Method and device for treating wastewater from soy product processing

Abstract

This invention discloses a method and equipment for treating wastewater generated from soybean product processing, including a coagulation tank, an outer shell fixed to one side of the coagulation tank, and a UASB anaerobic reactor disposed on the other side of the coagulation tank. The supernatant outlet of the coagulation tank is connected to the UASB anaerobic reactor. A bevel gear drive assembly is installed in the outer shell and has multiple power output ends. Three shaft-type mixing structures are arranged at intervals along the length of the coagulation tank, and the power input end of each shaft-type mixing structure is connected to one power output end of the bevel gear drive assembly. This invention achieves a design scheme in which mobile dosing and multiple mixing structures work collaboratively through the same power source, solving the problems of uneven mixing and poor adaptability of traditional fixed-point dosing, and avoiding spatial interference and temporal misalignment between simple mobile dosing and fixed agitators.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology for soybean products, specifically a method and equipment for treating wastewater generated during soybean product processing. Background Technology

[0002] In the treatment of wastewater from soybean product processing, larger solid debris such as soybean skins and residue are first intercepted by a screen. The wastewater then enters a regulating tank to balance water quality and quantity, preventing drastic fluctuations in subsequent treatment loads caused by intermittent discharge during production. Next, the wastewater enters a coagulation sedimentation or flotation unit, where chemicals are added to coagulate fine suspended solids and colloidal pollutants into flocs. After sedimentation or flotation separation, the sludge formed from the flocs is treated separately, while the supernatant enters a UASB anaerobic reactor for core biochemical degradation. Inside the reactor, residual dissolved organic pollutants such as proteins, starches, and sugars in the wastewater are gradually decomposed and transformed by anaerobic microorganisms. First, hydrolytic acidifying bacteria decompose large organic molecules into smaller molecules, then acid-producing bacteria convert them into intermediate products such as organic acids. Subsequently, acetic acid-producing bacteria further convert these substances into acetic acid, and finally, methanogenic bacteria convert acetic acid, hydrogen, carbon dioxide, etc. into biogas, thereby achieving efficient removal of organic matter. The wastewater after anaerobic treatment still contains certain pollutants and will continue to enter the aerobic treatment unit, where aerobic microorganisms further decompose residual organic matter and remove ammonia nitrogen. Afterward, the wastewater is separated into mud and water through a secondary sedimentation tank, and the supernatant is further purified through deep treatment according to discharge requirements, ultimately achieving compliant discharge or reuse. In the coagulation and sedimentation stage before anaerobic treatment, the effluent from the equalization tank is pumped into the coagulation reaction tank, followed by the sequential addition of polyaluminum chloride and polyacrylamide. Through mixing, dense flocculent sludge is formed to reduce the subsequent biochemical load. During this process, the addition area of ​​flocculants and coagulants in the coagulation tank is fixed at a certain location, such as the tank inlet or a certain side wall. After the agents enter the tank, they mainly rely on water flow turbulence and mechanical stirring for diffusion. When the influent fluctuates or the agitator is not set properly, the fixed-point added solution cannot quickly contact all the wastewater, resulting in local agent concentrations that are too high or too low. If a mobile addition method is used, it is difficult to synchronize with the mixing stage, which requires additional complex components such as guide rails, walking mechanisms, and hose connections. However, there are a large number of fixed stirring blades, baffles, and partitions in the coagulation tank, which interfere with each other in space. It is difficult to allow the addition point to move freely without disrupting the original mixing flow field. Summary of the Invention

