WO2019156012A1

WO2019156012A1 - Water treatment device

Info

Publication number: WO2019156012A1
Application number: PCT/JP2019/003801
Authority: WO
Inventors: 太輔五百崎; 真二郎野間; 廣田　達哉; 藤田　浩史; ゆうこ丸尾; 真治西尾
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2018-02-09
Filing date: 2019-02-04
Publication date: 2019-08-15
Also published as: JPWO2019156012A1

Abstract

A water treatment device (1000) comprises a raw water flow channel (10), a chemical supply unit (100), a chemically treated water flow channel (20), a filtration unit (200), a reverse-flow cleaning water flow channel (30), a discharge flow channel (45), a first switching valve (V1), a second switching valve (V2), and a waste water opening/closing valve (V3). The reverse-flow cleaning water flows through the raw water flow channel (10), the first switching valve (V1), the reverse-flow cleaning water flow channel (30), the second switching valve (V2), a filtered water flow channel (40), the filtration unit (200), the chemically treated water flow channel (20), the discharge flow channel (45), the waste water opening/closing valve (V3), and a discharge opening (50), in the stated order, without passing through the chemical supply unit (100).

Description

Water treatment equipment

The present disclosure relates to a water treatment apparatus including a chemical supply unit and a filtration unit.

Conventionally, development of a water treatment apparatus including a drug supply unit having a drug therein and a filter unit having a filter medium therein has been performed. In this water treatment apparatus, a chemical supply unit may be disposed upstream of the filtration unit. In this case, first, sterilization treatment and oxidation treatment of the water to be treated are performed by the chemicals supplied from the chemical supply unit to the water to be treated, such as ozone or a chlorine agent. Then, the to-be-processed water containing a chemical | medical agent flows into a filtration part, and the to-be-processed water filtration process is performed.

In the conventional water treatment apparatus described above, in order to remove the deposits adhering to the filter medium in the filtration unit, the filter medium is washed by flowing water in the direction opposite to the forward flow in the filter tank, so-called reverse flow. A structure for cleaning is provided (see Patent Document 1).

Japanese Utility Model Publication No. 63-130198

According to the conventional backwashing structure of the water treatment device disclosed in Patent Document 1 described above, when the backwashing is to be performed, the backwashing water passes through the chemical supply unit, and then the backwashing water is used. It flows downstream of the filtration part via the flow path. Thereafter, the water for backflow cleaning flows from the downstream side of the filtration unit to the upstream side of the filtration unit in a direction opposite to the direction of water flow during normal use.

Therefore, in the above water treatment apparatus, when backwashing is performed, backwashing water flows not only into the filtration unit but also into the chemical supply unit. As a result, at the time of backwashing, not only the deposits on the filter medium but also the chemicals are discharged from the outlet together with the water for backwashing. This water for backwashing is discharged from the outlet.

However, in the above-described conventional water treatment apparatus, during normal use, the filtration unit performs cleaning using the medicine by flowing the medicine-treated water containing the medicine supplied from the upstream medicine supply unit. Already applied to the filter media. Therefore, if the chemical-treated water mixed with the chemical is supplied to the filtration unit even during backwashing, the chemical is wasted.

The present disclosure has been made in view of such problems of the conventional technology. And the objective of this indication is providing the water treatment apparatus which can suppress that a chemical | medical agent is consumed wastefully by backflow washing | cleaning.

In order to solve the above-described problem, a water treatment apparatus according to the first aspect of the present disclosure is provided to receive raw water from the raw water flow path that guides raw water and the raw water flow path, and supplies a chemical to the raw water A chemical supply water channel that guides the chemical-treated water supplied with the chemical flowing out from the chemical supply unit, and the chemical-treated water flowing through the chemical-treated water flow channel. A filtration unit having a filter medium for filtering the chemical-treated water, a filtered water channel for guiding the filtered water that has flowed out of the filtration unit, and the raw water flow A backwashing water channel that is connected to the channel and the filtered water channel and guides water for backwashing from the raw water channel to the filtered water channel, and a connection part between the raw water channel and the backwashing water channel Provided in front of the raw water flow path The first normal state in which the raw water is guided to the chemical supply unit, and the first reverse flow cleaning state in which the water for backwashing is guided from the raw water channel to the backwashing water channel. A second normal state that is provided at a connection portion between the switching valve, the filtered water flow path, and the backwash water flow path, and that guides the filtered water from the filtration section to the outlet, and the backwash water flow path A second switching valve that is switched to one of the second back-flow cleaning states that guides the water for back-flow cleaning to the filtration unit via the filtered water flow path, and the chemical-treated water flow path. A closed state in which the chemical-treated water flowing through the chemical-treated water flow channel is guided to the filtration unit, and the backwash water flowing through the chemical-treated water flow channel Any open state leading to the outlet of the discharge channel A drain-off valve which is switched on or is provided with a.

