Textile printing and dyeing wastewater treatment equipment and working method

Abstract

The invention relates to the technical field of textile printing and dyeing wastewater treatment, and discloses textile printing and dyeing wastewater treatment equipment and a working method.The textile printing and dyeing wastewater treatment equipment comprises a first treatment pond and a second treatment pond, and a sampling detection mechanism is arranged on the right side in the second treatment pond; the sampling detection mechanism comprises a connecting cylinder pipe, an observation transparent window, a water outlet cylinder, a U-shaped frame II, an air cylinder and a sealing movable plate; and the outer surface of the connecting cylinder pipe is fixedly mounted in the first treatment tank. According to the textile printing and dyeing wastewater treatment equipment and the working method, by using a second fixing plate, a second electric telescopic rod and a bearing stop block, the position of the bearing stop block in the second treatment tank can be lifted, and the effect of sampling, discharging and detecting the textile printing and dyeing wastewater after color removal can be achieved; therefore, the problem of how to carry out sampling detection in the decoloring process is solved, the effect of carrying out adaptive change feeding on the decoloring agent according to the actual decoloring effect can be achieved, and the use of the decoloring agent is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of textile printing and dyeing wastewater treatment, and specifically relates to a textile printing and dyeing wastewater treatment device and a working method thereof. Background Technique

[0002] Textile printing and dyeing is a processing process of endowing textile materials with colors and patterns through processes such as dyeing and printing, covering pre-treatment (desizing, scouring, bleaching), dyeing (dip dyeing, padding), printing (flat screen, rotary screen, digital) and post-treatment (softening, waterproofing), etc. This industry is an important value-added link in the textile industrial chain. When carrying out textile printing and dyeing, a certain amount of wastewater will be generated. The textile printing and dyeing wastewater contains a large amount of impurities, such as fibers, dye particles, etc., and the textile printing and dyeing wastewater has the characteristics of high pollution. Therefore, it is necessary to carry out corresponding treatment operations on the wastewater generated by textile printing and dyeing to avoid affecting the production environment.

[0003] When the existing wastewater treatment equipment treats textile printing and dyeing wastewater, filters and rotating grid filtering components are used to clean the impurities in the water. After that, corresponding color removal treatment is carried out on the filtered textile printing and dyeing wastewater. After color removal, corresponding detection operations are carried out to detect the completion degree of color removal. Finally, the completely decolorized textile printing and dyeing wastewater is discharged completely.

[0004] However, when carrying out color removal treatment on textile printing and dyeing wastewater, a certain amount of color removal agent is added to the interior of the textile printing and dyeing wastewater according to the chromaticity of the textile printing and dyeing wastewater. After that, the completely decolorized textile printing and dyeing wastewater is discharged completely. When adding the color removal agent, a fixed dosage is preset according to the chromaticity of the textile printing and dyeing wastewater. Such dosing of the color removal agent is likely to cause the color removal agent to be excessive or insufficient, and it is not possible to sample and detect during the process of color removal of the textile printing and dyeing wastewater. Therefore, the dosing rate of the color removal agent cannot be adjusted dynamically, which will increase the usage amount of the color removal agent (increase the cost); it is not possible to quickly adjust the process parameters for different batches of wastewater (changes in dye types and concentrations, etc.), thereby avoiding the phenomenon of rework due to non-compliance being found only after complete discharge, which will increase the corresponding treatment time in reality; at the same time, it is also not possible to detect in advance the situation of non-compliance in treatment, thereby avoiding the risk of illegal discharge and reducing pollution problems; and in use, excessive use of the color removal agent may cause unnecessary flocculation or precipitation, increase the sludge volume, and increase the corresponding treatment burden.

[0005] After the decolorization of textile printing and dyeing wastewater is completed, it is necessary to detect its corresponding chromaticity. When performing chromaticity detection, the staff needs to move to the side of the treatment pool for detection operations. However, the volume of the treatment pool is large, and it is necessary to get close to the treatment pool. Therefore, there is a certain danger during the detection. In addition, after the detection, the detection piece needs to be manually cleaned to improve the accuracy of the next detection, which will also increase the corresponding operation complexity during use and reduce the automation operation effect in practice.

[0006] When filtering impurities in textile printing and dyeing wastewater, the impurities in the textile printing and dyeing wastewater are filtered by a filter screen and a rotating grid respectively. While the rotating grid is in use, it cannot synchronously drive the scraper to scrape the impurities blocking the filter screen, resulting in increased consumption of relevant energy and corresponding cost use. After long-term use, the filter screen will be blocked. If not scraped in time, the pores of the filter screen will gradually be blocked, and the filtering speed will slow down. Due to the decrease in the filtering effect of the filter screen, more impurities that should have been intercepted by the filter screen will enter the rotating filter grid, which will increase the amount of impurities that the rotating filter grid needs to handle, increase the processing burden of the rotating grid, reduce the service life of the rotating grid, and is not conducive to the popularization and use of this equipment. Summary of the Invention

[0007] Aiming at the deficiencies of the prior art, the present invention provides a textile printing and dyeing wastewater treatment device and a working method, which have the advantages of performing mid-course detection and treatment during the treatment of textile printing and dyeing wastewater, and can scrape the impurities on the filter screen while filtering through the rotating grid and the filter screen, solving the problems proposed in the background technology.

[0008] The present invention provides the following technical solutions: A textile printing and dyeing wastewater treatment device and a working method, including a first treatment pool and a second treatment pool. A sampling detection mechanism is arranged on the right side inside the second treatment pool. The sampling detection mechanism includes a connecting tube, an observation transparent window, a water outlet tube, a U-shaped frame II, a cylinder and a sealing movable plate. The outer surface of the connecting tube is fixedly installed inside the first treatment pool. The upper and lower ends of the observation transparent window are fixedly installed inside the connecting tube. One end of the water outlet tube is fixedly connected to the inside of the connecting tube. The upper surface of the U-shaped frame II is fixedly connected to the lower surface of the right side of the second treatment pool. The upper surface of the cylinder is fixedly connected to the lower surface of the U-shaped frame II. The bottom of the sealing movable plate is fixedly connected to one end of the output shaft of the cylinder, and the outer surface of the sealing movable plate is slidably connected to the inner wall of the connecting tube. An inlet is opened inside the connecting tube. A waterproof chromaticity sensor is arranged at the top inside the connecting tube, and the position of the waterproof chromaticity sensor is parallel to the position of the water outlet tube.

