Coking wastewater treatment equipment

Abstract

The utility model relates to the technical field of sewage treatment, in particular to coking wastewater treatment equipment. The coking wastewater treatment equipment comprises an adjusting tank, a hydrolysis acidification tank, a facultative unit, an aerobic tank and a mud-water separation unit which are connected in sequence, an outlet of the adjusting tank provided with a raw water pipeline is connected with the hydrolysis acidification tank; a first overflow pipe on the hydrolysis acidification pool is connected with the facultative unit; a second overflow pipe is arranged at an outlet of the facultative unit and is connected with the aerobic tank; a third overflow pipe on the aerobic tank is connected with the mud-water separation unit; the mud-water separation unit is connected with the water purification tank; a clean water outlet at the bottom of the clean water reservoir is connected with an external drain pipe. Sewage is sequentially subjected to regulation and storage, hydrolytic acidification, facultative microbiological treatment, aerobic microbiological treatment and mud-water separation, so that the water quality after sewage treatment can be ensured. The sewage is subjected to facultative and aerobic treatment after being hydrolyzed and acidified, so that the microbiological treatment efficiency is improved, the biological treatment time is shortened, and the treated water quality is more favorably ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a coking wastewater treatment device. Background Art

[0002] The components contained in the coal chemical coking wastewater are relatively complex, including many organic and inorganic substances. The inorganic substances are mainly sulfides, cyanides and other substances, while the organic substances contained therein mainly refer to aromatic hydrocarbon chemicals and phenolic substances, and also include heterocyclic substances such as sulfur, oxygen and nitrogen. Secondly, there are a large number of pollutants in the coal chemical coking wastewater, and it is difficult to degrade them. Because the wastewater contains a large amount of nitrogen oxides, the nitrogen source required for biological purification is excessive. The concentration of NH3-N in the coking wastewater can be as high as 500mg / L, the concentration of phenolic substances is as high as 700mg / L, and the concentration of COD is as high as 10000mg / L. The easily degradable organic matter in the coking wastewater is mainly phenolic compounds and benzene compounds. Pyrrolidine, naphthalene, furan, and imidazole are degradable organic matter, and the difficult-to-degrade organic matter mainly includes pyridine, carbazole, biphenyl, terphenyl, etc. At present, the technology for treating coal chemical coking wastewater in China mainly adopts biochemical method, which has a good removal effect on phenol and benzene substances in wastewater. However, some microbial treatment systems only perform simple treatment on the initial sewage, and then send it to the anoxic tank and aerobic tank for treatment. It is found in production that the design efficiency is not high enough, and the biological removal stage takes a long time.

[0003] For example, the Chinese patent application number: CN201020241502.0 discloses a complete denitrification treatment system for coking wastewater using a biofilm method, which specifically discloses "a complete denitrification treatment system for coking wastewater using a biofilm method, including a pretreatment device, a biochemical treatment device, a coagulation sedimentation treatment device, and a biochemical treatment device using a two-stage anoxic / aerobic device, including a primary anoxic tank, a primary aerobic tank, a return sedimentation tank, a secondary anoxic tank, and a secondary aerobic tank connected in sequence, a return water channel is provided between the return sedimentation tank and the primary anoxic tank, and a return sludge channel is provided between the return sedimentation tank and the primary aerobic tank; the secondary aerobic tank is connected to the secondary sedimentation tank, and a return sludge channel is provided between the secondary sedimentation tank and the secondary aerobic tank". It simply treats the sewage and then sends it to the anoxic tank and the aerobic tank for treatment. It is not efficient, the treatment effect is not good, and it takes a lot of time for biological removal. Utility Model Content

[0004] In view of this, the utility model aims to address the deficiencies of the prior art, and its main purpose is to provide a coking wastewater treatment equipment, which first performs hydrolysis and acidification treatment on the sewage before microbial treatment, which is beneficial to improving the microbial treatment efficiency and shortening the microbial treatment time, thereby overcoming the shortcomings of the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The present application provides a coking wastewater treatment device, comprising a regulating tank, a hydrolysis acidification tank, an anoxic unit, an aerobic tank, and a mud-water separation unit connected in sequence;

[0007] The inlet of the regulating tank is connected to the raw water pipeline; the outlet of the regulating tank is provided with a first pump, and the outlet of the first pump is connected to the hydrolysis acidification tank; the upper part of the hydrolysis acidification tank is provided with a first overflow pipe connected to the anoxic unit; the outlet of the anoxic unit is provided with a second overflow pipe connected to the inlet of the aerobic tank;

[0008] A third overflow pipe is provided on the upper part of the aerobic tank and is connected to the mud-water separation unit;

[0009] The outlet of the mud-water separation unit is connected to a second pump; the outlet of the second pump is connected to a clean water tank; the clean water outlet at the bottom of the clean water tank is connected to a third pump; and the outlet of the third pump is connected to an external drainage pipe.

