A self-cleaning filter device built into the RO system

Abstract

This utility model relates to the field of reverse osmosis treatment technology and proposes a self-cleaning filter device with an internal RO filter screen. The device includes a housing, a guide pipe coaxially fixed inside the housing, and an RO membrane assembly wound around the guide pipe. The housing contains a sludge storage chamber, a purification chamber, a concentrate chamber, and a clean water chamber arranged sequentially along the water inlet direction. The RO membrane assembly is placed in the purification chamber. A guide hole is provided inside the housing to connect the purification chamber and the concentrate chamber. In this utility model, the sludge storage chamber is equipped with a first elastic plug and a second elastic plug to control the opening and closing of the raw water inlet pipe and the drain pipe. The structural design of the first and second elastic plugs in conjunction with the guide pipe enables the device to have a backwashing function. Pressurized clean water can be injected into the concentrate chamber through the backwash pipe to backwash the RO membrane assembly and the filter screen. Compared with existing technologies, this eliminates the need for frequent disassembly and cleaning of the filter screen, extending the maintenance cycle. Furthermore, it enables automatic closure of the inlet end, thus preventing wastewater diversion.

Description

Technical Field

[0001] This utility model relates to the field of reverse osmosis treatment technology, specifically to a self-cleaning filter device built into the RO pre-treatment area. Background Technology

[0002] Reverse osmosis (RO) is one of the most widely used desalination technologies, applied extensively in seawater desalination, industrial wastewater treatment, and reclaimed water reuse. An RO membrane (reverse osmosis membrane) concentrate desalination and purification unit is a specialized system designed to treat the high-salinity concentrate (i.e., "concentrated brine") produced by the reverse osmosis process. It achieves salt separation, resource recovery, or compliant discharge through salt separation and purification technologies. Its core objective is to address the problems of "difficult treatment and high pollution" of concentrate in traditional reverse osmosis processes, while simultaneously exploring the potential value of salt resources within the concentrate.

[0003] A search revealed that CN214360565U discloses a filter for preventing RO membrane clogging, which reduces the occurrence of RO membrane clogging and improves practicality. Specifically, it includes a delivery pipe with an internal cavity containing an RO membrane, the delivery pipe cavity being connected to the RO membrane. A filter is located at the left end of the delivery pipe, connecting to the right end of the filter. The filter has a slot with a filter screen attached, the slot connecting to the filter screen. A fixing cylinder is located at the left end of the filter screen, connecting to the right end of the fixing cylinder. An input pipe is located at the left end of the fixing cylinder, connecting to the right end of the input pipe. An output pipe is located at the right end of the delivery pipe, connecting to the left end of the output pipe. The input pipe is connected to a water delivery device, and the output pipe is connected to a water storage device.

[0004] The technology has the following problems: It uses a filter with a built-in filter screen at the inlet of the RO membrane to intercept and filter the raw water before it enters the RO membrane, thereby preventing the RO membrane from clogging. However, the filter screen needs to be disassembled and manually cleaned from time to time, which is inconvenient for cleaning the filter screen. Utility Model Content

[0005] This invention proposes a built-in self-cleaning filter device before RO, which solves the problem that the filter needs to be disassembled and cleaned irregularly in the prior art.

[0006] The technical solution of this utility model is as follows: A self-cleaning filter device built into an RO system includes a housing, a guide tube coaxially fixed inside the housing, and an RO membrane assembly wound around the outside of the guide tube. The housing contains a sludge storage chamber, a purification chamber, a concentrate chamber, and a clean water chamber arranged sequentially along the water inlet direction. The RO membrane assembly is placed inside the purification chamber. A guide hole is provided inside the housing to connect the purification chamber and the concentrate chamber. The guide tube has several micro-flow holes on its inner side, which is connected to the clean water chamber. A screen is provided on the side of the RO membrane assembly near the water inlet. A movable chamber and a through hole connecting the movable chamber and the sludge storage chamber are provided on the inner side of one end of the guide tube located in the sludge storage chamber. A first elastic plug and a second elastic plug that cooperate with the first elastic plug are provided inside the sludge storage chamber. A drain pipe communicating with the movable chamber is provided inside the guide tube.

