A multi-stage treatment system for leather production wastewater

Abstract

The application discloses a kind of leather production wastewater multistage processing system, it is related to wastewater treatment technical field, including jar body, the stirring paddle is rotatably arranged in the jar body, the communicating pipe of several annular distributions is fixedly connected in the jar body bottom, further include, flow guide component, including rotatingly arranged in communicating pipe inside flow guide vane, one end of the flow guide vane is fixedly connected with docking shaft, the docking sleeve is slidably connected in the jar body, the flow guide component further includes the drive mechanism being arranged in the inside of jar body bottom end, the present application uses stirring equipment as the transfer equipment of wastewater precipitation, wastewater after preliminary filtering impurities is fully stirred and mixed with chemical agent, then the mixed wastewater is rapidly guided to the inside of sedimentation tank, i.e. it can be handled every time after leather processing, avoid the unpleasant smell generated due to grease and protein deterioration in wastewater when wastewater is concentrated.

Description

Technical Field

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

[0002] Leather wastewater treatment requires a combination of physicochemical and biological methods. Pretreatment uses screens and equalization tanks to remove suspended solids, followed by the addition of chemical agents to the pretreated wastewater to further generate sediment. To reduce the cost of these agents, companies typically store the wastewater in large sedimentation tanks before adding chemicals in batches. During this temporary storage, grease and protein in the leather wastewater rapidly decompose, releasing malodorous gases such as hydrogen sulfide, leading to environmental degradation and the risk of secondary pollution. If a transfer reaction tank is used to treat the wastewater in real time, it faces the technical bottleneck of excessively fast sedimentation rates. Existing pumping systems cannot complete the wastewater transfer within the sedimentation window, resulting in sediment accumulation in the reaction tank.

[0003] Based on this, the present invention designs a multi-stage wastewater treatment system for leather production to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-stage wastewater treatment system for leather production to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage wastewater treatment system for leather production, comprising a tank, wherein a stirring paddle is rotatably disposed inside the tank, and a plurality of annularly distributed connecting pipes are fixedly connected to the bottom of the tank, and further comprising,

[0006] A connecting pipe is rotatably disposed on the outside of the connecting pipe and fixedly connected to the connecting pipe via a flexible hose. The drain end of the connecting pipe is slidably connected to an elastic element. In the wastewater mixing state, the drain end of the connecting pipe is tilted upward and the elastic element is closed with the connecting pipe. In the mixed drainage state, the drain end of the connecting pipe is tilted downward and the elastic element is slidably opened relative to the connecting pipe.

[0007] The flow guiding assembly includes a flow guiding fan blade rotatably disposed inside the connecting pipe, one end of which is fixedly connected to a docking shaft, and a docking sleeve slidably connected inside the tank. The flow guiding assembly also includes a drive mechanism disposed at the bottom of the tank for driving the docking sleeve to rotate and adjusting the docking sleeve to dock with the docking shaft so that the docking sleeve drives the docking shaft to rotate.

[0008] As a further embodiment of the present invention, a sliding shaft is rotatably connected to the right end of the guide fan blade, a push rod is fixedly connected to the right end of the sliding shaft, a second rotating pair is rotatably connected to the right end of the push rod and the bottom of the connecting pipe, a first rotating pair is rotatably connected to the right end of the push rod and the cover, an elastic element is fixedly connected to the outside of the connecting pipe, the output end of the elastic element is fixedly connected to the cover, a rotating frame is fixedly connected to the outer wall of the tank, and the right end of the rotating frame is rotatably connected to the connecting pipe.

[0009] As a further embodiment of the present invention, the driving mechanism includes a sealing base, which is fixed to the inner wall of the bottom end of the tank. A second bevel gear is rotatably connected to the top of the sealing base. The second bevel gear passes through the sealing base and is fixedly connected to the stirring paddle. A plurality of annularly distributed first bevel gears meshing with the second bevel gear are rotatably connected inside the sealing base. A connecting shaft is provided outside the sealing base for fixedly connecting with the rotation center of the first bevel gear. One end of the connecting shaft is slidably connected to a docking sleeve. A bearing is fixedly sleeved on the docking sleeve. A transmission plate slidably disposed inside the tank is rotatably sleeved outside the bearing. A scraping component for cleaning the inner wall of the connecting pipe is provided inside the connecting pipe.