A water treatment apparatus according to a second aspect of the present disclosure includes a raw water channel that guides raw water, a chemical supply unit that is provided so that the raw water flows from the raw water channel, and supplies a chemical to the raw water, and the chemical A drug-treated water channel for guiding the drug-treated water supplied with the drug flowing out from the supply unit; and the drug-treated water channel configured to receive the drug-treated water flowing in the drug-treated water channel. A filtration part having a filtering material for subjecting the water to filtration, a filtered water flow path for guiding filtered water that has flowed out of the filtration part, the raw water flow path, and the filtered water flow path; Connected to the raw water flow path, the reverse flow cleaning water flow path for guiding the water for back flow cleaning from the raw water flow path to the filtered water flow path, and a connecting portion between the raw water flow path and the reverse flow cleaning water flow path, The raw water is guided to the medicine supply unit from A switching valve that is switched to a normal state and a backwashing state that guides the water for backwashing from the raw water channel to the backwashing water channel, and the filtered water channel and the backwashing water channel. Provided in the filtered water flow path downstream of the filtered water with respect to the connection part, and a normal open state for guiding the filtered water from the filtering part to the outlet through the filtered water flow path, And a backwashing on / off valve for switching backwashing that switches the backwashing water from the backwashing water channel to the filtration unit via the filtered water channel to the backwashing closed state, and the chemical treatment A closed state for normal use for guiding the drug-treated water flowing through the drug-treated water flow path to the filtration unit, and a flow through the drug-treated water flow path. The backwash water Serial and discharge passage for drainage off valve is switched to either an open state for backwash leading to outlet, and a.

According to the water treatment apparatus of the first aspect or the second aspect of the present disclosure, it is possible to suppress the wasteful consumption of the chemical by the backwashing.

It is a schematic diagram for demonstrating the normal use state of the water treatment apparatus of Embodiment 1. FIG. It is a schematic diagram for demonstrating the backwashing state of the water treatment apparatus of Embodiment 1. FIG. It is sectional drawing for demonstrating an example of the chemical | medical agent supply part of the water treatment apparatus of Embodiment 1. FIG. It is sectional drawing for demonstrating an example of the filtration part of the water treatment apparatus of Embodiment 1. FIG. It is a schematic diagram for demonstrating the water treatment apparatus of the 1st modification of Embodiment 1. FIG. It is a schematic diagram for demonstrating the water treatment apparatus of the 2nd modification of Embodiment 1. FIG. It is a schematic diagram for demonstrating the water treatment apparatus of Embodiment 2. FIG. It is a schematic diagram for demonstrating the water treatment apparatus of Embodiment 3. FIG.

Hereinafter, the water treatment apparatus according to the embodiment will be described with reference to the drawings. In the following plurality of embodiments, even if there are some differences in shapes on the drawings, the parts denoted by the same reference symbols exhibit the same functions unless otherwise specified. And

(Embodiment 1)
The water treatment apparatus 1000 of Embodiment 1 is demonstrated using FIG. 1 and FIG.

As shown in FIG. 1, the water treatment apparatus 1000 according to the present embodiment includes a raw water flow channel 10, a chemical supply unit 100, a chemical-treated water flow channel 20, a filtration unit 200, and a filtered water flow channel 40. . The water treatment apparatus 1000 includes a backwash water flow path 30, a first switching valve V1, a second switching valve V2, and a drainage on-off valve V3.

A pump P for pumping up well water is connected to the raw water flow path 10 as shown by a broken arrow in FIG. However, tap water or other types of water may be used instead of well water. When the pump P is driven, the raw water flow channel 10 guides raw water made of well water or the like to the medicine supply unit 100. As shown by the dashed arrows in FIG. 1, the medicine supply unit 100 is provided so as to receive raw water from the raw water flow path 10. The medicine supply unit 100 has a medicine supplied to the raw water therein. The medicine supply unit 100 is provided in a bypass channel connected in parallel to the raw water channel 10 in the branching unit 21 and the junction unit 22.