[0007] Preferably, one end of the outer shell is provided with a raw water inlet pipe, which extends into the sludge storage chamber and is provided with a sliding groove for the first elastic plug to slide and extend.

[0008] Preferably, the first elastic plug includes a slide cylinder that slides in conjunction with a slide groove. One end of the slide cylinder extends to the outside of the raw water inlet pipe and is provided with a protruding ring. The protruding ring is elastically connected to the outer shell by a first spring.

[0009] Preferably, the second elastic plug includes a slide rod, which is slidably connected to the guide pipe. One end of the slide rod located inside the guide pipe is fixed with a cylindrical plug that slides against the inner wall of the movable cavity, and the other end of the slide rod is fixed with a conical plug for blocking the raw water inlet pipe. The conical plug is elastically connected to the guide pipe by a second spring.

[0010] Preferably, the intercepting net is sleeved outside the guide pipe, and a limiting ring is provided outside the guide pipe to limit the position of the intercepting net.

[0011] Preferably, the end of the outer shell away from the raw water inlet pipe is provided with a purified water outlet pipe, which is connected to the purified water chamber.

[0012] Preferably, the outer shell is provided with a concentrated water outlet pipe and a backflush pipe that communicate with the concentrated water chamber.

[0013] The beneficial effects of this utility model are as follows: The present invention has a first elastic plug and a second elastic plug installed in the wastewater storage chamber to control the opening and closing of the raw water inlet pipe and the wastewater outlet pipe. The structure design of the first elastic plug and the second elastic plug in conjunction with the guide pipe enables the device to have a backwashing function. Pressurized purified water can be injected into the concentrate chamber through the backwash pipe to backwash the RO membrane module and the interceptor screen. Compared with the prior art, it does not require frequent disassembly and cleaning of the interceptor screen, thus extending the maintenance cycle. It can also achieve automatic closure of the inlet end, thereby preventing wastewater diversion. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a half-sectional view of a pre-RO built-in self-cleaning filter device proposed in this utility model. Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a schematic diagram of the present invention in a non-working state; Figure 4 This is a schematic diagram of the present invention in the purification working state; Figure 5 This is a schematic diagram of the present invention in the backwashing working state; In the diagram: 1. Outer shell; 11. Raw water inlet pipe; 111. Slide groove; 12. Clean water outlet pipe; 13. Concentrate outlet pipe; 14. Backflush pipe; 15. Clean water chamber; 16. Concentrate chamber; 17. Purification chamber; 18. Guide hole; 19. Sludge storage chamber; 2. Flow guide pipe; 21. Microflow hole; 22. Movable chamber; 23. Through hole; 24. Limiting ring; 3. RO membrane module; 4. Interception net; 5. First elastic plug; 51. Slide cylinder; 52. Convex ring; 53. First spring; 6. Second elastic plug; 61. Slide rod; 62. Conical plug; 63. Cylindrical plug; 64. Second spring; 7. Sludge discharge pipe. Detailed Implementation

