Multistage treatment device for pulping wastewater

Abstract

The invention discloses a multistage treatment device for pulping wastewater, and relates to the technical field of wastewater treatment, the multistage treatment device comprises a coarse filter tank, the top of the coarse filter tank is provided with a wastewater pipe for introducing pulping wastewater, and the coarse filter tank is internally provided with a coarse filter plate. The first sewage pump, the second sewage pump and the third sewage pump are used for pumping pulping wastewater into different treatment ponds, by additionally applying a pump structure, the pulping wastewater is pumped into different treatment procedures, and the situation that subsequent further filtration, flocculation, disinfection and other treatment cannot be conducted on a large amount of wastewater in the coarse filter is avoided; every time a waste water pipe transversely moves, a scraper blade can work in a matched mode to push and clean solid impurities left on a rough filter plate during previous movement of the waste water pipe, so that the filtering efficiency of the rough filter plate is guaranteed, the filtered solid impurities are prevented from being accumulated on the rough filter plate, and the pulping waste water is completely treated. The follow-up filtering efficiency is relatively low.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a multi-stage treatment device for pulping wastewater. Background Technology

[0002] Paper is an essential part of our daily life and work, but paper mills generate a lot of wastewater during the paper production process, especially waste paper pulping and papermaking plants, which produce even more wastewater. If the wastewater is discharged directly, it will cause serious environmental pollution. Therefore, pulping wastewater needs to be treated and reused in order to save water and protect the environment.

[0003] A search revealed Chinese Patent Publication No. CN221720658U, which discloses a papermaking wastewater treatment device. The device includes a wastewater treatment tank containing a coarse filter, a fine filter, a flocculation reaction tank, and a disinfection tank arranged sequentially. A filter screen assembly is installed inside the coarse filter, and a drive motor is installed outside the coarse filter. The drive motor is connected to the filter screen assembly. A filter layer is fixedly installed inside the fine filter. The advantages of this invention are: the drive motor drives the first filter screen to move back and forth, thereby rotating multiple brush rollers to clean the filter screen and prevent clogging; the reciprocating movement of the first filter screen increases the contact area between the wastewater and the filter screen, allowing wastewater to still filter out from around the filter cover even when a large amount of impurities accumulate at the bottom of the first filter screen, thus improving the sieving effect.

[0004] The aforementioned wastewater treatment device still has the following problems in actual use: The coarse filter and fine filter in this technical solution use an overflow method, allowing wastewater treated by the coarse filter to enter the fine filter. Only when the wastewater accumulation in the coarse filter exceeds the height of the overflow plate between the coarse and fine filters will the coarse-filtered wastewater enter the fine filter. However, due to the height of the overflow plate, wastewater in the coarse filter below the overflow plate height cannot be introduced into the fine filter. This results in a significant amount of wastewater in the coarse filter being unable to undergo further filtration, flocculation, disinfection, etc., leading to incomplete treatment of the pulping wastewater. Based on the above, this invention provides a multi-stage treatment device for pulping wastewater to solve the above problems. Summary of the Invention

[0005] The present invention provides a multi-stage treatment device for pulping wastewater to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A multi-stage treatment device for pulping wastewater includes a coarse filter tank, a wastewater pipe for introducing pulping wastewater is installed at the top of the coarse filter tank, and a coarse filter plate is installed inside the coarse filter tank.

[0007] The bottom of the coarse filter is fixedly connected to an outlet pipe 1. One end of the outlet pipe 1 is fixedly connected to a sewage pump 1. The output end of the sewage pump 1 is fixedly connected to a tee. One port of the tee is fixedly connected to an outlet pipe 2. The output end of the outlet pipe 2 is correspondingly provided with a flocculation sedimentation tank.

[0008] The flocculation sedimentation tank is fixedly connected to an outlet pipe three. One end of the outlet pipe three is fixedly connected to a sewage pump two. The output end of the sewage pump two is fixedly connected to an outlet pipe four. A disinfection treatment tank is set at the output end of the outlet pipe four. An outlet pipe five is fixedly connected to one side of the disinfection treatment tank. One end of the outlet pipe five is fixedly connected to a sewage pump three. The output end of the sewage pump three is fixedly connected to an outlet pipe six.