[0009] Preferably, a stirring and scraping mechanism is arranged inside the first treatment tank. The stirring and scraping mechanism includes a first U-shaped frame, a servo motor, a connecting rod, a first pulley, a transmission belt, a second pulley, a fixed sleeve block, a screw rod, a connecting shaft, a threaded lifting plate, a connecting L-shaped frame, a receiving frame and a scraper. The bottom of the first U-shaped frame is fixedly connected to the upper surface of the first treatment tank. The bottom of the servo motor is fixedly installed on the top of the first U-shaped frame. One end of the connecting rod is fixedly connected to one end of the output shaft of the servo motor. The inner part of the first pulley is fixedly connected to the outer surface of the connecting rod. The inner ring of the transmission belt is in transmission connection with the outer surface of the first pulley. The outer surface of the second pulley is in transmission connection with the inner ring of the transmission belt. The bottom of the fixed sleeve block is fixedly installed at the bottom end of the inner part. The outer surface of the screw rod is rotatably connected to the inner part of the fixed sleeve block. One end of the connecting shaft is fixedly connected to the top end of the screw rod, and the outer surface of the connecting shaft is fixedly installed inside the second pulley. The inner part of the threaded lifting plate is in threaded connection with the outer surface of the screw rod. The bottom of the connecting L-shaped frame is fixedly installed on the top of the threaded lifting plate. The upper surface of the receiving frame is fixedly connected to the lower surface of the connecting L-shaped frame. The upper surface of the scraper is fixedly connected to the lower surface of the receiving frame.

[0010] Preferably, fixing plates two are fixedly installed on the front and back sides of the second treatment tank. An electric telescopic rod two is fixedly installed on the upper surface of the fixing plate two. One end of the electric telescopic rod two is fixedly installed with a receiving and blocking block. Both sides of the receiving and blocking block are in contact with the inner wall of the second treatment tank, and the outer surface of the connecting cylinder tube is slidably connected to the inner part of the receiving and blocking block.

[0011] Preferably, support frames one are fixedly installed around the bottom of the first treatment tank, and support frames two are fixedly installed around the bottom of the second treatment tank.

[0012] Preferably, a water inlet pipe is fixedly connected to the inside of the left side of the first treatment tank, and a water outlet pipe is fixedly installed inside the second treatment tank.

[0013] Preferably, fixing plates one are fixedly installed on the front and back sides of the second treatment tank, and an electric telescopic rod one is fixedly installed on the upper surface of the fixing plate one.

[0014] Preferably, one end of the electric telescopic rod one is fixedly connected to a connecting baffle, and both side surfaces of the connecting baffle are in contact with the inner wall of the second treatment tank.

[0015] Preferably, the outer surface of the threaded lifting plate is slidably connected to the inner wall of the fixed sleeve block. Filter nets are fixedly installed on the front and back sides of the fixed sleeve block, and the bottom of the filter nets is fixedly installed at the bottom end inside the first treatment tank. One side of the surface of the filter net is in contact with the scraper.

[0016] Preferably, a circular groove is formed on the right side of the bottom end of the first treatment tank. The inner wall of the circular groove is rotatably connected with a rotating grid. The bottom end of the rotating grid is rotatably connected with the bottom end inside the second treatment tank, and one end of a connecting rod is fixedly installed inside the rotating grid.

[0017] Preferably, the present invention also provides a working method for treating textile printing and dyeing wastewater, which is characterized by including the following specific steps:

[0018] S1. Through the water inlet pipe arranged on the left side inside the first treatment tank, introduce the textile printing and dyeing wastewater into the first treatment tank. Use the filter screen arranged at the middle position inside the first treatment tank to perform a primary filtration operation on the incoming textile printing and dyeing wastewater. Start the servo motor fixed on the upper surface of the U-shaped frame 1. The servo motor is powered by an external power source, and drives the connecting rod fixedly installed at one end of its output shaft to rotate. The outer surface of the rotating grid fixedly connected to one end of the connecting rod rotates on the inner wall of the circular groove formed inside the first treatment tank and the bottom end inside the second treatment tank, and performs a secondary filtration on the wastewater passing through the filter screen. Moreover, the rotating mode continuously updates the filtration surface to avoid the accumulation of impurities affecting the filtration effect.

[0019] S2. The pulley 1 fixed on the outer surface of the connecting rod drives the transmission belt to rotate. The pulley 2 connected to the inner ring of the transmission belt drives the connecting shaft fixedly installed inside it to rotate. The screw rod fixedly installed at the lower end of the connecting shaft rotates accordingly, causing the threaded lifting plate to lift inside the fixed sleeve block. The connecting L-shaped frame and the receiving frame fixed on the upper surface of the threaded lifting plate drive the scraper to perform scraping operations on the surface and inside of the filter screen. The contact surface between the scraper and the filter screen is provided with scraping teeth matching the pores of the filter screen to ensure the smoothness of the filter screen filtration. By the forward and reverse rotation of the servo motor, drive the rotating grid to rotate in different directions to improve the filtration effect, and drive the scraper to scrape repeatedly.

[0020] S3. The filtered wastewater is concentrated on the left side of the second treatment tank. The electric telescopic rod fixed on the upper surface of the fixed plate drives the connecting baffle to rise on the inner wall of the second treatment tank, so that the wastewater enters the middle side of the second treatment tank. According to the color of different types of textile printing and dyeing wastewater, the corresponding decolorizer is added to perform the decolorization operation. After the decolorization is completed, the receiving block fixed at one end of the electric telescopic rod is raised through an external power source, so that part of the decolorized wastewater enters the connecting tube through the pores of the rising receiving block and the water inlet opened inside the connecting tube, and then the receiving block is lowered to close the water inlet channel. The cylinder arranged at the bottom of the second U-shaped frame is used to drive the sealing movable plate fixed at one end of the cylinder output shaft to move upward inside the connecting tube, and the wastewater to be detected is moved to the observation transparent window position arranged inside the connecting tube to observe the sampled wastewater, and the sampled wastewater is pushed up to contact the waterproof colorimetric sensor so as to perform a detection operation on the wastewater, and the position of the waterproof colorimetric sensor is parallel to the position of the water outlet cylinder, and after the detection, the sealing movable plate can be pushed to drive the detected wastewater to be discharged into the second treatment tank for recycling and treatment operations, and after using the waterproof colorimetric sensor, clean water can be discharged through the groove above the waterproof colorimetric sensor to clean the connecting tube and the waterproof colorimetric sensor, and then the sealing movable plate can be pushed to discharge the cleaned water into the second treatment tank for treatment operations to avoid external pollution.

