A multi-stage starch glue wastewater treatment and recycling device

Abstract

The application provides a starch glue wastewater multistage treatment and recycling device, and relates to the technical field of sewage treatment.The device comprises a rack support and an electric control controller, the upper end of the rack support is provided with a water treatment unit, a plurality of conveyor belt type filtering structures are arranged in the water treatment unit, the electric control controller is used for controlling the starting of a servo drive motor, the servo drive motor drives corresponding conveying rollers through a shaft coupling to rotate, the conveying roller structures which are arranged in four groups, one unit, and parallel on the upside and staggered on the downside drive the filter screen conveying belt to continuously and circularly run, and the plurality of conveyor belt type filtering structures in the water treatment unit are synchronously and cooperatively operated, the low-position conveying roller is attached to the water flow path at the sewage end, can continuously and stably intercept and filter the sewage, effectively solves the problems of poor attachment of the filter screen of the traditional sewage treatment, intermittent filtration, and insufficient impurity interception, so that continuous and uninterrupted filtration operation of the sewage is realized, and the sewage treatment flux and the filtration stability are greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and more specifically, relates to a multi-stage treatment and reuse device for starch glue wastewater. Background Technology

[0002] Starch glue wastewater is industrial wastewater generated during the production and processing of starch glue. The water contains a large amount of starch colloids, suspended impurities, and organic pollutants. It is characterized by high impurity content, easy siltation, and difficulty in treatment. Starch glue wastewater treatment is an important process in industrial wastewater treatment. It mainly targets the wastewater generated by starch glue production to intercept and purify impurities. Continuous filtration capacity and sufficient impurity interception are the key to ensuring stable wastewater treatment throughput and purification effect.

[0003] According to the Chinese patent with publication number CN120589981B, the multi-stage wastewater treatment device sequentially achieves the effects of wastewater filtration, stripping aeration, flocculation and sedimentation separation, thereby cleaning and separating impurities and harmful substances in the wastewater and achieving the effect of multi-stage purification treatment.

[0004] Based on the above search and existing technology findings, the above patent has certain defects: the device only uses a conventional fixed filtration structure to complete the wastewater impurity purification treatment, and lacks a continuous circulating dynamic filtration structure. In the actual wastewater treatment process, the traditional filter screen has poor adhesion to the water flow, which easily leads to intermittent filtration operations and insufficient impurity interception. It cannot achieve uninterrupted continuous filtration operations, and the wastewater treatment throughput and filtration stability are limited, making it difficult to ensure the uniformity of the initial purification of the water body. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a multi-stage treatment and reuse device for starch glue wastewater.

[0006] A multi-stage treatment and reuse device for starch glue wastewater includes a frame support and an electrical control controller. The electrical control controller is located on the side of the frame support. A water treatment unit is provided at the upper end of the frame support. A primary liquid inlet unit and a secondary electrically controlled liquid outlet unit are fixedly connected to the front and rear ends of the water treatment unit, respectively. An upper sealing cover is provided at the upper end of the frame support.

[0007] Preferably, the water treatment unit is equipped with multiple conveyor belt filtration structures, each including multiple conveyor rollers. A filter conveyor belt is wound between each group of conveyor rollers. Multiple servo drive motors are fixedly installed on the side wall of the water treatment unit. Each servo drive motor is fixedly installed with one of the conveyor rollers in each group via a coupling. The conveyor rollers are arranged in groups of four and are rotatably installed inside the water treatment unit via waterproof bearings. The distribution of each group of conveyor rollers is two upper conveyor rollers and two lower conveyor rollers, with the two upper conveyor rollers parallel to each other and the lower conveyor rollers at different heights, with the lower side of the conveyor roller facing the wastewater end. When the equipment is running, the electronic controller controls the servo drive motors to start, which drive the corresponding conveyor rollers to rotate, thereby driving the filter conveyor belt to continuously circulate. Multiple conveyor belt filtration structures work synchronously, and with the staggered arrangement of the conveyor rollers, they conform to the wastewater flow path, continuously intercepting and filtering the starch glue wastewater entering the water treatment unit, trapping solid impurities in the water, and completing the preliminary purification of the wastewater.

[0008] Preferably, a multi-functional pneumatic structure is fixedly installed on the upper end of the frame support by hexagonal screws. The multi-functional pneumatic structure includes a piston cylinder. The front and rear ends of the piston cylinder are respectively provided with a one-way exhaust valve pipeline and a one-way intake valve pipeline. A pressure-bearing piston plate is sealed and slidably installed inside the piston cylinder. A transmission piston rod is fixedly installed on the side wall of the pressure-bearing piston plate, and the pressure-bearing piston plate and the piston cylinder are sealed and slidably installed. A swing frame is symmetrically fixedly installed on the side wall of the transmission piston rod. An eccentric connecting handle is symmetrically fixedly installed on the side wall of one of the conveying rollers in each group. A primary eccentric pin is eccentrically fixedly installed on the side wall of each eccentric connecting handle. A primary transmission connecting rod is rotatably installed among the multiple primary eccentric pins. A secondary transmission connecting rod is fixedly installed on the side wall of the primary transmission connecting rod. An eccentric pin is used, and a secondary transmission link is rotatably mounted on the outer side of the secondary eccentric pin. The two secondary transmission links, on the side away from the secondary eccentric pin, are rotatably mounted on a transmission main shaft via bearings. The transmission main shaft and the swing frame on the transmission piston rod are rotatably mounted via bearings. During the operation of the conveyor belt filter structure, the rotating conveyor roller drives the eccentric connecting handle to rotate synchronously. Through the sequential linkage of the primary eccentric pin, primary transmission link, secondary eccentric pin and secondary transmission link, the transmission main shaft drives the swing frame to move, converting the rotational motion into the reciprocating linear motion of the transmission piston rod. This causes the pressure-bearing piston plate to slide back and forth in a sealed manner inside the piston cylinder. With the cooperation of the one-way exhaust valve pipeline and the one-way intake valve pipeline, the equipment can continuously and adaptively circulate air in and out, providing stable pneumatic power for the auxiliary structures of the whole machine.