The drug supply unit 100 has a drug tank in which a drug can be put into the container part of the drug supply unit 100. The drug is mixed in the raw water rising from below in the drug supply unit 100. This will be described in detail later using FIG. The medicine-treated water supplied with the medicine flows out from the medicine supply unit 100 to the medicine-treated water flow path 20. The drug-treated water flow path 20 guides the drug-treated water supplied with the drug flowing out from the drug supply unit 100 to the filtration unit 200.

The drug is, for example, a chlorine-based drug that releases chlorine ions into raw water. Therefore, the drug has a bactericidal action. The drug may be anything such as a tablet holding a certain shape or a powder that does not have a certain shape. In addition, the drug may be made of a liquid or a viscous material.

1, the filtration unit 200 is provided so as to receive chemical-treated water flowing through the chemical-treated water flow path 20 as indicated by a broken-line arrow. The filtration unit 200 includes a filter medium that performs filtration processing on water that has been subjected to chemical treatment. In the present embodiment, the filter medium is gravel or sand particles. As indicated by the dashed arrows in FIG. 1, the filtered water flow path 40 guides filtered water that has flowed out of the filtering unit 200 to the outlet 60, for example, a faucet used by the user. The backwash water channel 30 is connected to the raw water channel 10 and the filtered water channel 40. The backwash water flow path 30 guides backflow wash water from the raw water flow path 10 to the filtered water flow path 40 as indicated by the dashed arrows in FIG.

The first switching valve V1 is provided at the connection between the raw water flow channel 10 and the backwash water flow channel 30. The first switching valve V1 is a so-called three-way valve. The first switching valve V1 is switched to either the first normal state or the first backflow cleaning state. The first switching valve V 1 in the first normal state guides raw water from the raw water flow path 10 to the medicine supply unit 100, as indicated by a dashed arrow in FIG. 1. The first switching valve V 1 in the first backflow cleaning state guides water for backflow cleaning from the raw water flow path 10 to the backflow cleaning water flow path 30, as indicated by a dashed arrow in FIG. 2.

The second switching valve V2 is provided at the connection between the filtered water flow path 40 and the backwash water flow path 30. The second switching valve V2 is a so-called three-way valve. The second switching valve V2 is switched to either the second normal state or the second backflow cleaning state. The second switching valve V2 in the second normal state guides the filtered water from the filtering unit 200 to the outlet 60 as indicated by the dashed arrow in FIG. The second switching valve V2 in the second backwashing state is used for backwashing from the backwashing water channel 30 to the filtration unit 200 via the filtered water channel 40, as indicated by a broken arrow in FIG. Guide the water.

The drainage on-off valve V3 is provided in the discharge channel 45 connected to the chemical-treated water channel 20. The drainage on-off valve V3 is switched between a closed state and an open state. The drainage on-off valve V3 in the closed state guides the chemical-treated water flowing through the chemical-treated water flow path 20 to the filtration unit 200, as indicated by the dashed arrows in FIG. The drain on-off valve V3 in the open state is configured to discharge the water for backflow cleaning that flows through the chemical-treated water flow path 20 from the discharge port 50 of the discharge flow path 45, as indicated by the dashed arrows in FIG. Lead.

According to the drug supply unit 100 of the present embodiment, the water for backflow cleaning does not pass through the drug supply unit 100. Therefore, wasteful consumption of the drug by backflow cleaning is suppressed.

In the present embodiment, when the water treatment apparatus 1000 is used, the first switching valve V1, the second switching valve V2, and the drain on / off valve V3 are each manually operated by the user. During normal use, the user manually switches the first switching valve V1 to the first normal state, switches the second switching valve V2 to the second normal state, and closes the drain on-off valve V3. Switch to. Thereby, the water at the time of normal use is the raw water flow path 10, the first switching valve V1, the chemical supply section 100, the chemical-treated water flow path 20, the filtration section 200, as shown by the dashed arrows in FIG. It flows through the filtered water channel 40 and the second switching valve V2 in this order. Thereby, the filtered water flows out from the tap as the outlet 60 used by the user. However, the water treatment apparatus 1000 may have a further water treatment unit that performs some further treatment on the filtered water downstream of the filtered water flow path 40.

On the other hand, at the time of backwashing, the user manually switches the first switching valve V1 to the first backwashing state, switches the second switching valve V2 to the second backwashing state, and opens / closes the drainage valve. V3 is switched to the open state. Thereby, the water for backflow cleaning is the raw water flow path 10, the first switching valve V1, the backflow cleaning water flow path 30, the second switching valve V2, the filtered water flow, as shown by the broken arrows in FIG. It flows through the channel 40, the filtration unit 200, the chemical-treated water flow path 20, and the drainage on-off valve V3 in this order. Thereafter, the water for backflow cleaning flows out from the discharge port 50 of the discharge channel 45. That is, the medicine for the medicine supply unit 100 is not supplied to the water for backflow cleaning. That is, no chemical is consumed during backwashing.

