Drainage recovery device

Abstract

A wastewater recovery device includes a water treatment system and a chemical supply unit. The water treatment system has a coagulation section, a turbidity removal section, and a reverse osmosis membrane treatment section. The coagulation section includes a coagulation tank for introducing water to be treated. The turbidity removal section filters the treated water treated by the coagulation section. The reverse osmosis membrane treatment section desalinates the treated water treated by the turbidity removal section. The chemical supply unit has two or more chemical tanks for supplying chemical solutions to the water treatment system. The water treatment system is housed in containers A and B, and the chemical supply unit is housed in container C. Chemical solutions are supplied to the water treatment system from the chemical supply unit via piping.

Description

Technical Field

[0001] This invention relates to a wastewater recovery device, and more particularly to a wastewater recovery device comprising a condensation section, a turbidity removal membrane section, a reverse osmosis membrane treatment section, and a chemical supply section. Background Technology

[0002] Patent Document 1 describes a wastewater recovery device that includes a coagulation section, a turbidity removal membrane section, a reverse osmosis membrane treatment section, and a chemical supply section. In Patent Document 1, the water to be treated is treated by adding inorganic and organic coagulants in a coagulation tank. The coagulated water is then treated by ultrafiltration (UF) membrane device for turbidity removal, and subsequently by reverse osmosis (RO) membrane device to become treated water.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-186760. Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] Previously, wastewater recovery systems were designed for each site based on the characteristics and volume of the water to be treated. The various components of the wastewater recovery system were transported to the site and connected via piping. Therefore, on-site installation was time-consuming and labor-intensive, resulting in longer construction periods and potentially higher costs.

[0008] The objective of this invention is to provide a drainage recycling device that facilitates the handling of materials in and out of construction sites and facilitates on-site construction operations.

[0009] Methods for solving problems

[0010] The wastewater recycling device of the present invention is described below.

[0011] [1] A wastewater recovery device, wherein the wastewater recovery device comprises a water treatment system and a chemical supply unit. The water treatment system includes a coagulation section, a turbidity removal section, and a reverse osmosis membrane treatment section. The condensation section includes a condensation tank for introducing the water to be treated. The turbidity removal unit filters the treated water that has been treated by the condensation unit. The reverse osmosis membrane treatment unit desalinates the treated water that has been treated by the turbidity removal treatment unit. The medicine supply unit has two or more medicine tanks for supplying medicine to the water treatment system. The water treatment system is housed in one or more containers (A, B), and the drug supply unit is housed in another container (C). The medicine solution is supplied to the water treatment system from the medicine solution supply unit through piping.

[0012] [2] The drainage recycling device as described in [1] is provided with openings for pipe insertion on the side of the container (C) and the side of the container (B) opposite to the side of the container (C), and the pipe is inserted through the openings.

[0013] [3] The wastewater recycling device as described in [1], wherein the water treatment system has a container (B) that houses the condensation section and a container (A) that houses the turbidity removal membrane treatment section and the reverse osmosis membrane treatment section.

[0014] [4] The drainage recovery device as described in [3] is provided in the container (B) with a pump for conveying liquid to the turbidity removal membrane treatment unit and a pump for conveying liquid to the reverse osmosis membrane treatment unit.

[0015] [5] The drainage recovery device as described in [1], wherein the liquid tank is detachably disposed in the container (C).

[0016] [6] The drainage recovery device as described in [4] includes a backwash water tank provided in the container (A) for storing backwash water supplied to the turbidity removal membrane treatment unit.

[0017] [7] The drainage recovery device as described in [6] is provided with a backwash pump in the container (B), which is used to transport backwash water in the backwash water tank to the turbidity removal membrane treatment unit.

[0018] [8] The drainage recycling device as described in [3], wherein a first coagulation tank for coagulating raw water is provided outside the container (B) and close to the container (B), and the piping for guiding the liquid from the liquid tank in the container (C) to the coagulation tank is configured to pass through the interior of the container (B).

[0019] [9] The drainage recycling device as described in any one of [1] to [8], wherein each container (A, B, C) is a rectangular box that is longer in one direction and is arranged side by side in such a way that the directions of each long side are parallel.

[0020] [The effects of the invention]

[0021] According to the present invention, since each piece of equipment is housed within a container, a wastewater recycling system can be constructed by moving the container containing the equipment to the site and connecting the specified pieces of equipment to each other via piping. Therefore, the moving operation and the construction of the wastewater recycling system on site are simplified, the construction period is shortened, and various costs are reduced.

[0022] The wastewater recycling device of the present invention allows for easy removal / removal of the piping and container from the site when not in use. Furthermore, the removed container can be moved to other sites for reuse. Attached Figure Description

[0023] Figure 1 This is a perspective view of the wastewater recycling device after it was first moved into the site.

