JP2021100745A - Water treatment system and water treatment method - Google Patents

Abstract

To provide a water treatment system that achieves improved cost competitiveness while maintaining a purification performance.SOLUTION: A water treatment system 1 has a primary water storage tank 10 that stores raw water, a water purification device 12 that circulates the raw water between itself and the primary water storage tank 10 and purifies the raw water, and a secondary water storage tank 14 that stores the purified water purified by the water purification device 12. The water purification device 12 has a circulation pipe 30 that circulates water including raw water, a plurality of parallel pipes 31 connected to the circulation pipe 30, a plurality of water supply pumps 40 that is installed in each parallel pipe 31 and pumps raw water from the primary water storage tank 10 and sends the raw water, and a filtration tank 43 that filters the raw water. The number of installation of the filtration tank(s) 43 is smaller than that of the water supply pumps 40.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to water treatment systems and methods.

Conventionally, there is a water treatment system that purifies raw water, which is water from a water source such as a well, river or pond, or rainwater, for use as drinking water or domestic water. Patent Document 1 includes a primary water tank used for storing and purifying raw water and a secondary water tank for storing purified water, and the raw water stored in the primary water tank is used as a water purification device. It discloses a water purification system that improves purification efficiency by circulating and purifying water between them.

JP-A-2009-95822

A water treatment system as shown in Patent Document 1 is particularly useful in developing countries where water supply facilities are not sufficiently equipped. However, when applying such a water treatment system to ordinary houses in developing countries, not only purification performance but also costs at the time of introduction and use are important. Here, if the water treatment system is applied to only one house, one house may not be able to cover the cost, or if the operating time is short, the system itself may be over-engineered. On the other hand, in order to obtain an advantage in terms of cost, it is conceivable to distribute water purified by one water treatment system to a plurality of houses. However, when a plurality of houses are covered by one water treatment system, there is a concern that the load on the pump, for example, may increase due to the long operating time. Attempts to adopt, for example, highly durable pumps to cope with the increased load on the pumps can result in increased costs and require further improvements in the water treatment system.

The present disclosure has been made in view of the problems of the prior art. An object of the present disclosure is to provide a water treatment system and a water treatment method which are advantageous in terms of cost while maintaining purification performance.

In order to solve the above problems, the water treatment system according to one aspect of the present disclosure includes a primary water tank for storing raw water, a water purification device for purifying raw water by circulating it between the primary water tanks, and a water purification device. It is equipped with a secondary water tank that stores purified water purified by, and water purification equipment is installed in each of the circulation pipes that circulate the water including raw water, multiple parallel pipes connected to the circulation pipes, and parallel pipes. It is equipped with a plurality of water supply pumps for pumping and sending raw water from the primary water tank and a filtration tank for filtering the raw water, and the number of installed filtration tanks is smaller than the number of installed water supply pumps.

Further, in the water treatment method according to one aspect of the present disclosure, the primary water storage step of storing raw water in the primary water storage tank and the raw water stored in the primary water storage step are circulated between the primary water storage tank and the water purification device to purify the water. Including a purification process for purifying water and a secondary water storage process for storing purified water purified in the purification process in a secondary water storage tank, the purification process involves a plurality of parallel pipes connected to a circulation pipe that circulates water containing raw water. The raw water is filtered by a plurality of water supply pumps installed in each of them pumping raw water from the primary water tank and sending it through a filter tank having a smaller number of installations than the water supply pumps.

According to the present disclosure, it is possible to provide a water treatment system and a water treatment method that are advantageous in terms of cost while maintaining purification performance.

It is the schematic of the water treatment system which concerns on one Embodiment of this disclosure. It is a control block diagram which concerns on a control part. It is a flowchart which shows the flow of the water treatment process in a water treatment system. It is a flowchart which shows the flow of the primary water storage process included in a water treatment process. It is a flowchart which shows the flow of the purification process included in the water treatment process. It is a flowchart which shows the flow of the secondary water storage process included in a water treatment process. It is a schematic diagram which shows the system which manages a plurality of main body configurations of a water treatment system.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

FIG. 1 is a schematic view of a water treatment system 1 according to an embodiment. The water treatment system 1 purifies the raw water as the water to be treated to the extent that it can be used as domestic water, for example. Here, the raw water means water from a water source such as a well, a river or a pond, or rainwater. In the following description, it is assumed that the raw water is well water as an example. Further, the water purified by the water purification device 12 described later is referred to as purified water.

Further, the water treatment system 1 supplies purified water to a plurality of houses 200. In particular, the water treatment system 1 is suitable for supplying purified water to a medium-scale supply range in which several to several tens of houses 200 exist. In FIG. 1, as an example, it is assumed that the water treatment system 1 supplies purified water to 10 houses 200 from the houses 200a to the houses 200j.

The water treatment system 1 includes a primary water storage tank 10, a water purification device 12, a secondary water storage tank 14, and a control unit 16.

The primary water tank 10 stores raw water pumped from underground. However, since the raw water is circulated with the water purification device 12 and gradually purified, the proportion of purified water in the primary water tank 10 becomes larger than that of the raw water as the purification treatment by the water purification device 12 progresses. .. As elements related to the primary water tank 10, the water treatment system 1 includes a pumping pipe 20, a pumping pump 21, and a first water level sensor 22. The pumping pipe 20 pumps raw water from the raw water supply source 100 to the primary water tank 10. One end of the pumping pipe 20 is inserted into the supply source 100, and the other end is opened toward the inside of the primary water tank 10. The pump 21 is installed in the pumping pipe 20 and is a power source for pumping raw water from the supply source 100. The first water level sensor 22 detects the water level of the water stored in the primary water tank 10. The first water level sensor 22 can detect, for example, two water levels, a high water level indicated by a solid line in the figure and a low water level indicated by a dotted line in the figure.

The water purification device 12 purifies by circulating raw water with the primary water tank 10. The water purification device 12 includes a circulation pipe 30, a plurality of parallel pipes 31, and a switching valve 32 as a piping system.