The switching operation or opening / closing operation of the first switching valve V1, the second switching valve V2, and the drainage opening / closing valve V3 is automatically performed by a control unit and a mechanism that receive a command signal from an operation unit operated by a user. May be executed.

In this case, the user can perform the backwashing by simply operating the operation unit, for example, by simply touching an icon on the touch panel without manually operating each valve. That is, the first switching valve V1, the second switching valve V2, and the drainage on-off valve V3 are collectively switched to either the normal state or the backflow cleaning state by the control unit. Therefore, the user's operation burden on the first switching valve V1, the second switching valve V2, and the drain on / off valve V3 is reduced.

As shown in FIG. 1, the water treatment apparatus 1000 according to the present embodiment has a main flow path constituting the raw water flow path 10 from the branching section 21 to the merge section 22, and the main flow path at the branch section 21 and the merge section 22. And a bypass flow path connected in parallel. The medicine supply unit 100 is provided in the bypass channel. In the bypass channel, the upstream part of the drug supply unit 100 constitutes a part of the raw water channel 10, and the downstream part of the drug supply unit 100 constitutes a part of the drug-treated water channel 20. To do.

The drainage on-off valve V3 is provided between the chemical-treated water flow path 20 where the main flow path and the bypass flow path merge, that is, between the branch portion 21 and the filtration portion 200. According to this, since the water for backflow cleaning does not flow into the raw water flow path 10, the water for backflow cleaning can be reliably prevented from flowing into the medicine supply unit 100.

It should be noted that the main flow path from the branching portion 21 to the merging portion 22 of the raw water flow passage 10 may be unnecessary if the amount of raw water flowing into the medicine supply portion 100 is adjusted.

Next, the internal structure of the medicine supply unit 100 according to the embodiment will be described with reference to FIG.

As can be seen from FIG. 3, the drug supply unit 100 according to the embodiment includes a drug tank 121, an introduction channel 111 A, a lead-out channel 111 C, and a drug container 140 in the container unit 112. In FIG. 3, the raw water in the medicine supply unit 100 and the water that has been subjected to the medicine treatment are integrally drawn as water W.

The chemical tank 121 has a cup-like shape and has a communication hole 121A on the bottom surface thereof. A dispersion material F made of a group of gravel having a thickness t is provided inside the chemical tank 121.

In normal use, the dispersion material F is gravel having dispersed gaps. Dispersant F has a gap that allows raw water to come into contact with medicine CA and that medicine-treated water supplied with medicine CA flows to communication hole 121A.

A mesh member 130 is provided between the dispersion material F and the bottom surface of the chemical tank 121. The mesh member 130 suppresses the passage of each particle constituting the dispersion material F, but has a size that allows raw water to pass through.

The medicine container 140 has a cylindrical shape and has a medicine CA therein. The drug CA may be a solid, liquid, or viscous material. The bottom of the medicine container 140 is constituted by a permeable membrane 142. However, when the drug CA is a solid or powdered drug, the drug CA may be placed directly on the dispersion material F.

The permeable membrane 142 transmits the raw water dispersed by the dispersion material F. The pore diameter of the permeable membrane 142 is a size that does not allow the drug CA supported by the permeable membrane 142 to permeate before the raw water passes through the permeable membrane 142 and contacts the drug CA. In addition, the pore size of the permeable membrane 142 is large enough to allow the substance constituting the drug CA contained in the drug-treated water to pass through after the raw water passes through the permeable membrane 142 and comes into contact with the drug CA. It is.

The introduction channel 111A is connected to the raw water channel 10 and receives the raw water. The introduction flow path 111 A is connected to the bottom surface portion from below the bottom surface portion of the medicine tank 121.

In the chemical tank 121, the raw water passes through the dispersion material F, then permeates the permeable membrane 142, and comes into contact with the chemical CA in the chemical container 140, so that it is treated with chemical. Thereafter, the drug-treated water containing the drug CA passes through the permeable membrane 142 and is mixed into the raw water existing in the gaps in which the dispersion material F is dispersed.

The chemical-treated water in the chemical tank 121 passes through the communication hole 121A and falls into the outlet channel 111C below the communication hole 121A. The outlet channel 111C guides the drug-treated water that has flowed down from the inside of the drug tank 121 through the communication hole 121A to the drug-treated water channel 20.

