Integrated device and process for treating electronic-grade wet chemical organic wastewater

Abstract

The application relates to the field of sewage treatment, and specifically discloses an integrated treatment device and treatment process for electronic-grade wet chemical organic wastewater, which comprises a box body, the box body comprises an adjusting pool, an anoxic pool, a membrane pool and a equipment room, a membrane rack is arranged in the membrane pool, two groups of modules are arranged in the membrane rack, each group of modules comprises a plurality of uniformly and intervally arranged membrane frames, a plurality of membrane filaments are arranged on the membrane frames, the membrane frames in the two groups of modules are alternately and intervally arranged, a water collecting pipe is arranged on the membrane pool, the water collecting pipe is connected with each group of modules, a partition plate is arranged in the middle of the water collecting pipe, the partition plate divides each group of modules into two membrane blocks, an installation plate is arranged on the membrane pool, a drainage conversion assembly and a dosing circulation assembly for switching different membrane blocks are arranged on the installation plate. The application has the effects of improving the internal cleaning efficiency of the membrane filaments and relieving the blockage problems at the two ends of the membrane filaments.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment equipment technology, and in particular to an integrated treatment device and process for electronic-grade wet chemical organic wastewater. Background Technology

[0002] Electronic-grade wet chemicals refer to ultra-high purity reagents and functional materials used in the manufacturing processes of semiconductor integrated circuits, flat panel displays, photovoltaic cells, and microelectronic devices, such as etching solutions, stripping solutions, cleaning agents, developers, and diluents. During the production, synthesis, use, and equipment cleaning processes, these chemicals inevitably introduce large amounts of organic solvents, surfactants, photoresist resins, complexing agents, and photoresists, resulting in high-concentration organic wastewater.

[0003] In existing technologies, the main process for treating organic wastewater using membrane bioreactors (MBRs) is as follows: Wastewater first passes through a screen and equalization tank to remove large suspended solids and balance water quality and quantity. It then enters anaerobic, anoxic, and aerobic biological reaction zones, where most organic pollutants are degraded through hydrolysis, acidification, denitrification, and aerobic oxidation. Finally, the mixed liquor enters the MBR membrane tank, where solid-liquid separation is achieved through the physical retention of the membrane modules. The clarified liquid is discharged via a suction pump, while activated sludge and large organic molecules are retained in the tank to maintain high biomass. Regarding the sludge layer adhering to the outer surface of the MBR membrane, existing processes typically rely on an aeration system at the bottom of the membrane tank to generate a strong air-water mixture. The shear force of the rising air bubbles and the friction and shaking between the membrane fibers peel off and wash away the sludge cake layer from the membrane surface, thereby restoring some membrane flux. For internal membrane pores and deep fouling, chemical cleaning is required. A common procedure involves injecting cleaning agents such as sodium hypochlorite, citric acid, or oxalic acid into the membrane fibers from the permeate side. This removes organic pollutants and inorganic scale through oxidation or dissolution, clearing blockages in the membrane pores. An intermittent suction mode of "eight minutes on, two minutes off" is employed, meaning that after every eight minutes of continuous operation, permeate suction is stopped for two minutes. During the period of stopped permeate flow, the aeration system continues to operate, relying on the continuous agitation of air bubbles to loosen and partially detach the uncured filter cake layer on the membrane surface, while simultaneously alleviating the transmembrane pressure differential.

[0004] Although the physical aeration and flushing methods and the "eight-day operation, two-day shutdown" intermittent operation strategy mitigated MBR membrane fouling to some extent, the fouling distribution of the membrane module was extremely uneven during wastewater treatment. Because the ends of the membrane fibers (i.e., the upper root and the area near the lower water collection head) are located in regions with complex flow patterns, aeration dead zones, and limited fiber oscillation amplitude, their scaling and fouling levels are often significantly higher than those in the middle. During internal chemical cleaning, cleaning agents are typically injected into the membrane fibers, relying on the air-water mixture generated by aeration to cause the entire membrane fiber to oscillate, promoting agent diffusion and reaction with pollutants. However, because the ends of the membrane fibers are far from the aeration source, and the oscillation amplitude at the ends is much smaller than in the middle, the cleaning agent cannot effectively reach and fully wet the severely fouled areas at both ends. This results in a cleaning effect at the ends being far less effective than in the middle, with most of the cleaning agent consumed in the easily cleanable middle area, while pollutants at the ends cannot be effectively removed. After long-term operation, this not only causes a significant decrease in the effective filtration area of ​​the membrane module and a continuous increase in transmembrane pressure, but also leads to uneven pressure distribution within the membrane fibers, causing the middle section to bear excessive filtration load and accelerating local fatigue and damage. This significantly increases operating costs and maintenance difficulty, and therefore urgently needs improvement. Summary of the Invention

[0005] To address the issue of incomplete removal of contaminants at both ends of the membrane fibers, this application provides an integrated treatment device and process for electronic-grade wet chemical organic wastewater.

[0006] The integrated treatment device for organic wastewater from electronic-grade wet chemicals provided in this application adopts the following technical solution: An integrated treatment device and process for electronic-grade wet chemical organic wastewater includes a tank, which comprises an equalization tank, an anoxic tank, a membrane tank, and an equipment room. A membrane frame is installed within the membrane tank, and two sets of modules are installed within the membrane frame. Each set of modules includes multiple uniformly spaced membrane frames with multiple membrane filaments. The membrane frames in the two sets of modules are arranged alternately. A water collection pipe is installed on the membrane tank, connecting to each set of modules. A partition is installed in the middle of the water collection pipe, dividing each set of modules into two membrane blocks. An installation plate is installed on the membrane tank, and the installation plate is equipped with a drainage conversion component and a chemical dosing circulation component for switching between different membrane blocks. The drainage conversion assembly includes a conversion column disposed on the membrane frame. The side wall of the conversion column is evenly spaced with four connecting pipes, which correspond to four membrane blocks. The end face of the conversion column is connected with a dosing pipe and a drain pipe. The drainage conversion assembly also includes an adjusting component for switching between different connecting pipes. The drug delivery circulation assembly includes a circulation column disposed on the membrane frame. Four guide tubes are evenly spaced on the side wall of the circulation column, and the four guide tubes are connected to the four membrane blocks. A return tube is connected to the end face of the circulation column. The drug delivery circulation assembly also includes a circulation component for switching different circulation tubes.

