Intensive treatment device for coking phenol-cyanogen wastewater

Abstract

The utility model provides an intensive treatment device for coking phenol-cyanogen wastewater, which belongs to the technical field of coking wastewater treatment and comprises an oil separation tank, an air floatation room, an adjusting tank, an accident tank, two parallel anoxic tanks, an aerobic tank, a secondary sedimentation tank, a coagulative precipitation tank, a fluidized bed, a coagulative reaction tank and an equipment room, the two parallel aerobic tanks are respectively arranged on the two sides of the equipment room, and the two parallel secondary sedimentation tanks are respectively arranged on the two sides of the equipment room; the oil separation tank, the air floatation chamber, the adjusting tank, the accident tank, the fluidized bed, the coagulation reaction tank and the coagulation sedimentation tank are distributed on the two sides of the equipment chamber respectively; the treatment device is also provided with two parallel tertiary sedimentation tanks, and the two tertiary sedimentation tanks are respectively arranged on two sides of the equipment room. The coking phenol-cyanogen wastewater treatment is intensively arranged, so that the occupied area can be saved by about 20%, and meanwhile, civil engineering, pipeline and cable investments are saved.

Description

Technical Field

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

[0002] Currently, the general process for coking phenolic cyan wastewater treatment projects is oil separation tank + air flotation + regulating tank + anoxic tank + aerobic tank + secondary sedimentation tank + fluidized bed / coagulation reaction + coagulation sedimentation tank process. Generally, the oil separation tank and the air flotation tank are separately arranged or combined with the AO tank. The secondary sedimentation tank and the coagulation sedimentation tank are mostly independently constructed as circular radial flow sedimentation tanks, resulting in a scattered overall layout of the project and a large floor area (as shown in the existing coking phenolic cyan wastewater treatment device in the attached Figure 1 figure); there is a large head loss in the elevation layout. Generally, a lift pump must be added for the effluent of the coagulation sedimentation tank to the next-level medium-depth water treatment system; the radial flow sedimentation tank needs to be equipped with a sludge scraper, with a large equipment investment and maintenance volume; the suspended solids in the effluent of the secondary sedimentation tank are relatively high, increasing the dosage of water purification agents added to the fluidized bed and resulting in high operating costs; the solution water of the water purification agent / coagulant uniformly uses tap water and reclaimed intermediate water, and the separate utilization of wastewater cannot be achieved, which is not conducive to water conservation and consumption reduction (as shown in the operating process flow of the existing coking phenolic cyan wastewater treatment device in the attached Figure 2 figure). Content of the Utility Model

[0003] In view of the above problems, the utility model provides a coking phenolic cyan wastewater intensive treatment device to solve the technical problems such as the scattered overall layout and large floor area of the existing treatment device.

[0004] To achieve the above object, the technical solution of the utility model is: a coking phenolic cyan wastewater intensive treatment device, including an oil separation tank 1, a regulating tank 3, an accident tank 4, an anoxic tank 6, an aerobic tank 7, a secondary sedimentation tank 8, a coagulation sedimentation tank 10, a fluidized bed 12, a coagulation reaction tank 13 and an equipment room 19. The two anoxic tanks 6 are arranged in parallel and are respectively arranged on both sides of the equipment room 19. The two aerobic tanks 7 are arranged in parallel and are respectively arranged on both sides of the equipment room 19. The two secondary sedimentation tanks 8 are arranged in parallel and are respectively arranged on both sides of the equipment room 19. The oil separation tank 1, the regulating tank 3, the accident tank 4, the fluidized bed 12, the coagulation reaction tank 13 and the coagulation sedimentation tank 10 each have one and are distributed on both sides of the equipment room 19;

[0005] The treatment device also has two tertiary sedimentation tanks 14 arranged in parallel, and the two tertiary sedimentation tanks 14 are respectively arranged on both sides of the equipment room 19;

