Three-stage ro treatment device for ammonia-nitrogen-containing wastewater

Abstract

The application relates to the technical field of wastewater treatment, and discloses a three-stage RO (reverse osmosis) ammonia-nitrogen-containing wastewater treatment device, which comprises a reverse osmosis filtering device, the reverse osmosis filtering device comprises a supporting base placed on the ground, a filtering cylinder is connected to the supporting base, a sealing cylinder cover is movably fixed at the end of the filtering cylinder through bolts, the number of the filtering cylinders is at least two, and the filtering cylinders are uniformly distributed in a vertical manner, one side of all the sealing cylinder covers is connected with a water inlet pipe, and the water inlet port of the water inlet pipe is connected with a sewage inlet pipeline; the rotation of the water-driven ring is caused by the impact of water flow, and the rotation is matched with the brush of the cleaning strip, so that the cleaning strip can continuously clean the water inlet port of the RO reverse osmosis membrane body, the device can avoid the continuous accumulation of impurities at the water inlet port of the RO reverse osmosis membrane body, prevent the impurities from forming crystals, and facilitate subsequent cleaning and the prevention of the scratching of the RO reverse osmosis membrane body.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically a three-stage RO treatment device for ammonia nitrogen-containing wastewater. Background Technology

[0002] Osmosis is a physical phenomenon. When two types of water containing different salts are separated by a semi-permeable membrane, water from the side with lower salt concentration permeates through the membrane into the side with higher salt concentration, while the salt itself does not permeate. This process continues until the salt concentrations on both sides become equal; this process is called osmosis, and it usually takes a long time. However, if pressure is applied to the side with higher salt concentration, osmosis can be stopped. This pressure is called osmotic pressure. If the pressure is increased further, water can permeate in the opposite direction, leaving the salt behind.

[0003] Multi-stage RO membrane reverse osmosis treatment is used for ammonia nitrogen wastewater. Because the pores of the RO membrane are so small they are invisible to the naked eye, only water molecules can pass through, while other impurities and heavy metals are discharged through the wastewater pipe. In tertiary treatment, the RO membrane is used for secondary filtration of the concentrated water after the first filtration. This still contains a certain amount of impurities. During filtration, high pressure forces the water through the membrane, causing a large amount of impurities to accumulate and adhere to the inlet side of the membrane. This not only continuously affects the subsequent influent flow rate but also makes it easy for large amounts of impurities to form crystals, increasing the risk of membrane rupture. Furthermore, backwashing is often ineffective due to long-term accumulation. Therefore, a tertiary RO treatment device for ammonia nitrogen wastewater is urgently needed to solve these problems. Summary of the Invention

[0004] To overcome the aforementioned technical problems, the present invention aims to provide a three-stage RO treatment device for ammonia nitrogen-containing wastewater. This addresses the issue that the three-stage treatment described in the background involves a secondary filtration of the concentrated water after the first filtration using an RO membrane, which still contains a certain amount of impurities. During filtration, high pressure forces the water through the membrane, causing a large amount of impurities to accumulate and adhere to the inlet side of the membrane. This not only continuously affects the subsequent influent flow rate but also increases the risk of membrane rupture due to the accumulation of impurities in one area, which can lead to crystal formation. Furthermore, backwashing is often ineffective due to long-term accumulation, resulting in certain inconveniences in practical use.

[0005] This invention provides the following technical solution: a three-stage RO treatment device for ammonia nitrogen-containing wastewater, comprising a reverse osmosis filtration unit. The reverse osmosis filtration unit includes a support base placed on the ground, with filter cartridges connected to the support base. Each filter cartridge has a sealed cap fixed to its end by bolts. The number of filter cartridges is at least two, evenly distributed vertically. One side of each sealed cap is connected to a water inlet pipe, with the inlet port connected to a wastewater inlet pipe for centralized wastewater input. One side of each filter cartridge is embedded with a purified water pipe, with the outlet port connected to a clean water pipe for centralized purified water output. Each filter cartridge contains a support core rod, a porous core rod, and an RO reverse osmosis membrane. The support core rod is located within the RO reverse osmosis system. The inlet side of the membrane and the porous core rod are located on the outlet side of the RO reverse osmosis membrane. The supporting core rod and the porous core rod are an integral component, and the RO reverse osmosis membrane covers the outside of the supporting core rod and the porous core rod. When the supporting core rod, the porous core rod and the RO reverse osmosis membrane are placed in a suitable position in the filter cartridge, the port of the porous core rod is inserted into the water purification pipe for sealing and positioning. An isolation ring seat is sleeved on the outside of the RO reverse osmosis membrane, and the outer surface of the isolation ring seat is tightly fitted with the inner surface of the filter cartridge to separate the space on both sides of the filter cartridge. A first sewage pipe controlled by an electric control valve is set at the bottom end of the filter cartridge near the water purification pipe. The first sewage pipe passes through all the filter cartridges and extends to the outside of the bottom filter cartridge. The output end of the first sewage pipe is connected to the sewage pipe.

