A multi-stage treatment device and method for wetland chemical wastewater

Abstract

The present application relates to sewage treatment technical field, disclose a kind of wetland chemical sewage multistage processing equipment and processing method, including sewage tank, filter bin, sedimentation bin, flocculation bin are sequentially arranged in the sewage tank, mobile filter screen, cleaning mechanism, outlet pipe are arranged in the filter bin, the cleaning mechanism includes screw rod, turnover piece, backflush pipe, recovery basket, replacement filter screen, push screen are further provided in the filter bin, filter plate is provided on the replacement filter screen;The present application achieves to realize the cleaning of mobile filter screen, also will not interrupt the filtration of sewage, to improve the filtration efficiency of sewage, and by the way of backflush, greatly improve the removal effect of impurities in mobile filter screen, simultaneously, after replacement filter screen reset, push screen can also scrape the impurities remaining in replacement filter screen to mobile filter screen, to realize the cleaning effect of replacement filter screen.

Description

Technical Field

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

[0002] Wetland chemical wastewater treatment refers to the construction of artificial wetlands by imitating the structure and function of natural wetlands. As an ecological and in-depth treatment method, it mainly utilizes an ecosystem composed of filler (substrate), wetland plants, and microorganisms. Through a comprehensive process of filtration, adsorption, microbial decomposition, and plant absorption, it further removes pollutants that remain in chemical wastewater after traditional treatment. Before wetland treatment, chemical wastewater needs to undergo multi-stage treatment to minimize harmful substances in the wastewater.

[0003] Chinese patent CN223357496U discloses a multi-stage wastewater treatment device for chemical engineering, which includes a square filter frame, a secondary treatment cylinder, and a biological oxidation tank. A square box is fixedly connected to the left side of the square filter frame. A geared motor is fixedly connected to the inner bottom wall of the square box. A lead screw is fixedly connected to the output end of the geared motor. A square screw plate is threaded onto the outer surface of the lead screw. Two transmission rods are fixedly connected to the upper surface of the square screw plate. The top end of each transmission rod penetrates the square box and extends to the top of the square box. A connecting plate is fixedly connected to the top end of each transmission rod. This allows the coarse filter screen to be removed from the square filter frame for easy disassembly and cleaning of debris on the screen. This prevents the screen from becoming clogged and affecting subsequent wastewater treatment, making cleaning easier and simplifying the process. However, the above technical solution still has certain drawbacks in use. For example, when the sewage has not been filtered completely, but a lot of impurities have accumulated in the filter screen, the user can only stop the sewage filtration and take out the filter screen for cleaning. This method will affect the filtration efficiency of the sewage. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multi-stage treatment device and method for wetland chemical wastewater, solving the aforementioned problems.

[0005] To solve the above technical problems, the present invention provides the following technical solution: a multi-stage treatment device for wetland chemical wastewater, including a wastewater tank, wherein a filter chamber, a sedimentation chamber, and a flocculation chamber are arranged sequentially in the wastewater tank; the filter chamber is provided with a movable filter screen, a cleaning mechanism, and an outlet pipe; the movable filter screen is used to filter the wastewater, and the outlet pipe is used to discharge the wastewater. The cleaning mechanism includes a lead screw, a tilting component, a backwash pipe, and a collection basket. The lead screw is used to drive the moving filter screen to move, the tilting component is used to drive the moving filter screen to tilt, the backwash pipe is used to rinse the tilted moving filter screen, and the collection basket is used to collect impurities inside the moving filter screen. The filter chamber is also equipped with a replacement filter screen and a pusher screen. The replacement filter screen is equipped with a filter plate. The replacement filter screen is used to replace the moving filter screen after it moves. When the screw rotates, the replacement filter screen can move. The pusher screen is used to remove impurities from the replacement filter screen. The lead screw has two states: forward rotation and reverse rotation. During the forward rotation phase, the lead screw drives the movable filter screen to move towards the recycling basket. Then, the flipping component forces the movable filter screen to flip until the inner bottom surface of the movable filter screen is opposite to the recycling basket. After the movable filter screen flips, the flipping component drives the backwash pipe to flip above the movable filter screen. During the operation of the lead screw, the replacement filter screen can move towards the outlet pipe. At this time, the filter plate closes, sealing the replacement filter screen. During the reversal phase, the flipping component sequentially drives the backflushing tube and the moving filter to flip and reset. Then, the lead screw drives the moving filter to reset. During the reset of the moving filter, the pusher can scrape off the impurities in the replacement filter. After the moving filter is reset, the pusher can open the filter plate. At this time, the pusher can push the impurities in the replacement filter into the moving filter.