[0010] As a further embodiment of the present invention, the scraping assembly includes a fixed shaft, the fixed shaft being slidably sleeved on the outside of the sliding shaft, a fixed bracket being fixedly connected inside the connecting tube, the fixed shaft being rotatably sleeved inside the fixed bracket, an incomplete gear being fixedly connected to the fixed shaft, a fixed frame being fixedly connected to the inner wall of the connecting tube, a transmission gear for meshing with the incomplete gear being rotatably connected inside the fixed frame, a lever being fixedly connected to the rotation center of the transmission gear, a dial being rotatably connected to the fixed frame for meshing with the lever, and a rotating rod rotatably connected inside the connecting tube and rotatably connected to the dial.

[0011] As a further embodiment of the present invention, a connecting pipe is fixedly connected to the outside of the connecting pipe, and a ball valve is fixedly connected to the top of the connecting pipe.

[0012] As a further embodiment of the present invention, a stirring motor is fixedly connected inside the sealing base, and the output shaft of the stirring motor is fixedly connected to the rotation center of the bottom end of the bevel gear.

[0013] As a further embodiment of the present invention, the docking end of the docking shaft and the docking sleeve is conical, and the outer wall of the docking shaft can be completely fitted with the inner wall of the docking sleeve.

[0014] As a further embodiment of the present invention, a fixed bracket is fixedly connected inside the communicating pipe, and the fixed shaft is rotatably sleeved inside the fixed bracket.

[0015] As a further embodiment of the present invention, a drive motor is fixedly connected to the connecting pipe, and the output end of the drive motor is fixedly connected to the transmission plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention uses a stirring device as a transfer device for wastewater sedimentation. The wastewater, after preliminary filtration of impurities, is thoroughly mixed with chemical agents, and then the mixed wastewater is quickly guided into the sedimentation tank. This allows for timely treatment after each leather processing, avoiding the unpleasant odors caused by the deterioration of oils and proteins in the wastewater during centralized wastewater treatment. At the same time, the guiding device prevents the formation of sediment in the wastewater inside the transfer device, allowing the wastewater and chemical agents to be fully mixed and flow quickly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the front structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the tank body of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the sealed base;

[0022] Figure 5 This is a schematic diagram of the flow guiding component structure;

[0023] Figure 6 This is a schematic diagram of the internal structure of the connecting pipe (with the rotating rod hidden).

[0024] Figure 7 for Figure 6 Enlarged structural diagram at point A in the middle;

[0025] Figure 8 This is a schematic diagram of the internal structure of a connecting pipe;

[0026] Figure 9 This is a schematic diagram illustrating the docking process between the docking sleeve and the docking shaft.

[0027] Figure 10 This is a schematic diagram of the internal structure of the connecting pipe and the butt joint pipe;

[0028] Figure 11 A schematic diagram of the structure for opening the cover when the manhole cover is turned.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Tank body; 2. Agitator; 3. Hoses; 4. Connecting pipe; 5. Connecting pipe; 6. Sealing base; 7. Agitator motor; 8. Bevel gear one; 9. Bevel gear two; 10. Connecting shaft; 11. Transmission plate; 12. Connecting sleeve; 13. Drive motor; 14. Connecting shaft; 15. Bearing; 16. Guide fan blade; 17. Fixed shaft; 18. Fixed bracket; 19. Incomplete gear; 20. Lever; 21. Transmission gear; 22. Dial; 23. Fixed frame; 24. Rotating rod; 25. Sliding shaft; 26. Push rod; 27. Rotating pair one; 28. Rotating pair two; 29. ​​Cover; 30. Rotating frame; 31. Elastic element one; 32. Filter plate; 33. Wastewater pipe; 34. Chemical pipe; 35. Filter frame. Detailed Implementation

[0031] Please see Figure 1-10 This invention provides a technical solution: a multi-stage wastewater treatment system for leather production, comprising a tank 1, an agitator 2 rotatably mounted inside the tank 1, and several annularly distributed connecting pipes 4 fixedly connected to the bottom of the tank 1, and further comprising...