[0009] Preferably, a friction-type cleaning structure and a negative pressure collection integrated structure are provided between the multi-functional pneumatic structure and the conveyor belt filter structure. The friction-type cleaning structure and the negative pressure collection integrated structure include a primary transmission gear. Each set of conveyor rollers is distributed with two upper conveyor rollers and two lower conveyor rollers. The primary transmission gear is symmetrically fixedly installed on the side wall of one of the upper conveyor rollers. Multiple negative pressure dust collection half-hoods are fixedly installed on the upper end of the frame support using hexagonal screws. The negative pressure dust collection half-hoods are located inside the upper sealing cover. Filter cleaning rollers are rotatably installed inside the negative pressure dust collection half-hoods. Secondary transmission gears are symmetrically fixedly installed on the side walls of the filter cleaning rollers. The primary and secondary transmission gears mesh outside the water treatment unit and the upper sealing cover. Pneumatic quick-connect fittings are symmetrically provided around the negative pressure dust collection half-hoods. A primary negative pressure pipeline assembly is fixedly connected to the two one-way air inlet valve pipelines. An electrically controlled pressure regulating air inlet valve and an air source filter tank are provided around the primary negative pressure pipeline assembly. The air source filter tank is located inside the electrically controlled pressure regulating inlet valve. A secondary negative pressure pipeline assembly is fixedly connected to the pneumatic quick-connect fittings. This secondary negative pressure pipeline assembly is fixedly connected to the electrically controlled pressure regulating inlet valve via a cyclone dust separator. A dust collection cylinder is located at the upper end of the frame support. The cyclone dust separator and the dust collection cylinder are connected via a double external thread corrugated pipe thread. When the conveying roller rotates, it drives the primary transmission gear to rotate coaxially. Through meshing with the secondary transmission gear, it drives the filter cleaning roller relative to the filter screen conveyor. The conveyor belt rotates in the reverse direction, rubbing and peeling off the starch glue wastewater impurities adhering to the filter screen surface and collecting them inside the negative pressure dust collection half-hood. At the same time, the multi-functional pneumatic structure generates a stable negative pressure air source. After being purified by the air source filter tank and stabilized by the electrically controlled pressure regulating air inlet valve, the negative pressure airflow is formed through the first-stage negative pressure pipeline assembly, the cyclone dust-air separator and the second-stage negative pressure pipeline assembly. This airflow extracts the collected impurities and completes the gas-solid separation. Finally, the solid impurities are transported to the dust collection cylinder for centralized storage, realizing the integrated operation of automatic filter screen cleaning and negative pressure impurity collection.

[0010] Preferably, the water treatment unit is equipped with a reflux treatment structure, which includes a secondary liquid inlet unit, a primary electrically controlled liquid outlet unit, and a liquid reflux pipeline. The secondary liquid inlet unit is fixedly connected to the front end of the frame support, and the primary electrically controlled liquid outlet unit is fixedly connected to the side wall of the water treatment unit. The liquid reflux pipeline is fixedly connected between the secondary liquid inlet unit and the primary electrically controlled liquid outlet unit. A pressure output pipeline is fixedly connected to one of the one-way air outlet valve pipelines. The pressure output pipeline and the liquid reflux pipeline are fixedly connected through a Venturi jet mixer. After the equipment completes a single wastewater filtration, the secondary liquid inlet unit and the primary electrically controlled liquid outlet unit are opened. The starch glue wastewater that has been initially filtered inside the water treatment unit can flow back to the secondary liquid inlet unit through the liquid reflux pipeline and re-enter the water treatment unit for multiple cycles of purification. At the same time, the high-pressure gas output by the multi-functional pneumatic structure is introduced into the Venturi jet mixer through the pressure output pipeline, using the Venturi effect to provide transport power for the water reflux, ensuring stable operation of the reflux circulation and effectively improving the cleanliness of the wastewater treatment.

[0011] Preferably, the water treatment unit has a centralized aeration structure, which includes multiple aeration units. Each aeration unit is located on the side wall of the water treatment unit, on both sides of the filter conveyor belt near the wastewater end. The aeration holes of the aeration units face the center of the filter conveyor belt. Each aeration unit has an air supply and inlet pipe on its back, which extends to the outside of the water treatment unit through a waterproof sleeve. The ends of the air supply and inlet pipes are all fixedly connected to a multi-way connecting pipe assembly, one of which is a unidirectional air outlet. The valve pipeline is equipped with a pipeline conversion joint, which is fixedly connected to the multi-way interconnected pipeline assembly. During equipment operation, excess high-pressure gas discharged from the multi-functional pneumatic structure is introduced into the multi-way interconnected pipeline assembly through the pipeline conversion joint. After being diverted and stabilized, it is delivered to each group of air supply and inlet pipelines. Finally, the aeration unit sprays aeration airflow toward the center of the filter screen conveyor belt to oxidize and decompose organic pollutants in the wastewater. At the same time, it disperses viscous starch impurities on the surface of the filter screen, improves the permeability of the filter screen and the wastewater purification efficiency, and works with each structure to complete the integrated sewage treatment operation.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In this invention, the servo drive motor is started by the electronic controller, which drives the corresponding conveyor roller to rotate through the coupling. This, in conjunction with the four sets of conveyor rollers arranged in a unit with parallel upper sides and staggered lower sides, drives the filter conveyor belt to circulate continuously. At the same time, multiple conveyor belt filter structures inside the water treatment unit work in sync. The lower conveyor rollers are aligned with the water flow path towards the sewage end, which can continuously and stably intercept and filter the sewage. This effectively solves the problems of poor filter fit, intermittent filtration, and insufficient impurity retention in traditional sewage treatment. As a result, continuous and uninterrupted sewage filtration is achieved, which greatly improves the sewage treatment throughput and filtration stability, and ensures the uniformity of the initial purification of the water.

[0013] In this invention, an eccentric connecting handle is provided on the side wall of the upper conveying roller. The rotation of the conveying roller drives the first-stage eccentric pin, the first-stage transmission link, the second-stage eccentric pin, and the second-stage transmission link in a coordinated transmission. Then, the transmission piston rod is driven to reciprocate through the transmission main shaft connected to the swing frame. This drives the pressure-bearing piston plate to slide in a sealed manner inside the piston cylinder. With the cooperation of the one-way air outlet valve pipeline and the one-way air inlet valve pipeline, adaptive continuous air intake and exhaust can be achieved. This can directly convert the rotational mechanical energy of the filter structure into the reciprocating power of the pneumatic structure, improving the synchronization and automation of the equipment operation.

[0014] In this invention, the upper conveyor roller drives the primary transmission gear to rotate coaxially. The primary transmission gear and the secondary transmission gear on the filter cleaning roller mesh in opposite directions, driving the filter cleaning roller to rotate in the opposite direction relative to the filter conveyor belt and continuously rub against the belt surface. This mechanically peels off and cleans the solid impurities and sludge deposited on the surface of the filter conveyor belt. This effectively solves the problems of traditional sewage treatment filters accumulating impurities and clogging during long-term operation, as well as the cumbersome and incomplete manual cleaning process. Thus, it realizes the automated reverse friction cleaning operation of the filter conveyor belt, continuously ensuring the permeability of the filter, avoiding clogging of the filter pores and affecting the filtration efficiency, and effectively extending the overall service life of the filter.

