Multi-stage filtering equipment for recycling wastewater of chemical plant

Abstract

The present invention relates to the technical field of chemical plant wastewater treatment, and discloses a multi-stage filtration device for chemical plant wastewater recovery, the multi-stage filtration device comprises: a sedimentation tank, the outer wall of the sedimentation tank is provided with a purification box, the bottom end of the purification box is fixedly provided with a feeding pipe, and the outer wall of the sedimentation tank is provided with a feeding assembly; the aeration assembly is arranged on the sedimentation tank and is used for carrying out aeration treatment on wastewater in the sedimentation tank, the aeration assembly comprises a moving frame, the outer wall of the moving frame slides on the outer wall of the sedimentation tank, the outer wall, fixedly provided with a sliding rail, of the sedimentation tank slides on the inner wall of the moving frame, a first support is fixed to the outer wall of the moving frame, and a second support is fixed to the outer wall of the first support. A first motor is fixed to the lower surface of the first support. Through cooperation of internal structures of the aeration assembly, the bottom of the sedimentation tank is scraped and cleaned while aeration treatment is performed on the wastewater, and the problem that the aeration efficiency and the wastewater treatment effect are affected due to excessive sludge accumulation at the bottom of the sedimentation tank is solved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical plant wastewater treatment, in particular to multi-stage filtering equipment for chemical plant wastewater recovery. Background Art

[0002] Industrial wastewater is a byproduct of the production process of chemical plants, containing a large number of complex pollutants, such as heavy metals, organic matter, suspended solids and toxic gases. If these pollutants are discharged directly without treatment, they will not only pollute water and soil, but also cause serious harm to the ecological environment and human health. Therefore, in order to meet environmental protection requirements and resource recycling, industrial wastewater treatment has become an important part of the chemical industry. However, due to the complex composition and high pollution concentration of industrial wastewater, its treatment process still faces many technical challenges.

[0003] Existing wastewater treatment technologies mainly rely on methods such as aeration, sedimentation and single-stage filtration, but there are obvious shortcomings. Traditional aeration equipment is usually designed to be simple, resulting in uneven gas distribution and low treatment efficiency. At the same time, sludge accumulation at the bottom of the sedimentation tank is a common problem, which requires frequent manual cleaning, increasing maintenance costs and affecting treatment effects. In addition, chemical wastewater has a complex composition, and a single treatment method is difficult to efficiently remove multiple pollutants, especially some fine suspended solids and soluble organic matter. Existing equipment is often powerless, resulting in effluent water quality that is difficult to meet standards. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a multi-stage filtration equipment for wastewater recovery in chemical plants, which solves the problem that traditional aeration equipment is usually simple in design, resulting in uneven gas distribution and widespread sludge accumulation at the bottom of the sedimentation tank, which requires frequent manual cleaning, increases maintenance costs and affects treatment effects.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a multi-stage filtering device for recycling wastewater from a chemical plant, comprising: a sedimentation tank, the outer wall of which is provided with a purification box, a feed pipe is fixed to the bottom end of the purification box, and a feed assembly is provided on the outer wall of the sedimentation tank; an aeration assembly is arranged on the sedimentation tank and is used to aerate the wastewater inside the sedimentation tank, the aeration assembly comprises a movable frame, the outer wall of the movable frame slides on the outer wall of the sedimentation tank, the outer wall of the sedimentation tank is fixed with a slide rail, and the outer wall of the movable frame is fixed with a bracket 1, the lower surface of the bracket 1 is fixed with a motor 1, a gear is fixed to the driving end of the motor 1, a rack is fixed to the outer wall of the sedimentation tank, and the gear and the rack are meshed. An oxygen generator is fixed to the outer wall of the mobile frame, a hose is fixed to the output end of the oxygen generator, a telescopic rod is fixed to the bottom end of the oxygen generator, the driving end of the telescopic rod is fixed to the outer wall of the hose, a shunt pipe is fixed to the bottom end of the hose, a plurality of nozzles are penetrated through one side of the shunt pipe, a connecting plate is fixed to the lower surface of the shunt pipe, a scraper 1 is fixed to the lower surface of the connecting plate, and the lower surface of the scraper 1 is in contact with the inner bottom of the sedimentation tank; an auxiliary component is arranged inside the sedimentation tank, and is used to assist the aeration component in treating wastewater; a sludge discharge component is arranged on the outer wall of the sedimentation tank, and is used to discharge the sludge at the bottom of the sedimentation tank; a stirring component is arranged inside the purification box, and is used to stir the wastewater inside the purification box.