[0010] Preferably, the anoxic unit comprises a first anoxic tank and a second anoxic tank, and a fourth overflow pipe is provided between the first anoxic tank and the second anoxic tank to connect them, so that water can overflow from the first anoxic tank to the second anoxic tank.

[0011] Preferably, the circulation outlet at the bottom of the second anoxic tank is connected to a circulation pipe, the starting end of the circulation pipe is connected to the bottom of the second anoxic tank, and the terminating end of the circulation pipe is connected to the top of the hydrolysis acidification tank; a fourth pump is provided on the circulation pipe, so the outlet of the fourth pump is provided with a first control valve.

[0012] Preferably, the mud-water separation unit includes a sedimentation tank, a mud-water separation tank and a sludge tank; the outlet of the sedimentation tank is connected to the inlet of the mud-water separation tank through a fifth overflow pipe; the bottom outlet of the mud-water separation tank is connected to the sludge tank; the outlet of the mud-water separation tank is connected to the inlet of the second pump.

[0013] Preferably, two sludge pumps are provided on the sludge pipe between the mud-water separation tank and the sludge tank; and the outlets and inlets of the two sludge pumps are connected in parallel.

[0014] Preferably, two third pumps are provided at the outlet of the water purification tank.

[0015] Preferably, the raw water pipe is provided with a pH detector and a temperature detector.

[0016] Preferably, the raw water pipeline is provided with a second control valve, and the second control valve is located on the downstream side of the pH detector and the temperature detector on the raw water pipeline.

[0017] Preferably, a monitoring pipe is connected to the raw water pipe; one end of the monitoring pipe is connected to the downstream side of the pH detector and the temperature detector and in front of the second control valve; the other end of the monitoring pipe is connected to the inlet of the monitoring pool.

[0018] Preferably, a fifth pump is provided at the outlet of the monitoring pool, and the outlet of the fifth pump is connected to the raw water pipeline.

[0019] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that the coking wastewater treatment equipment comprises a regulating tank, a hydrolysis and acidification tank, an anaerobic unit, an aerobic tank, and a mud-water separation unit connected in sequence. The sewage enters the regulating tank, the hydrolysis and acidification tank, the anaerobic unit, the aerobic tank, and the mud-water separation unit in sequence. The sewage enters the hydrolysis and acidification tank through the control of the regulating tank, and then enters the anaerobic unit and the aerobic tank in sequence. After the sewage is hydrolyzed and acidified, it is subjected to microbial treatment, which can greatly improve the treatment efficiency of microorganisms and shorten the biological treatment time. The circulation reflux between the second anaerobic tank and the hydrolysis and acidification tank can further adjust the inlet concentration of the hydrolysis and acidification tank and improve the treatment effect of the anaerobic tank. The raw water pipeline is provided with a monitoring pipeline connected to the monitoring tank, and the raw water with poor water quality is temporarily stored in the monitoring tank, thereby improving the operational flexibility of the coking wastewater treatment equipment for raw water. The mud-water separation unit can separate the treated sewage into mud and water to facilitate subsequent centralized treatment, which is more conducive to environmental protection.

[0020] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the flow chart of an embodiment of the utility model.

[0022] Figure 2 It is a top view schematic diagram of an aerobic pool according to an embodiment of the utility model.

[0023] Figure 3 It is a side view schematic diagram of an aerobic pool according to an embodiment of the utility model.