[0006] A cleaning mechanism is provided, which is mounted on the support core rod on the water inlet side of the filter cartridge. The cleaning mechanism includes a fixed ring seat, which is sleeved on the support core rod. A second spring is connected to one side of the fixed ring seat, and an mounting ring seat is connected to one side of the second spring. A water-moving ring is movably sleeved on one side of the mounting ring seat via a bearing, and the water-receiving layer of the water-moving ring faces the water inlet side for rotating in response to water flow. A cleaning strip is connected to the side of the water-moving ring near the water inlet port of the RO reverse osmosis membrane, and the cleaning strip is evenly distributed in a ring shape along the midpoint of the water-moving ring. Brush bristles are connected to the side of the cleaning strip near the water inlet port of the RO reverse osmosis membrane.

[0007] A water return mechanism is located at the top of the support base.

[0008] To achieve the above technical solution, the impact of water flow causes the water-moving ring to rotate, which, in conjunction with the brush of the cleaning strip, allows the cleaning strip to continuously clean the inlet port of the RO reverse osmosis membrane, preventing impurities from clogging it. Compared with existing technologies, this device can prevent impurities from continuously accumulating at the inlet port of the RO reverse osmosis membrane, prevent impurities from crystallizing, facilitate subsequent cleaning, and avoid scratching the RO reverse osmosis membrane. In addition, the presence of the second spring causes the water-moving ring and cleaning strip to change position with the impact of water flow, making the cleaning strip more closely attached to the inlet port of the RO reverse osmosis membrane, thus improving its cleaning effect.

[0009] Furthermore, a backwash inlet pipe controlled by an electric valve is provided at the top of the filter cylinder near the water purification pipe, and the backwash inlet pipe passes through all the filter cylinders and extends to the outside of the topmost filter cylinder. The input end of the backwash inlet pipe is connected to the backwash water pipe. A second sewage pipe controlled by an electric valve is provided at the bottom of the filter cylinder near the water inlet pipe, and the second sewage pipe passes through all the filter cylinders and extends to the outside of the bottommost filter cylinder. The output end of the first sewage pipe is connected to the sewage pipe.

[0010] The above technical solution enables this device to perform clean water backwashing.

[0011] Furthermore, an impact-receiving ring is connected to the inner surface of the filter cartridge, and a first spring is uniformly connected in a ring shape on the side of the isolation ring seat near the impact-receiving ring. A rubber ring is connected to one side of the first spring, and the surface of the rubber ring is in contact with the inner surface of the filter cartridge and the outer surface of the RO reverse osmosis membrane.

[0012] The above technical solution enables the rubber ring to move during the continuous backflushing process, and the vibration generated by its reset and the impact of the impacted ring makes it easier to loosen impurities.

[0013] Furthermore, an iron ring is connected to the side of the rubber ring near the impacted ring to assist in impact resistance.

[0014] The above technical solution improves the impact vibration effect.

[0015] Furthermore, the water return mechanism includes a first water return elbow, which is installed at the top of the uppermost filter cylinder, connecting the internal spaces of the filter cylinders on both sides of the isolation ring seat. A blocking pipe is embedded in the first water return elbow, and a water-blocking ring is connected to the inner surface of the blocking pipe. A movable ring is connected to the annular hole of the water-blocking ring, and a moving rod is inserted into the hole of the movable ring. A water-blocking plate is connected to the side of the moving rod near the water outlet port of the first water return elbow, and the outer diameter of the water-blocking plate is larger than the inner diameter of the annular hole of the water-blocking ring. A blocking ball is connected to the side of the moving rod near the water inlet port of the first water return elbow, and the outer diameter of the blocking ball is larger than the diameter of the hole of the movable ring.

[0016] The above technical solution enables the filtered wastewater to be returned to the starting side for repeated filtration.

