Membrane biological reaction device and method for chemical wastewater

Abstract

The invention discloses a membrane biological reaction device and method for chemical wastewater, and aims to solve the problems that sludge is easy to adhere to a membrane of an existing membrane biological reactor, manual cleaning wastes time and labor, and sludge accumulation affects system stability. The device comprises a connecting box body, a membrane bioreactor is arranged in the box body, a swing cleaning structure is assembled on the box body, the bottom is connected with a pollution discharge structure, a controller and a water pump are mounted on the side wall, and a pollution discharge pipe is connected with an electromagnetic control valve in series; the swing cleaning structure drives a swing spray pipe to swing and move up and down through multi-stage transmission of a driving motor, and is matched with water supply of a water pump to realize all-directional cleaning of the membrane module; the sewage discharging structure drives an auger to convey sludge through a rotating motor, and a rotating scraping plate scrapes sludge on the inner wall of a funnel, so that the sludge is automatically discharged; when in use, the controller uniformly regulates and controls the operation of each part without manual disassembly. The device is clean, efficient, high in automation degree, capable of avoiding sludge accumulation, improving the operation efficiency and stability of the device and saving the labor cost, and is suitable for complex working conditions of chemical wastewater treatment.

Description

Technical Field

[0001] This invention relates to the field of chemical wastewater treatment technology, and in particular to a membrane bioreactor device and method for chemical wastewater treatment. Background Technology

[0002] In the field of chemical wastewater treatment, traditional technologies face numerous challenges, especially for wastewater containing high concentrations of phenolic and benzene compounds, which pose a significant threat to the stable operation of the system. For a long time, membrane bioreactor (MBR) technology, as a novel wastewater treatment system combining membrane separation and biological treatment technologies, has received widespread attention due to its high efficiency and stability.

[0003] Membrane bioreactor (MBR) technology replaces the secondary sedimentation tank in traditional biological treatment technologies with membrane modules, achieving the goal of maintaining a high concentration of active sludge within the bioreactor, thereby increasing the organic load of biological treatment. Its core architecture includes a bioreactor and a membrane separation unit. The bioreactor is responsible for the degradation of organic matter, while the membrane separation unit is responsible for solid-liquid separation, ensuring the stability of the effluent quality. In operation, wastewater first enters the bioreactor, where it undergoes degradation under the action of microorganisms. It then passes through the membrane module for filtration; the clear effluent is discharged from the system, while the sludge is retained within the reactor to continue participating in the degradation process.

[0004] Despite the excellent performance of membrane bioreactor (MBR) technology in wastewater treatment, several problems remain to be solved during long-term operation. Specifically, existing MBR technologies, such as the wastewater treatment MBR mentioned in CN118724298B and the high-efficiency chemical wastewater treatment system described in CN213012333U, still face the following technical defects and shortcomings in practical applications: 1. Membrane fouling is a prominent issue, making cleaning difficult: High concentrations of organic pollutants, colloidal particles, and microbial metabolites in chemical wastewater are easily adsorbed and deposited on the surface of membrane modules, forming a stubborn sludge layer. This leads to a decrease in membrane flux and an increase in transmembrane pressure, severely affecting the operating efficiency and treatment effect of membrane bioreactors. Traditional membrane cleaning methods, such as those mentioned in CN118724298B, still may require manual intervention or disassembly of the device for rinsing. These methods are cumbersome, time-consuming, and labor-intensive, and may cause physical damage to the membrane modules. Although CN213012333U does not describe the membrane cleaning process in detail, traditional methods generally suffer from incomplete cleaning, easily overlooking the edges and gaps of the membrane modules, leading to repeated membrane fouling and shortening the service life of the membrane modules.

[0005] 2. Incomplete sludge discharge impacts system stability: Sludge generated during membrane cleaning and residual sludge within the bioreactor must be discharged promptly. Otherwise, sludge accumulation can lead to an imbalance in the microbial ecosystem within the reactor. Furthermore, phenols and benzene compounds in chemical wastewater can easily combine with sludge to form more toxic complex pollutants, significantly impacting the stable operation of the system. Existing wastewater discharge devices, such as the screw conveyor structure mentioned in CN213012333U, can discharge some loose sludge, but they cannot completely remove the sticky sludge adhering to the inner wall of the sludge collection funnel. Long-term accumulation can easily cause blockage of the wastewater discharge pipe, affecting the operational stability of the device and increasing maintenance frequency and costs. While CN118724298B designs a sludge treatment mechanism, its specific implementation effect and the thoroughness of wastewater discharge still need to be verified.

[0006] 3. Poor adaptability to operating conditions, limiting practicality: The production scale and wastewater concentration vary significantly among different chemical enterprises. High-concentration chemical wastewater produces highly viscous sludge with high pollution intensity, making it difficult for conventional cleaning devices to remove stubborn sludge due to insufficient power. Meanwhile, in the low-flow wastewater treatment scenarios of small and medium-sized chemical enterprises, existing membrane bioreactor devices often suffer from problems such as large size, excessive energy consumption, and high cost, failing to meet the actual application needs of SMEs. Existing membrane bioreactor devices, such as CN118724298B and CN213012333U, while designed with wastewater treatment efficiency in mind, still need improvement in terms of operational adaptability, making it difficult to meet the needs of wastewater treatment scenarios of different scales and concentrations.

[0007] 4. Low level of automation and high labor costs: Existing membrane bioreactor (MBR) systems lack integrated automation in their cleaning and sludge discharge processes, requiring continuous operator monitoring. This not only increases labor costs but also increases the risk of human error leading to untimely cleaning and improper sludge discharge, impacting the long-term stable operation of the system. While CN213012333U mentions controllers for electrical connections to some equipment, the overall automation level remains limited, particularly in the integrated control of membrane cleaning and sludge discharge. Although CN118724298B incorporates a more complex cleaning mechanism, its automation effectiveness and integration with the overall system still require improvement.

[0008] Chemical wastewater, as one of the main pollutants generated during industrial production, is complex in composition and highly toxic, containing large amounts of recalcitrant organic pollutants such as phenols, benzenes, and heterocyclic compounds. Direct discharge can cause serious damage to water bodies, soil, and other ecological environments. Therefore, efficient treatment of chemical wastewater has become a key issue for the sustainable development of the chemical industry. Membrane bioreactor (MBR) technology, as a novel wastewater treatment system that organically combines separation and biological treatment technologies, has been widely used in the field of chemical wastewater treatment due to its unique advantages. However, the aforementioned technical limitations restrict its further promotion and application.

[0009] In summary, existing membrane bioreactors (MBRs) suffer from numerous drawbacks in chemical wastewater treatment, including low membrane cleaning efficiency, incomplete sludge discharge, poor adaptability to operating conditions, and insufficient automation. There is an urgent need to develop a membrane bioreactor that can achieve automatic and efficient cleaning of membrane modules, complete sludge discharge, and adaptability to different treatment scenarios, in order to address the pain points of existing technologies and promote the upgrading and optimization of chemical wastewater treatment technologies. Summary of the Invention

[0010] The technical problem this invention aims to solve is to provide a membrane bioreactor device and method for treating chemical wastewater, addressing the issues of membrane fouling and low sludge discharge efficiency in membrane bioreactors used in the field of chemical wastewater treatment. Specifically, after prolonged operation, traditional membrane bioreactors tend to accumulate large amounts of sludge and microbial metabolites on the membrane surface, leading to a decrease in membrane flux and reduced treatment efficiency. Furthermore, existing sludge discharge methods often rely on manual operation, which is inefficient and prone to clogging pipes.

[0011] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A membrane bioreactor and method for treating chemical wastewater are provided, as detailed below: (a) A membrane bioreactor for chemical wastewater A membrane bioreactor device for chemical wastewater includes a connecting box, in which a membrane bioreactor is fixedly connected. A swing cleaning structure is mounted on the connecting box, and a sewage discharge structure is fixedly connected to the bottom of the connecting box. A controller and a water pump are fixedly installed on the side wall of the connecting box, and an electromagnetic control valve is connected in series on the sewage discharge pipe at the bottom of the connecting box. All electrical components are electrically connected to the controller via wires, and the controller controls their operation.

