A pretreatment device for printing and dyeing wastewater
By incorporating a mixing tank, decolorizing tank, and filtration tank within the enclosure, and combining intermittent dosing with ozone decolorization technology, the problems of impurity accumulation and excessive reagents in the pretreatment device for dyeing and printing wastewater are solved, achieving efficient wastewater treatment and stable equipment operation.
Patent Information
- Application Number
- CN202610988823.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-03
- Publication Date
- 2026-07-31
AI Technical Summary
Existing dyeing and printing wastewater pretreatment devices are prone to impurity accumulation during sedimentation, which affects the normal operation of the equipment. Furthermore, excessive addition of chemicals may lead to secondary chemical pollution of the wastewater.
The system employs a structure consisting of a mixing tank, a decolorizing tank, and a filtration tank within the casing. Through intermittent dosing, ozone decolorization, and centrifugal filtration, combined with mechanical structures such as a ratchet limiting plate and a reciprocating screw, it achieves effective wastewater treatment and impurity discharge.
It achieves efficient pretreatment of dyeing and printing wastewater, prevents secondary pollution of wastewater caused by excessive chemicals, increases the contact area between wastewater and gas, improves the decolorization effect, and cleans impurities in the equipment in a timely manner to ensure normal operation of the equipment.
Smart Images
Figure CN122482607A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of dyeing and printing wastewater treatment technology, specifically to a pretreatment device for dyeing and printing wastewater. Background Technology
[0002] A pretreatment device for dyeing and printing wastewater refers to a series of equipment and technical systems that pre-purify dyeing and printing wastewater using a series of physical, chemical, and biological methods before it enters the core biological treatment system. Dyeing and printing wastewater contains a large amount of dyes, auxiliaries, surfactants, fiber debris, and recalcitrant organic matter, and is characterized by high color, high COD, and poor biodegradability, making direct treatment extremely difficult. The pretreatment device is used to remove suspended solids, fibers, and some dyes, while also regulating the water quality and quantity, clearing obstacles for subsequent biological treatment, and ensuring the stable operation of the entire wastewater treatment system.
[0003] Patent CN216106447U discloses an environmentally friendly wastewater treatment device for textile printing and dyeing workshops, including a wastewater treatment tank. A first partition and a second partition are fixedly connected to the inner wall of the wastewater treatment tank. The space formed by one side of the first partition and one side of the inner wall of the wastewater treatment tank is a sedimentation zone. A settling mechanism is installed inside the sedimentation zone. This environmentally friendly wastewater treatment device for textile printing and dyeing workshops, through the settling mechanism, includes a motor, support base, roller, capillary pores, fixing block, rotating shaft, and polyaluminum chloride. Wastewater sprayed from the first nozzle drives the roller to rotate. Simultaneously, wastewater enters the roller through the capillary pores and combines with the polyaluminum chloride. The motor drives the rotating shaft to rotate, and the rotating shaft causes the wastewater entering the roller through the capillary pores to fully mix with the polyaluminum chloride. The rotation of the roller allows the dissolved polyaluminum chloride solution to permeate into the wastewater through the capillary pores. The rotation of the roller ensures full contact between the solution and the wastewater, achieving a sedimentation effect. However, the above device is prone to problems when dealing with sedimentation impurities, such as excessive accumulation of impurities in the equipment. If these impurities cannot be cleaned in time, it will affect the normal operation of the equipment. Therefore, a pretreatment device for printing and dyeing wastewater is proposed to solve the above problems. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a pretreatment device for dyeing and printing wastewater, which addresses the shortcomings of the prior art.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a pretreatment device for dyeing and printing wastewater, comprising a box body, a support fixedly connected to the circumference of the box body, a mixing tank and a decolorizing tank arranged on the inner wall of the box body, a filter box arranged on the rear side of the decolorizing tank, a dosing mechanism arranged on the circumference of the box body, a main shaft rotatably connected to the inner wall of the box body, the mixing tank including an active plate, a spring sleeve fixedly connected to the front side of the active plate, a stirring frame slidably connected to the inner wall of the spring sleeve, a collecting plate slidably connected to the side of the stirring frame, a top plate fixedly connected to the inner wall of the box body, a bottom plate fixedly connected to the inner wall of the box body, and a discharge plate slidably connected to the inner wall of the bottom plate. A fixed plate is connected to the front side of the material plate by a spring. A ratchet limiting plate is slidably connected to the side of the bottom plate. A rotating plate shaft is fixedly connected to the side of the ratchet limiting plate. A rotating plate is rotatably