[0007] By adopting the above technical solution, the sewage passes through the equalization tank and the anoxic tank and enters the membrane tank. When the membrane fibers are not blocked, the equalization device connects the drain pipe to the four connecting pipes through the conversion column. The four connecting pipes are connected to the two sets of modules and filter the sewage in the membrane tank through the membrane fibers. The filtered sewage is collected in the conversion column through the water collection pipe and flows out through the drain pipe. At this time, the dosing pipe is not connected to the module and the circulation column is not connected to the four guide pipes.

[0008] If the membrane module becomes clogged, the regulating device can independently switch any one of the four connecting pipes to the dosing pipe, precisely delivering chemical agents to the membrane module through the dosing pipe. The agents enter the clogged membrane module through the connecting pipe, cleaning the membrane fibers online. Simultaneously, the chemical agents further enter the circulation column through the guide pipe, forming a closed loop with the return pipe, allowing the agents to circulate inside the membrane fibers. This circulating cleaning method significantly improves the cleaning effect of the chemical agents on the membrane fibers, effectively alleviating the clogging problem at both ends of the membrane fibers, thereby reducing mechanical damage to the membrane fibers and extending their service life.

[0009] When chemical reagents are added, the remaining membrane modules can operate normally. Wastewater enters the collection pipe through the membrane fibers, then enters the conversion column through the connecting pipe, and is discharged through the drain pipe. Compared with the existing technology that requires stopping operation for cleaning, this device significantly improves the continuous operation capability and overall treatment efficiency of the wastewater treatment device.

[0010] Optionally, the adjusting component includes a conversion tube rotatably disposed within the conversion column, one end of the conversion tube penetrating the conversion column, a conversion plate fixedly connected to the conversion tube, a through hole communicating with the conversion tube on the conversion plate, the conversion plate being movably fitted against the inner peripheral wall of the conversion column, and the end of the conversion tube penetrating the conversion column being connected to the dosing tube.

[0011] By adopting the above technical solution, when the membrane wire is not blocked, the conversion tube moves inside the conversion column, and the through hole on the conversion plate is misaligned with the connecting pipe on the conversion column. Wastewater filtered by the membrane wire enters the conversion column through the connecting pipe and flows out through the drain pipe. When the membrane wire is blocked, the conversion tube moves to correspond with the connecting pipe, and the through hole on the connecting pipe is connected to one of the four connecting pipes. Chemical agents are introduced through the dosing pipe, and the chemical agents enter the blocked membrane block through the conversion tube, conversion plate, and connecting pipe, thereby cleaning the membrane block. The conversion column and conversion plate can clean the blocked membrane block without stopping the machine, effectively improving the continuous operation capability and treatment efficiency of the device.

[0012] Optionally, the circulation component includes a circulation pipe rotatably disposed within the circulation column, one end of the circulation pipe penetrating the circulation column and communicating with the return medicine pipe, a circulation plate fixedly connected to the circulation pipe, a through hole communicating with the circulation pipe on the circulation plate, and the circulation plate movably fitting against the inner peripheral wall of the circulation column.

[0013] By adopting the above technical solution, when the membrane fibers are not clogged, the circulation pipe is not connected to the return pipe on the circulation column. When the drain pipe drains through the conversion column and connecting pipe, the normal drainage can be ensured because the circulation pipe is not connected to the return pipe. When the membrane fibers are clogged, chemical agents can be added through the dosing pipe. The chemical agents enter the membrane fibers through the connecting pipe and flow into the circulation column through the guide pipe. At this time, the circulation plate is connected to the corresponding guide pipe. The chemical agents flow out through the circulation plate, circulation pipe and return pipe, thereby completing the agent circulation and making the agent circulate inside the membrane fibers. This effectively improves the cleaning effect inside the membrane fibers and alleviates the problem of more serious clogging at both ends of the membrane fibers.

[0014] Optionally, the mounting plate is further provided with a driving component for driving the conversion plate and the circulation plate to rotate. The driving component includes a receiving frame fixed to the film frame, a first pulley rotatably mounted on the receiving frame, a second pulley rotatably mounted on the mounting plate, and a belt adapted to the first pulley and the second pulley on the mounting plate. A first rotating shaft is fixedly connected to the end of the conversion tube away from the dosing tube, and the first rotating shaft passes through the conversion column. A second rotating shaft is fixedly connected to the end of the circulation tube away from the return tube, and the second rotating shaft passes through the circulation column. The first rotating shaft and the second rotating shaft are slidably mounted in the second pulley. A first power component for driving the second pulley to rotate is provided on the mounting plate, and a lifting component for driving the circulation plate and the conversion plate to move up and down is provided on the mounting plate.

[0015] By adopting the above technical solution, when different membrane blocks need to be cleaned, the first power unit is activated, which drives the second pulley to rotate, and through the belt drives the first pulley to rotate. The first pulley drives the first rotating shaft and the second rotating shaft to rotate, which in turn drives the circulation plate and the conversion plate to rotate in the circulation column and the conversion column respectively, so that the through holes on the circulation plate are connected to different guide pipes, and the through holes on the conversion plate are connected to different connecting pipes. Compared with the prior art, which requires stopping the machine for cleaning, this device can clean different membrane blocks without stopping the machine, which effectively improves the processing efficiency of the device.

[0016] Optionally, the lifting component includes a second power component fixedly connected to the mounting plate, a drive plate slidably disposed on the receiving frame, the output end of the second power component fixedly connected to the drive plate, and two drive rods rotatably disposed on the drive plate, the two drive rods being rotatably disposed on the first rotating shaft and the second rotating shaft respectively.

[0017] By adopting the above technical solution, when no blockage is found in the membrane fibers, the second power component drives the drive plate to move, the drive plate drives two drive rods to move, and the drive rods drive the first rotating shaft and the second rotating shaft to move closer to each other, thereby moving the circulation plate and the conversion plate. The inner peripheral wall of the circulation column blocks the through holes on the circulation plate, and the inner peripheral wall of the conversion column blocks the through holes on the conversion plate, ensuring that the drain pipe discharges the wastewater filtered by the membrane fibers, thus improving the stability of the device.

