A magnetic coagulation sewage treatment system and its treatment method

Abstract

The present invention discloses a magnetic coagulation sewage treatment system and a treatment method thereof, relating to the technical field of sewage treatment. It includes a magnetic coagulation sedimentation tank. One side of the magnetic coagulation sedimentation tank is connected to an ultraviolet disinfection tank, and the other side of the magnetic coagulation sedimentation tank is connected to a modified A2 / O tank. The side end of the modified A2 / O tank is connected to a regulating tank, the side end of the regulating tank is connected to a vortex grit chamber, and the side end of the vortex grit chamber is sequentially connected to a coarse grid inlet tank and a fine grid filtration tank. The fine grid filtration tank is connected to the vortex grit chambers and the coarse grid inlet tank located on both sides. The magnetic coagulation sedimentation tank is divided into a sludge coagulation tank and a sludge sedimentation tank. Adding a magnetic coagulation sedimentation tank to the water treatment system can further remove contaminants in the water, improve the quality of the water, reduce the treatment pressure of the modified A2 / O tank, make the operation of water treatment more stable, and can increase the treatment speed of sewage, thereby increasing the output.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a magnetic coagulation sewage treatment system and a treatment method thereof. Background Art

[0002] In existing urban sewage treatment plants, with the continuous development and progress of industrial parks, the output of industrial wastewater in the parks is increasing day by day. It often directly or only after pretreatment is discharged into the urban sewage treatment plant for treatment. Therefore, the proportion of industrial wastewater concentrated in the urban sewage treatment plant is increasing day by day, resulting in complex sewage composition. Due to its removal of pollutants such as SS and TP, the magnetic coagulation sedimentation tank has many advantages such as high sedimentation efficiency, stable effluent performance, and small floor area, and is preferably used in the sewage upgrading and renovation project.

[0003] In the existing sewage treatment process, the water liquid is mostly precipitated and filtered by an improved A2 / O tank. The reaction tank of the A2 / O process has a large volume, and the floor area and construction cost may be high. The sludge return flow is large, and a large sludge return system is required, resulting in low sewage purification efficiency per unit area. Moreover, the preparation cost of the magnetic coagulant of the existing magnetic coagulation sewage treatment device is relatively high; for suspended matter with small particles and low density, the magnetic coagulation effect is poor; when treating large-scale wastewater, a large amount of magnetic coagulant and energy need to be invested. Therefore, the present application designs a magnetic coagulation sewage treatment system and a treatment method thereof to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art, and to propose a magnetic coagulation sewage treatment system and a treatment method thereof.

[0005] To achieve the above purpose, the present invention adopts the following technical solution: A magnetic coagulation sewage treatment system includes a magnetic coagulation sedimentation tank. One side of the magnetic coagulation sedimentation tank is communicated with an ultraviolet disinfection tank, and the other side of the magnetic coagulation sedimentation tank is communicated with an improved A2 / O tank. The side end of the improved A2 / O tank is communicated with an adjustment tank, and the side end of the adjustment tank is communicated with a vortex grit chamber. The side end of the vortex grit chamber is sequentially communicated with a coarse grid inlet tank and a fine grid filter tank. The fine grid filter tank is communicated with the vortex grit chambers and the coarse grid inlet tank on both sides. The magnetic coagulation sedimentation tank is divided into a sludge coagulation tank and a sludge sedimentation tank. The sludge coagulation tank is divided into a first chamber, a second chamber and a third chamber. The first chamber and the second chamber are separated at the lower end by a first lower partition plate, the second chamber and the third chamber are separated at the upper end by a first upper partition plate, the third chamber and the sludge sedimentation tank are separated at the lower end by a second lower partition plate. A second upper partition plate is provided at the side end of the second lower partition plate in the sludge sedimentation tank. A water purification filtering mechanism is horizontally provided in the sludge sedimentation tank, and a silt cleaning mechanism is vertically provided through the water purification filtering mechanism in the middle of the sludge sedimentation tank.

[0006] Preferably, the dredging mechanism includes a fourth support frame in the sludge sedimentation tank. A connecting rotating rod vertically penetrates through the fourth support frame, and a fourth motor for driving the connecting rotating rod to rotate is arranged on the fourth support frame. The bottom end of the connecting rotating rod is fixedly connected with a dredging scraper. A silt collection seat for cooperating with the dredging scraper to sweep and scrape is arranged at the inner bottom of the sludge sedimentation tank. The top surface of the silt collection seat is a concave arc surface structure that fits the rotating dredging scraper. A silt collection hole is vertically opened in the middle of the silt collection seat, and a magnetic separation system is arranged inside the silt collection seat.

[0007] Preferably, the end of the silt collection hole is communicated with a silt discharge pipe. The other side of the silt discharge pipe is connected with a transfer pump. A magnetic separator is arranged at the side end of the transfer pump. The magnetic separator is fixedly installed on the fourth support frame. The magnetic powder discharge port of the magnetic separator is connected with a three-chamber dosing device through a pipeline. The magnetic powder inlet of the three-chamber dosing device is communicated with the magnetic powder discharge port of the magnetic separator. The three-chamber dosing device is fixedly installed at the upper end of the intersection of the first chamber, the second chamber and the third chamber. The three-chamber dosing device is provided with a PAC dosing pipe in the first chamber, a magnetic powder dosing pipe in the second chamber, and a PAM dosing pipe in the third chamber.

