Environment-friendly wastewater treatment system for bio-based fatty acid ester manufacturing

Abstract

The invention discloses an environment-friendly wastewater treatment system for bio-based fatty acid ester manufacturing, and relates to the technical field of wastewater treatment.The environment-friendly wastewater treatment system comprises a treatment tank, a filtering mechanism, a pollution discharge mechanism and a rotational flow mechanism are arranged in the treatment tank, and a main driving pipe is rotationally arranged in the treatment tank; the filtering mechanism comprises a first filtering disc fixedly connected to the inner wall of the treatment tank, and second filtering discs are symmetrically arranged on the upper surface and the lower surface of the first filtering disc. The filtering mechanism has the flexible distance adjusting capacity, the distance between the upper second filtering disc and the lower second filtering disc and the first filtering disc in the middle is flexibly adjusted through the interaction of the electromagnetic blocks and the permanent magnet discs, the adaptability of the system is enhanced through the design, the adjusting process of the distance between the filtering discs is greatly simplified, and the filtering efficiency is improved. The operation efficiency is improved, impurities are convenient to clean, and due to the design of the variable-distance filtering mechanism, the impurities between the filtering discs are more convenient to clean.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, in particular to an environmentally friendly wastewater treatment system manufactured by bio-based fatty acid esters. Background Art

[0002] Bio-based fatty acid esters, as environmentally friendly materials, have widespread applications in various fields. However, the wastewater generated during their production contains high concentrations of organic matter and suspended particles, which can cause serious environmental pollution if discharged directly. Therefore, the development of efficient and cost-effective wastewater treatment technologies is crucial for the sustainable development of the bio-based fatty acid ester industry.

[0003] Traditional wastewater treatment methods, such as sedimentation, filtration, and biological treatment, have numerous shortcomings when treating bio-based fatty acid ester wastewater. These methods often suffer from low treatment efficiency, difficulty meeting emission standards, and high operating costs. While existing wastewater treatment systems can effectively remove some organic matter, they are less effective at removing suspended particles. Furthermore, biological filters are susceptible to fluctuations in water quality, resulting in poor operational stability.

[0004] In addition, traditional wastewater treatment systems have a low degree of automation, rely on manual adjustment of filtration parameters, and have a slow response speed; the existing electromagnetic control module lacks an accurate feedback mechanism and cannot achieve real-time dynamic adjustment of the spacing between filter discs; the coordinated control of the cyclone mechanism and the filtration mechanism is insufficient, resulting in high energy consumption and unstable treatment efficiency.

[0005] To overcome the shortcomings of the prior art, the present invention proposes an environmentally friendly wastewater treatment system made from bio-based fatty acid esters, which can effectively remove large particles of impurities in wastewater and reduce the burden on subsequent filtration mechanisms. Summary of the Invention

[0006] The environmentally friendly wastewater treatment system manufactured from bio-based fatty acid esters provided by the present invention realizes flexible adjustment of the filter disc spacing and convenient impurity cleaning through an innovative variable-distance filter mechanism design, effectively improving the efficiency of wastewater treatment and the operational stability of the system, and has significant beneficial effects.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: an environmentally friendly wastewater treatment system for bio-based fatty acid ester production, comprising a treatment tank, wherein a filtering mechanism, a sewage discharge mechanism, and a cyclone mechanism are provided inside the treatment tank, and a main drive pipe is rotatably provided inside the treatment tank; The filtering mechanism includes a first filter plate fixedly connected to the inner wall of the processing tank, and a second filter plate is symmetrically provided on the upper and lower surfaces of the first filter plate, and a plurality of pairs of fixed plates corresponding to the upper and lower positions are fixedly provided on the inner wall of the processing tank, and a limiting slide rod is fixedly connected between each pair of fixed plates, and the surfaces of the two second filter plates are provided with sliding through holes matching the limiting slide rod, and the second filter plates are slidingly connected to the surface of the limiting slide rod through the sliding through holes, and the surfaces of the two second filter plates away from each other are fixed with a lifting rod, and the sides of the two fixed plates away from each other are fixed with a protective circular shell, and the inner wall of the protective circular shell is fixed with an electromagnetic block, and the end of the lifting rod is fixed with a permanent magnetic disk, and the position of the permanent magnetic disk corresponds to the electromagnetic block.