[0006] Preferably, the feed assembly comprises a hopper, the outer wall of the hopper is fixed to the outer wall of the sedimentation tank, a water inlet pipe is fixed to the bottom end of the hopper, a filter is arranged inside the hopper, and the filter is used to filter large particles in the wastewater.

[0007] Preferably, the sludge discharge assembly includes a sludge pump, the outer wall of the sludge pump is fixed to the outer wall of the sedimentation tank, an extraction pipe is fixed to the input end of the sludge pump, the end of the extraction pipe is fixed to the inside of the sedimentation tank, and a discharge pipe is fixed to the output end of the sludge pump.

[0008] Preferably, one side of the sedimentation tank is connected to an output end of a water pump, a delivery pipe is fixed to the output end of the water pump, and an end of the delivery pipe is arranged above the feed pipe.

[0009] Preferably, the auxiliary component includes a bracket two, the outer wall of the bracket two is fixed to the outer wall of the sedimentation tank, a motor two is fixed to the lower surface of the bracket two, a rotating rod one is fixed to the driving end of the motor two, the outer wall of the rotating rod one rotates inside the sedimentation tank, a transmission wheel one is fixed to the outer wall of the rotating rod one, a belt is provided inside the transmission wheel one, a transmission wheel two is provided on the outer wall of the belt, a rotating rod two rotates inside the transmission wheel two, stirring blades are fixed to the outer walls of the rotating rod one and the rotating rod two, and cutting blades are fixed to the outer walls of the rotating rod one and the rotating rod two.

[0010] Preferably, an activated carbon plate is fixed inside the feed pipe, an ultrafiltration membrane is arranged below the activated carbon plate, and the outer wall of the ultrafiltration membrane is fixed inside the feed pipe.

[0011] Preferably, the stirring assembly comprises a driving motor, an outer wall of the driving motor is fixed to the top of the purification box, a reducer is fixed to the output end of the driving motor, and a rotating rod is fixed to the output end of the reducer.

[0012] Preferably, a stirring rod is fixed to the outer wall of the rotating rod, and a plurality of scrapers 2 are fixed to the outer wall of the stirring rod, and the outer wall of the scrapers 2 is in contact with the inner wall of the purification box.

[0013] Preferably, a connecting pipe runs through one side of the purification box, a storage box is fixed to the top end of the connecting pipe, and the interior of the storage box is used to store treatment agents.

[0014] Preferably, a water outlet pipe is fixed to the bottom end of the purification box, and solenoid valves are provided inside the water outlet pipe and the connecting pipe.

[0015] The present invention provides a multi-stage filtering device for recycling wastewater from a chemical plant. It has the following beneficial effects: 1. The present invention, through the coordination between the internal structures of the aeration components, aerates the wastewater while scraping and cleaning the bottom of the sedimentation tank, thereby solving the problem of excessive sludge accumulation at the bottom of the sedimentation tank, which affects the aeration efficiency and wastewater treatment effect. Directional scraping can prevent secondary pollution caused by long-term accumulation of sludge and reduce the frequency of manual cleaning.

[0016] 2. The present invention achieves the goal of stirring and cutting the gas generated by aeration through the cooperation between the auxiliary components and the sludge removal components, further improving the effect of aeration treatment of wastewater, and solving the problem of low wastewater treatment efficiency caused by uneven aeration in traditional aeration devices. The cutting and stirring functions help to further break up the suspended matter in the wastewater and improve the treatment effect of subsequent sedimentation and filtration processes.

[0017] 3. The present invention achieves the goal of re-purifying wastewater after sedimentation treatment through the coordination between the treatment agent and the stirring component inside the storage box, achieving the effect of multi-stage filtration to improve the efficiency of wastewater purification and solve the problem that traditional equipment cannot efficiently treat complex wastewater. The treatment agent is evenly dispersed in the wastewater through stirring, ensuring a more complete reaction and reducing agent waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the present invention; Figure 2 It is a partial structural schematic diagram of a sedimentation tank of the present invention; Figure 3 It is a schematic diagram of the internal structure of the sedimentation tank of the present invention; Figure 4 It is a partial structural schematic diagram of the aeration assembly of the present invention; Figure 5 It is a schematic diagram of the structure of the auxiliary component part of the present invention; Figure 6 It is a schematic diagram of the internal structure of the purification box of the present invention; Figure 7 It is a partial structural schematic diagram of the stirring component of the present invention.