The circulation pipe 30 circulates water containing raw water. One end of the circulation pipe 30 is connected to the primary water tank 10 as a water inlet of the water purification device 12, and the other end is opened toward the inside of the primary water tank 10 as a circulating water discharge port of the water purification device 12. ..

The plurality of parallel pipes 31 are arranged in parallel with each other at an intermediate position of the circulation pipe 30, and each of the water circulating in the circulation pipe 30 is circulated. The number of parallel pipes 31 depends on the number of water supply pumps 40 installed, which will be described later. In this embodiment, as an example, five water supply pumps 40 are adopted. In this case, there are five plurality of parallel pipes 31, a first parallel pipe 31a, a second parallel pipe 31b, a third parallel pipe 31c, a fourth parallel pipe (not shown), and a fifth parallel pipe 31e.

The switching valve 32 switches so that the purified water flowing through the circulation pipe 30 is directed to the secondary water storage tank 14. Specifically, the switching valve 32 is a three-way solenoid valve in which the discharge port of the circulation pipe 30, the introduction port of the circulation pipe 30, and the introduction port of the outlet pipe 50, which will be described later, are connected to each other. Further, the switching operation of the switching valve 32 is controlled by the control unit 16.

Further, the water purification device 12 includes a water supply pump 40, a check valve 41, and a flow rate sensor 42 as elements installed in each of the parallel pipes 31. That is, there are a plurality of water supply pumps 40, check valves 41, and flow rate sensors 42, respectively.

The water supply pump 40 is a power source for pumping and sending raw water from the primary water tank 10. When the water purification supply range of the water treatment system 1 is medium-sized, if only one water pump 40 is installed in the water purification device 12, the water pump 40 is required to have high durability, for example. .. On the other hand, in the present embodiment, since a plurality of water supply pumps 40 are installed in the water purification device 12, each water supply pump 40 does not necessarily need to have high durability. Further, the operation of the plurality of water pumps 40 is controlled by the control unit 16, respectively.

In this embodiment, there are five water supply pumps 40 as an example. The water supply pump 40 installed in the first parallel pipe 31a is the first water supply pump 40a. Similarly, the water supply pump 40 installed in the second parallel pipe 31b is the second water supply pump 40b. The water supply pump 40 installed in the third parallel pipe 31c is the third water supply pump 40c. The water supply pump 40 installed in the fifth parallel pipe 31e is the fifth water supply pump 40e.

The check valve 41 is installed on the downstream side of the water supply pump 40 for each parallel pipe 31, and suppresses the backflow of water from the downstream side to the upstream side in the parallel pipe 31.

In this embodiment, there are five check valves 41 according to the number of water supply pumps 40 installed. The check valve 41 installed in the first parallel pipe 31a is the first check valve 41a. Similarly, the check valve 41 installed in the second parallel pipe 31b is the second check valve 41b. The check valve 41 installed in the third parallel pipe 31c is the third check valve 41c. The check valve 41 installed in the fifth parallel pipe 31e is the fifth check valve 41e.

The flow rate sensor 42 is installed on the downstream side of the water supply pump 40 for each parallel pipe 31, and detects the flow rate of water flowing through the parallel pipe 31. In the present embodiment, the flow rate sensor 42 has a role as an abnormality detection unit for detecting an abnormality in the water supply pump 40. Further, when the check valve 41 is installed for each of the parallel pipes 31 as in the example of the present embodiment, the check valve 41 is installed on the downstream side of the water supply pump 40.

In this embodiment, there are five flow rate sensors 42 according to the number of water supply pumps 40 installed. The flow rate sensor 42 installed in the first parallel pipe 31a is the first flow rate sensor 42a. Similarly, the flow rate sensor 42 installed in the second parallel pipe 31b is the second flow rate sensor 42b. The flow rate sensor 42 installed in the third parallel pipe 31c is the third flow rate sensor 42c. The flow rate sensor 42 installed in the fifth parallel pipe 31e is the fifth flow rate sensor 42e.

Further, the water purification device 12 includes a filtration tank 43 and an ozone injection unit 44 as a purification mechanism.

The filtration tank 43 filters the raw water. The filtration method is not particularly limited, but the filtration tank 43 may contain, for example, manganese sand as a filter medium. In the present embodiment, the filtration tank 43 is a part of the circulation pipe 30 in which the plurality of parallel pipes 31 merge on the downstream side, and one is installed on the upstream side of the switching valve 32. That is, in the present embodiment, in the water purification device 12, the number of installations of the filtration tank 43 is smaller than the number of installations of the water supply pump 40.

The ozone injection unit 44 is installed on the downstream side of the filtration tank 43 in the circulation pipe 30, and injects ozone as an oxidizing agent into the water that has passed through the filtration tank 43. Although not shown, the ozone injection unit 44 includes, for example, an ozone generator that uses a high voltage to generate ozone. The ozone injection unit 44 injects ozone generated by the ozone generator into the water circulating in the circulation pipe 30. Specifically, the ozone injection unit 44 may be a Venturi pipe installed in the circulation pipe 30. Alternatively, the ozone injection unit 44 may be an air pump that disperses ozone-containing air as fine bubbles in water from a porous member installed in the circulation pipe 30.

The secondary water storage tank 14 stores purified water purified by the water purification device 12. As elements related to the secondary water storage tank 14, the water treatment system 1 includes a lead-out pipe 50, a water distribution pipe 51, a water distribution pump 52, and a second water level sensor 53. The lead-out pipe 50 leads out purified water from the water purification device 12 to the secondary water storage tank 14. One end of the lead-out pipe 50 is connected to the switching valve 32 in the water purification device 12, and the other end is opened toward the inside of the secondary water storage tank 14. The water distribution pipe 51 distributes purified water from the secondary water tank 14 to each house 200. One end of the water distribution pipe 51 is connected to the secondary water storage tank 14, and the other end is branched and connected to each house. The water distribution pump 52 is installed in the water distribution pipe 51 and is a power source that sucks purified water from the secondary water storage tank 14 and distributes the water to each house side. The second water level sensor 53 detects the water level of purified water stored in the secondary water storage tank 14. The second water level sensor 53 can detect, for example, two water levels, a high water level indicated by a solid line in the figure and a low water level indicated by a dotted line in the figure.