[0008] Preferably, the swirl mechanism includes a limiting mounting ring fixedly connected to the surface of the main driving tube, a plurality of movable shafts are rotatably provided on the lower surface of the limiting mounting ring, the bottom end of the movable shaft is fixedly connected to a swirl blade, the upper surface of the limiting mounting ring is fixedly connected to an annular fixed shell, the position of the annular fixed shell corresponds to the movable shaft, the upper surface of the limiting mounting ring is rotatably connected to a linkage gear ring, and an adjusting motor is fixedly provided inside the limiting mounting ring, the rotating shaft of the adjusting motor is fixedly connected to a driving gear, and the top end of the movable shaft extends to the inside of the annular fixed shell and is fixedly connected to a transmission gear.

[0009] Preferably, several movable shafts are evenly distributed in a circular array on the surface of the limit mounting ring, and several transmission gears are surrounded by the surface of the linkage gear ring, and several transmission gears are engaged with the linkage gear ring, the driving gear is engaged with the linkage gear ring, and several of the swirl blades are distributed in a spiral radial pattern around the main drive tube.

[0010] Preferably, a return spring is sleeved on the surface of the limiting slide rod, one end of the return spring is fixedly connected to the surface of the second filter disc, and the other end of the return spring is fixedly connected to the surface of the fixed plate, and the surfaces of the first filter disc and the second filter disc are both provided with a plurality of filter holes, and the apertures of the filter holes on the surfaces of the first filter disc and the second filter disc gradually decrease from bottom to top.

[0011] Preferably, the sewage discharge mechanism includes a conical sewage discharge shell fixedly connected to the bottom wall of the treatment tank, and a fixed ring fixedly connected to the surface of the main driving pipe. The surface of the conical sewage discharge shell is provided with a plurality of sewage discharge holes, and the lower surface of the fixed ring is evenly distributed with a plurality of scrapers. The positions of the scrapers correspond to the sewage discharge holes, and a plurality of scrapers are distributed around the outside of the conical sewage discharge shell.

[0012] Preferably, the bottom end of the main drive pipe is rotatably connected to the top of the conical sewage shell, and a sewage pipe is fixedly provided at the bottom end of the treatment tank. The sewage pipe is located directly below the conical sewage shell, and a sewage valve is fixedly provided on the surface of the sewage pipe.

[0013] Preferably, a cleaning assembly is provided on the surface of the main drive tube, and the cleaning assembly includes an extension tube symmetrically arranged on the surface of the main drive tube, and a plurality of recoil nozzles are fixedly provided on the lower surface of the extension tube, and the recoil nozzles are located above the filtering mechanism. A diverter box is fixedly provided on the inner wall of the main drive tube, and the input ends of the two extension tubes extend to the interior of the diverter box. A water supply pipe is rotatably provided on the upper surface of the diverter box, and the top input end of the water supply pipe extends to the outside of the main drive tube, and a water supply switch valve is fixedly provided on the surface of the water supply pipe.

[0014] Preferably, a driving motor is fixedly provided on the upper surface of the processing tank, a driving synchronous wheel is fixedly provided on the rotating shaft of the driving motor, the top end of the main driving tube extends to the outside of the processing tank, and a driven synchronous wheel is fixedly provided on the top of the main driving tube, and a transmission belt is installed between the driving synchronous wheel and the driven synchronous wheel.

[0015] Preferably, the side of the treatment tank is fixedly embedded with a first circulation pipe and a second circulation pipe, and the surface of the treatment tank is fixedly provided with a circulation pump, the input end of the circulation pump is fixedly connected to the output end of the first circulation pipe, and the output end of the circulation pump is fixedly connected to the input end of the second circulation pipe, the surfaces of the first circulation pipe and the second circulation pipe are respectively provided with a discharge three-way valve and a liquid inlet three-way valve, the output end of the discharge three-way valve is fixedly provided with a clean water outlet pipe, and the input end of the liquid inlet three-way valve is fixedly provided with a sewage inlet pipe.