[0024] Description of the accompanying drawings:

[0025] 10. Regulating tank; 11. Raw water pipeline; 12. Second control valve; 13. First pump; 14. PH detector; 15. Temperature detector; 16. Monitoring pipeline; 17. Monitoring tank; 18. Fifth pump; 20. Hydrolysis acidification tank; 21. First overflow pipe; 22. First pipeline; 30. Oxygen-containing unit 31. Second overflow pipe; 32. First oxygen-containing tank; 33. Fourth overflow pipe; 34. Third pipeline; 35. Second oxygen-containing tank; 36. Circulation pipe; 37. Fourth pump; 38. First control valve; 40. Aerobic tank; 41. Third overflow pipe; 42. Sixth pump; 43. Membrane bioreactor; 44. Second pipeline; 50. Mud-water separation unit; 51. Second pump; 52. Sedimentation tank; 53. Fifth overflow pipe; 54. Mud-water separation tank; 55. Sludge tank; 56. Sludge pump; 57. Sludge pipe; 60. Clean water tank; 61. Third pump; 62. External drainage pipe. DETAILED DESCRIPTION

[0026] Please refer to Figure 1-3 As shown, it shows the specific structure of the preferred embodiment of the utility model, which is a coking wastewater treatment equipment.

[0027] Among them, coking wastewater is first subjected to hydrolysis and acidification treatment before biological treatment, which can greatly improve the biological treatment efficiency and shorten the biological treatment time.

[0028] The present application provides a coking wastewater treatment equipment, including a regulating tank 10, a hydrolysis acidification tank 20, an anaerobic unit 30, an aerobic tank 40, and a mud-water separation unit 50 connected in sequence. The regulating tank 10 is used to regulate the inlet and outlet flow rates. The hydrolysis acidification tank 20 is a method between aerobic and anaerobic treatment methods. Combining it with other aerobic, anaerobic and other processes can reduce the treatment cost and improve the treatment efficiency. The first anaerobic tank 32 and the second anaerobic tank 35 of the anaerobic unit 30 are sewage purification tanks with both anaerobic and aerobic microorganisms. The aerobic tank 40 is a link in the treatment of sewage, and its main function is to convert organic matter into inorganic matter. Aerobic microorganisms metabolize and decompose in the aerobic tank 40, oxidizing organic matter into harmless substances such as carbon dioxide, water and nitrides, thereby achieving the effect of purifying water quality. The mud-water separation unit 50 is used to separate the treated sludge and water.

[0029] The inlet of the regulating tank 10 is connected to the raw water pipeline 11; the outlet of the regulating tank 10 is provided with a first pump 13, and the outlet of the first pump 13 is connected to the hydrolysis acidification tank 20; the upper part of the hydrolysis acidification tank 20 is provided with a first overflow pipe 21 connected to the anoxic unit 30; the outlet of the anoxic unit 30 is provided with a second overflow pipe 31 connected to the inlet of the aerobic tank 40. The raw water pipeline 11 is preferably made of a stainless steel pipe or a corrosion-resistant plastic pipe. The initial sewage enters the regulating tank 10 for storage and treatment, and the first pump 13 pumps the sewage in the regulating tank to the hydrolysis acidification tank 20 for treatment. The hydrolysis acidification tank 20 is preferably one of a continuous hydrolysis acidification tank 20, an intermittent hydrolysis acidification tank 20, and a high-temperature hydrolysis acidification tank 20. In this embodiment, the hydrolysis acidification tank 20 is a continuous hydrolysis acidification tank 20. The sewage is first hydrolyzed and acidified, and then enters the anoxic unit 30 in sequence, and the aerobic tank 40 performs microbial treatment, which can greatly improve the subsequent microbial treatment efficiency and reduce the microbial treatment time. The hydrolysis acidification tank 20 can be directly connected to the first anoxic tank 32 of the anoxic unit 30 by a first pipe 22, and can be connected to the first anoxic tank 32 by a first overflow pipe 21, or the first pipe 22 and the first overflow pipe 21 are used at the same time. In this embodiment, it is preferred that the hydrolysis acidification tank 20 and the first anoxic tank 32 are connected by the first overflow pipe 21.

[0030] A third overflow pipe 41 is provided at the upper part of the aerobic tank 40 to be connected to the mud-water separation unit 50. At least one MBR membrane bioreactor 43 is provided inside the aerobic tank 40. There are two MBR membrane bioreactors 43 in this example, which are respectively connected to nutrient solution tanks. The sixth pump 42 pumps the nutrient solution to the membrane bioreactor. A third overflow pipe 41 can be provided at the upper part of the aerobic tank 40 to be connected to the mud-water separation unit 50, or the second pipeline 44 can be used to directly connect, or the third overflow pipe 41 and the second pipeline 44 can be connected at the same time.