When the pump P is stopped or backwashing is performed, the raw water or the water for backwashing does not pass through the chemical supply unit 100. Therefore, the liquid level of the water W in the medicine tank 121 is lowered to the extent that it does not come into contact with the medicine CA. As a result, the drug CA is not consumed when the pump P is stopped or when backwashing is performed.

Next, the internal structure of the filtration unit 200 according to the embodiment will be described with reference to FIG.

As shown in FIG. 4, the filter unit 200 has a filter medium FL made of sand or gravel spread within the filter unit 200 to a certain height from the bottom of the tank. When the water treatment apparatus 1000 is in a normal use state, as shown by an arrow in FIG. 4, the chemical-treated water flows from the chemical-treated water flow path 20 into the filtration unit 200, and the filter medium FL is passed through the filtration unit 200. It falls from the top to the bottom to pass.

At this time, the scum S contained in the chemical-treated water in the filtration unit 200 adheres to the filter medium FL, thereby being removed from the chemical-treated water in the filtration unit 200. Thereafter, the filtered water from which the scum S has been removed flows into the filtered water flow path 40.

During backflow cleaning, the water for backflow cleaning that has flowed from the filtered water flow path 40 into the filtration unit 200 flows in the direction opposite to the direction indicated by the arrow in FIG. Therefore, the dirty water for backflow cleaning including the scum S adhering to the filter medium FL flows toward the chemical-treated water flow path 20 and is discharged from the discharge port 50 (see FIG. 2) of the discharge flow path 45. .

In the present embodiment, the filtration unit 200 has a structure as shown in FIG. 4, but any filter may be used as long as it can be backwashed.

A water treatment apparatus 1000 according to a first modification of the first embodiment will be described with reference to FIG.

As shown in FIG. 5, in the water treatment apparatus 1000 of the first modification, a pressure regulating valve that adjusts the pressure of raw water in the main flow path between the branching portion 21 and the merging portion 22 of the raw water flow passage 10. PV is provided. Further, a flow rate adjustment valve FV is provided in the raw water flow channel 10 upstream of the drug supply unit 100 in the bypass flow channel between the branching unit 21 and the merging unit 22. Even in the water treatment apparatus 1000 of the first modification as described above, the same effect as that obtained by the water treatment apparatus 1000 of the present embodiment described above can be obtained.

A water treatment apparatus 1000 according to a second modification of the first embodiment will be described with reference to FIG.

The water treatment apparatus 1000 of the second modification of the first embodiment has a structure that is substantially the same as the water treatment apparatus 1000 of the first modification. As shown in FIG. 6, the water treatment apparatus 1000 according to the second modified example is provided with two bypass channels in parallel with the main channel between the branching unit 21 and the junction 22. Two drug supply units 100 are provided in each of the two bypass channels. The two drugs present in the two drug supply units 100 may be of the same type, but may be of different types. The upstream side of the drug supply unit 100 of the two bypass channels is the raw water channel 10. Downstream of the drug supply unit 100 of the two bypass channels is a drug-treated water channel 20.

Moreover, the flow rate adjustment valve FV is provided in the raw | natural water flow path 10 of the upstream of each chemical | medical agent supply part 100 of two bypass flow paths. A pressure control valve PV is provided in the main flow path between the branching section 21 and the merging section 22 of the raw water flow path 10. Even in the water treatment apparatus 1000 of the second modified example, the same effect as that obtained by the water treatment apparatus 1000 of the above-described embodiment can be obtained. Note that three or more bypass channels provided with the medicine supply unit 100 may be provided.

As long as the filtration unit 200 can be cleaned using the water for backflow cleaning supplied with the drug by the drug supply unit 100, an additional valve or the like is provided in at least one of the flow paths of the present embodiment. May be provided.

(Embodiment 2)
The water treatment apparatus 1000 of the present embodiment is almost the same as the water treatment apparatus 1000 of the first embodiment. Hereinafter, the point which the water treatment apparatus 1000 of this Embodiment differs from the water treatment apparatus 1000 of Embodiment 1 is mainly demonstrated.

The water treatment apparatus 1000 according to the second embodiment will be described with reference to FIG.

As shown in FIG. 7, in the water treatment apparatus 1000 according to the second embodiment, the drainage on-off valve V3 is connected to the drug-treated water flow path 20 as a bypass flow path on the downstream side of the drug supply unit 100. It is provided in the discharge channel 45. That is, the drainage on-off valve V3 is provided in the discharge channel 45 connected to the drug-treated water channel 20 between the drug supply unit 100 and the merging unit 22. Also with the water treatment apparatus 1000 of the present embodiment, it is possible to prevent the backflow water from flowing into the chemical supply unit 100.

