A comprehensive biological toxicity degradation treatment equipment and method for coking wastewater

Abstract

The application discloses a kind of coking sewage comprehensive biological toxicity degradation treatment equipment and method, equipment includes pretreatment component, oxidation treatment component and depth treatment component;Pretreatment component is used to separate filtration treatment to large particle impurities in coking wastewater, to improve the biodegradability of coking wastewater;Oxidation treatment component is used to carry out anaerobic, aerobic treatment to coking wastewater after pretreatment, to degrade insoluble organic matter and C-containing organic matter in coking wastewater;Depth treatment component is used to carry out fine pressure filtration treatment to coking wastewater after oxidation treatment;The equipment structure of the application is reasonable in design, effectively reduces the biological toxicity of coking wastewater, and is suitable for use.

Description

Technical Field

[0001] This invention relates to the field of chemical wastewater treatment technology, specifically to a comprehensive biotoxic degradation treatment device and method for coking wastewater. Background Technology

[0002] Coking wastewater is a typical toxic and recalcitrant organic wastewater. It mainly comes from the initial cooling of coke oven gas, production water used in the coking process, and steam condensation wastewater. The easily degradable organic compounds in coking wastewater are mainly phenolic compounds and benzene compounds, including degradable organic compounds such as arsenic trioxide, naphthalene, furan, and imidazole, as well as recalcitrant organic compounds such as arsenic idine, carbazole, biphenyl, and terphenyl.

[0003] Currently, the commonly used treatment technology for wastewater containing recalcitrant organic pollutants is biological treatment. However, due to the presence of recalcitrant pollutants in the wastewater, conventional biological treatment processes often fail to achieve ideal removal results, leading to high levels of recalcitrant pollutants in the effluent and COD levels that fail to meet standards. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a comprehensive biotoxic degradation treatment device and method for coking wastewater.

[0005] The technical solution of this invention is as follows: a comprehensive biotoxicity degradation treatment device for coking wastewater, comprising a pretreatment component, an oxidation treatment component disposed at the lower end of the pretreatment component, and a deep treatment component disposed inside the oxidation treatment component; the pretreatment component includes a treatment tank, a primary separation screen plate sleeved inside the treatment tank at an upper position, a lifting sleeve disposed inside the treatment tank and penetrating the primary separation screen plate, a lifting screw rotatably engaged inside the lifting sleeve, and a pretreatment motor disposed at the top of the treatment tank and providing power to the lifting screw; an inlet pipe is disposed on the side wall of the treatment tank below the primary separation screen plate, and a drain pipe is disposed above the primary separation screen plate; an inlet trough is disposed at the bottom of the lifting sleeve, and a gap is reserved between the top of the lifting sleeve and the top of the treatment tank;

[0006] The oxidation treatment assembly includes an oxidation chamber located at the lower end of the treatment chamber, an equipment box located at the lower end of the oxidation chamber, and an oxygen generator located on the equipment box. The oxidation chamber is connected to the treatment chamber via a connecting pipe, and a control valve is installed on the connecting pipe. A dosing pipe, a cleaning cover, an exhaust pipe, and a clean water pipe are installed on the side wall of the oxidation chamber. A gas collecting sleeve connected to the oxygen generator is installed on the side wall of the oxidation chamber below the dosing pipe, and an aeration pipe penetrating the oxidation chamber is installed inside the gas collecting sleeve.

[0007] The deep treatment component includes a screen cylinder fitted inside the oxidation chamber, several guide rods equidistantly distributed inside the screen cylinder and penetrating the equipment box, an extrusion plate fitted inside the screen cylinder and slidably engaged with the guide rods, an extrusion motor located inside the equipment box and providing power to the extrusion plate, a sealing disc located at the upper end of the screen cylinder and connected to the guide rods, and a traction component providing power to the guide rods; both the dosing pipe and the aeration pipe penetrate the screen cylinder; a drop plate connected to the inner wall of the oxidation chamber is provided at the top of the screen cylinder, and the drop plate is provided with a sealing hole that can be movably engaged with the sealing disc; the output end of the extrusion motor is provided with a drive screw threadedly connected to the extrusion plate.