[0031] The outlet of the mud-water separation unit 50 is connected to a second pump 51; the outlet of the second pump 51 is connected to a clean water tank 60; the clean water outlet at the bottom of the clean water tank 60 is connected to a third pump 61; the outlet of the third pump 61 is connected to an external drainage pipe 62. The mud-water separation unit 50 separates sludge and water, and the second pump 51 connected to the water outlet of the mud-water separation unit 50 pumps the treated water to the clean water tank 60. At the same time, the sludge pump 56 at the sludge outlet of the mud-water separation unit 50 transports the sludge to the sludge tank 55 for treatment.

[0032] Preferably, the oxygen-conducting unit 30 includes a first oxygen-conducting tank 32 and a second oxygen-conducting tank 35, and a fourth overflow pipe 33 is provided between the first oxygen-conducting tank 32 and the second oxygen-conducting tank 35 to connect them, so that water can overflow from the first oxygen-conducting tank 32 to the second oxygen-conducting tank 35. In this embodiment, the first oxygen-conducting tank 32 and the second oxygen-conducting tank 35 can be subjected to oxygen-conducting treatment twice, and the secondary oxygen-conducting reaction can effectively improve the treatment effect of the subsequent aerobic tank 40. The first oxygen-conducting tank 32 and the second oxygen-conducting tank 35 can be connected by a fourth overflow pipe 33, or by a third pipeline 34, or the fourth overflow pipe 33 and the third pipeline 34 can be used simultaneously.

[0033] Preferably, the circulation outlet at the bottom of the second oxygen-conducting tank 35 is connected to a circulation pipe 36, the starting end of the circulation pipe 36 is connected to the bottom of the second oxygen-conducting tank 35, and the terminal end of the circulation pipe 36 is connected to the top of the hydrolysis acidification tank 20; the circulation pipe 36 is provided with a fourth pump 37, so the outlet of the fourth pump 37 is provided with a first control valve 38. After the sewage undergoes two oxygen-conducting reactions, if it is detected that the water quality analysis of the treated sewage is not up to standard, the fourth pump 37 returns the sewage at the bottom of the second oxygen-conducting tank 35 from the circulation pipe 36 to the hydrolysis acidification tank 20. The operational flexibility of the oxygen-conducting unit is improved, and the treatment depth of the oxygen-conducting unit is increased. After such a cycle, the water quality of the sewage after oxygen-conducting treatment can be thoroughly guaranteed, which is convenient for subsequent aerobic treatment.

[0034] Preferably, the mud-water separation unit 50 includes a sedimentation tank 52, a mud-water separation tank 54 and a sludge tank 55; the outlet of the sedimentation tank 52 is connected to the inlet of the mud-water separation tank 54 through a fifth overflow pipe 53; the bottom outlet of the mud-water separation tank 54 is connected to the sludge tank 55; the outlet of the mud-water separation tank 54 is connected to the inlet of the second pump 51. The sedimentation tank 52 is a structure that uses sedimentation to remove suspended matter in water and is a device for purifying water quality. The mud-water separation tank 54 is used to separate sludge and water. The sludge tank 55 is used to treat the separated sludge. The sedimentation tank 52 is connected to the inlet of the mud-water separation tank 54 through a fifth overflow pipe 53, and the mud-water separation tank 54 separates the sewage from mud and water. The clean water separated and treated by the mud-water separation tank 54 is pumped to the clean water tank 60 by the second pump 51. Among them, the mud-water separation tank 54 is one of a filtration-type mud-water separation tank 54, a gravity-type mud-water separation tank 54, and a centrifugal mud-water separation type. The present embodiment preferably uses a filtration-type mud-water separation tank 54, using a filter element as the filter material. The sedimentation tank 52 is one of a horizontal flow type, a vertical flow type, a radial flow type, and an oblique flow type. The present embodiment preferably uses a vertical flow type or an oblique flow type sedimentation tank 52. The sludge tank 55 is one of a gravity sludge thickening tank, a mechanical sludge thickening tank, a centrifugal sludge thickening tank, and a filter press thickening tank. In the present embodiment, the sludge tank 55 is a mechanical sludge thickening tank.

