Wastewater treatment device based on reverse osmosis membrane

Abstract

The utility model discloses a wastewater treatment device based on a reverse osmosis membrane, which relates to the technical field of wastewater treatment and particularly comprises a reverse osmosis membrane component, a high-pressure pump, a cleaning pump, a concentrated water extraction pump and a pure water extraction pump. The structure of the used reverse osmosis membrane pipe is the same as that of the compensation reverse osmosis membrane pipe, an inlet main pipeline and a first branch pipe are arranged at one end of the used reverse osmosis membrane pipe, and the first branch pipe, a second branch pipe and a third branch pipe are fixed at the top end of the inlet main pipeline. According to the wastewater treatment device based on the reverse osmosis membrane, through the arrangement of the reverse osmosis membrane assembly, reverse osmosis membrane pipes in the reverse osmosis membrane assembly can be sequentially cleaned, and the use of the wastewater treatment device is not influenced in the cleaning process of the reverse osmosis membrane pipes, so that the working efficiency of the wastewater treatment device is improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically a wastewater treatment device based on a reverse osmosis membrane. Background Technology

[0002] Reverse osmosis is generally used as a terminal treatment for industrial wastewater. It has a high rejection rate for inorganic salts, organic matter, heavy metal ions, etc. in the water, produces excellent effluent, saves production costs, and reduces the amount of wastewater discharged. A search revealed several wastewater treatment devices based on reverse osmosis membranes in the prior art, such as the one disclosed in patent application number CN202122387445.8 and the one disclosed in patent application number CN202321258208.4. In these solutions, wastewater enters from one end of the reverse osmosis membrane module, while purified water and concentrate are discharged from the other end. However, during use, colloids, microorganisms, impurities, and sparingly soluble salts inevitably precipitate on the surface of the reverse osmosis membrane module. Therefore, the reverse osmosis membrane module needs to be cleaned after a period of use. When the reverse osmosis membrane module in the above solutions is cleaned, the solution cannot continue to treat wastewater, affecting its efficiency. Therefore, this application proposes a wastewater treatment device based on a reverse osmosis membrane. Utility Model Content

[0003] This invention provides a wastewater treatment device based on a reverse osmosis membrane, which solves the problem mentioned in the background art that the wastewater treatment device cannot continue to treat wastewater when the reverse osmosis membrane module is cleaned, thus affecting the working efficiency of the wastewater treatment device.

[0004] This utility model provides the following technical solution: a wastewater treatment device based on a reverse osmosis membrane, including a reverse osmosis membrane module, a high-pressure pump, a cleaning pump, a concentrate extraction pump, and a pure water extraction pump. The reverse osmosis membrane module has multiple working reverse osmosis membrane tubes and one compensating reverse osmosis membrane tube inside its cavity. The working reverse osmosis membrane tubes have the same structure as the compensating reverse osmosis membrane tube. One end of each working reverse osmosis membrane tube has an inlet main pipe and a first branch pipe. The top end of the inlet main pipe is fixed with a first branch pipe, a second branch pipe, and a third branch pipe. The outlet of the high-pressure pump is connected to the second branch pipe via a wastewater inlet pipe. The outlet of the cleaning pump is connected to the first branch pipe via a cleaning fluid inlet pipe. The third branch pipe is connected to the concentrate pipe via a one-way valve. The other end of the reverse osmosis membrane tube is provided with a concentrate discharge pipe and a first pure water discharge pipe. The other end of the concentrate discharge pipe is fixed with a fourth branch pipe, a fifth branch pipe and another third branch pipe. Two adjacent fifth branch pipes are connected by a cleaning liquid discharge pipe. The inlet of the concentrate extraction pump is connected to the fourth branch pipe through the concentrate extraction pipe. The other third branch pipe is connected to the concentrate pipe through a one-way valve. The concentrate pipe is uniformly provided with flow-blocking valves. The other end of the first pure water discharge pipe is provided with a sixth branch pipe, a seventh branch pipe and an eighth branch pipe. The inlet of the pure water extraction pump is connected to the seventh branch pipe through the pure water extraction pipe. Two adjacent eighth branch pipes are connected by a second pure water discharge pipe. Two adjacent sixth branch pipes are connected by a cleaning liquid discharge pipe.