FIG. 2 is a control block diagram related to the control unit 16. The control unit 16 controls the operation of the entire water treatment system 1 based on various information. The control unit 16 includes a CPU 60, a ROM 61, and a RAM 62.

The CPU (Central Processing Unit) 60 collectively executes various processes in the water treatment system 1. In this embodiment, the CPU 60 executes at least a water treatment program stored in a ROM (Read Only Memory) 61 or a RAM (Random Access Memory) 62. The ROM 61 or the RAM 62 is connected to the CPU 60 via a bus line. Further, the RAM 62 or another recording medium (not shown) separately connected to the CPU 60 via a bus line can temporarily store at least the operation information regarding the water purification device 12.

A power switch 64, an information input unit 65, a first water level sensor 22, a second water level sensor 53, and a plurality of flow rate sensors 42 are connected to the input side of the control unit 16. On the other hand, a pump 21, a plurality of water supply pumps 40, an ozone injection unit 44, a switching valve 32, and a display unit 66 are connected to the output side of the control unit 16. Further, a transmission / reception unit 67 is connected to the control unit 16 as an input / output unit. Note that these connections may be wired or wireless.

The power switch 64 is a switch for setting on / off of the entire water treatment system 1. The power switch 64 may be installed in a part of the water purification device 12.

The information input unit 65 is a device for an operator to input various information related to the operation of the water treatment system 1. The information input unit 65 may be a keyboard or a touch panel. In the present embodiment, the operator can input, for example, the circulation time to the information input unit 65. When the information input unit 65 is a touch panel type input unit, it may also be used as the display unit 66 described later.

The display unit 66 displays the operating status of the entire water treatment system 1. The display unit 66 may be, for example, always installed on an indoor wall, or may be a portable tablet type having a communication function.

The transmission / reception unit 67 transmits various information to the outside and receives various information from the outside via a communication network such as the Internet. The transmission / reception unit 67 is electrically connected to the control unit 16 regardless of whether it is wired or wireless. The transmission / reception unit 67 may be, for example, a communication router.

The host computer 70 manages the operation information used in the water treatment system 1. The operation information includes a water treatment program that defines a series of flows of the water treatment process described below. For example, the operation information includes an abnormality handling program executed by the control unit 16 in the abnormality handling step S305 in the purification step S102, which will be described later, and information on the circulation time referred to in the purification step S102. Further, the main body configuration of the water treatment system 1 including the primary water tank 10, the water purification device 12, and the secondary water tank 14 is basically in or near the area where a plurality of houses 200 to be distributed are present. Will be installed. On the other hand, the host computer 70 may be installed at a location farther than the main body configuration of the water treatment system 1. The business operator that provides the water treatment system 1 can update the operation information on the host computer 70. Further, the host computer 70 can transmit and receive operation information to and from the transmission / reception unit 67 installed on the main body configuration side of the water treatment system 1 via a communication network.

Next, the specific operation of the water treatment system 1 will be described.

FIG. 3 is a flowchart showing the flow of the water treatment process in the water treatment system 1. The water treatment step in the present embodiment includes a primary water storage step S101, a purification step S102, a secondary water storage step S103, and a water distribution step S104. The primary water storage step S101 is a step of storing raw water in the primary water storage tank 10. The purification step S102 is a step of circulating and purifying the raw water stored in the primary water storage step S101 between the primary water storage tank 10 and the water purification device 12. The secondary water storage step S103 is a step of storing the purified water purified in the purification step S102 in the secondary water storage tank 14. Further, the water distribution step S104 is a step of distributing the purified water stored in the secondary water storage step S103 from the secondary water storage tank 14 to each house 200. The water treatment process is started when the operator turns on the power switch 64.

FIG. 4 is a flowchart showing the flow of the primary water storage step S101. When the primary water storage step S101 is started, first, the control unit 16 determines whether the raw water in the primary water storage tank 10 is below the low water level, that is, whether the first water level sensor 22 emits a predetermined low water level signal. Is determined (step S201).

Here, when the control unit 16 determines in step S201 that the first water level sensor 22 is emitting a low water level signal (YES), the control unit 16 then starts the operation of the pump 21 to start the operation from the supply source 100. The raw water is pumped up and stored in the primary water tank 10 (step S202). Next, the control unit 16 determines whether the raw water in the primary water tank 10 exceeds the high water level, that is, whether the first water level sensor 22 emits a predetermined high water level signal (step S203). Then, when the control unit 16 determines in step S203 that the first water level sensor 22 is emitting a high water level signal (YES), the control unit 16 stops the operation of the pump 21 (step S204), and performs the primary water storage step. finish.

On the other hand, when the control unit 16 determines in step S201 that the first water level sensor 22 does not emit a low water level signal (NO), the control unit 16 then determines that the first water level sensor 22 emits a high water level signal. It is determined whether or not it is emitted (step S205). Here, when the control unit 16 determines that the first water level sensor 22 does not emit a high water level signal (NO), the process proceeds to step S202. On the other hand, when the control unit 16 determines that the first water level sensor 22 is emitting a high water level signal (YES), the control unit 16 ends the primary water storage process without operating the pump 21.

FIG. 5 is a flowchart showing the flow of the purification step S102. In the purification step S102, the water purification device 12 circulates water containing raw water with the primary water tank 10 for a certain period of time. The time for circulating water between the primary water tank 10 and the water purification device 12 is hereinafter referred to as "circulation time". The control unit 16 first determines whether or not the circulation time has been input (step S301). Here, when the control unit 16 determines that the circulation time has not been input (NO), the control unit 16 sets the circulation time by the following means (step S302).