[0009] A further improvement of the technical solution of the present invention is that: a scraper is movably connected to the upper surface of the coarse filter plate, and the two sides of the scraper are movably connected to the two sides of the inner wall of the coarse filter tank. The scraper moves along the coarse filter plate and pushes the solid impurities left on the coarse filter plate to both ends of the coarse filter tank. At both ends of the coarse filter tank, a flipping cleaning component is provided to clean the solid impurities left on the filter pushed by the scraper.

[0010] A further improvement of the technical solution of the present invention is that: the flipping cleaning component includes side baffle mounting slots opened at both ends of the coarse filter tank, and two side baffles are fixedly connected to each other on the side baffle mounting slot at either end. A central sleeve is fixedly connected between the two side baffles, and a drive chain is movably connected to the outside of the central sleeve. A drive gear is meshed on the drive chain, and the drive gear is movably connected to the side baffles through a connecting shaft.

[0011] Multiple slag-collecting sleeves are fixedly connected to the drive chain. A movable slot is provided on the coarse filter tank between the coarse filter plate and the side baffle mounting slot. The slag-collecting sleeves are movably connected to the movable slot.

[0012] A further improvement of the technical solution of the present invention is that: when the slag-collecting sleeve plate is movably connected to the movable slot, the bottom of the inner cavity of the slag-collecting sleeve plate is flush with the upper surface of the coarse filter plate, and the connection between the slag-collecting sleeve plate and the movable slot and the coarse filter plate can maintain a seal.

[0013] A further improvement of the technical solution of the present invention is that a connecting block is fixedly connected to the back of the slag-collecting sleeve, and the connecting block is fixedly connected to one of the links of the drive chain.

[0014] A further improvement of the technical solution of the present invention is that: one end of the wastewater pipe is fixedly connected to an inlet box, one side of the inlet box is fixedly connected to a wastewater inlet pipe, and a guide rod and a drive rod are movably connected through a sliding block fixedly connected to the bottom of the inlet box. Both ends of the guide rod and the drive rod are connected to the outer surface of the coarse filter tank through a mounting plate.

[0015] A further improvement of the technical solution of the present invention is that: a groove is provided at the bottom of the scraper, and a plurality of spray holes are provided on the groove; one end of the spray hole located inside the scraper is connected through a diversion groove; and an inlet connected to the inside of the diversion groove is provided on the upper surface of the scraper.

[0016] A further improvement of the technical solution of the present invention is that: a flushing pipe is fixedly connected to the upper surface of the scraper at the inlet, one end of the flushing pipe is fixedly connected to a tee, and a valve is movably connected to the flushing pipe near the tee.

[0017] A further improvement of the technical solution of the present invention is that: two hanging ear plates are fixedly connected to the scraper, and a second driving rod is movably connected through each hanging ear plate. The two ends of the second driving rod are fixedly connected to the outer surface of the coarse filter tank through the second mounting plate.

[0018] A further improvement of the technical solution of the present invention is that: a filter residue discharge box is provided on one side of the side baffle at the flip-up position of the filter residue sleeve, a discharge pipe is fixedly connected to one side of the filter residue discharge box, and a discharge trolley is movably connected to the discharge pipe.

[0019] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows: 1. This invention provides a multi-stage treatment device for pulping wastewater. Wastewater pump one, wastewater pump two, and wastewater pump three are used to pump pulping wastewater into different treatment tanks. By adding additional pump structures, the pulping wastewater is pumped into different treatment processes, avoiding the problem that a large amount of wastewater in the coarse filter tank cannot be further filtered, flocculated, disinfected, etc., resulting in incomplete treatment of pulping wastewater.

[0020] 2. This invention provides a multi-stage treatment device for pulping wastewater. Each time the wastewater pipe moves horizontally, the scraper will work in coordination to push and clean the solid debris left on the coarse filter plate during the previous movement of the wastewater pipe, ensuring the filtration efficiency of the coarse filter plate and avoiding the problem of the filtered solid debris accumulating on the coarse filter plate, which would cause the subsequent filtration efficiency to be low.