[0015] In this invention, a stable negative pressure air source is generated through a multi-functional pneumatic structure. This air source is then filtered by an air source filter to purify impurities. An electrically controlled pressure regulating inlet valve continuously adjusts the negative pressure airflow pressure and flow rate to ensure stable suction. A complete negative pressure airflow channel is formed by a primary negative pressure pipeline assembly, a cyclone dust separator, and a secondary negative pressure pipeline assembly. A negative pressure dust collection half-hood is used to initially collect impurities after friction stripping. The stable negative pressure airflow extracts internal impurities and transports them to the cyclone dust separator for gas-solid separation. The separated solid impurities are then guided into a dust collection cylinder for centralized storage via a double-threaded corrugated pipe. This effectively solves the problems of traditional filters causing impurities to easily disperse, resulting in secondary dust pollution, and the inability to centrally collect and process impurities. This achieves automated negative pressure dust collection and integrated processing of cleaning impurities, ensuring a clean operating environment and improving the overall automation performance of the equipment.

[0016] In this invention, a closed-loop reflux channel is formed by a two-stage liquid inlet unit, a first-stage electrically controlled liquid outlet unit, and a liquid return pipeline. This allows the water that has undergone preliminary filtration inside the water treatment unit to be recirculated back to the equipment's inlet for multiple cycles of filtration. Combined with a pressure output pipeline connected to a one-way air outlet valve and a Venturi jet mixer, the high-pressure gas output by the pneumatic structure provides continuous power for the water reflux. This enables secondary and multiple deep purifications of water that fails to meet standards in a single treatment, effectively solving the problems of low single-stage filtration and purification accuracy, high levels of residual impurities, and substandard treatment quality in traditional wastewater treatment. This significantly improves the cleanliness of wastewater treatment, adapts to the treatment of high-impurity wastewater, and enhances the equipment's adaptability to wastewater treatment.

[0017] In this invention, a pipeline conversion joint is set up through a one-way air outlet valve to connect to a multi-way interconnected pipeline assembly. The excess high-pressure gas generated by the operation of the multi-functional pneumatic structure is diverted, stabilized, and then transported to each group of air supply and inlet pipelines. It is then introduced into the aeration unit inside the water treatment unit, so that the aeration unit is directionally aerated towards the center of the filter conveyor belt. This can make full use of the equipment's surplus pneumatic energy to oxidize and decompose organic pollutants in sewage while breaking up viscous impurities on the filter screen surface. This effectively solves the problems of traditional aeration equipment requiring independent air supply, serious energy waste, difficulty in cleaning viscous impurities on the filter screen, and rapid decline in filtration efficiency. Thus, waste gas can be reused, the energy consumption of equipment operation can be reduced, and the sewage purification effect and filter screen filtration efficiency can be improved. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of a partial assembly structure of the present invention; Figure 3 This is a schematic diagram of the combined structure of the cyclone dust-gas separator of the present invention; Figure 4This is a schematic diagram of the combined structure of the water treatment unit of the present invention; Figure 5 This is a three-dimensional structural diagram of the piston cylinder of the present invention; Figure 6 This is a schematic diagram of the piston-cylinder assembly structure of the present invention; Figure 7 This is a schematic diagram of the two-stage transmission connecting rod assembly structure of the present invention; Figure 8 This is a schematic diagram of the negative pressure dust collection half-cover assembly structure of the present invention; Figure 9 This is a cross-sectional view of the water treatment unit of the present invention.

[0019] In the diagram, the correspondence between component names and attached drawing numbers is as follows: 11. Frame support; 12. Electrical controller; 13. Water treatment unit; 14. Conveyor roller; 15. Filter conveyor belt; 16. Servo drive motor; 17. Piston cylinder; 18. Pressure-bearing piston plate; 19. Transmission piston rod; 21. Swinging frame; 22. Eccentric connecting handle; 23. First-stage eccentric pin; 24. First-stage transmission connecting rod; 25. Second-stage eccentric pin; 26. Second-stage transmission connecting rod; 27. Transmission main shaft; 28. First-stage liquid inlet unit; 29. ​​Second-stage liquid inlet unit; 31. First-stage electrically controlled liquid outlet unit; 32. Second-stage electrically controlled liquid outlet unit; 33. Liquid return pipeline; 34. One-way exhaust valve pipeline; 35. One-way intake valve pipeline; 36. Pressure output pipeline; 37. Venturi jet mixer; 38. Aeration unit; 39. Air supply and intake pipeline; 41. Pipeline conversion joint; 42. Multi-way connecting pipeline assembly; 43. Primary transmission gear; 44. Filter cleaning roller; 45. Upper sealing cover; 46. Secondary transmission gear; 47. Negative pressure dust collection half-hood; 48. Pneumatic quick-connect coupling; 49. Primary negative pressure pipeline assembly; 51. Electrically controlled pressure regulating intake valve; 52. Secondary negative pressure pipeline assembly; 53. Cyclone dust-air separator; 54. Dust collection cylinder; 55. Double external thread corrugated pipe; 56. Air source filter tank. Detailed Implementation

[0020] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0021] Please see Figure 1 - Figure 9This invention provides a multi-stage treatment and reuse device for starch glue wastewater, including a frame support 11 and an electrical controller 12. The electrical controller 12 is located on the side of the frame support 11. The frame support 11 is a structure formed by integral bending and welding of Q235 carbon steel, and the whole is treated with hot-dip galvanizing for corrosion protection and electrostatic powder coating. It has the characteristics of rust prevention, resistance to sewage corrosion, and strong load-bearing stability, and is suitable for long-term underwater high humidity, acid and alkaline sewage corrosion, and dusty operation scenarios. The electrical controller 12 is located on the side of the frame support 11 and is an IP65 waterproof, dustproof and explosion-proof electrical control box. The box is made of die-cast aluminum alloy and the surface is treated with anti-corrosion oxidation treatment. The internal components are treated with glue for waterproofing, and it is suitable for high humidity, dust accumulation and other conditions in sewage workshops. For mild corrosion conditions, a water treatment unit 13 is installed at the upper end of the frame support 11. The water treatment unit 13 is a 316L stainless steel integral stamped and welded cavity structure. The inner wall is polished and anti-sticking, and the outer wall is coated with anti-corrosion coating. It is resistant to acid and alkali sewage corrosion and scale adhesion, and is suitable for long-term immersion sewage filtration operation. The front and rear ends of the water treatment unit 13 are respectively fixedly connected to the primary liquid inlet unit 28 and the secondary electronically controlled liquid outlet unit 32. The upper end of the frame support 11 is equipped with an upper sealing cover plate 45. The upper sealing cover plate 45 is a composite structure of tempered glass and 304 stainless steel frame. The contact surface is inlaid with aging-resistant fluororubber sealing gaskets. It has the characteristics of waterproof, dustproof, corrosion-proof and excellent sealing performance, and is suitable for high humidity dust sewage operation environment.

