another object is to provide a water treatment system that can start up the auxiliary water treatment device in a timely manner and prevent treated water that is incompletely treated from entering the treated water side. is there.

  Another object is to provide a water treatment system that prevents deterioration in measurement accuracy due to contamination of water quality instruments, reduces the frequency of maintenance, and can reduce costs and labor.

  Another object of the present invention is to provide a water treatment system capable of omitting an expensive supply raw water quality meter as a water quality meter for control and suppressing initial capital investment.

  Moreover, the water treatment system which can control the water quality load concerning a main body water treatment apparatus, without using the measured value of the water quality meter measured as a substitute characteristic for monitoring the operating condition of a main body water treatment apparatus is provided. It is.

  In order to achieve the above object, a water treatment system according to claim 1 of the present invention is connected to a feed raw water branch branched from a feed raw water main and treats the feed raw water flowing through the feed raw water branch. A control water treatment device to be treated water, a control water quality instrument installed in a treatment water branch connected to the control water treatment device to measure the treated water treated by the control water treatment device, and A main body water treatment device of the same treatment method as the control water treatment device connected to the feed raw water main and connected to the feed raw water main to treat the feed raw water distributed in the feed raw water main to be treated water, and the control Based on the measured value measured by the water quality meter and a predetermined set value, etc., the main body water treatment device is connected to the main body water treatment device following the main body water treatment device to determine whether the removal target can be processed below the set value. Treated water main or treated water main Is installed in the treated water branch branched from the above, and activated when the computing unit determines that the main body water treatment device cannot treat the object to be removed below a set value and distributes it to the treated water main pipe or the treated water branch pipe. It is provided with the incidental water treatment apparatus which processes the treated water.

  In addition, the water treatment system according to claim 2 of the present invention is connected to the feed raw water branch branched from the feed raw water main, and treats the feed raw water flowing through the feed raw water branch into treated water. A control water treatment device, a control water quality meter installed in a treated water branch connected to the control water treatment device for measuring the treated water treated by the control water treatment device, and a supply water main It is then measured by the main body water treatment device of the same treatment method as the control water treatment device, which is connected to the treated raw water flowing through the supply raw water main and treated as treated water, and the control water quality meter. Based on the measured value and a predetermined set value, etc., the main body water treatment device determines whether the removal target can be processed below the set value, and the supply branched from the supply raw water main or the supply raw water main Installed in the raw water branch, An auxiliary water treatment device that is activated when a main body water treatment device determines that the object to be removed cannot be treated below a set value, and that treats the raw feed water flowing through the feed raw water main or the feed raw water branch. It is characterized by comprising.

  Moreover, the water treatment system according to claim 3 of the present invention is the water treatment system according to claim 2, wherein the water supply system is installed in the supply raw water branch pipe to which the control water treatment apparatus is subsequently connected, and the supply raw water branch pipe is A control inflow pressure gauge that measures the inflow pressure of the raw feed water that flows into the control water treatment device via, the computing unit is a measurement value measured by the control water quality meter and the control inflow pressure gauge And determining whether the main body water treatment device can process the object to be removed below the set value and whether the inflow pressure to the main body water treatment device is higher than the set value based on a predetermined set value, etc. The apparatus is activated when the arithmetic unit determines that the main body water treatment device cannot process the object to be removed below the set value or / and determines that the pressure flowing into the main body water treatment device is equal to or higher than the set value. , It is characterized in processing the supplied raw water in circulation to the supply raw water mains or the supply raw water branch pipe.

  Further, the water treatment system according to claim 4 of the present invention is connected to the supply raw water branch branched from the supply raw water main, and treats the supply raw water flowing through the supply raw water branch into treated water. A control water treatment device and a control for measuring an inflow pressure of the raw feed water flowing into the control water treatment device via the feed raw water branch pipe, which is installed in the feed raw water branch pipe to which the control water treatment device is subsequently connected Main body water of the same treatment method as the control water treatment device, which is connected to the inflow pressure gauge for use subsequent to the supply raw water main, and treats the supply raw water flowing through the supply raw water main into treated water A processing unit, an arithmetic unit that determines whether or not an inflow pressure to the main body water treatment device is equal to or higher than a set value based on a measured value measured by the control inflow pressure gauge and a predetermined set value, and the supply Raw water main or supply raw water Installed in the supply raw water branch branched from the pipe, and activated when the computing unit determines that the inflow pressure to the main body water treatment device is equal to or higher than a set value, and flows to the supply raw water main pipe or the supply raw water branch It is provided with the incidental water treatment apparatus which processes the supplied raw water.