As the first setting means of the circulation time in step S302, the control unit 16 may set by receiving the operation information regarding the circulation time predetermined by the host computer 70 via the transmission / reception unit 67. As a second setting means of the circulation time, the control unit 16 prompts the worker to input the circulation time by displaying a comment on the display unit 66, for example, and the worker inputs the information input unit 65. What is input via may be set as the circulation time. Alternatively, as a third setting means of the circulation time, although not shown, by installing the water quality sensor in the primary water tank 10, the control unit 16 is based on the water quality value of the raw water detected by the water quality sensor. The circulation time may be set automatically.

Next, when the control unit 16 determines that the circulation time has been input in step S301 (YES), or when the circulation time is set in step S302, the control unit 16 starts the operation of the water purification device 12. (Step S303). Specifically, first, the control unit 16 switches the switching valve 32 so that water circulates in the circulation pipe 30. Next, the control unit 16 starts the operation of all the water supply pumps 40, and also starts the operation of the ozone injection unit 44. As a result, purification of the raw water in the primary water tank 10 proceeds.

Along with the purification process by the water purification device 12, the control unit 16 acquires the flow rate values detected by all the flow rate sensors 42 at all times or at a specific timing, and determines whether or not the normal values are maintained (step S304). ). Here, in the present embodiment, five water pumps 40 and five flow rate sensors 42 corresponding to each water pump 40 are installed in five parallel pipes 31 which are different from each other. Therefore, for example, when the control unit 16 determines that the flow rate value detected by the second flow rate sensor 42b installed in the second parallel pipe 31b deviates from the normal value, it is installed in the second parallel pipe 31b. It is predicted that an abnormality has occurred in the second water supply pump 40b.

Here, when the control unit 16 determines in step S304 that the flow rate value of any of the flow rate sensors 42 deviates from the normal value (NO), the control unit 16 executes the following abnormality handling step (step S305).

As the first abnormality handling step, the control unit 16 may display the abnormality of the water supply pump 40 on the display unit 66. At this time, in the present embodiment, since a plurality of flow rate sensors 42 corresponding to each of the plurality of water pumps 40 are adopted, an abnormality has occurred based on the detection result of the flow rate sensor 42 as described above. The water supply pump 40 can be specified. Therefore, in addition to the fact that the water supply pump 40 has an abnormality, for example, the control unit 16 causes the display unit 66 to display which water supply pump 40 has the abnormality.

As a second abnormality handling step, the control unit 16 may change the already set circulation time by changing the switching timing of the switching valve 32 as an alternative operation of the water purification device 12. Here, the already set circulation time means the circulation time input in advance at the start of the purification step S102 or the circulation time set in step S302. In the water purification device 12 of the present embodiment, the circulation of water containing raw water is continued while the switching valve 32 is not switched.

Here, for example, it is assumed that the preset circulation time is 60 minutes. This circulation time is set on the assumption that all the water pumps 40 are operating normally. On the other hand, when an abnormality occurs in any of the water pumps 40, if the circulation time is left as it is, the purification performance of the water purification device 12 as a whole may deteriorate. Therefore, the control unit 16 extends the circulation time to be longer than 60 minutes when it is determined that an abnormality has occurred in any of the water supply pumps 40. Specifically, the control unit 16 delays the switching timing of the switching valve 32 by the extension of the circulation time from the initial setting. Subsequent switching step S402 of the switching valve 32 included in the secondary water storage step S103 is performed at the switching timing newly defined here.

As a third abnormality handling step, the control unit 16 may change the operating conditions of the water supply pump 40 different from the water supply pump 40 identified as having an abnormality as an alternative operation of the water purification device 12. .. The normal operating conditions of all the water pumps 40 are set on the assumption that all the water pumps 40 are operating normally. On the other hand, when an abnormality occurs in any of the water supply pumps 40, if the operating conditions of the water supply pump 40 in which no abnormality has occurred are left as they are, the purification performance of the water purification device 12 as a whole may deteriorate. There is. Therefore, the control unit 16 changes the operating conditions of the remaining other water supply pumps 40 in accordance with the determination that an abnormality has occurred in one of the water supply pumps 40, so that the water supply pump 40 minutes in which the abnormality has occurred. The water supply capacity of the above is supplemented by another water supply pump 40. Here, the operating condition of the water supply pump 40 is, for example, a discharge amount.

In the abnormality handling step S305, any one of the above-exemplified first to third abnormality handling steps may be carried out, or a plurality of abnormality handling steps among the first to third abnormality handling steps may be performed. The steps may be carried out together.

Next, the control unit 16 determines whether or not the circulation time set at the present time has elapsed (step S306). Here, when the control unit 16 determines that the circulation time has elapsed (YES), the operation of the ozone injection unit 44 is stopped (step S307), and the purification step S102 is terminated. Since the water supply pump 40 is used as a power source for transferring purified water to the secondary water storage tank 14 in the subsequent secondary water storage step S103, it may be continuously operated at this time.

FIG. 6 is a flowchart showing the flow of the secondary water storage step S103. When the secondary water storage step S103 is started, first, the control unit 16 issues a low water level signal predetermined by the second water level sensor 53, that is, whether the purified water in the secondary water storage tank 14 is below the low water level. It is determined whether or not there is (step S401).

Here, when the control unit 16 determines in step S401 that the second water level sensor 53 is emitting a low water level signal (YES), the purified water in the primary water tank 10 is then transferred to the secondary water tank 14. The switching valve 32 is switched so as to face the water, and the water is stored in the secondary water tank 14 (step S402). Next, the control unit 16 determines whether the purified water in the primary water tank 10 is below the low water level, that is, whether the first water level sensor 22 is emitting a low water level signal (step S403). Then, when the control unit 16 determines in step S403 that the first water level sensor 22 is emitting a low water level signal (YES), the control unit 16 stops the operation of all the water supply pumps 40 (step S404), and secondary The water storage step S103 is completed.

