Biological treatment device for dyeing and finishing wastewater of polyester chemical fabric and use method of biological treatment device

Abstract

The invention discloses a biological treatment device for dyeing and finishing wastewater of polyester chemical fabric and a use method of the biological treatment device, and belongs to the technical field of wastewater treatment.The biological treatment device comprises a first box body, a second box body and a third box body, and is characterized in that the second box body is arranged on one side of the first box body, the third box body is arranged at the upper end of the second box body, and a filter tank is arranged in the first box body; a sedimentation tank is arranged on one side of the filter tank, a neutralization tank is arranged on one side of the sedimentation tank, and a coagulation tank is arranged on one side of the neutralization tank; a first treatment groove is formed in the second box body, a second treatment groove is formed in one side of the first treatment groove, a third treatment groove is formed in one side of the second treatment groove, and heaters distributed in a linear array are arranged on the outer wall of the second box body; a communicating groove is formed in the outer wall of the third box body, and a pipeline connecting system is arranged on the outer wall of the second box body and the outer wall of the third box body. On the basis of biological treatment of dry wastewater, physical and chemical pretreatment can be carried out, and aerobic biological treatment or anaerobic biological treatment can be selectively carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and more specifically to a biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and a use method thereof. Background Art

[0002] Wastewater treatment is the process of treating industrial, agricultural or domestic sewage. The process aims to reduce the amount of pollutants in the wastewater to make it cleaner and avoid harm to the environment and human health. Different wastewater treatment methods include physical treatment, chemical treatment and biological treatment, which can effectively remove suspended solids, organic matter, nutrients and other pollutants.

[0003] After searching, the patent announcement number is CN111995018A, which discloses a leakage-proof deep wastewater treatment device for mechanical automated printing and dyeing, which relates to the technical field of wastewater treatment equipment and solves the problem that the existing wastewater treatment device, the stirring component, the feeding component and the filter cleaning component need to be driven and controlled by three motors respectively, and the number of motors required is large, which increases the cost of the equipment. A leakage-proof deep wastewater treatment device for mechanical automated printing and dyeing, including a box body, the box body includes a vertical positioning plate and a horizontal brace positioning plate, the top right position of the internal space of the box body is supported and welded with a vertical positioning plate, and the top middle position of the internal space of the box body is welded with a horizontal brace positioning plate, and the height of this horizontal brace positioning plate is lower than the vertical positioning plate. In the present invention, driven by the up and down sliding of the feed pipe, the rack can mesh and drive the brush rod to swing back and forth up and down to brush and clean the stainless steel filter, thereby extending its blockage cleaning cycle.

[0004] After searching, the patent announcement number is CN112850823A, which discloses a domestic wastewater treatment and disinfection device, which relates to the field of wastewater treatment. The domestic wastewater treatment and disinfection device includes a base, the upper surface of the base is fixedly connected to a shell A, the bottom of the shell A is fixedly connected to an exhaust mechanism, the bottom of the exhaust mechanism is fixedly connected to the lower surface of the base, one side of the exhaust mechanism is fixedly connected to a fixed cylinder, the inner curved surface of the fixed cylinder is fixedly connected to a fixed plate, and one side surface of the fixed plate is fixedly connected to a guide rail. The domestic wastewater treatment and disinfection device, the telescopic rod controls the tube to stretch, so as to realize the extraction of wastewater, and then injects the wastewater into the shell B through the reset spring, so that the conductive rod ignites hydrogen to generate high temperature to kill and disinfect the microorganisms in the wastewater, and the airflow generated by the hydrogen explosion drives the wastewater to be discharged, so as to solve the problem that although chemical disinfection can kill microorganisms immediately, it will produce other products besides water, and inaccurate dosage will also cause secondary pollution of wastewater.

[0005] However, the existing wastewater treatment devices lack pretreatment before microbial treatment, resulting in poor microbial treatment effects. Therefore, it is particularly important to develop a device that can pretreat wastewater and perform microbial treatment under a variety of temperature environments for the treatment of polyester chemical fiber fabric dyeing and finishing wastewater. This not only helps to evaluate product life, but also provides data support for improving design and improving product quality. Summary of the invention

[0006] 1. Technical issues to be solved

[0007] In view of the problems existing in the prior art, the purpose of the present invention is to provide a biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and a method of using the same. On the basis of achieving biological treatment of dry wastewater, the present invention can also perform physical and chemical pretreatment, and can selectively enter aerobic biological treatment or anaerobic biological treatment.