[0008] Furthermore, the traction component includes a traction motor mounted on the top of the equipment box, a connecting ring mounted inside the equipment box and connected to each guide rod, and several traction screws equidistantly distributed inside the equipment box and threadedly connected to the connecting rings respectively; the output shaft of the traction motor passes through the equipment box and is equipped with a driving gear, and each traction screw is fitted with a driven gear; a gear disc is rotatably engaged at the bottom of the equipment box and meshes with the driven gear and the driving gear respectively;

[0009] Explanation: The traction motor drives the drive gear to rotate, which in turn causes the gear disc and driven gear to rotate simultaneously. The traction screw connected to the driven gear drives the connecting ring to move downward along the equipment box. At this time, each guide rod pulls the sealing disc downward, sealing the sealing holes on the drop plate, creating favorable conditions for the pressure filtration treatment of coking wastewater.

[0010] Furthermore, two sliding sleeves are slidably engaged on the drive screw, and several stirring rods are movably hinged to the circumference of the two sliding sleeves. Each stirring rod between the two sliding sleeves is movably hinged to the other, and a return torsion spring is provided at the hinge.

[0011] Explanation: During the rotation of the drive screw, each stirring rod is driven to rotate, thereby mixing the coking wastewater with the treatment agent; while during the movement of the extrusion plate, the two sliding sleeves are pushed closer to each other, which changes the stirring path of the stirring rods and further improves the effect of the stirring rods.

[0012] Furthermore, a secondary separation screen is installed inside the processing box, located below the primary separation screen. The mesh diameter of the secondary separation screen is smaller than that of the primary separation screen.

[0013] Note: By setting up a two-stage separation screen, coking wastewater can be filtered in two stages, reducing the difficulty of biochemical treatment of coking wastewater.

[0014] Furthermore, a linkage gear is fitted onto one end of the lifting screw near the top of the treatment box. Several shafts are equidistantly distributed between the primary and secondary separation screens. Each shaft has a small gear at a position corresponding to the primary and secondary separation screens, and the small gear at the top of each shaft meshes with the linkage gear. Rotary sleeves that mesh with the small gears through tooth pressure are rotatably engaged on both the primary and secondary separation screens. Each rotating sleeve has a cleaning scraper on its outer wall. Collection sleeves that communicate with the inside of the treatment box are installed on the side wall of the treatment box, corresponding to the positions of the primary and secondary separation screens, and the sewage pipe is connected to the collection sleeve.

[0015] Explanation: During the rotation of the lifting screw, the linkage gear rotates, which in turn causes the corresponding shaft and pinion to rotate. This, in turn, drives the rotating sleeve and the cleaning scraper to rotate, removing contaminants from the primary and secondary separation screens. The removed contaminants enter the collection sleeve and are eventually discharged through the drain pipe, thus preventing the primary and secondary separation screens from becoming clogged and affecting the equipment's pretreatment effect on coking wastewater.

[0016] Furthermore, the inside of the mesh cylinder is provided with a filling groove; the mesh openings on the mesh cylinder correspond to the positions of the filling grooves;

[0017] Instructions: When using, fill the filling tank with activated carbon particles with a particle size of 1-3mm. When the wastewater flows through the filling tank, the activated carbon particles will adsorb and purify the insoluble organic matter in the coking wastewater, which will help improve the thoroughness of coking wastewater treatment.

[0018] Furthermore, the equipment box is equipped with a biogas collector connected to the exhaust pipe;

[0019] Note: Using a biogas collector to collect biogas generated during the anaerobic and aerobic treatment of coking wastewater not only improves the safety of the equipment but also enhances its economic efficiency.

[0020] Furthermore, a drain trough is provided on the side wall of the lifting sleeve;

[0021] Explanation: By setting a drain trough on the lifting sleeve, when the coking wastewater rises inside the lifting sleeve under the action of the lifting screw, the suspended pollutants in the wastewater are discharged through the drain trough, which helps to reduce the power loss of the pretreatment motor.