[0021] S4. After the inspection and observation are qualified, the water inside the connecting tube is moved upward by the power of the cylinder to the position above the transparent observation window set inside the connecting tube, and the qualified wastewater is discharged back to the second treatment tank through the water outlet tube set at the top of the connecting tube, and finally discharged from the second treatment tank through the water outlet pipes set on both sides of the second treatment tank to complete the wastewater treatment. Before discharge, the water outlet pipes on both sides need to be blocked. If the sampling inspection is unqualified, according to the degree of wastewater treatment in the sampling inspection, the corresponding amount of color remover is added again in the second treatment tank, and the tested wastewater is discharged into the second treatment tank again for color removal operation, until the color removal is completed and then discharged according to the above qualified discharge process.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. For this textile printing and dyeing wastewater treatment equipment and its working method, by using the second fixing plate, the second electric telescopic rod, and the receiving block, the position of the receiving block inside the second treatment tank can be lifted or lowered, achieving the effect of sampling and discharging the decolorized textile printing and dyeing wastewater for detection. By using the second U-shaped frame, the cylinder, and the sealed movable plate, the position of the sampled textile printing and dyeing wastewater entering through the water inlet inside the connecting tube can be lifted, achieving the effect of convenient detection. By using the connecting tube, the observation transparent window, and the water outlet tube, the color of the textile printing and dyeing wastewater can be observed through the observation transparent window. And by using the waterproof chromaticity sensor, after the sampled wastewater is pushed up and contacts the waterproof chromaticity sensor, the wastewater can be detected. Also, since the position of the waterproof chromaticity sensor is parallel to the position of the water outlet tube, after the detection, the sealed movable plate can be pushed to drive the detected wastewater to be discharged and recycled, achieving the effect of convenient detection, improving the automatic detection effect in practice, enhancing the safety of detection in practice, and thus solving the problem of how to conduct sampling detection during the decolorization process. It can achieve the effect of adaptively changing the dosage of the decolorizing agent according to the actual decolorization effect, thereby reducing the use of the decolorizing agent, lowering the usage cost of the decolorizing agent, avoiding the risk of illegal discharge, reducing pollution, and thus also reducing the burden of reprocessing operations.

[0024] 2. For this textile printing and dyeing wastewater treatment equipment and its working method, by using the circular groove, the first U-shaped frame, the servo motor, the connecting rod, and the rotating grid, the rotating grid can be driven to rotate inside the second treatment tank, achieving the effect of reprocessing the wastewater after primary treatment and filtration, intercepting and removing finer suspended particles, fiber filaments, etc., realizing more refined solid-liquid separation, and improving the water quality of the effluent. By using the first pulley, the transmission belt, the second pulley, the fixed sleeve block, the screw rod, the connecting shaft, and the threaded lifting plate, when the first U-shaped frame drives the connecting shaft to rotate, the screw rod can be driven to rotate, thereby lifting or lowering the position of the threaded lifting plate on the inner wall of the fixed sleeve block, achieving the effect of combined use and reducing energy consumption. By using the connecting L-shaped frame, the receiving frame, the scraper, and the filter screen, when the threaded lifting plate moves up and down, due to the connection of the receiving frame and the connecting L-shaped frame, the scraper can move up and down synchronously with the threaded lifting plate on the left and right sides of the filter screen, and the scraper is provided with scraping teeth on the contact surface with the filter screen (the tooth pitch matches the pore size of the filter screen), which can enter the pores of the filter screen, achieving the effect of scraping impurities on the surface and in the pores of the filter screen. Thus, the problem of how to drive the scraper to clean the impurities in the filter screen while using the rotating grid is solved, which can achieve the effect of avoiding impurity blockage from affecting wastewater treatment, reducing the damage to the rotating grid, reducing the treatment burden on the rotating grid, fully automatically performing the filtration and cleaning operation, reducing the consumption of a certain amount of energy, further increasing the service life of the structure in the equipment, and facilitating the popularization and use of this equipment in reality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention;

[0026] Figure 2 For the present invention Figure 1 Schematic diagram of the left view structure;

[0027] Figure 3 For the present invention Figure 1 A schematic diagram of a top view structure;

[0028] Figure 4 For the present invention Figure 1 Schematic diagram of the local structure;

[0029] Figure 5 For the present invention Figure 4 Schematic diagram of the sampling and testing organization structure;

[0030] Figure 6 For the present invention Figure 1 Schematic diagram of the local structure;

[0031] Figure 7 For the present invention Figure 1 Schematic diagram of some structures;

[0032] Figure 8 For the present invention Figure 7 A schematic diagram of the structure enlargement at point A;

[0033] Figure 9 For the present invention Figure 5 Schematic diagram of the internal structure of the connecting bobbin.