[0008] 2. Technical solution

[0009] To solve the above problems, the present invention adopts the following technical solutions:

[0010] A biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and a method of using the same, comprising a box body 1, a box body 2 and a box body 3, characterized in that: a box body 2 is provided on one side of the box body 1, a box body 3 is provided on the upper end of the box body 2, a filter tank is provided inside the box body 1, a sedimentation tank is provided on one side of the filter tank, a neutralization tank is provided on one side of the sedimentation tank, and a coagulation tank is provided on one side of the neutralization tank; a treatment tank 1 is provided inside the box body 2, a treatment tank 2 is provided on one side of the treatment tank 1, a treatment tank 3 is provided on one side of the treatment tank 2, a heater distributed in a linear array is provided on the outer wall of the box body 2; a connecting tank is provided on the outer wall of the box body 3, and a pipeline connection system is provided on the outer walls of the boxes 2 and 3.

[0011] As a preferred solution of the present invention, a mud outlet is opened on the outer wall of one side of the sedimentation tank, a mounting frame is fixed to one side of the upper end of the neutralization tank, a pH detector is fixed to the lower end of the mounting frame, the pH detector is electrically connected to the control rear end, a storage tank is fixed to the outer wall of one side of the coagulation tank, and a transmission pipe is provided at the upper end of the storage tank.

[0012] As a preferred solution of the present invention, a bracket one is fixed to a lower end of the box body, a base one is fixed to a lower end of the bracket, a bracket two is fixed to a lower end of the box body two, a base two is fixed to a lower end of the bracket two, and the box body three is fixedly connected to the box body two via the bracket three.

[0013] As a preferred solution of the present invention, the outer wall of one side of the box body two is fixed with two discharge ports distributed in a linear array, and the two discharge ports are respectively located at the lower end of the heater, and the outer wall of one side of the box body three is fixed with a connecting groove, and the lower end of the connecting groove is provided with three air outlet branch pipes, and each air outlet branch pipe is connected to the outer wall of one side of the box body two, the upper end of the connecting groove is provided with an air outlet main pipe, and one side of the box body three is provided with an exhaust pipe.

[0014] As a preferred solution of the present invention, a four-way valve is fixed on the outer wall of one side of the box body, a connecting pipe is provided on one side of the four-way valve, a three-way valve is fixed on the outer wall of one side of the box body through a mounting seat, the connecting pipe is connected to the lower end of the three-way valve, and three outlets are provided on the other side of the four-way valve.

[0015] As a preferred solution of the present invention, an outer wall of one side of the box body three is provided with a discharge port three, and a transfer tube is provided on one side of the discharge port three. The transfer tube is installed on the outer wall of the box body three through a fixing frame, and the transfer tube is connected to one side of the three-way valve, and the other side of the box body three is connected to the upper end pipe of the three-way valve.

[0016] As a preferred solution of the present invention, a supercharger is fixed to an outer wall of one side of the box body, a control panel is fixed to the lower end of the supercharger, and a pressure sensor and a temperature sensor are included in the control panel.

[0017] As a preferred solution of the present invention, a plurality of pipelines are arranged inside the second box, each pipeline is connected to the first processing tank, the second processing tank and the third processing tank, and the internal pipelines are all connected to the four-way valve.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] (1) The present invention designs physical filtration, static sedimentation and chemical treatment before biological treatment, and uses neutralization and coagulation to achieve chemical treatment, thereby achieving pretreatment before microbial treatment and providing a basis for subsequent processing.

[0021] (2) The present invention achieves a highly efficient wastewater treatment effect by combining the designed nutrient-rich microorganism treatment and the anaerobic microorganism treatment, and the anaerobic treatment has three temperature levels, which can adaptively treat wastewater of different components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a box body of a biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and a method for using the same according to the present invention;

[0023] Figure 2 A schematic diagram of a filter screen of a biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and a method for using the same according to the present invention;

[0024] Figure 3 It is a three-dimensional schematic diagram of the first angle of the box body 1 and the box body 2 of the biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and the use method thereof of the present invention;

[0025] Figure 4 It is a three-dimensional schematic diagram of the second angle of the box body 1 and the box body 2 of the biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and the use method thereof of the present invention;

[0026] Figure 5 The present invention is a schematic diagram of the internal structure of box 2 of a biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and a method for using the same.