On the other hand, when the control unit 16 determines in step S401 that the second water level sensor 53 does not emit a low water level signal (NO), the control unit 16 then determines that the second water level sensor 53 emits a high water level signal. It is determined whether or not it is emitted (step S405). Here, when the control unit 16 determines that the second water level sensor 53 does not emit a high water level signal (NO), the process proceeds to step S402. On the other hand, when the control unit 16 determines that the second water level sensor 53 is emitting a high water level signal (YES), the secondary water tank 14 does not have a new volume for storing purified water, so step S404 And the secondary water storage step S103 is completed.

Then, in the water distribution step S104, the control unit 16 operates the water distribution pump 52 to suck up purified water from the secondary water storage tank 14 and distribute it to each house 200 via the water distribution pipe 51.

Next, the handling of operation information in the water treatment system 1 will be described.

As the first handling, the operation information may be stored in a recording medium in the control unit 16 in advance without going through the host computer 70, and may be executed or referred to by the control unit 16. In this case, for example, when changing the abnormality handling program executed in the abnormality handling step S305 or the operation information related to the circulation time referred to in the purification step S102, the operator directly changes the operation information via the information input unit 65. It will be. That is, when the first handling is adopted, the host computer 70 is not an essential configuration in the water treatment system 1.

As an example of changing the operation information, it is assumed that the second abnormality coping step is adopted in the abnormality coping step of step S305. Then, in the initial setting, the circulation time is, for example, 60 minutes, and it is stipulated that the circulation time is changed to, for example, 70 minutes when an abnormality occurs in any of the water supply pumps 40. On the other hand, the operator may rewrite the operation information via the information input unit 65, such as changing the circulation time to, for example, 75 minutes when an abnormality occurs in any of the water pumps 40. Good. Alternatively, when the preset circulation time is 60 minutes, the operator may change it to, for example, 65 minutes via the information input unit 65.

As a second handling, the operation information used in the water treatment system 1 may be determined on the host computer 70 side. In this case, the control unit 16 acquires the operation information from the host computer 70 via the transmission / reception unit 67, stores it in the recording medium in the control unit 16, and executes or refers to it as appropriate. Then, when the operation information is updated in the host computer 70, the control unit 16 updates the operation information by repeating the same process. The example in which the operation information is changed is the same as that described in the first handling.

Here, for example, the connection relationship between the host computer 70 and the transmission / reception unit 67 installed on the main body configuration side of the water treatment system 1 can be considered as follows.

As the first connection relationship, the host computer 70 and the transmission / reception unit 67 may be connected one-to-one in one water treatment system 1. In this case, the host computer 70 is a host computer dedicated to one water treatment system 1 that distributes water to a plurality of houses in a certain area.

As a second connection relationship, one host computer 70 centrally manages a plurality of main body configurations of the water treatment system 1 which separately handles water distribution to a plurality of houses in different areas by using IoT (Internet of Things) technology. It may be a thing.

FIG. 7 is a schematic view showing a management system 80 that manages a plurality of main body configurations of the water treatment system 1. In FIG. 7, as a plurality of main body configurations of the water treatment system 1, three main body configurations that are responsible for water distribution in each of the three regions are illustrated. The first main body configuration 1A is responsible for distributing water to a plurality of houses 200 in the first area. Similarly, the second main body configuration 1B is responsible for distributing water to a plurality of houses 210 in the second area. The third main body configuration 1C is responsible for distributing water to a plurality of houses 220 in the third area. The components included in each of the first main body configuration 1A to the third main body configuration 1C are basically the same.

In the example of the management system 80 shown in FIG. 7, the host computer 70 operates between the transmission / reception unit 67 included in each of the first main body configuration 1A to the third main body configuration 1C via a communication network 81 such as the Internet. Information can be sent and received. In this case, the host computer 70 can set appropriate operation information for each region by referring to, for example, the number of houses responsible for water distribution and the water intake status from raw water as a characteristic of the region.

On the other hand, the control unit 16 included in each of the first main body configuration 1A to the third main body configuration 1C hosts the operation information regarding the abnormality caused by the water supply pump 40 in the main body configuration from the transmission / reception unit 67 via the communication network 81. It may be transmitted to the computer 70. In this case, the transmitted operation information is, for example, the fact information that the flow rate value deviates from the normal value in step S304, or the water supply pump 40 identified as having an abnormality based on the determination result in step S304. Specific information, etc. On the other hand, the host computer 70 can set new operation information based on the information transmitted and received from any of the transmission / reception units 67 of the first main body configuration 1A to the third main body configuration 1C. At this time, the host computer 70 accumulates operation information regarding the abnormality of the water supply pump 40 that has occurred in each of the first main body configuration 1A to the third main body configuration 1C, and refers to it when setting new operation information. Can be done. That is, the host computer 70 may determine the information instructing the alternative operation of the water purification device 12 in one area based on the operation information of the water purification device 12 installed in another area.

The host computer 70 may determine that recovery is difficult only by the alternative operation of the water purification device 12 based on the information transmitted from the transmission / reception unit 67 of the first main body configuration 1A to the third main body configuration 1C. .. In such a case, the host computer 70 may automatically notify the maintenance company who can handle the repair of the occurrence of the abnormality.

Next, the effects of the water treatment system 1 and the water treatment method will be described.

First, the water treatment system 1 according to the present embodiment is purified by a water purification device 12 that circulates and purifies the raw water between the primary water storage tank 10 that stores the raw water and the primary water storage tank 10, and a water purification device 12. It is provided with a secondary water storage tank 14 for storing purified water. The water purification device 12 is installed in each of a circulation pipe 30 for circulating water containing raw water, a plurality of parallel pipes 31 connected to the circulation pipe 30, and the parallel pipe 31, and pumps raw water from the primary water tank 10. A plurality of water supply pumps 40 for sending and a filtration tank 43 for filtering raw water are provided. The number of installations of the filtration tank 43 is smaller than the number of installations of the water supply pump 40.