[0018] Optionally, the equipment room is equipped with a water outlet pump connected to the drain pipe, and the equipment room is equipped with a circulation pump and a dosing tank. One end of the circulation pump is connected to the dosing tank, the other end of the circulation pump is connected to the dosing pipe, and the return pipe is connected to the dosing tank.

[0019] By adopting the above technical solution, when effluent is discharged, the effluent pump is turned on and the drain pipe discharges effluent. When it is necessary to clean the membrane module, the chemical agent is introduced from the dosing tank into the dosing pipe through the circulation pump and then into the membrane fiber. The chemical agent is then introduced into the dosing tank through the return pipe, so that the chemical agent circulates and cleans the membrane fiber. Compared with cleaning by aeration to make the membrane fiber swing, this effectively reduces the risk of damage to both ends of the membrane fiber during mechanical movement. At the same time, the flow of chemical agent effectively improves the wastewater treatment efficiency of the device and reduces the likelihood of blockage at both ends of the membrane fiber.

[0020] Optionally, the mold frame includes a U-shaped tube and a horizontal tube, with both ends of the U-shaped tube connected to the connecting tube and the guide tube respectively, one end of the horizontal tube connected to one end of the U-shaped tube, and both ends of the membrane filament connected to the bottom of the horizontal tube and the U-shaped tube respectively.

[0021] By adopting the above technical solution, when the membrane fibers filter wastewater, the wastewater enters the membrane fibers from the peripheral wall and then enters the U-shaped tube and horizontal tube through both ends of the membrane fibers, and is then discharged through both ends of the U-shaped tube. When cleaning the membrane fibers, the chemical agent enters from the end of the U-shaped tube that connects to the horizontal tube. The chemical agent enters the membrane fibers through the bottom of the horizontal tube and the U-shaped tube, and is introduced through the other end of the U-shaped tube. This reduces the situation where the chemical agent directly enters from the other end of the U-shaped tube through the horizontal tube, allowing the chemical agent to fully contact the pollutants inside the membrane fibers and improving the cleaning effect of the membrane fibers.

[0022] Optionally, one end of the mold frame is connected to a flexible tube, one end of the flexible tube is connected to the water collection pipe, a medicine collection pipe is provided on the membrane frame, a partition is also provided inside the medicine collection pipe, one end of the medicine collection pipe is connected to the U-shaped pipe, and the medicine collection pipe is connected to the guide pipe.

[0023] By adopting the above technical solution, the water collection pipe is connected to each membrane frame through a flexible hose, and the partition installed inside the chemical collection pipe makes each chemical collection pipe correspond to the membrane block in each membrane group.

[0024] Optionally, the end of the circulation pipe away from the circulation column is connected to a first telescopic pipe, and the end of the first telescopic pipe away from the circulation pipe is connected to the return pipe. The end of the switching pipe away from the switching column is connected to a second telescopic pipe, and the end of the second telescopic pipe away from the switching column is connected to the dosing pipe.

[0025] By adopting the above technical solution, when the lifting component drives the circulation plate and the conversion plate to move along the height direction, the first telescopic tube and the second telescopic tube shorten and lengthen accordingly.

[0026] An integrated treatment process for organic wastewater from electronic-grade wet chemicals includes the following steps: S1. When the membrane block is not blocked, the lifting component and the driving component drive the circulation plate and the conversion plate to move, and connect the drain pipe to the four membrane blocks through the conversion column. The circulation plate disconnects the return pipe from the four membrane blocks. The drain pump generates suction, and the membrane fibers filter the sewage, which flows out through the hose, water collection pipe, connecting pipe, conversion column and drain pipe in sequence. S2. When the membrane block becomes clogged, the lifting component and the driving component drive the circulation plate and the conversion plate to move, and connect the drain pipe to three of the membrane blocks. The membrane fibers in the three operating membrane blocks filter the sewage. The filtered sewage flows out through the hose, the water collection pipe, the three connecting pipes, the circulation column, and the drain pipe in sequence. The circulation plate corresponds to the blocked membrane block. When the circulation pump is turned on, the chemical reagent is introduced into the blocked membrane block through the dosing pipe, the first telescopic pipe, the conversion pipe, the conversion plate, and the connecting pipe. The chemical reagent is introduced from one end of the U-shaped tube and then into the membrane fiber through the horizontal tube. The chemical reagent flows out through the other end of the U-shaped tube and flows into the dosing tank in sequence through the collection tube, the guide tube, the circulation plate, the circulation tube, the second telescopic tube, and the return tube, thus completing the circulation. S3. When multiple membrane blocks become blocked at the same time, the drive unit and lifting unit drive the circulation plate and conversion plate to move and clean each membrane block in turn.

[0027] By adopting the above technical solution, the device can clean four membrane blocks without shutting down the machine, thereby improving the wastewater treatment effect. At the same time, when multiple membrane blocks become clogged, the corresponding membrane blocks can be cleaned in sequence, and the normal function of the membrane fibers is not affected when no blockage occurs.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. When membrane fibers become clogged, the lifting and driving components connect the through holes on the conversion plate to the connecting pipe, and the through holes on the circulation plate to the guide pipe. The circulation pump introduces the chemical agent into the membrane fibers through the dosing pipe, conversion pipe, conversion plate, and connecting pipe, and then returns it to the dosing tank through the collection pipe, guide pipe, circulation pipe, and return pipe. This allows the chemical agent to circulate inside the membrane fibers. Compared with the traditional aeration and shaking mixing method, this effectively reduces mechanical damage to the membrane fibers, enhances the cleaning effect of the chemical agent on pollutants inside the membrane fibers, reduces the accumulation of pollutants at both ends of the membrane fibers, and thus alleviates the membrane fiber clogging problem. 2. When overhauling the device, the overhaul can be completed by checking the wear between the circulation plate and the circulation column, and between the switching plate and the switching column. Compared with adding chemicals and draining water to the membrane through multiple pipes and solenoid valves, this effectively reduces the difficulty of maintenance. In addition, since electronic-grade wet chemical organic wastewater is prone to generating corrosive gases during treatment, and the internal circuit of the solenoid valve is easily affected, switching through the circulation plate and the switching plate effectively improves the stability of the device.