  Moreover, the water treatment system which concerns on Claim 5 of this invention is a water treatment system in any one of Claims 1 thru | or 4. WHEREIN: The said water treatment apparatus for control and the said main body water treatment apparatus are a membrane filtration apparatus and sand filtration. It is either a device or a fiber filtration device.

  In the water treatment system of the present invention provided with the control water quality meter, the computing unit starts up the auxiliary water treatment device based on the measured value of the treated water treated by the control water treatment device and a predetermined set value or the like. Since the operation is stopped, the predetermined set value or the like set in the computing unit becomes the set value or the like for the treated water, and the operator can set it without depending on experience. Therefore, even if the operator who sets the setting value or the like in the calculator differs, the variation in the quality of the treated water treated by the main body water treatment apparatus can be eliminated, and a reliable and good treated water quality can be obtained.

  Furthermore, in the water treatment system of the present invention provided with a control water quality meter, the measured value of treated water treated by the control water treatment device that treats the raw feed water distributed in the feed raw water branch pipe into treated water, etc. Since the auxiliary water treatment device is started or stopped based on the above, it is possible to easily make a judgment when stopping the auxiliary water treatment device after the quality of the raw feed water is recovered.

  Furthermore, in the water treatment system of the present invention equipped with a control water quality meter, a measured value obtained by measuring treated water treated by a control water treatment apparatus connected to a supply raw water branch branched from the supply raw water main. As a result, the time lag can be shortened compared to using the treated water treated by the main body water treatment device, and the incidental water can be collected in a timely manner when the quality of the feed water is deteriorated. A processing apparatus can be started and it can prevent that the processing water incompletely processed mixes into the processing water side.

  Furthermore, in the water treatment system of the present invention provided with a control water quality meter, an expensive control water quality meter that directly measures raw water is unnecessary, and the treated water obtained by treating the supplied raw water with the control water treatment device is measured. It is only a control water quality meter. Therefore, it is possible to prevent the measurement accuracy from being deteriorated due to the contamination of the control water quality meter, eliminate the need for maintenance for the purpose of removing only the stain on the control water quality meter, and reduce labor and maintenance costs.

  Furthermore, in the water treatment system of the present invention having the control inflow pressure gauge, the water quality load of the main body water treatment apparatus is monitored using the measured value measured by the control inflow pressure gauge, Since the start and stop can be controlled, the operation status of the main body water treatment apparatus can be easily monitored.

  Furthermore, in the water treatment system of the present invention equipped with the control inflow pressure gauge, since the measurement with the control water quality gauge can be made unnecessary, the water quality gauge related to the water quality measurement becomes unnecessary, and the initial capital investment cost is kept low. This can save maintenance costs and labor.

Schematic explanatory diagram of a water treatment system according to the present invention 1 Schematic explanatory diagram of a water treatment system according to the present invention 2 Schematic explanatory diagram of the water treatment system according to the present invention 3 Schematic explanatory diagram of conventional 1 water treatment system Schematic explanatory diagram of conventional 2 water treatment system Schematic explanatory diagram of conventional 3 water treatment system Schematic explanatory diagram of conventional 4 water treatment system

  Hereinafter, with reference to the drawings, a water treatment system according to an embodiment of the present invention will be described by way of example.

Example 1:
FIG. 1 is a schematic explanatory diagram of a water treatment system according to the first aspect of the present invention. The water treatment system 1 according to the present invention includes a control water treatment device 10, a control water quality meter 20, a main body water treatment device 30, a calculator 40A, and a post-treatment device 50A that is an auxiliary water treatment device. Yes.

  The control water treatment apparatus 10 is connected subsequent to the supply raw water branch pipe 71 branched from the supply raw water main pipe 70 at the branch point 80, and processes the supply raw water flowing through the supply raw water branch pipe 71 to obtain treated water. To do. This is a water treatment device that is smaller than the main body water treatment device 30 that can treat the raw feed water by the same treatment method as the main body water treatment device 30 described later. Therefore, if the supply raw water is the same, the quality of the treated water treated by the control water treatment device 10 and the quality of the treated water treated by the main body water treatment device 30 are the same. In this embodiment, since the main body water treatment device 30 is a UF membrane filtration device, the control water treatment device 10 is also a UF membrane filtration device. If the main body water treatment device 30 is a sand filtration device, the control water treatment device 10 is also a sand filtration device. The supplied raw water is a name of raw water supplied to the water treatment system of the present invention. When the water treatment apparatus and the water treatment system of the present invention are connected, the name of the raw feed water is changed even when the treated water is treated by the preceding stage water treatment apparatus when introduced into the latter stage water treatment system. The treated water refers to treated water treated by the control treatment device or the main body treatment device.