[0008] Preferably, a sewage inlet pipe communicating with the first chamber is arranged on one side of the magnetic coagulation sedimentation tank, and a water outlet pipe communicating with the sludge sedimentation tank is arranged on the other side of the magnetic coagulation sedimentation tank. A first support frame is arranged at the upper end of the first chamber. A first stirring rod vertically penetrates through the first support frame, and a first motor for driving the first stirring rod to rotate is installed at the upper end of the first support frame. A second support frame is arranged at the upper end of the second chamber. A second stirring rod vertically penetrates through the second support frame, and a second motor for driving the second stirring rod to rotate is installed at the upper end of the second support frame. A third support frame is arranged at the upper end of the third chamber. A third stirring rod vertically penetrates through the third support frame, and a third motor for driving the third stirring rod to rotate is installed at the upper end of the third support frame.

[0009] Preferably, a magnetic powder feeding hopper is sleeved on the second stirring rod. The lower end of the magnetic powder dosing pipe extends into the magnetic powder feeding hopper. Several powder spraying holes are equidistantly arranged at the bottom end of the magnetic powder feeding hopper. Several aeration pipes are vertically inserted at the inner walls of the second chamber and the third chamber. Several aeration holes are equidistantly arranged at the lower ends of the aeration pipes.

[0010] Preferably, the water purification and filtration mechanism is composed of inclined tube packing and a filtration component. The inclined tube packing is fixedly installed at the lower end of the filtration component. The filtration component is composed of a first water collection box, a second water collection box, and multiple water collection plates. The multiple water collection plates are connected between the first water collection box and the second water collection box at equal intervals. Water inlet grooves for communicating with the water collection plates are equidistantly arranged on the side wall of the first water collection box. Communication grooves for communicating with the water collection plates are equidistantly arranged on the side wall of the second water collection box. A water outlet hole for communicating with the water outlet pipe is arranged on the other side wall of the first water collection box. Several water filtration boxes are equidistantly installed on the second water collection box. Movable filter plates are slidably installed on both sides of the multiple water collection plates. The movable filter plates are of a hollow floating plate structure.

[0011] Preferably, two connecting blocks are symmetrically convexly provided on one side of the movable filter plate. Springs are fixedly connected to the two connecting blocks. Mounting threaded rods are respectively inserted through the middle parts of the springs. The upper ends of the mounting threaded rods are threadedly connected with fixing nuts. The fixing nuts are fixed at the top of the water collection plate. The mounting threaded rods are inserted and installed in the water collection plate.

[0012] Preferably, several water collection grooves are equidistantly arranged on the water collection plate. An abutting groove is arranged at the side end of the water collection plate. A rubber dial plate for fitting and abutting against the abutting groove is convexly provided at the side end of the movable filter plate. Several rubber blocking strips are equidistantly arranged in the middle of the abutting groove.

[0013] Preferably, a filtering boss is convexly provided in the middle of the bottom end of the water filtration box. Two filtering collection grooves are symmetrically opened on both sides of the filtering boss. Round chamfers are respectively arranged at both ends of the filtering boss. Fine filtering holes are equidistantly arranged on the filtering boss and at the bottom of the two filtering collection grooves.

[0014] The present invention also proposes a magnetic coagulation sewage treatment system and its treatment method, which is characterized by including the following steps:

[0015] S1. First, power is connected to each motor of the device and the device. The sludge delivery pipeline is connected to the sludge outlet of the magnetic separator. The air supply pipe is connected to the air delivery device. PAC, magnetic powder, and PAM are added to the three-chamber chemical dosing device. Then the device is started, so that the sewage first enters the coarse grid inlet pool and the large debris is removed from the water through the coarse grid filtering device. Subsequently, the sewage is sent into the fine grid filtering pool by the pump and the small debris is removed from the water through the fine grid filtering device. Subsequently, the sewage is sent into the cyclone grit chamber by the pump to separate the dirt and enters the regulation pool. The sewage in the regulation pool is sent into the improved A2 / O pool by the pump for purification, and then enters the magnetic coagulation sedimentation tank;

[0016] S2. Sewage is introduced into the first chamber through the sewage inlet pipe. Under the action of PAC sprinkled in the first chamber and the first stirring rod, tiny particles coagulate into larger particles, and then enter the second chamber through the upper end of the first lower partition board. Under the action of magnetic powder sprinkled in the second chamber and the second stirring rod, pollutants further combine with each other to form magnetic flocs that are easy to precipitate or separate. Then, they enter the third chamber through the lower end of the first upper partition board, and under the action of PAM and the third stirring rod, larger magnetic flocs are formed and enter the sludge sedimentation tank through the upper end of the second lower partition board and the lower end of the second upper partition board. The setting of the magnetic powder hopper can drive the magnetic powder hopper to rotate when the second stirring rod rotates, so that the magnetic powder in the magnetic powder hopper can be evenly sprinkled through the powder spraying holes, thereby increasing the mixing speed of the magnetic powder and enhancing the action time of the magnetic powder, facilitating the reaction of the magnetic powder with the dirt to generate magnetic flocs and aggregating together. Through the setting of the aeration pipe, the stirring rate in the second chamber and the third chamber can be increased, and dirt attachment to the corners of the chambers can be prevented. At the same time, the stirring device can be aerated and cleaned to maintain the stable operation of the stirring device;