[0022] The water treatment unit 13 internally houses multiple conveyor belt filtration structures, each including multiple conveyor rollers 14. These rollers are solid 316L stainless steel, with precision grinding, polishing, and anti-corrosion passivation treatment. Both ends of the rollers are waterproof and sealed, ensuring resistance to sewage corrosion, rust prevention, and low rotational damping, making them suitable for continuous underwater operation. A filter conveyor belt 15 is wound between each set of conveyor rollers 14. This belt is made of high-strength, thickened polyester filter material, a current technology, with a PTFE anti-corrosion and anti-stick coating. It possesses the characteristics of water permeability, impurity filtration, resistance to sewage corrosion, anti-sludge adhesion, and wear and tensile strength, making it suitable for high-impurity, highly corrosive sewage filtration scenarios. The side walls of the water treatment unit 13 are also equipped with... Multiple servo drive motors 16 are fixedly installed. The servo drive motors 16 are IP68 fully waterproof servo motors with cast aluminum anti-corrosion housings and stainless steel anti-rust treatment on the output shafts. They are suitable for continuous operation in harsh conditions such as underwater and high humidity and dust. Each servo drive motor 16 is fixedly installed with one of the conveyor rollers 14 in each group of conveyor rollers 14 through a coupling. The conveyor rollers 14 are in groups of four and are rotatably installed inside the water treatment unit 13 through waterproof bearings. The distribution of each group of conveyor rollers 14 is two conveyor rollers 14 at the top and two conveyor rollers 14 at the bottom. The two conveyor rollers 14 at the top are parallel to each other, and the two conveyor rollers 14 at the bottom are of different heights, with the lower conveyor roller 14 facing the sewage end.

[0023] The servo drive motor 16 is started by the electronic controller 12, which drives the corresponding conveyor roller 14 to rotate through the coupling. The four sets of conveyor rollers 14 arranged in a unit with parallel upper sides and staggered lower sides drive the filter conveyor belt 15 to continuously circulate. At the same time, multiple conveyor belt filter structures inside the water treatment unit 13 work in sync. The lower conveyor roller 14 is aligned with the water flow path towards the sewage end, which can continuously and stably intercept and filter the sewage. This effectively solves the problems of poor filter screen fit, intermittent filtration, and insufficient impurity interception in traditional sewage treatment. As a result, continuous and uninterrupted sewage filtration is achieved, which greatly improves the sewage treatment throughput and filtration stability and ensures the uniformity of the initial purification of the water.

[0024] A multi-functional pneumatic structure is fixedly mounted on the upper end of the frame support 11 using hexagonal screws. This multi-functional pneumatic structure includes a piston cylinder 17, which is made of hard anodized aluminum alloy with a high-precision honed inner wall, resistant to air pressure wear and oxidation corrosion, suitable for long-term reciprocating pneumatic operation. The piston cylinder 17 has a one-way exhaust valve pipe 34 and a one-way intake valve pipe 35 at both its front and rear ends. Both the one-way exhaust valve pipe 34 and the one-way intake valve pipe 35 are made of PU corrosion-resistant high-pressure pneumatic hard tubing, paired with stainless steel quick-connect fittings, resistant to air pressure impact, water vapor corrosion, and not prone to aging and cracking, suitable for high-humidity pneumatic circulation scenarios. A pressure-bearing piston plate 18 is sealed and slidably mounted inside the piston cylinder 17. The pressure-bearing piston plate 18 is made of aluminum alloy with an outer polyurethane wear-resistant sealing ring. The plate surface is treated with anti-corrosion spraying, making it wear-resistant, sealing, resistant to air pressure deformation, and resistant to water vapor corrosion. It is suitable for high-frequency reciprocating sliding conditions inside the cylinder. A transmission piston rod 19 is fixedly installed on the side wall of the pressure-bearing piston plate 18. The transmission piston rod 19 is a 40Cr tempered chrome-plated precision piston rod with a hard chrome plating layer that is wear-resistant and corrosion-resistant, and has high straightness. It is suitable for high-frequency reciprocating telescopic transmission conditions. The pressure-bearing piston plate 18 and the piston cylinder 17 are sealed and slidably installed. A swing frame 21 is symmetrically fixedly installed on the side wall of the transmission piston rod 19. The swing frame 21 is a 304 stainless steel bent frame with overall passivation and anti-corrosion treatment. It has high structural strength and is resistant to water vapor corrosion. Each set One of the conveyor rollers 14 has symmetrically fixedly mounted eccentric connecting handles 22 on its side wall. The eccentric connecting handles 22 are made of 45# steel with a tempered and galvanized structure, making them wear-resistant, deformation-resistant, rust-proof, and corrosion-resistant, suitable for high-speed eccentric linkage transmission. Each eccentric connecting handle 22 has a primary eccentric pin 23 eccentrically fixedly mounted on its side wall. The primary eccentric pin 23 is made of stainless steel with a hardened and polished surface, making it wear-resistant, shear-resistant, and rust-proof, suitable for high-frequency rotational friction. Multiple primary eccentric pins 23 are rotatably connected by a primary transmission link 24. The primary transmission link 24 is a high-strength carbon steel stamped link with an anti-corrosion powder-coated surface, exhibiting high toughness and resistance to deformation, suitable for reciprocating oscillating transmission. A secondary eccentric pin 25 is fixedly installed on the side wall of the transmission connecting rod 24. The secondary eccentric pin 25 and the primary eccentric pin 23 are made of the same stainless steel quenched and polished material, which is wear-resistant, corrosion-resistant and has high transmission accuracy. A secondary transmission connecting rod 26 is rotatably installed on the outer side of the secondary eccentric pin 25. The transmission main shaft 27 is rotatably installed at the end position of the two secondary transmission connecting rods 26 away from the secondary eccentric pin 25 through bearings. The transmission main shaft 27 is rotatably installed on the swing bracket 21 on the transmission piston rod 19 through bearings. The secondary transmission connecting rod 26 adopts the same carbon steel anti-corrosion structure as the primary transmission connecting rod 24, with consistent structural strength, and is suitable for linkage reciprocating and resetting adjustment. The transmission main shaft 27 is a solid stainless steel shaft, which is heat-treated for wear resistance and corrosion resistance.

