Reverse osmosis water treatment system

Abstract

The present disclosure relates to the technical field of water treatment. Provided is a reverse osmosis water treatment system, comprising a spraying water supplementing pipe, a filter device, a reverse osmosis device and a spraying module which are connected in sequence; a cleaning module is connected to the reverse osmosis device; discharged water obtained after spraying by means of the spraying module, reverse osmosis concentrated water obtained by filtering by means of the filter device and post-cleaning wastewater are all in communication with a water intake end of a water distribution module, and a water output end of the water distribution module is in communication with a wastewater treatment module and the reverse osmosis device; and the wastewater treatment module is configured to treat the discharged water obtained by means of spraying, the reverse osmosis concentrated water and the post-cleaning wastewater to obtain reclaimed water, the reclaimed water flows back to the water distribution module by means of a reclaimed water return pipe, and the water distribution module feeds the reclaimed water into the reverse osmosis device for treatment in preparation for reuse. The reverse osmosis water treatment system provided in the present disclosure can perform collection, treatment and reclaiming on the concentrated water and the post-cleaning wastewater, thereby improving the utilization efficiency of a water resource, and meeting requirements of a high-voltage direct-current converter station.

Description

A reverse osmosis water treatment system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 2024203634811, filed with the Chinese Patent Office on February 27, 2024, entitled “A Reverse Osmosis Water Treatment System,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the technical field of water treatment, and in particular to a reverse osmosis water treatment system. Background Art

[0004] One of the key factors for the long-term stable operation of HVDC converter stations is the stable operation of the external cooling system. The finned heat exchange tubes, a key heat exchange component of the external cooling system (hereinafter referred to as "external cooling"), are exposed to the outside world for a long time. In the presence of poor water quality, they are prone to bacterial and fouling growth, increasing the fouling coefficient of the external cooling heat exchanger, leading to poor heat transfer and indirectly increasing the system's energy consumption. To avoid these problems, improving the quality of external cooling water is imperative. Purifying external cooling spray cooling water through a water treatment system is a common method currently used in the market.

[0005] The water treatment equipment commonly used in HVDC converter stations is not laid out properly and cannot collect and reuse reverse osmosis concentrate and cleaning wastewater at the same time, resulting in low water resource utilization efficiency.

[0006] Application Contents

[0007] To address the deficiencies in the prior art, the present disclosure provides a reverse osmosis water treatment system that can collect, treat and regenerate concentrated water and cleaning wastewater, thereby improving water resource utilization efficiency and meeting the needs of high-voltage direct current converter stations.

[0008] The present disclosure adopts the following technical solutions.

[0009] A reverse osmosis water treatment system includes a reverse osmosis device, and the reverse osmosis water treatment system also includes: a spray water replenishing pipe, a filter device, a spray module, a cleaning module and a water distribution module; wherein the spray water replenishing pipe, the filter device, the reverse osmosis device and the spray module are connected in sequence; the cleaning module is connected to the reverse osmosis device and is used to flush the reverse osmosis device to obtain cleaning wastewater after flushing; the external drainage obtained after spraying by the spray module, the reverse osmosis concentrated water obtained after filtering by the filter device and the cleaning wastewater are all connected to the water inlet end of the water distribution module, and the water outlet end of the water distribution module is connected to the wastewater treatment module and the reverse osmosis device; the wastewater treatment module is used to treat the spray water external drainage, the reverse osmosis concentrated water and the cleaning wastewater to obtain regenerated water, and the regenerated water flows back to the water distribution module through the regenerated water return pipe, and the water distribution module sends the regenerated water to the reverse osmosis device for treatment for reuse.

[0010] Preferably, the spray module includes an upper box body of a cooling tower, a lower box body of a cooling tower and a spray water pool, the upper box body is arranged above the lower box body and is connected to the lower box body, and the bottom of the lower box body is connected to the spray water pool; the upper box body is connected to the water outlet end of the reverse osmosis device through a reverse osmosis outlet pipe; the spray water pool is connected to the upper box body through a first pipeline, and a spray pump is provided in the spray water pool for driving the spray water to flow to the first pipeline.

[0011] Preferably, the spray module further comprises a softened water pool, the softened water pool and the spray water pool are separated by a vertically arranged partition, and the pool opening heights of the softened water pool and the spray water pool are greater than the partition height.

[0012] Preferably, the filtering device comprises: a quartz sand filter, an activated carbon filter and a security filter connected in sequence.