[0032] A connecting pipe 5, which is rotatably disposed outside the connecting pipe 4 and fixedly connected to the connecting pipe 4 via a flexible hose 3, has an elastic element 31 slidably connected to its drain end. In the wastewater mixing state, the drain end of the connecting pipe 5 is tilted upwards and the elastic element 31 is closed to the connecting pipe 5. In the mixed drainage state, the drain end of the connecting pipe 5 is tilted downwards and the elastic element 31 slides open relative to the connecting pipe 5. (See also...) Figure 1 When wastewater and chemical agents are added to the tank 1 to react, when a certain connecting pipe 4 is opened to discharge wastewater, the corresponding connecting pipe 5 will tilt downward to form a guiding effect; while the connecting pipes 5 on the other connecting pipes 4 remain tilted upward, which can effectively prevent sewage from remaining inside the connecting pipe 5 and forming sediment.

[0033] The flow guiding assembly includes a flow guiding fan blade 16 rotatably disposed inside the connecting pipe 4. One end of the flow guiding fan blade 16 is fixedly connected to a docking shaft 14. A docking sleeve 12 is slidably connected inside the tank body 1. The flow guiding assembly also includes a drive mechanism disposed at the bottom of the tank body 1 for driving the docking sleeve 12 to rotate and adjusting the docking sleeve 12 to dock with the docking shaft 14 so that the docking sleeve 12 drives the docking shaft 14 to rotate.

[0034] See Figures 1-5Wastewater from leather processing flows through wastewater pipe 33 into filter frame 35. After preliminary filtration of solid impurities by filter plate 32, it is added into tank 1. At the same time, chemical agents are added into tank 1 through chemical agent pipe 34. The stirring paddle 2 rotates to fully mix the wastewater and chemical agents. The mixed wastewater then flows to sedimentation tank through connecting pipe 4. During this process, the flow guiding component drives the docking sleeve 12 to connect with the flow guiding fan blade 16, so that the stirring paddle 2 drives the flow guiding fan blade 16 to rotate through the docking sleeve 12. The rotation of the flow guiding fan blade 16 generates a spiral to propel the wastewater. The purpose of this rapid flow is to add tank 1 as a transfer medium for mixing wastewater and chemical agents before the leather wastewater reacts and settles. This allows even small amounts of leather wastewater to form sediment within the sedimentation tank, unlike traditional leather wastewater treatment which concentrates wastewater from multiple leather processing processes in a single sedimentation tank. This reduces the phenomenon of protein deterioration and foul odor in untreated leather wastewater. Furthermore, the flow guiding component allows the wastewater and chemical agents mixed inside tank 1 to flow rapidly into the sedimentation tank, preventing the formation of sediment within tank 1.

[0035] As a further embodiment of the present invention, the right end of the guide fan blade 16 is rotatably connected to a sliding shaft 25, the right end of the sliding shaft 25 is fixedly connected to a push rod 26, the right end of the push rod 26 and the bottom of the connecting pipe 5 are rotatably connected to a rotating pair 28, the right end of the push rod 26 and the cover 29 are rotatably connected to a rotating pair 27, an elastic element 31 is fixedly connected to the outside of the connecting pipe 5, the output end of the elastic element 31 is fixedly connected to the cover 29, and a rotating frame 30 is fixedly connected to the outer wall of the tank body 1, the right end of the rotating frame 30 is rotatably connected to the connecting pipe 5;

[0036] See Figures 10-11 When the docking shaft 14 drives the guide fan blade 16 to slide to the right, the sliding shaft 25 will push the push rod 26 to slide synchronously. Since the right end of the push rod 26 is connected to the bottom of the docking pipe 5 by a rotating joint 28, the docking pipe 5 will generate Figure 11 As shown in the diagram, the right end of the push rod 26 will simultaneously disengage the cover 29 from the closed right end of the connecting pipe 5 via the rotating joint 27, opening the right side of the connecting pipe 5, thereby achieving the effect of draining water through the connecting pipe 5. The purpose of this is that, in the non-draining state, when the connecting pipe 5 is tilted upwards and other connecting pipes 5 are opened, the wastewater inside the closed connecting pipe 5 can flow back, avoiding the formation of sediment; when the connecting pipe 5 is opened, the connecting pipe 5 automatically switches to the downward tilting state to guide the wastewater.