[0025] By setting an eccentric connecting handle 22 on the side wall of the upper conveying roller 14, the rotation of the conveying roller 14 drives the first-stage eccentric pin 23, the first-stage transmission connecting rod 24, the second-stage eccentric pin 25, and the second-stage transmission connecting rod 26 to drive the transmission. Then, the transmission piston rod 19 is driven to reciprocate through the transmission main shaft 27 connected to the swing frame 21, which in turn drives the pressure-bearing piston plate 18 to slide in a sealed manner inside the piston cylinder 17. With the cooperation of the one-way air outlet valve pipeline 34 and the one-way air inlet valve pipeline 35, adaptive continuous air intake and exhaust can be achieved. The rotational mechanical energy of the filter structure can be directly converted into the reciprocating power of the pneumatic structure, improving the synchronization and automation of equipment operation.

[0026] Between the multi-functional pneumatic structure and the conveyor belt filter structure, there is a friction cleaning structure and a negative pressure collection integrated structure. The friction cleaning structure and the negative pressure collection integrated structure include a primary transmission gear 43, which is a 45# steel quenched hobbing gear with galvanized anti-corrosion treatment. The tooth surface is wear-resistant and pressure-resistant, suitable for long-term meshing transmission and high-humidity dust conditions. Each set of conveyor rollers 14 is distributed with two upper conveyor rollers 14 and two lower conveyor rollers 14. The primary transmission gear 43 is symmetrically fixed on the side wall of one of the upper conveyor rollers 14. Multiple negative pressure dust collection half-covers 47 are fixedly installed on the upper end of the frame bracket 11 with hexagonal screws. The negative pressure dust collection half-covers 47 are made of transparent PC flame-retardant and anti-corrosion material. The unit is integrally injection molded, resistant to aging and water vapor corrosion, and allows for easy observation of the internal dust collection status. It is suitable for mixed wastewater and dust conditions. The negative pressure dust collection half-hood 47 is located inside the upper sealing cover 45. A filter cleaning roller 44 is rotatably installed inside the negative pressure dust collection half-hood 47. The filter cleaning roller 44 is made of 304 stainless steel roller shaft with high-temperature and wear-resistant nylon bristles. The roller shaft is rust-proof, and the bristles are wear-resistant and corrosion-resistant, making it suitable for long-term friction cleaning of the filter screen and high-humidity wastewater and dust scenarios. A secondary transmission gear 46 is symmetrically fixed on the side wall of the filter cleaning roller 44. The secondary transmission gear 46 is made of the same material and process as the primary transmission gear 43, with matching meshing precision and wear resistance and corrosion resistance. The primary transmission gear 43 and the secondary transmission gear 46 are located outside the water treatment unit 13 and the upper sealing cover 45. The parts engage, and the negative pressure dust collection half-hood 47 is symmetrically equipped with pneumatic quick-connect connectors 48. The pneumatic quick-connect connectors 48 are copper-plated nickel anti-corrosion quick-connect connectors, with good airtightness and resistance to oxidation and corrosion. The two one-way air inlet valve pipelines 35 are fixedly connected to a primary negative pressure pipeline assembly 49. The primary negative pressure pipeline assembly 49 is a rigid PVC anti-corrosion negative pressure pipeline, which is resistant to negative pressure deformation and water vapor and dust corrosion. The primary negative pressure pipeline assembly 49 is equipped with an electrically controlled pressure regulating air inlet valve 51 and an air source filter canister 56. The air source filter canister 56 is located inside the electrically controlled pressure regulating air inlet valve 51. The electrically controlled pressure regulating air inlet valve 51 is a stainless steel anti-corrosion pressure regulating valve body with a wear-resistant and sealed valve core, which is suitable for precise control of negative pressure airflow and high humidity dust prevention conditions. The air source filter canister 56 is a transparent acrylic anti-corrosion canister. It has a built-in stainless steel precision filter element, which can filter water vapor and impurities, and is suitable for negative pressure air source purification scenarios. The pneumatic quick-connect connectors 48 are fixedly connected to the secondary negative pressure pipeline assembly 52. ​​The secondary negative pressure pipeline assembly 52 and the primary negative pressure pipeline assembly 49 use the same PVC corrosion-resistant negative pressure pipeline, which is suitable for stable delivery of negative pressure airflow. The secondary negative pressure pipeline assembly 52 and the electrically controlled pressure regulating air inlet valve 51 are fixedly connected through the cyclone dust-air separator 53. The cyclone dust-air separator 53 is a PP anti-corrosion one-piece molded structure, which is resistant to water vapor, dust erosion, and corrosion, and is suitable for gas-solid separation operation scenarios. The upper end of the frame support 11 is equipped with a dust collection cylinder 54. The cyclone dust-air separator 53 and the dust collection cylinder 54 are connected by a double external thread corrugated pipe 55.

[0027] The upper conveyor roller 14 drives the primary transmission gear 43 to rotate coaxially. The primary transmission gear 43 and the secondary transmission gear 46 on the filter cleaning roller 44 mesh in opposite directions, driving the filter cleaning roller 44 to rotate in the opposite direction relative to the filter conveyor belt 15 and continuously rub against the belt surface. This mechanically peels off and cleans the solid impurities and sludge deposited on the surface of the filter conveyor belt 15. This effectively solves the problems of traditional sewage treatment filters accumulating impurities and clogging during long-term operation, as well as the cumbersome and incomplete manual cleaning operation. Thus, it realizes the automated reverse friction cleaning operation of the filter conveyor belt 15, continuously ensuring the permeability of the filter, avoiding clogging of the filter pores and affecting the filtration efficiency, and effectively extending the overall service life of the filter.

[0028] A stable negative pressure air source is generated through the operation of a multi-functional pneumatic structure. The air source filter tank 56 is used to purify the negative pressure air source for impurities. The electrically controlled pressure regulating inlet valve 51 regulates the negative pressure airflow pressure and flow rate in real time to ensure stable negative pressure suction. A complete negative pressure airflow channel is formed by the first-stage negative pressure pipeline assembly 49, the cyclone dust separator 53, and the second-stage negative pressure pipeline assembly 52. ​​The negative pressure dust collection half-hood 47 is used to initially collect the impurities after friction stripping. The stable negative pressure airflow extracts the internal impurities and transports them to the cyclone dust separator 53 to complete gas-solid separation. The separated solid impurities are introduced into the dust collection cylinder 54 through the double external thread corrugated pipe 55 for centralized storage. This effectively solves the problems of easy dispersion of impurities, secondary dust pollution, and inability to centrally collect and process impurities in traditional filter cleaning. This achieves automated negative pressure dust collection and integrated processing of cleaning impurities, ensuring a clean operating environment and improving the overall automated operation performance of the equipment.