[0013] Preferably, the reverse osmosis water treatment system further includes a backwash water pump; the water inlet end of the quartz sand filter is connected to the backwash water pump through a first backwash pipeline; the water inlet end of the activated carbon filter is connected to the backwash water pump through a second backwash pipeline.

[0014] Preferably, the filtering device is connected to the reverse osmosis device through a high-pressure pump, and the high-pressure pump is arranged between the security filter and the reverse osmosis device.

[0015] Preferably, the connecting pipeline between the safety filter and the high-pressure pump is connected to a dosing barrel, and the dosing barrel is filled with a scale inhibitor or a bactericide.

[0016] Preferably, the cleaning module includes a cleaning water tank, a cleaning filter and a cleaning water pump which are connected in sequence, and the cleaning water pump is connected to the reverse osmosis device through a cleaning pipe.

[0017] Preferably, the water outlet end of the reverse osmosis device is provided with a liquid infusion pipe, which is used to take clean water filtered by the reverse osmosis device; the liquid infusion pipe is provided with a liquid infusion valve.

[0018] Preferably, the reverse osmosis water treatment system further comprises a sewage pump connected to the water distribution module for pumping out impurities deposited at the bottom thereof, and the sewage pump is connected to a sewage pipe for removing impurities from outside the system.

[0019] The beneficial effect of the present disclosure is that, compared with the prior art, the present disclosure collects reverse osmosis concentrated water, cleaning wastewater and drainage outside the spray pool by setting up a water distribution module, and can process and reuse the collected water through a wastewater treatment module. Its water resource utilization efficiency is higher, the layout is more reasonable, and it is easy to maintain, and it can be applied to application scenarios of high-voltage direct current converter stations.

[0020] In addition, in order to further improve the water resource utilization rate of the present invention, a liquid replenishment pipe is set at the water outlet end of the reverse osmosis device, through which qualified clean water obtained by reverse osmosis filtration can be taken to replenish the system or supply it to the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic diagram of a reverse osmosis water treatment system in the present disclosure;

[0022] FIG2 is a structural schematic diagram 1 of the reverse osmosis water treatment system of the present disclosure;

[0023] FIG3 is a second structural diagram of the reverse osmosis water treatment system in the present disclosure;

[0024] FIG4 is a third structural diagram of the reverse osmosis water treatment system in the present disclosure.

[0025] In the picture:

[0026] 1. Spray water replenishment pipe; 101. Liquid inlet valve; 2. Quartz sand filter; 3. Activated carbon filter; 4. Security filter; 5. Softened water tank; 6. Spray water tank; 7. First pipeline; 8. Upper box; 9. Lower box; 10. Wastewater treatment module; 11. Cleaning water tank; 12. Reverse osmosis device; 13. Cleaning filter; 14. Liquid replenishment pipe; 141. Liquid replenishment valve; 15. Backwash water pump; 16. Second pipeline; 17. Sewage discharge pipe; 18. Sewage pump; 19. Regenerated water pump; 20. Wastewater pump; 21. Cleaning water pump; 22. Drain valve; 23. Water distribution module; 24. Concentrated water collection pipe; 241. Concentrated water valve; 25. Cleaning pipe; 251. Cleaning valve; 26. Reverse osmosis outlet pipe; 261. Reverse osmosis outlet valve; 27. First backwash pipeline; 28. First backwash valve; 29. ​​Second backwash valve; 30. Regenerated water return pipe; 301. Regenerated water return valve. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present disclosure more clear, the technical solutions of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. The embodiments described in the present disclosure are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the spirit of the present disclosure, other embodiments obtained by ordinary technicians in this field without making any creative efforts are all within the scope of protection of the present disclosure.

[0028] As shown in Figures 1, 3 and 4, Example 1 of the present disclosure provides a reverse osmosis water treatment system, including: a spray water replenishing pipe 1, a filter device, a high-pressure pump, a reverse osmosis device 12 and a spray module connected in sequence; the reverse osmosis device 12 and the spray module are connected to the backwash water pump 15 through a second pipeline 16, and are connected to the filter device through the backwash water pump 15 to backwash the filter device.