[0005] Preferably, both the outlet end of the concentrated water extraction pump and the outlet end of the pure water extraction pump are equipped with another one-way valve.

[0006] Preferably, an electric ball valve is provided at one end of the first branch pipe, one end of the second branch pipe, one end of the third branch pipe, one end of the fourth branch pipe, one end of the fifth branch pipe, one end of the sixth branch pipe, one end of the seventh branch pipe, and one end of the eighth branch pipe.

[0007] Preferably, the outlet of the pure water extraction pump is connected to the second pure water discharge pipe via a pipe; the outlet of the concentrated water extraction pump is connected to the concentrated water pipe via a pipe.

[0008] Preferably, a flow-blocking valve is provided between one-way valve one and one-way valve two connected by a reverse osmosis membrane tube.

[0009] Preferably, the first branch pipe is Y-shaped, with the inlet end of the first branch pipe connected to the cleaning fluid inlet pipe, one outlet end of the first branch pipe connected to the inner cavity of the main pipe, and the other outlet end of the first branch pipe extending into the inner cavity of the reverse osmosis membrane tube or the compensating reverse osmosis membrane tube.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. The wastewater treatment device based on reverse osmosis membranes allows for sequential cleaning of the reverse osmosis membrane tubes within the reverse osmosis membrane assembly, without affecting the operation of the wastewater treatment device during the cleaning process, thus improving the working efficiency of the wastewater treatment device.

[0012] 2. This wastewater treatment device based on reverse osmosis membranes, through the setting of a concentrate extraction pump and a pure water extraction pump, allows the concentrate extraction pump to extract wastewater remaining in the reverse osmosis membrane tubes in use or in the compensation reverse osmosis membrane tubes, and the pure water extraction pump to extract pure water remaining in the reverse osmosis membrane tubes in use or in the compensation reverse osmosis membrane tubes, which facilitates the cleaning of the reverse osmosis membrane tubes in use or in the compensation reverse osmosis membrane tubes by the device. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a three-dimensional schematic diagram of the reverse osmosis membrane module of this utility model;

[0015] Figure 3 The structure of this utility model Figure 2 Internal diagram;

[0016] Figure 4 The structure of this utility model Figure 2 Cross-sectional diagram;

[0017] Figure 5 This is a schematic diagram of the reverse osmosis membrane tube used in the structure of this utility model;

[0018] Figure 6 The structure of this utility model Figure 5 Rear view illustration.

[0019] In the diagram: 1. Reverse osmosis membrane module; 2. Reverse osmosis membrane tubing; 3. Wastewater inlet pipe; 4. Concentrate pipe; 5. Flow control valve; 6. Second pure water outlet pipe; 7. Concentrate extraction pipe; 8. Cleaning solution outlet pipe two; 9. Pure water extraction pipe; 10. Cleaning solution inlet pipe; 11. Cleaning solution outlet pipe one; 12. Inlet to main pipeline; 13. Concentrate outlet pipe; 14. First pure water outlet pipe; 15. Eighth branch pipe; 16. Sixth branch pipe; 17. Second branch pipe; 18. First branch pipe; 19. Check valve two; 20. Electric ball valve; 21. Third branch pipe; 22. Fifth branch pipe; 23. Fourth branch pipe; 24. Seventh branch pipe; 25. High-pressure pump; 26. Cleaning pump; 27. Concentrate extraction pump; 28. Pure water extraction pump; 29. ​​Compensating reverse osmosis membrane tubing; 30. Check valve one. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This invention provides a wastewater treatment device based on a reverse osmosis membrane, including a reverse osmosis membrane module 1, a high-pressure pump 25, a cleaning pump 26, a concentrate extraction pump 27, and a pure water extraction pump 28. The reverse osmosis membrane module has multiple working reverse osmosis membrane tubes 2 and one compensation reverse osmosis membrane tube 29 inside its cavity, and the structures of the working reverse osmosis membrane tubes 2 and the compensation reverse osmosis membrane tube 29 are identical. By using the reverse osmosis membrane tubes 2, the device can treat wastewater using the working reverse osmosis membrane tubes 2 during operation. During the cleaning process of the working reverse osmosis membrane tubes 2, the compensation reverse osmosis membrane tube 29 can replace the reverse osmosis membrane tubes being cleaned to treat the wastewater, ensuring that the number of times the wastewater is treated by reverse osmosis remains constant and guaranteeing the quality of wastewater treatment.