[0029] The water treatment unit 13 is equipped with a reflux treatment structure, which includes a secondary liquid inlet unit 29, a primary electrically controlled liquid outlet unit 31, and a liquid reflux pipeline 33. The liquid reflux pipeline 33 is a seamless 316L stainless steel pipeline with a polished inner wall to prevent scale adhesion, resistance to acid and alkali wastewater corrosion, and suitable for long-term water circulation. The secondary liquid inlet unit 29 is fixedly connected to the front end of the frame support 11, the primary electrically controlled liquid outlet unit 31 is fixedly connected to the side wall of the water treatment unit 13, and the liquid reflux pipeline 33 is located on the secondary liquid inlet unit 29. It is fixedly connected to the first-level electronically controlled liquid outlet unit 31. One of the one-way air outlet valves 34 is fixedly connected to a pressure output pipe 36. The pressure output pipe 36 is a high-pressure corrosion-resistant pneumatic pipe that is resistant to air pressure impact and water vapor corrosion. The pressure output pipe 36 and the liquid return pipe 33 are fixedly connected through a Venturi jet mixer 37. The Venturi jet mixer 37 is a 316L stainless steel precision casting structure with a smooth and wear-resistant flow channel, resistant to gas-liquid mixing erosion, and corrosion-resistant, and is suitable for gas-liquid mixing pressurization and return conditions.

[0030] The secondary liquid inlet unit 29, the primary electrically controlled liquid outlet unit 31, and the liquid return pipeline 33 form a closed-loop return channel, allowing the water that has undergone preliminary filtration inside the water treatment unit 13 to be returned to the equipment inlet for multiple cycles of filtration. In conjunction with the pressure output pipeline 36 connected to the one-way air outlet valve pipeline 34 and the Venturi jet mixer 37, the high-pressure gas output by the pneumatic structure provides continuous transport power for the water return, enabling secondary and multiple deep purification of water that does not meet the standards after a single treatment. This effectively solves the problems of low single-stage filtration and purification accuracy, high water impurity residue, and substandard treatment quality in traditional sewage treatment, thereby significantly improving the cleanliness of sewage treatment, adapting to the treatment conditions of high-impurity sewage, and enhancing the equipment's adaptability to sewage treatment.

[0031] The water treatment unit 13 is equipped with a centralized aeration structure, which includes multiple aeration units 38. Each aeration unit 38 is located on the side wall of the water treatment unit 13, on both sides of the filter conveyor belt 15 near the sewage end. The aeration holes of the aeration units 38 face the center of the filter conveyor belt 15. The aeration units 38 are titanium alloy microporous aeration heads, with uniform and wear-resistant micropores, resistant to strong sewage corrosion, and not easily clogged, making them suitable for long-term sewage aeration operations. Each aeration unit 38 has an air supply and inlet pipe 39 on its back, which extends to the outside of the water treatment unit 13 through a waterproof sleeve. The air supply and inlet pipe 39 is a PE corrosion-resistant rigid air pipe, which is anti-aging. It is resistant to corrosion and water vapor, and is not easily deformed. The air supply and intake pipe 39 extends to the outside of the water treatment unit 13 through a waterproof sleeve. The waterproof sleeve is a silicone waterproof sealing sleeve, which is resistant to high and low temperatures and corrosion. The ends of the air supply and intake pipe 39 are fixedly connected to a multi-way connecting pipe assembly 42. The multi-way connecting pipe assembly 42 is a rigid pipe with an anodized surface treatment, which has good air tightness and is resistant to air pressure corrosion. It is suitable for high-pressure gas diversion and stabilization conditions. One of the one-way air outlet pipes 34 is equipped with a pipe conversion joint 41. The pipe conversion joint 41 is fixedly connected to the multi-way connecting pipe assembly 42. The pipe conversion joint 41 is a stainless steel anti-corrosion conversion joint with excellent sealing performance and high pressure and corrosion resistance.

[0032] By connecting the multi-way connecting pipeline assembly 42 with the pipeline conversion joint 41 set by the one-way air outlet valve pipeline 34, the excess high-pressure gas generated by the operation of the multi-functional pneumatic structure is diverted, stabilized and delivered to each group of air supply and inlet pipelines 39, and then introduced into the aeration unit 38 inside the water treatment unit 13. The aeration unit 38 is directed towards the center of the filter conveyor belt 15 for directional aeration, which can make full use of the equipment's surplus pneumatic energy to oxidize and decompose organic pollutants in sewage and break up sticky impurities on the filter screen surface. This effectively solves the problems of traditional aeration equipment that requires independent air supply, serious energy waste, difficulty in cleaning sticky impurities on the filter screen and rapid decline in filtration efficiency. Thus, waste gas can be reused, the energy consumption of equipment operation can be reduced, and the sewage purification effect and filter screen filtration efficiency can be improved.

[0033] Working principle: In the first step, during equipment operation, the operator issues a start command via the electrical controller 12 located on the side of the frame support 11. The electrical controller 12 then controls the servo drive motor 16 mounted on the side wall of the water treatment unit 13 to start synchronously. The servo drive motor 16 establishes a power connection with the corresponding group of individual conveyor rollers 14 through a coupling, thereby driving the conveyor roller 14 to rotate. Each filter structure is equipped with four conveyor rollers 14, which are rotatably mounted inside the water treatment unit 13 via waterproof bearings. The two groups of upper conveyor rollers 14 are arranged in parallel, while the two groups of lower conveyor rollers 14 are arranged in a staggered manner, with one high and one low. The lower conveyor roller 14 faces the sewage inlet. At the working end, multiple sets of conveyor rollers 14 are tensioned together to wind the filter conveyor belt 15. The rotating conveyor rollers 14 can drive the filter conveyor belt 15 to rotate continuously. Multiple sets of independent conveyor belt filter structures are arranged inside the water treatment unit 13. The multiple filter structures operate synchronously and can continuously intercept and filter the sewage entering the water treatment unit 13. Solid impurities in the sewage are trapped on the surface of the filter conveyor belt 15. The water penetrates the filter conveyor belt 15 to complete the initial purification. The layout of the conveyor rollers 14 arranged in parallel above and staggered below can ensure that the filter conveyor belt 15 fits the sewage flow path and continuously maintains a stable sewage filtration operation.

[0034] In the second step, while the conveyor belt filter structure continues to operate, the rotating upper conveyor roller 14 drives the eccentric connecting handles 22, which are symmetrically fixed on the side wall, to rotate synchronously. The eccentric connecting handles 22 form a rotational engagement with the primary transmission link 24 through the primary eccentric pin 23 eccentrically fixed at the end, thereby driving the primary transmission link 24 to continuously swing. The secondary eccentric pin 25 fixed on the side wall of the primary transmission link 24 is rotatably connected to the secondary transmission link 26. The swinging motion of the primary transmission link 24 is transmitted to the secondary transmission link 26 through the secondary eccentric pin 25, driving the secondary transmission link 26 to produce reciprocating displacement adjustment. The ends of the two sets of secondary transmission links 26 are connected to the transmission main shaft 27 through bearings. The swing frame 21, which is fixed to the side wall of the transmission piston rod 19, forms a bearing rotation engagement to constrain the rotation, thereby continuously converting the circumferential rotation of the conveying roller 14 into the horizontal reciprocating linear motion of the transmission piston rod 19. The transmission piston rod 19 is rigidly fixed to the pressure-bearing piston plate 18, which is sealed and slidably installed inside the piston cylinder 17. While the transmission piston rod 19 reciprocates, it drives the pressure-bearing piston plate 18 to perform sealed reciprocating sliding inside the piston cylinder 17. The piston cylinder 17 is connected to a one-way exhaust valve pipe 34 and a one-way intake valve pipe 35 on the front and rear sides, respectively. When the pressure-bearing piston plate 18 slides forward and backward, the piston cylinder 17 will continuously and adaptively perform intake and exhaust circulation.