[0029] The reverse osmosis water treatment system also includes a cleaning module and a water distribution module 23. The cleaning module is connected to the reverse osmosis device 12 and is used to flush the reverse osmosis device 12 to obtain cleaning wastewater after flushing; the reverse osmosis device 12 is provided with a concentrated water collection pipe 24 for collecting reverse osmosis concentrated water, and the concentrated water collection pipe 24 is connected to the water distribution module 23. The concentrated water collection pipe 24 is provided with a concentrated water valve 241; the external drainage obtained after spraying by the spray module, the reverse osmosis concentrated water obtained by filtering through the filter device, and the cleaning wastewater are all connected to the water inlet end of the water distribution module 23, and the water outlet end of the water distribution module 23 is connected to the wastewater treatment module 10 and the reverse osmosis device 12.

[0030] The wastewater treatment module 10 is equipped with a wastewater pump 20. The wastewater discharged after spraying, the reverse osmosis concentrated water, and the cleaning wastewater enter the wastewater treatment module 10 under the power of the wastewater pump 20. The wastewater treatment module 10 is used to treat the reverse osmosis concentrated ion water with excessive ion concentration. The wastewater treatment module 10 processes the spray water, the reverse osmosis concentrated water, and the cleaning wastewater to produce regenerated water. The regenerated water flows back to the water distribution module 23 through the regenerated water return pipe 30 under the action of the regenerated water pump 19. The water distribution module 23 sends the regenerated water to the reverse osmosis device 12 for processing and reuse. The regenerated water return pipe 30 is equipped with a regenerated water return valve 301 to facilitate the control of the regenerated water return pipe 30.

[0031] As shown in FIG4 , in a preferred but non-limiting embodiment disclosed herein, a refill pipe 14 is further provided at the water outlet of the reverse osmosis device 12. The refill pipe 14 is provided with a refill valve 141. The provision of the refill pipe 14 facilitates access to the clean water filtered by the reverse osmosis device 12, facilitates refilling the system, and can also be used to supply water to the outside, thereby improving water resource utilization. As shown in FIG2 , in a preferred but non-limiting embodiment disclosed herein, the spray module includes a cooling tower upper box 8, a cooling tower lower box 9, and a spray pool 6. The upper box 8 is provided above the lower box 9 and is connected to the lower box 9. The bottom of the lower box 9 is connected to the spray pool 6. The water outlet end of the reverse osmosis device 12 is connected to the upper box body 8 through the reverse osmosis water outlet pipe 26. The spray water enters the cooling tower and is sprayed toward the lower box body 9. After spraying, it falls into the spray water pool 6 for storage; the spray water pool 6 is connected to the upper box body 8 through the first pipeline 7. A spray pump is provided in the spray water pool 6. Under the action of the spray pump, the spray water in the spray water pool 6 flows back to the upper box body 8 through the first pipeline 7 to realize circulation.

[0032] In a preferred but non-limiting embodiment of the present disclosure, the spray module further includes a softened water tank 5, which is separated from a spray tank 6 by a vertical partition. The height of the softened water tank 5 and the spray tank 6 is greater than the height of the partition, so that the tops of the softened water tank 5 and the spray tank 6 are interconnected. The spray water first enters the softened water tank 5 for storage until the water level is higher than the height of the partition, and then the reverse osmosis water enters the spray tank 6. In a preferred but non-limiting embodiment of the present disclosure, the filtration device includes: a quartz sand filter 2, an activated carbon filter 3, and a security filter 4 connected in sequence. The water inlet of the quartz sand filter 2 is connected to the backwash water pump 15 via a first backwash line 27, and the water inlet of the activated carbon filter 3 is connected to the backwash water pump 15 via a second backwash line. In addition, the first backwash line 27 is provided with a first backwash valve 28, and the second backwash line is provided with a second backwash valve 29.

[0033] The spray water replenishment pipe 1 is used to introduce spray water replenishment water, and the spray water replenishment pipe 1 is provided with a liquid inlet valve 101. The spray water replenishment water is the water source of the external cooling device and can be an untreated water source, such as industrial tap water. The quartz sand filter provided is capable of filtering impurities larger than 50 μm through the principle of mechanical filtration. The activated carbon filter provided is capable of filtering impurities larger than 5 μm through the principle of adsorption. The security filter provided is capable of filtering impurities larger than 5 μm through the principle of mechanical filtration. The reverse osmosis device 11 provided is capable of filtering impurities larger than 0.0001 μm.