[0037] As a further embodiment of the present invention, the driving mechanism includes a sealing base 6, which is fixed to the inner wall of the bottom end of the tank 1. A bevel gear 9 is rotatably connected to the top end of the sealing base 6. The bevel gear 9 passes through the sealing base 6 and is fixedly connected to the stirring paddle 2. A plurality of bevel gears 8 arranged in a ring and meshing with the bevel gears 9 are rotatably connected inside the sealing base 6. A connecting shaft 10 is provided on the outside of the sealing base 6 for fixedly connecting with the rotation center of the bevel gears 8. One end of the connecting shaft 10 is slidably connected to the docking sleeve 12, and a bearing is fixedly sleeved on the docking sleeve 12. 15. The bearing 15 is externally rotatably sleeved with a transmission plate 11 that is slidably disposed inside the tank body 1. The connecting pipe 4 is provided with a scraping component for cleaning the inner wall of the connecting pipe 4. The sealing base 6 is internally fixedly connected with a stirring motor 7. The output shaft of the stirring motor 7 is fixedly connected to the bottom rotation center of the bevel gear 9. The connecting pipe 4 is fixedly connected with a drive motor 13. The output end of the drive motor 13 is fixedly connected to the transmission plate 11. The docking shaft 14 and the docking sleeve 12 are tapered. The outer wall of the docking shaft 14 can completely fit with the inner wall of the docking sleeve 12.

[0038] See Figures 3-5 After wastewater and chemical agents are added into tank 1, the stirring motor 7 is started to drive the bevel gear 9 and the stirring paddle 2 to rotate. The stirring paddle 2 mixes the materials. When the bevel gear 9 rotates, it drives several bevel gears 8 to rotate synchronously. The bevel gears 8 drive the docking sleeve 12 to rotate through the connecting shaft 10. The drive motor 13 drives the transmission plate 11 to slide. The transmission plate 11 drives the docking sleeve 12 to slide relative to the connecting shaft 10 through the bearing 15, so that the docking sleeve 12 gradually contacts the docking shaft 14. Since the docking end of the docking shaft 14 and the docking sleeve 12 is conical, when the docking sleeve 12 rotates and gradually slides to dock with the docking shaft 14, the docking sleeve 12 can be sleeved on the outside of the docking shaft 14 and drive the docking shaft 14 to rotate together (e.g., Figure 9 As shown in the figure, the connecting shaft 14 drives the guide fan blade 16 to rotate. The spiral generated by the rotation of the guide fan blade 16 pushes the wastewater, allowing the wastewater to pass quickly along the connecting pipe 4, so that the wastewater that has reacted with the chemical agent enters the sedimentation tank to generate sediment.

[0039] As a further embodiment of the present invention, the scraping assembly includes a fixed shaft 17, which is fixedly connected to the guide fan blade 16. An incomplete gear 19 is fixedly connected to the fixed shaft 17. A fixed frame 23 is fixedly connected to the inner wall of the connecting pipe 4. A transmission gear 21 for meshing with the incomplete gear 19 is rotatably connected inside the fixed frame 23. A lever 20 is fixedly connected to the rotation center of the transmission gear 21. A dial 22 for meshing with the lever 20 is rotatably connected to the fixed frame 23. A rotating rod 24 rotatably connected to the dial 22 is rotatably connected inside the connecting pipe 4.