connected to the circumferential surface of the rotating plate shaft. A protrusion is slidably connected to the inner wall of the ratchet limiting plate by a spring. A ratchet fixing plate is fixedly connected to the inner wall of the box. A ratchet shaft is fixedly connected to the inner wall of the box. A ratchet is rotatably connected to the circumferential surface of the ratchet shaft. A top plate is fixedly connected to the inner wall of the box. A limiting spring rod is slidably connected to the inner wall of the discharge plate. A limiting block is fixedly connected to the inner wall of the box. The dosing mechanism includes a medicine box. A dosing baffle is fixedly connected to the inner wall of the medicine box. A spring column is connected to the bottom of the dosing baffle by a spring. The spring sleeve... The cylinder has a sliding groove on its side. The stirring rack is connected to the inner wall of the spring sleeve by a spring. The side of the ratchet away from the ratchet limiting plate is connected to the rear side of the ratchet fixing plate by a spring. The bottom surface of the rotating plate is in contact with the side of the ratchet limiting plate. The spring column is in contact with the top of the dosing baffle. The driving plate is movably connected to the circumference of the main shaft. The housing has a threaded groove at the end near the mixing tank. The driving plate is movably connected to the inner wall of the housing. The main shaft has a bidirectional threaded groove at the end near the mixing tank. The collecting plate is movably connected to the circumference of the main shaft. When the equipment starts, the output end of the external motor drives the main shaft to rotate. The rotation of the main shaft drives the driving plate to rotate. The driving plate rotates and slides forward along the threaded groove. When the driving plate moves to the dosing position... When the mechanism is within its working range, the active plate moves the spring column upwards, compressing the spring connecting the spring column and the dosing baffle. At this time, the chemical solution flows into the mixing tank through the inlet on the tank body, completing the dosing. When the active plate moves out of the working range of the dosing mechanism, the spring connecting the spring column and the dosing baffle returns to its original position, moving the spring column downwards to complete the reset. This completes the intermittent dosing in the mixing tank, reducing the risk of secondary water pollution due to excessive chemical dosage. The active plate then continues to move forward, driving the collecting plate. When the collecting plate moves and directly contacts the discharge plate, it drives the discharge plate forward, compressing the spring connecting the discharge plate and the fixed plate. The discharge plate then drives the ratchet to rotate on the circumference of the ratchet shaft.The spring connecting the ratchet and the ratchet fixing plate is compressed, and the ratchet fixes the discharge plate. Meanwhile, the main shaft continues to rotate, causing the drive plate to slide backward, discharging the waste material between the collection plate and the discharge plate from the mixing box. When the drive plate slides backward, causing the collection plate to slide backward into the working range of the rotating plate, the spring force of the connecting protrusion is slightly greater than that of the spring connecting the ratchet limiting plate. The collection plate then causes the rotating plate to slide backward, which in turn causes the protrusion to move backward. The protrusion then causes the ratchet limiting plate to move backward. When the ratchet limiting plate moves out of the ratchet's constraint range, the ratchet loses its constraint effect. The spring connecting the ratchet and the ratchet fixing plate resets, causing the ratchet to rotate on the circumference of the ratchet shaft. Simultaneously, the spring connecting the discharge plate and the fixing plate rebounds, causing the discharge plate to move backward to complete its reset.
[0006] Preferably, the decolorizing chamber includes a stirring plate, a cross-plate shaft, a gear ring, a gas supply pipe, a gas tank, a partition, and a cross-plate. The stirring plate is fixedly connected to the circumferential surface of the main shaft, the cross-plate shaft is fixedly connected to the inner wall of the stirring plate, and the cross-plate is rotatably connected to the circumferential surface of the cross-plate shaft. The gear ring is fixedly connected to the inner wall of the chamber, and the gas tank is fixedly connected to the circumferential surface of the chamber. A gas supply pipe is fixedly connected to the surface of the gas tank. The cross-plate meshes with the gear ring, and a gas circulation device is provided inside the gas tank. The sides of the cross-plate and the stirring plate... When the equipment is working in the decolorization tank, the main shaft drives the agitator to rotate, the agitator rotates, and the cross plate shaft rotates, which in turn drives the cross plate to rotate. At this time, ozone in the gas tank is added to the decolorization tank through the circulation device inside the gas tank to achieve decolorization treatment of wastewater. While the cross plate rotates, the cross plate rotates in the opposite direction to the main shaft on the circumferential surface of the cross plate shaft through the toothed ring that meshes with the cross plate. Through the bidirectional rotation of the agitator and the cross plate, the contact area between wastewater and ozone is increased, resulting in a better decolorization effect.