[0017] S3. Then, the sewage with larger magnetic flocs precipitates in the sludge sedimentation tank, and the sediment precipitates onto the top surface of the silt collection seat. Then, under the action of the magnetic separation system, when the water flow containing magnetic flocs passes through this area, due to the action of the magnetic field, the magnetic flocs are quickly adsorbed and aggregated into larger particles, thereby shortening the precipitation time required for subsequent separation. Then, the connecting rotating rod drives the sludge scraping plate to scrape on the silt collection seat, so that the magnetic flocs enter the silt collection holes to achieve solid-liquid separation;

[0018] S4. Then, the transfer pump on the side of the magnetic separator sends the magnetic flocs into the magnetic separator for separation. The magnetic separator separates the magnetic flocs into dirt and magnetic powder, and sends the magnetic powder into the three-chamber dosing device through the pipeline for reuse. The water layer in the sludge sedimentation tank submerges through the inclined tube filler, and the fine flocs precipitate in the inclined tube filler and precipitate to the bottom of the sludge sedimentation tank on the inclined path. Subsequently, the water layer continues to submerge upward and passes through the movable filter plate, and converges through the water collection tank and flows into the water collection plate. Part of the water liquid passes through the secondary filtration of the water filter box and flows into the water collection plate through the second water collection box. The water liquid on the water collection plate flows to the first water collection box and flows into the outlet pipe through the outlet hole and into the ultraviolet disinfection tank. After ultraviolet disinfection in the ultraviolet disinfection tank, the water liquid treatment is completed;

[0019] S5. Finally, under the state of water fluctuation, the movable filter plate of the hollow floating plate structure will cooperate with the spring, thereby driving the movable filter plate to swing up and down so that the holes of the movable filter plate are not easily blocked. When some holes are blocked, the filtered liquid level will rise, and the rising liquid level will increase the buoyancy of the movable filter plate. When the buoyancy exceeds a certain level, the rubber paddle will break through the obstruction of the rubber baffle, so that the movable filter plate floats up quickly. The floating movable filter plate cooperates with the spring to quickly allow water to enter and drain the cavity at the upper end of the abutment groove, thereby impacting the blocked holes to remove the blocked dirt. After the holes are through, the filtered water level drops and the buoyancy of the movable filter plate is reduced, so that the spring pushes the movable filter plate back to its original position and continues to float up and down to prevent the holes from being blocked, so that the movable filter plate has the ability to automatically prevent blockage and discharge sewage. The operation of the device ends here.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: in the present invention, through the hanging and sweeping cooperation between the silt collecting seat and the silt cleaning scraper, it is convenient to send the magnetic flocs precipitated on the silt collecting seat into the silt collecting hole, thereby improving the effect of dirt separation, thereby realizing the function of rapid dirt precipitation, and through the energy storage cooperation between the rubber paddle and the spring, it is convenient to utilize the accumulated elastic potential energy, thereby extending the working life of the movable filter plate and reducing the maintenance time, thereby realizing the function of shaking and preventing the movable filter plate from blocking, and then through the cooperation of the inclined tube filler and the purified water of the filter assembly, it is convenient to remove the tiny flocs remaining in the sedimentation filtration, thereby realizing the function of removing the tiny flocs in the water and improving the water quality, and finally solving the problem of low water treatment efficiency of the improved A2 / 0 pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the process of the present invention;

[0023] Figure 2 This is a schematic diagram of the magnetic coagulation sedimentation tank structure from the first perspective of the present invention;

[0024] Figure 3 It is a schematic diagram of the magnetic coagulation sedimentation tank structure from a second viewing angle of the present invention;

[0025] Figure 4 It is a schematic diagram of the positional relationship structure of the internal components of the magnetic coagulation sedimentation tank of the present invention from a first viewing angle;

[0026] Figure 5 It is a schematic diagram of the positional relationship structure of the internal components of the magnetic coagulation sedimentation tank of the present invention from a second viewing angle;

[0027] Figure 6Schematic three-dimensional structure diagram of the positional relationship between the water purification and filtration mechanism and the inclined tube packing of the present invention;

[0028] Figure 7 First perspective schematic diagram of the water purification and filtration mechanism of the present invention;

[0029] Figure 8 Second perspective schematic diagram of the water purification and filtration mechanism of the present invention;

[0030] Figure 9 Schematic three-dimensional structure diagram of the positional relationship between the internal parts of the water collection plate of the present invention;

[0031] Figure 10 Schematic three-dimensional structure diagram of the positional relationship between the movable filter plate and the spring structure of the present invention;

[0032] Figure 11 Schematic three-dimensional structure diagram of the water filter box of the present invention.