In this case, it may be preferable that a one-way valve is provided in the main flow path between the branch part 21 and the merge part 22 of the raw water flow path 10. In this case, the one-way valve allows the raw water to flow through the main flow path as the raw water flow path 10 from the branching portion 21 to the merging portion 22 in a normal use state. On the other hand, the one-way valve in this case prevents the water for backflow cleaning from flowing into the medicine supply unit 100 from the filtration unit 200 via the junction unit 22 and the branch unit 21 in the backflow cleaning state.

However, depending on the relationship between the height positions of the drug supply unit 100 and the drainage on-off valve V3, the water pressure of the raw water remaining in the raw water flow path 10 from the branching unit 21 to the drug supply unit 100 may be It becomes resistance. In this case, the resistance due to the water pressure of the raw water remaining in the raw water flow path 10 suppresses the backwash water from flowing from the merging section 22 to the medicine supply section 100 via the branch section 21. Therefore, the aforementioned one-way valve provided in the main flow path between the branch portion 21 and the merge portion 22 is not an essential configuration.

Considering the above, the discharge channel 45 having the drain on-off valve V3 is provided in the water treatment device 1000 of the second modification of the first embodiment shown in FIG. You may be connected to the confluence | merging part of two downstream bypass flow paths. Further, the discharge flow path 45 having the drain opening / closing valve V3 includes two downstream channels of the two chemical supply units 100 in the water treatment apparatus 1000 of the second modification of the first embodiment shown in FIG. You may provide in each of the bypass flow paths.

(Embodiment 3)
The water treatment apparatus 1000 of the present embodiment is almost the same as the water treatment apparatus 1000 of the first or second embodiment. Hereinafter, the point which the water treatment apparatus 1000 of this Embodiment differs from the water treatment apparatus 1000 of Embodiment 1 or 2 is mainly demonstrated.

The water treatment apparatus 1000 of Embodiment 3 is demonstrated using FIG.

The water treatment apparatus 1000 according to the present embodiment includes a back-flow cleaning on-off valve V4 instead of the second switching valve V2 of the water treatment apparatus 1000 according to the first embodiment. The backflow cleaning on-off valve V4 is provided in the filtered water flow path 40 on the downstream side of the filtered water from the connection portion between the filtered water flow path 40 and the backflow cleaning water flow path 30. The backflow cleaning on-off valve V4 is switched to either the normal open state or the backflow cleaning closed state. The normally opened back-flow cleaning on-off valve V4 guides filtered water from the filtering unit 200 to the outlet 60 via the filtered water flow path 40. The backflow cleaning on-off valve V4 in the backflow cleaning closed state guides backflow cleaning water from the backflow cleaning water channel 30 to the filtration unit 200 via the filtered water channel 40. Even with this configuration, the backwash water does not pass through the medicine supply unit 100. Therefore, wasteful consumption of the drug by backflow cleaning is suppressed.

In the present embodiment, when the water treatment apparatus 1000 is used, the switching valve V1 (same as the first switching valve V1 in the first embodiment), the backflow cleaning on-off valve V4, and the drainage on-off valve V3 are provided by the user. Manually operated by. During normal use, the user manually switches the switching valve V1 to the normal state, switches the backwashing on / off valve V4 to the normal open state, and switches the drainage on / off valve V3 to the normal closed state. On the other hand, at the time of backwashing, the user manually switches the switching valve V1 to the backwashing state, switches the backwashing on / off valve V4 to the backwashing closed state, and opens the drainage on / off valve V3 to the backwashing open state. Switch to.

Note that the switching operation or switching operation of the switching valve V1, the backwashing on-off valve V4, and the drainage on-off valve V3 is automatically executed by a control unit and a mechanism that receive a command signal from the operation unit operated by the user. May be. In this case, the user can execute the backwash without operating each valve manually only by operating the operation unit. That is, the switching valve V1, the backflow cleaning on-off valve V4, and the drainage on-off valve V3 are collectively switched to either the normal state or the backflow cleaning state by the control unit. Therefore, the user's operation burden on the switching valve V1, the backwashing on / off valve V4, and the drain on / off valve V3 is reduced.

The backwashing on / off valve V4 of the present embodiment is different from the backwashing on / off valve V4 in the water treatment of the first modification (see FIG. 5) and the second modification (see FIG. 6) of the first embodiment. It may be used instead of the second switching valve V2 of the device 1000. Moreover, the on-off valve V4 for backflow cleaning of the present embodiment may be used instead of the second switching valve V2 of the water treatment apparatus 1000 (see FIG. 7) of the second embodiment.