[0035] Preferably, two sludge pumps 56 are provided on the sludge pipe 57 between the mud-water separation tank 54 and the sludge tank 55; the outlets and inlets of the two sludge pumps 56 are connected in parallel, and the two sludge pumps 56 can be operated separately or simultaneously to increase the sludge conveying capacity. The sludge pump 56 is a conveying machine used to discharge sludge with high viscosity. The sludge pump 56 is generally used to convey sludge before dehydration treatment. For sludge dehydrated by a filter press, a screw pump is generally used for conveying. The sludge pump 56 can convey the sludge coming out of the mud-water separation tank 54 to the sludge tank 55 through the sludge pipe 57, and can also squeeze and dehydrate the sludge. Under normal working conditions, the two sludge pumps 56 are in operation and one is in standby. When one sludge pump 56 fails, it switches to the standby pump, which has high reliability, continuous operation, and large production capacity.

[0036] Preferably, two third pumps 61 are arranged at the outlet of the water purification tank 60, which can deliver the purified water in the water purification tank 60 to a river or a fixed pool for storage. The inlets and outlets of the two third pumps 61 are respectively arranged in parallel, one is on and the other is on standby, and when the sewage treatment volume is large, a dual pump operation mode is adopted to increase the delivery volume, with high reliability and large sewage treatment capacity.

[0037] Preferably, the raw water pipe is provided with a pH detector 14 and a temperature detector 15. The pH detector 14 is an instrument for measuring the feedback acidity and alkalinity, and the temperature detector 15 is a detection device widely used in industrial production, which can be used to monitor the temperature of sewage in real time. The pH value and temperature of the raw sewage are monitored, which is very convenient for adjusting the subsequent sewage treatment parameters and is conducive to improving the sewage treatment efficiency.

[0038] Preferably, the raw water pipeline 11 is provided with a second control valve 12, and the second control valve 12 is located on the downstream side of the PH detector 14 and the temperature detector 15 on the raw water pipeline 11. Through this design, the sensors of the PH detector 14 and the temperature detector 15 obtain the sewage data in real time. When the sewage data is found to be abnormal, which affects the operation of the subsequent hydrolysis acidification tank 20, the second control valve 12 is closed, and the sewage can stop entering the coking wastewater treatment equipment, thereby reducing the impact of the deterioration of raw water quality on the coking wastewater treatment equipment.

[0039] Preferably, the raw water pipeline 11 is connected with a monitoring pipeline 16; one end of the monitoring pipeline 16 is connected to the downstream side of the pH detector 14 and the temperature detector 15, and before the second control valve 12; the other end of the monitoring pipeline 16 is connected to the inlet of the monitoring tank 17. The outlet of the monitoring tank 17 is provided with a fifth pump 18, and the outlet of the fifth pump 18 is connected to the raw water pipeline 11. The original sewage can enter the monitoring tank 17 from the monitoring pipeline 16, and the fifth pump 18 can pump the sewage in the monitoring tank 17 to the raw water pipeline 11, and then enter the regulating tank 10. The monitoring pipeline 16 is provided with a third control valve. After the third control valve is opened, the original sewage enters the monitoring tank 17 through the monitoring pipeline 16. The monitoring tank 17 is used to store raw sewage with poor water quality, such as sewage hardness, COD, SS, ammonia nitrogen and total phosphorus content exceeding the standard. The pH detector 14 and the temperature detector 15 on the raw water pipeline 11 detect that the water quality index exceeds the control range, so as to avoid affecting the water quality in the regulating tank 10. At this time, the second control valve 12 is closed, the raw sewage stops entering the regulating tank 10, and the third control valve is opened, and the raw sewage enters the monitoring tank 17 for monitoring. After the raw sewage quality improves, the second control valve 12 is opened again, the regulating tank 10 restarts to treat the sewage, and the third control valve is closed. In order to treat the sewage inside the monitoring tank 17, the fifth pump 18 is started, and the sewage in the monitoring tank 17 is pressurized by the fifth pump 18 and transported to the regulating tank 10 through the outlet pipe of the fifth pump 18. The sewage in the monitoring tank 17 and the sewage in the raw water pipeline 11 merge into the regulating tank 10 to reduce the impact of the sewage with unqualified water quality inside the monitoring tank 17 entering the regulating tank 10 on the downstream equipment.