[0017] Furthermore, the surface of the water baffle is covered with a rubber membrane, and the blocking ball is a rubber component.

[0018] The above technical solutions improve the stability and service life of the water baffle and the blocking ball.

[0019] Furthermore, an auxiliary filter box with an open top is also embedded in the first return water elbow, and the top of the auxiliary filter box is provided with a box cover that is detachably fixed to the auxiliary filter box. The bottom of the box cover is connected to an inclined filter screen plate, and the outer edge of the filter screen plate is covered with a rubber sleeve.

[0020] Implementing the above technical solution facilitates simple filtration of the returned wastewater.

[0021] Furthermore, a hanging rope is connected to the cover on one side of the filter plate, and an impact ball is connected to the bottom end of the hanging rope for assisting impact.

[0022] The above technical solution aims to prevent the filter screen from becoming clogged.

[0023] The technical effects and advantages of this invention are as follows:

[0024] 1. This invention uses the impact of water flow to cause the water-moving ring to rotate, which, together with the brush of the cleaning strip, allows the cleaning strip to continuously clean the water inlet of the RO reverse osmosis membrane, preventing impurities from clogging it.

[0025] 2. This device can prevent impurities from continuously accumulating at the inlet port of the RO reverse osmosis membrane, prevent impurities from crystallizing, facilitate subsequent cleaning, and avoid scratching the RO reverse osmosis membrane.

[0026] 3. The presence of the second spring in this invention causes the water-moving ring and cleaning strip to change position with the impact of the water flow, making the cleaning strip more closely attached to the water inlet port of the RO reverse osmosis membrane and improving its cleaning effect. Attached Figure Description

[0027] Figure 1 This is a top-view perspective of the overall structure of the present invention from the left.

[0028] Figure 2 This is a top-view perspective view of the overall structure of the present invention from the right side.

[0029] Figure 3 This is a top-view perspective view of the overall structure of the present invention, showing the pipe connection in an exploded state.

[0030] Figure 4 This is a top-view perspective view of the exploded state of the filter cartridge structure of the present invention.

[0031] Figure 5 This is a top-view perspective view of the cleaning mechanism structure of the present invention in an exploded state.

[0032] Figure 6 This is a top-view perspective view of the exploded state of the water return mechanism structure of the present invention.

[0033] Figure 7 This is a top-view perspective view of the explosive state of the blocking tube structure of the present invention.

[0034] The attached figures are labeled as follows: 1. Reverse osmosis filtration equipment; 110. Support base; 111. Filter cartridge; 112. Sealing cartridge cover; 113. Support rod; 114. Porous rod; 115. RO reverse osmosis membrane; 116. Clean water pipe; 117. Inlet pipe; 118. First drain pipe; 119. Backflushing inlet pipe; 120. Second drain pipe; 121. Impact ring; 122. Isolation ring seat; 123. First spring; 124. Rubber ring; 125. Iron ring; 2. 210. Cleaning mechanism; 211. Fixed ring seat; 212. Second spring; 213. Mounting ring seat; 214. Hydraulic ring; 215. Cleaning strip; 3. Water return mechanism; 310. First water return elbow; 311. Blocking pipe; 312. Water-blocking ring plate; 313. Movable ring sleeve; 314. Moving rod; 315. Water baffle plate; 316. Blocking ball; 317. Auxiliary filter box; 318. Box cover; 319. Filter screen plate; 320. Rubber sleeve; 321. Suspension rope; 322. Impact ball. Detailed Implementation

[0035] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings.

[0036] Example 1:

[0037] Refer to the attached diagram in the instruction manual. Figure 1-3This invention provides a three-stage RO treatment device for ammonia-nitrogen-containing wastewater, including a reverse osmosis filtration unit 1. The reverse osmosis filtration unit 1 includes a support base 110 placed on the ground, with filter cylinders 111 connected to the support base 110. Each filter cylinder 111 has a sealed cap 112 fixed to its end by bolts. The number of filter cylinders 111 is at least two, and they are evenly distributed vertically. One side of each sealed cap 112 is connected to a water inlet pipe 117, and the inlet port of the water inlet pipe 117 is connected to a wastewater inlet pipe for centralized wastewater input. One side of each filter cylinder 111 is embedded with a clean water pipe 116, and the outlet port of the clean water pipe 116 is connected to a clean water pipe for centralized clean water output. Each filter cylinder 111 contains a support core rod 113, a porous core rod 114, and an RO reverse osmosis membrane 115. The support core rod 113 is located on the water inlet side of the RO reverse osmosis membrane 115, and the porous core rod 114... 4. Located on the outlet side of the RO reverse osmosis membrane 115, the support core rod 113 and the porous core rod 114 are an integral component, and the RO reverse osmosis membrane 115 covers the outside of the support core rod 113 and the porous core rod 114. When the support core rod 113, the porous core rod 114 and the RO reverse osmosis membrane 115 are placed in the appropriate position in the filter cartridge 111, the port of the porous core rod 114 is inserted into the water purification pipe 116 for sealing and positioning. An isolation ring seat 122 is sleeved on the outside of the RO reverse osmosis membrane 115, and the outer surface of the isolation ring seat 122 is tightly attached to the inner surface of the filter cartridge 111 to separate the space on both sides of the filter cartridge 111. A first sewage pipe 118 controlled by an electric control valve is provided at the bottom end of the side of the filter cartridge 111 near the water purification pipe 116. The first sewage pipe 118 passes through all the filter cartridges 111 and extends to the outside of the bottom filter cartridge 111. The output end of the first sewage pipe 118 is connected to the sewage pipe.

[0038] Cleaning mechanism 2 is installed on the support core rod 113 on the water inlet side of filter cartridge 111. Cleaning mechanism 2 includes a fixed ring seat 210, which is sleeved on the support core rod 113. A second spring 211 is connected to one side of the fixed ring seat 210, and an mounting ring seat 212 is connected to one side of the second spring 211. A water-moving ring 213 is movably sleeved on one side of the mounting ring seat 212 through a bearing. The water-receiving layer of the water-moving ring 213 faces the water inlet side and is used to rotate in response to water flow. A cleaning strip 214 is connected to the side of the water-moving ring 213 near the water inlet port of the RO reverse osmosis membrane 115. The cleaning strip 214 is evenly distributed in a ring shape along the midpoint of the water-moving ring 213. Brush bristles are connected to the side of the cleaning strip 214 near the water inlet port of the RO reverse osmosis membrane 115.

[0039] A water return mechanism 3 is located at the top of the support base 110. A backwash inlet pipe 119, controlled by an electrically controlled valve, is located at the top of the filter cylinder 111 near the clean water pipe 116. The backwash inlet pipe 119 penetrates all filter cylinders 111 and extends to the outside of the topmost filter cylinder 111. The inlet end of the backwash inlet pipe 119 is connected to the backwash water pipe. A second drain pipe 120, controlled by an electrically controlled valve, is located at the bottom of the filter cylinder 111 near the inlet pipe 117. The second drain pipe 120 penetrates all filter cylinders 111 and extends to the bottommost filter cylinder. On the outside of the filter cartridge 111, the output end of the first drain pipe 118 is connected to the sewage pipe. A shock-absorbing ring 121 is connected to the inner surface of the filter cartridge 111. A first spring 123 is evenly connected in a ring shape on the side of the isolation ring seat 122 near the shock-absorbing ring 121. A rubber ring 124 is connected to one side of the first spring 123. The surface of the rubber ring 124 is in contact with the inner surface of the filter cartridge 111 and the outer surface of the RO reverse osmosis membrane 115. An iron ring 125 is connected to the side of the rubber ring 124 near the shock-absorbing ring 121 to assist in shock absorption.

[0040] During use, wastewater is forced from the inlet pipe 117 into multiple sealed cylinder covers 112 and filter cylinders 111. Then, the wastewater passes through the RO reverse osmosis membrane 115, causing it to move to the space on the other side of the filter cylinder 111. Finally, it is discharged from the first drain pipe 118 opened by the electrically controlled valve. Meanwhile, clean water passes through the RO reverse osmosis membrane 115 into the porous core rod 114, and then moves from the porous core rod 114 to the clean water pipe 116, and is finally discharged.

[0041] When water enters the membrane, the impact force of the water flow will cause the water-moving ring 213 to move backward, causing the brush of the cleaning strip 214 to press against the water inlet side of the RO reverse osmosis membrane 115 and the second spring 211 to be stretched. At the same time, the water flow effect will cause the water-moving ring 213 to rotate, thereby driving the cleaning strip 214 to rotate and clean the water inlet side of the RO reverse osmosis membrane 115.