  The control water quality meter 20 is a water quality meter that is installed in the treated water branch 76 that is connected to the control water treatment device 10 subsequent to the control water treatment device 10 and measures the quality of the treated water treated by the control water treatment device 10. The monitoring measurement items for monitoring whether or not the supply raw water contains removal targets that cannot be treated by the main body water treatment device 30 are the number of fine particles, turbidity, chromaticity, ultraviolet absorbance, electrical conductivity, redox potential. PH value, STR (Abbreviation of Suction Time Ratio, meaning suction time ratio), and the like. Therefore, the water meter 20 for control is comprised with arbitrary water quality meters so that the above-mentioned monitoring measurement item can be measured.

  The main body water treatment device 30 is connected subsequent to the supply raw water main 70 and processes the supply raw water circulating in the supply raw water main 70 to be treated water. In this embodiment, it is a membrane filtration device for a UF membrane. It should be noted that what type of treatment system is used for the main body water treatment device 30 is appropriately selected according to the supply raw water and the target water quality. Therefore, a membrane filtration device using any one of the MF membrane, NF membrane, RO membrane, and large pore membrane may be used. Further, it may be a sand filtration device for fine filtration or coarse filtration, or a fiber filtration device instead of a membrane filtration device.

  The computing unit 40A sequentially processes each measurement value sent from the control water quality meter 20 and converts it into each computed value, and whether or not it deviates from a predetermined set value or the like set in advance in the computing unit 40A. Determine whether. As a result, when the calculated value of the monitored measurement item is outside the range of the startup setting value, or / and when the rate of change of the calculated value of the monitored measurement item is greater than the startup change rate, or / and When it is expected that the calculated value will be out of the range of the startup setting value taking into account the time required for the preprocessing device to pass from the rate of change (hereinafter referred to as “outside setting”), the post-processing device 50A described later is started. It is supposed to let you. Conversely, when the post-processing device 50A is activated and the calculated value of the monitored measurement item is within the range of the stop set value, the calculated value of the monitored measurement item is continuously within the range of the activated set value. If it is within (hereinafter referred to as “within setting”), a post-processing device 50A described later is stopped. Further, when the post-processing device 50A is stopped and the calculated value of the monitoring measurement item is within the setting, the post-processing device 50A is maintained in the stopped state as it is.

  The aftertreatment device 50A is installed in the treated water branch pipe 77 branched from the treated water main pipe 75 connected to the main body water treatment apparatus 30 at the branch point 85, and activated or stopped by the computing unit 40A, and the main body water treatment apparatus It is an apparatus which assists the main body water treatment apparatus 30 which processes the treated water processed in 30 further. There are granular activated carbon filtration device, powder activated carbon injection device, ion exchange resin device, adsorbent device such as cerium oxide, etc. as the device used for the aftertreatment device 50A, and which device to use is supplied. It shall be appropriately selected according to the quality of raw water and treatment target water.

  Next, a flow for starting or stopping the post-treatment device 50A in the water treatment system 1 having the above-described configuration will be described.

  Supply raw water partially flows into the supply raw water branch pipe 71 branched from the supply raw water main pipe 70 at the branch point 80 and passes through the control water treatment apparatus 10 connected to the supply raw water branch pipe 71 after the supply raw water branch pipe 71. To be treated water. The treated water passes through the control water quality meter 20 installed in the treated water branch pipe 76 connected to the control water treatment apparatus 10 subsequent to the treated water treatment apparatus 10 so that the monitoring measurement items of the treated water are continuously measured. . Since the treated water branch 76 connected subsequent to the control water quality meter 20 is connected to the supply raw water main pipe 70 at the junction 81 on the main body water treatment device side from the branch point 80, the control water quality meter 20. The treated water that has passed through flows into the supply raw water main pipe 70 at the junction 81 and becomes a part of the supply raw water. The treated water that has passed through the control water quality meter 20 may be returned to a raw water tank (not shown) or treated as waste water.