[0006] The coking phenolic cyan wastewater flows sequentially through the anoxic tank 6, the aerobic tank 7, the secondary sedimentation tank 8 and the tertiary sedimentation tank 14 on the same side of the equipment room 19. The tertiary sedimentation tanks 14 on both sides of the equipment room 19 are both connected to the fluidized bed 12;

[0007] The regulating tank 3 is connected to both of the two anoxic tanks 6, and an emergency tank 4 is arranged at the other side position of the equipment room 19 corresponding to the regulating tank 3;

[0008] A flotation room / drug addition room 16 is arranged at the position on the same side of the equipment room 19 as the regulating tank 3. The flotation room / drug addition room 16 is arranged in two layers up and down. The upper layer is a flotation room and the lower layer is a drug addition room 9. The regulating tank 3 is connected to the flotation room. The flotation room is also connected to the oil separation tank 1 and both are on the same side of the equipment room 19;

[0009] Both the secondary sedimentation tank 8 and the tertiary sedimentation tank 14 are provided with sludge discharge pipelines and sludge return pipelines. The sludge discharge pipeline is connected to the sludge thickening tank at the end of the treatment device, and the sludge return pipeline is connected to the aerobic tank 7.

[0010] Further, the coking phenol-cyanide wastewater after passing through the tertiary sedimentation tank (14) flows through the fluidized bed 12, the coagulation reaction tank 13 and the coagulation sedimentation tank 10 in sequence; the coagulation sedimentation tank 10 is also provided with a sludge discharge pipeline connected to the sludge thickening tank, and the coagulation sedimentation tank 10 is also provided with a sludge return pipeline connected to the coagulation reaction tank 13.

[0011] Further, the secondary sedimentation tank 8 is a vertical flow sedimentation tank.

[0012] Further, the tertiary sedimentation tank 14 is an inclined tube sedimentation tank.

[0013] Further, a flocculation water distribution tank 15 for adding flocculant to the tertiary sedimentation tank 14 is also arranged between the tertiary sedimentation tank 14 and the secondary sedimentation tank 8.

[0014] Further, inclined tube fillers are installed in the coagulation sedimentation tank 10.

[0015] Further, water pumps required for each functional area of the treatment device are arranged in the equipment room 19.

[0016] Further, a clear water tank 11 is also arranged at a position adjacent to the coagulation sedimentation tank 10, and a drug addition room 9 is also arranged at a position adjacent to the clear water tank 11. A soda ash dissolving tank 17 and a water purification agent dissolving tank 18 are arranged in the drug addition room 9; the clear water tank 11, the soda ash dissolving tank 17 and the water purification agent dissolving tank 18 are all on the same side of the equipment room 19 as the coagulation sedimentation tank 10.

[0017] Further, a low-level water collecting pit is arranged at the overflow weir of the secondary sedimentation tank 8 and is connected to the soda ash dissolving tank 17 through a pipeline; a low-level water collecting pit is also arranged at the overflow weir of the coagulation sedimentation tank 10 and is connected to the water purification agent dissolving tank 18 through a pipeline.

[0018] Further, during the operation of the processing device, the water depth of the anoxic tank 6 and the aerobic tank 7 is ≥ 6 m; the total tank depth of the fluidized bed 12, the coagulation reaction tank 13, and the coagulation sedimentation tank 10 is ≥ 6.4 m and the liquid levels of the three are the same, and are all 0.3 - 0.4 m lower than the liquid level of the tertiary sedimentation tank 14; the liquid level of the secondary sedimentation tank 8 is flush with the liquid level of the aerobic tank 7; the liquid level of the tertiary sedimentation tank 14 is 0.3 - 0.4 m lower than the liquid level of the secondary sedimentation tank 8; the highest liquid level of the clear water tank 11 is 0.3 - 0.4 m lower than the liquid level of the coagulation sedimentation tank 10, and the depth of the highest liquid level of the clear water tank 11 is 5.1 - 4.8 m.