[0003] The purpose of this invention is to provide a method and equipment for treating wastewater generated from soybean product processing. A control box is used to activate a bevel gear drive assembly, which transmits a portion of its power to a linear displacement assembly. The linear displacement assembly drives a multi-branch parallel dosing structure to move along the length of the coagulation tank. A vertical pump delivers coagulant or flocculant from a dual-chamber storage tank into the corresponding multi-branch parallel dosing structure to complete the dosing operation. During the dosing process, the power of the bevel gear drive assembly is also distributed to three shaft-type mixing structures, a pendulum-type mixing structure, and a rocker arm-type mixing structure, realizing a configuration of multiple mixing zones and mobile dosing of chemicals, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a method for treating wastewater generated during soybean product processing, comprising the following steps: S1. After homogenization in the equalization tank, the soybean product wastewater continuously enters the coagulation tank at a set flow rate. The staff starts the bevel gear drive assembly through the control box. The bevel gear drive assembly distributes power to the pendulum mixing structure, the rocker arm mixing structure, and the three shaft mixing structures simultaneously. The shaft mixing structures rotate and generate strong axial turbulence, while the pendulum mixing structure and the rocker arm mixing structure reciprocate and generate gentle convection, so that multiple mixing zones are formed in the coagulation tank along the length direction. S2. Simultaneously with the formation of the mixing zone, another portion of the power from the bevel gear drive assembly will be allocated to the linear displacement assembly. The linear displacement assembly enables the linear movement of the multi-branch parallel dosing structure along the length of the pool. The operator starts the vertical transfer pump, which draws the agent from the dual-chamber storage tank. One of the vertical transfer pumps first draws the polyaluminum chloride solution from the flocculant chamber of the dual-chamber storage tank and delivers it through the pipeline to the multi-branch parallel dosing structure. The other vertical transfer pump then draws the polyacrylamide solution from the coagulant chamber of the dual-chamber storage tank after a predetermined time. The delivery pipelines for the two agents are independent of each other. S3. The vertical transfer pump starts to deliver flocculant to the multi-branch parallel dosing structure. The agent is evenly sprayed from the multi-branch parallel dosing structure and enters the wastewater in the coagulation tank. The linear displacement component drives the multi-branch parallel dosing structure to move from one end of the tank to the other at a set speed. During the movement, the agent is always added to the mixing area. The turbulence generated by the shaft mixing structure, the pendulum mixing structure, and the rocker arm mixing structure disperses the agent into the water body instantly, causing the colloidal particles in the wastewater to destabilize and flocculate. S4. When the multi-branch parallel dosing structure moves to the other end of the tank, the control box automatically stops the vertical delivery pump and commands the shaft mixing structure to reverse drive, so that the linear displacement component drives the multi-branch parallel dosing structure to move back in the opposite direction, sending the multi-branch parallel dosing structure back to the starting position at the inlet end, ready for the next dosing cycle. During this process, the shaft mixing structure, the oscillating mixing structure, and the rocker arm mixing structure continue to work until the agent and wastewater have been fully mixed and flocs have grown in the coagulation tank. The mixed liquid containing a large number of dense flocs flows from the end of the coagulation tank into the next stage sedimentation tank. S5. The coagulation tank is left to settle. The flocs settle to the bottom of the tank under gravity to form a sludge layer, while the supernatant becomes clear. The sludge at the bottom of the coagulation tank is discharged to the sludge treatment system, and the supernatant is transported through pipelines to the subsequent UASB anaerobic reactor for anaerobic biological treatment.

[0005] The present invention also provides a treatment device for wastewater generated from soybean product processing, including a coagulation tank, an outer shell fixed to one side of the outer wall of the coagulation tank, and a UASB anaerobic reactor disposed on the other side of the coagulation tank, wherein the supernatant outlet of the coagulation tank is connected to the UASB anaerobic reactor. A bevel gear drive assembly is installed in an outer casing and has multiple power output ends. Three shaft-type mixing structures are arranged at intervals along the length of the coagulation tank. The power input end of each shaft-type mixing structure is connected to one power output end of the bevel gear drive assembly. A pendulum-type mixing structure and a rocker arm-type mixing structure are respectively installed on both sides inside the outer casing. The drive shafts of the pendulum-type mixing structure and the rocker arm-type mixing structure are all connected to one power output end of the bevel gear drive assembly. A dual-chamber storage tank is fixed to one side of the top of the coagulation tank and has two mutually isolated chambers inside. Vertical delivery pumps are installed on the left and right outer walls of the dual-chamber storage tank. Each vertical delivery pump has a multi-branch parallel dosing structure located above the coagulation tank at its outlet end. A linear displacement assembly is installed at the top of the coagulation tank. Two multi-branch parallel dosing structures are installed on the moving end of the linear displacement assembly and move together with the moving end along the length of the coagulation tank. The input end of the linear displacement assembly is connected to a power output end of a bevel gear drive assembly. The control box is mounted on the outer casing and is electrically connected to the bevel gear drive assembly, the vertical conveying pump, and the linear displacement assembly.

[0006] Preferably, the shaft-type mixing structure consists of a stirring shaft and a first bevel gear. The stirring shaft is rotatably installed inside the coagulation tank through a dynamic seal. One end of the stirring shaft extends into the interior of the outer casing. The first bevel gear is disposed in the outer casing and fixedly connected to one end of the stirring shaft.

[0007] Preferably, the bevel gear drive assembly includes a double bevel gear shaft, a first secondary bevel gear shaft, a second secondary bevel gear shaft, a universal joint, a main bevel gear shaft, and a motor; The double bevel gear shaft is rotatably mounted in the outer housing through a bearing seat and is located between the pendulum-type hybrid structure and the rocker arm-type hybrid structure. Both ends of the double bevel gear shaft are meshed with a first bevel gear. A partition plate one and a partition plate two are fixed on one side inside the outer housing. The first and second auxiliary bevel gear shafts are rotatably mounted in the first and second partitions, respectively, and the universal joint is installed between the opposite ends of the second and first auxiliary bevel gear shafts. The motor is mounted on one side of the outer wall of the outer casing, and the main bevel gear shaft is fixed on the output shaft of the motor. The end of the main bevel gear shaft away from the motor meshes with the No. 1 bevel gear on one of the stirring shafts.