[0019] Among them, 1. sedimentation tank; 2. purification box; 3. feed assembly; 301. hopper; 302. filter; 303. water inlet pipe; 4. aeration assembly; 401. mobile frame; 402. slide rail; 403. bracket 1; 404. motor 1; 405. gear; 406. rack; 407. oxygen generator; 408. telescopic rod; 409. hose; 410. diverter pipe; 411. nozzle; 412. connecting plate; 413. scraper 1; 5. auxiliary assembly; 501. bracket 2; 502. motor 2; 503. rotating rod 1; 504 , driving wheel one; 505, belt; 506, driving wheel two; 507, stirring blade; 508, cutting blade; 509, rotating rod two; 6, sludge discharge assembly; 601, sludge pump; 602, extraction pipe; 603, discharge pipe; 7, water pump; 8, delivery pipe; 9, stirring assembly; 901, driving motor; 902, reducer; 903, rotating rod; 904, stirring rod; 905, scraper two; 10, feed pipe; 11, activated carbon plate; 12, ultrafiltration membrane; 13, water outlet pipe; 14, solenoid valve; 15, storage box; 16, connecting pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0021] Please refer to the attached Figure 1 - Attachment Figure 4The embodiment of the present invention provides a multi-stage filtering device for recycling wastewater from a chemical plant, comprising: a sedimentation tank 1, the outer wall of which is provided with a purification box 2, the bottom end of which is fixed with a feed pipe 10, and the outer wall of the sedimentation tank 1 is provided with a feed assembly 3; an aeration assembly 4, which is arranged on the sedimentation tank 1 and is used to aerate the wastewater inside the sedimentation tank 1, the aeration assembly 4 comprises a mobile frame 401, the outer wall of the mobile frame 401 slides on the outer wall of the sedimentation tank 1, the outer wall of the sedimentation tank 1 is fixed with a slide rail 402, and the outer wall of the mobile frame 401 slides on the inner wall of the mobile frame 401, and the outer wall of the mobile frame 401 is fixed with a slide rail 402. A bracket 403 is fixed to the outer wall, a motor 404 is fixed to the lower surface of the bracket 403, a gear 405 is fixed to the driving end of the motor 404, a rack 406 is fixed to the outer wall of the sedimentation tank 1, the gear 405 and the rack 406 are meshed, an oxygen generator 407 is fixed to the outer wall of the mobile frame 401, a hose 409 is fixed to the output end of the oxygen generator 407, a telescopic rod 408 is fixed to the bottom end of the oxygen generator 407, the driving end of the telescopic rod 408 is fixed to the outer wall of the hose 409, and a shunt pipe 41 is fixed to the bottom end of the hose 409 0, a plurality of nozzles 411 are passed through one side of the shunt pipe 410, a connecting plate 412 is fixed to the lower surface of the shunt pipe 410, a scraper 413 is fixed to the lower surface of the connecting plate 412, and the lower surface of the scraper 413 is in contact with the inner bottom of the sedimentation tank 1; an auxiliary component 5 is arranged inside the sedimentation tank 1 to assist the aeration component 4 in treating the wastewater; a sludge discharge component 6 is arranged on the outer wall of the sedimentation tank 1 to discharge the sludge at the bottom of the sedimentation tank 1; a stirring component 9 is arranged inside the purification tank 2 to treat the wastewater inside the purification tank 2 The feed component 3 includes a hopper 301, the outer wall of the hopper 301 is fixed to the outer wall of the sedimentation tank 1, an inlet pipe 303 is fixed to the bottom end of the hopper 301, a filter screen 302 is arranged inside the hopper 301, and the filter screen 302 is used to filter large particles in the wastewater. The sludge discharge component 6 includes a sludge pump 601, the outer wall of the sludge pump 601 is fixed to the outer wall of the sedimentation tank 1, an extraction pipe 602 is fixed to the input end of the sludge pump 601, and the end of the extraction pipe 602 is fixed to the inside of the sedimentation tank 1, and a discharge pipe 603 is fixed to the output end of the sludge pump 601.