Alternatively, in the water treatment method according to the present embodiment, the raw water stored in the primary water storage tank 10 is circulated between the primary water storage tank 10 and the water purification device 12 and the raw water stored in the primary water storage step S101 is circulated. It includes a purification step S102 for purifying. Further, the water treatment step includes a secondary water storage step S103 in which the purified water purified in the purification step S102 is stored in the secondary water storage tank 14. In the purification step S102, a plurality of water supply pumps 40 installed in each of the plurality of parallel pipes 31 connected to the circulation pipe 30 for circulating water including raw water draw out the raw water from the primary water tank 10 and send it. Subsequently, in the purification step S102, the raw water is filtered by passing through the filtration tanks 43 having a smaller number of installations than the water supply pump 40.

Generally, in a water treatment system in which raw water is purified by passing it through a filtration tank only once, the filtration tank is selected so as to satisfy filtration conditions such as linear velocity (LV) and space velocity (SV). .. Here, the linear velocity means the velocity of raw water passing through the cross-sectional area of the filtration tank per unit time. Spatial velocity is the reciprocal of the time that raw water comes into contact with the filtration tank per unit time. On the other hand, in the water treatment system 1 and the water treatment method according to the present embodiment, the raw water is circulated between the primary water storage tank 10 and the water purification device 12, that is, the raw water is passed through the filtration tank 43 a plurality of times. Purify by letting. Therefore, the filtration tank 43 can be selected without significantly depending on the linear velocity and the space velocity without deteriorating the purification performance, and as a result, the filtration tank of the water treatment system in which the raw water is passed only once can be selected. It can be miniaturized.

In general, assuming that the water purified by one water treatment system is distributed to a plurality of houses, if only one water pump is used, for example, the load on the water pump is considered to be high. It is necessary to select a high-performance one with durability. On the other hand, in the water treatment system 1 and the water treatment method according to the present embodiment, water containing raw water is circulated by using a plurality of water pumps 40. Therefore, as the individual water supply pump 40, higher performance than the water supply pump when only one is used in the water treatment system is not required, so that a relatively inexpensive pump can be applied. Further, even if an abnormality occurs in some of the plurality of water supply pumps 40, the remaining water supply pumps 40 operate, so that the purification process can be continued without stopping the entire water treatment system 1. ..

Further, in the water treatment system 1 and the water treatment method according to the present embodiment, the number of installations of the filtration tank 43 is smaller than the number of installations of the water supply pump 40. The increase in maintenance cost can be suppressed.

As described above, according to the present embodiment, it is possible to provide a water treatment system and a water treatment method that are advantageous in terms of cost while maintaining purification performance.

Further, in the water treatment system 1, the filtration tank 43 may be installed in a part of the circulation pipe 30 in which a plurality of parallel pipes 31 merge on the downstream side.

Here, as shown in FIG. 1, a part of the circulation pipe 30 in which the plurality of parallel pipes 31 merge on the downstream side is connected to the switching valve 32 side of the connection portions with the plurality of parallel pipes 31. A part of the circulation pipe 30 on the side.

According to such a water treatment system 1, all the water sent by any one of the plurality of water supply pumps 40 goes to the filtration tank 43, so that the circulating water surely passes through the filtration tank 43. Can be made to. Further, since it is installed in a part of the circulation pipe 30 in one round, it is sufficient that at least one filter tank 43 is installed, and as a result, an increase in the number of filter tanks 43 installed can be suppressed.

In the water treatment system 1, in addition to installing the filtration tank 43 in a part of the circulation pipe 30 in which the plurality of parallel pipes 31 merge on the downstream side, an auxiliary is provided to any one of the plurality of parallel pipes 31. A filtration tank may be added to carry out specific filtration. In this case, the auxiliary filtration tank is installed at least on the downstream side of the water supply pump in the parallel pipe 31.

Further, in the water treatment system 1, the water purification device 12 may include an ozone injection unit 44 that injects ozone into the water that has passed through the filtration tank 43.

Generally, in a water treatment system that purifies raw water by passing it through a filtration tank only once, a chlorine agent as an oxidant may be injected into the raw water as a treatment for the raw water before it passes through the filtration tank. There are many. However, when using chlorinated chemicals, there are many points to be taken, such as over-injection, labor for replenishment, and measures against chloric acid related to storage stability during storage. On the other hand, according to such a water treatment system 1, since ozone is used as an oxidant, it is not necessary to take measures against overinjection and replenishment, and the running cost is lower than when a chlorine chemical is used. can do.

Here, as the ozone injection unit 44, it is desirable to use a Venturi pipe installed in the circulation pipe 30. By adopting the Venturi tube method as the ozone injection method, the device configuration is simplified by eliminating the need for a device such as an air pump, and the reaction efficiency between raw water and ozone is improved.

Further, in the water treatment system 1, the water purification device 12 may include a check valve 41 installed on the downstream side of the water supply pump 40 in each of the plurality of parallel pipes 31.

According to such a water treatment system 1, even if an abnormality occurs in any of the water pumps 40 installed in the parallel pipes 31 and the operation is stopped, the check valve 41 operates. , The backflow of water from the downstream side to the upstream side of the water supply pump 40 can be suppressed.

Further, the water treatment system 1 may include a lead-out pipe 50 for leading the purified water purified by the water purification device 12 to the secondary water storage tank 14. In this case, the water purification device 12 is connected to a part of the circulation pipe 30 on the downstream side of the water supply pump 40 and the outlet pipe 50, and is a switching valve that switches the purified water flowing through the circulation pipe 30 toward the outlet pipe 50. 32 may be provided.