[0007] Preferably, the filter box includes a screen cylinder bottom plate, a screen cylinder, a reciprocating screw, rollers, scrapers, a spiral plate, and a screen cylinder top plate. The screen cylinder bottom plate is fixedly connected to the bottom of the screen cylinder, the screen cylinder is fixedly connected to the circumferential surface of the main shaft, the spiral plate is fixedly connected to the inner wall of the screen cylinder, the screen cylinder top plate is fixedly connected to the inner wall of the box body, the reciprocating screw is rotatably connected to the inner wall of the screen cylinder bottom plate, the rollers are fixedly connected to the circumferential surface of the reciprocating screw, the scraper is movably connected to the circumferential surface of the reciprocating screw, the scraper is slidably connected to the outer surface of the screen cylinder, the side of the rollers is in contact with the screen cylinder bottom plate, the scraper is slidably connected to the inner wall of the box body, the screen cylinder bottom plate is rotatably connected to the inner wall of the box body, the circumferential surface of the drive plate is in contact with the bottom end of the spring column, and the surface of the box body... The equipment is equipped with a dosing port, an air inlet, and an air outlet. The gas inside the gas tank is ozone. When the main shaft rotates, it drives the screen cylinder fixedly connected to the main shaft to rotate. The rotation of the screen cylinder drives the spiral plate to rotate, separating the foreign matter remaining in the sewage from the water using centrifugal force. The foreign matter is then discharged into the screen cylinder along the trajectory of the spiral plate. At the same time, the screen cylinder drives the screen cylinder bottom plate to rotate, which in turn drives the reciprocating screw to rotate. The reciprocating screw drives the roller to rotate, and the roller contacts and rotates against the inner wall of the tank. The roller drives the reciprocating screw to rotate on the inner wall of the screen cylinder bottom plate, and the rotation of the reciprocating screw drives the scraper to slide on the inner wall of the tank, scraping off the waste material that has settled from the sewage, preventing excessive accumulation of impurities inside the equipment and affecting its normal operation.
[0008] The present invention, by adopting the above technical solution, can bring the following beneficial effects: 1. This pretreatment device for dyeing and printing wastewater, through the coordinated action of the top plate, active plate, spring sleeve, stirring frame, collecting plate, bottom plate, discharge plate, fixed plate, limit spring rod, ratchet limit plate, ratchet fixed plate, ratchet shaft, rotating plate shaft, rotating plate, protrusion, limit block, ratchet, medicine tank, spring column and dosing baffle, realizes intermittent dosing of dyeing and printing wastewater, preventing secondary chemical pollution of wastewater due to excessive addition of chemicals. The reciprocating active plate discharges the treated impurities from the wastewater from the equipment, preventing the equipment from malfunctioning due to excessive accumulation of impurities.
[0009] 2. This pretreatment device for dyeing and printing wastewater achieves decolorization treatment of wastewater through the coordinated operation of the stirring plate, cross plate rotating shaft, gear ring, air supply pipe, air tank, partition plate and cross plate. The rotating cross plate increases the contact area between wastewater and gas, greatly improving the decolorization effect of the equipment.
[0010] 3. This pretreatment device for dyeing and printing wastewater achieves the filtration of residual foreign matter in the wastewater through the coordinated operation of the bottom plate of the screen cylinder, the screen cylinder, the reciprocating screw, the roller, the scraper, the spiral plate and the top plate of the screen cylinder, which further improves the wastewater treatment effect. The reciprocating sliding scraper allows the sedimented impurities in the equipment to be cleaned in time, which greatly improves the working efficiency of the equipment. Attached Figure Description
[0011] Figure 1 This is a half-sectional view of the box structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the mixing tank structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of a portion of point A in the middle; Figure 5 For the present invention Figure 3 Enlarged view of a section at point B in the middle; Figure 6 This is a schematic diagram of the active plate structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of a section at point C; Figure 8 This is a schematic diagram of the decolorization box structure of the present invention; Figure 9 This is a schematic diagram of the filter box structure of the present invention.