  The measurement values of the monitoring measurement items continuously measured by the control water quality meter 20 are sent to the calculator 40A at regular intervals that can be arbitrarily set. In the computing unit 40A, the measured value of the monitoring measurement item is processed based on a predetermined method, converted into a computed value, and compared with a prescribed set value set in advance in the computing unit 40A. Determine whether it is within range.

  The supply raw water flowing through the supply raw water main 70 is treated by passing through the main body water treatment device 30 installed in the supply raw water main 70 and becomes treated water, and is connected to the main body water treatment device 30 subsequent to the main water treatment device 30. To the treated water main pipe 75.

  When the computing unit 40A determines that the setting is within the range, the post-treatment device 50A is stopped, so that the valve 91A installed in the treated water main 75 is opened and the treated water main 75 The valve 92A installed in the treated water branch pipe 77 branched at the branch point 85 and the valve 93A installed in the treated water branch pipe 78 connected to the aftertreatment device 50A are closed. Therefore, the treated water treated by the main body water treatment device 30 flows through the treated water main pipe 75 as it is without passing through the post-treatment device 50A, and flows out to a treated water tank or the like (not shown).

  On the other hand, when the calculator 40A determines that the setting is outside the setting, the post-treatment device 50A is activated, so that the valve 91A installed in the treated water main pipe 75 is closed and the treated water main A valve 92A installed in the treated water branch pipe 77 branched from the pipe 75 at the branch point 85 and a valve 93A installed in the treated water branch pipe 78 connected subsequent to the aftertreatment device 50A are opened. . Therefore, the treated water treated by the main body water treatment apparatus 30 flows into the post-treatment apparatus 50A from the treated water branch pipe 77 via the valve 92A and passes through the post-treatment apparatus 50A. The removal target estimated not to be processed by the monitoring measurement item outside the range is removed and the load is reduced. The treated water treated by the post-treatment device 50A flows into the treated water branch pipe 78, flows into the treated water main pipe 75 at the junction 86 via the valve 93A installed in the middle, and the treated water (not shown). It flows out to the tank.

  As described above, the determination of whether to start or stop the post-treatment device 50A can be performed with the measured value obtained by measuring the treated water treated by the control water treatment device 10 using the control water quality meter 20. Unlike the determination, it can be performed easily, and the variation by the operator can be eliminated. Furthermore, the treated water is not treated by the main body water treatment apparatus 30 but is treated by the control water treatment apparatus 10 that is smaller than the main body water treatment apparatus 30, so that the treatment time is short and the quality of the supplied raw water is low. It becomes possible to shorten the time lag in the case of a change.

Example 2:
FIG. 2 is a schematic explanatory diagram of a water treatment system according to the second aspect of the present invention. The water treatment system 2 according to the present invention includes a control water treatment device 10, a control water quality meter 20, a main body water treatment device 30, a calculator 40B, a pretreatment device 50B as an auxiliary water treatment device, and a control An inflow pressure gauge 60 is provided. The same numbers as those in the first embodiment indicate the same configurations. Hereinafter, differences from the first embodiment will be mainly described.

  Reference numeral 60 denotes a control inflow pressure gauge, which is installed in a supply raw water branch pipe 71 branched from a branch point 80 and subsequently connected to the control water treatment apparatus 10, flows through the supply raw water branch pipe 71 and flows into the control water treatment apparatus 10. The inflow pressure of the supplied raw water is continuously measured and the water quality load on the control water treatment apparatus 10 is monitored, and the measured values are sent to a calculator 40B described later at regular intervals.

  The computing unit 40B sequentially processes each measured value sent from the control water quality meter 20 and the control inflow pressure meter 60 to convert it into each computed value, and each predetermined value set in advance in the computing unit 40B. It is determined whether or not the set value is deviated. As a result, when it is determined that it is not set, or / and when it is determined that the calculated value of the control inflow pressure gauge 60 is outside the range of the predetermined set value, a pre-processing device 50B described later is started. Yes. Conversely, when the pre-processing device 50B is activated and it is determined that it is within the setting, and when it is determined that the calculated value of the control inflow pressure gauge 60 is within the range of the predetermined setting value, The processing device 50B is stopped. Further, when the pre-processing device 50B is stopped and it is determined that it is within the setting, and when it is determined that the calculated value of the control inflow pressure gauge 60 is within the range of the predetermined setting value, the pre-processing The device 50B is maintained in a stopped state as it is.