[0021] 3. This invention provides a multi-stage treatment device for pulping wastewater. In the initial stage, the slag-collecting sleeves fixedly connected to the drive chains at both ends of the coarse filter are aligned with the movable slots. When the wastewater pipe moves closer to one of the slag-collecting sleeves along with the scraper, it pushes the solid debris left on the coarse filter onto the slag-collecting sleeve. When the scraper pushes and compresses the filtered debris within the range of the slag-collecting sleeve, the wastewater pipe stops moving, but the injection of pulping wastewater continues. When the scraper changes direction and leaves the bottom range of the slag-collecting sleeve, and the scraper has not yet passed the position of the wastewater pipe, the drive device's three drive gears drive the connecting shaft to rotate, and through the drive chain, drive the slag-collecting sleeve containing solid debris away from the position of the movable slot and move to the next position. At this time, the other slag-collecting sleeve moves to the position where it abuts the movable slot, ensuring that subsequent solid debris cleaning is not affected. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the multi-stage processing device of the present invention; Figure 2 This is a structural schematic diagram of the present invention from another angle; Figure 3 This is a schematic diagram of the structure at the connection between the scraper and the coarse filter plate and the inner wall of the coarse filter tank in this invention; Figure 4 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the structure of the flip-over cleaning component of the present invention; Figure 6 This is a schematic diagram of the structure of the slag-collecting sleeve of the present invention; Figure 7 This is a schematic diagram of the scraper structure of the present invention; Figure 8 This is a schematic cross-sectional view of the scraper section of the present invention.

[0023] In the diagram: 1. Coarse filter tank; 2. Wastewater pipe; 3. Inlet box; 4. Wastewater inlet pipe; 5. Guide rod; 6. Drive rod one; 7. Mounting plate one; 8. Drive device one; 9. Scraper; 10. Flushing pipe; 11. Hanging ear plate; 12. Groove; 13. Spray hole; 14. Diversion channel; 15. Drive rod two; 16. Mounting plate two; 17. Drive device two; 18. Coarse filter plate; 19. Outlet pipe one; 20. Sewage pump one; 21. T-junction; 22. Outlet pipe two; 23. Flocculation sedimentation tank; 24. Outlet pipe three; 25. Sewage pump two; 26. Outlet pipe four; 27. Disinfection treatment tank; 28. Outlet pipe five; 29. ​​Sewage pump three; 30. Outlet pipe six; 31. Movable slot; 32. Sludge support sleeve; 33. Connecting block; 34. Drive chain; 35. Support roller; 36. Center sleeve; 37. Drive gear; 38. Connecting shaft; 39. Side baffle; 40. Mounting bracket; 41. Drive device three; 42. Filter residue outlet box; 43. Discharge pipe; 44. Discharge trolley; 45. Drive device four; 46. Side baffle mounting slot. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to embodiments: Example

[0025] like Figure 1-8 As shown, this invention provides a multi-stage treatment device for pulping wastewater, including a coarse filter tank 1. A wastewater pipe 2 for introducing pulping wastewater is installed at the top of the coarse filter tank 1. One end of the wastewater pipe 2 is fixedly connected to an inlet box 3, and a wastewater inlet pipe 4 is fixedly connected to one side of the inlet box 3. A valve is movably connected to the wastewater inlet pipe 4. The valve is existing technology and can be an electrically controlled valve, etc., used to control whether wastewater flows out of the wastewater pipe 2. A guide rod 5 and a drive rod 6 are movably connected through a sliding block fixedly connected to the bottom of the inlet box 3. The drive rod 6 is threadedly connected to the sliding block. Both ends of the guide rod 5 and the drive rod 6 are connected to the outer surface of the coarse filter tank 1 through the mounting plate 7. The mounting plate 7 is equipped with a drive device 8, which is existing technology and includes equipment such as a motor and related accessories, used to drive the drive rod 6 to rotate. The coarse filter tank 1 is equipped with a coarse filter plate 18, which is existing technology and is a commonly used coarse filter structure in sewage treatment. The coarse filter plate 18 is connected to the inside of the coarse filter tank 1 in a detachable manner.