[0008] Preferably, the pendulum-type hybrid structure includes a short shaft, a first rotating handle, a liquid-dispensing plate, a support shaft, a second rocker handle, a double fisheye connecting rod, and a transmission pair with speed-increasing capability. The short shaft and the support shaft are rotatably mounted on the inner wall of the same side of the outer casing, and one end of the support shaft extends into the coagulation tank. The speed-increasing transmission pair is installed between one of the stirring shafts and the short shaft. The liquid-dispensing plate is set inside the coagulation tank and fixed to one end of the support shaft. The first rotating handle and the second rocker handle are fixed to the other end of the short shaft and the support shaft, respectively, and the double fish-eye connecting rod is hinged between the first rotating handle and the second rocker handle.

[0009] Preferably, the rocker arm hybrid structure includes an L-shaped support fixed inside the outer casing, a following shaft and a driven bevel gear shaft vertically rotatably mounted at the front and rear positions inside the L-shaped support, and a U-shaped shift fork fixed at the upper position of the following shaft. The lower end of the driven bevel gear shaft meshes with one of the first bevel gears, and an end plate is fixed to the upper end of the driven bevel gear shaft. A convex roller extending through to the outside of the U-shaped shift fork is fixed to one side of the top of the end plate.

[0010] Preferably, an upper support arm is fixed to the outer surface of the following shaft above the U-shaped shift fork. The upper support arm passes under the linear displacement assembly and is located above the coagulation tank. Several mixing rods are fixed along the length of the top of the upper support arm, and the mixing rods extend into the coagulation tank.

[0011] Preferably, the linear displacement assembly includes guide rails laid along the length of the coagulation tank on both sides, an I-beam slidably mounted on the guide rails, and a belt linear module for driving the I-beam slidably along the guide rails. A chain drive pair is mounted on the output shaft of the belt linear module, and the chain drive pair is used to connect with one of the stirring shafts.

[0012] Preferably, the multi-branch parallel dosing structure includes a pipe support fixed on an I-beam, multiple branch pipes arranged in parallel along the width of the coagulation tank on the lower surface of the pipe support, and multiple dosing valves vertically connected to the branch pipes.

[0013] Preferably, a liquid collecting pipe is installed on the same end of the plurality of diverter pipes, and a flow regulating valve is installed at one end of the liquid collecting pipe. A flexible hose is installed between the inlet of the flow regulating valve and the outlet of the vertical transfer pump.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The treatment method and equipment for wastewater generated from soybean product processing are designed with a structure that works together, including an outer shell, a bevel gear drive assembly, a shaft mixing structure, a pendulum mixing structure, a rocker arm mixing structure, a linear displacement assembly, and a multi-branch parallel dosing structure. Part of the power of the bevel gear drive assembly is transmitted to the linear displacement assembly, which drives the multi-branch parallel dosing structure to move along the length of the coagulation tank. The vertical pump delivers the coagulant or flocculant from the dual-chamber storage tank to the corresponding multi-branch parallel dosing structure to complete the dosing operation. During the dosing process, the power of the bevel gear drive assembly is also distributed to the three shaft mixing structures, the pendulum mixing structure, and the rocker arm mixing structure, realizing a design scheme in which mobile dosing and multiple mixing structures work together through the same power source. The supernatant after sedimentation then enters the UASB anaerobic reactor for treatment, thereby solving the problems of uneven mixing and poor adaptability of traditional fixed-point dosing, and avoiding spatial interference and temporal misalignment between simple mobile dosing and fixed agitators. The bevel gear drive assembly simultaneously distributes power to the linear displacement assembly and multiple mixing structures, enabling the multi-branch parallel dosing structure to move slowly along the length of the coagulation tank. Meanwhile, the three shaft-type mixing structures, the oscillating mixing structure, and the rocker arm mixing structure generate flow fields of different intensities and directions in different areas. The moving multi-branch parallel dosing structure can always add the agent to the area with the most intense mixing and the most complete turbulence. No matter how the wastewater flow rate fluctuates, the agent can be dispersed and fully contact the colloidal particles in the water to improve the density of the flocs. Secondly, in traditional designs, mobile dosing devices and mixers require independent motors and control systems. By using a bevel gear drive assembly as the total power output, the power is distributed to the linear displacement assembly, shaft mixer, paddle mixer, and rocker arm mixer through mechanical transmission. Each component naturally maintains a strict synchronous relationship. The moving speed of the dosing pipe and the rotation phase of the mixing structure can be preset. The entire coagulation tank is unobstructed, avoiding spatial interference between the guide rail, the traveling mechanism, and the fixed stirring blades. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ; Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 5 ; Figure 6 This is a three-dimensional structural diagram of the bevel gear drive assembly of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B; Figure 8 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 9 This is a schematic diagram of the three-dimensional cross-sectional structure of the outer casing of the present invention; Figure 10 This is a three-dimensional structural diagram of the UASB anaerobic reactor of the present invention after dismantling; Figure 11 This is a three-dimensional structural diagram of the outer casing and linear displacement component of the present invention in their assembled state; Figure 12 This is a three-dimensional structural diagram of the multi-branch parallel dosing structure and the linear displacement component of the present invention in the assembled state. Figure 13 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 5 .