[0016] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0017] Please see Figure 1 and Figure 2This utility model provides a technical solution: a self-cleaning filter device built into an RO membrane, comprising a housing 1, a guide tube 2 coaxially fixed inside the housing 1, and an RO membrane assembly 3 wound around the outside of the guide tube 2. The housing 1 contains a sludge storage chamber 19, a purification chamber 17, a concentrate chamber 16, and a clean water chamber 15 arranged sequentially along the water inlet direction. The RO membrane assembly 3 is placed inside the purification chamber 17. A guide hole 18 is provided inside the housing 1 to connect the purification chamber 17 and the concentrate chamber 16. The portion of the guide tube 2 located inside the RO membrane assembly 3 has several micro-flow holes 21, allowing purified water to enter the guide tube 2 through the micro-flow holes 21. The guide pipe 2 is connected to the water purification chamber 15. An interception net 4 is provided on the side of the RO membrane module 3 near the water inlet end to intercept large particles of impurities in the water. The guide pipe 2 is provided with a movable chamber 22 and a through hole 23 that connects the movable chamber 22 to the waste storage chamber 19 on the inner side of one end. A first elastic plug 5 and a second elastic plug 6 that cooperate with the first elastic plug 5 are provided in the waste storage chamber 19. A drain pipe 7 that communicates with the movable chamber 22 is provided in the guide pipe 2. The first elastic plug 5 and the second elastic plug 6 are respectively used to control the opening and closing of the raw water inlet pipe 11 and the through hole 23 on the guide pipe 2.

[0018] Furthermore, one end of the outer shell 1 is provided with a raw water inlet pipe 11 for introducing raw water to be treated. The raw water inlet pipe 11 extends into the sludge storage chamber 19 and is provided with a sliding groove 111 for the first elastic plug 5 to slide and extend.

[0019] Furthermore, the first elastic plug 5 includes a slide cylinder 51, which is slidably engaged with the slide groove 111. One end of the slide cylinder 51 extends to the outside of the raw water inlet pipe 11 and is provided with a protruding ring 52. The protruding ring 52 is elastically connected to the outer shell 1 by a first spring 53.

[0020] Furthermore, the second elastic plug 6 includes a slide rod 61, which is slidably connected to the guide pipe 2. One end of the slide rod 61 located inside the guide pipe 2 is fixed with a cylindrical plug 63 that slides against the inner wall of the movable cavity 22. The other end of the slide rod 61 is fixed with a conical plug 62 for blocking the raw water inlet pipe 11. The conical plug 62 is elastically connected to the guide pipe 2 by a second spring 64.

[0021] Furthermore, the intercepting net 4 is sleeved outside the guide pipe 2, and the guide pipe 2 is provided with a limiting ring 24 to limit the intercepting net 4. The intercepting net 4 is fixed to the limiting ring 24 by bolts or buckles. During the backflushing process, the intercepting net 4 and the RO membrane module 3 can be cleaned without manual disassembly and cleaning, reducing the number of maintenance times.

[0022] Furthermore, a purified water outlet pipe 12 is provided at the end of the outer shell 1 away from the raw water inlet pipe 11. The purified water outlet pipe 12 is connected to the purified water chamber 15 and is used to discharge the purified water.

[0023] Furthermore, the outer casing 1 is provided with a concentrated water outlet pipe 13 and a backwash pipe 14 that communicate with the concentrated water chamber 16. The concentrated water outlet pipe 13 is used to discharge the concentrated water generated during the purification process, and the backwash pipe 14 is used to introduce purified water during the backwash process.

[0024] The working principle and usage process of this utility model are as follows: In the non-working state, the device is as follows: Figure 3 As shown, the conical plug 62 and the cylindrical plug 63 are held in a fixed position by the elastic force of the first spring 53 and the second spring 64, thereby sealing the raw water inlet pipe 11 and the through hole 23 respectively. When the booster pump inputs the raw water to be treated into the outer casing 1 through the raw water inlet pipe 11, as shown... Figure 4 Under the action of water pressure, the conical plug 62 can be pushed to compress the second spring 64, thereby opening the raw water inlet pipe 11 while the through hole 23 remains closed. After the large particles of impurities in the water are intercepted by the interception net 4, the water enters the purification chamber 17. After being purified by the RO membrane module 3, the purified water permeates through the micro-flow hole 21 into the guide pipe 2, and then enters the purified water chamber 15 through the guide pipe 2 before being discharged through the purified water outlet pipe 12. The concentrated water produced by purification enters the concentrated water chamber 16 through the guide hole 18 under pressure, and is finally discharged through the concentrated water outlet pipe 13. When cleaning of the unit is required, close the valves on the concentrated water outlet pipe 13 and the raw water inlet pipe 11. Inject pressurized purified water into the concentrated water chamber 16 through the backwash pipe 14, and then backwash the RO membrane module 3 and the filter screen 4 through the guide hole 18. Figure 5 As shown, the conical plug 62 compresses the first spring 53 under the action of the second spring 64 and water pressure. The conical plug 62 blocks the raw water inlet pipe 11 to prevent dirt from entering the raw water inlet pipe 11 during rinsing. At the same time, the cylindrical plug 63 slides and opens the through hole 23, allowing sewage to enter the active cavity 22 through the through hole 23 and then be discharged from the outer shell 1 through the drain pipe 7.