According to such a water treatment system 1, the flow of water in the purification step S102 for circulating in the circulation pipe 30 and the flow of water in the secondary water storage step S103 for leading the purified water to the secondary water storage tank 14. Can be changed only by switching the switching valve 32. Further, in this case, the plurality of water supply pumps 40 are not only a power source for circulating water in the circulation pipe 30, but also a power source for deriving purified water from the water purification device 12 to the secondary water storage tank 14. .. That is, according to such a water treatment system 1, it is not necessary to separately install a pump specialized for deriving purified water from the water purification device 12 to the secondary water storage tank 14, so that the configuration of the water treatment system 1 is configured. It can be simplified more.

Further, the water treatment system 1 may include a control unit 16 that controls the operation of the water purification device 12. In this case, the water purification device 12 may include an abnormality detection unit that detects an abnormality in the water supply pump 40. Further, the control unit 16 may control the operation of the water purification device 12 based on the detection result of the abnormality detection unit.

In particular, when one water treatment system covers the distribution of water to multiple homes, the fact that the water pump malfunctions and the raw water cannot be purified normally means that more homes will be affected. , Not desirable. On the other hand, according to such a water treatment system 1, since the abnormality detection unit detects that an abnormality has occurred in the water supply pump 40, it is advantageous for speeding up the recovery of the water supply pump 40 in which the abnormality has occurred. .. Further, since the control unit 16 controls the operation of the water purification device 12 based on the detection result of the abnormality detection unit, the operation of the water purification device 12 when an abnormality occurs in the water supply pump 40 can be set in advance. If so, it is possible to quickly shift to an alternative operation.

Further, in the water treatment system 1, the abnormality detection unit may be a flow rate sensor 42 that detects the flow rate of water flowing through the circulation pipe 30 or the parallel pipe 31.

When an abnormality occurs in the water supply pump 40, the flow rate of water flowing through the circulation pipe 30 or the parallel pipe 31 changes from the normal state. According to such a water treatment system 1, since the circulation pipe 30 or the parallel pipe 31 is provided with a flow rate sensor 42 for detecting the flow rate of water as an abnormality detection unit, it is possible to detect an abnormality in the water supply pump 40 with a simple configuration. Can be done.

Further, in the water treatment system 1, the abnormality detection unit may be installed in each of the plurality of parallel pipes 31.

Since the water supply pump 40 is installed in each of the plurality of parallel pipes 31, when an abnormality detection unit detects an abnormality, it is installed together with the parallel pipe 31 in which the abnormality detection unit that detects the abnormality is installed. It can be predicted that an abnormality has occurred in the water supply pump 40.

Instead of being installed in each of the plurality of parallel pipes 31, the abnormality detection unit may be provided, for example, only one on the downstream side of the filtration tank 43 of the circulation pipe 30. In this case, it is difficult to identify which of the plurality of water supply pumps 40 has an abnormality, but it can be predicted that at least one of the water supply pumps 40 has an abnormality.

Further, the abnormality detection unit may be, for example, a pressure sensor instead of the flow rate sensor 42 illustrated above. When an abnormality occurs in the water supply pump 40, the water pressure in the circulation pipe 30 or the parallel pipe 31 also changes from the normal state. Therefore, even if the pressure sensor detects the water pressure, the abnormality of the water supply pump 40 is detected with a simple configuration. can do.

Further, in the water treatment system 1, the water purification device 12 may include a display unit 66 that displays an abnormality of the water supply pump 40. In this case, the control unit 16 may display the abnormality of the water supply pump 40 on the display unit 66 based on the detection result of the abnormality detection unit.

According to such a water treatment system 1, the operator can recognize the fact that an abnormality has occurred in the water supply pump 40 by the display of the display unit 66, so that the water treatment system 1 can be quickly restored. It will be advantageous for.

Further, in the water treatment system 1, the control unit 16 may change the switching timing of the switching valve 32 based on the detection result of the abnormality detection unit.

When the switching timing of the switching valve 32 is changed, the circulation time is also changed. Therefore, according to such a water treatment system 1, when an abnormality occurs in any of the water pumps 40, the circulation time is not changed by changing the switching timing of the switching valve 32 and changing the circulation time. It is possible to suppress a decrease in purification performance more than in the case.

Further, in the water treatment system 1, the control unit 16 identifies the water supply pump 40 installed in the parallel pipe 31 in which the abnormality detection unit that has detected the abnormality exists as the water supply pump 40 in which the abnormality has occurred. May be good.

According to such a water treatment system 1, it is possible to easily identify which of the plurality of water pumps 40 has an abnormality.

Further, in the water treatment system 1, the control unit 16 may change the operating conditions of the water supply pump 40 different from the water supply pump 40 identified as having an abnormality.

According to such a water treatment system 1, when an abnormality occurs in any of the water supply pumps 40, the operating conditions of the remaining other water supply pumps 40 are changed to cause the abnormality in the water supply pump 40 minutes. The water supply capacity of the above can be supplemented by another water supply pump 40. That is, when an abnormality occurs in any of the water supply pumps 40, the deterioration of the purification performance can be suppressed as compared with the case where the operating conditions of all the water supply pumps 40 are not changed.

Further, the water treatment system 1 includes a host computer 70 that manages and transmits / receives operation information of the water purification device 12, and a transmission / reception unit 67 that transmits / receives operation information to / from the host computer 70 via a communication network. May be good. In this case, the transmission / reception unit 67 may transmit the information regarding the water pump 40 in which the abnormality has occurred acquired from the control unit 16 to the host computer 70 as operation information.

According to such a water treatment system 1, the host computer 70 can manage the operation information transmitted from the transmission / reception unit 67. Further, the host computer 70 can refer to the operation information transmitted from the transmission / reception unit 67 in order to determine an alternative operation of the water purification device 12 when an abnormality occurs in the water supply pump 40.

Further, in the water treatment system 1, the host computer 70 may transmit information indicating an alternative operation of the water purification device 12 when an abnormality occurs in the water supply pump 40 to the transmission / reception unit 67 as operation information. In this case, the control unit 16 includes a recording medium for storing the operation information transmitted from the host computer 70, and even if the operation of the water purification device 12 is controlled based on the operation information stored in the recording medium. Good.