[0016] In the diagram: 1. Coagulation tank; 2. Outer casing; 3. Shaft-type mixing structure; 31. Stirring shaft; 32. First bevel gear; 4. Oscillating mixing structure; 41. Short shaft; 42. First handle; 43. Dispensing plate; 44. Support shaft; 45. Second crank handle; 46. Double fisheye connecting rod; 47. Transmission pair with speed-increasing mechanism; 5. Rocker arm mixing structure; 51. L-shaped support; 52. Following shaft; 53. Driven bevel gear shaft; 531. End plate; 54. Convex roller; 55. U-shaped shift fork; 56. Upper support arm; 57. Mixing rod; 6. Bevel gear drive assembly; 61. Double bevel gear. 62. Gear shaft; 63. Partition plate 1; 64. Secondary bevel gear shaft 1; 65. Partition plate 2; 66. Secondary bevel gear shaft 2; 67. Universal joint; 68. Main bevel gear shaft; 7. Motor; 8. Dual-chamber storage tank; 9. Vertical transfer pump; 91. Multi-branch parallel dosing structure; 92. Pipe support; 93. Collection pipe; 94. Flow regulating valve; 95. Hoses; 96. Diverter pipe; 10. Dosing valve; 10. Linear displacement assembly; 1001. I-beam; 1002. Belt linear module; 1003. Chain drive pair; 11. UASB anaerobic reactor; 12. Control box. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] Example 1, by Figures 1 to 5 The present invention provides a method for treating wastewater generated during soybean product processing, comprising the following steps: S1. After homogenization in the equalization tank, the soybean product wastewater continuously enters the coagulation tank 1 at a set flow rate. The operator starts the bevel gear drive assembly 6 through the control box 12. The bevel gear drive assembly 6 distributes power to the oscillating mixing structure 4, the rocker arm mixing structure 5, and the three shaft mixing structures 3. The shaft mixing structures 3 rotate and generate strong axial turbulence, while the oscillating mixing structure 4 and the rocker arm mixing structure 5 reciprocate and generate gentle convection, so that multiple mixing areas are formed in the coagulation tank 1 along the length direction. S2. Simultaneously with the formation of the mixing zone, another portion of the power of the bevel gear drive assembly 6 will be allocated to the linear displacement assembly 10. The linear displacement assembly 10 realizes the linear movement of the multi-branch parallel dosing structure 9 along the length of the pool. The operator starts the vertical transfer pump 8, which draws the agent from the dual-chamber storage tank 7. One of the vertical transfer pumps 8 first draws the polyaluminum chloride solution from the flocculant chamber of the dual-chamber storage tank 7 and transports it through the pipeline to the multi-branch parallel dosing structure 9. The other vertical transfer pump 8 then draws the polyacrylamide solution from the coagulant chamber of the dual-chamber storage tank 7 after a predetermined time. The delivery pipelines for the two agents are independent of each other. S3, the vertical transfer pump 8 starts to deliver flocculant to the multi-branch parallel dosing structure 9. The agent is evenly sprayed from the multi-branch parallel dosing structure 9 and enters the wastewater in the coagulation tank 1. The linear displacement component 10 drives the multi-branch parallel dosing structure 9 to move from one end of the tank to the other at a set speed. During the movement, the agent is always added to the mixing area. The turbulence generated by the shaft mixing structure 3, the oscillating mixing structure 4, and the rocker arm mixing structure 5 disperses the agent into the water body instantly, causing the colloidal particles in the wastewater to destabilize and flocculate. S4. When the multi-branch parallel dosing structure 9 moves to the other end of the tank, the control box 12 automatically stops the vertical transfer pump 8 and instructs the shaft mixing structure 3 to reverse drive, so that the linear displacement component 10 drives the multi-branch parallel dosing structure 9 to move back in the opposite direction, sending the multi-branch parallel dosing structure 9 back to the starting position at the inlet end, ready for the next dosing cycle. During this process, the shaft mixing structure 3, the oscillating mixing structure 4, and the rocker arm mixing structure 5 continue to work until the agent and wastewater have been fully mixed and flocs have grown in the coagulation tank 1, and the mixed liquid containing a large number of dense flocs flows from the end of the coagulation tank 1 into the next stage sedimentation tank. S5. The coagulation tank 1 is left to settle. The flocs settle to the bottom of the tank under gravity to form a sludge layer. The supernatant becomes clear. The sludge at the bottom of the coagulation tank 1 is discharged to the sludge treatment system. The supernatant is transported through pipelines to the subsequent UASB anaerobic reactor 11 for anaerobic biological treatment.