[0040] See Figures 6-8 When the guide fan blade 16 rotates to generate a spiral, the guide fan blade 16 will drive the fixed shaft 17 to rotate together. The fixed shaft 17 will drive the incomplete gear 19 to rotate. When the incomplete gear 19 meshes with the transmission gear 21, it will drive the transmission gear 21 to rotate. The transmission gear 21 will drive the lever 20 to rotate synchronously. The lever 20 will then drive the dial 22 to rotate. The dial 22 will then drive the rotating rod 24 to rotate. The rotating rod 24 scrapes away the sediment attached to the inner wall of the connecting pipe 4 during the flow of wastewater, which can effectively prevent blockage inside the connecting pipe 4. Moreover, through the intermittent transmission from the incomplete gear 19 to the transmission gear 21, and then to the intermittent transmission from the lever 20 to the dial 22, the rotational speed of the fixed shaft 17 can be greatly reduced, so that the rotational speed of the dial 22 relative to the fixed shaft 17 can be greatly reduced, avoiding wear on the inside of the connecting pipe 4 caused by the rotation of the rotating rod 24.

[0041] As a further embodiment of the present invention, a connecting pipe 5 is fixedly connected to the outside of the connecting pipe 4, and a ball valve 3 is fixedly connected to the top of the connecting pipe 5.

[0042] See Figure 1 The ball valve 3 controls the closure of the connecting pipe 5, so that when one of the connecting pipes 5 needs to be opened to discharge wastewater, the other connecting pipes 5 can be controlled to close.

[0043] As a further embodiment of the present invention, a fixed bracket 18 is fixedly connected inside the connecting pipe 4, and the fixed shaft 17 is rotatably sleeved inside the fixed bracket 18.

[0044] The fixed bracket 18 supports the guide fan blade 16, enabling the guide fan blade 16 to rotate stably inside the connecting pipe 4.

[0045] Working principle: After preliminary filtration of solid impurities, the wastewater generated from leather processing is added to the tank 1. Simultaneously, chemical agents are added to the tank 1. The stirring motor 7 is activated, driving the bevel gear 9 and the stirring paddle 2 to rotate. The stirring paddle 2 mixes the wastewater. The rotation of bevel gear 9 drives several bevel gears 8 to rotate synchronously. The bevel gears 8, through the connecting shaft 10, drive the docking sleeve 12 to rotate. The drive motor 13 drives the transmission plate 11 to slide. The transmission plate 11, through the bearing 15, drives the docking sleeve 12 to slide relative to the connecting shaft 10, causing the docking sleeve 12 to gradually contact the docking shaft 14. Since the docking end of the docking shaft 14 and the docking sleeve 12 is conical, when the docking sleeve 12 rotates and gradually slides to dock with the docking shaft 14, the docking sleeve 12 can be properly fitted. The connecting shaft 14 rotates outside the connecting shaft 14, causing the connecting shaft 14 to rotate as well. This causes the guiding fan blade 16 to rotate, and the spiral generated by the rotating guiding fan blade 16 pushes the wastewater through the connecting pipe 4. When the guiding fan blade 16 rotates and generates a spiral, it drives the fixed shaft 17 to rotate as well. The fixed shaft 17 drives the incomplete gear 19 to rotate. When the incomplete gear 19 meshes with the transmission gear 21, it drives the transmission gear 21 to rotate. The transmission gear 21 drives the lever 20 to rotate synchronously. The lever 20 then drives the dial 22 to rotate, and the dial 22 then drives the rotating rod 24 to rotate. The rotating rod 24 scrapes away the sediment that adheres to the inner wall of the connecting pipe 4 during the flow of wastewater, effectively preventing blockage inside the connecting pipe 4.