[0034] In the figure: 1, first treatment tank; 2, second treatment tank; 3, support frame 1; 4, water inlet pipe; 5, support frame 2; 6, water outlet pipe; 7, fixed plate 1; 8, electric telescopic rod 1; 9, connecting baffle; 10, circular groove; 11, U-shaped frame 1; 12, servo motor; 13, connecting rod; 14, rotating grid; 15, pulley 1; 16, transmission belt; 17, pulley 2; 18, fixed sleeve; 19, screw; 20, connecting Axis; 21. Threaded lifting plate; 22. Connecting L-shaped frame; 23. Receiving frame; 24. Scraper; 25. Filter; 26. Fixed plate 2; 27. Electric telescopic rod 2; 28. Receiving block; 29. Connecting bobbin; 30. Observation transparent window; 31. Water outlet cylinder; 32. U-shaped frame 2; 33. Cylinder; 34. Sealing movable plate; 35. Water inlet; 36. Sampling detection mechanism; 37. Stirring and scraping mechanism; 38. Waterproof colorimetric sensor. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figure 4 、 Figure 5 and Figure 9 , a textile printing and dyeing wastewater treatment device and a working method, including a first treatment tank 1 and a second treatment tank 2. A sampling and detection mechanism 36 is arranged on the right side inside the second treatment tank 2. The sampling and detection mechanism 36 includes a connecting tube 29, an observation transparent window 30, a water outlet tube 31, a U-shaped bracket II 32, a cylinder 33 and a sealing movable plate 34. The outer surface of the connecting tube 29 is fixedly installed inside the first treatment tank 1. Both the upper and lower ends of the observation transparent window 30 are fixedly installed inside the connecting tube 29. One end of the outer surface of the water outlet tube 31 is fixedly connected to the inside of the connecting tube 29. The upper surface of the U-shaped bracket II 32 is fixedly connected to the lower surface on the right side of the second treatment tank 2. The upper surface of the cylinder 33 is fixedly connected to the lower surface of the U-shaped bracket II 32. The bottom of the sealing movable plate 34 is fixedly connected to one end of the output shaft of the cylinder 33, and the outer surface of the sealing movable plate 34 is slidably connected to the inner wall of the connecting tube 29. An inlet 35 is opened inside the connecting tube 29. A waterproof chromaticity sensor 38 is arranged at the top inside the connecting tube 29, and the position of the waterproof chromaticity sensor 38 is parallel to the position of the water outlet tube 31. Fixing plates II 26 are fixedly installed on the front and back sides of the second treatment tank 2. An electric telescopic rod II 27 is fixedly installed on the upper surface of the fixing plate II 26. One end of the electric telescopic rod II 27 is fixedly installed with a receiving block 28. Both sides of the receiving block 28 are in contact with the inner wall of the second treatment tank 2, and the inside of the receiving block 28 is slidably connected to the outer surface of the connecting tube 29.

[0037] Specifically, through the combined use of the second electric telescopic rod 27, the receiving stop block 28 and the water inlet 35 of the connecting tube 29, the second electric telescopic rod 27 provides power for the lifting of the receiving stop block 28. The receiving stop block 28 slides in a fitting manner on the inner wall of the second treatment tank 2, and its interior is slidably connected to the outer surface of the connecting tube 29, achieving the effect of controlling the opening and closing of the water inlet 35 of the connecting tube 29. It can be flexibly adjusted according to needs, enabling the treated wastewater to enter the connecting tube 29 for sampling detection at an appropriate time. Through the combined use of the connecting tube 29, the observation transparent window 30 and the sealing movable plate 34, the connecting tube 29 provides space for wastewater sampling and detection. The observation transparent window 30 is fixedly installed inside it, facilitating direct observation of the wastewater situation. The air cylinder 33 drives the sealing movable plate 34 to slide on the inner wall of the connecting tube 29, which can adjust the water level height inside the connecting tube 29, achieving the effect of directly observing the wastewater entering the connecting tube 29 and facilitating subsequent detection operations by adjusting the water level. Through the combined use of the connecting tube 29, the water outlet tube 31 and the sealing movable plate 34, after the detection is completed, the air cylinder 33 drives the sealing movable plate 34 to move, discharging the qualified wastewater in the connecting tube 29 back to the second treatment tank 2 through the water outlet tube 31, realizing the operations of treating qualified and unqualified detections. Through the combined use of the second U-shaped frame 32, the air cylinder 33 and the sealing movable plate 34, stable power is provided for the sliding of the sealing movable plate 34 inside the connecting tube 29, ensuring the accurate and reliable progress of sampling detection and wastewater discharge operations. Through the use of the waterproof chromaticity sensor 38, after the sampled wastewater is pushed up, contacting the waterproof chromaticity sensor 38 can perform detection operations on the wastewater. Moreover, the position of the waterproof chromaticity sensor 38 is parallel to the position of the water outlet tube 31. After the detection is completed, the sealing movable plate 34 can be pushed to drive the detected wastewater to be discharged and recycled. After using the waterproof chromaticity sensor 38, clean water can be discharged through the through groove above the waterproof chromaticity sensor 38 to clean the connecting tube 29 and the waterproof chromaticity sensor 38, and then by pushing the sealing movable plate 34, the cleaned water can be discharged into the second treatment tank 2 for treatment operations, avoiding external pollution, etc.

[0038] Please refer to Figure 6 、 Figure 7 and Figure 8, a stirring and scraping mechanism 37 is arranged inside the first treatment tank 1. The stirring and scraping mechanism 37 includes a first U-shaped frame 11, a servo motor 12, a connecting rod 13, a first pulley 15, a transmission belt 16, a second pulley 17, a fixed sleeve block 18, a screw rod 19, a connecting shaft 20, a threaded lifting plate 21, a connecting L-shaped frame 22, a receiving frame 23 and a scraper 24. The bottom of the first U-shaped frame 11 is fixedly connected to the upper surface of the first treatment tank 1. The bottom of the servo motor 12 is fixedly installed on the top of the first U-shaped frame 11. One end of the connecting rod 13 is fixedly connected to one end of the output shaft of the servo motor 12. The inner part of the first pulley 15 is fixedly connected to the outer surface of the connecting rod 13. The inner ring of the transmission belt 16 is in transmission connection with the outer surface of the first pulley 15. The outer surface of the second pulley 17 is in transmission connection with the inner ring of the transmission belt 16. The bottom of the fixed sleeve block 18 is fixedly installed at the inner bottom end. The outer surface of the screw rod 19 is rotatably connected to the inside of the fixed sleeve block 18. One end of the connecting shaft 20 is fixedly connected to the top of the screw rod 19, and the outer surface of the connecting shaft 20 is fixedly installed inside the second pulley 17. The inner part of the threaded lifting plate 21 is in threaded connection with the outer surface of the screw rod 19. The bottom of the connecting L-shaped frame 22 is fixedly installed on the top of the threaded lifting plate 21. The upper surface of the receiving frame 23 is fixedly connected to the lower surface of the connecting L-shaped frame 22. The upper surface of the scraper 24 is fixedly connected to the lower surface of the receiving frame 23. The outer surface of the threaded lifting plate 21 is slidably connected to the inner wall of the fixed sleeve block 18. Filter meshes 25 are fixedly installed on both the front and back sides of the fixed sleeve block 18, and the bottom of the filter meshes 25 is fixedly installed at the inner bottom end of the first treatment tank 1. The surface of the filter meshes 25 is in contact with one side of the scraper 24. A circular groove 10 is opened on the right side of the bottom end of the first treatment tank 1. A rotating grid 14 is rotatably connected to the inner wall of the circular groove 10. The bottom end of the rotating grid 14 is rotatably connected to the inner bottom end of the second treatment tank 2, and the inside of the rotating grid 14 is fixedly installed with one end of the connecting rod 13.