[0034] The spray water is first coarsely filtered through the quartz sand filter 2, activated carbon filter 3, and security filter 4. Driven by a high-pressure pump, it then enters the reverse osmosis device 12 for fine filtration. Reverse osmosis concentrated water, cleaning wastewater, and drainage from the spray tank enter the water distribution module 23 for distribution. After being distributed by the water distribution module 23, it flows to the wastewater treatment module 10 for treatment and regeneration. The resulting regenerated water flows back to the reverse osmosis device 12 through the regenerated water return pipe 30 for recovery and reuse after being filtered by the reverse osmosis device 12.

[0035] In a preferred but non-limiting embodiment of the present disclosure, a connecting pipe between the safety filter 4 and the high-pressure pump is connected to a dosing barrel, and an antiscalant or bactericide is added to the dosing barrel to facilitate descaling or sterilization of the circulating liquid.

[0036] As shown in FIG3 , the cleaning module further includes a cleaning water tank 11, a cleaning filter 13, and a cleaning water pump 21, which are connected in sequence. The cleaning water pump 21 is connected to the reverse osmosis device 12 via a cleaning pipe 25, and the cleaning pipe 25 is provided with a cleaning valve 251. Driven by the power of the cleaning water pump 21, the water in the cleaning water tank 11 enters the cleaning filter 13 for filtration. The filtered cleaning water enters the reverse osmosis device 12 through the cleaning pipe 25 to clean the reverse osmosis device 12.

[0037] In a preferred but non-limiting embodiment of the present disclosure, the reverse osmosis water treatment system further includes a sewage pump 18, which is connected to the water distribution module 23 and is used to pump out impurities precipitated at the bottom thereof. The sewage pump 18 is connected to a sewage pipe 17, and the drainage pipe 17 is also provided with a drainage valve 22. By opening the drainage valve 22, impurities can be removed from the system through the drainage pipe 17.

[0038] In a preferred but non-limiting embodiment of the present disclosure, the high-pressure pump, the cleaning water pump 21 and the dosing tank are all provided with one in use and one in reserve, thereby improving the reliability of the system.

[0039] In a preferred but non-limiting embodiment of the present disclosure, the quartz sand filter 2 comprises quartz sand, anthracite, manganese sand, and activated carbon. The activated carbon filter 3 comprises quartz sand and activated carbon. The dosing tank has a capacity of ≥1000 L, with a dosage of 1-250 mg / h. The wash water tank 11 has a capacity of ≥1500 L and is preferably an acid- and alkali-resistant PE tank.

[0040] Regarding the system architecture details above, attention should be paid to the connection method between the various modules during actual equipment production: the equipment primarily connects materials and components through welding and threaded fastening. Threaded fastening uses straight thread sealing and does not involve wrapping with raw tape.

[0041] The beneficial effect of the present disclosure is that, compared with the prior art, the present disclosure collects reverse osmosis concentrated water, cleaning wastewater and drainage outside the spray pool by setting up a water distribution module, and can process and reuse the collected water through a wastewater treatment module. Its water resource utilization efficiency is higher, the layout is more reasonable, and it is easy to maintain, and it can be applied to application scenarios of high-voltage direct current converter stations.

[0042] In addition, in order to further improve the water resource utilization rate of the present invention, a liquid replenishment pipe is set at the water outlet end of the reverse osmosis device, through which qualified clean water obtained by reverse osmosis filtration can be taken to replenish the system or supply it to the outside.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and not to limit them. Although the present disclosure has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present disclosure can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present disclosure should be included in the scope of protection of the claims of the present disclosure. Industrial Applicability

[0044] In summary, the present disclosure provides a reverse osmosis water treatment device, which collects reverse osmosis concentrated water, cleaning wastewater and drainage outside the spray pool by setting a water distribution module, and can process and reuse the collected water through the wastewater treatment module. It has higher water resource utilization efficiency, more reasonable layout, and easy maintenance, and can be suitable for application scenarios of high-voltage direct current converter stations.

Claims

1. A reverse osmosis water treatment system, comprising a reverse osmosis device (12), characterized in that: The reverse osmosis water treatment system further comprises: a spray water replenishing pipe (1), a filter device, a spray module, a cleaning module and a water distribution module; wherein the spray water replenishing pipe (1), the filter device, the reverse osmosis device (12) and the spray module are connected in sequence; The cleaning module is connected to the reverse osmosis device (12) and is used to flush the reverse osmosis device (12) to obtain cleaning wastewater after flushing; the external drainage obtained after spraying by the spraying module, the reverse osmosis concentrated water obtained after filtering by the filtering device, and the cleaning wastewater are all connected to the water inlet end of the water distribution module (23); the water outlet end of the water distribution module (23) is connected to the wastewater treatment module (10) and the reverse osmosis device (12); The wastewater treatment module (10) is used to process the spray water, reverse osmosis concentrated water and cleaning wastewater to obtain regenerated water. The regenerated water flows back to the water distribution module (23) through the regenerated water return pipe (30). The water distribution module (23) sends the regenerated water to the reverse osmosis device (12) for treatment and is then reused.