[0019] The beneficial effects of a coking phenol-cyanide wastewater intensive treatment device of the present utility model are as follows:

[0020] The intensive layout of the coking phenol-cyanide wastewater treatment of the present utility model can save about 20% of the land area, and at the same time save the investment in civil engineering, pipelines, and cables;

[0021] The present utility model has a small elevation loss, saving the head of the reverse-lifting sludge return device; the system has a relatively high effluent elevation, and can achieve self-flow effluent into the next level, eliminating the need for a primary water pump lift. Therefore, a large amount of energy consumption can be saved;

[0022] A flocculation water distribution pool is arranged at the tertiary sedimentation tank. Adding a flocculant at the tertiary sedimentation tank removes most of the suspended solids and colloids, improving the adsorption efficiency of the water purification agent in the subsequent fluidized bed unit and saving the dosage of the water purification agent; adding flocculants at two levels of the tertiary sedimentation tank and the coagulation sedimentation tank will also reduce the total dosage of the flocculant compared with adding it at one level, reducing the chemical agent cost from two aspects.

[0023] The intensive layout of the soda ash and water purification agent dosing rooms and the water tanks of the present utility model is convenient for connecting the self-flow pipelines, enabling the water for dissolving the water purification agent to use the effluent from the tertiary sedimentation tank, and the water for dissolving the soda ash to use the effluent from the coagulation sedimentation tank, realizing the separate use of process water quality and saving the consumption of the water for dissolving the agent. Description of the Drawings

[0024] The following further elaborates on the present utility model in detail in conjunction with the drawings and specific embodiments.

[0025] Figure 1 is a schematic plan view of the coking phenol-cyanide wastewater treatment device in the prior art;

[0026] Figure 2 is a process flow chart of the coking phenol-cyanide wastewater treatment device in the prior art;

[0027] Figure 3 is a process flow chart of the intensive treatment device of the present utility model;

[0028] Figure 4 is a schematic plan view of the intensive treatment device of the present utility model.

[0029] Description of Reference Numerals

[0030] 1- Grease trap, 2- Air flotation room, 3- Regulating tank, 4- Accident tank, 5- Pump room, 6- Anoxic tank, 7- Aerobic tank, 8- Secondary sedimentation tank, 9- Dosing room, 10- Coagulation sedimentation tank, 11- Clear water tank, 12- Fluidized bed, 13- Coagulation reaction tank, 14- Tertiary sedimentation tank, 15- Flocculation water tank, 16- Air flotation room / Dosing room, 17- Soda ash dissolving tank, 18- Water purifier dissolving tank, 19- Equipment room. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0032] Combination Figure 3 and Figure 4 As shown, a coking phenol-cyanide wastewater intensive treatment device is divided into two combined water tanks as a whole, and a main equipment room is built between the two water tanks at an appropriate distance; the main biochemical tank (anoxic tank 6, aerobic tank 7) is arranged in two parallel systems; the pretreatment system (oil separator 1, flotation room 2, regulating tank 3, accident tank 4) and the post-treatment system (fluidized bed 12, coagulation reaction tank 13, coagulation sedimentation tank 10) are arranged in a single system, and are distributed on both sides of the main equipment room based on the construction of the main biochemical tank according to the specific situation. The innovation of the utility model mainly lies in the re-optimization of the positions of the reaction tanks, equipment rooms, etc. used in various stages of the existing coking phenol-cyanide wastewater treatment, and the change of the connection mode between the reaction tanks, equipment rooms, etc. after the optimized arrangement. The reaction tanks (such as anoxic tanks, aerobic tanks, oil separators, flotation rooms, regulating tanks, accident tanks, fluidized beds, coagulation reaction tanks, coagulation sedimentation tanks, etc.) and equipment rooms (such as pump rooms, etc.) involved have the same functions as those in the prior art, and the internal structures are basically the same (the differences are described in detail below), and the methods of use are also basically the same. Therefore, the contents that are the same as the prior art will not be repeated here.