[0040] In summary, the design focus of the utility model is that the sewage is sequentially passed through the regulating tank 10, the hydrolysis and acidification tank 20, the anoxic unit 30, the aerobic tank 40, and the mud-water separation unit 50, and storage, hydrolysis and acidification, anoxic microbial treatment, aerobic microbial treatment, and mud-water separation are performed accordingly, which can ensure the water quality of the sewage after treatment. In particular, after the sewage is hydrolyzed and acidified, anoxic and aerobic microbial treatment is performed, which can greatly improve the treatment efficiency of microorganisms and shorten the biological treatment time. The mud-water separation unit 50 can separate the mud and water of the treated sewage to facilitate subsequent centralized treatment, which is more conducive to ensuring the quality of the treated water. A secondary anoxic unit 30 is provided to improve the anoxic effect, and a circulation reflux is added between the second anoxic tank 35 and the hydrolysis and acidification tank 20 to enhance the anoxic effect. A pipeline is set on the raw water pipeline 11 to enter the monitoring tank 17. The raw sewage exceeding the standard enters the monitoring tank 17, and is subsequently mixed with the raw sewage meeting the monitoring index and enters the regulating tank 10, so as to improve the operational flexibility of the coking wastewater treatment equipment for raw water and sewage.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A coking wastewater treatment equipment, characterized in that: It includes a regulating tank, a hydrolysis acidification tank, an anoxic unit, an aerobic tank, and a mud-water separation unit connected in sequence; The inlet of the regulating tank is connected to the raw water pipeline; the outlet of the regulating tank is provided with a first pump, and the outlet of the first pump is connected to the hydrolysis acidification tank; the upper part of the hydrolysis acidification tank is provided with a first overflow pipe connected to the anoxic unit; the outlet of the anoxic unit is provided with a second overflow pipe connected to the inlet of the aerobic tank; A third overflow pipe is provided on the upper part of the aerobic tank and is connected to the mud-water separation unit; The outlet of the mud-water separation unit is connected to a second pump; the outlet of the second pump is connected to a clean water tank; the clean water outlet at the bottom of the clean water tank is connected to a third pump; and the outlet of the third pump is connected to an external drainage pipe.

2. The coking wastewater treatment equipment according to claim 1, characterized in that: The oxygen-conducting unit comprises a first oxygen-conducting tank and a second oxygen-conducting tank. A fourth overflow pipe is arranged between the first oxygen-conducting tank and the second oxygen-conducting tank to connect them. Water can overflow from the first oxygen-conducting tank to the second oxygen-conducting tank.

3. The coking wastewater treatment equipment according to claim 2, characterized in that: The circulation outlet at the bottom of the second aerobic tank is connected to a circulation pipe, the starting end of the circulation pipe is connected to the bottom of the second aerobic tank, and the ending end of the circulation pipe is connected to the top of the hydrolysis acidification tank; a fourth pump is provided on the circulation pipe, so the outlet of the fourth pump is provided with a first control valve.

4. The coking wastewater treatment equipment according to claim 1, characterized in that: The mud-water separation unit includes a sedimentation tank, a mud-water separation tank and a sludge tank; the outlet of the sedimentation tank is connected to the inlet of the mud-water separation tank through a fifth overflow pipe; the bottom outlet of the mud-water separation tank is connected to the sludge tank; the outlet of the mud-water separation tank is connected to the inlet of the second pump.

5. The coking wastewater treatment equipment according to claim 4, characterized in that: Two sludge pumps are arranged on the sludge pipe between the mud-water separation tank and the sludge tank; the outlets and inlets of the two sludge pumps are connected in parallel.

6. The coking wastewater treatment equipment according to claim 1, characterized in that: Two third pumps are arranged at the outlet of the clean water tank.

7. The coking wastewater treatment equipment according to claim 1, characterized in that: The raw water pipe is provided with a pH detector and a temperature detector.

8. The coking wastewater treatment equipment according to claim 7, characterized in that: The raw water pipeline is provided with a second control valve, and the second control valve is located on the downstream side of the pH detector and the temperature detector on the raw water pipeline.

9. The coking wastewater treatment equipment according to claim 8, characterized in that: The raw water pipeline is connected with a monitoring pipeline; one end of the monitoring pipeline is connected to the downstream side of the pH detector and the temperature detector and in front of the second control valve; the other end of the monitoring pipeline is connected to the inlet of the monitoring pool.

10. The coking wastewater treatment equipment according to claim 9, characterized in that: A fifth pump is provided at the outlet of the monitoring pool, and the outlet of the fifth pump is connected to the raw water pipeline.

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