[0039] Specifically, through the combined use of the servo motor 12, the connecting rod 13, and the rotating grid 14, the servo motor 12 provides power for the rotation of the connecting rod 13. The connecting rod 13 drives the rotating grid 14 to rotate on the inner wall of the circular groove 10 opened inside the first treatment tank 1 and the bottom end inside the second treatment tank 2, achieving the effect of re-filtering the textile printing and dyeing wastewater entering the first treatment tank 1. Moreover, the rotation method can continuously update the filtering surface, prevent the filter holes from being blocked, and improve the filtering efficiency. Through the combined use of the servo motor 12, the connecting rod 13, the first pulley 15, the transmission belt 16, the second pulley 17, the connecting shaft 20, and the screw rod 19, the servo motor 12 drives the connecting rod 13 to rotate. The first pulley 15 on the connecting rod 13 drives the second pulley 17 to rotate through the transmission belt 16. The second pulley 17 drives the screw rod 19 to rotate inside the fixed sleeve block 18 through the connecting shaft 20, achieving the effect of transmitting the power of the servo motor 12 to the screw rod 19 and realizing the conversion and transmission of power, providing power for the subsequent lifting of the threaded lifting plate 21. Through the combined use of the screw rod 19, the threaded lifting plate 21, the connecting L-shaped frame 22, the receiving frame 23, and the scraper 24, when the screw rod 19 rotates, the threaded lifting plate 21 threadedly connected to the screw rod 19 slides on the inner wall of the fixed sleeve block 18. The threaded lifting plate 21 drives the scraper 24 to lift through the connecting L-shaped frame 22 and the receiving frame 23, achieving the effect of continuously scraping and cleaning the filter screen 25 fixedly installed on the front and back sides of the fixed sleeve block 18, preventing the filter screen 25 from being blocked, and ensuring the filtering effect of the filter screen 25.

[0040] Please refer to Figure 1 , Figure 2 and Figure 3 , support frames one 3 are fixedly installed around the bottom of the first treatment tank 1, support frames two 5 are fixedly installed around the bottom of the second treatment tank 2, a water inlet pipe 4 is fixedly connected to the inside of the left side of the first treatment tank 1, a water outlet pipe 6 is fixedly installed inside the second treatment tank 2, fixing plates one 7 are fixedly installed on the front and back sides of the second treatment tank 2, an electric telescopic rod one 8 is fixedly installed on the upper surface of the fixing plate one 7, and one end of the electric telescopic rod one 8 is fixedly connected to a connecting baffle 9, and both side surfaces of the connecting baffle 9 are in contact with the inner wall of the second treatment tank 2.

[0041] Specifically, through the combined use of the first support frame 3 and the first treatment tank 1, the effect of ensuring the structural stability of the first treatment tank 1 and ensuring the normal progress of the wastewater treatment work is achieved. Through the combined use of the second support frame 5 and the second treatment tank 2, the effect of ensuring the structural stability of the second treatment tank 2 and ensuring the smooth progress of the wastewater treatment process is achieved. The water inlet pipe 4 is fixedly connected to the inside of the left side of the first treatment tank 1, providing a channel for the textile printing and dyeing wastewater to enter the first treatment tank 1. The water outlet pipe 6 is fixedly installed inside the second treatment tank 2, used to discharge the wastewater treated by the second treatment tank 2 from the equipment. The first fixing plate 7 provides fixed support for the first electric telescopic rod 8. The first electric telescopic rod 8 can drive the connecting baffle 9 to fit and slide on the inner wall of the second treatment tank 2, achieving the effect of flexibly controlling the wastewater discharge in the second treatment tank 2. The position of the connecting baffle 9 can be adjusted according to actual needs to achieve the quantitative discharge or temporary interception of the wastewater.

[0042] The present invention also proposes a method for treating textile printing and dyeing wastewater, including the following specific steps:

[0043] S1. Through the water inlet pipe 4 arranged on the left side inside the first treatment tank 1, introduce the textile printing and dyeing wastewater into the first treatment tank 1. Utilize the filter screen 25 arranged in the middle position inside the first treatment tank 1 to perform a primary filtration operation on the incoming textile printing and dyeing wastewater. Start the servo motor 12 fixed on the upper surface of the first U-shaped frame 11. The servo motor 12 is powered by an external power source, driving the connecting rod 13 fixedly installed at one end of its output shaft to rotate. The outer surface of the rotating grid 14 fixedly connected to one end of the connecting rod 13 rotates on the inner wall of the circular groove 10 opened inside the first treatment tank 1 and the bottom end inside the second treatment tank 2, performing a secondary filtration on the wastewater passing through the filter screen 25, and continuously updating the filtration surface in a rotating manner to avoid the accumulation of impurities affecting the filtration effect.

[0044] S2. The first pulley 15 fixed on the outer surface of the connecting rod 13 drives the transmission belt 16 to rotate. The second pulley 17 drivingly connected to the inner ring of the transmission belt 16 drives the connecting shaft 20 fixedly installed inside it to rotate. The screw rod 19 fixedly installed at the lower end of the connecting shaft 20 rotates accordingly, causing the threaded lifting plate 21 to lift and lower inside the fixed sleeve block 18. The connecting L-shaped frame 22 and the receiving frame 23 fixed on the upper surface of the threaded lifting plate 21 drive the scraper 24 to perform scraping operations on the surface and inside of the filter screen 25. The contact surface between the scraper 24 and the filter screen 25 is provided with scraping teeth matching the pores of the filter screen 25 to ensure the smoothness of the filtration of the filter screen 25. By the forward and reverse rotation of the servo motor 12, drive the rotating grid 14 to rotate in different directions to improve the filtration effect, and drive the scraper 24 to scrape repeatedly.