  The pretreatment device 50B is installed in the supply raw water branch 72 branched at the branch point 87 from the supply raw water main pipe 70 to which the main body water treatment device 30 is subsequently connected, and is started or stopped according to an instruction from the computing unit 40B. It is an apparatus that assists the main body water treatment apparatus 30 that treats the supply raw water before being treated by the main body water treatment apparatus 30. The apparatus used for the pretreatment apparatus 50B is the same apparatus as the posttreatment apparatus 50A of the first embodiment, and also includes a sedimentation basin / powdered activated carbon contact apparatus. Which of these devices is to be used is appropriately selected depending on the raw water supply and the target water quality.

  Next, a flow for starting or stopping the pretreatment device 50B in the water treatment system 2 configured as described above will be described.

  The raw feed water flows into the feed raw water branch 71 that is branched from the feed raw water main pipe 70 at the branch point 80 and passes through the control inflow pressure gauge 60 installed in the feed raw water branch 71. The feed water inflow pressure is continuously measured. The raw feed water that has passed through the control inflow pressure gauge 60 is treated by passing through the control water treatment apparatus 10 that is connected to the feed raw water branch pipe 71 and then becomes treated water. The treated water passes through the control water quality meter 20 installed in the treated water branch pipe 76 connected to the control water treatment apparatus 10 subsequent to the treated water treatment apparatus 10 so that the monitoring measurement items of the treated water are continuously measured. . Since the treated water branch pipe 76 is connected to the supply raw water main pipe 70 at the junction 81 on the main body water treatment device side from the branch point 80, the treated water that has passed through the control water quality meter 20 is supplied at the junction 81. It flows into the main pipe 70 and becomes a part of the supply raw water. The treated water that has passed through the control water quality meter 20 may be returned to a raw water tank (not shown) or treated as waste water.

  The measured value of the inflow pressure continuously measured by the control inflow pressure gauge 60 and the measured value of the monitoring measurement item continuously measured by the control water quality meter 20 are set at regular intervals that can be arbitrarily set. It is sent to the computing unit 40B. In the calculator 40B, the measured value of the inflow pressure and the measured value of the monitoring measurement item are processed based on a predetermined method and converted into calculated values, and each predetermined set value set in advance in the calculator 40B. In contrast, it is determined whether it is within the set value range.

  If the calculator 40B determines that the calculated value of the inflow pressure gauge 60 for control is within a predetermined set value range within the setting, the pre-processing device 50B is stopped. The valve 91B installed in the raw water main pipe 70 is opened, and following the valve 92B and the pretreatment device 50B installed in the supply raw water branch pipe 72 branched from the supply raw water main pipe 70 at a branch point 87. The valve 93B installed in the connected supply raw water branch pipe 73 is closed. Therefore, the supply raw water flowing through the supply raw water main 70 is processed by the main body water treatment device 30 without passing through the pretreatment device 50B, becomes treated water, flows through the treatment water main 75, and is not shown. It flows out to the water tank.

  On the other hand, when the calculator 40B determines that the setting value is out of the setting range and / or the calculation value of the control inflow pressure gauge 60 is outside the range of the predetermined setting value, the pre-processing device 50B is started. Therefore, the valve 91B installed in the supply raw water main pipe 70 is closed and the valve 92B installed in the supply raw water branch pipe 72 branched from the supply raw water main pipe 70 at the branch point 87 and the pretreatment device. Valve 93B installed in the supply raw water branch pipe 73 connected subsequent to 50B is opened. Accordingly, the supply raw water flowing through the supply raw water main pipe 70 flows into the pretreatment device 50B from the supply raw water branch pipe 72 via the valve 92B and passes through the pretreatment device 50B. The removal target, which is estimated not to be processed by the monitoring measurement item out of the range or specified by the water quality load being too high, is removed and the load is reduced. The feed raw water treated by the pretreatment device 50B flows into the feed raw water branch pipe 73, and flows into the feed raw water main pipe 70 at a junction 88 via a valve 93B installed on the way. The main body water treatment device 30 connected after the main body 70 is treated and becomes treated water, flows through the treated water main pipe 75, and flows out to a treated water tank (not shown).

  As described above, the water treatment system 2 according to the second embodiment is a pretreatment device based on the measured value of the inflow pressure measured by the control inflow pressure gauge 60 in addition to the operation of the water treatment system 1 according to the first embodiment. Since starting and stopping of 50B can be controlled, the operation status of the main body water treatment device 30 can be easily monitored.