[0033] Reference numerals in the figure: 1, coarse grid inlet tank; 2, fine grid filtration tank; 3, swirl grit chamber; 4, regulating tank; 5, improved A2 / O tank; 6, magnetic coagulation sedimentation tank; 7, ultraviolet disinfection tank; 8, magnetic separator; 9, three-chamber chemical dosing device; 10, sewage inlet pipe; 11, first stirring rod; 12, second stirring rod; 13, sludge discharge pipe; 14, third stirring rod; 15, outlet pipe; 16, silt collection seat; 17, silt cleaning scraper; 18, connecting rotating rod; 19, aeration pipe; 20, first chamber; 21, second chamber; 22, third chamber; 23, magnetic powder feeding hopper; 24, sludge sedimentation tank; 25, inclined tube packing; 26, first water collection box; 27, second water collection box; 28, water filter box; 29, water inlet trough; 30, water collection plate; 31, movable filter plate; 32, fixing nut; 33, communication groove; 34, water outlet hole; 35, water collection trough; 36, rubber retaining strip; 37, rubber deflector; 38, connecting block; 39, spring; 40, installation threaded rod; 41, filtering boss; 42, round chamfer; 43, filtering collection trough. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0035] Example 1: Refer to Figures 1 to 11, a magnetic coagulation sewage treatment system, including a magnetic coagulation sedimentation tank 6. One side of the magnetic coagulation sedimentation tank 6 is connected to an ultraviolet disinfection tank 7, and the other side of the magnetic coagulation sedimentation tank 6 is connected to a modified A2 / O tank 5. The side end of the modified A2 / O tank 5 is connected to an adjustment tank 4, the side end of the adjustment tank 4 is connected to a vortex grit chamber 3, and the side end of the vortex grit chamber 3 is sequentially connected to a coarse grid inlet tank 1 and a fine grid filtration tank 2. The fine grid filtration tank 2 is connected to the vortex grit chamber 3 and the coarse grid inlet tank 1 on both sides. The magnetic coagulation sedimentation tank 6 is divided into a sludge coagulation tank and a sludge sedimentation tank 24. The sludge coagulation tank is divided into a first chamber 20, a second chamber 21, and a third chamber 22. The first chamber 20 and the second chamber 21 are separated at the lower end by a first lower partition plate, the second chamber 21 and the third chamber 22 are separated at the upper end by a first upper partition plate, the third chamber 22 and the sludge sedimentation tank 24 are separated at the lower end by a second lower partition plate. A second upper partition plate is provided at the side end of the second lower partition plate in the sludge sedimentation tank 24. A water purification filtration mechanism is horizontally provided in the sludge sedimentation tank 24, and a silt cleaning mechanism vertically passes through the water purification filtration mechanism in the middle of the sludge sedimentation tank 24. By adding the magnetic coagulation sedimentation tank 6 to the water treatment system, it is possible to further remove the contaminants in the water, improve the quality of the water, reduce the treatment pressure of the modified A2 / O tank 5, make the operation of water treatment more stable, and improve the treatment speed of sewage, thereby increasing the output; the silt cleaning mechanism includes a fourth support frame in the sludge sedimentation tank 24, a connecting rotating rod 18 vertically penetrates through the fourth support frame, and a fourth motor on the fourth support frame for driving the connecting rotating rod 18 to rotate. The bottom end of the connecting rotating rod 18 is fixedly connected with a silt cleaning scraper 17. A silt collection seat 16 for cooperating with the silt cleaning scraper 17 to sweep is provided at the inner bottom of the sludge sedimentation tank 24. The top surface of the silt collection seat 16 is an arcuate concave surface structure that fits the rotating silt cleaning scraper 17. A silt collection hole is vertically opened in the middle of the silt collection seat 16. A magnetic separation system is provided inside the silt collection seat 16. Through the setting of the magnetic separation system, when the water flow containing magnetic flocs passes through this area, due to the action of the magnetic field, the magnetic flocs are quickly adsorbed and aggregated into larger particles, thereby shortening the time required for sedimentation and facilitating subsequent separation. Through the setting of the silt collection seat 16 and the silt cleaning scraper 17, it is possible to better send the silt into the silt collection hole, thereby performing subsequent magnetic powder separation and retraction operations;The end of the silt accumulation hole is connected with a silt discharge pipe 13. The other side of the silt discharge pipe 13 is connected with a transfer pump. A magnetic separator 8 is provided at the side end of the transfer pump. The magnetic separator 8 is fixedly installed on the fourth support frame. The magnetic powder discharge port of the magnetic separator 8 is connected with a three-chamber chemical dosing device 9 through a pipeline. The magnetic powder inlet of the three-chamber chemical dosing device 9 is communicated with the magnetic powder discharge port of the magnetic separator 8. The three-chamber chemical dosing device 9 is fixedly installed at the upper end of the intersection of the first chamber 20, the second chamber 21 and the third chamber 22. The three-chamber chemical dosing device 9 is provided with a PAC dosing pipe in the first chamber 20, a magnetic powder dosing pipe in the second chamber 21, and a PAM dosing pipe in the third chamber 22. Through the setting of the magnetic separator 8, the magnetic powder in the magnetic flocs can be separated from the dirt, and through the cooperative action of the three-chamber chemical dosing device 9, the magnetic powder can be recycled and reused, and medicines can be better added to the three chambers.;