[0027] Description of the numbers in the figure:

[0028] 1. Box 1; 2. Base 1; 3. Storage tank; 4. Transmission pipe; 5. Coagulation tank; 6. Neutralization tank; 7. Mounting rack; 8. Sedimentation tank; 9. Filter tank; 10. Check valve; 11. Feed inlet 1; 12. Bracket 1; 13. Mud outlet; 14. Filter screen; 15. Discharge outlet 1; 16. pH detector; 17. Booster; 18. Control panel; 19. Three-way valve; 20. Feed inlet 2; 21. Installation Seat; 22. Connecting pipe; 23. Four-way valve; 24. Bracket 2; 25. Outlet branch pipe; 26. Base 2; 27. Outlet 2; 28. Heater; 29. ​​Fixing frame; 30. Bracket 3; 31. Transfer pipe; 32. Connecting groove; 33. Outlet main pipe; 34. Exhaust pipe; 35. Box 3; 36. Box 2; 37. Outlet 3; 38. Processing tank 1; 39. Processing tank 2; 40. Processing tank 3. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example:

[0031] See also Figure 1-5 A biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and a method of using the same, comprising a box body 1, a box body 2 36 and a box body 35, characterized in that: a box body 2 36 is provided on one side of the box body 1, a box body 3 35 is provided on the upper end of the box body 2 36, a filter tank 9 is provided inside the box body 1, a sedimentation tank 8 is provided on one side of the filter tank 9, a neutralization tank 6 is provided on one side of the sedimentation tank 8, and a coagulation tank 5 is provided on one side of the neutralization tank 6;

[0032] A processing tank 1 38 is provided inside the second box 36, a processing tank 2 39 is provided on one side of the processing tank 1 38, a processing tank 3 40 is provided on one side of the processing tank 2 39, and heaters 28 distributed in a linear array are provided on the outer wall of the second box 36;

[0033] The outer wall of the box body 3 35 is provided with a connecting groove 32, and the outer walls of the box body 2 36 and the box body 3 35 are provided with a pipeline connection system;

[0034] There are several main methods for treating wastewater after fabric production:

[0035] a. Sedimentation method: The wastewater stays in the sedimentation tank 8 for a period of time, allowing the suspended solid particles, such as fiber debris, silt, etc. to settle to the bottom of the tank under the action of gravity, and then the sediment can be removed by mud discharge equipment;

[0036] b. Filtration method: The wastewater is passed through a porous filter medium, such as quartz sand, filter screen 14, etc., to intercept solid impurities in the wastewater, thereby achieving the purpose of purification.

[0037] c. Neutralization method: If the pH value of wastewater exceeds the normal range, it can be neutralized with acidic or alkaline substances. For example, for wastewater with strong alkalinity, acidic substances such as sulfuric acid can be added to adjust the pH value to the appropriate range;

[0038] d. Coagulation method: Add coagulants, such as polyaluminium chloride, to the wastewater to aggregate the fine suspended particles and colloids in the wastewater into larger flocs, which are then removed by sedimentation or filtration;

[0039] e. Aerobic biological treatment: Place the wastewater in an oxygen environment and use aerobic microorganisms, such as those in activated sludge, to decompose the organic matter in the wastewater and convert it into harmless substances such as carbon dioxide and water. The temperature of aerobic biological treatment of wastewater is generally set between 20℃-40℃, and the optimal temperature is 25℃-30℃. Within this temperature range, the metabolic rate of microorganisms is relatively vigorous and can effectively degrade the organic matter in the wastewater. Under normal circumstances, aerobic biological treatment of wastewater has no strict requirements on air pressure and can operate normally under normal pressure, but during aeration, it is necessary to ensure that the dissolved oxygen concentration in the water is between 0.3mg / L-2mg / L to provide sufficient oxygen for aerobic microorganisms to carry out metabolic activities;

[0040] f. Anaerobic biological treatment: Under anaerobic conditions, anaerobic microorganisms are allowed to decompose organic matter. This process will produce biogas and reduce the content of organic matter in the wastewater. When anaerobic biological treatment of wastewater is carried out, the suitable breeding temperature of anaerobic organisms is 5℃-60℃. Generally, medium-temperature anaerobic treatment needs to be controlled at 30℃-38℃, and high-temperature anaerobic treatment needs to be controlled at around 50℃-60℃. Temperature has a significant effect on the anaerobic biological degradation rate of organic matter, and the temperature should be controlled within a certain range according to specific needs. Similar to aerobic biological treatment, anaerobic biological treatment is usually carried out under normal pressure, but the anaerobic environment must be strictly controlled to ensure that the redox potential is in an appropriate range. For example, the redox potential should be -560 mV to -600 mV during high-temperature fermentation and -300 mV to -350 mV during medium-temperature fermentation.