[0012] In the diagram: 1. Box body; 2. Support frame; 3. Mixing box; 301. Top plate; 302. Active plate; 303. Spring sleeve; 304. Mixing rack; 305. Collection plate; 306. Bottom plate; 307. Discharge plate; 308. Fixing plate; 309. Limiting spring rod; 310. Ratchet limiting plate; 311. Ratchet fixing plate; 312. Ratchet shaft; 313. Rotating plate shaft; 314. Rotating plate; 315. Protrusion; 316. Limiting block; 317. Ratchet; 4. Dosing mechanism; 401. Medicine tank; 402. Spring column; 403. Dosing baffle; 5. Decolorization box; 501. Stirring plate; 502. Cross plate shaft; 503. Gear ring; 504. Gas pipe; 505. Gas tank; 506. Baffle; 507. Cross plate; 6. Main shaft; 7. Filter box; 701. Screen cylinder bottom plate; 702. Screen cylinder; 703. Reciprocating screw; 704. Roller; 705. Scraper; 706. Spiral plate; 707. Screen cylinder top plate. Detailed Implementation
[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0014] Please see Figures 1-9One embodiment of the present invention is as follows: a pretreatment device for dyeing and printing wastewater includes a box body 1, a support 2 fixedly connected to the circumferential surface of the box body 1, a mixing tank 3 and a decolorizing tank 5 arranged on the inner wall of the box body 1, a filter box 7 arranged on the rear side of the decolorizing tank 5, a dosing mechanism 4 arranged on the circumferential surface of the box body 1, and a main shaft 6 rotatably connected to the inner wall of the box body 1. The mixing tank 3 includes an active plate 302, a spring sleeve 303 fixedly connected to the front side of the active plate 302, a stirring frame 304 slidably connected to the inner wall of the spring sleeve 303, and a collecting plate 305 slidably connected to the side of the stirring frame 304. The inner wall of the box body 1 is fixedly connected to... The box 1 has a top plate 301. A bottom plate 306 is fixedly connected to the inner wall of the box 1. A discharge plate 307 is slidably connected to the inner wall of the bottom plate 306. A fixing plate 308 is connected to the front side of the discharge plate 307 via a spring. A ratchet limiting plate 310 is slidably connected to the side of the bottom plate 306. A rotating plate shaft 313 is fixedly connected to the side of the ratchet limiting plate 310. A rotating plate 314 is rotatably connected to the circumferential surface of the rotating plate shaft 313. A protrusion 315 is slidably connected to the inner wall of the ratchet limiting plate 310 via a spring. A ratchet fixing plate 311 is fixedly connected to the inner wall of the box 1. A ratchet shaft 312 is fixedly connected to the inner wall of the box 1. A ratchet is rotatably connected to the circumferential surface of the ratchet shaft 312. Wheel 317, top plate 301 fixedly connected to the inner wall of box 1, limit spring rod 309 slidably connected to the inner wall of discharge plate 307, limit block 316 fixedly connected to the inner wall of box 1, reciprocating active plate 302 discharges treated impurities from wastewater to the equipment to prevent the equipment from malfunctioning due to excessive accumulation of impurities. Dosing mechanism 4 includes a medicine tank 401, dosing baffle 403 fixedly connected to the inner wall of medicine tank 401, spring column 402 connected to the bottom of dosing baffle 403 by spring, sliding groove opened on the side of spring sleeve 303, stirring frame 304 connected to the inner wall of spring sleeve 303 by spring, ratchet. The side of 317 away from the ratchet limiting plate 310 is connected to the rear side of the ratchet fixing plate 311 by a spring. The bottom surface of the rotating plate 314 is in contact with the side of the ratchet limiting plate 310. The spring column 402 is in contact with the top of the dosing baffle 403. The active plate 302 is movably connected on the circumferential surface of the main shaft 6. The box 1 has a threaded groove at the end near the mixing box 3. The active plate 302 is movably connected to the inner wall of the box 1. The main shaft 6 has a bidirectional threaded groove at the end near the mixing box 3. The collecting plate 305 is movably connected to the circumferential surface of the main shaft 6. This realizes intermittent dosing of dyeing and printing wastewater and prevents secondary chemical pollution of wastewater due to excessive addition of chemicals.