[0012] 1. Oscillating cleaning structure The oscillating cleaning structure includes a drive motor, which is fixed to the end face of the connecting box via a connecting seat. The drive end of the drive motor is connected to a drive rod via a coupling. The drive rod is rotatably connected to the end face of the connecting box via a bearing seat. Both ends of the drive rod are connected to a driven helical gear via a driving helical gear. A drive shaft is fixedly connected to the center of the driven helical gear. The drive shaft is rotatably connected to the connecting box via a bearing seat. A turntable is fixedly connected to the side wall of the drive shaft. A connecting rod is rotatably connected to the turntable via a rotating shaft. The other end of the connecting rod is rotatably connected to an oscillating plate via a rotating shaft.

[0013] The other end of the swing plate is rotatably connected to a connecting rod via a rotating shaft, and the other end of the connecting rod is rotatably connected to a connecting plate via a rotating shaft. Both the swing plate and the connecting plate are fixedly connected to rotating shafts. The rotating shafts are rotatably connected to the connecting housing via bearing seats, and multiple sets of rotating shafts are connected in series via connecting rods and connecting plates. Their cross-section is a regular hexagonal structure. A movable sliding sleeve is fitted on the side wall of the rotating shaft. The movable sliding sleeve has a groove adapted to the rotating shaft, and the two are slidably connected. Connecting levers are symmetrically fixed on the side wall of the movable sliding sleeve.

[0014] A fixed sliding sleeve is fitted onto the connecting lever, which is fixed to the connecting housing. A spiral groove adapted to the connecting lever is opened on its side wall, and the two are fitted with a clearance fit. A swing nozzle is fixedly connected to the bottom of the movable sliding sleeve. A connecting sleeve is fitted to the bottom of the swing nozzle. A connecting hole adapted to the swing nozzle is opened on the connecting sleeve, and the two are fitted with a clearance fit. A water main is fixedly connected to the bottom of the connecting sleeve. One end of the water main is connected to the outlet of the water pump through a conduit.

[0015] 2. Sewage discharge structure The sewage discharge structure includes a sludge collection funnel, which is fixed to the bottom of the connecting box. A rotating motor is fixed to its side wall via a connecting seat. The rotating motor is electrically connected to the controller via a wire. Its drive end is connected to a drive rod via a coupling. The drive rod is rotatably connected to the sludge collection funnel via a bearing seat. A screw conveyor is symmetrically fixed to its side wall, and curved rods are fixedly connected to both sides of the screw conveyor on the drive rod.

[0016] Symmetrically connected to the side wall of the crank rod are connecting pull plates via rotating shafts. The other end of the connecting pull plates is connected to a connecting rotating rod via a rotating shaft. A movable slider is rotatably connected to the connecting rotating rod via a bearing. A fixed slide rail is fitted onto the movable slider. The fixed slide rail is fixed inside the mud collection funnel and has a groove adapted to the movable slider. The two are slidably connected. A rotating scraper is fixedly connected to the connecting rotating rod. A limit stop corresponding to the rotating scraper is fixed on the side wall of the movable slider for adjusting the tilt angle of the rotating scraper.

[0017] (ii) A membrane bioreactor method for chemical wastewater A membrane bioreactor method for chemical wastewater treatment, based on the above-described bioreactor method for chemical wastewater treatment, includes the following steps: Step 1: Membrane module cleaning After prolonged use of the membrane bioreactor, the drive motor and water pump are activated via the controller. The drive motor rotates, causing the drive rod to rotate. The drive rod, through the meshing of the active and driven helical gears, drives the drive shaft and turntable to rotate. The turntable pulls the swing plate to swing via the connecting rod. The swing plate, through the connecting rod and the connecting plate, drives multiple sets of rotating shafts to swing synchronously. When the rotating shaft swings, it causes the moving sleeve to swing. The connecting lever on the moving sleeve moves along the spiral groove of the fixed sleeve, thereby driving the swing nozzle to move up and down while swinging. The water pump delivers clean water through the main water channel and connecting sleeve to the swing nozzle, which sprays the water onto the membrane module of the membrane bioreactor, achieving thorough cleaning from all angles.

[0018] Step 2: Sludge discharge During the cleaning process, the controller starts the rotating motor and opens the solenoid control valve; the rotating motor drives the drive rod to rotate, which in turn drives the auger and crank rod to rotate; when the auger rotates, it transports the sludge in the sludge collection funnel to the center so that it can be discharged from the drain pipe; at the same time, the crank rod pulls the connecting rod and the movable slider along the fixed slide rail through the connecting pull plate, and the connecting rod drives the rotating scraper to move synchronously; when the rotating scraper moves downward, it is parallel to the inner wall of the sludge collection funnel under the action of the limit stop bar, and when it moves upward, it is perpendicular to the inner wall of the sludge collection funnel, scraping the sludge attached to the inner wall of the sludge collection funnel onto the auger, which then discharges it out of the device.

[0019] The present invention provides a membrane bioreactor and method for treating chemical wastewater, which has the following beneficial effects: 1. This invention effectively overcomes the core challenges of existing membrane bioreactors for treating chemical wastewater. Phenolic and benzene compounds in chemical wastewater easily cause a large amount of sludge to accumulate on the surface of membrane modules. Traditional methods of manually disassembling the device and cleaning it with a spray gun are time-consuming, labor-intensive, and affect treatment efficiency, also impacting system stability. However, the membrane bioreactor device and method for chemical wastewater provided by this invention achieves automatic and efficient cleaning of membrane modules and automatic sludge discharge, eliminating the need for manual disassembly, significantly improving the device's operating efficiency and stability, and substantially saving labor costs.

[0020] 2. The oscillating cleaning structure of this invention adopts a multi-stage transmission design, enabling the oscillating nozzle to move synchronously up and down, achieving all-round, thorough cleaning of the membrane modules of the membrane bioreactor. Compared with traditional manual cleaning, the cleaning is more thorough and complete, effectively avoiding the problem of sludge adhesion leading to a decrease in treatment efficiency, and greatly improving the working efficiency of the membrane bioreactor. Actual verification shows that the cleaning efficiency is improved by more than 60%.

[0021] 3. This invention achieves fully automated operation of membrane module cleaning and sludge discharge by uniformly controlling the operation of the swing cleaning structure, sewage discharge structure, and various electrical components through a controller. Operators only need to set parameters to start the entire process, solving the problems of time-consuming and labor-intensive traditional cleaning methods. Each batch of cleaning saves the workload of 2-3 operators, making it particularly suitable for routine maintenance in continuous production scenarios in chemical enterprises.

[0022] 4. In the sewage discharge structure of this invention, the rotating auger and rotating scraper work together. The rotating scraper removes sludge from the inner wall of the sludge collection funnel, while the rotating auger quickly and centrally discharges the sludge, effectively preventing sludge accumulation. The inverted conical sludge collection funnel and polished inner wall design accelerate the sludge's descent, preventing phenolic and benzene compounds in chemical wastewater from impacting the system due to sludge accumulation, ensuring long-term stable operation of the device and reducing the frequency of downtime maintenance.

[0023] 5. The various transmission components of this invention are connected through bearing seats, rotating shafts, and other structures, with reasonable clearances and precise motion transmission. Key components adopt a symmetrical design, improving structural stability and service life. Furthermore, the material specifications, transmission clearances, component strength, and other parameters can be adjusted according to different working conditions to adapt to various chemical wastewater scenarios, including conventional, high-concentration corrosive, and low-flow-rate wastewater. It can withstand complex corrosive and vibration environments, and its service life is 2 to 3 times longer than that of traditional devices.

[0024] 6. Through optimization of multiple embodiments, this invention forms a product system covering the treatment of chemical wastewater of different scales and concentrations. The basic model combines versatility and cost-effectiveness, suitable for conventional operating conditions; the high-concentration model upgrades components such as servo motors to adapt to highly corrosive and high-viscosity sludge scenarios; the small and medium-sized models feature a compact design and reduced energy consumption parameters, meeting the needs of low-flow wastewater treatment, reducing costs by more than 40%, and have wide adaptability, significantly improving the application range and practicality of the device.

[0025] 7. The composite motion of the oscillating cleaning structure and the adjustable water spray pressure design of this invention allow for adjustments to operating parameters based on the membrane module type, avoiding damage to the membrane surface caused by traditional high-pressure flushing. Buffer designs such as elastic connectors and soft rubber connecting sleeves reduce the impact of moving parts on membrane module vibration. The cleaning process leaves no chemical residue or allows the addition of neutral cleaning agents, preventing membrane module material aging. Practical application verification shows that the membrane module's service life is extended by more than 30% compared to traditional cleaning methods, reducing replacement costs.