[0022] The aforementioned reverse osmosis membrane tube 2 is provided with an inlet main pipe 12 and a first branch pipe 18 at one end. The top end of the inlet main pipe 12 is fixed with a first branch pipe 18, a second branch pipe 17, and a third branch pipe 21. The inlet end of the first branch pipe 18, one end of the second branch pipe 17, and one end of the third branch pipe 21 are all provided with electric ball valves 20. The outlet end of the high-pressure pump 25 is connected to the second branch pipe 17 through the wastewater inlet pipe 3. The outlet end of the cleaning pump 26 is connected to the first branch pipe 18 through the cleaning liquid inlet pipe 10. In this application, the first branch pipe 18 is Y-shaped. The inlet end of the first branch pipe 18 is connected to the cleaning liquid inlet pipe 10. One outlet end of the first branch pipe 18 is connected to the inner cavity of the inlet main pipe 12. The other outlet end of the first branch pipe 18 extends into the inner cavity of the reverse osmosis membrane tube 2 or the compensating reverse osmosis membrane tube 29. This arrangement facilitates the cleaning of the reverse osmosis membrane tube 2 or the compensating reverse osmosis membrane tube 29 by the cleaning liquid. The third branch pipe 21 is connected to the concentrate pipe 4 via a one-way valve 30.

[0023] As described above, the high-pressure pump 25 pumps the wastewater to be treated into the wastewater inlet pipe 3. When the electric ball valve 20 on the second branch pipe 17 is open, the wastewater can enter the usable reverse osmosis membrane tube 2 through the second branch pipe 17 and the main inlet pipe 12 connected to the second branch pipe 17. The reverse osmosis membrane tube 2 can then treat the wastewater. The cleaning pump 26, when operating, directs the cleaning solution used to clean the reverse osmosis membrane tube 2 and the compensating reverse osmosis membrane tube 29 into the cleaning pipe 10. When the electric ball valve 20 on the first branch pipe 18 is open, the cleaning solution can enter the inner cavity of the reverse osmosis membrane tube 2, thus cleaning the reverse osmosis membrane tube 2. The concentrate in the concentrate pipe 4 can enter the third branch pipe 21 through the one-way valve 30. When the electric ball valve 20 on the third branch pipe 21 is open, the concentrate in the concentrate pipe 4 can enter the reverse osmosis membrane pipe 2 for further treatment.

[0024] The other end of the reverse osmosis membrane tube 2 is provided with a concentrate discharge pipe 13 and a first pure water discharge pipe 14. The concentrate formed after treatment enters the concentrate discharge pipe 13, and the pure water formed during the wastewater treatment process enters the first pure water discharge pipe 14.

[0025] The other end of the concentrate discharge pipe 13 is fixed with a fourth branch pipe 23, a fifth branch pipe 22, and another third branch pipe 21. One end of the fourth branch pipe 23, one end of the fifth branch pipe 22, and one end of the other third branch pipe 21 are all equipped with an electric ball valve 20. The inlet of the concentrate extraction pump 27 is connected to the fourth branch pipe 23 via the concentrate extraction pipe 7. The concentrate extraction pump 27 can extract the residual concentrate in the reverse osmosis membrane tube 2 or the compensating reverse osmosis membrane tube 29 to be cleaned, facilitating the cleaning of the reverse osmosis membrane tube 2 or the compensating reverse osmosis membrane tube 29. Two adjacent fifth branch pipes 22 are connected via a cleaning liquid discharge pipe 11. The liquid generated after cleaning the side of the reverse osmosis membrane in contact with wastewater is discharged through the cleaning liquid discharge pipe 11. Another third branch pipe 21 is connected to the concentrate pipe 4 through one-way valve 2 19. With the setting of one-way valve 2 19, concentrate can be injected into the concentrate pipe 4 through the other third branch pipe 21 and one-way valve 2 19.