[0029] 3. The monitoring equipment installed in the dosing tank can monitor the changes in the concentration of the agent in real time and can immediately judge the cleaning status. Compared with the existing technology, which requires a long time to wait for the agent to clean the impurities in the membrane fibers, it effectively reduces the risk of insufficient or excessive cleaning, simplifies the operation steps, shortens the judgment cycle, and improves the operating efficiency. 4. By dividing the membrane into four sections and through the combined action of the switching column, circulation column, switching pipe, and circulation pipe, the device can clean different membrane sections without shutting down the machine. Compared with the existing technology that requires shutdown for cleaning, this effectively improves the continuity and overall efficiency of wastewater treatment. 5. During the cleaning process of different modules, chemical agents are added to the blocked modules through the circulation column and circulation pipe, and the treated wastewater is discharged through the remaining circulation pipe and drainage pipe. Compared with the direct use of multiple pipes and valves for control, this effectively saves manufacturing costs, reduces the size of the device, and reduces maintenance difficulty. At the same time, the circulation pipe undertakes the functions of drainage and chemical addition. When adding chemical agents, it is equivalent to cleaning the circulation pipe, which effectively reduces the risk of blockage in the circulation pipe and further reduces maintenance difficulty. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a cross-sectional structural diagram of an embodiment of this application; Figure 3 This is a partial structural schematic diagram of the drainage conversion component and the chemical dosing circulation component, as shown in the embodiments of this application. Figure 4 This is a schematic diagram illustrating a portion of the module's structure, as shown in the embodiments of this application. Figure 5 This is a partial structural schematic diagram of the driving component and the lifting component used in the embodiments of this application; Figure 6 This is a partial structural schematic diagram of the circulation column and the conversion column used in the embodiments of this application; Figure 7 This is a schematic diagram illustrating a portion of the structure of the water collection pipe in an embodiment of this application; Figure 8 This is a schematic diagram illustrating a portion of the membrane frame structure in an embodiment of this application.

[0031] Attached reference numerals: 1. Tank; 11. Equalization tank; 12. Anoxic tank; 13. Membrane tank; 14. Equipment room; 141. Effluent pump; 142. Circulation pump; 143. Dosing tank; 2. Membrane frame; 21. Membrane module; 22. Baffle plate; 23. Membrane frame; 231. U-shaped tube; 232. Horizontal tube; 24. Membrane fiber; 31. Mounting plate; 32. Support frame; 33. Water collection pipe; 34. Flexible hose; 35. Chemical collection pipe; 4. Drainage conversion assembly; 41. Conversion column; 42. Connecting pipe; 43. Dosing pipe; 44. First telescopic pipe; 45. Adjusting component; 451. Conversion pipe; 452. Conversion plate; 46. Drainage pipe; 5. Dosing circulation assembly; 51. Circulation column; 52. Guide tube; 53. Return tube; 54. Second telescopic tube; 55. Circulation component; 551. Circulation pipe; 552. Circulation plate; 6. Driving component; 61. First power component; 62. First pulley; 63. Second pulley; 64. Belt; 65. First rotating shaft; 66. Second rotating shaft; 7. Lifting component; 71. Second power component; 72. Drive plate; 73. Drive rod. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0033] The application discloses an integrated treatment device for organic wastewater from electronic-grade wet chemicals. (See also...) Figures 1-4 and Figures 7-8 The integrated treatment device for organic wastewater from electronic-grade wet chemicals includes a housing 1, which comprises an equalization tank 11, an anoxic tank 12, a membrane tank 13, and an equipment room 14. Both the equalization tank 11 and the anoxic tank 12 are equipped with lift pumps to circulate the wastewater. A membrane frame 2 is installed in the membrane tank 13, and two sets of membrane modules 21 are mounted on the membrane frame 2. Each membrane module 21 includes multiple spaced membrane frames 23, with multiple membrane filaments 24 evenly connected to each membrane frame 23. The membrane frames 23 of the two sets of membrane modules 21 are arranged in a crisscross pattern. Two water collection pipes 33 and two chemical collection pipes 35 are fixedly connected to the membrane frame 2. Each of the water collection pipes 33 and the chemical collection pipes 35 has a separator fixedly connected inside. The membrane frame 23 includes a U-shaped tube 231 and a horizontal tube 232. One end of the horizontal tube 232 is connected to the U-shaped tube 231. The two ends of the membrane filament 24 are connected to the bottom of the U-shaped tube 231 and the horizontal tube 232, respectively. One end of the U-shaped tube 231 is connected to the drug collection tube 35. Multiple hoses 34 are connected to the water collection tube 33. The multiple hoses 34 correspond to multiple membrane frames 23. The other end of the U-shaped tube 231 is connected to the water collection tube 33 through the hoses 34. The water collection tube 33 is close to the end of the horizontal tube 232 connected to the U-shaped tube 231. The partition plate 22 divides each group of membrane modules 21 into two membrane blocks. Therefore, four groups of membrane blocks are provided on the membrane frame 23.

[0034] The equipment room 14 is equipped with a dosing tank 143, a circulation pump 142 and an outlet pump 141. One end of the circulation pump 142 is connected to the dosing tank 143, and the other end of the circulation pump 142 is connected to the water collection pipe 33. The chemical collection pipe 35 is connected to the dosing tank 143. One end of the outlet pump 141 is connected to a drain pipe 46, which is connected to the water collection pipe 33. The equipment room 14 is equipped with a controller, which may be a programmable logic controller or the like. An installation plate 31 is fixed to the top wall of the membrane tank 13. The installation plate 31 is equipped with a drainage conversion component 4 for switching different membrane blocks and a dosing circulation component 5.

[0035] When the membrane fibers 24 in the four membrane blocks are not blocked, the drainage conversion component 4 connects the drain pipe 46 to the water collection pipe 33 and keeps the dosing tank 143 and the water collection pipe 33 disconnected. The dosing circulation component 5 keeps the dosing pipe 35 and the dosing tank 143 disconnected as well. The effluent pump 141 is started, and the membrane fibers 24 filter the sewage in the membrane tank 13. The treated sewage is introduced into the water collection pipe 33 through the U-shaped pipe 231, the horizontal pipe 232 and the flexible hose 34, and then discharged through the drain pipe 46.