[0033] Specifically, it includes a grease trap 1, a regulating tank 3, an accident tank 4, an anoxic tank 6, an aerobic tank 7, a secondary sedimentation tank 8, a coagulation sedimentation tank 10, a fluidized bed 12, a coagulation reaction tank 13 and an equipment room 19, wherein the anoxic tanks 6 are two parallel and respectively arranged on both sides of the equipment room 19, the aerobic tanks 7 are two parallel and respectively arranged on both sides of the equipment room 19, and the secondary sedimentation tanks 8 are two parallel and respectively arranged on both sides of the equipment room 19; the grease trap 1, the regulating tank 3, the accident tank 4, the fluidized bed 12, the coagulation reaction tank 13 and the coagulation sedimentation tank 10 are each provided with one and distributed on both sides of the equipment room 19;

[0034] The processing device is also provided with two parallel three-sedimentation tanks 14, and the two three-sedimentation tanks 14 are respectively arranged on both sides of the equipment room 19;

[0035] The coking phenol-cyanide wastewater flows sequentially through the anoxic tank 6, aerobic tank 7, secondary sedimentation tank 8 and tertiary sedimentation tank 14 located on the same side of the equipment room 19. The tertiary sedimentation tanks 14 located on both sides of the equipment room 19 are connected to the fluidized bed 12 through pipes; the two water flows are combined into one, and a water purifier is added to the fluidized bed 12. Since most of the suspended matter and colloids are removed in the tertiary sedimentation tank 14, the adsorption efficiency of the water purifier is improved, and the amount of the water purifier is saved.

[0036] The regulating pool 3 is connected to the two anoxic pools 6 through pipelines, and an accident pool 4 is arranged on the other side of the equipment room 19 corresponding to the regulating pool 3 (that is, the regulating pool 3 and the accident pool 4 are arranged symmetrically relative to the equipment room 19);

[0037] An air flotation room / dosing room 16 is arranged on the same side of the regulating tank 3 as the equipment room 19. The air flotation room / dosing room 16 is arranged in two layers, the upper layer is the air flotation room 2 (in Figure 4 Not marked in the middle), the lower floor is a dosing room 9 (in Figure 4 Not marked), the regulating tank 3 is connected to the air flotation room 2, and the air flotation room 2 is also connected to the grease trap 1 and the two are located on the same side of the equipment room 19;

[0038] The secondary sedimentation tank 8 and the tertiary sedimentation tank 14 are both provided with a sludge discharge pipeline and a sludge return pipeline. The sludge discharge pipeline is connected to the sludge concentration tank at the end of the treatment device, and the sludge return pipeline is connected to the aerobic tank 7. Under normal operation, all the sludge in the secondary sedimentation tank 8 is returned, and a small amount is discharged; because the amount of suspended matter entering the tertiary sedimentation tank 14 is lower than the required residual sludge discharge amount of the biochemical system, under normal conditions, the sludge in the tertiary sedimentation tank 14 can be completely discharged without return (reserving a return pipeline can make the operation mode more flexible). The higher surface load of the secondary sedimentation tank 8 can screen out the aged sludge that is not easy to precipitate, and then add drugs to the tertiary sedimentation tank 14 for flocculation and precipitation, thereby screening out the aged sludge from the system and improving the sludge activity of the main biochemical system.