[0042] When backwashing is performed, the electric control valve of the first drain pipe 118 is closed, and the electric valve at the backwash inlet pipe 119 and the electric control valve at the second drain pipe 120 are opened, so that the water can flow from the side of the RO reverse osmosis membrane 115 near the clean water pipe 116 back to the side near the inlet pipe 117 to backwash the RO reverse osmosis membrane 115. Finally, the wastewater is discharged from the second drain pipe 120.

[0043] Example 2:

[0044] Refer to the attached diagram in the instruction manual. Figure 4The difference between Embodiment 2 and Embodiment 1 is that: the return water mechanism 3 includes a first return water elbow 310, which is installed at the top of the uppermost filter cylinder 111, connecting the internal spaces of the filter cylinders 111 on both sides of the isolation ring seat 122. A blocking pipe 311 is embedded in the first return water elbow 310, and a water-blocking ring 312 is connected to the inner surface of the blocking pipe 311. A movable ring sleeve 313 is connected to the annular hole of the water-blocking ring 312, and a moving rod 314 is inserted into the hole of the movable ring sleeve 313. A water-blocking plate 315 is connected to the side of the moving rod 314 near the water outlet port of the first return water elbow 310, and the outer diameter of the water-blocking plate 315 is larger than the inner diameter of the annular hole of the water-blocking ring 312. The moving rod 314 is close to the water outlet port of the first return water elbow 310. A blocking ball 316 is connected to one side of the inlet port of the first return water elbow 310, and the outer diameter of the blocking ball 316 is larger than the aperture of the movable ring 313. The surface of the baffle plate 315 is covered with a rubber membrane, and the blocking ball 316 is a rubber component. An auxiliary filter box 317 with an open top is also embedded in the first return water elbow 310, and a box cover 318 is provided at the top of the auxiliary filter box 317, which is detachably fixed to the auxiliary filter box 317. An inclined filter screen plate 319 is connected to the bottom of the box cover 318, and a rubber sleeve 320 is covered on the outer edge of the filter screen plate 319. A hanging rope 321 is connected to the box cover 318 on one side of the filter screen plate 319, and an impact ball 322 is connected to the bottom of the hanging rope 321 for auxiliary impact.