[0036] Embodiment 2: It is basically the same as the technical solution of Embodiment 1, except that, as Figures 5 to 7As shown in the figure, a sewage inlet pipe 10 communicating with the first chamber 20 is provided on one side of the magnetic coagulation sedimentation tank 6, and a water outlet pipe 15 communicating with the sludge sedimentation tank 24 is provided on the other side of the magnetic coagulation sedimentation tank 6. A first support frame is provided at the upper end of the first chamber 20. A first stirring rod 11 is vertically inserted through the first support frame. A first motor for driving the first stirring rod 11 to rotate is installed at the upper end of the first support frame. A second support frame is provided at the upper end of the second chamber 21. A second stirring rod 12 is vertically inserted through the second support frame. A second motor for driving the second stirring rod 12 to rotate is installed at the upper end of the second support frame. A third support frame is provided at the upper end of the third chamber 22. A third stirring rod 14 is vertically inserted through the third support frame. A third motor for driving the third stirring rod 14 to rotate is installed at the upper end of the third support frame. Through the stirring and mixing of the three chambers, it is convenient for the added medicine to act on the dirt in the water, so that the dirt continuously forms larger magnetic flocs, which is convenient for subsequent sedimentation and separation. A magnetic powder feeding hopper 23 is sleeved on the second stirring rod 12. The lower end of the magnetic powder feeding pipe extends into the magnetic powder feeding hopper 23. A plurality of powder spreading holes are equidistantly arranged at the bottom end of the magnetic powder feeding hopper 23. Several aeration pipes 19 are vertically inserted into the inner walls of the second chamber 21 and the third chamber 22. A plurality of aeration holes are equidistantly arranged at the lower ends of the aeration pipes 19. Through the setting of the magnetic powder feeding hopper 23, the magnetic powder feeding hopper 23 can be driven to rotate when the second stirring rod 12 rotates, so that the magnetic powder in the magnetic powder feeding hopper 23 can be evenly sprinkled through the powder spreading holes, thereby improving the mixing speed of the magnetic powder and enhancing the action time of the magnetic powder, facilitating the reaction of the magnetic powder with the dirt to produce magnetic flocs and aggregating together. Through the setting of the aeration pipes 19, the stirring rate in the second chamber 21 and the third chamber 22 can be increased, and the attachment of dirt at the corners of the chambers can be prevented. At the same time, the stirring device can be aerated and cleaned to maintain the stable operation of the stirring device. The water purification and filtration mechanism is composed of inclined tube fillers 25 and a filtration component. The inclined tube fillers 25 are fixedly installed at the lower end of the filtration component. The filtration component is composed of a first water collecting box 26, a second water collecting box 27 and a plurality of water collecting plates 30. The plurality of water collecting plates 30 are equidistantly connected between the first water collecting box 26 and the second water collecting box 27. Water inlet grooves 29 for communicating with the water collecting plates 30 are equidistantly arranged on the side wall of the first water collecting box 26. Communication grooves 33 for communicating with the water collecting plates 30 are equidistantly arranged on the side wall of the second water collecting box 27. A water outlet hole 34 for communicating with the water outlet pipe 15 is arranged on the other side wall of the first water collecting box 26. A plurality of water filtering boxes 28 are equidistantly installed on the second water collecting box 27. Movable filter plates 31 are slidably installed on both sides of the plurality of water collecting plates 30. The movable filter plates 31 are hollow floating plate structures. Through the setting of the inclined tube fillers 25, it is possible to prevent the tiny flocs from floating and being blocked by the inclined tube fillers 25, and precipitate and aggregate on the inclined tube fillers 25, further reducing the content of tiny flocs in the water.

[0037] Embodiment 3: It is basically the same as the technical solution of Embodiment 1, except that, as Figures 7 to 11As shown in the figure, two connecting blocks 38 are symmetrically convexly provided on one side of the movable filter plate 31. A spring 39 is fixedly connected to the two connecting blocks 38. An installation threaded rod 40 is penetrated through the middle of the spring 39. The upper end of the installation threaded rod 40 is threadedly connected with a fixing nut 32. The fixing nut 32 is fixed at the top end of the water collecting plate 30. The installation threaded rod 40 is inserted and installed in the water collecting plate 30. Through the arrangement of the spring 39, it is convenient for the movable filter plate 31 to reciprocate and shake, thereby preventing the filter holes on the movable filter plate 31 from being blocked; several water collecting grooves 35 are equally spaced on the water collecting plate 30. An abutting groove is provided at the side end of the water collecting plate 30. A rubber dial 37 for fitting and abutting against the abutting groove is convexly provided at the side end of the movable filter plate 31. Several rubber retaining strips 36 are equally spaced in the middle of the abutting groove. Through the arrangement of the rubber retaining strips 36 and the rubber dial 37, when some holes are blocked, the filtered liquid level will rise, and the increased liquid level will cause the buoyancy received by the movable filter plate 31 to increase. When the buoyancy exceeds a certain level, the rubber dial 37 will break through the block of the rubber retaining strips 36, causing the movable filter plate 31 to quickly float upward. The floating movable filter plate 31 cooperates with the spring 39 to quickly make the cavity above the abutting groove inlet and drain water, thereby impacting the blocked holes to remove the blocked dirt; a filter boss 41 is convexly provided in the middle of the bottom end of the water filtering box 28. Two filter collecting grooves 43 are symmetrically opened on both sides of the filter boss 41. Round chamfers 42 are opened at both ends of the filter boss 41. Fine filtering holes are equally spaced on the filter boss 41 and at the bottom of the two filter collecting grooves 43. Through the arrangement of the filter boss 41, the round chamfers 42 and the filter collecting grooves 43 on the water filtering box 28, it is possible to better perform secondary filtration on some water liquids and flush the collected waste into the filter collecting grooves 43, thereby maintaining the filtration efficiency of the water filtering box 28.