[0035] Thirdly, during the rotation of the upper conveyor roller 14, it synchronously drives the primary transmission gear 43, which is symmetrically fixed on its side wall, to rotate coaxially. The primary transmission gear 43 and the secondary transmission gear 46, which is fixed on the side wall of the filter cleaning roller 44, form a meshing transmission engagement on the outside of the water treatment unit 13 and the upper sealing cover plate 45. The negative pressure dust collection half-cover 47 is fixedly installed on the upper end of the frame support 11 and located inside the upper sealing cover plate 45. The filter cleaning roller 44 is rotatably assembled in the inner cavity of the negative pressure dust collection half-cover 47. Under the action of meshing transmission, The primary transmission gear 43 drives the secondary transmission gear 46 to rotate in the opposite direction, which in turn drives the filter cleaning roller 44 to rotate in the opposite direction relative to the filter conveyor belt 15. The rotating filter cleaning roller 44 continuously rubs against the surface of the filter conveyor belt 15, mechanically cleaning and peeling off the solid impurities and sludge adhering to the surface of the filter conveyor belt 15. The radial force generated during the cleaning process can scrape off the peeled impurities outward, causing them to fall into the internal cavity of the negative pressure dust collection half-hood 47 for initial collection. At the same time, the multi-functional pneumatic structure... During operation, a stable negative pressure air source is generated. The primary negative pressure pipeline assembly 49 is sequentially equipped with an electrically controlled pressure regulating inlet valve 51 and an air source filter tank 56. The air source filter tank 56 filters and purifies the negative pressure air source to remove impurities. The electrically controlled pressure regulating inlet valve 51 regulates the pressure and flow rate of the negative pressure airflow in real time to ensure stable negative pressure suction. The primary negative pressure pipeline assembly 49 is connected to the secondary negative pressure pipeline assembly 52 through a cyclone dust separator 53. The secondary negative pressure pipeline assembly 52 is connected to the negative pressure dust collection half-hood 47 through pneumatic quick-connect fittings 48 symmetrically arranged around the half-hood. With the cavity 47 connected, a stable negative pressure airflow draws out the impurities collected inside the negative pressure dust collection half-hood 47. The impurity airflow is introduced into the cyclone dust-gas separator 53 via the secondary negative pressure pipeline assembly 52. ​​The cyclone dust-gas separator 53 separates the gas-solid mixture. The separated solid impurities are introduced into the dust collection cylinder 54 located at the upper end of the frame support 11 through the double external thread corrugated pipe 55 for centralized storage. The separated airflow is returned to the pneumatic pipeline for recycling, thus fully realizing the integrated operation of friction cleaning and negative pressure collection of filter impurities.

[0036] Fourthly, after the water treatment unit 13 completes the single-batch wastewater filtration and purification operation through the primary inlet unit 28, it can activate the reflux treatment structure to perform secondary or multiple deep purification treatments on the water. The front end of the frame support 11 is fixedly connected to the secondary inlet unit 29, and the side wall of the water treatment unit 13 is fixedly connected to the primary electrically controlled outlet unit 31. The secondary inlet unit 29 and the primary electrically controlled outlet unit 31 are fixedly connected through the liquid reflux pipeline 33 to form a complete reflux channel. After the operator opens the secondary inlet unit 29 and the primary electrically controlled outlet unit 31, the purified water inside the water treatment unit 13, which has undergone preliminary filtration and is located near the secondary electrically controlled outlet unit 32, can flow into the liquid reflux pipeline 33 through the primary electrically controlled outlet unit 31, and then be transported to the secondary inlet unit 29 via the liquid reflux pipeline 33. Inside Yuan 29, the wastewater is recirculated back into the water treatment unit 13 to participate in secondary filtration and purification, effectively improving the cleanliness of the treated wastewater. At the same time, the one-way vent valve pipe 34 on the side wall of the piston cylinder 17 is fixedly connected to the pressure output pipe 36. A Venturi jet mixer 37 is installed between the pressure output pipe 36 and the liquid return pipe 33. The high-pressure gas generated by the continuous reciprocating operation of the multi-functional pneumatic structure is stably input into the pressure output pipe 36 through the one-way vent valve pipe 34. The high-pressure gas is fully mixed with the return water inside the liquid return pipe 33 through the Venturi jet mixer 37. The Venturi effect is used to provide continuous transport power for the water return circulation, effectively improving the water return rate and circulation stability, ensuring the continuous and efficient operation of the return treatment structure, and realizing multiple circulation purification treatment of wastewater.

[0037] Fifth, during the overall operation of the equipment, excess high-pressure gas continuously discharged by the multi-functional pneumatic structure can be stably discharged through the pipe conversion joint 41 mounted on the side wall of the one-way air outlet valve pipe 34. The pipe conversion joint 41 is fixedly connected to the multi-way connecting pipe assembly 42. The multi-way connecting pipe assembly 42 performs diversion and pressure stabilization treatment on the introduced high-pressure gas, and evenly distributes the gas to the inside of each group of air supply and inlet pipes 39. Each group of aeration units 38 is correspondingly arranged on the side wall of the water treatment unit 13 and on both sides of the filter conveyor belt 15 near the sewage inlet end. The air supply and inlet pipes 39 extend through the waterproof sleeve into the inside of the water treatment unit 13 and connect with the aeration unit. Units 38 are connected, and high-pressure gas is delivered to the corresponding aeration unit 38 through the air supply inlet pipe 39. The aeration holes of the aeration unit 38 are all oriented towards the central working area of ​​the filter conveyor belt 15. The high-pressure gas is continuously and directionally sprayed through the aeration holes to form an aeration airflow, which performs centralized aeration on the surface of the filter conveyor belt 15 and the surrounding sewage. The aeration effect can oxidize and decompose organic pollutants in the sewage, and at the same time disperse the viscous impurities attached to the filter surface, which helps to improve the filtration permeability and sewage purification efficiency of the filter conveyor belt 15. In conjunction with the filtration, cleaning and return structure, the integrated sewage treatment operation is completed simultaneously.