[0026] 8. This invention employs precise parameter matching design, adjusting motor speed, water supply pressure, and running time according to different operating conditions to avoid energy waste. In low-flow conditions, a stepper motor and low-pressure water supply are used, reducing energy consumption by 40% compared to the basic model. In high-concentration conditions, enhanced transmission efficiency and jet pressure ensure cleaning effectiveness while reducing ineffective energy consumption. Wear-resistant materials and optimized transmission structure reduce component wear, extending the replacement cycle of membrane modules and core components, thus lowering equipment maintenance costs and consumable expenditures.

[0027] 9. This invention features an innovative oscillating cleaning structure design. Through a multi-stage coordinated mechanism including a drive motor, helical gear meshing, turntable-pull rod transmission, and spiral chute guidance, the oscillating nozzle achieves a composite motion of "oscillation + up-and-down movement." Combined with a precise spray design, it provides all-around rinsing of the membrane module. Different embodiments allow for parameter adjustments to adapt to the cleaning needs of sludge of varying viscosities. High-concentration conditions enable rapid removal of stubborn sludge, while regular conditions allow for efficient rinsing, ensuring membrane module permeability and improving treatment efficiency.

[0028] 10. The present invention features a synergistic design of a rotating auger and a rotating scraper in its sewage discharge structure. The rotating auger uses a reverse spiral or an increased lead design to quickly collect sludge. The rotating scraper moves reciprocally under the drive of the transmission mechanism, and its tilt angle is automatically switched by a limit stop bar, efficiently scraping sludge off the inner wall of the sludge collection funnel and preventing accumulation and clumping. This design solves the problem of sludge accumulation impacting the system, ensures stable operation of the device, and reduces maintenance frequency.

[0029] 11. This invention integrates a controller to achieve automated and coordinated operation of all components of the device, solving the problem that traditional membrane bioreactors require separate manual control of each component, which is prone to operational errors and poor coordination. By uniformly controlling components such as water pumps and electromagnetic control valves through the controller, parameters are automatically adjusted according to actual operating conditions, achieving intelligent operation of the device and reducing operating costs and operational complexity.

[0030] 12. The oscillating cleaning structure of this invention solves the problem that traditional manual cleaning is difficult to guarantee comprehensiveness and uniformity. It can precisely clean each part of the membrane according to a preset program, effectively remove sludge and microbial metabolites from the membrane surface, improve membrane life and treatment effect, ensure stable operation of membrane bioreactor, and avoid the problem of reduced treatment efficiency due to membrane fouling.

[0031] 13. The sewage discharge structure of this invention changes the situation of low efficiency and easy blockage of traditional manual sludge discharge. Through the coordinated action of rotating auger and rotating scraper, sludge is continuously and stably discharged, avoiding pipe blockage, improving sludge discharge efficiency and reliability, and reducing the cumbersome operation of manual sludge discharge and system failures caused by sludge discharge problems.

[0032] 14. This invention integrates a controller to reduce manual intervention, improve the automation level and operational stability of the device, and reduce operating costs. Traditional membrane bioreactors have low automation levels, and frequent manual intervention increases labor costs and is prone to errors, affecting device stability and treatment efficiency. This invention solves these problems through automated collaborative operation.

[0033] 15. The oscillating cleaning structure of this invention effectively removes fouling from the membrane surface, ensuring normal membrane permeability and allowing chemical wastewater to pass through the membrane more smoothly for separation and treatment, thus improving treatment efficiency and completing the chemical wastewater purification task faster. Actual operation data shows that the membrane flux after cleaning is significantly increased compared to traditional devices.

[0034] 16. The automated sewage discharge structure of this invention reduces the need for manual operation, lowers labor costs, and operators only need to periodically maintain and inspect the device. It also reduces membrane fouling and clogging, extends the service life of membrane modules, reduces membrane replacement frequency and costs, and further lowers operating costs.

[0035] 17. The automated control system of this invention automatically adjusts operating parameters according to actual conditions to ensure stable and reliable system operation. For example, it automatically adjusts the water pump flow and pressure when the load changes, and promptly activates the cleaning mechanism when the membrane fouling level reaches a certain level, enabling the system to adapt to different operating conditions and improving stability and reliability. Attached Figure Description

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the external structure of the device of the present invention. Figure 2 This is a schematic diagram of the internal structure of the overall structure of the device of the present invention; Figure 3 This is a schematic diagram of the overall structure of the swing cleaning structure of the present invention; Figure 4 This is a partial structural schematic diagram of the oscillating cleaning structure of the present invention; Figure 5 for Figure 4 Partial structural diagram; Figure 6 This is a schematic diagram of the overall structure of the sewage discharge structure of the present invention; Figure 7 This is a partial structural diagram of the sewage discharge structure of the present invention; In the diagram: 1. Connecting box; 2. Membrane bioreactor; 3. Swinging cleaning structure; 4. Sewage discharge structure; 5. Controller; 6. Water pump; 7. Electromagnetic control valve; 8. Drive motor; 301. Drive rod; 302. Active helical gear; 303. Driven helical gear; 304. Drive shaft; 305. Turntable; 306. Connecting rod; 307. Swinging plate; 308. Connecting rod; 309. Connecting plate; 310. Rotating shaft; 311. Moving sleeve; 312. Connecting lever; 313. Fixed sleeve; 314. Spiral chute; 315. Swinging nozzle; 316. Connecting sleeve; 317. Main waterway; 318. Sludge collection funnel; 401. Rotating motor; 402. Drive rod; 403. Screwdriver; 404. Curved rod; 405. Connecting pull plate; 406. Connecting rod; 407. Moving slider; 408. Fixed slide rail; 409. Rotating scraper; 410. Limiting stop bar; 411. Detailed Implementation

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments: Example 1 like Figures 1 to 7 As shown in the figure, this embodiment provides a membrane bioreactor for chemical wastewater treatment, the structure of which is described in detail below with reference to the accompanying drawings: like Figure 1 As shown, this embodiment provides a membrane bioreactor for chemical wastewater. Its isotropic structure clearly demonstrates the assembly layout of the core components: the connecting box 1 serves as the installation base for the entire device and is made of stainless steel to ensure corrosion resistance and structural strength; the swing cleaning structure 3 is installed on the front end of the connecting box 1, the sewage discharge structure 4 is fixed to the bottom of the connecting box 1 by welding, the controller 5 and the water pump 6 are mounted side by side on the right side wall of the connecting box 1, and both are fixed to the connecting box 1 by bolts; the drive motor 301 is fixed to the middle position of the front end of the connecting box 1 by connecting seat bolts, and the rotating motor 402 is installed on the left side wall of the sludge collection funnel 401 by connecting seat. The overall layout is compact and reasonable, and easy to maintain.

[0038] like Figure 2 As shown, the core structure of the inner cavity of the connecting box 1 can be directly observed through the cross-sectional structure: the membrane bioreactor 2 is vertically fixed to the middle of the inner cavity of the connecting box 1 by bolts, and its membrane modules are distributed in an array to ensure full contact with the chemical wastewater; the bottom of the connecting box 1 is integrally welded with the sludge collection funnel 401, which has an inverted conical structure to facilitate sludge collection; the sewage pipe at the bottom of the connecting box 1 extends vertically downward, and the electromagnetic control valve 7 is connected to the middle of the sewage pipe through a flange to precisely control the opening and closing of the sewage channel.

[0039] like Figure 3As shown, the oscillating cleaning structure 3 is a multi-component collaborative transmission cleaning mechanism, comprising a drive motor 301, a drive rod 302, a driving helical gear 303, a driven helical gear 304, a drive shaft 305, a turntable 306, a connecting rod 307, an oscillating rotating plate 308, a connecting rod 309, a connecting rotating plate 310, a rotating shaft 311, a moving sliding sleeve 312, a connecting lever 313, a fixed sliding sleeve 314, an oscillating spray nozzle 316, a connecting sleeve 317, and a main water channel 318. The drive rod 302 is horizontally arranged, with both ends rotatably connected to the front end of the connecting housing 1 via bearing seats. The driving helical gear 303 is fixed to both ends of the drive rod 302 via a flat key, forming a meshing transmission pair with the driven helical gear 304 to ensure vertical power transmission. The main water channel 318 is horizontally arranged along the bottom of the connecting housing 1, with one end connected to the outlet flange of the water pump 6 via a conduit, and the other end closed to ensure stable delivery of clean water.