[0006] Preferably, both ends of the lead screw are rotatably connected to the sewage tank via bearing seats, and both ends of the lead screw extend out of the sewage tank. One end of the lead screw is fixedly connected to a driven bevel gear, and a driving bevel gear meshes with the outer side of the driven bevel gear. A stepper motor is fixedly connected to the outer side of the driving bevel gear, and the stepper motor is fixedly connected to the sewage tank.

[0007] Preferably, a drive bevel gear is fixedly connected to the other end of the lead screw, a speed-changing bevel gear meshes with the outer side of the drive bevel gear, a transmission shaft is fixedly connected to the inner side of the speed-changing bevel gear, the two ends of the transmission shaft are mounted on the sewage tank through bearing seats, a drive gear is fixedly connected to the transmission shaft, a drive rack meshes with the outer side of the drive gear, and the drive rack is fixedly connected to one side of the replacement filter screen.

[0008] Preferably, a connecting plate is fixedly connected to the movable filter screen, a rotating shaft is fixedly connected to the inner side of the connecting plate, and a sliding frame is rotatably connected to the outer side of the rotating shaft. The rotating shaft is mounted on the sliding frame through a bearing seat. The sliding frame is threadedly connected to the lead screw, and a limit bolt is slidably connected to the end of the sliding frame away from the lead screw. The limit bolt is fixedly connected to the sewage tank. Support shafts are fixedly connected to both sides of the end of the movable filter screen away from the connecting plate. The bottom of the support shaft abuts against a base, and the base is fixedly connected to the sliding frame.

[0009] Preferably, the flipping component includes a movable gear, which is fixedly connected to one end of the rotating shaft. A movable rack meshes with the outer side of the movable gear. A movable bolt is slidably connected to the bottom of the movable rack. The movable bolt is fixedly connected to one side of the sliding frame. A return spring is fixedly connected to one end of the movable rack. The end of the return spring away from the movable rack is fixedly connected to the sliding frame.

[0010] Preferably, the flipping component further includes a support plate and a fixed rack. A flipping gear meshes with the outer side of the fixed rack, and a connecting shaft is fixedly connected to the inner side of the flipping gear. The connecting shaft is mounted on the sewage tank through a bearing seat, and a bracket is fixedly connected to the connecting shaft. The backflushing pipe is mounted on the bracket. A fixing bolt is slidably connected to the outer side of the fixed rack, and the fixing bolt is fixedly connected to the inner side of the sewage tank. A connecting spring is fixedly connected to the fixed rack, and the end of the connecting spring away from the fixed rack is fixedly connected to the inner side of the sewage tank. When the support plate moves, it can contact the fixed rack.

[0011] Preferably, the filter chamber has an opening, a tray is fixedly connected to the inside of the opening, the tray communicates with the filter chamber, a limit rod is fixedly connected to the tray, the replacement filter screen is slidably connected to the limit rod, and a roller is provided at the bottom of the replacement filter screen. A stabilizing spring is fixedly connected to the outside of the replacement filter screen, and the end of the stabilizing spring away from the replacement filter screen is fixedly connected to the sewage tank.

[0012] Preferably, the replacement filter screen has a discharge port, a connecting rod is slidably connected to the replacement filter screen, one end of the connecting rod passes through the replacement filter screen and is fixedly connected to the filter plate, a limit spring is fixedly connected to the connecting rod, the end of the limit spring away from the connecting rod is fixedly connected to the replacement filter screen, the push screen is fixedly connected to the inside of the filter chamber, and symmetrically distributed guide rods are fixedly connected to one side of the push screen.