[0022] This invention also provides a method for comprehensive biotoxic degradation treatment of coking wastewater, based on the above-mentioned comprehensive biotoxic degradation treatment equipment for coking wastewater, comprising the following steps:

[0023] S1. Connect the pretreatment motor, oxygen generator, extrusion motor and traction component to the external power source respectively;

[0024] S2. The coking wastewater to be treated is introduced into the treatment tank through the inlet pipe. Then, the pretreatment motor is started, and the pretreatment motor drives the lifting screw to rotate. The coking wastewater is lifted by the lifting screw and falls back into the lower part of the treatment tank after being filtered by the primary separation screen. The impurities in the coking wastewater are filtered and separated by the primary separation screen.

[0025] S3. Open the control valve on the connecting pipe to allow the pretreated coking wastewater to enter the oxidation tank. Then, introduce anaerobic bacteria into the oxidation tank through the dosing pipe to allow the coking wastewater to react anaerobically with the anaerobic bacteria, thus degrading the recalcitrant organic matter in the coking wastewater. Finally, introduce aerobic bacteria into the oxidation tank through the dosing pipe and introduce oxygen into the oxidation tank through the oxygen generator to allow the coking wastewater to react aerobically with the aerobic bacteria, thus degrading the carbon-containing organic matter in the coking wastewater. The anaerobic bacteria are Bacillus licheniformis, with a dosage of 500–750 PPM and an anaerobic reaction time of 25–46 hours. The aerobic bacteria are Escherichia coli, with a dosage of 350–550 PPM and an aerobic reaction time of 30–50 hours.

[0026] S4. Coagulant is added to the treated coking wastewater through the dosing pipe, allowing the wastewater to react fully with the coagulant. Then, the traction component moves the sealing disc and guide rod downward along the screen cylinder to seal the sealing holes on the drop plate. Finally, the extrusion motor drives the drive screw to rotate, causing the extrusion plate to move upward along the guide rod, and the coking wastewater undergoes pressure filtration treatment. The filtration effluent is discharged through the clean water pipe, and the filter cake is cleaned through the cleaning cover. The coagulant is polyacrylamide, the dosage is 10-15 mg / L, and the coagulation time is 20-35 min.

[0027] Compared with the prior art, the beneficial effects of the present invention are reflected in the following aspects:

[0028] First, the equipment structure of the present invention is reasonably designed. By performing filtration pretreatment, biochemical treatment and pressure filtration on coking wastewater, the insoluble organic matter in the wastewater is completely removed, reducing the biotoxicity of coking wastewater, thereby improving the safety of wastewater discharge and saving water resources.

[0029] Secondly, the present invention pre-treats coking wastewater through two-stage filtration and separation, thereby removing large particulate impurities from the wastewater, improving the biodegradability of coking wastewater, and reducing the difficulty of oxidizing coking wastewater; at the same time, the pollutants separated during the pre-treatment process can automatically enter the collection sleeve for collection, reducing the labor intensity of manually cleaning the separation plate and improving the working efficiency of the equipment.

[0030] Third, by filling the inside of the mesh cylinder with activated carbon particles, the wastewater comes into contact with the activated carbon particles during the filtration process. By utilizing the high-efficiency adsorption of the activated carbon particles, the wastewater is further purified, thus improving the degradation and purification effect of organic matter in the wastewater. Attached Figure Description

[0031] Figure 1 This is a longitudinal sectional view of the device of the present invention;

[0032] Figure 2 This is a front view of the device of the present invention;

[0033] Figure 3 This is a schematic diagram showing the connection between the primary separation screen and the processing box of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the mesh tube of the present invention;

[0035] Figure 5 This is a schematic diagram of the connection between the extrusion plate and the guide rod of the present invention;

[0036] Figure 6 This is a schematic diagram showing the connection between the gear disk and the driving gear and driven gear of the present invention;