[0024] Figure 2 This is a top view of the wastewater recycling device according to the embodiment.

[0025] Figure 3 This is a left-side view of container A.

[0026] Figure 4 This is the right-side view of container A.

[0027] Figure 5 This is a flow chart of the wastewater recycling device.

[0028] Figure 6A This is a diagram illustrating the piping configuration.

[0029] Figure 6B This is a diagram illustrating the piping configuration.

[0030] Figure 7 This is a structural diagram of the sidewalls of containers B and C.

[0031] Figure 8 This is a perspective view of the drainage recycling device after it was first moved into the site according to another embodiment. Detailed Implementation

[0032] The following is for reference Figures 1 to 8 The wastewater recovery device of the embodiment will be described.

[0033] like Figure 1 As shown, the drainage recycling device 1 has three containers A, B, and C, as well as a first condensation tank 1.

[0034] Containers A, B, and C are rectangular boxes (cubic prism-shaped boxes) that are longer in one direction, arranged so that the long sides are parallel. In this embodiment, container B is positioned between containers A and C.

[0035] Containers A, B, and C each have a pair of long sidewalls, a top surface, a bottom surface, and a pair of end faces. A door capable of being opened / closed is provided on one or both of these end faces.

[0036] A plurality of liquid medicine tanks 2 are arranged inside container C for storing liquid medicine. Each liquid medicine tank 2 is detachably installed in container C by bolts or the like, and the number of tanks can be changed.

[0037] In the described embodiment, the medicine container 2 is, for example... Figure 5 As shown, the facility includes tanks for NaClO, H2SO4, slime control agent (anti-sticking agent), NaOH, FeCl3 (as an inorganic coagulant), NaHSO3 (as a reducing agent), coagulation aid, organic coagulant (organic polymeric coagulant), scale dispersant, and membrane cleaning agent. Furthermore, tanks for other chemicals may also be provided.

[0038] like Figure 6A , Figure 6B As shown, each tank 2 is equipped with a liquid injection pump 5, and the liquid injected from the pump 5 can be supplied to each device through piping (in this embodiment, the pipe 3 is made of perfluoroalkoxy (PFA)).

[0039] When the liquid medicine ejected from pump 5 is supplied to only one device, one end of a pipe 3 is connected to the outlet of pump 5, and the other end of the pipe 3 extends to the device to which the liquid medicine is injected. When the liquid medicine is supplied to two or more devices, such as... Figure 6A Similar to the tanks for NaClO, NaOH, and H2SO4, the piping on the pump outlet side is branched into two or more pipes 3, and a valve 4 is installed on each pipe 3.

[0040] like Figure 7 Thus, on the side wall of container C on the side of container B and on the side wall of container B on the side of container C, three openings 6 and three openings 7 for the insertion of pipe 3 are respectively provided.

[0041] exist Figure 7 The leftmost openings 6 and 7 are connected to the pipe 3 facing the first coagulation tank 1. Figure 7 The rightmost openings 6 and 7 are connected to the pipe 3 extending to container A. The central openings 6 and 7 are connected to the pipe 3 that connects to the second condensation tank 12 and the third tank 13 inside container B.

[0042] Furthermore, a synthetic resin pipe 8 is installed between openings 6 and 7. Each pipe 3 is inserted into the pipe 8.

[0043] like Figure 5As shown, the first coagulation tank 1 receives raw water from the raw water pipe 1a and can add NaClO (bactericide), coagulation aid, NaOH, H2SO4, and FeCl3 (coagulant) through each pipe 3. A measuring mechanism is installed in the raw water pipe 1a to measure the flow rate, conductivity, and turbidity of the raw water. When the conductivity or turbidity of the raw water is below a set value, the raw water is transferred to the drainage pipe 41 via the bypass line 1b.

[0044] The pipe 3 for injecting the medicine into the first coagulation tank 1 is introduced into the container B through openings 6 and 7, and through opening 10 on one end face of the container B. Figure 1 It is drawn out of container B and connected to the first condensation tank 1.

[0045] In the first coagulation tank 1, an inorganic coagulant is injected, and coagulated flocs are formed through the neutralization reaction of suspended solids (SS) in the raw water or the adsorption reaction (co-precipitation reaction) on the surface of ferric hydroxide. In addition, NaClO (sodium hypochlorite) is injected as needed.

[0046] like Figure 2 , Figure 5 As shown, a second coagulation tank 12 and a third tank 13 are connected inside container B. The coagulated liquid from the first coagulation tank 1 flows into the second coagulation tank 12 through the transfer pipe 11, and the coagulated liquid in the second coagulation tank 12 flows into the third tank 13 through the transfer pipe 14.