[0036] When the membrane fibers 24 in the four membrane blocks become clogged, the drainage conversion assembly 4 connects the drainage pipe 46 to three membrane blocks, allowing the membrane fibers 24 in the three membrane blocks to operate normally. The dosing tank 143 injects chemicals into the clogged membrane blocks through the water collection pipe 33. The chemicals are introduced into the membrane fibers 24 through one end of the U-shaped pipe 231 and the horizontal pipe 232, and then into the dosing pipe 35 through the other end of the U-shaped pipe 231. The U-shaped pipe 231 and the horizontal pipe 232 reduce the risk of the chemicals circulating through different membrane fibers 24 via the horizontal pipe 232. The chemicals are then introduced into the dosing tank 143 through the dosing pipe 35, allowing the chemicals in the membrane fibers 24 to circulate. A dosing tank can be installed in the equipment room 14 to continuously add chemicals. If multiple membrane blocks become clogged, different membrane blocks can be treated sequentially. The system can be cleaned, and a monitoring device for monitoring the content of chemical agents can be installed in the dosing tank 143. The monitoring device can be an integrated monitoring device of pH meter and total chlorine analyzer to monitor the effective chlorine content and pH value in the chemical agents. By monitoring the changes in the concentration of chemical agents, the cleaning effect of pollutants in the membrane fiber 24 can be judged. The online and real-time assessment of the cleaning status of the membrane fiber 24 does not require interruption of the cleaning process to test the effluent water quality. This allows technicians to accurately control the cleaning endpoint based on the monitored changes in agent concentration, avoiding insufficient or excessive cleaning. Compared with the existing technology, which requires starting the drain pump to discharge water again and judging the cleaning status of the membrane fiber 24 by detecting the effluent, this simplifies the operation steps, shortens the judgment cycle, and further improves the operating efficiency and automation level of the entire treatment device. Compared to the existing technology that cleans the membrane fibers 24 by shutting down the machine, this device cleans the membrane fibers 24 without shutting down the machine, which effectively improves the wastewater treatment efficiency. At the same time, it allows the chemical agents inside the membrane fibers 24 to circulate. Compared to the existing technology that uses aeration to make the membrane fibers 24 shake and thus mix the chemical agents evenly, this effectively reduces the mechanical damage to the membrane fibers 24. In addition, by enhancing the flow of the agents, it reduces the risk of severe blockage at both ends of the membrane fibers 24.

[0037] Reference Figures 3-6The drainage conversion assembly 4 includes a conversion column 41 mounted on the mounting plate 31. Four connecting pipes 42 are evenly spaced along the outer periphery of the conversion column 41. Each of the four connecting pipes 42 is connected to two water collection pipes 33, and each water collection pipe 33 is connected to two connecting pipes 42. The two connecting pipes 42 are located on opposite sides of the partition plate 22. A dosing pipe 43 is connected to the conversion column 41. The end of the drainage pipe 46 furthest from the outlet pump 141 is connected to the conversion column 41. The dosing pipe 43 is connected to a first telescopic pipe 44, which can be a stainless steel corrugated pipe, a plastic corrugated pipe, etc. The drainage conversion assembly 4 also includes a system for... An adjusting component 45 is switched to connect with four connecting pipes 42. The adjusting component 45 includes a switching pipe 451 that is rotatably and vertically installed in the switching column 41. A switching plate 452 is fixedly connected to the upper part of the switching pipe 451. A through hole is opened on the switching plate 452 that is connected to the switching pipe 451. The end of the switching pipe 451 away from the switching plate 452 is connected to the end of the first telescopic pipe 44 away from the dosing pipe 43. The switching plate 452 is fan-shaped. The outer peripheral wall of the switching plate 452 is movably fitted with the inner peripheral wall of the switching column 41. A sealing ring is provided at the connection between the switching pipe 451 and the switching column 41 to reduce the risk of sewage overflowing from the connection.

[0038] When the membrane filament 24 is not blocked, the conversion plate 452 moves upward along the height direction, causing the through hole on the conversion plate 452 to be misaligned with the connecting pipe 42. The inner peripheral wall of the conversion column 41 blocks the through hole. When draining, the sewage treated by the membrane filament 24 is introduced into the conversion column 41 through the water collection pipe 33, and then discharged out of the device through the drain pipe 46. When the membrane filament 24 is not blocked, the position of the conversion plate 452 is the initial position. The initial position of the conversion plate 452 should not block the drain pipe 46.

[0039] When membrane fibers 24 become blocked, the through holes on the conversion plate 452 are aligned with the connecting pipe 42. The conversion plate 452 is rotated so that it aligns with and connects to one of the four connecting pipes 42. The circulation pump 142 is then started. The circulation pump 142 sequentially guides the chemical reagents in the dosing tank 143 through the dosing pipe 43, the first telescopic pipe 44, the conversion pipe 451, the conversion plate 452, the connecting pipe 42, the water collection pipe 33, and the hose 34 into the membrane fibers 24, thereby cleaning the contaminants inside the membrane fibers 24. When multiple membrane fibers 24 become blocked, the conversion plate 452 can be rotated to connect it with different connecting pipes 42, thereby cleaning different membrane blocks.

[0040] Reference Figure 5 and Figure 6The dosing circulation assembly 5 includes a circulation column 51 mounted on a mounting plate 31. Four guide tubes 52 are evenly spaced on the outer peripheral wall of the circulation column 51, each corresponding to one of four membrane blocks. The four guide tubes 52 are connected to a drug collection tube 35, with two guide tubes 52 connected to each drug collection tube 35. The two guide tubes 52 are located on opposite sides of a partition plate 22. The dosing circulation assembly 5 also includes a circulation component 55 for switching between different guide tubes 52. The circulation component 55 includes a circulation tube 551 that rotates and moves up and down on the circulation column 51, with one end of the circulation tube 551 penetrating through the circulation column 51. At the end face, the circulation pipe 551 passes through the circulation column 51 and is connected to the second telescopic pipe 54. The material of the second telescopic pipe 54 is the same as that of the first telescopic pipe 44. The end of the second telescopic pipe 54 away from the circulation pipe 551 is connected to the return pipe 53. The end of the circulation pipe 551 away from the second telescopic pipe 54 is fixedly connected to the circulation plate 552. The circulation plate 552 has a through hole that communicates with the circulation pipe 551. The outer peripheral wall of the circulation plate 552 is movably fitted with the inner peripheral wall of the circulation column 51. A sealing ring is also provided at the connection between the circulation pipe 551 and the circulation column 51. The sealing ring can be a magnetic fluid sealing ring, a sealing stack ring, etc.