[0037] Among them, 1-pretreatment component, 10-treatment box, 100-inlet pipe, 101-drainage pipe, 11-primary separation screen, 12-lifting sleeve, 120-inlet tank, 121-drainage tank, 13-lifting screw, 14-pretreatment motor, 15-secondary separation screen, 16-linkage gear, 160-shaft, 161-pinion, 17-rotating sleeve, 170-cleaning scraper, 171-collecting sleeve, 2-oxidation treatment component, 20-oxidation box, 200-dosing pipe, 201-cleaning cover, 202-exhaust pipe, 203- 21-Clear water pipe, 22-Equipment box, 22-Oxygen generator, 220-Gas collection sleeve, 221-Aeration pipe, 3-Deep treatment component, 30-Net cylinder, 300-Water drop plate, 301-Filling trough, 31-Guide rod, 32-Extrusion plate, 33-Extrusion motor, 330-Drive screw, 34-Sealing disc, 35-Traction component, 350-Traction motor, 3500-Drive gear, 351-Connecting ring, 352-Traction screw, 3520-Driven gear, 353-Gear disc, 36-Sliding sleeve, 360-Stirring rod, 4-Biogas collector. Detailed Implementation

[0038] Example 1

[0039] like Figure 1 , 2The coking wastewater integrated biotoxicity degradation treatment equipment shown includes a pretreatment component 1, an oxidation treatment component 2 located at the lower end of the pretreatment component 1, and a deep treatment component 3 located inside the oxidation treatment component 2. The pretreatment component 1 includes a treatment tank 10, a primary separation screen plate 11 sleeved inside the treatment tank 10 at an upper position, a lifting sleeve 12 located inside the treatment tank 10 and penetrating the primary separation screen plate 11, a lifting screw 13 rotatably engaged inside the lifting sleeve 12, and a pretreatment motor 14 located at the top of the treatment tank 10 and providing power to the lifting screw 13. A water inlet pipe 100 is provided on the side wall of the treatment tank 10 below the primary separation screen plate 11, and a sewage discharge pipe 101 is provided above the primary separation screen plate 11. A water inlet trough 120 is provided at the bottom of the lifting sleeve 12, and a gap is reserved between the top of the lifting sleeve 12 and the top of the treatment tank 10.

[0040] like Figure 1 , 2 As shown, the oxidation treatment assembly 2 includes an oxidation box 20 located at the lower end of the treatment box 10, an equipment box 21 located at the lower end of the oxidation box 20, and an oxygen generator 22 located on the equipment box 21. The oxidation box 20 is connected to the treatment box 10 through a connecting pipe, and a control valve is provided on the connecting pipe. A dosing pipe 200, a cleaning cover 201, an exhaust pipe 202, and a clean water pipe 203 are provided on the side wall of the oxidation box 20. A gas collecting sleeve 220 connected to the oxygen generator 22 is provided on the side wall of the oxidation box 20 and below the dosing pipe 200. An aeration pipe 221 penetrating the oxidation box 20 is provided inside the gas collecting sleeve 220.

[0041] like Figure 1 , 5 As shown, the deep treatment component 3 includes a screen cylinder 30 fitted inside the oxidation tank 20, four guide rods 31 equidistantly distributed inside the screen cylinder 30 and penetrating the equipment box 21, an extrusion plate 32 fitted inside the screen cylinder 30 and slidably engaged with the guide rods 31, an extrusion motor 33 installed inside the equipment box 21 and providing power to the extrusion plate 32, a sealing disc 34 installed at the upper end of the screen cylinder 30 and connected to the guide rods 31, and a traction component 35 providing power to the guide rods 31; the dosing pipe 200 and the aeration pipe 221 both penetrate the screen cylinder 30; a drop plate 300 connected to the inner wall of the oxidation tank 20 is provided at the top of the screen cylinder 30, and a sealing hole is provided on the drop plate 300 that can be movably engaged with the sealing disc 34; the output end of the extrusion motor 33 is provided with a drive screw 330 threadedly connected to the extrusion plate 32; the traction component 35 is a commercially available product.

[0042] Example 2

[0043] This embodiment describes a comprehensive biotoxic degradation treatment method for coking wastewater, based on a comprehensive biotoxic degradation treatment device for coking wastewater according to Embodiment 1, including the following steps:

[0044] S1. Connect the pretreatment motor 14, oxygen generator 22, extrusion motor 33 and traction component 35 to an external power source respectively.

[0045] S2. The coking wastewater to be treated is introduced into the treatment tank 10 through the inlet pipe 100. Then, the pretreatment motor 14 is started. The pretreatment motor 14 drives the lifting screw 13 to rotate. The coking wastewater is lifted by the lifting screw 13 and falls back into the lower end of the treatment tank 10 after being filtered by the primary separation screen 11. The impurities in the coking wastewater are filtered and separated by the primary separation screen 11.