Example 3:
FIG. 3 is a schematic explanatory diagram of a water treatment system according to the third aspect of the present invention. The water treatment system 3 according to the present invention includes a control water treatment device 10, a main body water treatment device 30, a calculator 40C, a pretreatment device 50B that is an auxiliary water treatment device, and a control inflow pressure gauge 60. ing. That is, the water treatment system of Example 3 is obtained by removing the control water quality meter from Example 2. The differences from the second embodiment will be mainly described below.

  The computing unit 40C sequentially processes the measurement values sent from the control inflow pressure gauge 60 to convert them into computed values, and whether or not they are out of the predetermined set values set in advance in the computing unit 40C. To come to judge. As a result, when it is determined that the calculated value of the control inflow pressure gauge 60 is outside the range of the predetermined set value, the pre-processing device 50B is activated. Conversely, when the pretreatment device 50B is activated and it is determined that the calculated value of the control inflow pressure gauge 60 is within a predetermined set value range, the pretreatment device 50B is stopped. It has become. When the pretreatment device 50B is stopped and it is determined that the calculated value of the control inflow pressure gauge 60 is within a predetermined set value range, the pretreatment device 50B remains in the stopped state. Is supposed to be maintained.

  Next, a flow for starting or stopping the pretreatment device 50B in the water treatment system 3 configured as described above will be described.

  The raw feed water flows into the feed raw water branch 71 that is branched from the feed raw water main pipe 70 at the branch point 80 and passes through the control inflow pressure gauge 60 installed in the feed raw water branch 71. The feed water inflow pressure is continuously measured. The raw feed water that has passed through the control inflow pressure gauge 60 is treated by passing through the control water treatment apparatus 10 that is connected to the feed raw water branch pipe 71 and then becomes treated water. The treated water passes through the treated water branch pipe 76 connected to the control water treatment apparatus 10 subsequent to the control water treatment apparatus 10, and flows into the supply raw water main pipe 70 connected at the junction 81 on the main body water treatment apparatus side from the branch point 80. Part of the raw feed water. The treated water treated by the control water treatment apparatus 10 may be returned to a raw water tank (not shown) or treated as waste water.

  The measured values of the inflow pressure continuously measured by the control inflow pressure gauge 60 are sent to the computing unit 40C at regular intervals that can be arbitrarily set. In the calculator 40C, the measured value of the inflow pressure is processed based on a predetermined method, converted into a calculated value, and compared with each predetermined set value set in advance in the calculator 40C. Determine whether it is within range.

  When the computing unit 40C determines that the computed value of the control inflow pressure gauge 60 is within the range of the predetermined set value, the pretreatment device 50B is stopped, so the supply raw water main 70 The supply valve 91B which is installed is opened and connected to the supply source water branch pipe 72 branched from the supply raw water main pipe 70 at a branch point 87 and connected to the pretreatment device 50B. The valve 93B installed in the raw water branch pipe 73 is closed. Therefore, the supply raw water flowing through the supply raw water main 70 is processed by the main body water treatment device 30 without passing through the pretreatment device 50B, becomes treated water, flows through the treatment water main 75, and is not shown. It flows out to the water tank.

  On the other hand, if it is determined by the calculator 40C that the calculated value of the control inflow pressure gauge 60 is outside the range of the predetermined set value, the pretreatment device 50B will be started, so the raw raw water supply The valve 91B installed in the pipe 70 is closed and connected to the valve 92B and the pretreatment device 50B installed in the feed raw water branch pipe 72 branched from the feed raw water main pipe 70 at the branch point 87. The valve 93B installed in the supplied raw water branch pipe 73 is opened. Accordingly, the supply raw water flowing through the supply raw water main pipe 70 flows into the pretreatment device 50B from the supply raw water branch pipe 72 via the valve 92B and passes through the pretreatment device 50B. The removal target specified by the water quality load being too high is removed and the load is reduced. The feed raw water treated by the pretreatment device 50B flows into the feed raw water branch pipe 73, and flows into the feed raw water main pipe 70 at a junction 88 via a valve 93B installed on the way. The main body water treatment device 30 connected after the main body 70 is treated and becomes treated water, flows through the treated water main pipe 75, and flows out to a treated water tank (not shown).