[0013] Preferably, the recycling basket is connected to the filter chamber, and the recycling basket has a built-in barrier net. A conveying pump is provided inside the filter chamber, and the backwash pipe is connected to the conveying pump.

[0014] A multi-stage treatment method for wetland chemical wastewater uses the aforementioned multi-stage wetland chemical wastewater treatment equipment.

[0015] Compared with the prior art, the present invention provides a multi-stage treatment device and method for wetland chemical wastewater, which has the following beneficial effects: 1. In use, this invention uses a movable filter screen to coarsely filter wastewater discharged from the outlet pipe. When cleaning the movable filter screen is required, a screw drives the screen to move towards the recovery basket. The movement of the screen causes a flipping mechanism to move synchronously. Once the screen reaches the vicinity of the recovery basket, the flipping mechanism flips the screen, dumping impurities into the basket. As the screw drives the screen, a replacement filter screen moves back to its original position due to the screw's rotation. This replacement screen then takes over filtering the wastewater discharged from the outlet pipe, allowing for cleaning of the screen without interrupting wastewater filtration. This improves filtration efficiency and enhances practicality.

[0016] 2. In this invention, after the rotating component drives the moving filter screen to rotate, the rotating component also drives the backflushing pipe to rotate as the lead screw rotates. At this time, the backflushing pipe is driven to rotate above the rotated moving filter screen. The backflushing pipe then rinses the moving filter screen, allowing impurities inside the moving filter screen to fall fully into the collection basket, thereby improving the cleaning effect of the moving filter screen. After cleaning, the lead screw reverses to drive the moving filter screen and the replacement filter screen to reset. As the replacement filter screen resets, the pusher screen can block the impurities inside the replacement filter screen. With the cooperation of the moving replacement filter screen, the impurities inside the replacement filter screen are pushed to the filter plate. Then, the pusher screen can push open the filter plate, pushing the impurities inside the replacement filter screen into the moving filter screen, thereby achieving the cleaning effect of the replacement filter screen and greatly improving the ease of use. Attached Figure Description

[0017] Figure 1 This is a first-view schematic diagram of the present invention; Figure 2 This is a schematic diagram from a second perspective of the present invention; Figure 3 This is an overall side sectional view of the present invention; Figure 4 This is a first-view schematic diagram of the filter chamber of the present invention; Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 for Figure 4 Enlarged schematic diagram of the structure at point B; Figure 7 This is a second-view schematic diagram of the filter chamber of the present invention; Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point C; Figure 9 This is a third-view schematic diagram of the filter chamber of the present invention; Figure 10 This is a fourth-view schematic diagram of the filter chamber of the present invention.

[0018] In the picture: 1. Sewage tank; 2. Filter chamber; 21. Tray; 22. Limiting rod; 23. Stabilizing spring; 3. Sedimentation tank; 4. Flocculation tank; 5. Moving filter screen; 51. Connecting plate; 52. Rotating shaft; 53. Sliding frame; 54. Limit bolt; 55. Support shaft; 56. Base; 6. Cleaning services; 61. Lead screw; 611. Driven bevel gear; 612. Driving bevel gear; 613. Stepper motor; 614. Drive bevel gear; 615. Variable speed bevel gear; 616. Drive shaft; 617. Drive gear; 618. Drive rack; 62. Flipping component; 621. Moving gear; 622. Moving rack; 623. Moving bolt; 624. Return spring; 625. Support plate; 626. Fixed rack; 627. Flipping gear; 628. Coupling shaft; 629. Bracket; 6210. Fixed bolt; 6211. Connecting spring; 63. Backflush pipe; 64. Recovery basket; 7. Replace the filter screen; 71. Filter plate; 72. Connecting rod; 73. Limit spring; 8. Push the net; 9. Water outlet pipe. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a multi-stage treatment device and method for wetland chemical wastewater.