[0026] The drive device 8 drives the drive rod 6 to rotate, which in turn moves the wastewater pipe 2 and the inlet box 3 together along the drive device 8 to different positions. The output end of the wastewater pipe 2 is aligned with the middle of the coarse filter plate 18. By moving the wastewater pipe 2 to different positions, pulping wastewater can fall into all positions of the coarse filter plate 18, fully covering the filtration range of the coarse filter plate 18 and making full use of the filtration efficiency of the coarse filter plate 18. This avoids the problem that if the position of the wastewater pipe 2 is fixed, too much filtered solid impurities will accumulate on the coarse filter plate 18 corresponding to the output port of the wastewater pipe 2, affecting the filtration efficiency. At the same time, the filtration effect of the coarse filter plate 18 at the position far from the output port of the wastewater pipe 2 will not be fully utilized, leading to a further reduction in filtration efficiency.

[0027] The bottom of the coarse filter tank 1 is fixedly connected to an outlet pipe 19. One end of the outlet pipe 19 is fixedly connected to a sewage pump 20. The output end of the sewage pump 20 is fixedly connected to a tee 21. One port of the tee 21 is fixedly connected to an outlet pipe 22. The output end of the outlet pipe 22 is correspondingly provided with a flocculation sedimentation tank 23.

[0028] A discharge pipe 3 24 is fixedly connected to the flocculation sedimentation tank 23. A sewage pump 25 is fixedly connected to one end of the discharge pipe 3 24. A discharge pipe 4 26 is fixedly connected to the output end of the sewage pump 25. A disinfection treatment tank 27 is set at the output end of the discharge pipe 4 26. A discharge pipe 5 28 is fixedly connected to one side of the disinfection treatment tank 27. A sewage pump 3 29 is fixedly connected to one end of the discharge pipe 5 28. A discharge pipe 6 30 is fixedly connected to the output end of the sewage pump 3 29.

[0029] Pulping wastewater is introduced into the inlet box 3 through wastewater inlet pipe 4, and then sprayed onto the coarse filter plate 18 through wastewater pipe 2. Large particles of solid impurities carried in the pulping wastewater will remain on the coarse filter plate 18. After filtration, the wastewater carrying smaller particles falls to the bottom of the coarse filter tank 1. The coarsely filtered wastewater in the coarse filter tank 1 is discharged to the flocculation sedimentation tank 23 through sewage pump 20, outlet pipe 19, and outlet pipe 22. Flocculant is added to the flocculation sedimentation tank 23 to treat the coarsely filtered wastewater by flocculation and sedimentation. The flocculated and settled wastewater is then introduced into the disinfection treatment tank 27 through the action of outlet pipe 3 24, sewage pump 2 25, and outlet pipe 4 26. Disinfectant is added to 27 to disinfect the wastewater. Then, the disinfected wastewater is introduced into the next process through outlet pipe 5 28, sewage pump 3 29, and outlet pipe 6 30 for subsequent treatment or testing, until the pulping wastewater is treated to meet the discharge standards. Sewage pump 1 20, sewage pump 2 25, and sewage pump 3 29 are all existing technologies used to pump pulping wastewater into different treatment tanks. By adding additional pump structures, pulping wastewater is pumped into different treatment processes, avoiding the problem that a large amount of wastewater in the coarse filter tank cannot be further filtered, flocculated, disinfected, etc., resulting in incomplete treatment of pulping wastewater.