[0040] like Figure 4 As shown, the core transmission component of the oscillating cleaning structure 3 is highlighted: the turntable 306 is fixed to the end of the drive shaft 305 via a flat key; one end of the connecting rod 307 is rotatably connected to the edge of the turntable 306 via a rotating shaft, and the other end is rotatably connected to the center of the oscillating plate 308 via a rotating shaft; one end of the oscillating plate 308 is hinged to the connecting rod 309 via a rotating shaft, and the other end of the connecting rod 309 is also connected to the connecting plate 310 via a rotating shaft; multiple sets of rotating shafts 311 are connected in series via connecting rods 309 and connecting plates 310 to form a synchronous transmission link, ensuring that all oscillating nozzles 316 move in unison. Fixed sleeves 314 are vertically fixed to the inner wall of the connecting housing 1 by bolts, their number corresponding one-to-one with the rotating shafts 311, providing guide support for the connecting lever 313.

[0041] like Figure 5 As shown, the motion drive structure of the oscillating nozzle 316 is illustrated in detail: the cross-section of the rotating shaft 311 is a regular hexagonal structure, and the inner wall of the movable sleeve 312 is provided with a regular hexagonal groove adapted to the rotating shaft 311. The two achieve synchronous rotation and axial movement through sliding cooperation; the connecting lever 313 is symmetrically welded to both sides of the movable sleeve 312, and its end is embedded in the spiral groove 315 on the side wall of the fixed sleeve 314. The spiral angle of the spiral groove 315 is 30°, ensuring that the connecting lever 313 can synchronously drive the movable sleeve 312 to move up and down when it moves along the groove; the oscillating nozzle 316 is vertically welded to the bottom of the movable sleeve 312, and its top is evenly provided with water spray holes. The bottom is fitted into the connecting hole of the connecting sleeve 317 through clearance fit. The connecting sleeve 317 is connected to the main water channel 318 to ensure a continuous supply of clean water during the movement of the oscillating nozzle 316.

[0042] like Figure 6As shown, the overall structure of the sewage discharge structure 4 includes a sludge collection funnel 401, a rotating motor 402, a drive rod 403, an auger 404, a curved rod 405, a connecting pull plate 406, a connecting rod 407, a movable slider 408, a fixed slide rail 409, a rotating scraper 410, and a limit stop bar 411. The drive rod 403 horizontally passes through the middle of the sludge collection funnel 401 and is rotatably connected to the sludge collection funnel 401 through bearing seats at both ends; the auger 404 is symmetrically fixed to the middle area of ​​the drive rod 403 by welding, with opposite spiral directions to ensure that the sludge on both sides can be collected towards the middle; the curved rod 405 is fixed to the drive rod 403 by a flat key and is located on both sides of the auger 404, symmetrically distributed.

[0043] like Figure 7 As shown, the sludge scraping transmission part of the sewage discharge structure 4 is as follows: the end of the crank 405 is hinged to one end of the connecting pull plate 406 via a rotating shaft, and the other end of the connecting pull plate 406 is rotatably connected to the middle of the connecting rotating rod 407 via a rotating shaft; the two ends of the connecting rotating rod 407 are rotatably connected to the movable slider 408 via bearings, the movable slider 408 is sleeved on the fixed slide rail 409, the fixed slide rail 409 is vertically welded to the inner wall of the sludge collection funnel 401, and its groove is adapted to the movable slider 408 to ensure the smooth sliding of the movable slider 408; the rotating scraper 410 is fixed to the outside of the connecting rotating rod 407 by bolts, and is made of wear-resistant rubber material, which fits against the inner wall of the sludge collection funnel 401; the limiting stop 411 is welded to the side wall of the movable slider 408, corresponding to the inner side of the rotating scraper 410, and the automatic switching of the tilt angle of the rotating scraper 410 is realized through mechanical limiting.

[0044] Example 2 In another preferred embodiment, based on Embodiment 1, this embodiment provides a membrane bioreactor method for chemical wastewater. Based on the structural design of the membrane bioreactor device for chemical wastewater described in Embodiment 1, it achieves automated operation of membrane module cleaning and sludge discharge. The specific steps are as follows: Step 1: Membrane module cleaning After membrane bioreactor 2 has been running continuously for 72 hours, a large amount of sludge adheres to the surface of the membrane module, requiring the initiation of a cleaning process. For example... Figure 1 As shown, a cleaning command is input through the controller 5 connected to the side wall of the housing 1. The controller 5 outputs an electrical signal to start the drive motor 301 and the water pump 6 respectively. The operating speed of the drive motor 301 is set to 80 r / min, and the water supply pressure of the water pump 6 is adjusted to 0.4 MPa to ensure cleaning effect and water resource utilization rate.

[0045] like Figure 3 As shown, the drive end of the drive motor 301 drives the drive rod 302 to rotate via a coupling, and the active helical gears 303 at both ends of the drive rod 302 rotate synchronously (as shown). Figure 4As shown), due to the meshing of the driving helical gear 303 and the driven helical gear 304, power is transmitted vertically in a directional manner, driving the driven helical gear 304 and the central drive shaft 305 to rotate. When the drive shaft 305 rotates, the end plate 306 rotates synchronously, pulling the swing plate 308 to swing back and forth around its hinge point via the connecting rod 307; the swing plate 308 drives the connecting plate 310 to swing via the connecting rod 309, thereby driving multiple sets of rotating shafts 311 to swing back and forth synchronously (as shown). Figure 4 As shown), the swing angle range is ±45° to ensure comprehensive cleaning coverage.

[0046] like Figure 5 As shown, when the rotating shaft 311 swings, it engages with the regular hexagonal groove of the movable sliding sleeve 312, causing the movable sliding sleeve 312 to swing synchronously. At the same time, the connecting levers 313 on both sides of the movable sliding sleeve 312 move along the spiral groove 315 of the fixed sliding sleeve 314. Under the guidance of the spiral structure, the connecting levers 313 drive the movable sliding sleeve 312 to move up and down along the axis of the rotating shaft 311, with a moving stroke of 15cm, realizing the composite motion of "swinging + up and down movement" of the swing nozzle 316. The water pump 6 delivers clean water (with an appropriate amount of neutral detergent added) through the conduit to the main water channel 318, and then distributes it to each swing nozzle 316 through the connecting sleeve 317. The clean water is sprayed out at high speed from the spray hole at the top of the swing nozzle 316, which thoroughly flushes the membrane module of the membrane bioreactor 2. After 15 minutes of continuous cleaning, the controller 5 automatically shuts off the drive motor 301 and the water pump 6, completing the cleaning of the membrane module.

[0047] Step 2: Sludge discharge During the membrane module cleaning process, the sludge generated by rinsing falls into the sludge collection funnel 401 with the water flow, and the sludge discharge process needs to be started simultaneously. For example... Figure 1 As shown, when the cleaning process is started, the controller 5 outputs an electrical signal to start the rotating motor 402 and opens the solenoid control valve 7. The rotating motor 402 runs in alternating directions of forward and reverse for 30 seconds to ensure that the sludge is completely discharged.

[0048] like Figure 6 As shown, the drive end of the rotating motor 402 drives the drive rod 403 to rotate through the coupling. The drive rod 403 synchronously drives the auger 404 in the middle and the crank rods 405 on both sides to rotate. The reverse spiral structure of the auger 404 gathers the sludge on both sides of the sludge collection funnel 401 towards the middle sewage pipe, preparing for discharge.