2. The reverse osmosis water treatment system according to claim 1, characterized in that: The reverse osmosis device (12) is provided with a concentrated water collection pipe (24), which is connected to the water distribution module (24). The concentrated water collection pipe (24) is used to collect reverse osmosis concentrated water.

3. The reverse osmosis water treatment system according to claim 1, characterized in that: The wastewater treatment module (10) is provided with a wastewater pump (20), which is used to allow the external drainage obtained after spraying, the reverse osmosis concentrated water obtained by filtering the filter device, and the cleaning wastewater to enter the wastewater treatment module (10) under the action of power.

4. The reverse osmosis water treatment system according to claim 1, characterized in that: The regenerated water return pipe (30) is provided with a regenerated water return valve (301) for controlling the opening and closing of the regenerated water return pipe (30).

5. The reverse osmosis water treatment system according to claim 1, characterized in that: The spray module comprises an upper box (8) of a cooling tower, a lower box (9) of the cooling tower and a spray pool (6); the upper box (8) is arranged above the lower box (9) and is connected to the lower box (9); the bottom of the lower box (9) is connected to the spray pool (6); the upper box (8) is connected to the water outlet end of the reverse osmosis device (12) through a reverse osmosis water outlet pipe (26); the spray pool (6) is connected to the upper box (8) through a first pipeline (7); and a spray pump for driving spray water to flow toward the first pipeline (7) is provided in the spray pool (6).

6. The reverse osmosis water treatment system according to claim 5, characterized in that: The spray module further comprises a softened water pool (5), the softened water pool (5) and the spray water pool (6) are separated by a vertically arranged partition, and the pool opening heights of the softened water pool (5) and the spray water pool (6) are greater than the partition height.

7. The reverse osmosis water treatment system according to any one of claims 1 to 6, characterized in that: The filtering device comprises: a quartz sand filter (2), an activated carbon filter (3) and a security filter (4) which are connected in sequence.

8. The reverse osmosis water treatment system according to claim 7, characterized in that: The reverse osmosis water treatment system further comprises a backwash water pump (15); the water inlet end of the quartz sand filter (2) is connected to the backwash water pump (15) via a first backwash pipeline (27); and the water inlet end of the activated carbon filter (3) is connected to the backwash water pump (15) via a second backwash pipeline.

9. The reverse osmosis water treatment system according to claim 7, characterized in that: The reverse osmosis device (12) and the spray module are connected to the backwash water pump (15) through a second pipeline (16), and are connected to the filter device through the backwash water pump (15).

10. The reverse osmosis water treatment system according to claim 7, characterized in that: The filtering device is connected to the reverse osmosis device (12) via a high-pressure pump, and the high-pressure pump is arranged between the security filter (4) and the reverse osmosis device (12).

11. The reverse osmosis water treatment system according to claim 11, characterized in that: The connecting pipeline between the safety filter (4) and the high-pressure pump is connected to a medicine-adding barrel, and the medicine-adding barrel is filled with a scale inhibitor or a bactericide.

12. The reverse osmosis water treatment system according to any one of claims 1 to 6, characterized in that: The cleaning module comprises a cleaning water tank (11), a cleaning filter (13) and a cleaning water pump (21) which are connected in sequence, and the cleaning water pump (21) is connected to the reverse osmosis device (12) through a cleaning pipe (25).

13. The reverse osmosis water treatment system according to any one of claims 1 to 6, characterized in that: The water outlet end of the reverse osmosis device (12) is provided with a liquid replenishing pipe (14), and the liquid replenishing pipe (14) is used to take the clean water filtered by the reverse osmosis device (12); the liquid replenishing pipe (14) is provided with a liquid replenishing valve (141).

14. The reverse osmosis water treatment system according to any one of claims 1 to 36, characterized in that: The reverse osmosis water treatment system further comprises a sewage pump (18), which is connected to the water distribution module (23) and is used to pump away impurities precipitated at the bottom thereof. The sewage pump (18) is connected to a sewage pipe (17), which is used to remove impurities from the outside of the system.

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