[0019] This embodiment of a wastewater treatment device for soybean product processing includes a coagulation tank 1, an outer shell 2 fixed to one side of the outer wall of the coagulation tank 1, and a UASB anaerobic reactor 11 disposed on the other side of the coagulation tank 1. The supernatant outlet of the coagulation tank 1 is connected to the UASB anaerobic reactor 11. The bevel gear drive assembly 6 is installed in the outer casing 2 and has multiple power output ends. Three shaft-type mixing structures 3 are arranged at intervals along the length direction inside the coagulation tank 1. The power input end of each shaft-type mixing structure 3 is connected to one power output end of the bevel gear drive assembly 6. The two sides inside the outer casing 2 are respectively equipped with a pendulum-type mixing structure 4 and a rocker arm-type mixing structure 5. The drive shafts of the pendulum-type mixing structure 4 and the rocker arm-type mixing structure 5 are all connected to one power output end of the bevel gear drive assembly 6. The dual-chamber storage tank 7 is fixed to one side of the top of the coagulation tank 1 and has two mutually isolated chambers inside. Vertical transfer pumps 8 are installed on the left and right outer walls of the dual-chamber storage tank 7. Each vertical transfer pump 8 has a multi-branch parallel dosing structure 9 located above the coagulation tank 1 at its outlet end. Linear displacement component 10 is set at the top of coagulation tank 1. Two multi-branch parallel dosing structures 9 are installed on the moving end of linear displacement component 10 and move together with the moving end along the length of coagulation tank. The input end of linear displacement component 10 is connected to a power output end of bevel gear drive component 6. Control box 12 is mounted on outer casing 2 and is electrically connected to bevel gear drive assembly 6, vertical conveying pump 8, and linear displacement assembly 10. Coagulation tank 1 is the main site where wastewater and chemicals react and is equipped with a sludge discharge slope at the bottom; During the coagulation operation, the liquid level of the agent in the dual-chamber storage tank 7 should be checked regularly, and freshly prepared flocculant and coagulant aid should be added in a timely manner. Observe whether there is a large amount of foam or unsettled fine flocs on the surface of the coagulation tank 1. If so, adjust the moving speed of the linear displacement component 10 and the rotation speed of each mixing structure appropriately through the control box 12. During the mixing stage after the dosing is completed, the vertical delivery pump 8 stops working, causing the multi-branch parallel dosing structure 9 to stop dosing, while the shaft mixing structure 3, the oscillating mixing structure 4, and the rocker arm mixing structure 5 still receive rotational power from the bevel gear drive assembly 6. The UASB anaerobic reactor 11 is a post-treatment unit after coagulation and sedimentation. It receives the supernatant after coagulation and sedimentation pretreatment, further removes chemical oxygen demand, reduces the load on aerobic treatment, and the biogas produced can be collected and utilized.