[0046] S3. Open the control valve on the connecting pipe to allow the pretreated coking wastewater to enter the oxidation tank 20. Then, anaerobic bacteria are introduced into the oxidation tank 20 through the dosing pipe 200, causing an anaerobic reaction between the coking wastewater and the anaerobic bacteria. The anaerobic bacteria degrade the recalcitrant organic matter in the coking wastewater. Finally, aerobic bacteria are introduced into the oxidation tank 20 through the dosing pipe 200, and oxygen is introduced into the oxidation tank 20 through the oxygen generator 22. This causes an aerobic reaction between the coking wastewater and the aerobic bacteria, allowing the anaerobic bacteria to degrade the carbon-containing organic matter in the coking wastewater. The anaerobic bacteria are Bacillus licheniformis, with a dosage of 5000 PPM and an anaerobic reaction time of 25 hours. The aerobic bacteria are Escherichia coli, with a dosage of 350 PPM and an aerobic reaction time of 30 hours.

[0047] S4. Coagulant is added to the treated coking wastewater through the dosing pipe 200, and the wastewater reacts fully with the coagulant. Then, the traction component 35 drives the sealing disc 34 and guide rod 31 to move downward along the screen cylinder 30 to seal the sealing holes on the drop plate 300. Finally, the extrusion motor 33 drives the drive screw 330 to rotate, causing the extrusion plate 32 to move upward along the guide rod 31, and the coking wastewater is subjected to pressure filtration treatment. The filter effluent is discharged through the clear water pipe 203, and the filter cake is cleaned through the cleaning cover 201. The coagulant is polyacrylamide, the dosage of coagulant is 10 mg / L, and the coagulation time is 20 min.

[0048] Example 3

[0049] The difference between this implementation and Example 1 is that:

[0050] like Figure 1 , 2As shown in Figure 6, the traction component 35 includes a traction motor 350 disposed at the top of the equipment box 21, a connecting ring 351 disposed inside the equipment box 21 and connected to each guide rod 31, and four traction screws 352 equidistantly distributed inside the equipment box 21 and threadedly connected to the connecting rings 351 respectively; the output shaft of the traction motor 350 passes through the equipment box 21 and is provided with a drive gear 3500 on the output shaft, and each traction screw 352 is fitted with a driven gear 3520; a gear disc 353 is rotatably engaged at the bottom of the equipment box 21 and is respectively meshed with the driven gear 3520 and the drive gear 3500.

[0051] Example 4

[0052] This embodiment describes a comprehensive biotoxicity degradation treatment method for coking wastewater, based on the comprehensive biotoxicity degradation treatment equipment for coking wastewater in Embodiment 3, which differs from Embodiment 2 in that:

[0053] In step S3, the dosage of anaerobic bacteria is 650 PPM, and the anaerobic reaction time is 35 h; the dosage of aerobic bacteria is 450 PPM, and the aerobic reaction time is 42 h.

[0054] In step S4, the traction component 35 is used as follows: the traction motor 350 drives the drive gear 3500 to rotate, thereby causing the gear disk 353 and the driven gear 3520 to rotate simultaneously. The traction screw 352 connected to the driven gear 352 drives the connecting ring 351 to move downward along the equipment box 21. At this time, each guide rod 31 pulls the sealing disk 34 downward to seal the sealing hole on the drop plate 300.

[0055] The dosage of coagulant was 12 mg / L, and the coagulation time was 29 min.

[0056] Example 5

[0057] The difference between this embodiment and Embodiment 3 is that:

[0058] like Figure 1 , 5 As shown, two sliding sleeves 36 are slidably engaged on the drive screw 330. Four stirring rods 360 are movably hinged to the two sliding sleeves 36 in the circumferential direction. Each stirring rod 360 between the two sliding sleeves 36 is movably hinged in a corresponding manner, and a return torsion spring is provided at the hinge.