[0016] Preferably, the input port of the first circulation pipe is located above the filtering mechanism, and the output port of the second circulation pipe is located below the filtering mechanism.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention features flexible spacing adjustment capabilities. Through the interaction between the electromagnetic block and the permanent magnet disk, the filter mechanism of the present invention enables flexible adjustment of the spacing between the upper and lower filter discs and the central first filter disc. This design not only enhances the system's adaptability but also greatly simplifies the process of adjusting the filter disc spacing, improving operational efficiency and convenient impurity cleaning. The variable-distance filter mechanism design makes cleaning impurities between the filter discs even easier. When cleaning is required, the magnetic force of the electromagnetic block can be adjusted to change the spacing between the filter discs, providing ample space for flushing and discharging impurities. This effectively prevents impurity accumulation and clogging between the filter discs, extending the service life of the filter mechanism.

[0018] 2. This invention features highly efficient centrifugal cyclone sedimentation and impurity removal. The system employs centrifugal cyclones, leveraging the powerful centrifugal force generated by the cyclone mechanism to rapidly settle and remove larger impurities from the wastewater. This process effectively reduces the burden on subsequent filtration mechanisms and improves overall processing efficiency. The invention also features flexible variable-pitch filter element fine filtration. The invention allows for flexible adjustment of the spacing between the upper and lower second filter discs and the central first filter disc. This variable-pitch filter element design not only accommodates impurity filtration requirements of varying particle sizes, but also effectively removes fine impurities from the wastewater through fine filtration, ensuring effluent quality.

[0019] 3. The present invention realizes real-time dynamic adjustment of the distance between filter discs by dynamically adjusting the magnetic force of the electromagnetic block, realizes closed-loop control of the distance between filter discs, can automatically optimize the filtration effect according to water quality parameters, and can dynamically adjust the swirl speed and filtration parameters according to the processing load. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the present invention; Figure 3 It is a structural schematic diagram of the present invention; Figure 4 It is a structural schematic diagram of the present invention; Figure 5 It is a structural schematic diagram of the present invention; Figure 6 It is a structural schematic diagram of the present invention; Figure 7 for Figure 3 Schematic diagram of the enlarged structure at A in the middle; Figure 8 for Figure 4 Schematic diagram of the enlarged structure at B in the middle; Figure 9 for Figure 4 Schematic diagram of the enlarged structure at point C in the middle.

[0021] Figure: 1. Treatment tank; 2. Filter mechanism; 3. Drain mechanism; 4. Cyclone mechanism; 5. Main drive pipe; 6. Cleaning assembly; 7. Drive motor; 8. Drive synchronous pulley; 9. Driven synchronous pulley; 10. Drive belt; 11. First circulation pipe; 12. Second circulation pipe; 13. Circulating pump; 14. Drain three-way valve; 15. Inlet three-way valve; 16. Clean water outlet pipe; 17. Sewage inlet pipe. 201, first filter disc; 202, second filter disc; 203, fixed plate; 204, limit slide; 205, lifting rod; 206, protective round shell; 207, electromagnetic block; 208, permanent magnet disk; 209, filter hole; 210, return spring; 301, conical sewage shell; 302, fixing ring; 303, sewage hole; 304, scraper; 305, sewage pipe; 306, sewage valve; 401, limit mounting ring; 402, movable shaft; 403, swirl blade; 404, annular fixed shell; 405, linkage gear ring; 406, regulating motor; 407, drive gear; 408, transmission gear; 601. Extension pipe; 602. Recoil nozzle; 603. Diverter box; 604. Water supply pipe; 605. Water supply switch valve. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figures 1-9 The present invention provides a technical solution: an environmentally friendly wastewater treatment system for bio-based fatty acid esters, comprising a treatment tank 1, wherein a filtering mechanism 2, a sewage discharge mechanism 3 and a cyclone mechanism 4 are provided inside the treatment tank 1, and a main driving pipe 5 is provided inside the treatment tank 1 for rotation. It is worth noting that the filtering mechanism 2 includes a first filter disc 201 fixedly connected to the inner wall of the treatment tank 1. Second filter discs 202 are symmetrically arranged on the upper and lower surfaces of the first filter disc 201. Several pairs of corresponding upper and lower fixed plates 203 are fixedly installed on the inner wall of the treatment tank 1. A limit slide 204 is fixedly connected between each pair of fixed plates 203. The surfaces of the two second filter discs 202 are each provided with sliding holes that match the limit slide 204, allowing the second filter discs 202 to slide in connection with the surface of the limit slide 204 through the sliding holes. A lifting rod 205 is fixedly installed on the side of the two second filter discs 202 facing away from each other. A protective circular shell 206 is fixed to the side of the two fixed plates 203 facing away from each other, and an electromagnetic block 207 is fixedly installed on the inner wall of the protective circular shell 206. A permanent magnetic disk 208 is fixedly installed at the end of the lifting rod 205, and the position of the permanent magnetic disk 208 corresponds to that of the electromagnetic block 207. By controlling the magnetic force of the electromagnetic block 207 , the permanent magnetic disk 208 can be attracted or repelled, thereby driving the second filter disk 202 to slide on the limiting slide bar 204 , thereby achieving flexible adjustment of the distance between the filter disks.