[0020] Example 2, based on Example 1, is... Figure 6 , Figure 7 , Figure 8 and Figure 9It is given that three shaft-type mixing structures 3 are arranged in parallel along the direction of the tank body to reduce the mixing dead angle. The shaft-type mixing structure 3 consists of a stirring shaft 31 and a first bevel gear 32. The stirring shaft 31 is rotatably installed inside the coagulation tank 1 through a dynamic seal. One end of the stirring shaft 31 extends into the interior of the outer shell 2. The first bevel gear 32 is set in the outer shell 2 and is fixedly connected to one end of the stirring shaft 31. The bevel gear drive assembly 6 includes a double bevel gear shaft 61, a first secondary bevel gear shaft 63, a second secondary bevel gear shaft 65, a universal joint 66, a main bevel gear shaft 67, and a motor 68; The double bevel gear shaft 61 is rotatably mounted in the outer housing 2 through the bearing seat and is located between the oscillating hybrid structure 4 and the rocker arm hybrid structure 5. Both ends of the double bevel gear shaft 61 are meshed with a first bevel gear 32. A partition 1 62 and a partition 2 64 are fixed on one side inside the outer housing 2. The first secondary bevel gear shaft 63 and the second secondary bevel gear shaft 65 are rotatably mounted in the first partition 62 and the second partition 64, respectively, and the universal joint 66 is installed between the opposite ends of the second secondary bevel gear shaft 65 and the first secondary bevel gear shaft 63. The motor 68 is mounted on one side of the outer wall of the outer casing 2, and the main bevel gear shaft 67 is fixed on the output shaft of the motor 68. The end of the main bevel gear shaft 67 away from the motor 68 meshes with the first bevel gear 32 on one of the stirring shafts 31. When the bevel gear drive assembly 6 is working, the output shaft of the motor 68 drives the main bevel gear shaft 67 to rotate. The main bevel gear shaft 67 drives the stirring shaft 31 to rotate through the first bevel gear 32. The stirring shaft 31 forms a violent mixing flow field in the coagulation tank 1, thereby quickly dispersing the agent sprayed by the multi-branch parallel dosing structure 9 into the entire water body in the coagulation tank 1, so that the colloidal particles in the soybean product wastewater are instantly destabilized, laying the foundation for subsequent floc growth. The power input ends of the pendulum hybrid structure 4 and the rocker arm hybrid structure 5 are connected by a double bevel gear shaft 61, while the two shaft hybrid structures 3 that are far away from the pendulum hybrid structure 4 are connected by a secondary bevel gear shaft 65, a secondary bevel gear shaft 63, and a universal joint 66, thereby distributing the rotational power of the motor 68 to each part that needs to move proportionally. The pendulum-type hybrid structure 4 includes a short shaft 41, a first rotating handle 42, a liquid-dispensing plate 43, a support shaft 44, a second rocker handle 45, a double fisheye connecting rod 46, and a speed-increasing transmission pair 47. The short shaft 41 and the support shaft 44 are rotatably mounted on the inner wall of the outer casing 2 on the same side, and one end of the support shaft 44 extends into the coagulation tank 1. The speed-increasing transmission pair 47 is installed between one of the stirring shafts 31 and the short shaft 41. The liquid-dispensing plate 43 is set inside the coagulation tank 1 and fixedly connected to one end of the support shaft 44. The first rotating handle 42 and the second rocker handle 45 are respectively fixed to the other end of the short shaft 41 and the support shaft 44, and the double fish-eye connecting rod 46 is hinged between the first rotating handle 42 and the second rocker handle 45. The stirring shaft 31 transmits rotational power to the short shaft 41 through the speed-increasing transmission pair 47, causing the first rotating handle 42 to rotate around the short shaft 41. During this process, the revolution of the first rotating handle 42 is converted into the swinging motion of the second rocker handle 45 through the double fish-eye connecting rod 46. The second rocker handle 45 drives the support shaft 44 and the liquid-dispensing plate 43 to perform reciprocating swinging motion. The liquid-dispensing plate 43 moves back and forth in the water, generating periodic transverse water flow. By providing transverse shear flow, it promotes the collision of micro-flocs. The rocker arm type mixing structure 5 includes an L-shaped support 51 fixed inside the outer casing 2, a following shaft 52 and a driven bevel gear shaft 53 vertically rotatably mounted at the front and rear positions inside the L-shaped support 51, and a U-shaped shift fork 55 fixed at the upper position of the following shaft 52. The lower end of the driven bevel gear shaft 53 meshes with one of the first bevel gears 32. An end plate 531 is fixed to the upper end of the driven bevel gear shaft 53, and a convex roller 54 extending through to the outside of the U-shaped shift fork 55 is fixed to one side of the top of the end plate 531. An upper support arm 56 is fixed to the outer surface of the following shaft 52 above the U-shaped shift fork 55. The upper support arm 56 passes through the lower part of the linear displacement component 10 and is located above the coagulation tank 1. Several mixing rods 57 are fixed in the length direction of the top of the upper support arm 56, and the mixing rods 57 extend into the coagulation tank 1. The shaft-type mixing structure 3 at the middle position obtains power through the double bevel gear shaft 61, which in turn drives the driven bevel gear shaft 53 to rotate. At this time, the cam roller 54 revolves around the driven bevel gear shaft 53. Since the cam roller 54 is located in the U-shaped fork 55, the U-shaped fork 55 is driven and reciprocates. At this time, the upper support arm 56 moves together, and the mixing rod 57 swings slowly in the water, generating a large-scale gentle convection. After the coagulant is added, it provides a slow contact opportunity for the micro flocs, allowing them to continue to grow into dense large flocs. At the same time, due to the gentle movement, it will not damage the already formed floc structure.