[0030] Furthermore, a scraper 9 is movably connected to the upper surface of the coarse filter plate 18. The two sides of the scraper 9 are movably connected to the inner walls of the coarse filter tank 1. Two hanging ear plates 11 are fixedly connected to the scraper 9. A second drive rod 15 is movably connected through each hanging ear plate 11. The hanging ear plate 11 and the second drive rod 15 are threaded together. The two ends of the second drive rod 15 are fixedly connected to the outer surface of the coarse filter tank 1 through the second mounting plate 16. A second drive device 17 is fixedly installed on the second mounting plate 16. The second drive device 17 is existing technology and includes equipment such as a motor and related accessories. The second drive device 17 drives the second drive rod 15 to rotate, which causes the hanging ear plates 11 to drive the scraper 9 to move along the coarse filter plate 18, pushing the solid debris left on the coarse filter plate 18 to both ends of the coarse filter tank 1. Both ends of the coarse filter tank 1 are provided with a flipping cleaning component to clean the solid debris left on the filter pushed by the scraper 9.

[0031] Wastewater pipe 2 moves back and forth along coarse filter plate 18, pouring pulping wastewater to different positions on coarse filter plate 18. Solid impurities remain on top of coarse filter plate 18, while water and smaller solid particles fall through the mesh of coarse filter plate 18 into the bottom of coarse filter tank 1. With the cooperation of other structures, the coarsely filtered wastewater is further treated. Scraper 9 slides along the filter chamber formed by coarse filter tank 1 and coarse filter plate 18, pushing the solid impurities left by coarse filter plate 18 to both ends of coarse filter tank 1. The solid impurities left by filtration are cleaned away by the action of the flipping cleaning component.

[0032] The movement of the scraper 9 and the wastewater pipe 2 is as follows: In the initial stage, the wastewater pipe 2 and the scraper 9 are respectively located at both ends of the coarse filter tank 1. The wastewater pipe 2 is started, introducing pulping wastewater and gradually moving closer to the scraper 9. When the wastewater pipe 2 moves to the scraper 9, the scraper 9 moves in the opposite direction to the movement of the wastewater pipe 2, pushing and collecting the solid debris left on the coarse filter plate 18 during the previous movement of the wastewater pipe 2, and cleaning the pushed solid debris by flipping the cleaning component. When the scraper 9 moves past the wastewater pipe 2, the wastewater pipe 2 changes its movement direction and moves with the scraper 9. The wastewater pipe 2 is located at the rear of the scraper 9's movement direction. At this time, the scraper 9 can clean the solid debris generated during the previous movement of the wastewater pipe 2. At the same time, the pulping wastewater sprayed from the wastewater pipe 2 falls onto the coarse filter plate 18 where the filtered debris has been cleaned, and the coarse filter plate 18 continuously filters the pulping wastewater. This technical solution has the following beneficial effects: First, the scraper 9 can clean the coarse filter plate 18 in real time, eliminating the need for manual cleaning and saving labor costs. Second, every time the wastewater pipe 2 moves horizontally, the scraper 9 will work together to push and clean the solid debris left on the coarse filter plate 18 when the wastewater pipe 2 moves in the previous time, so as to ensure the filtration efficiency of the coarse filter plate 18 and avoid the accumulation of filtered solid debris on the coarse filter plate 18, which would cause the subsequent filtration efficiency to be low. 3. The scraper 9 divides the filtration space formed between the coarse filter tank 1 and the coarse filter plate 18 into two parts. The part in the direction of the scraper 9's movement is where the solid debris left by the filter when the wastewater pipe 2 moves is cleaned by the scraper 9. At this time, the wastewater pipe 2 is in the other part of the space in the opposite direction of the scraper 9's movement. This part of the space is the space that the scraper 9 has already moved and cleaned. On the one hand, the pulping wastewater sprayed from the wastewater pipe 2 can have a certain washing effect on the cleaned coarse filter plate 18, washing away the solid particles embedded in the gaps of the coarse filter plate 18, and can also fully filter the pulping wastewater injected later, ensuring the filtration effect of the coarse filter plate 18. Fourth, this technical solution divides the same filter structure into two parts: one part is used to filter the pulping wastewater sprayed from the wastewater pipe 2, and the other part is used to clean the solid debris left on the coarse filter plate 18. This means that the filter structure of this technical solution can filter the coarse filter plate 18 without stopping the injection of wastewater from the wastewater pipe 2, avoiding the problem that the use of the entire filter structure needs to be stopped to clean the coarse filter plate 18, which would interrupt the filtration process and affect the filtration efficiency. Fifth, when the scraper 9 moves laterally to clean the solid debris filtered by the coarse filter plate 18, it can also play a compression role. It can not only squeeze out the residual water in the solid debris left by filtration, but also squeeze the solid debris left by filtration, so that the volume of the solid debris pushed into the slag tray 32 is reduced, thus facilitating subsequent processing.