[0024] A return spring 210 is sleeved on the surface of the limiting slide 204. One end of the return spring 210 is fixedly connected to the surface of the second filter disc 202, and the other end is fixedly connected to the surface of the fixed plate 203. When the magnetic force of the electromagnetic block 207 disappears or weakens, the return spring 210 pushes the second filter disc 202 back to its original position. Both the first filter disc 201 and the second filter disc 202 are formed with a plurality of filter holes 209, the apertures of which gradually decrease from bottom to top to accommodate impurities of varying particle sizes.

[0025] It is worth noting that the sewage discharge mechanism 3 includes a conical sewage discharge shell 301 fixedly connected to the inner bottom wall of the treatment tank 1, and a fixed ring 302 fixedly connected to the surface of the main drive tube 5. A plurality of sewage discharge holes 303 are provided on the surface of the conical sewage discharge shell 301. A plurality of scraping bars 304 are evenly distributed on the lower surface of the fixed ring 302. The positions of the scraping bars 304 correspond to the sewage discharge holes 303, and a plurality of scraping bars 304 are distributed around the outer side of the conical sewage discharge shell 301. When the main drive tube 5 rotates, the scraping bars 304 can scrape the impurities on the inner wall of the conical sewage discharge shell 301 and discharge them through the sewage discharge holes 303.

[0026] The bottom end of the main drive pipe 5 is rotatably connected to the top of the conical drain housing 301. A drain pipe 305 is fixedly mounted at the bottom of the treatment tank 1, located directly below the conical drain housing 301. A drain valve 306 is fixedly mounted on the surface of the drain pipe 305. By opening drain valve 306, wastewater and impurities at the bottom of the treatment tank 1 can be discharged.

[0027] It is worth noting that the swirl mechanism 4 includes a position-limiting mounting ring 401 fixedly connected to the surface of the main drive tube 5. A plurality of movable shafts 402 are rotatably provided on the lower surface of the position-limiting mounting ring 401, and the bottom ends of the movable shafts 402 are fixedly connected to swirl blades 403. An annular fixed shell 404 is fixedly connected to the upper surface of the position-limiting mounting ring 401, and the position of the annular fixed shell 404 corresponds to the movable shaft 402. A linkage gear ring 405 is rotatably connected to the upper surface of the position-limiting mounting ring 401, and an adjustment motor 406 is fixedly provided inside the position-limiting mounting ring 401. The rotating shaft of the adjustment motor 406 is fixedly connected to a drive gear 407, and the top end of the movable shaft 402 extends to the interior of the annular fixed shell 404 and is fixedly connected to a transmission gear 408.