[0059] Example 6

[0060] This embodiment describes a comprehensive biotoxicity degradation treatment method for coking wastewater, based on the comprehensive biotoxicity degradation treatment equipment for coking wastewater in Embodiment 5, which differs from Embodiment 4 in that:

[0061] In step S3, the dosage of anaerobic bacteria is 750 PPM, and the anaerobic reaction time is 46 h; the dosage of aerobic bacteria is 550 PPM, and the aerobic reaction time is 50 h.

[0062] In step S4, as the lead screw 330 rotates, it drives each stirring rod 360 to rotate, thereby achieving the mixing of coking wastewater and treatment agents; while as the extrusion plate 32 moves, it pushes the two sliding sleeves 36 closer to each other, thereby changing the stirring path of the stirring rods 360.

[0063] The dosage of coagulant was 15 mg / L, and the coagulation time was 35 min.

[0064] Example 7

[0065] The difference between this implementation and Example 5 is that:

[0066] like Figure 1 , 2 As shown in Figure 3, a secondary separation screen 15 is fitted inside the processing box 10, located below the primary separation screen 11. The mesh diameter of the secondary separation screen 15 is smaller than that of the primary separation screen 11. A linkage gear 16 is fitted at one end of the lifting screw 13 near the top of the processing box 10. Four shafts 160 are equidistantly distributed between the primary separation screen 11 and the secondary separation screen 15. Each shaft 160 is equipped with a small gear 161 at a position corresponding to the primary separation screen 11 and the secondary separation screen 15. The pinion 161 at the top of the shaft 160 is meshed with the linkage gear 16; a rotating sleeve 17 is rotatably engaged with the pinion 161 by tooth pressure on both the primary separation screen 11 and the secondary separation screen 15; a cleaning scraper 170 is provided on the outer wall of each rotating sleeve 17; a collection sleeve 171 that communicates with the inside of the treatment box 10 is provided on the side wall of the treatment box 10 at a position corresponding to the primary separation screen 11 and the secondary separation screen 15, and the sewage pipe 101 is connected to the collection sleeve 171.

[0067] Example 8

[0068] This embodiment describes a comprehensive biotoxicity degradation treatment method for coking wastewater, based on the comprehensive biotoxicity degradation treatment equipment for coking wastewater in Embodiment 7, which differs from Embodiment 6 in that:

[0069] In step S2, the coking wastewater is filtered and separated by the primary separation screen 11 and the secondary separation screen 15 in sequence. At the same time, the lifting screw 13 rotates, which drives the linkage gear 16 to rotate, thereby causing the corresponding shaft 160 and pinion 161 to rotate, and driving the rotating sleeve 17 and the cleaning scraper 170 to rotate, removing the pollutants on the primary separation screen 11 and the secondary separation screen 15. The removed pollutants enter the collection sleeve 171 and are finally discharged through the sewage pipe 101.

[0070] Example 9

[0071] The difference between this embodiment and embodiment 7 is that:

[0072] like Figure 4 As shown, a filling groove 301 is provided inside the mesh cylinder 30; the mesh openings on the mesh cylinder 30 correspond to the positions of the filling groove 301.

[0073] like Figure 2 As shown, the equipment box 21 is equipped with a biogas collector 4 connected to the exhaust pipe 202.

[0074] Example 10

[0075] This embodiment describes a comprehensive biotoxicity degradation treatment method for coking wastewater, based on the comprehensive biotoxicity degradation treatment equipment for coking wastewater in Embodiment 9, which differs from Embodiment 8 in that:

[0076] In step S3, the biogas generated during the anaerobic and aerobic treatment of coking wastewater enters the biogas collector 4 through the exhaust pipe 202 for collection;

[0077] In step S4, activated carbon particles with a particle size of 1 to 3 mm are filled into the filling tank 301. When the sewage flows through the filling tank 301, the pollutants in the coking sewage are further degraded and purified by the adsorption effect of the activated carbon particles.

[0078] Example 11

[0079] The difference between this embodiment and embodiment 9 is that:

[0080] like Figure 1 As shown, a drain trough 121 is provided on the side wall of the lifting sleeve 12.