[0041] When the membrane filament 24 is not blocked, the circulation plate 552 descends along the height direction, causing the through hole on the circulation plate 552 to be misaligned with the guide pipe 52. The inner peripheral wall of the circulation column 51 blocks the through hole, reducing the problem of the drain pipe 46 discharging the chemical agent in the dosing tank 143 through the membrane filament 24 and the circulation pipe 551 during the drainage process.

[0042] When the membrane fiber 24 becomes clogged, the circulation plate 552 rises in the height direction, connecting the through hole on the circulation plate 552 with the guide pipe 52. The reagent in the membrane fiber 24 is introduced into the collection pipe 35 through the U-shaped pipe 231, and then enters the circulation plate 552 and circulation pipe 551 through the guide pipe 52. It then passes through the second telescopic pipe 54 and the return pipe 53 in sequence into the dosing tank 143. The dosing tank 143 can be connected to the outlet pipe to discharge the reacted chemical reagent and wastewater. By circulating the chemical reagent in the membrane fiber 24, the cleaning effect of the membrane fiber 24 is effectively improved, and the serious clogging at both ends of the membrane fiber 24 is reduced.

[0043] If multiple pipes and solenoid valves are used to drain water and add chemicals to the mold frame 23, a large number of pipes and solenoid valves are required, which increases manufacturing costs and increases the size of the device. Furthermore, since electronic-grade wet chemical organic wastewater is prone to producing corrosive gases during treatment, it is easy to damage the internal circuit of the solenoid valve during long-term treatment, resulting in poor stability when controlled by the solenoid valve.

[0044] If multiple pipes and solenoid valves are used for control, the dosing pipe and drainage pipe connected to the membrane frame 23 both need to be controlled by solenoid valves. Since a module 21 is composed of multiple membrane frames 23, if the solenoid valves malfunction during operation, each solenoid valve needs to be checked one by one, which makes maintenance difficult.

[0045] Therefore, this application uses a drainage switching component 4 to switch between different modules. If the module 21 needs to be divided into more modules, multiple connecting pipes 42 and guide pipes 52 can be connected to the corresponding conversion column 41 and circulation column 51, which increases the expandability of the device. When a fault occurs, it is only necessary to check the wear between the conversion column 41 and the conversion plate 452, and between the circulation column 51 and the circulation plate 552, which effectively reduces the difficulty of maintenance. Moreover, the device reduces the manufacturing cost while meeting the requirement of cleaning the membrane filaments 24 without stopping the machine. Furthermore, since the connecting pipe 42 plays the role of drainage and chemical agent injection, the risk of blockage of the connecting pipe 42 during use is effectively reduced.

[0046] Reference Figures 3-5 The membrane frame 2 is provided with a receiving frame 32. The mounting plate 31 is provided with a driving component 6 for driving the rotation of the circulation plate 552 and the conversion plate 452. The driving component 6 includes a first pulley 62 rotatably mounted on the receiving frame 32, a second pulley 63 rotatably mounted on the mounting plate 31, and a first power component 61 mounted on the mounting plate 31. The first power component 61 can be a servo motor, stepper motor, etc. The first power component 61 is electrically connected to the controller. The output end of the first power component 61 is coaxially fixed to the second pulley 63. The receiving frame 32 is provided with a belt 64 adapted to the first pulley 62 and the second pulley 63. The conversion tube 451 is away from... One end of the dosing tube 43 is fixedly connected to a first rotating shaft 65, which passes through the conversion column 41. The first rotating shaft 65 is slidably mounted on the first pulley 62, and a locking block is fixedly connected to the first rotating shaft 65. The first pulley 62 has a locking hole that matches the first rotating shaft 65 and the locking block. One end of the circulation tube 551 away from the return tube 53 is fixedly connected to a second rotating shaft 66, which passes through the circulation column 51. A locking block is also fixedly connected to the second rotating shaft 66, and the second rotating shaft 66 is slidably mounted on the first pulley 62. The mounting plate 31 is provided with a lifting component 7 that drives the circulation plate 552 and the conversion plate 452 to rise and fall.

[0047] When different membrane blocks need to be cleaned, the controller activates the first power unit 61, which drives the second pulley 63 to rotate. The second pulley 63 drives the first pulley 62 to rotate via the belt 64. The first pulley 62 drives the first rotating shaft 65 and the second rotating shaft 66 to rotate simultaneously, thereby driving the circulation plate 552 and the conversion plate 452 to rotate. This connects the circulation plate 552 to the guide pipe 52 corresponding to the blocked membrane block, and the conversion plate 452 to the connecting pipe 42 corresponding to the blocked membrane block.

[0048] Reference Figure 5 The lifting component 7 includes two second power components 71 fixedly connected to the mounting plate 31. The second power components 71 can be electric telescopic rods, cylinders, etc. The second power components 71 are electrically connected to the controller. A drive plate 72 is slidably arranged on the receiving frame 32. The output end of the second power components 71 is fixedly connected to the drive plate 72. Two drive rods 73 are symmetrically and rotatably arranged on the drive plate 72. The ends of the two drive rods 73 away from the drive plate 72 are respectively rotatably arranged on the first rotating shaft 65 and the second rotating shaft 66. Sealing rings are provided at the connection points of the first rotating shaft 65 and the second rotating shaft 66 with the conversion column 41 and the circulation column 51, respectively.

[0049] When it is necessary to switch between the cleaning state and the simultaneous operation of the four membrane blocks, the controller activates the second power unit 71. The second power unit 71 drives the drive plate 72 to slide on the receiving frame 32. The drive plate 72 drives the two drive rods 73 to move. The drive rods 73 drive the first rotating shaft 65 and the second rotating shaft 66 to move away from or closer to each other, thereby switching the connection state and the closed state of the conversion tube 451 and the circulation tube 551.