[0045] S3. The filtered wastewater is concentrated on the left side inside the second treatment tank 2. The electric telescopic rod 1, fixed on the upper surface of the fixed plate 1 7, drives the connecting baffle 9 to rise on the inner wall of the second treatment tank 2, allowing the wastewater to enter the middle side inside the second treatment tank 2. According to the colors of different types of textile printing and dyeing wastewater, corresponding color removal agents are added for color removal operations. After color removal is completed, the position of the receiving block 28, fixed at one end of the electric telescopic rod 2 27, is raised by an external power source, enabling some of the color-removed wastewater to enter the inside of the connecting tube 29 through the pores formed by the rising of the receiving block 28 and the water inlet 35 opened inside the connecting tube 29. Then, the receiving block 28 is lowered to close the water inlet channel. The air cylinder 33, arranged at the bottom of the U-shaped frame 2 32, drives the sealing movable plate 34, fixed at one end of the output shaft of the air cylinder 33, to move upward inside the connecting tube 29, moving the wastewater to be detected to the position of the observation transparent window 30 arranged inside the connecting tube 29 for observing the sampled wastewater. After the sampled wastewater is pushed upward and contacts the waterproof chromaticity sensor 38, the wastewater can be detected. The position of the waterproof chromaticity sensor 38 is parallel to the position of the water outlet cylinder 31. After detection, the sealing movable plate 34 can be pushed to drive the detected wastewater to be discharged into the inside of the second treatment tank 2 for recycling treatment operations. After using the waterproof chromaticity sensor 38, clean water can be discharged through the through groove above the waterproof chromaticity sensor 38 to clean the connecting tube 29 and the waterproof chromaticity sensor 38. Then, by pushing the sealing movable plate 34, the cleaned water can be discharged into the inside of the second treatment tank 2 for treatment operations, avoiding external pollution and so on.

[0046] S4. After passing the detection and observation, the water inside the connecting tube 29 is lifted upward by the power of the air cylinder 33 to move it above the position of the observation transparent window 30 arranged inside the connecting tube 29. The qualified wastewater is discharged back into the inside of the second treatment tank 2 through the water outlet cylinder 31 arranged at the top of the connecting tube 29. Finally, it is discharged from the inside of the second treatment tank 2 through the water outlet pipes 6 arranged on both sides inside the second treatment tank 2, completing the wastewater treatment. Before discharging, the two water outlet pipes 6 need to be blocked. If the sampled detection is unqualified, according to the treatment degree of the sampled wastewater, the corresponding amount of color removal agent is added again inside the second treatment tank 2, and the wastewater to be detected is discharged again into the inside of the second treatment tank 2 for color removal operations until the color removal is completed and then discharged according to the above-mentioned qualified discharge process.

[0047] Working principle: When in use, through the function of the water inlet pipe 4 arranged on the left side inside the first treatment tank 1, textile printing and dyeing wastewater can enter the inside of the first treatment tank 1. After the textile printing and dyeing wastewater enters the inside of the first treatment tank 1, first through the function of the filter screen 25 arranged at the middle position inside the first treatment tank 1, the textile printing and dyeing wastewater entering the inside of the first treatment tank 1 can be initially filtered. When filtering the textile printing and dyeing wastewater, through the function of the servo motor 12 fixed on the upper surface of the U-shaped frame 11, the servo motor 12 is electrically connected to an external power source to provide power, thereby driving the rotation of the connecting rod 13 fixedly installed at one end of the output shaft of the servo motor 12. When the connecting rod 13 rotates, the outer surface of the rotary grid 14 fixedly connected to one end of the connecting rod 13 can rotate on the inner wall of the circular groove 10 opened inside the first treatment tank 1, and the rotary grid 14 can rotate at the bottom end inside the second treatment tank 2. The textile printing and dyeing wastewater that can pass through the filter screen 25 can be filtered again through the rotary grid 14, and the rotating method can continuously update the filtering surface to prevent impurities from accumulating on the rotary grid 14 and affecting the filtering effect. While the rotary grid 14 is rotating and filtering, through the function of the pulley 15 fixedly installed on the outer surface of the connecting rod 13, the rotation of the transmission belt 16 drivingly connected to the outer surface of the pulley 15 is driven, so that the rotation of the connecting shaft 20 fixedly installed inside the pulley 2 can be driven by the inner ring of the transmission belt 16 drivingly connected to the pulley 2. When the connecting shaft 20 rotates, the rotation of the screw 19 fixedly installed at the lower end of the connecting shaft 20 is driven, so that when the screw 19 rotates, the threaded lifting plate 21 can be lifted inside the fixed sleeve block 18. When the position of the threaded lifting plate 21 is lifted inside the fixed sleeve block 18, the L-shaped frame 22 and the receiving frame 23 fixedly installed on the upper surface of the threaded lifting plate 21 synchronously can drive the scraper 24 to perform scraping operations on the surface and inside of the filter screen 25. The scraping teeth arranged on the contact surface between the scraper 24 and the filter screen 25 have a tooth pitch matching the pores of the filter screen 25, so as to ensure the smoothness of filtration while the filter screen 25 is filtering. Then, through the forward and reverse rotation of the servo motor 12, the rotary grid 14 is driven to rotate in different directions to improve the corresponding filtering effect, and the scraper 24 can be driven to repeatedly scrape on the surface and inside of the filter screen 25. After that, the filtered wastewater can be concentrated on the left side inside the second treatment tank 2, and then through the function of the electric telescopic rod 8 fixedly installed on the upper surface of the fixing plate 1 7, and the electric telescopic rod 8 is electrically connected to an external power source, the connection baffle 9 is driven to rise on the inner wall of the second treatment tank 2, so that the filtered textile printing and dyeing wastewater enters the middle side inside the second treatment tank 2. According to the colors of different types of textile printing and dyeing wastewater, corresponding decolorizing agents are added to the filtered textile printing and dyeing wastewater for decolorizing operation. After the decolorizing is completed, through the electrical connection function of an external power source, the position of the receiving block 28 fixedly installed at one end of the electric telescopic rod 27 can rise, so that part of the decolorized wastewater can pass through the pores where the receiving block 28 rises.And the water enters the inside of the connecting bobbin tube 29 through the water inlet 35 opened inside the connecting bobbin tube 29. Then, the position of the receiving block 28 is lowered to close the water inlet passage. After that, through the power action of the cylinder 33 arranged at the bottom of the U-shaped bracket II 32, and the power action of the cylinder 33 connected to the external air source, the sealing movable plate 34 fixedly connected to one end of the output shaft of the cylinder 33 is driven to move upward inside the connecting bobbin tube 29, so that the textile printing and dyeing wastewater to be detected entering the inside of the connecting bobbin tube 29 can be moved upward to the position of the observation transparent window 30 arranged inside the connecting bobbin tube 29 for preliminary observation and understanding of the sampled wastewater. And through the use of the waterproof chromaticity sensor 38, after the sampled wastewater is pushed upward, the wastewater can contact the waterproof chromaticity sensor 38 for detection operation. And the position of the waterproof chromaticity sensor 38 is parallel to the position of the water outlet tube 31. After the detection is completed, through the power action of the cylinder 33, the sealing movable plate 34 is driven to discharge the detected wastewater back into the treatment tank 2. And after using the waterproof chromaticity sensor 38, clean water can be discharged through the through groove above the waterproof chromaticity sensor 38 to clean the connecting bobbin tube 29 and the waterproof chromaticity sensor 38. Then, through the power action of the cylinder 33 again, the sealing movable plate 34 is driven to discharge the cleaned water into the inside of the second treatment tank 2 for treatment operation to avoid external pollution, etc. Finally, through the function of the water outlet pipes 6 arranged on both sides inside the second treatment tank 2, the inside of the second treatment tank 2 is discharged, and the wastewater treatment is completed. Before the discharge, the two water outlet pipes 6 are blocked. When the sampling detection is unqualified, according to the degree of treatment of the sampled wastewater, the corresponding amount of decolorant can be added into the inside of the second treatment tank 2 again, and then the detected wastewater is discharged into the inside of the second treatment tank 2 again for decoloring operation, so that the wastewater can be decolored. Then, it is discharged through the water outlet pipes 6 arranged on both sides inside the second treatment tank 2.