[0021] Example 3, based on Example 2, by Figure 10 , Figure 11 , Figure 12 and Figure 13As shown, the linear displacement assembly 10 includes guide rails laid along the length of the coagulation tank 1 on both sides of the coagulation tank 1, an I-beam 1001 slidably mounted on the guide rails, and a belt linear module 1002 that drives the I-beam 1001 to move along the guide rails. A chain drive pair 1003 is mounted on the output shaft of the belt linear module 1002, and the chain drive pair 1003 is used to connect with one of the stirring shafts 31. The last shaft-type mixing structure 3 transmits power to the belt linear module 1002 through the chain drive pair 1003. The belt linear module 1002 drives the I-beam 1001 and the multi-branch parallel dosing structure 9 to move along the length of the coagulation tank 1, so that the agent is always added to the current mixing area, while avoiding the problem of uneven mixing caused by fixed dosing points. The belt linear module 1002 needs to be pre-configured with limit switches or position sensors. The control box 12 controls the motor 68 to work in the set direction and speed based on the position feedback signal. The multi-branch parallel dosing structure 9 includes a pipe support 91 fixed on the I-beam 1001, multiple branch pipes 95 arranged in parallel along the width direction of the coagulation tank 1 on the lower surface of the pipe support 91, and multiple dosing valves 96 vertically connected to the branch pipes 95. A collection pipe 92 is installed on the same end of the multiple branch pipes 95. A flow regulating valve 93 is installed at one end of the collection pipe 92. A hose 94 is installed between the inlet of the flow regulating valve 93 and the outlet of the vertical transfer pump 8. The hose 94 needs to have sufficient margin to ensure that the multi-branch parallel dosing structure 9 has sufficient movable space and is always connected to the vertical transfer pump 8. The opening of the flow regulating valve 93 is adjusted to indirectly control the spray volume of the dosing valve 96. The vertical delivery pump 8 delivers the agent to the hose 94 at a constant pressure. The agent then passes through the flow regulating valve 93 and the collection pipe 92 and is distributed to each branch pipe 95. Finally, it is injected into the pool from the dosing valve 96, thus ensuring that the dosage of the agent sprayed from each nozzle is uniform. As the entire structure moves along the length of the pool, the agent forms a moving drug curtain in the pool, improving the drug dispersion effect.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for treating wastewater generated during soybean product processing, characterized in that: Includes the following steps: S1. After homogenization in the equalization tank, the soybean product wastewater continuously enters the coagulation tank (1) at a set flow rate. The staff starts the bevel gear drive assembly (6) through the control box (12). The bevel gear drive assembly (6) distributes power to the paddle-type mixing structure (4), the rocker arm mixing structure (5) and the three shaft mixing structures (3) at the same time. The shaft mixing structure (3) rotates and generates strong axial turbulence, while the paddle-type mixing structure (4) and the rocker arm mixing structure (5) reciprocate and generate gentle convection, so that multiple mixing areas are formed in the coagulation tank (1) along the length direction. S2. At the same time as the mixing area is formed, another part of the power of the bevel gear drive assembly (6) will also be allocated to the linear displacement assembly (10). The linear displacement assembly (10) realizes the linear movement of the multi-branch parallel dosing structure (9) along the length of the pool. The staff turns on the vertical transfer pump (8). The vertical transfer pump (8) draws the agent from the double-chamber storage tank (7). One of the vertical transfer pumps (8) first draws the polyaluminum chloride solution in the flocculant chamber of the double-chamber storage tank (7) and transports it to the multi-branch parallel dosing structure (9) through the pipeline. The other vertical transfer pump (8) then draws the polyacrylamide solution in the coagulant chamber of the double-chamber storage tank (7) after a predetermined time. The two agents are transported through independent pipelines. S3, the vertical transfer pump (8) starts to deliver flocculant to the multi-branch parallel dosing structure (9). The agent is evenly sprayed from the multi-branch parallel dosing structure (9) and enters the wastewater in the coagulation tank (1). The linear displacement component (10) drives the multi-branch parallel dosing structure (9) to move from one end of the tank to the other at a set speed. During the movement, the agent is always added to the mixing area. The turbulence generated by the shaft mixing structure (3), the swing mixing structure (4), and the rocker arm mixing structure (5) disperses the agent into the water body instantly, causing the colloidal particles in the wastewater to destabilize and flocculate. S4. When the multi-branch parallel dosing structure (9) moves to the other end of the tank, the control box (12) automatically stops the vertical transfer pump (8) and instructs the shaft mixing structure (3) to reverse drive so that the linear displacement component (10) drives the multi-branch parallel dosing structure (9) to move back in the opposite direction, sending the multi-branch parallel dosing structure (9) back to the starting position at the inlet end, preparing for the next dosing cycle. During this process, the shaft mixing structure (3), the swing mixing structure (4), and the rocker arm mixing structure (5) continue to work until the agent and wastewater have been fully mixed and flocs have grown in the coagulation tank (1), and the mixed liquid containing a large number of dense flocs flows from the end of the coagulation tank (1) into the next stage sedimentation tank. S5. The coagulation tank (1) is left to settle. The flocs settle to the bottom of the tank under gravity to form a sludge layer. The supernatant becomes clear. The sludge at the bottom of the coagulation tank (1) is discharged to the sludge treatment system. The supernatant is transported to the subsequent UASB anaerobic reactor (11) through the pipeline for anaerobic biological treatment.

2. A treatment device for wastewater generated from soybean product processing, comprising a coagulation tank (1), an outer casing (2) fixed to one side of the outer wall of the coagulation tank (1), and a UASB anaerobic reactor (11) disposed on the other side of the coagulation tank (1), wherein the supernatant outlet of the coagulation tank (1) is connected to the UASB anaerobic reactor (11), characterized in that: The bevel gear drive assembly (6) is installed in the outer casing (2) and has multiple power output ends. The coagulation tank (1) has three shaft-type mixing structures (3) arranged at intervals along the length direction. The power input end of each shaft-type mixing structure (3) is connected to one power output end of the bevel gear drive assembly (6). The two sides inside the outer casing (2) are respectively equipped with a pendulum-type mixing structure (4) and a rocker arm-type mixing structure (5). The drive shafts of the pendulum-type mixing structure (4) and the rocker arm-type mixing structure (5) are all connected to one power output end of the bevel gear drive assembly (6). A dual-chamber storage tank (7) is fixed to one side of the top of the coagulation tank (1) and has two mutually isolated chambers inside. Vertical transfer pumps (8) are installed on the left and right outer walls of the dual-chamber storage tank (7). Each vertical transfer pump (8) has a multi-branch parallel dosing structure (9) located above the coagulation tank (1) at its outlet end. Linear displacement assembly (10) is set at the top of coagulation tank (1). Two multi-branch parallel dosing structures (9) are installed on the moving end of the linear displacement assembly (10) and move together with the moving end along the length of the coagulation tank. The input end of the linear displacement assembly (10) is connected to a power output end of the bevel gear drive assembly (6). The control box (12) is mounted on the outer casing (2) and is electrically connected to the bevel gear drive assembly (6), the vertical delivery pump (8), and the linear displacement assembly (10).