  As described above, the water treatment system 3 of the third embodiment controls the start and stop of the pretreatment device 50B based on the inflow pressure measured by the control inflow pressure gauge 60, similarly to the water treatment system 2 of the second embodiment. Therefore, the operation status of the main body water treatment device 30 can be easily monitored.

1, 2 and 3 Water treatment system 10 Water treatment device for control 20 Water quality meter for control 30 Main body water treatment device 40 Calculator 50 Attached water treatment device (pre-treatment device, post-treatment device)
60 Inflow pressure gauge for control 70 Supply raw water main pipe 71, 72, 73 Supply raw water branch pipe 75 Treated water main pipe 76, 77, 78 Treated water branch pipe 80, 85, 87 Branch point 81, 86, 88 Confluence

Claims (5)

A control water treatment device connected to the supply raw water branch branched from the supply raw water main, and treating the supply raw water flowing through the supply raw water branch into treated water;
A control water quality meter installed in a treated water branch connected to the control water treatment device for measuring treated water treated by the control water treatment device;
A main body water treatment device of the same treatment method as the control water treatment device, which is connected to the feed raw water main after the feed raw water and treats the feed raw water distributed in the feed raw water main to treat water.
An arithmetic unit that determines whether the main body water treatment device can process the object to be removed below a set value based on the measured value and a predetermined set value measured by the control water quality meter,
Installed in the treated water main pipe or the treated water branch branched from the treated water main pipe connected to the main body water treatment apparatus, and the computing unit cannot process the removal target below the set value in the main body water treatment apparatus. A water treatment system comprising an auxiliary water treatment device that is activated when judged and treats treated water flowing through the treated water main or the treated water branch. A control water treatment device connected to the supply raw water branch branched from the supply raw water main, and treating the supply raw water flowing through the supply raw water branch into treated water;
A control water quality meter installed in a treated water branch connected to the control water treatment device for measuring treated water treated by the control water treatment device;
A main body water treatment device of the same treatment method as the control water treatment device, which is connected to the feed raw water main after the feed raw water and treats the feed raw water distributed in the feed raw water main to treat water.
An arithmetic unit that determines whether the main body water treatment device can process the object to be removed below a set value based on the measured value and a predetermined set value measured by the control water quality meter,
The supply raw water main or the supply raw water branch branched from the supply raw water main is started when the computing unit determines that the main body water treatment device cannot process the removal target below a set value, and the supply A water treatment system comprising an auxiliary water treatment device for treating raw water supplied to the raw water main or the supply raw water branch. The control water treatment apparatus is installed in the supply raw water branch pipe to which the control water treatment apparatus is subsequently connected, and includes a control inflow pressure gauge for measuring an inflow pressure of the raw feed water flowing into the control water treatment apparatus through the supply raw water branch pipe. ,
The arithmetic unit is capable of processing the main body water treatment device to be a target to be removed below a set value based on measured values measured by the control water quality meter and the control inflow pressure meter, a predetermined set value, and the like. Determine whether the inflow pressure to the main body water treatment device is higher than a set value,
The auxiliary water treatment device determines that the computing unit determines that the main body water treatment device cannot process the removal target below a set value or / and that the inflow pressure to the main body water treatment device is equal to or higher than the set value. 3. The water treatment system according to claim 2, wherein the water treatment system is activated to treat the feed raw water flowing through the feed raw water main pipe or the feed raw water branch pipe. A control water treatment device connected to the supply raw water branch branched from the supply raw water main, and treating the supply raw water flowing through the supply raw water branch into treated water;
An inflow pressure gauge for control that is installed in the feed raw water branch to which the control water treatment apparatus is subsequently connected, and that measures the inflow pressure of the feed raw water that flows into the control water treatment apparatus via the feed raw water branch;
A main body water treatment device of the same treatment method as the control water treatment device, which is connected to the feed raw water main after the feed raw water and treats the feed raw water distributed in the feed raw water main to treat water.
An arithmetic unit that determines whether the inflow pressure to the main body water treatment device is equal to or higher than a set value based on the measured value and a predetermined set value measured by the inflow pressure gauge for control,
The supply raw water main or a supply raw water branch branched from the supply raw water main is started when the calculator determines that the inflow pressure to the main body water treatment device is equal to or higher than a set value. A water treatment system comprising an auxiliary water treatment device for treating raw water supplied to the raw water main or the supply raw water branch. 5. The water treatment system according to claim 1, wherein the control water treatment device and the main body water treatment device are any one of a membrane filtration device, a sand filtration device, and a fiber filtration device.

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