[0028] Several movable shafts 402 are evenly distributed in a circular array on the surface of the limiting mounting ring 401, and several transmission gears 408 surround the surface of the linkage gear ring 405 and mesh with the linkage gear ring 405. The driving gear 407 is also meshed with the linkage gear ring 405. By starting the adjustment motor 406, the driving gear 407 can be driven to rotate, thereby driving the linkage gear ring 405, the transmission gear 408 and the movable shaft 402 to rotate. The movable shaft 402 drives the swirl blades 403 to rotate, generating a strong centrifugal force to quickly settle and remove larger impurities in the sewage. Several swirl blades 403 are distributed in a spiral radial pattern around the main drive pipe 5 to enhance the swirl effect. It is worth noting that the surface of the main drive tube 5 is provided with a cleaning assembly 6 for cleaning impurities from the filter mechanism 2. The cleaning assembly 6 includes an extension tube 601 symmetrically arranged on the surface of the main drive tube 5. Several backflushing nozzles 602 are fixedly mounted on the lower surface of the extension tube 601. The backflushing nozzles 602 are located above the filter mechanism 2 and are used to spray high-pressure water onto the filter mechanism 2 to flush impurities. A diverter box 603 is fixedly mounted on the inner wall of the main drive tube 5. The input ends of the two extension tubes 601 extend into the interior of the diverter box 603. A water supply pipe 604 is rotatably mounted on the upper surface of the diverter box 603. The top input end of the water supply pipe 604 extends to the exterior of the main drive tube 5. A water supply valve 605 is fixedly mounted on the surface of the water supply pipe 604. By opening the water supply valve 605 and connecting the water source of the water supply pipe 604, water is supplied to the diverter box 603, and the high-pressure water is then sprayed onto the filter mechanism 2 through the extension tube 601 and the backflushing nozzles 602 for cleaning. ‌ It is worth noting that a drive motor 7 is fixedly mounted on the upper surface of the processing tank 1, and a drive synchronous pulley 8 is fixedly mounted on the rotating shaft of the drive motor 7. The top end of the main drive tube 5 extends outside the processing tank 1, and a driven synchronous pulley 9 is fixedly mounted on the top of the main drive tube 5. A transmission belt 10 is installed between the drive synchronous pulley 8 and the driven synchronous pulley 9. By starting the drive motor 7, the drive synchronous pulley 8 is driven to rotate, which in turn drives the driven synchronous pulley 9 and the main drive tube 5 to rotate via the transmission belt 10.

[0029] A first circulation pipe 11 and a second circulation pipe 12 are fixedly embedded in the side of the treatment tank 1, and a circulation pump 13 is fixedly mounted on the surface of the treatment tank 1. The input end of the circulation pump 13 is fixedly connected to the output end of the first circulation pipe 11, and the output end of the circulation pump 13 is fixedly connected to the input end of the second circulation pipe 12. A three-way drain valve 14 and a three-way inlet valve 15 are respectively mounted on the surfaces of the first and second circulation pipes 11, 12. A clean water outlet pipe 16 is fixedly mounted on the output end of the three-way drain valve 14 for discharging treated clean water. A wastewater inlet pipe 17 is fixedly mounted on the input end of the three-way inlet valve 15 for supplying wastewater to be treated into the treatment tank 1. The input port of the first circulation pipe 11 is located above the filter mechanism 2, and the output port of the second circulation pipe 12 is located below the filter mechanism 2. By activating the circulation pump 13 and adjusting the on / off states of the three-way drain valve 14 and the three-way inlet valve 15, wastewater circulation can be achieved.

[0030] Working Principle: Pretreatment (centrifugal cyclone sedimentation): Sewage enters the treatment tank 1. The main drive pipe 5 rotates, driving the cyclone blades 403 to rotate at high speed, generating centrifugal force, causing large particles of impurities (>200μm) to settle toward the tank wall. The large particles of impurities are then discharged through the bottom sewage discharge mechanism 3.

[0031] Fine filtration (variable pitch gradient filtration): The pretreated sewage passes through a three-stage variable pitch filter element. The electromagnetic block 207 controls the distance between the second filter disc 202 and the first filter disc 201. Different levels of filter holes 209 intercept impurities of different particle sizes. The sewage passes upward through the three-stage variable pitch filter element. The electromagnetic block controls the distance between the filter discs (adjustable from 5 to 20mm). The lower layer of 200μm filter holes 209 intercept residual large particles, the middle layer of 100μm filter holes intercept medium particles, and the upper layer of 50μm filter holes 209 filters out fine impurities.