[0050] The implementation principle of the integrated treatment device and treatment process for electronic-grade wet chemical organic wastewater in this application embodiment is as follows: When the membrane fiber 24 is not blocked, the second power component 71 is started. The second power component 71 drives the first rotating shaft 65 and the second rotating shaft 66 to move through the drive plate 72 and the drive rod 73, and keeps the rotating pipe and the circulation pipe 551 in a closed state. The drainage pump is started, the membrane fiber 24 filters the sewage, and the filtered sewage is discharged through the water collection pipe 33, four connecting pipes 42, conversion column 41 and drainage pipe 46 in sequence.

[0051] When the membrane fiber 24 becomes clogged, the second power unit 71 is activated, and the rotating tube is connected to one of the four connecting tubes 42. The circulation tube 551 is aligned with the corresponding guide tube 52. The circulation pump 142 is activated, and the circulation pump 142 sequentially pumps the chemical agent through the dosing tube 43, the first telescopic tube 44, the conversion tube 451, the conversion plate 452, and the connecting tube 42 into the membrane fiber 24. The chemical agent in the membrane fiber 24 then sequentially passes through the collecting tube 35, the guide tube 52, the circulation plate 552, the circulation tube 551, the second telescopic tube 54, and the return tube 53 into the dosing tank 143, thereby circulating the chemical agent in the membrane fiber 24. When different membrane blocks need to be processed, the first power unit 61 is activated. The first power unit 61 drives the circulation plate 552 and the conversion plate 452 to rotate via the first pulley 62, the second pulley 63, and the belt 64, so that they correspond to the membrane blocks that are blocked, thereby cleaning different membrane blocks. Compared with the prior art, which requires stopping the machine to clean the membrane fibers 24, this device effectively solves the problem of severe blockage at both ends of the membrane fibers 24 by circulating the chemical agents inside the membrane fibers 24, improving the cleaning efficiency of the membrane fibers 24. At the same time, different membrane blocks can be cleaned without stopping the machine, which effectively improves the wastewater treatment efficiency of the device.

[0052] This embodiment also discloses an integrated treatment process for organic wastewater from electronic-grade wet chemicals, providing an integrated treatment device for organic wastewater from electronic-grade wet chemicals, including the following steps: S1. When the membrane blocks are not clogged, the lifting component 7 and the driving component 6 drive the circulation plate 552 and the conversion plate 452 to move, and connect the drain pipe 46 to the four membrane blocks through the conversion column 41. The circulation plate 552 disconnects the return pipe 53 from the four membrane blocks. The drain pump generates suction, and the membrane fiber 24 filters the sewage, which flows out sequentially through the hose 34, the water collection pipe 33, the connecting pipe 42, the conversion column 41, and the drain pipe 46. S2. When the membrane block becomes clogged, the lifting component 7 and the driving component 6 drive the circulation plate 552 and the conversion plate 452 to move, and make the drain pipe 46 connect with three of the membrane blocks. The membrane fibers 24 in the three operating membrane blocks filter the sewage. The filtered sewage flows out through the hose 34, the water collection pipe 33, the three connecting pipes 42, the circulation column 51, and the drain pipe 46 in sequence. The circulation plate 552 corresponds to the blocked membrane block, the circulation pump 142 is turned on, and the chemical agent is introduced into the blocked membrane block through the dosing pipe 43, the first telescopic pipe 44, the conversion pipe 451, the conversion plate 452, and the connecting pipe 42; The chemical agent is introduced from one end of the U-shaped tube 231 and then introduced into the membrane fiber 24 through the horizontal tube 232. The chemical agent flows out through the other end of the U-shaped tube 231 and flows into the dosing tank 143 in sequence through the collection tube 35, the guide tube 52, the circulation plate 552, the circulation tube 551, the second telescopic tube 54, and the return tube 53, thus completing the circulation. S3. When multiple membrane blocks become blocked at the same time, the drive unit 6 and the lifting unit 7 drive the circulation plate 552 and the conversion plate 452 to move and clean each membrane block in turn.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An integrated treatment device for organic wastewater from electronic-grade wet chemicals, comprising a housing (1), wherein the housing (1) includes an equalization tank (11), an anoxic tank (12), a membrane tank (13), and an equipment room (14), characterized in that: The membrane tank (13) is provided with a membrane frame (2), and the membrane frame (2) is provided with two sets of membrane groups (21). Each set of membrane groups (21) includes multiple uniformly spaced frame modules. Multiple membrane filaments (24) are provided on the membrane frame (23). The membrane frames (23) in the two sets of membrane groups (21) are arranged alternately. The membrane tank (13) is provided with a water collection pipe (33), which is connected to each set of membrane groups (21). A partition (22) is provided in the middle of the water collection pipe (33), which divides each set of membrane groups (21) into two membrane blocks. The membrane tank (13) is provided with an installation plate (31), which is provided with a drainage conversion component (4) and a chemical dosing circulation component (5) for switching between different membrane blocks. The drainage conversion assembly (4) includes a conversion column (41) disposed on the membrane frame (2). The side wall of the conversion column (41) is evenly spaced with four connecting pipes (42). The four connecting pipes (42) correspond to the four membrane blocks. The end face of the conversion column (41) is connected with a dosing pipe (43) and a drain pipe (46). The drainage conversion assembly (4) also includes an adjusting member (45) for switching different connecting pipes (42). The drug delivery circulation assembly (5) includes a circulation column (51) disposed on the membrane frame (2). The side wall of the circulation column (51) is evenly spaced and connected to four guide tubes (52). The four guide tubes (52) are connected to four membrane blocks. The end face of the circulation column (51) is connected to a return tube (53). The drug delivery circulation assembly (5) also includes a circulation component (55) for switching different circulation tubes (551).

2. The integrated treatment device for electronic-grade wet chemical organic wastewater according to claim 1, characterized in that: The adjusting component (45) includes a conversion tube (451) rotatably disposed inside the conversion column (41). One end of the conversion tube (451) passes through the conversion column (41). A conversion plate (452) is fixedly connected to the conversion tube (451). A through hole communicating with the conversion tube (451) is opened on the conversion plate (452). The conversion plate (452) is movably fitted with the inner peripheral wall of the conversion column (41). One end of the conversion tube (451) passing through the conversion column (41) is connected to the dosing tube (43).