(Other embodiments)
The water treatment apparatus 1000 adds the components of the respective embodiments described above, and other water treatment is performed on at least one of the raw water flow path 10, the drug-treated water flow path 20, and the filtered water flow path 40. It may further include at least one of a section and a valve. In the water treatment apparatus 1000, the medicine-treated water supplied with the medicine from the medicine supply unit 100 during normal use passes through the filtration unit 200, and the backwash water does not pass through the medicine supply unit 100 during backwashing. Any material can be used as long as it passes through the filtration unit 200.

Hereinafter, a characteristic configuration of the water treatment apparatus 1000 according to the embodiment and effects obtained thereby will be described.

(1) The water treatment apparatus 1000 of the embodiment includes a raw water flow channel 10, a chemical supply unit 100, a chemical-treated water flow channel 20, a filtration unit 200, a filtered water flow channel 40, a backwash water flow channel 30, and a first switching. A valve V1, a second switching valve V2, and a drain on-off valve V3 are provided.

The raw water channel 10 guides raw water. The medicine supply unit 100 is provided so as to receive raw water from the raw water flow path 10 and supplies the medicine to the raw water. The drug-treated water flow path 20 guides the drug-treated water supplied with the drug CA flowing out from the drug supply unit 100. The filtration unit 200 is provided so as to receive chemical-treated water flowing through the chemical-treated water flow path 20, and has a filter medium FL that performs filtration on the chemical-treated water. The filtered water channel 40 guides filtered water that has flowed out of the filtering unit 200 and has been subjected to the filtering process. The backwash water flow path 30 is connected to the raw water flow path 10 and the filtered water flow path 40, and guides backwash water from the raw water flow path 10 to the filtered water flow path 40.

The first switching valve V1 is provided at the connection between the raw water flow channel 10 and the backwash water flow channel 30. The first switching valve V1 is switched to either the first normal state or the first backflow cleaning state. The first switching valve V 1 in the first normal state guides raw water from the raw water flow path 10 to the medicine supply unit 100. The first switching valve V 1 in the first backflow cleaning state guides water for backflow cleaning from the raw water flow channel 10 to the backflow cleaning water flow channel 30.

The second switching valve V2 is provided at the connection between the filtered water flow path 40 and the backwash water flow path 30. The second switching valve V2 is switched to either the second normal state or the second backflow cleaning state. The second switching valve V2 in the second normal state guides filtered water from the filtration unit 200 to the outlet 60. The second switching valve V 2 in the second backflow cleaning state guides backflow cleaning water from the backflow cleaning water channel 30 to the filtration unit 200 via the filtered water channel 40.

The drainage on-off valve V3 is provided in the discharge channel 45 connected to the chemical-treated water channel 20. The drainage on-off valve V3 is switched between a closed state and an open state. The drainage on-off valve V3 in the closed state guides the chemical-treated water flowing through the chemical-treated water flow path 20 to the filtration unit 200. The drainage on-off valve V3 in the open state guides the water for backflow cleaning flowing through the chemical-treated water flow path 20 to the discharge port 50 of the discharge flow path 45.

According to the above configuration, the water for backflow cleaning does not pass through the drug supply unit 100. Therefore, wasteful consumption of the drug by backflow cleaning is suppressed.

(2) The water treatment apparatus 1000 according to another embodiment includes a backwashing on-off valve V4 instead of the second switching valve V2 according to the first embodiment. The backflow cleaning on-off valve V4 is provided in the filtered water flow path 40 on the downstream side of the filtered water from the connection portion between the filtered water flow path 40 and the backflow cleaning water flow path 30. The backflow cleaning on-off valve V4 is switched to either the normal open state or the backflow cleaning closed state. The normally opened back-flow cleaning on-off valve V4 guides filtered water from the filtering unit 200 to the outlet 60 via the filtered water flow path 40. The backflow cleaning on-off valve V4 in the backflow cleaning closed state guides backflow cleaning water from the backflow cleaning water channel 30 to the filtration unit 200 via the filtered water channel 40. Even with this configuration, the backwash water does not pass through the medicine supply unit 100. Therefore, wasteful consumption of the drug by backflow cleaning is suppressed.