[0038] Working principle: In this embodiment, the present invention also proposes a use method of a magnetic coagulation sewage treatment system, including the following steps:

[0039] Step 1, first, first connect the power supply to each motor of the device and the device, connect the sludge delivery pipeline to the sludge outlet of the magnetic separator 8, connect the air supply pipe 19 to the air supply device, add PAC, magnetic powder and PAM to the three-chamber dosing device 9, and then start the device, so that the sewage first enters the coarse grid inlet tank 1 and the large sundries are removed from the water through the coarse grid filtering device. Subsequently, the sewage is sent by the pump into the fine grid filtering tank 2 and the small sundries are removed from the water through the fine grid filtering device. Subsequently, the sewage is sent by the pump into the cyclone grit chamber 3 to separate the dirt and enter the regulating tank 4. The sewage in the regulating tank 4 is sent by the pump into the improved A2 / O tank 5 for purification, and then enters the magnetic coagulation sedimentation tank 6;

[0040] Step 2: The sewage is introduced into the first chamber 20 through the sewage inlet pipe 10. Under the action of the PAC sprinkled in the first chamber 20 and the first stirring rod 11, the fine particles aggregate into larger particles, and then enter the second chamber 21 through the upper end of the first lower partition. Under the action of the magnetic powder sprinkled in the second chamber 21 and the second stirring rod 12, the pollutants further combine with each other to form magnetic flocs that are easy to precipitate or separate. Then, they enter the third chamber 22 through the lower end of the first upper partition, and form larger magnetic flocs under the action of PAM and the third stirring rod 14, and enter the sludge sedimentation tank 24 through the upper end of the second lower partition and the lower end of the second upper partition. The setting of the magnetic powder hopper 23 can drive the magnetic powder hopper 23 to rotate when the second stirring rod 12 rotates, so that the magnetic powder in the magnetic powder hopper 23 can be evenly sprinkled through the powder spreading holes, thereby increasing the mixing speed of the magnetic powder and enhancing the action time of the magnetic powder, facilitating the reaction between the magnetic powder and the dirt to produce magnetic flocs, and aggregating together. Through the setting of the aeration pipe 19, the stirring rate in the second chamber 21 and the third chamber 22 can be increased, and the attachment of dirt to the corners of the chambers can be prevented. At the same time, the stirring device can be aerated and cleaned to maintain the stable operation of the stirring device;

[0041] Step 3: Then, the sewage with larger magnetic flocs precipitates in the sludge sedimentation tank 24, and the precipitate settles on the top surface of the silt collection seat 16. Then, under the action of the magnetic separation system, when the water flow containing magnetic flocs passes through this area, due to the action of the magnetic field, the magnetic flocs are quickly adsorbed and aggregated into larger particles, thereby shortening the precipitation time required for subsequent separation. Then, the connecting rotating rod 18 drives the sludge scraping plate 17 to sweep on the silt collection seat 16, so that the magnetic flocs enter the silt collection holes to achieve solid-liquid separation;

[0042] Step 4: Then, the transfer pump on the side of the magnetic separator 8 sends the magnetic flocs into the magnetic separator 8 for separation. The magnetic separator 8 separates the magnetic flocs into dirt and magnetic powder, and sends the magnetic powder into the three-chamber dosing device 9 through a pipeline for reuse. The water layer in the sludge sedimentation tank 24 submerges through the inclined tube filler 25, and the fine flocs precipitate in the inclined tube filler 25 and precipitate to the bottom of the sludge sedimentation tank 24 on the inclined path. Subsequently, the water layer continues to submerge upward and passes through the movable filter plate 31, and converges through the water collecting tank 35 and flows into the water collecting plate 30. Part of the water liquid passes through the secondary filtration of the water filtering box 28 and flows into the water collecting plate 30 through the second water collecting box 27. The water liquid on the water collecting plate 30 flows to the first water collecting box 26 and flows into the ultraviolet disinfection tank 7 through the water outlet hole 34. After the ultraviolet disinfection in the ultraviolet disinfection tank 7, the water liquid treatment is completed. Through the setting of the filtering boss 41, the round chamfer 42 and the filtering collection tank 43 on the water filtering box 28, the secondary filtration of part of the water liquid can be better carried out, and the collected waste is flushed into the filtering collection tank 43, thereby maintaining the filtering efficiency of the water filtering box 28;