[0015] The decolorization chamber 5 includes a stirring plate 501, a cross plate rotating shaft 502, a gear ring 503, an air supply pipe 504, an air tank 505, a partition plate 506, and a cross plate 507. The stirring plate 501 is fixedly connected to the circumferential surface of the main shaft 6, the cross plate rotating shaft 502 is fixedly connected to the inner wall of the stirring plate 501, the cross plate 507 is rotatably connected to the circumferential surface of the cross plate rotating shaft 502, the gear ring 503 is fixedly connected to the inner wall of the chamber 1, and the air tank 505 is fixedly connected to the circumferential surface of the chamber 1, thus realizing the decolorization treatment of wastewater. The air supply pipe 504 is fixedly connected to the surface of the air tank 505, the cross plate 507 meshes with the gear ring 503, and a gas circulation device is provided inside the air tank 505. The cross plate 507 and the side of the stirring plate 501 are in contact with each other. The rotating cross plate 507 increases the contact area between wastewater and gas, greatly improving the decolorization effect of the equipment.
[0016] Working principle: When the equipment starts, the output of the external motor drives the main shaft 6 to rotate. The rotation of the main shaft 6 drives the drive plate 302 to rotate. The drive plate 302 rotates and slides forward along the threaded groove. When the drive plate 302 moves into the working range of the dosing mechanism 4, the drive plate 302 drives the spring column 402 to move upward and squeezes the spring connected between the spring column 402 and the dosing baffle 403. At this time, the liquid medicine flows into the mixing tank 3 through the inlet on the tank 1, completing the dosing. When the drive plate 302 moves out of the working range of the dosing mechanism 4... The spring connecting the spring column 402 and the dosing baffle 403 resets, causing the spring column 402 to move downwards to complete the reset, thus completing the intermittent dosing in the mixing tank 3. This reduces the risk of secondary water pollution due to excessive dosage. At this time, the active plate 302 continues to move forward, driving the collecting plate 305 to move. When the collecting plate 305 moves and directly contacts the discharge plate 307, it drives the discharge plate 307 forward and compresses the spring connecting the discharge plate 307 and the fixed plate 308. The discharge plate 307 drives the ratchet 317 to rotate on the circumferential surface of the ratchet shaft 312, compressing the spring connecting the ratchet 317 and the ratchet fixing plate 311. The ratchet 317 fixes the discharge plate 307. At this time, the main shaft 6 continues to rotate, driving the drive plate 302 to slide backward, discharging the waste material between the collection plate 305 and the discharge plate 307 from the mixing box 3. When the drive plate 302 slides backward, driving the collection plate 305 to slide backward into the working range of the rotating plate 314, the spring force of the connecting protrusion 315 is slightly greater than that of the connecting ratchet limiting plate 310. The spring, the collecting plate 305 drives the rotating plate 314 to slide backward, the rotating plate 314 drives the protrusion 315 to move backward, the protrusion 315 drives the ratchet limiting plate 310 to move backward. When the ratchet limiting plate 310 moves away from the constraint range of the ratchet 317, the ratchet 317 loses its constraint effect, the spring connecting the ratchet 317 and the ratchet fixing plate 311 resets, driving the ratchet 317 to rotate on the circumferential surface of the ratchet shaft 312. At the same time, the spring connecting the discharge plate 307 and the fixing plate 308 rebounds, driving the discharge plate 307 to move backward to complete the reset.
[0017] In the decolorization tank 5, when the equipment is working, the main shaft 6 drives the agitator 501 to rotate, the agitator 501 rotates, the cross plate shaft 502 rotates, and the cross plate shaft 502 rotates, which in turn drives the cross plate 507 to rotate. At this time, ozone in the gas tank 505 is added to the decolorization tank 5 through the circulation device set inside the gas tank 505 to achieve decolorization treatment of wastewater. While the cross plate 507 is rotating, the cross plate 507 rotates in the opposite direction to the main shaft 6 on the circumferential surface of the cross plate shaft 502 through the gear ring 503 that meshes with the cross plate 507. Through the bidirectional rotation of the agitator 501 and the cross plate 507, the contact area between wastewater and ozone is increased, resulting in a better decolorization effect.