[0033] Furthermore, the tilting cleaning assembly includes side baffle mounting slots 46 located at both ends of the coarse filter tank 1. Two side baffles 39 are fixedly connected to each other on the side baffle mounting slot 46 at either end. A central sleeve 36 is fixedly connected between the two side baffles 39. A drive chain 34 is movably connected to the outside of the central sleeve 36. A drive gear 37 is meshed on the drive chain 34. The drive gear 37 is movably connected to the side baffles 39 through a connecting shaft 38. The connecting shaft 38 and the drive gear 37 are fixedly connected. A mounting bracket 40 is fixedly connected to the top of the side baffles 39. A drive device 31 is fixedly connected to the mounting bracket 40. The drive device 31 is existing technology and includes equipment such as a motor and related accessories. The output end of the drive device 31 is connected to the connecting shaft 38 located at a high position through a structure such as a gear, chain, or transmission belt, driving the drive gear 37 to drive the connecting shaft 38 to rotate.

[0034] A filter residue discharge box 42 is provided on one side of the side baffle 39 at the flip-up location of the slag-collecting sleeve 32. A spiral push rod is installed inside the filter residue discharge box 42. The spiral push rod is a rotating shaft structure commonly used in the prior art to push objects to move. A drive device 45 is fixedly installed on the filter residue discharge box 42. The drive device 45 is a prior art device, including a motor and other equipment and related accessories. A discharge pipe 43 is fixedly connected to one side of the filter residue discharge box 42. A discharge trolley 44 is movably connected to the discharge pipe 43. The discharge trolley 44 is a transfer trolley structure commonly used in the prior art. The discharge trolley 44 has a handle and a pulley with a self-locking function installed at the bottom. The filter debris that falls from the slag-collecting sleeve 32 on the drive chain 34 can be transferred by the discharge trolley 44.

[0035] Multiple slag-collecting sleeves 32 are fixedly connected to the drive chain 34. A connecting block 33 is fixedly connected to the back of the slag-collecting sleeve 32. The connecting block 33 is fixedly connected to one link of the drive chain 34. A support roller 35 is movably connected to the connecting block 33. The support roller 35 abuts against the center sleeve 36 and supports the slag-collecting sleeve 32. A movable slot 31 is provided on the coarse filter tank 1 between the coarse filter plate 18 and the side baffle mounting slot 46. The slag-collecting sleeve 32 is movably connected to the movable slot 31. When the slag-collecting sleeve 32 is movably connected to the movable slot 31, the bottom of the inner cavity of the slag-collecting sleeve 32 is flush with the upper surface of the coarse filter plate 18, and the connection between the slag-collecting sleeve 32, the movable slot 31, and the coarse filter plate 18 can maintain a seal.

[0036] In the initial stage, the slag-collecting sleeves 32 fixedly connected to the drive chains 34 at both ends of the coarse filter tank 1 are aligned with the movable slots 31. When the wastewater pipe 2 moves closer to one of the slag-collecting sleeves 32 along with the scraper 9, it pushes the solid debris left on the coarse filter plate 18 onto the slag-collecting sleeve 32. When the scraper 9 pushes and compresses the filtered debris within the range of the slag-collecting sleeve 32, the wastewater pipe 2 stops moving, but the injection of pulping wastewater continues. When the scraper 9 changes direction and leaves the bottom range of the slag-collecting sleeve 32, and at this time the scraper 9 has not passed the position of the wastewater pipe 2, the drive device 341 drives the drive gear 37 to drive the connecting shaft 38 to rotate. Through the drive chain 34, the slag-collecting sleeve 32 containing solid debris leaves the position of the movable slot 31 and moves to the next position. At this time, the other slag-collecting sleeve 32 moves to the position where it abuts the movable slot 31, ensuring that the subsequent cleaning of solid debris is not affected.