Here, the recording medium is, for example, RAM 62.

According to such a water treatment system 1, the control unit 16 makes the alternative operation of the water purification device 12 optimal based on the operation information transmitted from the host computer 70, not always constant. it can.

Further, in the water treatment system 1, the host computer 70 obtains information instructing an alternative operation of the water purification device 12 based on the operation information of the water purification device installed in another area other than the water purification device 12. You may decide.

According to such a water treatment system 1, when the host computer 70 determines the alternative operation of the water purification device 12, the abnormality that has previously occurred in the water purification device 12 installed in another area and its countermeasures. Refer to. As a result, the accuracy of the operation information including the newly set alternative operation can be further improved.

In the above description, it is assumed that the purified water purified by the water treatment system 1 is used as domestic water in each house 200 or the like. On the other hand, the water treatment system 1 may be modified so that the purified water purified by the water treatment system 1 is suitable for being used as drinking water in each house 200 or the like. For example, in the water treatment system 1, a filter may be provided between the secondary water storage tank 14 and the water distribution pump 52 to further filter the purified water transferred from the secondary water storage tank 14 for drinking.

Further, in the above description, the primary water tank 10 and the secondary water tank 14 are each represented as one in FIG. 1, but they may actually be composed of a plurality of tanks.

Although the preferred embodiment has been described above, the present embodiment is not limited to this, and various modifications and changes can be made within the scope of the gist thereof.

1 Water treatment system 10 Primary water storage tank 12 Water purification device 14 Secondary water storage tank 16 Control unit 30 Circulation piping 31 Parallel piping 32 Switching valve 40 Water supply pump 41 Check valve 42 Flow sensor 43 Filter tank 44 Ozone injection unit 50 Derived piping 62 RAM
66 Display unit 67 Transmission / reception unit 70 Host computer

Claims (16)

A primary water tank that stores raw water,
A water purification device that circulates and purifies the raw water between the primary water tank and the water purification tank.
A secondary water tank that stores purified water purified by the water purification device,
With
The water purification device
A circulation pipe that circulates water containing raw water,
A plurality of parallel pipes connected to the circulation pipe and
A plurality of water pumps installed in each of the parallel pipes to pump and send the raw water from the primary water tank.
A filtration tank for filtering the raw water is provided.
A water treatment system in which the number of installed filtration tanks is smaller than the number of installed water pumps. The water treatment system according to claim 1, wherein the filtration tank is installed in a part of the circulation pipe in which the plurality of parallel pipes meet on the downstream side. The water treatment system according to claim 1 or 2, wherein the water purification device includes an ozone injection unit that injects ozone into the water that has passed through the filtration tank. The water treatment system according to any one of claims 1 to 3, wherein the water purification device includes a check valve installed on the downstream side of the water supply pump in each of the plurality of parallel pipes. It is provided with a lead-out pipe for leading the purified water purified by the water purification device to the secondary water storage tank.
The water purification device includes a part of the circulation pipe on the downstream side of the water supply pump and a switching valve which is connected to the outlet pipe and switches the purified water flowing through the circulation pipe toward the outlet pipe. , The water treatment system according to any one of claims 1 to 4. A control unit that controls the operation of the water purification device is provided.
The water purification device includes an abnormality detection unit that detects an abnormality in the water supply pump.
The water treatment system according to claim 5, wherein the control unit controls the operation of the water purification device based on the detection result of the abnormality detection unit. The water treatment system according to claim 6, wherein the abnormality detection unit is a flow rate sensor that detects the flow rate of the water flowing through the circulation pipe or the parallel pipe. The water treatment system according to claim 6 or 7, wherein the abnormality detection unit is installed in each of the plurality of parallel pipes. The water purification device includes a display unit that displays an abnormality of the water supply pump.
The water treatment system according to any one of claims 6 to 8, wherein the control unit displays an abnormality of the water supply pump on the display unit based on the detection result of the abnormality detection unit. The water treatment system according to any one of claims 6 to 8, wherein the control unit changes the switching timing of the switching valve based on the detection result of the abnormality detection unit. Any of claims 8 to 10, wherein the control unit identifies the water supply pump installed in the parallel pipe in which the abnormality detection unit that has detected an abnormality exists as the water supply pump in which the abnormality has occurred. The water treatment system according to item 1. The water treatment system according to claim 11, wherein the control unit changes the operating conditions of the water pump other than the water pump identified as having an abnormality. A host computer that manages and sends and receives operation information of the water purification device,
A transmission / reception unit that transmits / receives the operation information to / from the host computer via a communication network.
With
The water treatment system according to any one of claims 6 to 12, wherein the transmission / reception unit transmits information about the water pump having an abnormality acquired from the control unit to the host computer as the operation information. .. The host computer transmits information instructing an alternative operation of the water purification device when an abnormality occurs in the water supply pump to the transmission / reception unit as the operation information.
The control unit includes a recording medium for storing the operation information transmitted from the host computer, and controls the operation of the water purification device based on the operation information stored in the recording medium. 13. The water treatment system according to 13. 14. The host computer determines the information instructing an alternative operation of the water purification device based on the operation information of the water purification device installed in another area other than the water purification device, according to claim 14. The water treatment system described. The primary water storage process that stores raw water in the primary water tank,
A purification step of circulating and purifying the raw water stored in the primary water storage process between the primary water storage tank and a water purification device.
The secondary water storage process, in which the purified water purified in the purification process is stored in the secondary water storage tank,
Including
In the purification step, a plurality of water pumps installed in each of a plurality of parallel pipes connected to a circulation pipe for circulating water containing the raw water pump out the raw water from the primary water tank and send the raw water to the water. A water treatment method in which the raw water is filtered by passing through a filter tank having a smaller number of installations than a pump.

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