[0021] Example 1: Please refer to Figures 1-10A multi-stage wastewater treatment device for wetland chemical plants includes a wastewater tank 1, which contains a filter chamber 2, a sedimentation chamber 3, and a flocculation chamber 4 arranged sequentially. Each of the filter chamber 2, sedimentation chamber 3, and flocculation chamber 4 is equipped with a liftable conveying pump, and each conveying pump is equipped with an intercepting net on its outside. The filter chamber 2 contains a movable filter screen 5, a cleaning mechanism 6, and an outlet pipe 9. The movable filter screen 5 is used to filter the wastewater, and the outlet pipe 9 is used to discharge the wastewater. The cleaning mechanism 6 includes a lead screw 61, a tilting component 62, a backwash pipe 63, and a collection basket 64. The lead screw 61 is used to drive the moving filter screen 5 to move, the tilting component 62 is used to drive the moving filter screen 5 to tilt, the backwash pipe 63 is used to rinse the tilted moving filter screen 5, and the collection basket 64 is used to collect impurities in the moving filter screen 5. The collection basket 64 is connected to the filter chamber 2 and has a built-in barrier net. A conveying pump is provided inside the filter chamber 2, and the backwash pipe 63 is connected to the conveying pump. The filter chamber 2 is also equipped with a replacement filter screen 7 and a push screen 8. The replacement filter screen 7 is equipped with a filter plate 71. The replacement filter screen 7 is used to replace the moving filter screen 5 after it moves. When the screw 61 is running, the replacement filter screen 7 can move. The push screen 8 is used to remove impurities in the replacement filter screen 7. The lead screw 61 has two states: forward rotation and reverse rotation. During the forward rotation phase, the lead screw 61 drives the moving filter screen 5 to move towards the recovery basket 64. Then, the flipping component 62 can force the moving filter screen 5 to flip until the inner bottom surface of the moving filter screen 5 is opposite to the recovery basket 64. After the moving filter screen 5 flips, the flipping component 62 can drive the backwash pipe 63 to flip above the moving filter screen 5. During the operation of the lead screw 61, the replacement filter screen 7 can move towards the water outlet pipe 9. At this time, the filter plate 71 is closed, sealing the replacement filter screen 7. During the reversal phase, the flipping component 62 sequentially drives the backflushing pipe 63 and the moving filter screen 5 to flip and reset. Then, the lead screw 61 drives the moving filter screen 5 to reset. During the reset of the moving filter screen 5, the pusher screen 8 can scrape off the impurities in the replacement filter screen 7. After the moving filter screen 5 is reset, the pusher screen 8 can open the filter plate 71. At this time, the pusher screen 8 can push the impurities in the replacement filter screen 7 into the moving filter screen 5.

[0022] In operation, the moving filter screen 5 coarsely filters the wastewater discharged from the outlet pipe 9. The filtered wastewater is then pumped to the sedimentation tank 3 and flocculation tank 4 for further treatment, thus achieving multi-stage wastewater treatment. When cleaning the moving filter screen 5 is required, the screw 61 rotates forward, driving the moving filter screen 5 towards the recovery basket 64. This movement of the moving filter screen 5 causes the tilting component 62 to move. Once the moving filter screen 5 is near the recovery basket 64, the tilting component 62 drives the moving filter screen 5 to tilt. At this point, the moving filter screen... Impurities inside screen 5 are poured into the recovery basket 64. After the moving screen 5 flips, the flipping component 62 continues to move, thereby driving the backwash pipe 63 to flip again. At this time, the backwash pipe 63 is flipped and moves above the flipped moving screen 5. Then, the moving screen 5 is backwashed through the backwash pipe 63, thereby flushing the impurities remaining in the moving screen 5 into the recovery basket 64. At this time, the backwashed water re-enters the filter chamber 2, while the impurities remain in the recovery basket 64. When the screw 61 drives the moving screen 5 to move, the filter replacement... The screen 7 moves back to its original position due to the rotation of the screw 61, replacing the moving screen 5 to filter the sewage discharged from the outlet pipe 9. After cleaning, the screw 61 is reversed, at which point the flipping component 62 sequentially drives the backwash pipe 63 and the moving screen 5 to flip and reset. Then, the screw 61 drives the moving screen 5 to its original position. After the screw 61 reverses, it drives the replacement screen 7 to gradually reset. When the replacement screen 7 resets, the pusher 8 pushes the impurities in the replacement screen 7 towards the filter plate 71. Then, the pusher 8 drives the filter plate 71 to open, and pushes the impurities in the replacement filter 7 into the moving filter 5. This achieves the goal of cleaning the moving filter 5 without interrupting the filtration of sewage, thereby improving the filtration efficiency of sewage. Furthermore, the backwashing method significantly improves the removal effect of impurities in the moving filter 5. At the same time, after the replacement filter 7 is reset, the pusher 8 can also scrape the impurities remaining in the replacement filter 7 into the moving filter 5, thereby achieving the effect of cleaning the replacement filter 7.