[0022] Specifically, the filter screen 302 is used to filter the incoming wastewater for preliminary particle filtration to remove large particle impurities to avoid obstruction of subsequent treatment processes. At the same time, the aeration component 4 is used to achieve efficient aeration of the wastewater. The oxygen generator 407 provides a stable oxygen supply, and oxygen is uniformly injected into the wastewater through the nozzle 411 to accelerate the degradation reaction of organic matter. The depth of the nozzle 411 is adjusted in conjunction with the telescopic rod 408 to enhance the flexibility of aeration and optimize the oxygen utilization rate. The scraper 413 cleans the sludge at the bottom of the sedimentation tank 1 during the aeration process to effectively avoid secondary pollution caused by long-term accumulation of sludge. The sludge pump 601 quickly discharges the bottom sludge to the outside of the discharge pipe 603 through the extraction pipe 602, further reducing maintenance costs and manual cleaning frequency. The overall structure realizes the automatic operation of the mobile frame 401 through the cooperation of the gear 405 and the rack 406 to expand the treatment range, ensure the overall improvement of wastewater treatment efficiency, reduce the demand for chemicals and reduce operating energy consumption, and optimize the automation level and adaptability of equipment operation, which can meet the recycling and utilization needs of complex wastewater in chemical plants.

[0023] Please refer to the attached Figure 5 - Attachment Figure 7 One side of the sedimentation tank 1 is connected to the output end of the water pump 7, and a delivery pipe 8 is fixed to the output end of the water pump 7. The end of the delivery pipe 8 is arranged above the feed pipe 10. The auxiliary component 5 includes a bracket 2 501. The outer wall of the bracket 2 501 is fixed to the outer wall of the sedimentation tank 1. A motor 2 502 is fixed to the lower surface of the bracket 2 501. A rotating rod 1 503 is fixed to the driving end of the motor 2 502. The outer wall of the rotating rod 1 503 rotates inside the sedimentation tank 1. A transmission wheel 1 504 is fixed to the outer wall of the rotating rod 1 503. A belt 505 is arranged inside the transmission wheel 1 504. A transmission wheel 2 506 is arranged on the outer wall of the belt 505. A rotating rod 2 509 rotates inside the transmission wheel 2 506. The outer walls of the rotating rod 1 503 and the rotating rod 2 509 are both fixed with stirring blades 507. The outer walls of the rotating rod 1 503 and the rotating rod 2 509 are both fixed with cutting blades 508. Feed An activated carbon plate 11 is fixed inside the tube 10, an ultrafiltration membrane 12 is arranged below the activated carbon plate 11, the outer wall of the ultrafiltration membrane 12 is fixed inside the feed tube 10, the stirring assembly 9 includes a driving motor 901, the outer wall of the driving motor 901 is fixed to the top of the purification box 2, a reducer 902 is fixed to the output end of the driving motor 901, a rotating rod 903 is fixed to the output end of the reducer 902, a stirring rod 904 is fixed to the outer wall of the rotating rod 903, a plurality of scrapers 905 are fixed to the outer wall of the stirring rod 904, the outer wall of the scraper 905 is in contact with the inner wall of the purification box 2, a connecting pipe 16 passes through one side of the purification box 2, a storage box 15 is fixed to the top of the connecting pipe 16, the interior of the storage box 15 is used to store treatment agents, a water outlet pipe 13 is fixed to the bottom end of the purification box 2, and solenoid valves 14 are arranged inside the water outlet pipe 13 and the connecting pipe 16.