[0048] It should be noted that the above-mentioned electrical components and electrical equipment all use external power sources. The circuits, electronic components and modules involved in the present invention are all prior arts, which can be fully realized by those skilled in the art without further elaboration. The content protected by the present invention does not involve the improvement of the internal structure and method either. In addition, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A textile printing and dyeing wastewater treatment device and a working method, characterized in that: It includes a first treatment tank (1) and a second treatment tank (2). A sampling and detection mechanism (36) is arranged on the right side inside the second treatment tank (2). The sampling and detection mechanism (36) includes a connecting cylinder tube (29), an observation transparent window (30), a water outlet cylinder (31), a U-shaped frame II (32), a cylinder (33) and a sealing movable plate (34). The outer surface of the connecting cylinder tube (29) is fixedly installed inside the first treatment tank (1). Both the upper and lower ends of the observation transparent window (30) are fixedly installed inside the connecting cylinder tube (29). The outer surface of one end of the water outlet cylinder (31) is fixedly connected to the inside of the connecting cylinder tube (29). The upper surface of the U-shaped frame II (32) is fixedly connected to the right side of the lower surface of the second treatment tank (2). The upper surface of the cylinder (33) is fixedly connected to the lower surface of the U-shaped frame II (32). The bottom of the sealing movable plate (34) is fixedly connected to one end of the output shaft of the cylinder (33), and the outer surface of the sealing movable plate (34) is slidably connected to the inner wall of the connecting cylinder tube (29). An inlet (35) is provided inside the connecting cylinder tube (29). A waterproof chromaticity sensor (38) is arranged at the top inside the connecting cylinder tube (29), and the position of the waterproof chromaticity sensor (38) is parallel to the position of the water outlet cylinder (31).

2. A textile printing and dyeing wastewater treatment device and working method according to claim 1, characterized in that: A stirring and scraping mechanism (37) is arranged inside the first treatment tank (1). The stirring and scraping mechanism (37) includes a U-shaped frame I (11), a servo motor (12), a connecting rod (13), a pulley I (15), a transmission belt (16), a pulley II (17), a fixed sleeve block (18), a screw rod (19), a connecting shaft (20), a threaded lifting plate (21), a connecting L-shaped frame (22), a receiving frame (23) and a scraper (24). The bottom of the U-shaped frame I (11) is fixedly connected to the upper surface of the first treatment tank (1). The bottom of the servo motor (12) is fixedly installed on the top of the U-shaped frame I (11). One end of the connecting rod (13) is fixedly connected to one end of the output shaft of the servo motor (12). The inside of the pulley I (15) is fixedly connected to the outer surface of the connecting rod (13). The inner ring of the transmission belt (16) is drivingly connected to the outer surface of the pulley I (15). The outer surface of the pulley II (17) is drivingly connected to the inner ring of the transmission belt (16). The bottom of the fixed sleeve block (18) is fixedly installed at the bottom inside. The outer surface of the screw rod (19) is rotatably connected to the inside of the fixed sleeve block (18). One end of the connecting shaft (20) is fixedly connected to the top of the screw rod (19), and the outer surface of the connecting shaft (20) is fixedly installed inside the pulley II (17). The inside of the threaded lifting plate (21) is threadedly connected to the outer surface of the screw rod (19). The bottom of the connecting L-shaped frame (22) is fixedly connected to the top of the threaded lifting plate (21). The upper surface of the receiving frame (23) is fixedly connected to the lower surface of the connecting L-shaped frame (22). The upper surface of the scraper (24) is fixedly connected to the lower surface of the receiving frame (23).

3. A textile printing and dyeing wastewater treatment device and working method according to claim 1, characterized in that: On both the front and back sides of the second treatment tank (2), fixing plates II (26) are fixedly installed. On the upper surface of the fixing plate II (26), an electric telescopic rod II (27) is fixedly installed. At one end of the electric telescopic rod II (27), a receiving block (28) is fixedly installed. Both sides of the receiving block (28) are in contact with the inner wall of the second treatment tank (2), and the outer surface of the connecting cylinder tube (29) is slidably connected to the inside of the receiving block (28).

4. A textile printing and dyeing wastewater treatment device and working method according to claim 1, characterized in that: On the four sides around the bottom of the first treatment tank (1), support frames I (3) are fixedly installed. On the four sides around the bottom of the second treatment tank (2), support frames II (5) are fixedly installed.