[0037] Because the connection between the slag-collecting sleeve 32 and the movable slot 31 and the coarse filter plate 18 can maintain a seal, when the previous slag-collecting sleeve 32 carries away the filtered debris, a new filtration space is formed between the newly added slag-collecting sleeve 32, the scraper 9, the movable slot 31, and the coarse filter plate 18. When the scraper 9 continues to move past the position of the wastewater pipe 2, the wastewater pipe 2 moves with the scraper 9. This space can continue to be used to filter the pulping wastewater output from the wastewater pipe 2, ensuring the continuity of the filtration and cleaning process.

[0038] The slag-collecting sleeve 32 is fixedly connected to one link of the drive chain 34 via the connecting block 33, so that when the drive chain 34 moves the slag-collecting sleeve 32 to a high point, the flipping and angle change of the slag-collecting sleeve 32 are not affected. The compressed filter debris temporarily stored in the slag-collecting sleeve 32 will be poured out into the filter debris discharge box 42. The drive device 45 drives the spiral push rod to rotate, pushing the filter debris that falls into the filter debris discharge box 42 out through the discharge pipe 43 and into the discharge trolley 44. The discharge trolley 44 then transfers the filter debris to other locations for centralized subsequent processing.

[0039] Furthermore, a groove 12 is provided at the bottom of the scraper 9, and multiple spray holes 13 are provided on the groove 12. One end of the spray hole 13 located inside the scraper 9 is connected through a diversion groove 14. An inlet port connected to the inside of the diversion groove 14 is provided on the upper surface of the scraper 9. A flushing pipe 10 is fixedly connected to the upper surface of the scraper 9 at the inlet port. One end of the flushing pipe 10 is fixedly connected to a tee 21. A valve is movably connected to the flushing pipe 10 near the tee 21. The valve is existing technology, including an electrically controlled valve, which can be used to control the introduction of flushing fluid into the flushing pipe 10.

[0040] The rinsing fluid enters the diversion tank 14 through the top inlet of the scraper 9, and is then sprayed out through the spray holes 13 in the diversion channel of the diversion tank 14. The lower surface of the scraper 9 is in close contact with the upper surface of the coarse filter plate 18. The nozzle diameter of the spray holes 13 is small, and the cleaning fluid sprayed from the spray holes 13 can rinse the coarse filter plate 18. While the scraper 9 moves back and forth to push and clean the filter debris on the coarse filter plate 18, the cleaning fluid sprayed from the spray holes 13 rinses the coarse filter plate 18, avoiding the problem of blockage caused by small particles.

[0041] With the cooperation of flushing pipe 10 and valve, the coarsely filtered wastewater discharged from outlet pipe 19 is introduced into diversion tank 14 through tee 21 and flushing pipe 10 to flush the coarse filter plate 18, thus avoiding the problem of water waste caused by using freshly injected cleaning liquid to flush the coarse filter plate 18.

[0042] It also includes a PLC control system and other related equipment, which are electrically connected to each of the electrical control devices in this application to ensure the real-time performance and accuracy of control commands and to meet the continuous operation requirements of each device in this application.

Claims

1. A multi-stage treatment device for pulping wastewater, characterized in that: Includes a coarse filter tank (1), the top of which is provided with a wastewater pipe (2) for introducing pulping wastewater, and a coarse filter plate (18) is installed inside the coarse filter tank (1). The bottom of the coarse filter (1) is fixedly connected to an outlet pipe (19), one end of the outlet pipe (19) is fixedly connected to a sewage pump (20), the output end of the sewage pump (20) is fixedly connected to a tee (21), one port of the tee (21) is fixedly connected to an outlet pipe (22), and the output end of the outlet pipe (22) is correspondingly provided with a flocculation sedimentation tank (23). The flocculation sedimentation tank (23) is fixedly connected to an outlet pipe three (24), one end of the outlet pipe three (24) is fixedly connected to a sewage pump two (25), the output end of the sewage pump two (25) is fixedly connected to an outlet pipe four (26), the output end of the outlet pipe four (26) is correspondingly provided with a disinfection treatment tank (27), one side of the disinfection treatment tank (27) is fixedly connected to an outlet pipe five (28), one end of the outlet pipe five (28) is fixedly connected to a sewage pump three (29), the output end of the sewage pump three (29) is fixedly connected to an outlet pipe six (30); The upper surface of the coarse filter plate (18) is movably connected to a scraper (9). The scraper (9) is movably connected to the inner wall of the coarse filter tank (1) on both sides. The scraper (9) moves along the coarse filter plate (18) and pushes the solid debris left on the coarse filter plate (18) to both ends of the coarse filter tank (1). Both ends of the coarse filter tank (1) are provided with a flipping cleaning component to clean the solid debris left on the filter pushed by the scraper (9).