Claims

1. A multi-stage wastewater treatment system for leather production, comprising a tank (1), wherein a stirring paddle (2) is rotatably disposed inside the tank (1), characterized in that: The tank body (1) has several annularly distributed connecting pipes (4) fixedly connected to its bottom. It also includes a connecting pipe (5) rotatably disposed outside the connecting pipes (4) and fixedly connected to the connecting pipes (4) via a flexible hose (3). The drain end of the connecting pipe (5) is slidably connected to an elastic element (31). In the wastewater mixing state, the drain end of the connecting pipe (5) is tilted upwards and the elastic element (31) is closed to the connecting pipe (5). In the mixed drainage state, the drain end of the connecting pipe (5) is tilted downwards and the elastic element (31) is closed to the connecting pipe (5). The connecting pipe (5) is slidably opened; the flow guiding assembly includes a flow guiding fan blade (16) rotatably disposed inside the connecting pipe (4), one end of the flow guiding fan blade (16) is fixedly connected to the docking shaft (14), the tank body (1) is slidably connected to the docking sleeve (12), and the flow guiding assembly also includes a drive mechanism disposed at the bottom of the tank body (1) for driving the docking sleeve (12) to rotate and adjusting the docking sleeve (12) to dock with the docking shaft (14) so ​​that the docking sleeve (12) drives the docking shaft (14) to rotate; The right end of the guide fan blade (16) is rotatably connected to a sliding shaft (25), the right end of the sliding shaft (25) is fixedly connected to a push rod (26), the right end of the push rod (26) and the bottom of the connecting pipe (5) are rotatably connected to a rotating pair two (28), the right end of the push rod (26) and the cover (29) are rotatably connected to a rotating pair one (27), the outside of the connecting pipe (5) is fixedly connected to an elastic element one (31), the output end of the elastic element one (31) is fixedly connected to the cover (29), the outer wall of the tank body (1) is fixedly connected to a rotating frame (30), the right end of the rotating frame (30) is rotatably connected to the connecting pipe (5); The driving mechanism includes a sealing base (6), which is fixed to the inner wall of the bottom end of the tank (1). A bevel gear two (9) is rotatably connected to the top of the sealing base (6). The bevel gear two (9) passes through the sealing base (6) and is fixedly connected to the stirring paddle (2). Several bevel gears one (8) distributed in a ring and meshing with the bevel gears two (9) are rotatably connected inside the sealing base (6). A connecting shaft (10) is provided on the outside of the sealing base (6) for fixedly connecting with the rotation center of the bevel gears one (8). One end of the connecting shaft (10) is slidably connected to the docking sleeve (12). A bearing (15) is fixedly sleeved on the docking sleeve (12). A transmission plate (11) slidably disposed inside the tank (1) is rotatably sleeved on the outside of the bearing (15). A scraping component for cleaning the inner wall of the connecting pipe (4) is provided inside the connecting pipe (4).

2. The multi-stage wastewater treatment system for leather production according to claim 1, characterized in that: The scraping assembly includes a fixed shaft (17), which is slidably sleeved on the outside of a sliding shaft (25). A fixed bracket (18) is fixedly connected inside the connecting pipe (4). The fixed shaft (17) is rotatably sleeved inside the fixed bracket (18). An incomplete gear (19) is fixedly connected on the fixed shaft (17). A fixed frame (23) is fixedly connected on the inner wall of the connecting pipe (4). A transmission gear (21) for meshing with the incomplete gear (19) is rotatably connected inside the fixed frame (23). A lever (20) is fixedly connected to the rotation center of the transmission gear (21). A dial (22) for meshing with the lever (20) is rotatably connected on the fixed frame (23). A rotating rod (24) rotatably connected to the dial (22) is rotatably connected inside the connecting pipe (4).

3. The multi-stage wastewater treatment system for leather production according to claim 1, characterized in that: A ball valve is fixedly connected to the top of the connecting pipe (5).

4. The multi-stage wastewater treatment system for leather production according to claim 1, characterized in that: The sealing base (6) is fixedly connected to a stirring motor (7), and the output shaft of the stirring motor (7) is fixedly connected to the bottom rotation center of the bevel gear (9).

5. A multi-stage wastewater treatment system for leather production according to claim 1, characterized in that: The docking shaft (14) and the docking sleeve (12) are tapered at the docking end, and the outer wall of the docking shaft (14) can be completely fitted with the inner wall of the docking sleeve (12).

6. The multi-stage wastewater treatment system for leather production according to claim 1, characterized in that: A drive motor (13) is fixedly connected to the connecting pipe (4), and the output end of the drive motor (13) is fixedly connected to the transmission plate (11).

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