[0018] Please see Figures 1-9 Based on the above embodiments, in another embodiment of the present invention, the filter box 7 includes a screen cylinder bottom plate 701, a screen cylinder 702, a reciprocating screw 703, a roller 704, a scraper 705, a spiral plate 706, and a screen cylinder top plate 707. The screen cylinder bottom plate 701 is fixedly connected to the bottom of the screen cylinder 702, the screen cylinder 702 is fixedly connected to the circumferential surface of the main shaft 6, the spiral plate 706 is fixedly connected to the inner wall of the screen cylinder 702, the screen cylinder top plate 707 is fixedly connected to the inner wall of the box body 1, the reciprocating screw 703 is rotatably connected to the inner wall of the screen cylinder bottom plate 701, the roller 704 is fixedly connected to the circumferential surface of the reciprocating screw 703, and the scraper 705 is movably connected to the circumferential surface of the reciprocating screw 703. This system effectively filters residual foreign matter in wastewater, further improving wastewater treatment efficiency. The scraper 705 is slidably connected to the outer surface of the screen cylinder 702, the side of the roller 704 contacts the bottom plate 701 of the screen cylinder, the scraper 705 is slidably connected to the inner wall of the housing 1, the bottom plate 701 of the screen cylinder is rotatably connected to the inner wall of the housing 1, the circumferential surface of the active plate 302 contacts the bottom end of the spring column 402, the surface of the housing 1 has a dosing hole, an air inlet, and an air outlet, and the gas in the gas tank 505 contains ozone. The reciprocating scraper 705 allows for timely cleaning of sedimented impurities in the equipment, greatly improving the equipment's working efficiency.
[0019] Working principle: When the main shaft 6 rotates, it drives the screen cylinder 702, which is fixedly connected to the main shaft 6, to rotate. The rotation of the screen cylinder 702 drives the spiral plate 706 to rotate, separating the foreign matter remaining in the sewage from the water using centrifugal force. The foreign matter is then discharged into the screen cylinder 702 along the trajectory of the spiral plate 706. At the same time as the screen cylinder 702 rotates, it drives the screen cylinder bottom plate 701 to rotate. The rotation of the screen cylinder bottom plate 701 drives the reciprocating screw 703 to rotate. The rotation of the reciprocating screw 703 drives the roller 704 to rotate. At the same time, the roller 704 contacts and rotates with the inner wall of the box 1. The roller 704 drives the reciprocating screw 703 to rotate on the inner wall of the screen cylinder bottom plate 701. The rotation of the reciprocating screw 703 drives the scraper 705 to slide on the inner wall of the box 1, scraping off the waste material that has settled from the sewage, preventing excessive accumulation of impurities in the equipment and affecting its normal operation.
[0020] This invention provides a pretreatment device for dyeing and printing wastewater. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.
Claims
1. A device for the pretreatment of printing and dyeing wastewater, comprising a box (1), characterized in that: A bracket (2) is fixedly connected to the circumferential surface of the box (1), a mixing box (3) is provided on the inner wall of the box (1), a decolorizing box (5) is provided on the inner wall of the box (1), a filter box (7) is provided on the rear side of the decolorizing box (5), a dosing mechanism (4) is provided on the circumferential surface of the box (1), and a main shaft (6) is rotatably connected to the inner wall of the box (1). The mixing box (3) includes an active plate (302), a spring sleeve (303) is fixedly connected to the front side of the active plate (302), a stirring rack (304) is slidably connected to the inner wall of the spring sleeve (303), a collecting plate (305) is slidably connected to the side of the stirring rack (304), a top plate (301) is fixedly connected to the inner wall of the box body (1), a bottom plate (306) is fixedly connected to the inner wall of the box body (1), a discharge plate (307) is slidably connected to the inner wall of the bottom plate (306), a fixing plate (308) is connected to the front side of the discharge plate (307) by a spring, and a ratchet limiting plate (310) is slidably connected to the side of the bottom plate (306). A rotating plate shaft (313) is fixedly connected to the side of the positioning plate (310). A rotating plate (314) is rotatably connected to the circumferential surface of the rotating plate shaft (313). A protrusion (315) is slidably connected to the inner wall of the ratchet limiting plate (310) by a spring. A ratchet fixing plate (311) is fixedly connected to the inner wall of the box (1). A ratchet shaft (312) is fixedly connected to the inner wall of the box (1). A ratchet (317) is rotatably connected to the circumferential surface of the ratchet shaft (312). A top plate (301) is fixedly connected to the inner wall of the box (1). A limiting spring rod (309) is slidably connected to the inner wall of the discharge plate (307). A limiting block (316) is fixedly connected to the inner wall of the box (1). The dosing mechanism (4) includes a medicine box (401), and a dosing baffle (403) is fixedly connected to the inner wall of the medicine box (401). A spring column (402) is connected to the bottom of the dosing baffle (403) by a spring.