[0049] like Figure 7As shown, when the crank 405 rotates, it pulls the connecting rod 407 to reciprocate through the connecting pull plate 406. The connecting rod 407 drives the movable sliders 408 at both ends to slide up and down along the fixed slide rail 409. When the movable slider 408 slides down, the inner side of the rotating scraper 410 contacts the limit stop 411. Under the blocking action of the limit stop 411, the rotating scraper 410 remains parallel to the inner wall of the sludge funnel 401 and descends smoothly. When the movable slider 408 slides up, the rotating scraper 410 is freed from the constraint of the limit stop 411. Under the resistance of the sludge and its own gravity, it automatically switches to a state perpendicular to the inner wall of the sludge funnel 401. During the upward movement, it scrapes off the sludge attached to the inner wall of the sludge funnel 401. The scraped sludge falls onto the auger 404 and is transported by the auger 404 to the sewage pipe, and discharged from the device through the opened electromagnetic control valve 7. After the cleaning process is completed, controller 5 shuts off the rotating motor 402 and the solenoid control valve 7, thus completing the sludge discharge.

[0050] Example 3 In another preferred embodiment, based on embodiment 1, such as Figure 1 As shown, this embodiment provides a membrane bioreactor for chemical wastewater treatment, which is suitable for high-concentration phenolic chemical wastewater treatment scenarios. The overall structure has been optimized in terms of materials and transmission precision compared to the basic model.

[0051] The connecting box 1 is made of fiberglass in one piece, which is more resistant to corrosion than stainless steel and is 30% lighter, making it easier to install on site. The swing cleaning structure 3 is fixed to the front end of the connecting box 1 through a reinforced connecting seat. The drive motor 301 is a servo motor with a rated power of 1.5kW to ensure power output under complex working conditions. The sewage discharge structure 4 is connected to the connecting box 1 by a flange. The detachable design facilitates the maintenance of internal components. The rotating motor 402 is installed on the right side wall of the sludge collection funnel 401, forming a symmetrical layout with the left side, improving the balance of force on the lifting device.

[0052] like Figure 2 As shown, the membrane module of membrane bioreactor 2 is made of ceramic membrane material, which has stronger resistance to fouling. Its mounting frame is fixed to the inner wall of the connecting box 1 through elastic connectors to reduce the impact of vibration during operation. The cone angle of the sludge collection funnel 401 is designed to be 60°, which is more conducive to the rapid sludge sliding down compared to the basic model of 45°. The sewage discharge pipe is made of seamless steel pipe, and the electromagnetic control valve 7 is selected as explosion-proof type to meet the explosion-proof requirements of chemical workshops.

[0053] like Figure 3As shown, the drive rod 302 of the swing cleaning structure 3 is made of alloy steel and its surface is heat-treated to increase its hardness to HRC35~40, thus extending its service life. The main water pipe 318 is made of PE (Polyethylene), which is corrosion-resistant and lightweight. A pressure-stabilizing valve is installed on the connecting pipe between it and the outlet of the water pump 6 to ensure stable water supply pressure. The meshing surfaces of the driving helical gear 303 and the driven helical gear 304 are carburized, increasing the transmission efficiency to over 95%.

[0054] like Figure 4 As shown, a self-lubricating bearing is installed at the connection between the connecting rod 307 and the swing plate 308 to reduce friction loss; multiple sets of rotating shafts 311 are connected in series through the connecting rod 309 and the connecting plate 310, and the distance between each set of rotating shafts 311 is reduced to 15cm to ensure that the cleaning coverage of the swing nozzle 316 is without blind spots; the fixed sliding sleeve 314 is made of aluminum alloy, which reduces the overall weight while ensuring structural strength.

[0055] like Figure 5 As shown, the cross-section of the rotating shaft 311 is still a regular hexagonal structure, but the side length is increased to 20mm, and the clearance between it and the moving sleeve 312 is controlled at 0.05mm, significantly improving the transmission accuracy; the spiral groove 315 has a spiral angle of 45°, compared to the basic model's 30°, which increases the up-and-down movement speed of the swing nozzle 316 by 25%, resulting in higher cleaning efficiency; the water spray holes of the swing nozzle 316 adopt a fan-shaped nozzle design, expanding the spray angle to 60°, increasing the coverage area of ​​a single nozzle by 40%, and adding a wear-resistant bushing to the inner wall of the connecting sleeve 317 to avoid water leakage caused by long-term friction.

[0056] like Figure 6 As shown, the drive rod 403 of the sewage discharge structure 4 is fixed with a double-support bearing seat, and the axial movement error is controlled within 0.1mm; the spiral lead of the auger 404 is increased to 80mm, the sludge conveying efficiency is increased by 50%, and its blades are treated with wear-resistant alloy welding, extending the service life by 2 times; the eccentricity of the crank 405 is adjusted to 30mm, which increases the pulling stroke of the connecting pull plate 406 and drives the rotating scraper 410 to move a wider range.

[0057] like Figure 7 As shown, the connecting bearing between the connecting rod 407 and the movable slider 408 is a sealed deep groove ball bearing to prevent sludge from entering and causing jamming; the fixed slide rail 409 is a stainless steel guide rail with a polished surface, reducing sliding friction by 15%; the rotating scraper 410 is made of polyurethane material with a thickness increased to 10mm, improving its fit with the inner wall of the sludge collection funnel 401; and a rubber buffer pad is added to the end of the limit stop 411 to reduce impact wear when the rotating scraper 410 switches angles.

[0058] Example 4 In another preferred embodiment, based on embodiments 1 to 3, this embodiment provides a membrane bioreactor method for chemical wastewater treatment. Based on the structural design of a membrane bioreactor device for chemical wastewater described in embodiment 3, it achieves automated operation of membrane module cleaning and sludge discharge, adapting to high-concentration chemical wastewater treatment scenarios. The specific steps are as follows: Step 1: Membrane module cleaning After membrane bioreactor 2 has been running continuously for 48 hours, high-viscosity sludge easily adheres to the surface of the ceramic membrane, requiring the initiation of an enhanced cleaning process. For example... Figure 1 As shown, the cleaning mode is set to "high intensity mode" by the controller 5. The controller 5 outputs a signal to start the drive motor 301 and the water pump 6. The running speed of the drive motor 301 is set to 100 r / min, which is 25% higher than the basic model. The water supply pressure of the water pump 6 is adjusted to 0.5 MPa. At the same time, the pressure regulating valve on the conduit is opened to ensure that the water supply pressure fluctuation does not exceed ±0.02 MPa.

[0059] like Figure 3 As shown, the servo drive motor 301 drives the drive rod 302 to rotate at high speed through a coupling. The driving helical gears 303 at both ends of the drive rod 302 mesh precisely with the driven helical gears 304 (e.g., Figure 4 As shown), power is transmitted to the drive shaft 305, causing the turntable 306 to rotate rapidly. Driven by the turntable 306, the connecting rod 307 pulls the swing plate 308 to swing back and forth at high frequency. Through the connecting rod 309 and the connecting plate 310, the power is transmitted to make the four sets of rotating shafts 311 swing synchronously, and the swing angle is expanded to ±50°, covering the edge area of ​​the membrane module.

[0060] like Figure 5 As shown, when the rotating shaft 311 swings, the moving sleeve 312 swings synchronously with it. The connecting levers 313 on both sides move rapidly along the 45° spiral groove 315, driving the moving sleeve 312 to move up and down along the axis of the rotating shaft 311. The moving stroke is kept at 15cm, but the moving speed is increased to 0.8cm / s, realizing the composite motion of "high-frequency swing + rapid lifting" of the swing nozzle 316. The water pump 6 delivers cleaning water with 1% neutral degreasing agent to the water channel main pipe 318, which is then distributed to each swing nozzle 316 through the connecting sleeve 317. The high-speed water flow sprayed from the fan-shaped nozzle forms a strong flush on the high-viscosity sludge on the ceramic membrane surface. After cleaning for 20 minutes, the controller 5 controls the water pump 6 to turn off first, and the drive motor 301 continues to run for 5 minutes to complete the secondary rinsing using the residual water. Then the drive motor 301 is turned off, and the cleaning process ends.

[0061] Step 2: Sludge discharge The high-concentration sludge produced during cleaning has a low water content, requiring enhanced sludge removal capabilities. For example... Figure 1As shown, when the cleaning process is started, the controller 5 starts the rotating motor 402 and opens the explosion-proof electromagnetic control valve 7. The rotating motor 402 adopts a forward and reverse alternating operation mode, shortening the cycle to 20 seconds to ensure that the sludge does not clump.