[0032] Self-cleaning (dynamic backwash): When the filtration pressure difference increases, the electromagnetic block 207 generates repulsive force to increase the spacing, and high-pressure water is sprayed through the backwash nozzle 602 to clean the filter element, stripping off impurities and allowing them to settle and discharge for the second time, restoring filtration efficiency.

[0033] Circulation treatment: When needed, the circulation pump 13 is activated to re-inject the upper layer of clean water into the lower layer for secondary filtration until the water quality meets the standard and is discharged through the clean water outlet pipe 16. The system achieves efficient and stable wastewater treatment through the synergistic effect of centrifugal sedimentation and variable pitch filtration.

[0034] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0035] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. An environmentally friendly wastewater treatment system for bio-based fatty acid ester production, comprising a treatment tank (1), characterized in that: The processing tank (1) is provided with a filtering mechanism (2), a sewage discharge mechanism (3) and a cyclone mechanism (4) inside, and a main driving pipe (5) is rotatably provided inside the processing tank (1); The filtering mechanism (2) comprises a first filter disc (201) fixedly connected to the inner wall of the treatment tank (1), and second filter discs (202) are symmetrically arranged on the upper and lower surfaces of the first filter disc (201); The inner wall of the treatment tank (1) is fixedly provided with a plurality of pairs of fixed plates (203) corresponding to upper and lower positions, each pair of fixed plates (203) is fixedly connected with a limit slide bar (204), the surfaces of the two second filter discs (202) are provided with sliding holes matching the limit slide bar (204), the second filter discs (202) are slidably connected to the surface of the limit slide bar (204) through the sliding holes, the surfaces of the two second filter discs (202) away from each other are fixed with a lifting rod (205), and the sides of the two fixed plates (203) away from each other are fixed with a protective round shell (206); An electromagnetic block (207) is fixedly provided on the inner wall of the protective circular shell (206), and a permanent magnetic disk (208) is fixedly provided on the end of the lifting rod (205), wherein the position of the permanent magnetic disk (208) corresponds to that of the electromagnetic block (207); Through the interaction between the electromagnetic block (207) and the permanent magnetic disk (208), flexible adjustment of the distance between the upper and lower second filter disks (202) and the middle first filter disk (201) is achieved.

2. The environmentally friendly wastewater treatment system for bio-based fatty acid ester production according to claim 1, characterized in that: The swirl mechanism (4) comprises a position-limiting mounting ring (401) fixedly connected to the surface of the main driving tube (5); a plurality of movable shafts (402) are rotatably provided on the lower surface of the position-limiting mounting ring (401); the bottom ends of the movable shafts (402) are fixedly connected to swirl blades (403); the upper surface of the position-limiting mounting ring (401) is fixedly connected to an annular fixed shell (404); the position of the annular fixed shell (404) corresponds to the position of the movable shaft (402); the upper surface of the position-limiting mounting ring (401) is rotatably connected to a linkage gear ring (405); an adjusting motor (406) is fixedly provided inside the position-limiting mounting ring (401); the rotating shaft of the adjusting motor (406) is fixedly connected to a driving gear (407); the top end of the movable shaft (402) extends to the inside of the annular fixed shell (404) and is fixedly connected to a transmission gear (408).

3. The environmentally friendly wastewater treatment system for bio-based fatty acid ester production according to claim 2, characterized in that: A plurality of movable shafts (402) are evenly distributed in a circular array on the surface of the position-limiting mounting ring (401), and a plurality of transmission gears (408) surround the surface of the linkage gear ring (405), and the plurality of transmission gears (408) are all engaged with the linkage gear ring (405), the driving gear (407) is engaged with the linkage gear ring (405), and a plurality of swirl blades (403) are distributed in a spiral radial shape around the main driving tube (5).