[0081] Example 12

[0082] This embodiment describes a comprehensive biotoxicity degradation treatment method for coking wastewater, based on the comprehensive biotoxicity degradation treatment equipment for coking wastewater in Embodiment 11, which differs from Embodiment 10 in that:

[0083] In step S2, when the coking wastewater rises inside the lifting sleeve 121 under the action of the lifting screw 13, the suspended pollutants in the wastewater are discharged through the sewage discharge trough 121.

[0084] It should be noted that the pretreatment motor 14, oxygen generator 22, extrusion motor 33, traction motor 350 and biogas collector 4 used in this invention all adopt existing technologies and are not specifically limited here. Appropriate products can be selected according to actual needs.

Claims

1. A comprehensive biotoxicity degradation treatment device for coking wastewater, characterized in that, The system includes a pretreatment component (1), an oxidation treatment component (2) located at the lower end of the pretreatment component (1), and a deep treatment component (3) located inside the oxidation treatment component (2). The pretreatment component (1) includes a treatment box (10), a primary separation screen plate (11) sleeved inside the treatment box (10) at an upper position, a lifting sleeve (12) located inside the treatment box (10) and penetrating the primary separation screen plate (11), a lifting screw (13) rotatably engaged inside the lifting sleeve (12), and a pretreatment motor (14) located at the top of the treatment box (10) and providing power to the lifting screw (13). A water inlet pipe (100) is provided on the side wall of the treatment box (10) and below the primary separation screen plate (11), and a sewage pipe (101) is provided above the primary separation screen plate (11). A water inlet trough (120) is provided at the bottom of the lifting sleeve (12), and a gap is reserved between the top of the lifting sleeve (12) and the top of the treatment box (10). The oxidation treatment assembly (2) includes an oxidation tank (20) located at the lower end of the treatment tank (10), an equipment box (21) located at the lower end of the oxidation tank (20), and an oxygen generator (22) located on the equipment box (21). The oxidation tank (20) is connected to the treatment tank (10) through a connecting pipe, and a control valve is provided on the connecting pipe. A dosing pipe (200), a cleaning cover (201), an exhaust pipe (202), and a clean water pipe (203) are provided on the side wall of the oxidation tank (20). A gas collecting sleeve (220) connected to the oxygen generator (22) is provided on the side wall of the oxidation tank (20) and below the dosing pipe (200). An aeration pipe (221) penetrating the oxidation tank (20) is provided inside the gas collecting sleeve (220). The deep processing component (3) includes a mesh cylinder (30) fitted inside the oxidation chamber (20), several guide rods (31) evenly distributed inside the mesh cylinder (30) and penetrating the equipment box (21), an extrusion plate (32) fitted inside the mesh cylinder (30) and slidably engaged with the guide rods (31), an extrusion motor (33) installed inside the equipment box (21) and providing power to the extrusion plate (32), and a densely packed device installed at the upper end of the mesh cylinder (30) and connected to the guide rods (31). The sealing disc (34) and the traction component (35) that provides power to the guide rod (31) are provided; the dosing pipe (200) and the aeration pipe (221) both pass through the mesh cylinder (30); the top of the mesh cylinder (30) is provided with a drop plate (300) that is connected to the inner wall of the oxidation tank (20), and the drop plate (300) is provided with a sealing hole that can be movably engaged with the sealing disc (34); the output end of the extrusion motor (33) is provided with a drive screw (330) that is threadedly connected to the extrusion plate (32). The traction component (35) includes a traction motor (350) disposed at the top of the equipment box (21), a connecting ring (351) disposed inside the equipment box (21) and connected to each of the guide rods (31), and several traction screws (352) equidistantly distributed inside the equipment box (21) and threadedly connected to the connecting rings (351); the output shaft of the traction motor (350) passes through the equipment box (21) and a drive gear (3500) is disposed on the output shaft, and a driven gear (3520) is sleeved on each of the traction screws (352); a gear disc (353) is rotatably engaged at the bottom of the equipment box (21) and meshes with the driven gear (3520) and the drive gear (3500) respectively. The processing box (10) is fitted with a secondary separation mesh plate (15) located below the primary separation mesh plate (11), and the mesh diameter of the secondary separation mesh plate (15) is smaller than that of the primary separation mesh plate (11). A linkage gear (16) is fitted at one end of the lifting screw (13) near the top of the processing box (10). Several shafts (160) are equidistantly distributed between the primary separation screen plate (11) and the secondary separation screen plate (15). A small gear (161) is provided on each shaft (160) at a position corresponding to the primary separation screen plate (11) and the secondary separation screen plate (15). The small gear (161) at the top of each shaft (160) meshes with the linkage gear (16). Both the primary separation screen plate (11) and the secondary separation screen plate (15) are rotatably engaged with rotating sleeves (17) that mesh with pinions (161) via tooth pressure; each of the rotating sleeves (17) is provided with a cleaning scraper (170) on its outer wall; each of the processing tanks (10) is provided with a collection sleeve (171) on its side wall, corresponding to the positions of the primary separation screen plate (11) and the secondary separation screen plate (15), which is connected to the inside of the processing tank (10); the sewage pipe (101) is connected to the collection sleeve (171); Two sliding sleeves (36) are slidably engaged on the drive screw (330). Several stirring rods (360) are movably hinged to the two sliding sleeves (36) in the circumferential direction. Each stirring rod (360) between the two sliding sleeves (36) is movably hinged in a one-to-one correspondence, and a reset torsion spring is provided at the hinge. The mesh cylinder (30) is provided with a filling groove (301) inside; the mesh holes on the mesh cylinder (30) correspond to the positions of the filling groove (301).