2. The multi-stage treatment device for pulping wastewater according to claim 1, characterized in that: The overturning cleaning assembly includes side baffle mounting slots (46) at both ends of the coarse filter tank (1). Two side baffles (39) are fixedly connected to each other on the side baffle mounting slot (46) at either end. A central sleeve (36) is fixedly connected between the two side baffles (39). A drive chain (34) is movably connected to the outside of the central sleeve (36). A drive gear (37) is meshed on the drive chain (34). The drive gear (37) is movably connected to the side baffles (39) through a connecting shaft (38). Multiple slag-collecting sleeves (32) are fixedly connected to the drive chain (34). A movable slot (31) is provided on the coarse filter tank (1) between the coarse filter plate (18) and the side baffle mounting slot (46). The slag-collecting sleeves (32) are movably connected to the movable slot (31).

3. The multi-stage treatment device for pulping wastewater according to claim 2, characterized in that: When the slag-collecting sleeve (32) is movably connected to the movable slot (31), the bottom of the inner cavity of the slag-collecting sleeve (32) is flush with the upper surface of the coarse filter plate (18), and the connection between the slag-collecting sleeve (32) and the movable slot (31) and the coarse filter plate (18) can maintain a seal.

4. The multi-stage treatment device for pulping wastewater according to claim 2, characterized in that: A connecting block (33) is fixedly connected to the back of the slag tray (32), and the connecting block (33) is fixedly connected to one of the links of the drive chain (34).

5. A multi-stage treatment device for pulping wastewater according to claim 1, characterized in that: One end of the wastewater pipe (2) is fixedly connected to an inlet box (3), and one side of the inlet box (3) is fixedly connected to a wastewater inlet pipe (4). A guide rod (5) and a drive rod (6) are movably connected through a sliding block fixedly connected to the bottom of the inlet box (3). Both ends of the guide rod (5) and the drive rod (6) are connected to the outer surface of the coarse filter (1) through a mounting plate (7).

6. The multi-stage treatment device for pulping wastewater according to claim 1, characterized in that: The scraper (9) has a groove (12) at the bottom and multiple spray holes (13) on the groove (12). One end of the spray hole (13) inside the scraper (9) is connected through a diversion groove (14). The upper surface of the scraper (9) is provided with an inlet that is connected to the inside of the diversion groove (14).

7. The multi-stage treatment device for pulping wastewater according to claim 1, characterized in that: The upper surface of the scraper (9) is fixedly connected to the flushing pipe (10) at the inlet. One end of the flushing pipe (10) is fixedly connected to the tee (21). A valve is movably connected to the flushing pipe (10) near the tee (21).

8. A multi-stage treatment device for pulping wastewater according to claim 1, characterized in that: Two hanging ear plates (11) are fixedly connected to the scraper (9). Each hanging ear plate (11) is movably connected to a second drive rod (15). The two ends of the second drive rod (15) are fixedly connected to the outer surface of the coarse filter (1) through the second mounting plate (16).

9. A multi-stage treatment device for pulping wastewater according to claim 2, characterized in that: The side baffle (39) is provided with a filter residue discharge box (42) at the flip-up position of the slag tray (32). A discharge pipe (43) is fixedly connected to one side of the filter residue discharge box (42), and a discharge trolley (44) is movably connected to the discharge pipe (43).

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