3. The integrated treatment device for electronic-grade wet chemical organic wastewater according to claim 1, characterized in that: The circulation component (55) includes a circulation pipe (551) rotatably disposed within the circulation column (51). One end of the circulation pipe (551) passes through the circulation column (51) and is connected to the return pipe (53). A circulation plate (552) is fixedly connected to the circulation pipe (551). A through hole communicating with the circulation pipe (551) is provided on the circulation plate (552). The circulation plate (552) is movably fitted to the inner peripheral wall of the circulation column (51).

4. The integrated treatment device for electronic-grade wet chemical organic wastewater according to claim 3, characterized in that: The mounting plate (31) is also provided with a driving component (6) for driving the conversion plate (452) and the circulation plate (552) to rotate. The driving component (6) includes a receiving frame (32) fixed to the membrane frame (2). A first pulley (62) is rotatably mounted on the receiving frame (32). A second pulley (63) is rotatably mounted on the mounting plate (31). A belt (64) adapted to the first pulley (62) and the second pulley (63) is provided on the mounting plate (31). A first rotating shaft (65) is fixedly connected to one end of the conversion tube (451) away from the dosing tube (43). The first rotating shaft (65) passes through the conversion column (41), and the end of the circulation pipe (551) away from the return pipe (53) is fixedly connected to the second rotating shaft (66). The second rotating shaft (66) passes through the circulation column (51). The first rotating shaft (65) and the second rotating shaft (66) are slidably arranged in the second pulley (63). The mounting plate (31) is provided with a first power component (61) that drives the second pulley (63) to rotate. The mounting plate (31) is provided with a lifting component (7) that drives the circulation plate (552) and the conversion plate (452) to move up and down.

5. The integrated treatment device for electronic-grade wet chemical organic wastewater according to claim 4, characterized in that: The lifting component (7) includes a second power component (71) fixedly connected to the mounting plate (31). A drive plate (72) is slidably arranged on the receiving frame (32). The output end of the second power component (71) is fixedly connected to the drive plate (72). Two drive rods (73) are rotatably arranged on the drive plate (72). The two drive rods (73) are respectively rotatably arranged on the first rotating shaft (65) and the second rotating shaft (66).

6. The integrated treatment device for electronic-grade wet chemical organic wastewater according to claim 1, characterized in that: The equipment room (14) is equipped with a water pump (141), which is connected to the drain pipe (46). The equipment room (14) is also equipped with a circulation pump (142) and a dosing tank (143). One end of the circulation pump (142) is connected to the dosing tank (143), and the other end of the circulation pump (142) is connected to the dosing pipe (43). The return pipe (53) is connected to the dosing tank (143).

7. The integrated treatment device for electronic-grade wet chemical organic wastewater according to claim 1, characterized in that: The frame includes a U-shaped tube (231) and a horizontal tube (232). The two ends of the U-shaped tube (231) are connected to the connecting tube (42) and the guide tube (52) respectively. One end of the horizontal tube (232) is connected to one end of the U-shaped tube (231). The two ends of the membrane filament (24) are connected to the bottom of the horizontal tube (232) and the U-shaped tube (231) respectively.

8. The integrated treatment device for electronic-grade wet chemical organic wastewater according to claim 7, characterized in that: One end of the mold frame is connected to a flexible tube (34), one end of the flexible tube (34) is connected to the water collection pipe (33), a medicine collection pipe (35) is provided on the membrane frame (2), a partition (22) is also provided inside the medicine collection pipe (35), one end of the medicine collection pipe (35) is connected to the U-shaped pipe (231), and the medicine collection pipe (35) is connected to the guide pipe (52).

9. The integrated treatment device for electronic-grade wet chemical organic wastewater according to claim 3, characterized in that: The end of the circulation pipe (551) away from the circulation column (51) is connected to a first telescopic pipe (44), and the end of the first telescopic pipe (44) away from the circulation pipe (551) is connected to the return pipe (53). The end of the conversion pipe (451) away from the conversion column (41) is connected to a second telescopic pipe (54), and the end of the second telescopic pipe (54) away from the conversion column (41) is connected to the dosing pipe (43).

10. The integrated treatment process for electronic-grade wet chemical organic wastewater according to claim 1, applicable to the integrated treatment process for electronic-grade wet chemical organic wastewater according to any one of claims 1-9, characterized in that: Includes the following steps: S1. When the membrane block is not blocked, the lifting component (7) and the driving component (6) drive the circulation plate (552) and the conversion plate (452) to move, and connect the drain pipe (46) to the four membrane blocks through the conversion column (41). The circulation plate (552) disconnects the return pipe (53) from the four membrane blocks. The drain pump generates suction, and the membrane fiber (24) filters the sewage and flows out through the hose (34), the water collection pipe (33), the connecting pipe (42), the conversion column (41), and the drain pipe (46) in sequence. S2. When the membrane block becomes clogged, the lifting component (7) and the driving component (6) drive the circulation plate (552) and the conversion plate (452) to move, and make the drain pipe (46) connect with three of the membrane blocks. The membrane fibers (24) in the three running membrane blocks filter the sewage. The filtered sewage flows out through the hose (34), the water collection pipe (33), the three connecting pipes (42), the circulation column (51), and the drain pipe (46) in sequence. The circulation plate (552) corresponds to the blocked membrane block, the circulation pump (142) is turned on, and the chemical agent is introduced into the blocked membrane block through the dosing pipe (43), the first telescopic pipe (44), the conversion pipe (451), the conversion plate (452), and the connecting pipe (42); The chemical agent is introduced from one end of the U-shaped tube (231) and then introduced into the membrane fiber (24) through the horizontal tube (232). The chemical agent flows out through the other end of the U-shaped tube (231) and flows into the dosing tank (143) in sequence through the collection tube (35), the guide tube (52), the circulation plate (552), the circulation tube (551), the second telescopic tube (54), and the return tube (53), thus completing the circulation. S3. When multiple membrane blocks become blocked at the same time, the drive unit (6) and the lifting unit (7) drive the circulation plate (552) and the conversion plate (452) to move and clean each membrane block in turn.

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