5. A textile printing and dyeing wastewater treatment device and working method according to claim 1, characterized in that: An inlet pipe (4) is fixedly connected to the inside of the left side of the first treatment tank (1), and an outlet pipe (6) is fixedly installed inside the second treatment tank (2).

6. A textile printing and dyeing wastewater treatment device and working method according to claim 1, characterized in that: On both the front and back sides of the second treatment tank (2), fixing plates I (7) are fixedly installed. On the upper surface of the fixing plate I (7), an electric telescopic rod I (8) is fixedly installed.

7. A textile printing and dyeing wastewater treatment device and working method according to claim 6, characterized in that: One end of the electric telescopic rod I (8) is fixedly connected to a connecting baffle (9), and both side surfaces of the connecting baffle (9) are in contact with the inner wall of the second treatment tank (2).

8. A textile printing and dyeing wastewater treatment device and working method according to claim 2, characterized in that: The outer surface of the threaded lifting plate (21) is slidably connected to the inner wall of the fixed sleeve block (18). On both the front and back sides of the fixed sleeve block (18), filter meshes (25) are fixedly installed, and the bottom of the filter mesh (25) is fixedly installed at the bottom end inside the first treatment tank (1). One side of the filter mesh (25) is in contact with the surface of the scraping plate (24).

9. A textile printing and dyeing wastewater treatment device and working method according to claim 1, characterized in that: A circular groove (10) is opened on the right side of the bottom end of the first treatment tank (1). The inner wall of the circular groove (10) is rotatably connected to a rotating grid (14). The bottom end of the rotating grid (14) is rotatably connected to the bottom end inside the second treatment tank (2), and one end of a connecting rod (13) is fixedly installed inside the rotating grid (14).

10. A textile printing and dyeing wastewater treatment method proposed by the present invention for the textile printing and dyeing wastewater treatment equipment according to any one of claims 1-9, characterized in that, It includes the following specific steps: S1. Through the inlet pipe (4) arranged on the left side inside the first treatment tank (1), textile printing and dyeing wastewater is introduced into the first treatment tank (1). Using the filter mesh (25) arranged in the middle inside the first treatment tank (1), a primary filtration operation is carried out on the incoming textile printing and dyeing wastewater. Start the servo motor (12) fixed on the upper surface of the U-shaped frame I (11). The servo motor (12) is powered by an external power source and drives the connecting rod (13) fixedly installed at one end of its output shaft to rotate. The outer surface of the rotating grid (14) fixedly connected to one end of the connecting rod (13) rotates on the inner wall of the circular groove (10) opened inside the first treatment tank (1) and the bottom end inside the second treatment tank (2), and the wastewater passing through the filter mesh (25) is filtered again, and the rotation method continuously updates the filtration surface to avoid the accumulation of impurities affecting the filtration effect. S2. The pulley one (15) fixed to the outer surface of the connecting rod (13) drives the transmission belt (16) to rotate. The pulley two (17) connected to the inner ring of the transmission belt (16) drives the connecting shaft (20) fixedly installed inside it to rotate. The screw rod (19) fixedly installed at the lower end of the connecting shaft (20) rotates accordingly, causing the threaded lifting plate (21) to lift and lower on the inner wall of the fixed sleeve block (18). The connecting L-shaped frame (22) and the receiving frame (23) fixed to the upper surface of the threaded lifting plate (21) drive the scraper (24) to perform scraping operations on the surface and inside of the filter screen (25). The contact surface between the scraper (24) and the filter screen (25) is provided with scraping teeth matching the pores of the filter screen to ensure the smoothness of the filter screen filtration. By the forward and reverse rotation of the servo motor (12), the rotating grid (14) is driven to rotate in different directions, improving the filtration effect and driving the scraper (24) to scrape repeatedly. S3. The filtered wastewater is concentrated on the left side inside the second treatment tank (2). The electric telescopic rod one (8) fixed to the upper surface of the fixing plate one (7) drives the connecting baffle (9) to rise on the inner wall of the second treatment tank (2), allowing the wastewater to enter the middle side inside the second treatment tank (2). According to the colors of different types of textile printing and dyeing wastewater, the corresponding decolorizing agent is added for decolorization operation. After the decolorization is completed, the position of the receiving block (28) fixed to one end of the electric telescopic rod two (27) is raised by an external power source, enabling part of the decolorized wastewater to enter the inside of the connecting tube (29) through the pores where the receiving block (28) rises and the water inlet (35) opened inside the connecting tube (29), and then the receiving block (28) is lowered to close the water inlet channel. The air cylinder (33) provided at the bottom of the U-shaped frame two (32) drives the sealing movable plate (34) fixed to one end of the output shaft of the air cylinder (33) to move upward inside the connecting tube (29), moving the wastewater to be detected to the position of the observation transparent window (30) provided inside the connecting tube (29) to observe the sampled wastewater. After the sampled wastewater is pushed upward and contacts the waterproof chromaticity sensor (38), the wastewater can be detected. The position of the waterproof chromaticity sensor (38) is parallel to the position of the water outlet cylinder (31). After the detection is completed, the sealing movable plate (34) can be driven to discharge the detected wastewater into the inside of the second treatment tank (2) for recycling treatment operation. After using the waterproof chromaticity sensor (38), clean water can be discharged through the through slot above the waterproof chromaticity sensor (38) to clean the connecting tube (29) and the waterproof chromaticity sensor (38), and then the sealing movable plate (34) can be pushed to discharge the cleaned water into the inside of the second treatment tank (2) for treatment operation to avoid external pollution, etc. S4. After passing the inspection and observation, the water inside the connecting tube (29) is lifted by the power of the cylinder (33) so that it moves above the position of the observation transparent window (30) provided inside the connecting tube (29). The qualified wastewater is discharged back into the second treatment tank (2) through the water outlet tube (31) provided at the top of the connecting tube (29), and finally discharged from the second treatment tank (2) through the water outlet pipes (6) provided on both sides inside the second treatment tank (2), completing the wastewater treatment. Before discharging, it is necessary to block the water outlet pipes (6) on both sides. If the sampling inspection is unqualified, according to the degree of wastewater treatment in the sampling inspection, the corresponding amount of decolorizing agent is added again inside the second treatment tank (2), and the wastewater to be detected is discharged into the second treatment tank (2) again for decolorization operation until the decolorization is completed and then discharged according to the above-mentioned qualified discharge process.

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