[0024] Specifically, the wastewater is transported to the feed pipe 10 through the delivery pipe 8 by the cooperation of the sedimentation tank 1 and the water pump 7. The activated carbon plate 11 arranged in the feed pipe 10 can efficiently adsorb organic pollutants and some harmful substances in the wastewater, and further remove tiny particles and colloidal impurities through the ultrafiltration membrane 12 to improve the water purification effect. The auxiliary component 5 uses the motor 2 502 to drive the rotating rod 1 503 to rotate, and drives the transmission wheel 1 504 to be linked with the transmission wheel 2 506 through the belt 505, so that the rotating rod 2 509 rotates synchronously, and the stirring blade 507 forms a strong stirring flow field in the wastewater, effectively and evenly disperses the pollutants, and at the same time the cutting blade 508 further removes larger particles. The particles are broken up to improve the subsequent filtration efficiency. The driving motor 901 drives the reducer 902 and the rotating rod 903 to rotate. The stirring rod 904 cooperates with the scraper 905 to run against the inner wall of the purification box 2, which not only improves the reaction efficiency of the purification agent and the wastewater, but also prevents the sediment from accumulating on the inner wall of the purification box 2. The treatment agent stored in the storage box 15 is transported to the purification box 2 through the connecting pipe 16, and is accurately added under the control of the solenoid valve 14, thereby optimizing the efficiency of the agent use and reducing the cost. The treated water is output to the subsequent process through the outlet pipe 13, which significantly improves the wastewater purification efficiency, effectively removes a variety of pollutants, reduces manual intervention and improves the operation stability.

[0025] Working principle: oxygen generator 407 generates oxygen and injects gas into sedimentation tank 1 through hose 409 and shunt pipe 410. Nozzle 411 on shunt pipe 410 releases gas evenly for aeration. Connecting plate 412 drives scraper 1 413 to contact the bottom of sedimentation tank 1. Through the sliding cooperation of movable frame 401 on slide rail 402, sludge at the bottom of sedimentation tank 1 is scraped and cleaned during aeration to reduce accumulation and prevent secondary pollution. Bracket 2 501 in auxiliary component 5 fixes motor 2 502, drives rotating rod 1 503 to rotate and drives transmission wheel 1 504 to rotate through belt 505 connected to transmission wheel 2 506. Rotating rod 2 509 drives stirring blade 507 and cutting blade 508 to operate, further stirring wastewater and cutting bubbles to improve aeration efficiency. At the same time, sludge pump 6 01 The sludge at the bottom of the sedimentation tank 1 is extracted through the extraction pipe 602 and discharged through the discharge pipe 603; after the wastewater is treated by sedimentation, it is transported to the purification box 2 by the water pump 7 through the delivery pipe 8. The stirring assembly 9 inside the purification box 2 drives the reducer 902 and the rotating rod 903 to rotate through the driving motor 901. The stirring rod 904 evenly disperses the treatment agent transported to the connecting pipe 16 in the storage box 15, and the scraper 905 is attached to the inner wall of the purification box 2 to perform deep stirring treatment on the precipitated wastewater. At the same time, the activated carbon plate 11 arranged in the feed pipe 10 absorbs organic matter, and the ultrafiltration membrane 12 filters tiny particles to further purify the water quality. Finally, the outlet pipe 13 at the bottom of the purification box 2 controls the output of the treated water through the solenoid valve 14, completing the multi-stage filtration process and ensuring efficient purification effect.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage filtration device for recycling wastewater from chemical plants, characterized in that: include: A sedimentation tank (1) is provided with a purification box (2) on its outer wall, a feed pipe (10) is fixed to the bottom end of the purification box (2), and a feed assembly (3) is provided on the outer wall of the sedimentation tank (1); An aeration component (4) is arranged on a sedimentation tank (1) and is used to perform aeration treatment on wastewater inside the sedimentation tank (1). The aeration component (4) comprises a movable frame (401). The outer wall of the movable frame (401) slides on the outer wall of the sedimentation tank (1). The outer wall of the sedimentation tank (1) is fixed with a slide rail (402), and the outer wall slides on the inner wall of the movable frame (401). The outer wall of the movable frame (401) is fixed with a bracket 1 (403). The lower surface of the bracket 1 (403) is fixed with a motor 1 (404). The driving end of the motor 1 (404) is fixed with a gear (405). The outer wall of the sedimentation tank (1) is fixed with a rack (406). The gear (405) and the rack (406) are mutually connected. The movable frame (401) is meshed, an oxygen generator (407) is fixed to the outer wall of the movable frame (401), a hose (409) is fixed to the output end of the oxygen generator (407), a telescopic rod (408) is fixed to the bottom end of the oxygen generator (407), a driving end of the telescopic rod (408) is fixed to the outer wall of the hose (409), a shunt pipe (410) is fixed to the bottom end of the hose (409), a plurality of nozzles (411) are passed through one side of the shunt pipe (410), a connecting plate (412) is fixed to the lower surface of the shunt pipe (410), a scraper plate 1 (413) is fixed to the lower surface of the connecting plate (412), and the lower surface of the scraper plate 1 (413) is in contact with the inner bottom of the sedimentation tank (1); An auxiliary component (5) is arranged inside the sedimentation tank (1) and is used to assist the aeration component (4) in treating wastewater; A sludge discharge assembly (6), which is arranged on the outer wall of the sedimentation tank (1) and is used to discharge sludge at the bottom of the sedimentation tank (1); A stirring assembly (9) is arranged inside the purification box (2) and is used to stir the wastewater inside the purification box (2).