[0026] The concentrate pipe 4 is uniformly equipped with flow-blocking valves 5. The flow-blocking valve 5 is provided between the one-way valve 30 and the one-way valve 19 on the reverse osmosis membrane pipe 2 or the compensating reverse osmosis membrane pipe 29. By setting the flow-blocking valve 5, the concentrate discharged from the reverse osmosis membrane pipe 2 or the compensating reverse osmosis membrane pipe 29 can be prevented from flowing back into the reverse osmosis membrane pipe 2 or the compensating reverse osmosis membrane pipe 29 along the one-way valve 30, and the concentrate can be made to flow only into the adjacent reverse osmosis membrane pipe 2 or the compensating reverse osmosis membrane pipe 29 that is in operation.

[0027] The other end of the first pure water discharge pipe 14 is provided with a sixth branch pipe 16, a seventh branch pipe 24, and an eighth branch pipe 15. One end of the sixth branch pipe 16, one end of the seventh branch pipe 24, and one end of the eighth branch pipe 15 are each equipped with an electric ball valve 20. The inlet of the pure water extraction pump 28 is connected to the seventh branch pipe 24 via a pure water extraction pipe 9. The pure water extraction pump 28 can extract residual pure water from the reverse osmosis membrane tube 2 or the compensation reverse osmosis membrane tube 29 that is to be cleaned. Two adjacent eighth branch pipes 15 are connected via a second pure water discharge pipe 6. The pure water formed after the wastewater undergoes reverse osmosis treatment is discharged through the second pure water discharge pipe 6. Two adjacent sixth branch pipes 16 are connected via a second cleaning liquid discharge pipe 8. The wastewater formed when cleaning the side of the reverse osmosis membrane in contact with pure water is discharged through the second cleaning liquid discharge pipe 8.

[0028] Both the outlet of the concentrate extraction pump 27 and the outlet of the pure water extraction pump 28 are equipped with another one-way valve 19. The outlet of the pure water extraction pump 28 is connected to the second pure water discharge pipe 6 via a pipe; the outlet of the concentrate extraction pump 27 is connected to the concentrate pipe 4 via a pipe. The installation of the other one-way valve 19 can prevent the backflow of concentrate or pure water.

[0029] All electrical components involved in this application are prior art. Those skilled in the art understand their connection methods. With the help of those skilled in the art, all electrical components in this application and their compatible power supplies can be connected by wires. According to the actual situation, a suitable controller can be selected to meet the control requirements. For specific connections and control sequences, please refer to the description below. The electrical connection between each electrical component is completed in the order of operation. The detailed connection methods are well known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.

[0030] In summary: When this reverse osmosis membrane-based wastewater treatment device is in use, under the action of the high-pressure pump 25, the wastewater to be treated enters the wastewater inlet pipe 3. The wastewater in the wastewater inlet pipe 3 enters the reverse osmosis membrane chamber of the reverse osmosis membrane tube 2 through the second branch pipe 17. After treatment, the resulting pure water enters the second pure water outlet pipe 6 through the eighth branch pipe 15. The generated concentrated water enters the inner cavity of the concentrated water pipe 4 through the concentrated water outlet pipe 13 and the one-way valve 19. The concentrated water flowing in the concentrated water pipe 4 enters another reverse osmosis membrane tube 2 adjacent to the aforementioned reverse osmosis membrane tube 2 through the one-way valve 30. The other reverse osmosis membrane tube 2 can further treat the wastewater that has undergone the initial reverse osmosis. If it is necessary to clean the reverse osmosis membrane tube 2, the compensation reverse osmosis membrane tube 29 will replace the reverse osmosis membrane tube 2 being cleaned to treat the wastewater. The cleaning operation for the reverse osmosis membrane tube 2 is as follows: the residual concentrated water in the reverse osmosis membrane tube 2 to be cleaned is extracted using the concentrated water extraction pump 27, the residual pure water in the reverse osmosis membrane tube 2 is extracted using the pure water extraction pump 28, and the cleaning solution for cleaning the reverse osmosis membrane tube 2 is pumped into the cleaning solution inlet pipe 10 using the cleaning solution inlet pipe 10. The cleaning solution in the cleaning solution inlet pipe 10 enters the reverse osmosis membrane space and the inner cavity of the reverse osmosis membrane tube 2 along the first branch pipe 18 on the reverse osmosis membrane tube 2 to be cleaned. The waste liquid generated when cleaning the side of the reverse osmosis membrane in contact with wastewater is discharged through the cleaning solution discharge pipe 11, and the waste liquid generated when cleaning the side of the reverse osmosis membrane in contact with pure water is discharged through the cleaning solution discharge pipe 28.