[0023] It should be noted that the recycling basket 64 is detachable, which facilitates the removal of impurities inside the recycling basket 64.

[0024] Example 2: See Figures 1-10Unlike Embodiment 1 described above, the two ends of the lead screw 61 are rotatably connected to the sewage tank 1 via bearing seats, and both ends of the lead screw 61 extend out of the sewage tank 1. One end of the lead screw 61 is fixedly connected to a driven bevel gear 611, and a driving bevel gear 612 meshes with the outer side of the driven bevel gear 611. A stepper motor 613 is fixedly connected to the outer side of the driving bevel gear 612 and is fixedly connected to the sewage tank 1. The other end of the lead screw 61 is fixedly connected to a driving bevel gear 614, and a variable speed bevel gear 615 meshes with the outer side of the driving bevel gear 614. A transmission shaft 616 is fixedly connected to the inner side of the variable speed bevel gear 615. Both ends of the transmission shaft 616 are mounted on the sewage tank 1 via bearing seats, and fixed on the transmission shaft 616... A drive gear 617 is connected, and a drive rack 618 meshes with the outer side of the drive gear 617. The drive rack 618 is fixedly connected to one side of the replacement filter screen 7. A connecting plate 51 is fixedly connected to the movable filter screen 5. A rotating shaft 52 is fixedly connected to the inner side of the connecting plate 51. A sliding frame 53 is rotatably connected to the outer side of the rotating shaft 52. The rotating shaft 52 is mounted on the sliding frame 53 through a bearing seat. The sliding frame 53 is threadedly connected to the lead screw 61, and a limit bolt 54 is slidably connected to the end of the sliding frame 53 away from the lead screw 61. The limit bolt 54 is fixedly connected to the sewage tank 1. Support shafts 55 are fixedly connected to both sides of the end of the movable filter screen 5 away from the connecting plate 51. The bottom of the support shaft 55 abuts against a base 56. The base 56 is fixedly connected to the sliding frame 53. When the movable filter 5 needs cleaning, the stepper motor 613 drives the active bevel gear 612 to rotate. The rotation of the active bevel gear 612 drives the driven bevel gear 611 to rotate. The rotation of the driven bevel gear 611 drives the lead screw 61 to rotate. The rotation of the lead screw 61 drives the sliding frame 53 to move along the limit bolt 54. The movement of the sliding frame 53 drives the movable filter 5 to move. When the lead screw 61 rotates, the drive bevel gear 614 rotates synchronously. The rotation of the drive bevel gear 614 drives the variable speed bevel gear 615 to rotate. The rotation of the variable speed bevel gear 615 drives the transmission shaft 616 to rotate. The rotation of the transmission shaft 616 drives the drive gear 617 to rotate. The rotation of the drive gear 617 drives the drive rack 618 to move. The movement of the drive rack 618 drives the replacement filter 7 to move, thereby realizing the switching between the movable filter 5 and the replacement filter 7.