[0043] Step 5. When the water fluctuates, the movable filter plate 31 of the hollow floating plate structure will cooperate with the spring 39, thereby driving the movable filter plate 31 to swing up and down, making it difficult for the holes of the movable filter plate 31 to be blocked. When some holes are blocked, the filtered liquid level will rise, and the rising liquid level will increase the buoyancy of the movable filter plate 31. When the buoyancy exceeds a certain level, the rubber paddle 37 will break through the obstruction of the rubber baffle 36, allowing the movable filter plate 31 to float quickly. The floating movable filter plate 31 cooperates with the spring 39 to quickly allow water to enter and drain the cavity at the upper end of the abutment groove, thereby impacting the blocked holes to remove the blocked dirt. After the through-hole is passed, the filtered water level drops and the buoyancy of the movable filter plate 31 is reduced, so that the spring 39 pushes the movable filter plate 31 back to its original position and continues to float up and down to prevent the holes from being blocked, so that the movable filter plate 31 has the ability to automatically prevent blockage and discharge sewage. The operation of the device is now completed.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A magnetic coagulation sewage treatment system, comprising a magnetic coagulation sedimentation tank, characterized in that: One side of the magnetic coagulation sedimentation tank is connected to an ultraviolet disinfection tank, the other side of the magnetic coagulation sedimentation tank is connected to an improved A2 / 0 tank, the side end of the improved A2 / 0 tank is connected to a regulating tank, the side end of the regulating tank is connected to a cyclone sand settling tank, the side end of the cyclone sand settling tank is connected to a coarse grid water inlet tank and a fine grid filter tank in sequence, the fine grid filter tank is connected to the cyclone sand settling tank and the coarse grid water inlet tank on both sides, the magnetic coagulation sedimentation tank is divided into a sludge coagulation tank and a sludge sedimentation tank, the The sludge coagulation tank is divided into a first chamber, a second chamber and a third chamber. The first chamber and the second chamber are separated at the lower end by a first lower partition plate, the second chamber and the third chamber are separated at the upper end by a first upper partition plate, and the third chamber and the sludge sedimentation tank are separated at the lower end by a second lower partition plate. A second upper partition plate is provided at the side end of the second lower partition plate in the sludge sedimentation tank. A water purification filter mechanism is horizontally provided in the sludge sedimentation tank, and a dredging mechanism is provided vertically through the water purification filter mechanism in the middle of the sludge sedimentation tank. The dredging mechanism comprises a fourth support frame in the sludge sedimentation tank, a connecting rotating rod vertically penetrated on the fourth support frame, and a fourth motor on the fourth support frame for driving the connecting rotating rod to rotate, a dredging scraper is fixedly connected to the bottom end of the connecting rotating rod, a dredging seat for cooperating with the dredging scraper to sweep is provided at the inner bottom of the sludge sedimentation tank, the top surface of the dredging seat is a concave arc structure that fits the rotating dredging scraper, a dredging hole is vertically opened in the middle of the dredging seat, and a magnetic separation system is provided inside the dredging seat; The water purification filter mechanism is composed of an oblique tube filler and a filter assembly, wherein the oblique tube filler is fixedly installed at the lower end of the filter assembly, and the filter assembly is composed of a first water collecting box, a second water collecting box and a plurality of water collecting plates, wherein the plurality of water collecting plates are equidistantly connected between the first water collecting box and the second water collecting box, and movable filter plates are slidably installed on both sides of the plurality of water collecting plates; Two connecting blocks are symmetrically protruded on one side of the movable filter plate, springs are fixedly connected to the two connecting blocks, and a mounting threaded rod is passed through the middle of each spring, and a fixing nut is threadedly connected to the upper end of the mounting threaded rod, and the fixing nut is fixed to the top of the water collecting plate, and the mounting threaded rod is inserted and installed in the water collecting plate; The water collecting plate is provided with a plurality of water collecting grooves at equal intervals, abutment grooves are provided at the side ends of the water collecting plate, a rubber shifting plate for fitting into the abutment grooves is convexly provided at the side ends of the movable filter plate, and a plurality of rubber baffles are provided at equal intervals in the middle of the abutment grooves.

2. A magnetic coagulation sewage treatment system according to claim 1, characterized in that: The end of the silt collecting hole is connected with a silt discharge pipe, and the other side of the silt discharge pipe is connected with a transmission pump. A magnetic separator is provided at the side end of the transmission pump, and the magnetic separator is installed and fixed on the fourth support frame. The magnetic powder discharge port of the magnetic separator is connected with a three-chamber dosing device through a pipeline, and the magnetic powder feed port of the three-chamber dosing device is connected with the magnetic powder discharge port of the magnetic separator. The three-chamber dosing device is fixedly installed at the upper end where the first chamber, the second chamber and the third chamber meet. The three-chamber dosing device is provided with a PAC dosing pipe in the first chamber, a magnetic powder dosing pipe in the second chamber, and a PAM dosing pipe in the third chamber.

3. A magnetic coagulation sewage treatment system according to claim 2, characterized in that: One side of the magnetic coagulation sedimentation tank is provided with a sewage inlet pipe connected to the first chamber, and the other side of the magnetic coagulation sedimentation tank is provided with a water outlet pipe connected to the sludge sedimentation tank, the upper end of the first chamber is provided with a first support frame, a first stirring rod is vertically passed through the first support frame, and a first motor for driving the first stirring rod to rotate is installed on the upper end of the first support frame, the upper end of the second chamber is provided with a second support frame, a second stirring rod is vertically passed through the second support frame, and a second motor for driving the second stirring rod to rotate is installed on the upper end of the second support frame, the upper end of the third chamber is provided with a third support frame, a third stirring rod is vertically passed through the third support frame, and a third motor for driving the third stirring rod to rotate is installed on the upper end of the third support frame.

4. A magnetic coagulation sewage treatment system according to claim 3, characterized in that: A magnetic powder feeding hopper is sleeved on the second stirring rod, the lower end of the magnetic powder feeding tube extends into the magnetic powder feeding hopper, and a plurality of powder sprinkling holes are equidistantly provided at the bottom end of the magnetic powder feeding hopper, and a plurality of aeration pipes are vertically inserted into the inner walls of the second chamber and the third chamber, and a plurality of aeration holes are equidistantly provided at the lower ends of the aeration pipes.