2. The integrated biotoxicity degradation treatment equipment for coking wastewater according to claim 1, characterized in that, The equipment box (21) is equipped with a biogas collector (4) connected to the exhaust pipe (202).

3. The integrated biotoxicity degradation treatment equipment for coking wastewater according to claim 1, characterized in that, A drain trough (121) is provided on the side wall of the lifting sleeve (12).

4. A method for comprehensive biotoxic degradation treatment of coking wastewater, based on the comprehensive biotoxic degradation treatment equipment for coking wastewater according to any one of claims 1-3, characterized in that, Includes the following steps: S1. Connect the pretreatment motor (14), oxygen generator (22), extrusion motor (33) and traction component (35) to an external power source respectively; S2. The coking wastewater to be treated is introduced into the treatment tank (10) through the inlet pipe (100). Then, the pretreatment motor (14) is started. The pretreatment motor (14) drives the lifting screw (13) to rotate. The coking wastewater is lifted by the lifting screw (13) and falls back into the lower end of the treatment tank (10) after being filtered by the primary separation screen (11). The impurities in the coking wastewater are filtered and separated by the primary separation screen (11). S3. Open the control valve on the connecting pipe to allow the pretreated coking wastewater to enter the oxidation tank (20). Then, anaerobic bacteria are introduced into the oxidation tank (20) through the dosing pipe (200) to allow the coking wastewater to undergo an anaerobic reaction with the anaerobic bacteria, thereby degrading the recalcitrant organic matter in the coking wastewater. Finally, aerobic bacteria are introduced into the oxidation tank (20) through the dosing pipe (200), and oxygen is introduced into the oxidation tank (20) through the oxygen generator (22). This allows the coking wastewater to undergo an aerobic reaction with the aerobic bacteria, thereby degrading the C-containing organic matter in the coking wastewater. The anaerobic bacteria are Bacillus licheniformis, with an addition amount of 500-750 PPM and an anaerobic reaction time of 25-46 h. The aerobic bacteria are Escherichia coli, with an addition amount of 350-550 PPM and an aerobic reaction time of 30-50 h. S4. Coagulant is added to the coking wastewater after curing treatment through the dosing pipe (200) and the wastewater reacts fully with the coagulant. Then, the sealing plate (34) and guide rod (31) are moved downward along the screen cylinder (30) by the traction component (35) to seal the sealing hole on the drop plate (300). Finally, the drive screw (330) is rotated by the extrusion motor (33) so that the extrusion plate (32) moves upward along the guide rod (31) and the coking wastewater is subjected to pressure filtration treatment. The filter water is discharged through the clear water pipe (203) and the filter cake is cleaned through the cleaning cover (201). The coagulant is polyacrylamide, the dosage of coagulant is 10~15mg / L, and the coagulation time is 20~35min.

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