[0025] Example 3, see Figures 1-10Unlike Embodiment 2 described above, the flipping component 62 includes a movable gear 621, which is fixedly connected to one end of the rotating shaft 52. A movable rack 622 meshes with the outer side of the movable gear 621. A movable bolt 623 is slidably connected to the bottom of the movable rack 622 and is fixedly connected to one side of the sliding frame 53. A return spring 624 is fixedly connected to one end of the movable rack 622, and the end of the return spring 624 away from the movable rack 622 is fixedly connected to the sliding frame 53. The flipping component 62 also includes a support plate 625 and a fixed rack 626, with the outer side of the fixed rack 626 meshing with... There is a reversing gear 627, and a connecting shaft 628 is fixedly connected to the inner side of the reversing gear 627. The connecting shaft 628 is mounted on the sewage tank 1 through a bearing seat. A bracket 629 is fixedly connected to the connecting shaft 628. A backflushing pipe 63 is mounted on the bracket 629. A fixing bolt 6210 is slidably connected to the outer side of the fixing rack 626. The fixing bolt 6210 is fixedly connected to the inner side of the sewage tank 1. A connecting spring 6211 is fixedly connected to the fixing rack 626. The end of the connecting spring 6211 away from the fixing rack 626 is fixedly connected to the inner side of the sewage tank 1. When the support plate 625 moves, it can contact the fixing rack 626. When the movable filter screen 5 and the sliding frame 53 move, the movable gear 621, the movable rack 622, and the support plate 625 move along with the movable filter screen 5. After the movable rack 622 moves, it contacts the inner wall of the filter chamber 2. As the movable filter screen 5 moves, the inner wall of the filter chamber 2 presses against the movable rack 622. At this time, the movable rack 622 moves along the movable bolt 623 and presses the return spring 624. The movement of the movable rack 622 drives the movable gear 621 to rotate. The rotation of the movable gear 621 drives the rotating shaft 52 to rotate. The rotation of the rotating shaft 52 drives the connecting plate 51 to rotate. The rotation of the connecting plate 51 drives the movable filter screen 5 to rotate around the rotating shaft 52. At this time, the rotation of the movable filter screen 5 is completed. Since the sliding frame 53 has not yet moved into place, the lead screw 61 drives the movable filter screen 5 to continue moving, thereby moving the rotated movable filter screen 5 above the recycling basket 64. When the movable filter screen 5 moves, the support plate 625 and the fixed rack... 626 contacts and drives the fixed rack 626 to move along the fixed bolt 6210 and press the connecting spring 6211. The movement of the fixed rack 626 drives the flip gear 627 to rotate. The rotation of the flip gear 627 drives the connecting shaft 628 to rotate. The rotation of the connecting shaft 628 drives the bracket 629 to rotate around the connecting shaft 628. The rotation of the bracket 629 drives the backwash pipe 63 to rotate. At this time, the backwash pipe 63 is moved above the moving filter screen 5, thereby rinsing the moving filter screen 5 and rinsing the impurities in the moving filter screen 5 into the recovery basket 64. When the lead screw 61 reverses, the support plate 625 drives the flip gear 627 to flip and reset. At this time, the backwash pipe 63 resets. Then, as the lead screw 61 continues to reverse, the moving rack 622 separates from the filter chamber 2. At this time, the reset spring 624 drives the moving rack 622, the moving gear 621 and the moving filter screen 5 to reset, while the connecting spring 6211 drives the connecting shaft 628 to flip and reset.