[0041] In a specific embodiment of the present invention, a filter screen 14 designed to be distributed in a linear array is provided inside the filter tank 9, a feed port 11 is provided on one side of the filter tank 9, and a one-way valve 10 is provided between the filter tank 9, the sedimentation tank 8, the neutralization tank 6 and the coagulation tank 5, and the direction of the one-way valve 10 is from left to right.

[0042] Specifically, a discharge port 15 is provided on the other side of the box body 36, and the multi-layer filter screen 14 can directly filter out large impurities inside the wastewater, and the one-way valve 10 can be controlled by the back-end control system 28 to achieve the output control effect of the wastewater.

[0043] In a specific embodiment of the present invention, a mud outlet 13 is opened on the outer wall of one side of the sedimentation tank 8, a mounting frame 7 is fixed to one side of the upper end of the neutralization tank 6, a pH detector 16 is fixed to the lower end of the mounting frame 7, the pH detector 16 is electrically connected to the control rear end, a storage tank 3 is fixed to the outer wall of one side of the coagulation tank 5, and a transmission pipe 4 is provided at the upper end of the storage tank 3.

[0044] Specifically, the mud outlet 13 can be used to manually remove the sludge settled in the pool, and a water pump is provided inside the storage tank 3 to assist in transferring the coagulant to the temporal part of the coagulation tank 5 for use.

[0045] In a specific embodiment of the present invention, a bracket 12 is fixed to the lower end of the box body 1, a base 2 is fixed to the lower end of the bracket 12, a bracket 24 is fixed to the lower end of the box body 2 36, and a base 26 is fixed to the lower end of the bracket 24.

[0046] Specifically, the box body three 35 and the box body two 36 are fixedly connected by the bracket three 30, and the base one 2 and the base two 26 can increase the stability of the device and reduce the propagation of noise.

[0047] In a specific embodiment of the present invention, a second discharge port 27 distributed in a linear array is fixed to the outer wall of one side of the box body 2 36 , and the second discharge port 27 is respectively located at the lower end of the heater 28 , a connecting groove 32 is fixed to the outer wall of one side of the box body 3 35 , and three air outlet branch pipes 25 are arranged at the lower end of the connecting groove 32 , and each air outlet branch pipe 25 is connected to the outer wall of one side of the box body 2 36 , an air outlet main pipe 33 is arranged at the upper end of the connecting groove 32 , and an exhaust pipe 34 is arranged at one side of the box body 3 35 .

[0048] Specifically, the heater 28 can heat the temperatures inside treatment tank 1 38 , treatment tank 2 39 and treatment tank 3 40 to the temperature ranges of low, medium and high temperature anaerobic biological reactions, respectively. After anaerobic biological treatment, methane will be produced, which can be discharged from the outlet branch pipe 25 .

[0049] In a specific embodiment of the present invention, a four-way valve 23 is fixed to the outer wall of one side of the box body 36, a connecting pipe 22 is provided on one side of the four-way valve 23, a three-way valve 19 is fixed to the outer wall of one side of the box body 36 through a mounting seat 21, and the connecting pipe 22 is connected to the lower end of the three-way valve 19.

[0050] Specifically, three outlets are provided on the other side of the four-way valve 23. Both the three-way valve 19 and the four-way valve 23 are controlled by a back-end control system, and the flow direction of the wastewater can be conveniently adjusted.

[0051] In a specific embodiment of the present invention, a discharge port 37 is provided on the outer wall of one side of the box body 35, and a transfer tube 31 is provided on one side of the discharge port 37. The transfer tube 31 is installed on the outer wall of the box body 35 through a fixing frame 29. The transfer tube 31 is connected to one side of the three-way valve 19, and the other side of the box body 35 is connected to the upper end pipeline of the three-way valve 19.

[0052] Specifically, the discharge port 37 can discharge the wastewater after the anaerobic biological treatment, and the transfer pipe 31 can pass the wastewater after the anaerobic biological treatment to the anaerobic biological treatment again.

[0053] In a specific embodiment of the present invention, a supercharger 17 is fixed to an outer wall of one side of the box body 35, a control panel 18 is fixed to the lower end of the supercharger 17, and a pressure sensor and a temperature sensor are included in the control panel 18.

[0054] Specifically, the booster 17 can add appropriate pressure to the interior of the box body 35, which is helpful to improve the treatment effect of the organisms.