(3) The drug supply unit 100 has a drug tank 121 into which a drug can be put. The medicine supply unit 100 introduces the filtered water from the filtered water passage 40 to the medicine CA in the medicine tank 121 and the medicine-treated water flow containing the medicine CA from the medicine tank 121. And a lead-out flow path 111 C leading to the path 20. According to this, it is possible to prevent wasteful consumption of the medicine CA due to the backwash water flowing into the medicine supply unit 100 during backwashing.

This application claims priority based on Japanese Patent Application No. 2018-021903, filed on Feb. 9, 2018, and incorporates all the descriptions in the Japanese application by reference. .

DESCRIPTION OF SYMBOLS 10 Raw water flow path 20 Chemical-processed water flow path 30 Backflow washing water flow path 40 Filtered water flow path 45 Discharge flow path 50 Discharge port 60 Outflow port 100 Drug supply part 111A Introduction flow path 111C Derivation flow path 121 Drug tank 200 Filtration part 1000 Water treatment device CA Chemical FL Filter medium V1 First switching valve (switching valve)
V2 Second switching valve V3 Drain open / close valve V4 Backflow open / close valve

Claims

A raw water channel for guiding the raw water,
A chemical supply section that is provided to receive the raw water from the raw water flow path, and supplies a chemical to the raw water;
A medicine-treated water flow path for guiding medicine-treated water supplied with the medicine flowing out from the medicine supply section;
A filtration unit that is provided to receive the drug-treated water flowing through the drug-treated water flow path, and has a filter medium that performs filtration treatment on the drug-treated water;
A filtered water flow path for guiding filtered water that has flowed out of the filtration unit and has undergone the filtration treatment;
A backwash water channel connected to the raw water channel and the filtered water channel and leading water for backwashing from the raw water channel to the filtered water channel;
A first normal state that is provided at a connection portion between the raw water flow channel and the backwash water flow channel and guides the raw water from the raw water flow channel to the drug supply unit, and the backwash water flow channel from the raw water flow channel A first switching valve that is switched to one of the first backwash states that guide the backwash water to
A second normal state that is provided at a connection portion between the filtered water flow path and the backwash water flow path and guides the filtered water from the filtration section to an outlet, and the filtered water flow from the backwash water flow path. A second switching valve that is switched to one of the second backflow cleaning states for guiding the water for backflow cleaning to the filtration unit via a water flow path;
A closed state that is provided in a discharge channel connected to the drug-treated water channel and guides the drug-treated water flowing through the drug-treated water channel to the filtration unit; and the drug-treated water channel A water treatment apparatus comprising: a drainage on-off valve that is switched to any one of an open state that guides the flowing backwash water to the discharge port of the discharge channel.
A raw water channel for guiding the raw water,
A chemical supply unit that is provided so that the raw water flows from the raw water flow path, and supplies a chemical to the raw water;
A medicine-treated water flow path for guiding medicine-treated water supplied with the medicine flowing out from the medicine supply section;
A filtration unit that is provided to receive the drug-treated water flowing through the drug-treated water flow path, and has a filter medium that performs filtration treatment on the drug-treated water;
A filtered water flow path for guiding filtered water that has flowed out of the filtration unit and has undergone the filtration treatment;
A backwash water channel connected to the raw water channel and the filtered water channel and leading water for backwashing from the raw water channel to the filtered water channel;
A normal state in which the raw water is provided from the raw water flow path to the drug supply unit, and the reverse flow from the raw water flow path to the backwash water flow path, provided at a connection portion between the raw water flow path and the backflow wash water flow path; A switching valve that can be switched to one of the back-flow cleaning states that guide the cleaning water;
Provided in the filtered water channel downstream of the filtered water channel from the connection between the filtered water channel and the backwash water channel, and the outlet from the filtered unit via the filtered water channel One of a normal open state for guiding the filtered water and a closed back flow cleaning state for guiding the water for backwashing from the backwash water flow channel to the filtration unit via the filtered water flow channel. An on-off valve for backflow cleaning that can be switched to
A closed state for normal use, which is provided in a discharge channel connected to the drug-treated water channel and guides the drug-treated water flowing through the drug-treated water channel to the filtration unit; and the drug-treated water stream A water treatment apparatus comprising: a drainage on-off valve that can be switched to any one of an open state for backflow cleaning that guides the backflow cleaning water flowing through a channel to a discharge port of the discharge channel.
The medicine supply unit
A medicine tank into which the medicine can be charged;
An introduction channel for guiding the filtered water from the filtered water channel to the drug in the drug tank;
The water treatment apparatus according to claim 1, further comprising: a discharge channel that guides the drug-treated water containing the drug from the drug tank to the drug-treated water channel.