[0039] Further, the coking phenol-cyanide wastewater after the tertiary sedimentation tank (14) flows successively through the fluidized bed 12, the coagulation reaction tank 13, and the coagulation sedimentation tank 10; the coagulation sedimentation tank 10 is also provided with a sludge discharge pipeline communicating with the sludge thickening tank, and the coagulation sedimentation tank 10 is also provided with a sludge return pipeline communicating with the coagulation reaction tank 13. The effluent from the fluidized bed 12 enters the coagulation reaction tank 13, and after adding a flocculant and a coagulant aid, it enters the coagulation sedimentation tank 10. Inclined tube fillers are installed in the coagulation sedimentation tank 10 (the inclined tube fillers are prior art, and the material can be selected from any one of PP, PVC, and FRP. The main function is to be used for the precipitation of the wastewater in the coagulation sedimentation tank 10; the installation method can adopt the method in the prior art, and the horizontal angle between the inclined tube fillers and the bottom of the coagulation sedimentation tank 10 can be set to 60°), and a center-driven thickening sludge scraper (which is also prior art, and the model can be selected as the BYZXN type center-driven thickening (sludge scraping) machine) is provided, which improves the residence time and concentration degree of the bottom sludge; part of the sludge in the coagulation sedimentation tank 10 is returned to the coagulation reaction tank 13 to make full use of the performance of the medicament, save the addition of the medicament, and part of the sludge in the coagulation sedimentation tank 10 is discharged.

[0040] Further, the secondary sedimentation tank 8 is a vertical flow sedimentation tank (prior art, and its structure will not be described in detail), and the tertiary sedimentation tank 14 is an inclined tube sedimentation tank (prior art, and its structure will not be described in detail). When the device is operating, the surface load is controlled at about 1.0 - 1.5 m 3 / (m 2 ·h). Relying on the large pool depth condition of the aerobic tank 7, a large-angle sludge hopper is provided at the bottom to collect sludge, and the angle is 50 - 60 degrees, without the need for a traditional secondary sedimentation sludge scraper. After the mixed liquid enters the secondary sedimentation tank 8, most of the activated sludge precipitates, and the small, broken, and aged sludge flocs that are not easy to precipitate flow out with the water (the suspended solids are about 150 - 300 mg / L, depending on the specific project) and enter the tertiary sedimentation tank 14;

[0041] Further, a flocculation water distribution tank 15 (i.e., a water tank) for adding a flocculant to the tertiary sedimentation tank is also provided between the tertiary sedimentation tank 14 and the secondary sedimentation tank 8. Adding a flocculant helps the suspended solids and colloids to precipitate, and the effluent suspended solids are less than 50 mg / L.

[0042] Further, pumps required for each functional area of the treatment device and other required equipment are provided in the equipment room 19.

[0043] Further, a clear water tank 11 is also provided at a position adjacent to the coagulation sedimentation tank 10, and a chemical dosing room 9 is provided at a position adjacent to the clear water tank 11. A soda ash dissolving tank 17 and a water purifying agent dissolving tank 18 are provided in the chemical dosing room 9; the clear water tank 11, the soda ash dissolving tank 17, and the water purifying agent dissolving tank 18 are all on the same side of the equipment room 19 as the coagulation sedimentation tank 10.

[0044] Furthermore, a low-level water collection pit is provided at the overflow weir of the secondary sedimentation tank 8 (the structure of this low-level water collection pit is not specifically limited, as long as it can collect the water at the overflow weir of the secondary sedimentation tank 8), and it is connected to the soda ash chemical dosing tank 17 through a pipeline; a low-level water collection pit is also provided at the overflow weir of the coagulation sedimentation tank 10, and it is connected to the flocculant chemical dosing tank 18 through a pipeline. The soda ash chemical dosing tank 17 and the flocculant chemical dosing tank 18 are arranged close to the tertiary sedimentation tank 14 and the coagulation sedimentation tank 10. For soda ash chemical dosing, the effluent from the secondary sedimentation tank 8 can be used. A low-level water collection pit is provided at the overflow weir of the secondary sedimentation tank 8 and is led to the soda ash chemical dosing tank 17 through a pipeline, and an electric valve is installed; for flocculant chemical dosing, the effluent from the coagulation sedimentation tank 10 can be used. A low-level water collection pit is provided at the overflow weir of the coagulation sedimentation tank 10 (the structure of this low-level water collection pit is not specifically limited, as long as it can collect the water at the overflow weir of the coagulation sedimentation tank 10) and is led to the flocculant chemical dosing tank 18 through a pipeline, and an electric valve is installed; together with the batching bin, automatic chemical dosing can be achieved.