[0025] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A built-in self-cleaning screen device before RO, comprising a shell (1), a flow guide pipe (2) coaxially fixed in the shell (1), and a RO membrane group (3) wound outside the flow guide pipe (2), characterized in that, The outer casing (1) is provided with a sludge storage chamber (19), a purification chamber (17), a concentrate chamber (16), and a clean water chamber (15) in sequence along the water inlet direction. The RO membrane module (3) is placed in the purification chamber (17). A guide hole (18) is provided in the outer casing (1) to connect the purification chamber (17) and the concentrate chamber (16). The guide pipe (2) located inside the RO membrane module (3) has several micro-flow holes (21). The guide pipe (2) is connected to the clean water chamber (15). The RO membrane module (3) is provided with a screen (4) on one side near the inlet end. The guide pipe (2) is provided with a movable cavity (22) and a through hole (23) that connects the movable cavity (22) and the sludge storage cavity (19) on the inner side of one end of the sludge storage cavity (19). The sludge storage cavity (19) is provided with a first elastic plug (5) and a second elastic plug (6) that cooperates with the first elastic plug (5). The guide pipe (2) is provided with a drain pipe (7) that communicates with the movable cavity (22).

2. A built-in self-cleaning screen device before RO according to claim 1, characterized in that, One end of the outer shell (1) is provided with a raw water inlet pipe (11), which extends into the sludge storage chamber (19) and is provided with a sliding groove (111) for the first elastic plug (5) to slide and extend.

3. A built-in self-cleaning screen device before RO according to claim 2, characterized in that, The first elastic plug (5) includes a slide cylinder (51), which is slidably engaged with a slide groove (111). One end of the slide cylinder (51) extends to the outside of the raw water inlet pipe (11) and is provided with a protruding ring (52). The protruding ring (52) is elastically connected to the outer shell (1) by a first spring (53).

4. The RO pre-internal built-in self-cleaning screen device according to claim 3, characterized in that, The second elastic plug (6) includes a slide rod (61), which is slidably connected to the guide pipe (2). One end of the slide rod (61) located inside the guide pipe (2) is fixed with a cylindrical plug (63) that slides against the inner wall of the movable cavity (22). The other end of the slide rod (61) is fixed with a conical plug (62) for sealing the raw water inlet pipe (11). The conical plug (62) is elastically connected to the guide pipe (2) by a second spring (64).

5. The RO pre-internal self-cleaning screen device according to claim 1, wherein, The intercepting net (4) is sleeved outside the guide pipe (2), and a limiting ring (24) is provided outside the guide pipe (2) to limit the intercepting net (4).

6. A built-in self-cleaning screen device before RO according to claim 2, characterized in that, The outer shell (1) is provided with a purified water outlet pipe (12) at the end away from the raw water inlet pipe (11), and the purified water outlet pipe (12) is connected to the purified water chamber (15).

7. A built-in self-cleaning screen device before RO according to claim 6, characterized in that, The outer shell (1) is provided with a concentrated water outlet pipe (13) and a backflush pipe (14) that communicate with the concentrated water chamber (16).

Images