[0047] A pH meter is installed in the second coagulation tank 12, allowing the addition of coagulation aids, organic coagulants, and NaOH for pH adjustment via various pipes 3. The third tank 13 serves as a relay tank for supplying coagulated water to the ultrafiltration (UF) unit. Raw water reception / stopping is controlled based on the water level in the third tank 13. Furthermore, an oxidation-reduction potentiometer (ORP) is installed in the third tank 13, and the injection of NaClO (sodium hypochlorite) is controlled in conjunction with the ORP value.

[0048] The container B is equipped with: a pump 16 for transporting the condensate in the third tank 13 to the UF device (ultrafiltration membrane device) 21 in the container A; a backwash pump 17 for backwashing the UF device 21; and a high-pressure pump 18 for pressurizing the RO water supply.

[0049] The container A is equipped with an RO device (reverse osmosis membrane device) 25, a UF device 21, a backwash water tank 32 for storing backwash water from the UF device 21, a drain tank 40, etc.

[0050] The condensate from the third tank 13 is transported to the UF unit 21 via pump 16 and piping 20. The permeate water after passing through the UF membrane is supplied to the RO unit 25 via piping 22, pump 18, and piping 23. Furthermore, a portion of the UF permeate water can be introduced into the backwash water tank 32 via piping 26 branching from piping 22 and on / off valve 27.

[0051] like Figure 3 As shown, a plurality of UF devices (UF membrane modules) 21 are arranged side by side, configured such that while membrane filtration of condensate is performed in one module, backwashing is performed in the other modules, and the module is set to standby state.

[0052] The concentrated water from the UF unit 21 flows into the drain tank 40 via pipe 39 and is discharged via pipe 41.

[0053] The permeate water from the RO unit 26 is taken out as treated water via pipe 28. Furthermore, a portion of the RO permeate water can be introduced into the backwash water tank 32 via pipe 29 branching from pipe 28 and on / off valve 30.

[0054] The concentrated water from the RO unit 25 is discharged through pipes 42 and 41.

[0055] The RO unit (RO membrane module) 25 is also like... Figure 2 The diagram shows multiple units arranged side by side. During the membrane separation process of some modules, other modules are cleaned or replaced.

[0056] During backwashing of the UF device 21, water in the backwash water tank 32 is supplied to the secondary side (through water chamber) of the UF device 21 via pipe 34, pump 17, and pipe 35. Backwash drainage through the UF membrane to the primary side is discharged to the drain tank 40 via pipe 39. In addition, chemical cleaning is performed approximately once a day.

[0057] In order to add scale dispersant, slime control agent, NaHSO3 (reducing agent), and H2SO4 for pH adjustment to the RO water supply, each pipe 3 connected to the tank 2 of these solutions in container C is introduced from container C into container B through openings 6 and 7, and then through container B into container A, with each end connected to piping 22.

[0058] During the cleaning of the pharmaceuticals in the UF device 21, the membrane cleaning agent solution in the membrane cleaning agent tank in container C is added to the piping 34 via pipe 3. The membrane cleaning agent pipe 3 is also introduced from container C into container B through openings 6 and 7, and then through container B into container A, with its end connected to piping 34.

[0059] Furthermore, although the illustration is omitted, openings are also provided on the opposite sides of containers A and B in the same way as openings 6 and 7, and pipes 20, 22, 23, 34, and 35 are disposed between containers A and B through these openings.

[0060] [Construction Method of Wastewater Recycling Device]

[0061] Next, the construction method of the drainage recycling device will be described.

[0062] In the manufacturing plant of the wastewater recycling system, various equipment are assembled into the boxes that constitute containers A, B, and C. In container A, UF unit 21, RO unit 25, backwash water tank 32, and wastewater tank 40 are installed and connected to each other through piping.

[0063] In container B, a second coagulation tank 12, a third tank 13, and pumps 16 to 18 are installed, and tanks 12 and 13 are connected by piping 14. A stirrer or pH meter, or other instruments, is pre-installed in the second coagulation tank 12. An ORP meter, etc., is also pre-installed in the third tank 13.

[0064] In container C, each tank 2 and each pump 5 are installed, and one end of each pipe 3 of the required length is connected to the discharge side of each pump 5. The other end of each pipe 3 is configured to face the opening 6.

[0065] In addition, a first coagulation tank 1 is constructed. An agitator or pH meter, or other similar equipment, is pre-installed in the first coagulation tank 1.

[0066] Regarding pipes 20, 22, 23, 34, and 35, one end of these is connected to the connected device, pump, or tank, and is pre-installed inside container A or container B. The other end of the pipes is configured with an opening facing the side of container A or container B.