[0055] In a specific embodiment of the present invention, a plurality of pipelines are provided inside the second box 36 , each pipeline is connected to the processing tank 1 38 , the processing tank 2 39 and the processing tank 3 40 , and the internal pipelines are all connected to the four-way valve 23 .

[0056] A biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and a method for using the same, comprising the following steps:

[0057] S1: Before use, the wastewater to be treated is introduced from the feed port 11, and the wastewater first enters the filter tank, and then enters the filter screen 14 for treatment, which can separate the large impurities inside the wastewater. The separated wastewater enters the sedimentation tank 8 through the one-way valve 10. After 30 minutes of sedimentation, the wastewater continues to enter the neutralization tank 6 through the one-way valve 10, and then the silt is discharged through the mud outlet 13;

[0058] S2: After the wastewater enters the neutralization tank 6, the pH value of the wastewater is detected by the pH detector 16. According to the pH value detection, acidic solution or alkaline solution is artificially added to perform acid-base neutralization treatment. The treated wastewater enters the coagulation tank 5 through the one-way valve 10. After entering the coagulation tank 5, the water pump built into the collection tank will add coagulant to the inside through the transmission pipe 4, and the treated wastewater will be discharged from the discharge port 15;

[0059] S3: The wastewater output from the discharge port 15 will enter the three-way valve 19 from the feed port 20, and will be processed by switching the three-way valve 19, and then will be passed into the box body 35, and the inside of the box body 35 will be treated by the good breeding organisms. The carbon dioxide generated after the treatment will be discharged from the exhaust pipe 34, and then the waste liquid after the treatment will be connected to the three-way valve 19 from the transfer pipe 31 and enter the four-way valve 23;

[0060] S4: The three-way valve 19 can be used to directly introduce the liquid inside the three-way valve 19 into the four-way valve 23. The waste liquid inside the four-way valve 23 can be controlled by the back-end control system to enter the treatment tank one 38, the treatment tank two 39 or the treatment tank three 40. The treatment tank one 38 is a low-temperature anaerobic biological treatment, the treatment tank two 39 is a medium-temperature anaerobic biological treatment, and the treatment tank three 40 is a high-temperature anaerobic biological treatment. The methane gas generated after the treatment will be output from the outlet branch pipe 25, and then discharged from the outlet main pipe 33 after mixing. The treated wastewater can be discharged and collected from the outlet port two 27 and the outlet port three 37.

[0061] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and improved concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A biological treatment device for polyester chemical fiber fabric dyeing and finishing wastewater and a method for using the same, comprising a first box (1), a second box (36) and a third box (35), characterized in that: A second box (36) is provided on one side of the box body one (1), a third box (35) is provided on the upper end of the second box (36), a filter tank (9) is provided inside the box body one (1), a sedimentation tank (8) is provided on one side of the filter tank (9), a neutralization tank (6) is provided on one side of the sedimentation tank (8), and a coagulation tank (5) is provided on one side of the neutralization tank (6); The second box (36) is provided with a processing tank (38) inside, a processing tank (39) is provided on one side of the processing tank (38), a processing tank (40) is provided on one side of the processing tank (39), and a heater (28) distributed in a linear array is provided on the outer wall of the second box (36); The outer wall of the box body three (35) is provided with a connecting groove (32), and the outer walls of the box body two (36) and the box body three (35) are provided with a pipeline connection system.

2. A biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and a method for using the same according to claim 1, characterized in that: The filter tank (9) is provided with a filter screen (14) designed to be distributed in a linear array inside, and a feed port (11) is provided on one side of the filter tank (9). A one-way valve (10) is provided between the filter tank (9), the sedimentation tank (8), the neutralization tank (6) and the coagulation tank (5), and the direction of the one-way valve (10) is from left to right. A discharge port (15) is provided on the other side of the second box body (36).

3. The biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and its use method according to claim 1, characterized in that: A mud outlet (13) is provided on the outer wall of one side of the sedimentation tank (8); a mounting frame (7) is fixed on one side of the upper end of the neutralization tank (6); a pH detector (16) is fixed on the lower end of the mounting frame (7); the pH detector (16) is electrically connected to the control rear end; a storage tank (3) is fixed on the outer wall of one side of the coagulation tank (5); a transmission pipe (4) is provided on the upper end of the storage tank (3).