[0038] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A multi-stage treatment and reuse device for starch glue wastewater, comprising a frame support (11) and an electrical control controller (12), wherein a water treatment unit (13) is provided at the upper end of the frame support (11), and an upper sealing cover plate (45) is provided at the upper end of the frame support (11), characterized in that: The water treatment unit (13) is equipped with multiple conveyor belt filter structures. The conveyor belt filter structure includes multiple conveyor rollers (14). A filter conveyor belt (15) is wound between each group of conveyor rollers (14). Multiple servo drive motors (16) are fixedly installed on the side wall of the water treatment unit (13). Each servo drive motor (16) is fixedly installed with one of the conveyor rollers (14) in each group of conveyor rollers (14) through a coupling. The upper end of the frame support (11) is fixed with a multi-functional pneumatic structure by hexagonal screws. The multi-functional pneumatic structure includes a piston cylinder (17). The front end and rear end of the piston cylinder (17) are respectively provided with a one-way exhaust valve pipeline (34) and a one-way intake valve pipeline (35). Between the multifunctional pneumatic structure and the conveyor belt filter structure, there is a friction cleaning structure and a negative pressure collection integrated structure. The friction cleaning structure and the negative pressure collection integrated structure include a primary transmission gear (43). The primary transmission gear (43) is symmetrically fixed on the side wall of one of the upper conveyor rollers (14). Multiple negative pressure dust collection half-covers (47) are fixedly installed on the upper end of the frame bracket (11) by hexagonal screws. A filter cleaning roller (44) is rotatably installed inside the negative pressure dust collection half-cover (47).

2. The multi-stage treatment and reuse device for starch glue wastewater as described in claim 1, characterized in that, The conveying rollers (14) are in groups of four and are rotatably installed inside the water treatment unit (13) via waterproof bearings. The distribution of each group of conveying rollers (14) is two upper conveying rollers (14) and two lower conveying rollers (14). The two upper conveying rollers (14) are parallel to each other, and the lower conveying rollers (14) are one high and one low, with the lower conveying roller (14) facing the sewage end.

3. The multi-stage treatment and reuse device for starch glue wastewater as described in any one of claims 1-2, characterized in that, The piston cylinder (17) is sealed and slidably installed with a pressure-bearing piston plate (18). A transmission piston rod (19) is fixedly installed on the side wall of the pressure-bearing piston plate (18), and the pressure-bearing piston plate (18) and the piston cylinder (17) are sealed and slidably installed. A swing frame (21) is symmetrically fixedly installed on the side wall of the transmission piston rod (19). An eccentric connecting handle (22) is symmetrically fixedly installed on the side wall of one of the conveying rollers (14) in each group of conveying rollers (14).

4. The multi-stage treatment and reuse device for starch glue wastewater as described in claim 3, characterized in that, Each of the eccentric connecting handles (22) is eccentrically fixedly mounted with a first-stage eccentric pin (23) on its side wall. A first-stage transmission link (24) is rotatably mounted between the multiple first-stage eccentric pins (23). A second-stage eccentric pin (25) is fixedly mounted on the side wall of the first-stage transmission link (24). A second-stage transmission link (26) is rotatably mounted on the outer side of the second-stage eccentric pin (25). A transmission main shaft (27) is rotatably mounted on the end position of the two second-stage transmission links (26) away from the second-stage eccentric pin (25) through a bearing. The transmission main shaft (27) and the swing bracket (21) on the transmission piston rod (19) are rotatably mounted through a bearing.

5. The multi-stage treatment and reuse device for starch glue wastewater as described in claim 1, characterized in that, The water treatment unit (13) is provided with a reflux treatment structure, which includes a secondary liquid inlet unit (29), a primary electrically controlled liquid outlet unit (31), and a liquid reflux pipeline (33). The secondary liquid inlet unit (29) is fixedly connected to the front end of the frame support (11). The primary electrically controlled liquid outlet unit (31) is fixedly connected to the side wall of the water treatment unit (13). The liquid reflux pipeline (33) is fixedly connected between the secondary liquid inlet unit (29) and the primary electrically controlled liquid outlet unit (31). A pressure output pipeline (36) is fixedly connected to one of the one-way air outlet valve pipelines (34). The pressure output pipeline (36) and the liquid reflux pipeline (33) are fixedly connected through a Venturi jet mixer (37).

6. The multi-stage treatment and reuse device for starch glue wastewater as described in claim 1, characterized in that, The water treatment unit (13) is equipped with a centralized aeration structure, which includes multiple aeration units (38). Each aeration unit (38) is located on the side wall of the water treatment unit (13) and on both sides of the filter conveyor belt (15) near the sewage end. The aeration holes of the aeration unit (38) face the center of the filter conveyor belt (15). Each aeration unit (38) is equipped with an air supply pipe (39) on its back. The air supply pipe (39) extends to the outside of the water treatment unit (13) through a waterproof sleeve. The ends of the air supply pipe (39) are fixedly connected to a multi-way connecting pipe assembly (42). One of the one-way air outlet valve pipes (34) is equipped with a pipe conversion joint (41). The pipe conversion joint (41) is fixedly connected to the multi-way connecting pipe assembly (42).

7. The multi-stage treatment and reuse device for starch glue wastewater as described in claim 6, characterized in that, The filter cleaning roller (44) is symmetrically fixed with a secondary transmission gear (46). The primary transmission gear (43) and the secondary transmission gear (46) are located outside the water treatment unit (13) and the upper sealing cover (45) and mesh with each other. The negative pressure dust collection half cover (47) is symmetrically provided with pneumatic quick-connect connectors (48).

8. The multi-stage treatment and reuse device for starch glue wastewater as described in claim 7, characterized in that, The two one-way air intake valve pipelines (35) are connected together by a first-level negative pressure pipeline assembly (49), and the first-level negative pressure pipeline assembly (49) is equipped with an electrically controlled pressure regulating air intake valve (51) and an air source filter tank (56).

9. The multi-stage treatment and reuse device for starch glue wastewater as described in claim 8, characterized in that, The air source filter tank (56) is located inside the electrically controlled pressure regulating air inlet valve (51), and the pneumatic quick-connect fittings (48) are fixedly connected to each other by a two-stage negative pressure pipeline assembly (52).

10. The multi-stage treatment and reuse device for starch glue wastewater as described in claim 9, characterized in that, The secondary negative pressure pipeline assembly (52) and the electrically controlled pressure regulating air inlet valve (51) are fixedly connected through the cyclone dust separator (53). The upper end of the frame support (11) is provided with a dust collection cylinder (54). The cyclone dust separator (53) and the dust collection cylinder (54) are connected by a double external thread corrugated pipe (55).

Images