[0026] Example 4, see Figures 1-10 Unlike the above embodiment 3, the filter chamber 2 has an opening, and a tray 21 is fixedly connected to the inside of the opening. The tray 21 is connected to the filter chamber 2. A limit rod 22 is fixedly connected to the tray 21. The replacement filter screen 7 is slidably connected to the limit rod 22. The bottom of the replacement filter screen 7 is provided with rollers. A stabilizing spring 23 is fixedly connected to the outside of the replacement filter screen 7. The end of the stabilizing spring 23 away from the replacement filter screen 7 is fixedly connected to the sewage tank 1. The replacement filter screen 7 has a discharge port. A connecting rod 72 is slidably connected to the replacement filter screen 7. One end of the connecting rod 72 passes through the replacement filter screen 7 and is fixedly connected to the filter plate 71. A limit spring 73 is fixedly connected to the connecting rod 72. The end of the limit spring 73 away from the connecting rod 72 is fixedly connected to the replacement filter screen 7. A push net 8 is fixedly connected to the inside of the filter chamber 2. A symmetrically distributed guide rod is fixedly connected to one side of the push net 8. In the initial state, the pusher 8 and guide rod squeeze the filter plate 71, thereby forcing the filter plate 71 into an open state. At this time, the discharge port on the replacement filter 7 is opened, and the limiting spring 73 is compressed. When the drive rack 618 moves, it drives the replacement filter 7 to move along the limiting rod 22. When the replacement filter 7 moves, the pusher 8 and guide rod gradually separate from the filter plate 71. At this time, under the action of the limiting spring 73, the filter plate 71 gradually returns to its original state, thereby closing the discharge port on the replacement filter 7, thus achieving the closure of the replacement filter 7. When the replacement filter 7 resets, as the replacement filter 7 moves, the pusher 8 pushes the impurities remaining in the replacement filter 7 toward the discharge port. Similarly, the guide rod squeezes the filter plate 71, thereby driving the filter plate 71 and connecting rod 72 to move. The moving connecting rod 72 squeezes the limiting spring 73. After the moving filter 5 resets, the pusher 8 pushes the impurities in the replacement filter 7 into the moving filter 5.

[0027] In actual use, the position and size of the replacement filter 7 can be adjusted as needed so that the replacement filter 7 can be seamlessly connected after the moving filter 5 is moved, and the replacement filter 7 can continuously filter sewage while the moving filter 5 is being moved and cleaned.

[0028] Example 5: A multi-stage treatment method for wetland chemical wastewater, which uses the above-mentioned multi-stage treatment equipment for wetland chemical wastewater.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage treatment device for wetland chemical wastewater, comprising a wastewater tank, wherein a filtration chamber, a sedimentation chamber, and a flocculation chamber are sequentially arranged within the wastewater tank, characterized in that: The filter chamber is equipped with a movable filter screen, a cleaning mechanism, and a water outlet pipe. The movable filter screen is used to filter sewage, and the water outlet pipe is used to discharge sewage. The cleaning mechanism includes a lead screw, a tilting component, a backwash pipe, and a collection basket. The lead screw is used to drive the moving filter screen to move, the tilting component is used to drive the moving filter screen to tilt, the backwash pipe is used to rinse the tilted moving filter screen, and the collection basket is used to collect impurities inside the moving filter screen. The filter chamber is also equipped with a replacement filter screen and a pusher screen. The replacement filter screen is equipped with a filter plate. The replacement filter screen is used to replace the moving filter screen after it moves. When the screw rotates, the replacement filter screen can move. The pusher screen is used to remove impurities from the replacement filter screen. The flipping component includes a moving gear, a moving rack, a support plate, a fixed rack, and a flipping gear; the moving gear is fixedly connected to one end of the rotating shaft of the moving filter and meshes with the moving rack; the support plate is connected to the moving filter and can move with it; The fixed rack meshes with the flipping gear, and the flipping gear is fixedly connected to the coupling shaft of the backflush tube. When the moving filter moves, the moving rack is driven by an external force to rotate the moving gear to achieve the flipping of the moving filter. At the same time, the support plate pushes the fixed rack to move, driving the flipping gear to rotate to achieve the flipping of the backflush tube. The lead screw has two states: forward rotation and reverse rotation. During the forward rotation phase, the lead screw drives the movable filter screen to move towards the recycling basket. Then, the flipping component forces the movable filter screen to flip until the inner bottom surface of the movable filter screen is opposite to the recycling basket. After the movable filter screen flips, the flipping component drives the backwash pipe to flip above the movable filter screen. During the operation of the lead screw, the replacement filter screen can move towards the outlet pipe. At this time, the filter plate closes, sealing the replacement filter screen. During the reversal phase, the flipping component sequentially drives the backflushing tube and the moving filter to flip and reset. Then, the lead screw drives the moving filter to reset. During the reset of the moving filter, the pusher can scrape off the impurities in the replacement filter. After the moving filter is reset, the pusher can open the filter plate. At this time, the pusher can push the impurities in the replacement filter into the moving filter.