2. The multi-stage filtration equipment for recycling wastewater from a chemical plant according to claim 1, characterized in that: The feed assembly (3) comprises a hopper (301), the outer wall of the hopper (301) being fixed to the outer wall of the sedimentation tank (1), a water inlet pipe (303) being fixed to the bottom end of the hopper (301), and a filter screen (302) being arranged inside the hopper (301), the filter screen (302) being used to filter large particles in the wastewater.

3. The multi-stage filtration equipment for recycling wastewater from a chemical plant according to claim 1, characterized in that: The sludge discharge assembly (6) comprises a sludge pump (601), the outer wall of the sludge pump (601) is fixed to the outer wall of the sedimentation tank (1), an extraction pipe (602) is fixed to the input end of the sludge pump (601), the end of the extraction pipe (602) is fixed to the inside of the sedimentation tank (1), and a discharge pipe (603) is fixed to the output end of the sludge pump (601).

4. The multi-stage filtration equipment for recycling wastewater from a chemical plant according to claim 1, characterized in that: One side of the sedimentation tank (1) is connected to the output end of a water pump (7), a delivery pipe (8) is fixed to the output end of the water pump (7), and an end of the delivery pipe (8) is arranged above the feed pipe (10).

5. The multi-stage filtration equipment for recycling wastewater from a chemical plant according to claim 1, characterized in that: The auxiliary component (5) comprises a second bracket (501), the outer wall of the second bracket (501) is fixed to the outer wall of the sedimentation tank (1), a second motor (502) is fixed to the lower surface of the second bracket (501), a first rotating rod (503) is fixed to the driving end of the second motor (502), the outer wall of the first rotating rod (503) rotates inside the sedimentation tank (1), a first transmission wheel (504) is fixed to the outer wall of the first rotating rod (503), a belt (505) is arranged inside the first transmission wheel (504), a second transmission wheel (506) is arranged on the outer wall of the belt (505), a second rotating rod (509) is rotated inside the second transmission wheel (506), stirring blades (507) are fixed to the outer walls of the first rotating rod (503) and the second rotating rod (509), and cutting blades (508) are fixed to the outer walls of the first rotating rod (503) and the second rotating rod (509).

6. The multi-stage filtration equipment for recycling wastewater from a chemical plant according to claim 1, characterized in that: An activated carbon plate (11) is fixed inside the feed pipe (10), an ultrafiltration membrane (12) is arranged below the activated carbon plate (11), and the outer wall of the ultrafiltration membrane (12) is fixed inside the feed pipe (10).

7. The multi-stage filtration equipment for recycling wastewater from a chemical plant according to claim 1, characterized in that: The stirring assembly (9) comprises a driving motor (901), the outer wall of the driving motor (901) is fixed to the top of the purification box (2), a reducer (902) is fixed to the output end of the driving motor (901), and a rotating rod (903) is fixed to the output end of the reducer (902).

8. The multi-stage filtration equipment for recycling wastewater from a chemical plant according to claim 7, characterized in that: A stirring rod (904) is fixed to the outer wall of the rotating rod (903), and a plurality of scrapers (905) are fixed to the outer wall of the stirring rod (904). The outer wall of the scrapers (905) fits the inner wall of the purification box (2).

9. The multi-stage filtration equipment for recycling wastewater from a chemical plant according to claim 1, characterized in that: A connecting pipe (16) passes through one side of the purification box (2), a storage box (15) is fixed to the top end of the connecting pipe (16), and the interior of the storage box (15) is used to store treatment agents.

10. The multi-stage filtration equipment for recycling wastewater from a chemical plant according to claim 1, characterized in that: A water outlet pipe (13) is fixed to the bottom end of the purification box (2), and a solenoid valve (14) is provided inside the water outlet pipe (13) and the connecting pipe (16).

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