5. A magnetic coagulation sewage treatment system according to claim 4, characterized in that: The side wall of the first water collecting box is provided with water inlet grooves for connecting to the water collecting plate at equal distances, the side wall of the second water collecting box is provided with connecting grooves for connecting to the water collecting plate at equal distances, the other side wall of the first water collecting box is provided with water outlet holes for connecting to the water outlet pipe, and several water filter boxes are installed at equal distances on the second water collecting box, and the movable filter plate is a hollow floating plate structure.

6. A magnetic coagulation sewage treatment system according to claim 5, characterized in that: A filter boss is protruded from the middle of the bottom end of the water filter box, and two filter collection grooves are symmetrically opened on both sides of the filter boss. Both ends of the filter boss are provided with round chamfers, and fine filter holes are equidistantly opened on the filter boss and the bottoms of the two filter collection grooves.

7. The treatment method of a magnetic coagulation sewage treatment system according to claim 6, characterized in that: The following steps are involved: S1, firstly, the motors and devices of the device are powered on, and the silt delivery pipeline is connected to the mud outlet of the magnetic separator, the aeration pipe is connected to the gas delivery device, PAC, magnetic powder and PAM are added to the three-chamber dosing device, and then the device is started, so that the sewage first enters the coarse grid water inlet pool and the large debris is removed from the water through the coarse grid filter device, and then the sewage is pumped into the fine grid filter pool and the small debris is removed from the water through the fine grid filter device, and then the sewage is pumped into the cyclone sand settling tank by the pump to separate the dirt and enter the regulating tank, and the sewage in the regulating tank is pumped into the improved A2 / 0 tank by the pump for purification, and then enters the magnetic coagulation sedimentation tank; S2, sewage is introduced into the first chamber through the sewage inlet pipe. Under the action of the PAC sprinkled in the first chamber and the first stirring rod, the tiny particles agglomerate into larger particles, and then enter the second chamber through the upper end of the first lower partition. Under the action of the magnetic powder sprinkled in the second chamber and the second stirring rod, the pollutants further combine with each other to form magnetic flocs that are easy to precipitate or separate, and then enter the third chamber through the lower end of the first upper partition. Under the action of PAM and the third stirring rod, larger magnetic flocs are formed, and the upper end of the second lower partition and the second upper partition are separated. The lower end of the magnetic powder feeding hopper is passed into the sludge sedimentation tank. The setting of the magnetic powder feeding hopper can drive the magnetic powder feeding hopper to rotate with the rotation of the second stirring rod, so that the magnetic powder in the magnetic powder feeding hopper can be evenly sprinkled through the powder spreading hole, thereby improving the mixing speed of the magnetic powder and enhancing the action time of the magnetic powder, which is convenient for the magnetic powder to react with the dirt to produce magnetic flocs and aggregate together. Through the setting of the aeration pipe, the stirring rate in the second chamber and the third chamber can be increased, and dirt can be prevented from adhering to the corners of the chamber. At the same time, the stirring device can be aerated and cleaned to maintain the stable operation of the stirring device; S3, then the sewage with larger magnetic flocs is precipitated in the sludge sedimentation tank, and the sediment is precipitated on the top surface of the sludge collecting seat. Then, through the action of the magnetic separation system, when the water containing magnetic flocs flows through this area, due to the action of the magnetic field, the magnetic flocs are quickly adsorbed and aggregated into larger particles, thereby shortening the sedimentation time and facilitating subsequent separation. Then, the rotating rod is connected to drive the silt removal scraper to sweep on the silt collecting seat, so that the magnetic flocs pass into the silt collecting hole to achieve solid-liquid separation; S4, then the transmission pump at the side end of the magnetic separator sends the magnetic flocs into the magnetic separator for separation, the magnetic separator separates the magnetic flocs into dirt and magnetic powder, and the magnetic powder is sent to the three-chamber dosing device through the pipeline for reuse, the water layer in the sludge sedimentation tank is immersed through the inclined tube filler, the fine flocs are precipitated in the inclined tube filler and precipitated to the bottom of the sludge sedimentation tank on the ramp, and then the water layer continues to immerse the upper layer and pass through the movable filter plate, and flows into the water collecting plate through the convergence of the water collecting tank, part of the water passes through the secondary filtration of the water filter box and flows into the water collecting plate through the second water collecting box, the water on the water collecting plate flows to the first water collecting box and flows into the ultraviolet disinfection tank through the water outlet hole to the water outlet pipe, and the water treatment is completed after ultraviolet disinfection in the ultraviolet disinfection tank; S5. Finally, under the state of water fluctuation, the movable filter plate of the hollow floating plate structure will cooperate with the spring, thereby driving the movable filter plate to swing up and down so that the holes of the movable filter plate are not easily blocked. When some holes are blocked, the filtered liquid level will rise, and the rising liquid level will increase the buoyancy of the movable filter plate. When the buoyancy exceeds a certain level, the rubber paddle will break through the obstruction of the rubber baffle, so that the movable filter plate floats up quickly. The floating movable filter plate cooperates with the spring to quickly allow water to enter and drain the cavity at the upper end of the abutment groove, thereby impacting the blocked holes to remove the blocked dirt. After the holes are through, the filtered water level drops and the buoyancy of the movable filter plate is reduced, so that the spring pushes the movable filter plate back to its original position and continues to float up and down to prevent the holes from being blocked, so that the movable filter plate has the ability to automatically prevent blockage and discharge sewage. The operation of the device ends here.

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