4. The biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and the use method thereof according to claim 1 are characterized in that: The lower end of the box body 1 (1) is fixed with a bracket 1 (12), the lower end of the bracket 1 (12) is fixed with a base 1 (2), the lower end of the box body 2 (36) is fixed with a bracket 2 (24), the lower end of the bracket 2 (24) is fixed with a base 2 (26), and the box body 3 (35) is fixedly connected to the box body 2 (36) via a bracket 3 (30).

5. The biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and the use method thereof according to claim 1, characterized in that: The outer wall of one side of the second box body (36) is fixed with two discharge ports (27) distributed in a linear array, and the two discharge ports (27) are respectively located at the lower end of the heater (28). The outer wall of one side of the third box body (35) is fixed with a connecting groove (32), and the lower end of the connecting groove (32) is provided with three air outlet branch pipes (25), and each air outlet branch pipe (25) is connected to the outer wall of one side of the second box body (36). The upper end of the connecting groove (32) is provided with an air outlet main pipe (33), and one side of the third box body (35) is provided with an exhaust pipe (34).

6. The biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and the use method thereof according to claim 1, characterized in that: A four-way valve (23) is fixed on the outer wall of one side of the second box body (36), a connecting pipe (22) is provided on one side of the four-way valve (23), a three-way valve (19) is fixed on the outer wall of one side of the second box body (36) through a mounting seat (21), the connecting pipe (22) is connected to the lower end of the three-way valve (19), three outlets are provided on the other side of the four-way valve (23), and a second feed port (20) is provided on one side of the three-way valve (19).

7. The biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and the use method thereof according to claim 1, characterized in that: The outer wall of one side of the box body three (35) is provided with a discharge port three (37), and one side of the discharge port three (37) is provided with a transfer pipe (31). The transfer pipe (31) is installed on the outer wall of the box body three (35) through a fixing frame (29). The transfer pipe (31) is connected to one side of the three-way valve (19), and the other side of the box body three (35) is connected to the upper end pipeline of the three-way valve (19).

8. The biological treatment device for polyester chemical fiber cloth dyeing and finishing wastewater and its use method according to claim 1, characterized in that: A supercharger (17) is fixed to the outer wall of one side of the box body (35), and a control panel (18) is fixed to the lower end of the supercharger (17). The control panel (18) contains a pressure sensor and a temperature sensor.

9. The biological treatment device for polyester chemical fiber fabric dyeing and finishing wastewater and its use method according to claim 1, characterized in that: The second box (36) is provided with a plurality of pipelines inside, each pipeline is connected to the first processing tank (38), the second processing tank (39) and the third processing tank (40), and the internal pipelines are all connected to the four-way valve (23).

10. The biological treatment method for polyester chemical fiber fabric dyeing and finishing wastewater according to claim 1, characterized in that: S1: Before use, the wastewater to be treated is introduced from the feed port. The wastewater first enters the filter tank. The treatment of the filter screen can separate the large impurities in the wastewater. The separated wastewater enters the sedimentation tank through a one-way valve. After 30 minutes of sedimentation, the wastewater continues to enter the neutralization tank through the one-way valve, and then the silt is discharged through the mud outlet; S2: After the wastewater enters the neutralization tank, the pH value of the wastewater is tested by a pH tester. According to the pH value test results, acidic solution or alkaline solution is added to the wastewater to perform acid-base neutralization treatment. The treated wastewater passes through a one-way valve and enters the coagulation tank. After entering the coagulation tank, the water pump built into the collection tank will add coagulant to the wastewater through the transmission pipe, and the treated wastewater will be discharged from the discharge port 1. S3: The wastewater output from the discharge port 1 will enter the three-way valve from the feed port 2, and will be processed by switching the three-way valve, and then it can be passed into the box body 3. The inside of the box body 3 is treated by good breeding organisms. The carbon dioxide generated after the treatment will be discharged from the exhaust pipe, and then the treated waste liquid will be connected to the three-way valve from the transfer pipe and then enter the four-way valve; S4: The three-way valve can be used to directly introduce the liquid inside the three-way valve into the four-way valve. The waste liquid inside the four-way valve can be controlled by the back-end control system to enter treatment tank one, treatment tank two or treatment tank three. Treatment tank one is low-temperature anaerobic biological treatment, treatment tank two is medium-temperature anaerobic biological treatment, and treatment tank three is high-temperature anaerobic biological treatment. The methane gas generated after treatment will be output from the outlet branch pipe, and then discharged from the outlet main pipe after mixing. The treated wastewater can be discharged and collected from outlet port two and outlet port three.

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