3. The wastewater treatment equipment for soybean product processing according to claim 2, characterized in that: The shaft-type mixing structure (3) consists of a stirring shaft (31) and a first bevel gear (32). The stirring shaft (31) is rotatably installed inside the coagulation tank (1) through a dynamic seal. One end of the stirring shaft (31) extends into the interior of the outer casing (2). The first bevel gear (32) is located in the outer casing (2) and is fixedly connected to one end of the stirring shaft (31).

4. The wastewater treatment equipment for soybean product processing according to claim 3, characterized in that: The bevel gear drive assembly (6) includes a double bevel gear shaft (61), a first secondary bevel gear shaft (63), a second secondary bevel gear shaft (65), a universal joint (66), a main bevel gear shaft (67), and a motor (68). The double bevel gear shaft (61) is rotatably mounted in the outer casing (2) through the bearing seat and is located between the pendulum hybrid structure (4) and the rocker arm hybrid structure (5). Both ends of the double bevel gear shaft (61) are meshed with a first bevel gear (32). A partition plate one (62) and a partition plate two (64) are fixed on one side inside the outer casing (2). The first (63) and the second (65) of the secondary bevel gear are rotatably installed in the first (62) and the second (64) of the partition, respectively, and the universal joint (66) is installed between the opposite ends of the second (65) and the first (63) of the secondary bevel gear; The motor (68) is mounted on one side of the outer wall of the outer casing (2), and the main bevel gear shaft (67) is fixed on the output shaft of the motor (68). The end of the main bevel gear shaft (67) away from the motor (68) meshes with the first bevel gear (32) on one of the stirring shafts (31).

5. The wastewater treatment equipment for soybean product processing according to claim 3, characterized in that: The pendulum hybrid structure (4) includes a short shaft (41), a first rotating handle (42), a liquid-dispensing plate (43), a support shaft (44), a second rocker handle (45), a double fisheye connecting rod (46), and a speed-increasing transmission pair (47). The short shaft (41) and the support shaft (44) are rotatably mounted on the inner wall of the outer casing (2) on the same side, and one end of the support shaft (44) extends into the coagulation tank (1). The speed-increasing transmission pair (47) is installed between one of the stirring shafts (31) and the short shaft (41). The liquid-dispensing plate (43) is set inside the coagulation tank (1) and fixed to one end of the support shaft (44). The first rotating handle (42) and the second rocker handle (45) are respectively fixed to the other end of the short shaft (41) and the support shaft (44), and the double fish-eye connecting rod (46) is hinged between the first rotating handle (42) and the second rocker handle (45).

6. The wastewater treatment equipment for soybean product processing according to claim 3, characterized in that: The rocker arm hybrid structure (5) includes an L-shaped support (51) fixed inside the outer casing (2), a follower shaft (52) and a driven bevel gear shaft (53) vertically rotatably mounted at the front and rear positions inside the L-shaped support (51), and a U-shaped shift fork (55) fixed at the upper position of the follower shaft (52). The lower end of the driven bevel gear shaft (53) meshes with one of the first bevel gears (32). An end plate (531) is fixed at the upper end of the driven bevel gear shaft (53), and a convex roller (54) that penetrates to the outside of the U-shaped shift fork (55) is fixed on one side of the top of the end plate (531).

7. The wastewater treatment equipment for soybean product processing according to claim 6, characterized in that: An upper support arm (56) is fixed on the outer surface of the following shaft (52) above the U-shaped shift fork (55). The upper support arm (56) passes under the linear displacement assembly (10) and is located above the coagulation tank (1). Several mixing rods (57) are fixed in the length direction at the top of the upper support arm (56). The mixing rods (57) extend into the coagulation tank (1).

8. The wastewater treatment equipment for soybean product processing according to claim 3, characterized in that: The linear displacement assembly (10) includes guide rails laid along the length of the coagulation tank (1) on both sides of the coagulation tank (1), an I-beam (1001) slidably mounted on the guide rails, and a belt linear module (1002) that drives the I-beam (1001) to move along the guide rails. A chain drive pair (1003) is installed on the output shaft of the belt linear module (1002), and the chain drive pair (1003) is used to connect with one of the stirring shafts (31).

9. The wastewater treatment equipment for soybean product processing according to claim 8, characterized in that: The multi-branch parallel dosing structure (9) includes a pipe support (91) fixed on the I-beam (1001), a plurality of branch pipes (95) arranged in parallel along the width direction of the coagulation tank (1) on the lower surface of the pipe support (91), and a plurality of dosing valves (96) vertically connected to the branch pipes (95).

10. The wastewater treatment equipment for soybean product processing according to claim 9, characterized in that: A collection pipe (92) is installed on the same end of multiple diverter pipes (95), and a flow regulating valve (93) is installed at one end of the collection pipe (92). A hose (94) is installed between the inlet of the flow regulating valve (93) and the outlet of the vertical transfer pump (8).

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