[0045] In use, the electric control valve of the first drain pipe 118 can be closed, and the electric control valve of the first return water elbow 310 can be opened, so that the sewage can pass through the first return water elbow 310, the auxiliary filter box 317, and the blocking pipe 311 and flow back into the filter cylinder 111 near the side of the inlet pipe 117. At the same time, the impact of the water flow will cause the blocking ball 316 to stick to the movable ring 313, so that the water flow passes through the water-blocking ring 312. When the water flows back, the water flow impacts the water-blocking plate 315, which then blocks the holes of the water-blocking ring 312 to prevent the water from flowing back. In addition, when the water passes through the auxiliary filter box 317, it can be simply filtered by the filter screen plate 319.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A three-stage RO treatment device for ammonia nitrogen-containing wastewater, comprising a reverse osmosis filtration unit (1), wherein the reverse osmosis filtration unit (1) includes a support base (110) placed on the ground, characterized in that: The support base (110) is connected to a filter cylinder (111), and the end of the filter cylinder (111) is fixed with a sealing cylinder cover (112) by bolts. The number of filter cylinders (111) is at least two, and they are evenly distributed vertically. One side of each sealing cylinder cover (112) is connected to a water inlet pipe (117), and the water inlet port of the water inlet pipe (117) is connected to the sewage inlet pipe for centralized sewage input. One side of each filter cylinder (111) is embedded with a clean water pipe (116), and the water outlet port of the clean water pipe (116) is connected to the clean water pipe for centralized clean water output. The filter cylinder (111) contains a support core rod (113), a porous core rod (114), and an RO reverse osmosis membrane (113). 15), and the support core rod (113) is located on the inlet side of the RO reverse osmosis membrane (115), and the porous core rod (114) is located on the outlet side of the RO reverse osmosis membrane (115). The support core rod (113) and the porous core rod (114) are an integral component, and the RO reverse osmosis membrane (115) covers the outside of the support core rod (113) and the porous core rod (114). When the support core rod (113), the porous core rod (114) and the RO reverse osmosis membrane (115) are placed in a suitable position in the filter cartridge (111), the port of the porous core rod (114) is inserted into the water purification pipe (116) for sealing and positioning. An isolation ring seat (122) is sleeved on the outside of the RO reverse osmosis membrane (115), and the isolation ring seat (122) The outer surface of the filter cylinder (111) is closely fitted to the inner surface of the filter cylinder (111) to separate the space on both sides of the filter cylinder (111). The bottom end of the filter cylinder (111) near the water purification pipe (116) is provided with a first sewage pipe (118) controlled by an electric control valve. The first sewage pipe (118) passes through all the filter cylinders (111) and extends to the outside of the bottommost filter cylinder (111). The output end of the first sewage pipe (118) is connected to the sewage pipe. The cleaning mechanism (2) is set on the support core rod (113) on the water inlet side of the filter cylinder (111). The cleaning mechanism (2) includes a fixed ring seat (210). The fixed ring seat (210) is sleeved on the support core rod (113). A second spring (211) is connected to one side of (210), and a mounting ring seat (212) is connected to one side of the second spring (211). A water-moving ring (213) is movably sleeved on one side of the mounting ring seat (212) through a bearing. The water-receiving layer of the water-moving ring (213) faces the water inlet side and is used to rotate in response to water flow. A cleaning strip (214) is connected to the side of the water-moving ring (213) near the water inlet port of the RO reverse osmosis membrane (115). The cleaning strip (214) is evenly distributed in a ring shape along the midpoint of the water-moving ring (213). Brush bristles are connected to the side of the cleaning strip (214) near the water inlet port of the RO reverse osmosis membrane (115). A water return mechanism (3) is set at the top of the support base (110).The filter cartridge (111) has a backwash inlet pipe (119) controlled by an electric valve at its top end near the water purification pipe (116). The backwash inlet pipe (119) passes through all the filter cartridges (111) and extends to the outside of the topmost filter cartridge (111). The input end of the backwash inlet pipe (119) is connected to the backwash water pipe. The filter cartridge (111) has a second sewage pipe (120) controlled by an electric valve at its bottom end near the water inlet pipe (117). The second sewage pipe (120) passes through all the filter cartridges (111) and extends to the outside of the bottommost filter cartridge (111). The output end of the first sewage pipe (118) is connected to the sewage pipe. The filter cartridge (111) is connected to an impact-resistant ring plate (121) on its inner surface. A first spring (123) is uniformly connected in a ring shape along one side of the isolation ring seat (122) near the impact-resistant ring plate (121). A rubber ring (124) is connected to one side of the first spring (123). The surface of the rubber ring (124) is in contact with the inner surface of the filter cartridge (111) and the outer surface of the RO reverse osmosis membrane (115). The return water mechanism (3) includes a first return water elbow (310), which is installed at the top of the filter cartridge (111) and connects the filter cartridges (111) on both sides of the isolation ring seat (122). The two parts are connected. A blocking pipe (311) is embedded in the first return water elbow (310). A water-blocking ring (312) is connected to the inner surface of the blocking pipe (311), and a movable ring sleeve (313) is connected to the annular hole of the water-blocking ring (312). A moving rod (314) is inserted into the hole of the movable ring sleeve (313). A water-blocking plate (315) is connected to the side of the moving rod (314) near the water outlet of the first return water elbow (310), and the outer diameter of the water-blocking plate (315) is larger than the inner diameter of the annular hole of the water-blocking ring (312). A blocking ball is connected to the side of the moving rod (314) near the water inlet of the first return water elbow (310). (316), and the outer diameter of the blocking ball (316) is larger than the aperture of the movable ring (313); the first return water elbow (310) is also fitted with an auxiliary filter box (317) with an open top, and the top of the auxiliary filter box (317) is provided with a box cover (318) which is detachably fixed to the auxiliary filter box (317). The bottom end of the box cover (318) is connected to an inclined filter screen plate (319), and the outer edge of the filter screen plate (319) is covered with a rubber sleeve (320); a hanging rope (321) is connected to the box cover (318) on one side of the filter screen plate (319), and the bottom end of the hanging rope (321) is connected to an impact ball (322) for auxiliary impact.

2. The apparatus according to claim 1, characterized in that: The rubber ring (124) is connected to an iron ring (125) on the side near the impact ring (121) to assist in impact.

3. The apparatus according to claim 1, characterized in that: The surface of the water baffle (315) is covered with a rubber membrane, and the blocking ball (316) is a rubber component.

4. The apparatus according to claim 1, characterized in that: The outer edge of the filter plate (319) is covered with a rubber sleeve (320).

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