[0062] like Figure 6 As shown, the rotating motor 402 drives the drive rod 403 to rotate, which in turn drives the auger 404 to rotate at high speed. The spiral blades with increased lead quickly collect the sludge in the sludge collection funnel 401 towards the central discharge pipe. At the same time, the crank rod 405 on the drive rod 403 rotates synchronously, pulling the connecting rod 407 (as shown in the diagram) through the connecting pull plate 406. Figure 7 As shown, the movable slider 408 slides rapidly back and forth along the polished fixed slide rail 409. When the movable slider 408 slides downward, the rotating scraper 410, blocked by the limit stop bar 411, is parallel to the inner wall of the sludge collection funnel 401 and slides smoothly downward; when sliding upward, the rotating scraper 410 switches to a vertical state, and the polyurethane scraper closely adheres to the inner wall of the funnel, scraping off the attached dry and hardened sludge. The scraped sludge is quickly transported to the drain pipe by the auger 404 and discharged from the device through the electromagnetic control valve 7. After the cleaning process is completed, the rotating motor 402 continues to run for 3 minutes to ensure that there is no residual sludge in the sludge collection funnel 401, and then the controller 5 shuts off the rotating motor 402 and the electromagnetic control valve 7.

[0063] Example 5 In another preferred embodiment, based on embodiment 1, such as Figure 1 As shown, this embodiment provides a membrane bioreactor for chemical wastewater treatment, designed for the low-flow wastewater treatment needs of small and medium-sized chemical enterprises. It features a compact structure and lower energy consumption.

[0064] The connecting housing 1 is made of carbon steel with rubber lining, reducing costs by 40%, while the rubber lining is 5mm thick to ensure corrosion resistance; the drive motor 301 of the swing cleaning structure 3 is a stepper motor with a rated power of 0.8kW, suitable for low-load operation; the sewage discharge structure 4 is integrated into the bottom of the connecting housing 1, reducing its volume by 25%, and the rotating motor 402 is a micro geared motor, making the installation space more compact; the controller 5 and the water pump 6 are embedded and flush with the side wall of the connecting housing 1, reducing the space occupied.

[0065] like Figure 2 As shown, the membrane module of membrane bioreactor 2 is a hollow fiber membrane, reducing the number of installations to 60% of the basic model, and is suitable for low-flow wastewater treatment; the cone angle of the sludge collection funnel 401 is 50°, the diameter of the bottom drain pipe is reduced to 50mm, and the electromagnetic control valve 7 is a miniature electromagnetic valve with a faster response speed; the mounting frame of membrane bioreactor 2 adopts a detachable design, which facilitates the replacement and cleaning of membrane modules.

[0066] like Figure 3As shown, the drive rod 302 of the swing cleaning structure 3 is made of seamless steel pipe, which reduces its weight. A dust cover is installed at the connection between the rod and the bearing housing to prevent wastewater vapor from entering. The main water pipe 318 is made of PVC (Polyvinyl Chloride), which is cheaper and is connected to the connecting sleeve 317 by a socket joint, making installation convenient. The module of the driving helical gear 303 and the driven helical gear 304 is reduced to match the low-speed operation characteristics of the stepper motor.

[0067] like Figure 4 As shown, the length of the connecting rod 307 is shortened to 80% of the basic model, and the size of the swing plate 308 is correspondingly reduced, making the transmission mechanism more compact; the number of rotating shafts 311 is set to 4 sets, evenly distributed above the membrane bioreactor 2 to ensure uniform cleaning coverage; the connection between the connecting rod 309 and the connecting plate 310 is fixed with elastic pins, which is convenient for disassembly.

[0068] like Figure 5 As shown, the spiral angle of the spiral groove 315 is designed to be 25°, which slows down the up-and-down movement speed of the oscillating nozzle 316 to 0.3cm / s, reducing the impact on the membrane module; the clearance between the moving sleeve 312 and the rotating shaft 311 is increased to 0.1mm, reducing the processing accuracy requirements and further reducing the cost; the water spray hole of the oscillating nozzle 316 is circular, and the diameter is reduced to 1mm, which increases the water flow impact force; the connecting sleeve 317 is made of soft rubber material to adapt to the movement deformation of the oscillating nozzle 316.

[0069] like Figure 6 As shown, the diameter of the drive rod 403 of the sewage discharge structure 4 is reduced to 25mm, and the blade width of the auger 404 is reduced to adapt to low-flow sludge discharge; the eccentricity of the crank 405 is 20mm, and the pulling stroke is moderate to avoid excessive energy consumption; the inner wall of the sludge collection funnel 401 is polished to reduce sludge adhesion.

[0070] like Figure 7 As shown, the length of the connecting rod 407 is shortened, the volume of the moving slider 408 is reduced, the fixed slide rail 409 adopts a small guide rail with low sliding resistance; the rotating scraper 410 adopts a thin stainless steel plate with a thickness of 3mm, which is lightweight and moves more flexibly; the limit stop bar 411 is fixed with bolts and its height can be adjusted to meet the needs of sludge scraping of different thicknesses.

[0071] Example 6 In another preferred embodiment, based on embodiments 1, 2, and 5, this embodiment provides a membrane bioreactor method for chemical wastewater. Based on the structural design of a membrane bioreactor device for chemical wastewater described in embodiment 3, it achieves automated operation of membrane module cleaning and sludge discharge, adapting to the low-flow, low-concentration chemical wastewater treatment scenarios of small and medium-sized chemical enterprises. Its core advantages are energy saving and convenience. The specific steps are as follows: Step 1: Membrane module cleaning After membrane bioreactor 2 has been running continuously for 96 hours, a small amount of sludge adheres to the surface of the hollow fiber membrane, triggering an energy-saving and cleaning process. For example... Figure 1 As shown, the cleaning mode is set to "energy saving mode" by the embedded controller 5. The controller 5 outputs a signal to start the stepper drive motor 301 and the small water pump 6. The running speed of the drive motor 301 is set to 60 r / min, and the water supply pressure of the water pump 6 is adjusted to 0.3 MPa, which reduces energy consumption by 40% compared to the basic model.

[0072] like Figure 3 As shown, the stepper motor drives the drive rod 302 to rotate slowly, and the driving helical gear 303 at both ends of the drive rod 302 meshes smoothly with the driven helical gear 304 (as shown). Figure 4 As shown, the drive shaft 305 and turntable 306 are driven to rotate slowly; the connecting rod 307 pulls the swing plate 308 to swing slowly, which is transmitted through the connecting rod 309 and the connecting plate 310. The four sets of rotating shafts 311 swing back and forth synchronously, with an swing angle of ±30°, to avoid excessive swinging and energy waste.

[0073] like Figure 5 As shown, when the rotating shaft 311 swings, the moving sleeve 312 swings slowly with it, and the connecting lever 313 moves slowly along the 25° spiral groove 315, driving the swing nozzle 316 to move slowly up and down while swinging, with a moving stroke of 12cm; the water pump 6 delivers clean water to the swing nozzle 316 through the water channel main pipe 318 and the connecting sleeve 317, and the high-speed water flow sprayed from the circular water nozzle precisely washes the sludge on the surface of the hollow fiber membrane, shortening the cleaning time to 10 minutes. Then the controller 5 shuts down the water pump 6 and the drive motor 301 in sequence to complete the energy-saving cleaning.

[0074] Step 2: Sludge discharge Low-flow wastewater treatment produces less sludge, so a low-energy sludge discharge mode is adopted. For example... Figure 1 As shown, controller 5 starts the micro geared rotary motor 402 and opens the micro electromagnetic control valve 7 one minute after the cleaning process starts. The rotary motor 402 adopts a one-way rotation mode with a speed of 40 r / min to reduce the motor load.

[0075] like Figure 6As shown, the rotating motor 402 drives the drive rod 403 to rotate in one direction, which in turn drives the auger 404 to rotate slowly, conveying a small amount of sludge from the sludge collection funnel 401 to the intermediate sewage pipe; at the same time, the crank rod 405 on the drive rod 403 rotates synchronously, pulling the connecting rod 407 (as shown in the diagram) through the connecting pull plate 406. Figure 7 As shown, the movable slider 408 is driven to slowly reciprocate along the small fixed slide rail 409. The rotating scraper 410 moves with the movable slider 408, sliding downwards parallel to the inner wall of the sludge collection funnel 401, and sliding upwards perpendicular to the limit stop 411, scraping off a small amount of sludge adhering to the inner wall of the funnel. The scraped sludge is conveyed by the auger 404 and discharged from the device through the micro electromagnetic control valve 7. After the cleaning process is completed, the rotating motor 402 continues to run for 1 minute to ensure no sludge residue remains. Then, the controller 5 shuts off the rotating motor 402 and the electromagnetic control valve 7, completing the sludge discharge process.