2. The wetland chemical wastewater multi-stage treatment equipment according to claim 1, characterized in that: The two ends of the lead screw are rotatably connected to the sewage tank through bearing seats, and the two ends of the lead screw extend out of the sewage tank. One end of the lead screw is fixedly connected to a driven bevel gear, and a driving bevel gear meshes with the outer side of the driven bevel gear. A stepper motor is fixedly connected to the outer side of the driving bevel gear, and the stepper motor is fixedly connected to the sewage tank.

3. The wetland chemical wastewater multi-stage treatment equipment according to claim 2, characterized in that: The other end of the lead screw is fixedly connected to a drive bevel gear. A speed-changing bevel gear meshes with the outer side of the drive bevel gear. A transmission shaft is fixedly connected to the inner side of the speed-changing bevel gear. Both ends of the transmission shaft are mounted on the sewage tank through bearing seats. A drive gear is fixedly connected to the transmission shaft. A drive rack meshes with the outer side of the drive gear. The drive rack is fixedly connected to one side of the replacement filter screen.

4. The wetland chemical wastewater multi-stage treatment equipment according to claim 3, characterized in that: A connecting plate is fixedly connected to the movable filter screen. A rotating shaft is fixedly connected to the inner side of the connecting plate. A sliding frame is rotatably connected to the outer side of the rotating shaft. The rotating shaft is mounted on the sliding frame through a bearing seat. The sliding frame is threadedly connected to the lead screw. A limit bolt is slidably connected to the end of the sliding frame away from the lead screw. The limit bolt is fixedly connected to the sewage tank. Support shafts are fixedly connected to both sides of the end of the movable filter screen away from the connecting plate. The bottom of the support shaft abuts against a base. The base is fixedly connected to the sliding frame.

5. The wetland chemical wastewater multi-stage treatment equipment according to claim 4, characterized in that: A movable bolt is slidably connected to the bottom of the movable rack, and the movable bolt is fixedly connected to one side of the sliding frame. A return spring is fixedly connected to one end of the movable rack, and the end of the return spring away from the movable rack is fixedly connected to the sliding frame.

6. The wetland chemical wastewater multi-stage treatment equipment according to claim 5, characterized in that: A fixing bolt is slidably connected to the outside of the fixing rack, and the fixing bolt is fixedly connected to the inside of the sewage tank. A connecting spring is fixedly connected to the fixing rack, and the end of the connecting spring away from the fixing rack is fixedly connected to the inside of the sewage tank. When the support plate moves, it can contact the fixing rack.

7. A multi-stage wetland chemical wastewater treatment equipment according to claim 6, characterized in that: The filter chamber has an opening, and a tray is fixedly connected to the inside of the opening. The tray communicates with the filter chamber. A limit rod is fixedly connected to the tray. The replacement filter screen is slidably connected to the limit rod. A roller is provided at the bottom of the replacement filter screen. A stabilizing spring is fixedly connected to the outside of the replacement filter screen. The end of the stabilizing spring away from the replacement filter screen is fixedly connected to the sewage tank.

8. A multi-stage wetland chemical wastewater treatment equipment according to claim 7, characterized in that: The replacement filter screen has a discharge port, and a connecting rod is slidably connected to the replacement filter screen. One end of the connecting rod passes through the replacement filter screen and is fixedly connected to the filter plate. A limit spring is fixedly connected to the connecting rod, and the end of the limit spring away from the connecting rod is fixedly connected to the replacement filter screen. The push screen is fixedly connected to the inside of the filter chamber, and symmetrically distributed guide rods are fixedly connected to one side of the push screen.

9. A multi-stage wetland chemical wastewater treatment equipment according to claim 8, characterized in that: The recycling basket is connected to the filter chamber, and the recycling basket has a built-in barrier net. A conveying pump is installed inside the filter chamber, and the backwash pipe is connected to the conveying pump.

10. A multi-stage treatment method for wetland chemical wastewater, characterized in that: The wetland chemical wastewater multi-stage treatment equipment as described in any one of claims 1-9 was used.

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