2. The pretreatment device for dyeing and printing wastewater according to claim 1, characterized in that: The side of the spring sleeve (303) is provided with a sliding groove. The stirring rack (304) is connected to the inner wall of the spring sleeve (303) by a spring. The side of the ratchet (317) away from the ratchet limiting plate (310) is connected to the rear side of the ratchet fixing plate (311) by a spring. The bottom surface of the rotating plate (314) is in contact with the side of the ratchet limiting plate (310). The spring column (402) is in contact with the top of the dosing baffle (403). The active plate (302) is movably connected on the circumferential surface of the main shaft (6).
3. The pretreatment device for dyeing and printing wastewater according to claim 2, characterized in that: The decolorization box (5) includes a stirring plate (501), a cross plate rotating shaft (502), a gear ring (503), an air supply pipe (504), an air tank (505), a partition plate (506), and a cross plate (507). The stirring plate (501) is fixedly connected to the circumferential surface of the main shaft (6). The cross plate rotating shaft (502) is fixedly connected to the inner wall of the stirring plate (501). The cross plate (507) is rotatably connected to the circumferential surface of the cross plate rotating shaft (502). The gear ring (503) is fixedly connected to the inner wall of the box body (1). The air tank (505) is fixedly connected to the circumferential surface of the box body (1). An air supply pipe (504) is fixedly connected to the surface of the air tank (505).
4. A pretreatment device for dyeing and printing wastewater according to claim 3, characterized in that: The cross plate (507) meshes with the gear ring (503), the gas tank (505) is equipped with a gas circulation device, and the sides of the cross plate (507) and the stirring plate (501) are in contact with each other.
5. A pretreatment device for dyeing and printing wastewater according to claim 4, characterized in that: The filter box (7) includes a bottom plate (701), a screen cylinder (702), a reciprocating screw (703), a roller (704), a scraper (705), a spiral plate (706), and a top plate (707). The bottom plate (701) is fixedly connected to the bottom of the screen cylinder (702). The screen cylinder (702) is fixedly connected to the circumferential surface of the main shaft (6). The spiral plate (706) is fixedly connected to the inner wall of the screen cylinder (702). The top plate (707) is fixedly connected to the inner wall of the box body (1). The reciprocating screw (703) is rotatably connected to the inner wall of the bottom plate (701). The roller (704) is fixedly connected to the circumferential surface of the reciprocating screw (703). The scraper (705) is movably connected to the circumferential surface of the reciprocating screw (703).
6. A pretreatment device for dyeing and printing wastewater according to claim 5, characterized in that: The scraper (705) is slidably connected to the outer surface of the screen cylinder (702), the side of the roller (704) is in contact with the bottom plate (701) of the screen cylinder, the scraper (705) is slidably connected to the inner wall of the box (1), and the bottom plate (701) of the screen cylinder is rotatably connected to the inner wall of the box (1).
7. A pretreatment device for dyeing and printing wastewater according to claim 6, characterized in that: The box (1) has a threaded groove at one end near the mixing box (3), the active plate (302) is movably connected to the inner wall of the box (1), the main shaft (6) has a bidirectional threaded groove at one end near the mixing box (3), and the collecting plate (305) is movably connected to the circumferential surface of the main shaft (6).
8. A pretreatment device for dyeing and printing wastewater according to claim 7, characterized in that: The circumferential surface of the active plate (302) is in contact with the bottom end of the spring column (402). The surface of the box (1) is provided with a dosing hole, the surface of the box (1) is provided with an air inlet, the surface of the box (1) is provided with an air outlet, and the gas contained in the gas tank (505) is ozone.