[0067] Furthermore, a control panel is installed in any container, such as container B, and one end of the wiring harness for the controlled equipment or instrument is pre-connected to the control panel. For the wiring harnesses for pumps 16 to 18 or instruments inside container B, the other end is pre-connected to them. The other end of other wiring harnesses is pre-positioned near an opening on the side (or end) of the container.

[0068] Containers A through C and the first condensation tank 1 were transported to the site by trucks and other means, and set up as follows: Figure 1The arrangement is as follows. Then, the first coagulation tank 1 and the second coagulation tank 12 are connected via piping 11, and the other end of the corresponding drug injection pipe 3 is connected to each tank 1, 12, 13, piping 22, 34. Furthermore, the other ends of piping 20, piping 22, piping 23, piping 34, and piping 35 are connected to the designated pump or tank. Finally, the other end of each wiring harness is connected to the controlled equipment or instrument.

[0069] Thus, the installation of the wastewater recycling device is complete.

[0070] The wastewater recovery device is easy to move to the site and assemble on-site. Furthermore, when the wastewater recovery device is not needed, dismantling is also easy because the piping or wiring between containers can be removed, and containers A to C and the first condensation tank 1 can be moved out separately.

[0071] The above-described embodiment is an example of the present invention, and the present invention may also be configured in forms other than those described above. For example, treatment tanks or water treatment equipment other than those described above may also be used. Furthermore, chemical solutions other than those described above may also be used. Moreover, when multiple series of containers A, B, and C are provided, the units A, B, and C may be arranged side-by-side, or as follows... Figure 8 The diagram shows that the containers are overlapped more than two sections longitudinally. Furthermore, in... Figure 8 In the middle, the first coagulation tank 1 on the upper side is set on the platform.

[0072] Although the present invention has been described in detail using specific methods, those skilled in the art will understand that various modifications can be made without departing from the intent and scope of the present invention.

[0073] This application is based on Japanese Patent Application No. 2024-045198, filed on March 21, 2024, and incorporates the entire contents thereof by reference.

[0074] Explanation of reference numerals in the attached figures

[0075] A, B, C: Containers.

[0076] 1: First coagulation tank.

[0077] 2: Medicine liquid container.

[0078] 3: Piping (pipes) for injecting medicine.

[0079] 5. 16~18: Pump.

[0080] 12: Second condensation tank.

[0081] 13: The third slot.

[0082] 21: Ultrafiltration membrane device.

[0083] 25: Reverse osmosis membrane device.

[0084] 32: Backwash tank.

[0085] 40: Drainage tank.

Claims

1. A wastewater recycling device, wherein, The wastewater recovery device is a wastewater recovery device that includes a water treatment system and a chemical supply unit. The water treatment system includes a coagulation section, a turbidity removal section, and a reverse osmosis membrane treatment section. The coagulation section includes a coagulation tank for introducing the water to be treated. The turbidity removal section filters the treated water processed by the coagulation section. The reverse osmosis membrane treatment section desalinates the treated water processed by the turbidity removal section. The medicine supply unit has two or more medicine tanks for supplying medicine to the water treatment system. The water treatment system is housed in one or more containers (A, B), and the drug supply unit is housed in another container (C). The medicine solution is supplied to the water treatment system from the medicine solution supply unit through piping.

2. The wastewater recycling device as described in claim 1, wherein, A pipe fitting opening is provided on the side of the container (C) and on the side of the container (B) opposite to the side of the container (C). The piping is inserted through the opening.

3. The wastewater recycling device as described in claim 1, wherein, The water treatment system has a container (B) that houses the condensation section and a container (A) that houses the turbidity removal membrane treatment section and the reverse osmosis membrane treatment section.

4. The wastewater recycling device as described in claim 3, wherein, The container (B) is equipped with a pump for supplying liquid to the turbidity removal membrane treatment unit and a pump for supplying liquid to the reverse osmosis membrane treatment unit.

5. The wastewater recycling device as described in claim 1, wherein, The liquid medicine tank is detachably mounted on the container (C).

6. The wastewater recycling device as described in claim 4, wherein, A backwash water tank is provided inside the container (A), which stores backwash water supplied to the turbidity removal membrane treatment unit.

7. The wastewater recycling device as described in claim 6, wherein, A backwash pump is provided inside the container (B), which is used to transport backwash water in the backwash water tank to the turbidity removal membrane treatment unit.

8. The wastewater recycling device as described in claim 3, wherein, Outside of container (B), near container (B), a first coagulation tank for coagulating raw water is disposed. The piping for guiding the liquid medicine from the liquid medicine tank in the container (C) to the coagulation tank is configured to pass through the interior of the container (B).

9. The wastewater recovery device as described in any one of claims 1 to 8, wherein, Each container (A, B, C) is a rectangular box that is longer in one direction, and they are arranged side by side so that the directions of each long side are parallel.

Images