4. The environmentally friendly wastewater treatment system for bio-based fatty acid ester production according to claim 1, characterized in that: A return spring (210) is sleeved on the surface of the limiting slide rod (204), one end of the return spring (210) is fixedly connected to the surface of the second filter disc (202), and the other end of the return spring (210) is fixedly connected to the surface of the fixed plate (203), and a plurality of filter holes (209) are provided on the surfaces of the first filter disc (201) and the second filter disc (202), and the diameters of the filter holes (209) on the surfaces of the first filter disc (201) and the second filter disc (202) gradually decrease from bottom to top.

5. The environmentally friendly wastewater treatment system for bio-based fatty acid ester production according to claim 1, characterized in that: The sewage discharge mechanism (3) comprises a conical sewage discharge shell (301) fixedly connected to the inner bottom wall of the treatment tank (1), and a fixed ring (302) fixedly connected to the surface of the main driving pipe (5), the surface of the conical sewage discharge shell (301) is provided with a plurality of sewage discharge holes (303), and the lower surface of the fixed ring (302) is evenly distributed with a plurality of scraping strips (304), the positions of the scraping strips (304) correspond to the sewage discharge holes (303), and the plurality of scraping strips (304) are distributed around the outer side of the conical sewage discharge shell (301).

6. The environmentally friendly wastewater treatment system for bio-based fatty acid ester production according to claim 5, characterized in that: The bottom end of the main drive pipe (5) is rotatably connected to the top of the conical sewage discharge shell (301), and a sewage discharge pipe (305) is fixedly provided at the bottom end of the treatment tank (1). The sewage discharge pipe (305) is located directly below the conical sewage discharge shell (301), and a sewage discharge valve (306) is fixedly provided on the surface of the sewage discharge pipe (305).

7. The environmentally friendly wastewater treatment system for bio-based fatty acid ester production according to claim 1, characterized in that: A cleaning assembly (6) is provided on the surface of the main drive tube (5), and the cleaning assembly (6) comprises an extension tube (601) symmetrically provided on the surface of the main drive tube (5), a plurality of backflushing nozzles (602) are fixedly provided on the lower surface of the extension tube (601), and the backflushing nozzles (602) are located above the filtering mechanism (2), and a diversion box (603) is fixedly provided on the inner wall of the main drive tube (5), and the input ends of the two extension tubes (601) both extend to the interior of the diversion box (603), and a water supply pipe (604) is rotatably provided on the upper surface of the diversion box (603), and the top input end of the water supply pipe (604) extends to the outside of the main drive tube (5), and a water supply switch valve (605) is fixedly provided on the surface of the water supply pipe (604).

8. The environmentally friendly wastewater treatment system for bio-based fatty acid ester production according to claim 1, characterized in that: A driving motor (7) is fixedly provided on the upper surface of the processing tank (1), a driving synchronous wheel (8) is fixedly provided on the rotating shaft of the driving motor (7), the top end of the main driving tube (5) extends to the outside of the processing tank (1), and a driven synchronous wheel (9) is fixedly provided on the top of the main driving tube (5), and a transmission belt (10) is installed between the driving synchronous wheel (8) and the driven synchronous wheel (9).

9. The environmentally friendly wastewater treatment system for bio-based fatty acid ester production according to claim 1, characterized in that: A first circulation pipe (11) and a second circulation pipe (12) are fixedly embedded in the side of the treatment tank (1), and a circulation pump (13) is fixedly provided on the surface of the treatment tank (1). The input end of the circulation pump (13) is fixedly connected to the output end of the first circulation pipe (11), and the output end of the circulation pump (13) is fixedly connected to the input end of the second circulation pipe (12). A discharge three-way valve (14) and a liquid inlet three-way valve (15) are respectively provided on the surfaces of the first circulation pipe (11) and the second circulation pipe (12). A clean water outlet pipe (16) is fixedly provided at the output end of the discharge three-way valve (14), and a sewage inlet pipe (17) is fixedly provided at the input end of the liquid inlet three-way valve (15).

10. The environmentally friendly wastewater treatment system for bio-based fatty acid ester production according to claim 9, characterized in that: The input port of the first circulation pipe (11) is located above the filter mechanism (2), and the output port of the second circulation pipe (12) is located below the filter mechanism (2).

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