[0076] In a preferred embodiment, the oscillating cleaning structure 3 includes a drive motor 301, which is mounted on the end face of the connecting housing 1 via a connecting seat. The drive end of the drive motor 301 is connected to a drive rod 302 via a coupling. Both ends of the drive rod 302 are connected to a driven helical gear 304 via a driving helical gear 303. A drive shaft 305 is mounted at the center of the driven helical gear 304, and a turntable 306 is mounted on the drive shaft 305. A connecting rod 307 is connected to one side of the turntable 306, and the other end of the connecting rod 307 is connected to an oscillating rotating plate 308. The above configuration enables stable transmission of the cleaning structure, ensures precise oscillation, expands the cleaning range, effectively removes dirt from inside the housing, improves equipment cleanliness, and extends equipment lifespan.

[0077] In a preferred embodiment, the other end of the swing plate 308 is connected to a connecting rod 309, and the other end of the connecting rod 309 is connected to a connecting plate 310. Both the swing plate 308 and the connecting plate 310 are connected to a rotating shaft 311. A movable sliding sleeve 312 is mounted on the rotating shaft 311. Connecting levers 313 are symmetrically mounted on the sidewalls of the movable sliding sleeves 312. A fixed sliding sleeve 314 is mounted on the connecting lever 313. The fixed sliding sleeve 314 is connected to the connecting housing 1. A spiral groove 315 is provided on the side wall of 4, corresponding to the connecting lever 313. A swing spray pipe 316 is installed at the bottom of the movable sliding sleeve 312. The bottom of the swing spray pipe 316 is connected to the connecting sleeve 317. The bottom of the connecting sleeve 317 is connected to the main water channel 318. One end of the main water channel 318 is connected to the outlet of the water pump 6 through a conduit. The above configuration allows the swing spray pipe 316 to move flexibly, expand the spray range, improve cleaning efficiency, and ensure that all areas inside the box are thoroughly rinsed.

[0078] In the preferred embodiment, the water pump 6, the electromagnetic control valve 7, and the drive motor 301 are all electrically connected to the controller 5 via wires; the drive rod 302 is rotatably mounted on the end face of the connecting housing 1 via a bearing seat, and the drive shaft 305 is rotatably connected to the connecting housing 1 via a bearing seat; the above configuration facilitates centralized control of equipment operation, realizes automated operation, and at the same time ensures flexible rotation of each component, reduces wear, lowers the failure rate, and improves the stability of equipment operation.

[0079] In a preferred embodiment, the sewage discharge structure 4 includes a sludge collection funnel 401, which is installed at the bottom of the connecting box 1. One end of the sludge collection funnel 401 is connected to a rotating motor 402 via a connecting seat. The drive end of the rotating motor 402 is connected to a drive rod 403 via a coupling. An auger 404 is symmetrically mounted on the drive rod 403. A crank 405 is mounted on the drive rod 403 and on both sides of the auger 404. A connecting pull plate 406 is symmetrically mounted on the crank 405. The other end of the connecting pull plate 406 is connected to the connecting rod 403. The connecting rod 407 is equipped with a movable slider 408, and a fixed slide rail 409 is installed on the movable slider 408. The fixed slide rail 409 is connected to the sludge collection funnel 401. The connecting rod 407 is equipped with a rotating scraper 410. A limit stop bar 411 is provided on the side wall of the movable slider 408 and corresponding to the rotating scraper 410. The above configuration can efficiently collect and discharge sludge, the auger 404 can quickly transport sludge, and the rotating scraper 410 can prevent sludge accumulation, ensure smooth sewage discharge, avoid blockage, and maintain normal operation of the equipment.

[0080] In a preferred embodiment, the rotating motor 402 is electrically connected to the controller 5 via a wire; the drive rod 403 is rotatably connected to the sludge collection funnel 401 via a bearing seat; the crank rod 405 is rotatably connected to the connecting pull plate 406; the connecting pull plate 406 is rotatably connected to the connecting rod 407; the connecting rod 407 is rotatably connected to the movable slider 408 via a bearing; and the movable slider 408 is slidably connected to the fixed slide rail 409. This configuration enables automated control of the sewage discharge structure, allows for flexible rotation and sliding of each component, reduces energy loss, improves sewage discharge efficiency, and ensures long-term stable operation of the equipment.

[0081] In the preferred embodiment, the transmission process in step 1 is specifically as follows: the drive motor 301 drives the drive rod 302 to rotate, the drive rod 302 drives the driven helical gear 304 to rotate through the active helical gear 303, the driven helical gear 304 drives the drive shaft 305 and the turntable 306 to rotate, the turntable 306 drives the swing plate 308 to swing through the connecting rod 307, the swing plate 308 drives multiple sets of rotating shafts 311 to swing through the connecting rod 309 and the connecting plate 310, the rotating shafts 311 drive the moving sleeve 312 to swing, the connecting lever 313 on the moving sleeve 312 moves along the spiral groove 315 of the fixed sleeve 314, thereby driving the swing nozzle 316 to move up and down; with the above settings, the transmission process is stable and reliable, and the components work together to enable the swing nozzle 316 to move in all directions, enhancing the cleaning effect and improving the cleaning quality of the equipment.

[0082] In the preferred embodiment, the transmission process in step 2 is as follows: the rotating motor 402 drives the drive rod 403 to rotate, and the drive rod 403 simultaneously drives the auger 404 and the crank rod 405 to rotate. The crank rod 405 drives the connecting rod 407 and the movable slider 408 to move along the fixed slide rail 409 through the connecting pull plate 406. The connecting rod 407 drives the rotating scraper 410 to move. When the rotating scraper 410 moves downward, it is parallel to the sludge collection funnel 401 under the action of the limit stop rod 411. When it moves upward, it is perpendicular to the sludge collection funnel 401. With the above settings, the transmission is smooth, and the auger 404 can simultaneously transport sludge and the rotating scraper 410 can clean sludge, effectively preventing sludge residue, improving sewage discharge efficiency, and ensuring the cleanliness of the equipment.

[0083] In a preferred embodiment, multiple sets of rotating shafts 311 are sequentially connected by connecting rods 309 and connecting plates 310. The cross-section of the rotating shaft 311 is a regular hexagonal structure, and the movable sleeve 312 is slidably connected to the rotating shaft 311. With the above arrangement, the regular hexagonal structure makes the connection between the rotating shaft 311 and the movable sleeve 312 tighter and the transmission more stable. Multiple sets of rotating shafts 311 work together to expand the swing range, enhance cleaning ability, and improve the overall performance of the equipment.

[0084] In summary, this invention proposes a membrane bioreactor device and method for treating chemical wastewater, effectively solving the core problems existing in current membrane bioreactors for treating chemical wastewater. Phenolic and benzene compounds in chemical wastewater easily lead to the adhesion of large amounts of sludge to the surface of the membrane modules. Traditional cleaning methods require manual disassembly of the device and cleaning with a spray gun, which is not only time-consuming and labor-intensive but also affects treatment efficiency. Furthermore, sludge accumulation can disrupt the stable operation of the system. The solution provided by this invention achieves automatic and efficient cleaning of the membrane modules and automatic sludge discharge, eliminating the need for manual disassembly, improving the operating efficiency and stability of the device, and saving labor costs.

[0085] In terms of specific structure, the oscillating cleaning structure 3 uses a drive motor 301 to drive a turntable 306 on a drive shaft 305 through a multi-stage gear transmission via an active helical gear 303 and a driven helical gear 304. This, along with connecting rods 307 and other components, enables the oscillating nozzle 316 to move up and down. This multi-stage transmission combined with the oscillating nozzle 316 differs from common single-transmission methods, allowing for a more flexible and wider cleaning range. Simultaneously, through a complex transmission design, the rotational motion of the drive motor 301 is converted into the up-and-down oscillating motion of the oscillating nozzle 316, achieving large-area, all-around cleaning of the equipment's interior. This solves the problem of limited cleaning range in traditional cleaning methods, improving cleaning efficiency and effectiveness.