[0031] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment apparatus based on a reverse osmosis membrane, comprising a reverse osmosis membrane module (1), a high-pressure pump (25), a cleaning pump (26), a concentrated water extraction pump (27), and a pure water extraction pump (28), characterized by: The inner cavity of the reverse osmosis membrane assembly (1) is provided with a plurality of reverse osmosis membrane tubes (2) and a compensation reverse osmosis membrane tube (29), the structure of the reverse osmosis membrane tube (2) is the same as that of the compensation reverse osmosis membrane tube (29), one end of the reverse osmosis membrane tube (2) is provided with an entering main pipe (12) and a first branch pipe (18), the top end of the entering main pipe (12) is fixed with a first branch pipe (18), a second branch pipe (17) and a third branch pipe (21), the water outlet end of the high-pressure pump (25) is connected with the second branch pipe (17) through a waste water entering pipe (3), the water outlet end of the cleaning pump (26) is connected with the first branch pipe (18) through a cleaning liquid entering pipe (10), the third branch pipe (21) is connected with a concentrated water pipe (4) through a one-way valve (30), the other end of the reverse osmosis membrane tube (2) is provided with a concentrated water discharge pipe (13) and a first pure water discharge pipe (14), the other end of the concentrated water discharge pipe (13) is fixed with a fourth branch pipe (23), a fifth branch pipe (22) and another third branch pipe (21), adjacent two fifth branch pipes (22) are connected through a cleaning liquid discharge pipe (11), the water inlet end of the concentrated water pumping pump (27) is connected with the fourth branch pipe (23) through a concentrated water pumping pipe (7), the other third branch pipe (21) is connected with the concentrated water pipe (4) through a one-way valve (19), and the concentrated water pipe (4) is uniformly provided with a flow resistance valve (5), the other end of the first pure water discharge pipe (14) is provided with a sixth branch pipe (16), a seventh branch pipe (24) and an eighth branch pipe (15), the water inlet end of the pure water pumping pump (28) is connected with the seventh branch pipe (24) through a pure water pumping pipe (9), adjacent two eighth branch pipes (15) are connected through a second pure water discharge pipe (6), and adjacent two sixth branch pipes (16) are connected through a cleaning liquid discharge pipe (8).

2. The reverse osmosis membrane-based wastewater treatment apparatus according to claim 1, characterized by: The water outlet end of the concentrated water pumping pump (27) and the water outlet end of the pure water pumping pump (28) are both provided with another one-way valve (19).

3. The reverse osmosis membrane-based wastewater treatment device according to claim 1, characterized by: The one end of the first branch pipe (18), the one end of the second branch pipe (17), the one end of the third branch pipe (21), the one end of the fourth branch pipe (23), the one end of the fifth branch pipe (22), the one end of the sixth branch pipe (16), the one end of the seventh branch pipe (24) and the one end of the eighth branch pipe (15) are all provided with an electric ball valve (20).

4. The reverse osmosis membrane-based wastewater treatment device according to claim 2, characterized by: The water outlet end of the pure water pumping pump (28) is connected with the second pure water discharge pipe (6) through a pipeline, and the water outlet end of the concentrated water pumping pump (27) is connected with the concentrated water pipe (4) through a pipeline.

5. The reverse osmosis membrane-based wastewater treatment device according to claim 1, characterized in that: A flow resistance valve (5) is arranged between the one-way valve (30) and the one-way valve (19) connected with the reverse osmosis membrane tube (2).

6. The reverse osmosis membrane-based wastewater treatment device of claim 1, wherein: The first branch pipe (18) is Y-shaped, the liquid inlet end of the first branch pipe (18) is connected with the cleaning liquid entering pipe (10), one liquid outlet end of the first branch pipe (18) is connected with the inner cavity of the entering main pipe (12), and the other liquid outlet end of the first branch pipe (18) extends into the inner cavity of the reverse osmosis membrane tube (2) or the compensation reverse osmosis membrane tube (29).

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