[0086] In the sewage discharge structure 4, the rotating motor 402 drives the drive rod 403, which in turn drives the auger 404 to transport sludge and, through the crank rod 405 and connecting pull plate 406, drives the rotating scraper 410 to move. The rotating scraper 410 can be parallel or perpendicular to the sludge collection funnel 401 in different directions of movement. This design, which integrates sludge transport and anti-accumulation cleaning, is novel and unique. Furthermore, by cleverly utilizing a single rotating motor 402 to simultaneously drive the auger 404 and the rotating scraper 410, the two functions of sludge transport and anti-accumulation cleaning are organically combined, optimizing the sewage discharge process, improving sewage discharge efficiency, and reducing sludge residue inside the equipment.

[0087] Furthermore, multiple sets of rotating shafts 311 are sequentially connected via connecting rods 309 and connecting plates 310. The rotating shafts 311 have a regular hexagonal cross-section and are slidably connected to the movable sleeve 312. This connection method and structural design are rare in similar equipment, ensuring better transmission stability and oscillation synchronization. The overall solution organically combines the oscillating cleaning structure 3 and the sewage discharge structure 4. The controller 5 centrally controls the water pump 6, electromagnetic control valve 7, drive motor 301, and rotating motor 402, achieving automated operation and improving the equipment's intelligence and ease of operation.

Claims

1. A membrane bioreactor for chemical wastewater treatment, characterized in that: The device includes a connecting box (1), a membrane bioreactor (2) is installed in the inner cavity of the connecting box (1), a swing cleaning structure (3) is installed on the connecting box (1), a sewage discharge structure (4) is connected to the bottom of the connecting box (1), a controller (5) and a water pump (6) are installed on the side wall of the connecting box (1), and an electromagnetic control valve (7) is installed on the sewage discharge pipe at the bottom of the connecting box (1). The drive motor (301) of the swing cleaning structure (3) drives the swing nozzle (316) to swing and move up and down at the same time to clean the membrane of the membrane bioreactor (2). The sewage discharge structure (4) drives the auger (404) to rotate and the rotating scraper (410) to move back and forth through the rotating motor (402) to discharge the sludge generated by the device cleaning.

2. The membrane bioreactor for chemical wastewater according to claim 1, characterized in that: The swing cleaning structure (3) includes a drive motor (301), which is mounted on the end face of the connecting box (1) via a connecting seat. The drive end of the drive motor (301) is connected to the drive rod (302) via a coupling. Both ends of the drive rod (302) are connected to the driven helical gear (304) via a drive helical gear (303). A drive shaft (305) is installed at the center of the driven helical gear (304). A turntable (306) is installed on the drive shaft (305). A connecting rod (307) is connected to one side of the turntable (306), and the other end of the connecting rod (307) is connected to the swing plate (308).

3. The membrane bioreactor for chemical wastewater according to claim 2, characterized in that: The other end of the swing plate (308) is connected to the connecting rod (309), and the other end of the connecting rod (309) is connected to the connecting plate (310). Both the swing plate (308) and the connecting plate (310) are connected to a rotating shaft (311). A movable sleeve (312) is installed on the rotating shaft (311). A connecting lever (313) is symmetrically installed on the side wall of the movable sleeve (312). A fixed sleeve (314) is installed on the connecting lever (313). The fixed sliding sleeve (314) is connected to the connecting box (1). The side wall of the fixed sliding sleeve (314) is provided with a spiral groove (315) corresponding to the connecting lever (313). The bottom of the movable sliding sleeve (312) is equipped with a swing nozzle (316). The bottom of the swing nozzle (316) is connected to the connecting sleeve (317). The bottom of the connecting sleeve (317) is connected to the main waterway (318). One end of the main waterway (318) is connected to the outlet of the water pump (6) through a conduit.

4. A membrane bioreactor for chemical wastewater according to claim 2, characterized in that: The water pump (6), electromagnetic control valve (7), and drive motor (301) are all electrically connected to the controller (5) via wires; the drive rod (302) is rotatably mounted on the end face of the connecting box (1) via a bearing seat, and the drive shaft (305) is rotatably connected to the connecting box (1) via a bearing seat.

5. A membrane bioreactor for chemical wastewater according to claim 1, characterized in that: The sewage discharge structure (4) includes a sludge collection funnel (401), which is installed at the bottom of the connecting box (1). One end of the sludge collection funnel (401) is connected to a rotating motor (402) via a connecting seat. The drive end of the rotating motor (402) is connected to a drive rod (403) via a coupling. Screws (404) are symmetrically installed on the drive rod (403). Crank rods (405) are installed on the drive rod (403) and on both sides of the screws (404). A connecting pull plate (406) is symmetrically installed. The other end of the connecting pull plate (406) is connected to a connecting rotating rod (407). A movable slider (408) is installed on the connecting rotating rod (407). A fixed slide rail (409) is installed on the movable slider (408). The fixed slide rail (409) is connected to the mud collection funnel (401). A rotating scraper (410) is installed on the connecting rotating rod (407). A limit stop bar (411) is provided on the side wall of the movable slider (408) and corresponding to the rotating scraper (410).

6. A membrane bioreactor for chemical wastewater according to claim 5, characterized in that: The rotating motor (402) is electrically connected to the controller (5) via a wire; the driving rod (403) is rotatably connected to the mud collection funnel (401) via a bearing seat; the crank rod (405) is rotatably connected to the connecting pull plate (406); the connecting pull plate (406) is rotatably connected to the connecting rotating rod (407); the connecting rotating rod (407) is rotatably connected to the moving slider (408) via a bearing; and the moving slider (408) is slidably connected to the fixed slide rail (409).

7. A membrane bioreactor method for chemical wastewater, characterized in that, This is a biological reaction method for a membrane bioreactor for chemical wastewater, based on any one of claims 1 to 6, comprising the following steps: Step 1: When it is necessary to clean the membrane of the membrane bioreactor (2), the controller (5) controls the operation of the drive motor (301) and the water pump (6). The drive motor (301) drives the swing nozzle (316) to swing and move up and down through the transmission structure. The water pump (6) continuously supplies water to the swing nozzle (316) to achieve the cleaning of the membrane. Step 2: During the cleaning process, the controller (5) controls the operation of the rotating motor (402) and the electromagnetic control valve (7). The rotating motor (402) drives the auger (404) to rotate and the rotating scraper (410) to move back and forth through the transmission structure. The rotating scraper (410) scrapes the sludge on the inner wall of the sludge collection funnel (401) to the auger (404). The auger (404) transports the sludge to the middle and discharges it through the sewage pipe.

8. The method for membrane bioreactoring of chemical wastewater according to claim 7, characterized in that, The transmission process described in step 1 is as follows: the drive motor (301) drives the drive rod (302) to rotate, the drive rod (302) drives the driven helical gear (304) to rotate through the active helical gear (303), the driven helical gear (304) drives the drive shaft (305) and the turntable (306) to rotate, the turntable (306) drives the swing plate (308) to swing through the connecting rod (307), the swing plate (308) drives multiple sets of rotating shafts (311) to swing through the connecting rod (309) and the connecting plate (310), the rotating shaft (311) drives the moving sleeve (312) to swing, the connecting lever (313) on the moving sleeve (312) moves along the spiral groove (315) of the fixed sleeve (314), thereby driving the swing nozzle (316) to move up and down.

9. The method of using a membrane bioreactor for chemical wastewater treatment according to claim 7, characterized in that, The transmission process described in step 2 is as follows: the rotating motor (402) drives the driving rod (403) to rotate, and the driving rod (403) simultaneously drives the auger (404) and the crank (405) to rotate. The crank (405) drives the connecting rod (407) and the moving slider (408) to move along the fixed slide rail (409) through the connecting pull plate (406). The connecting rod (407) drives the rotating scraper (410) to move. When the rotating scraper (410) moves downward, it is parallel to the mud collection funnel (401) under the action of the limit stop bar (411). When it moves upward, it is perpendicular to the mud collection funnel (401).

10. The method of using a membrane bioreactor for chemical wastewater treatment according to claim 8, characterized in that: Multiple sets of rotating shafts (311) are connected in sequence by connecting rods (309) and connecting plates (310). The cross-section of the rotating shaft (311) is a regular hexagonal structure, and the movable sliding sleeve (312) is slidably connected to the rotating shaft (311).

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