[0045] Furthermore, during the operation of the treatment device, in terms of elevation, due to the combined construction of each unit, pipeline connection is avoided, and elevation loss can be effectively reduced. The depth of the main biochemical tank is ≥6m, and the total depth of the post-treatment system is controlled at ≥6.4m. The liquid level of the secondary sedimentation tank 8 is controlled to be flush with the aerobic tank 7; the liquid level of the tertiary sedimentation tank 14 is controlled to be 0.3 - 0.4m lower than that of the secondary sedimentation tank 8; the fluidized bed 12, the coagulation reaction tank 13, and the coagulation sedimentation tank 10 can basically maintain the same liquid level, which is 0.3 - 0.4m lower than that of the tertiary sedimentation tank 14; the highest liquid level of the clear water tank 11 is 0.3 - 0.4m lower than that of the coagulation sedimentation tank 10. The highest liquid level depth of the clear water tank 11 is about 5.1 - 4.8m. Combined with the design of the reclaimed water system, it can generally overflow to the reclaimed water reuse treatment system under normal circumstances, eliminating one-time lifting and saving a large amount of power consumption. At the same time, the lower elevation difference can reduce the head of the sludge return pump and save power consumption.

[0046] For the treatment device of the present utility model, (1) the two-stage anoxic tanks 6, aerobic tanks 7, and secondary / tertiary sedimentation systems are basically symmetrically arranged, and the fluidized bed 12 / coagulation reaction tank 13 - coagulation sedimentation tank 10 - clear water tank 11 are arranged on one side. The remaining space can be used to deploy structures such as the oil separation tank 1, the flotation room 2, and the chemical dosing room 9. There is a large equipment room between two structures. All pumps in the biochemical section are in this equipment room. The intensive layout saves about 10 - 20% of the land area compared with the traditional decentralized layout.

[0047] (2) The intensive planar layout makes it easier to arrange large-flow return systems such as air lift pumps and axial flow pumps in the biochemical system.

[0048] (3) Two-stage sedimentation in the secondary and tertiary sedimentation tanks, with a relatively high surface load setting, can screen out aged sludge and improve the sludge activity of the main biochemical tank.

[0049] (4) The addition of flocculant in the tertiary sedimentation tank 14 results in lower suspended solids and colloids in the effluent, improving the adsorption efficiency of the water purification agent in the subsequent fluidized bed unit and saving the dosage of the water purification agent; the two-stage addition of flocculant in the tertiary sedimentation tank 14 and the coagulation sedimentation tank 10 can reduce the total dosage of flocculant compared with the single-stage addition, reducing the chemical agent cost from two aspects.

[0050] (5) Small elevation loss. It saves the head of the sludge return pump for reverse lifting, and the system effluent can flow out by itself, eliminating the need for a primary water pump lift and saving a large amount of power consumption.

[0051] (6) The secondary sedimentation tank 8 adopts the vertical flow and inclined tube forms, eliminating the sludge scraper of the original circular radial sedimentation tank, reducing the energy consumption and maintenance cost of electric mechanical equipment.

[0052] (7) The intensive layout enables the use of the effluent from the tertiary sedimentation tank 14 for the dissolution water of the water purification agent nearby and the effluent from the coagulation sedimentation tank 10 for the dissolution water of soda ash nearby, realizing the separate use of process water quality and saving the consumption of dissolution water.

[0053] Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.

Claims

1. An intensive treatment device for coking phenol-cyanide wastewater, comprising an oil separation tank (1), an adjustment tank (3), an accident tank (4), an anoxic tank (6), an aerobic tank (7), a secondary sedimentation tank (8), a coagulation sedimentation tank (10), a fluidized bed (12), a coagulation reaction tank (13) and an equipment room (19), characterized in that, The anaerobic ponds (6) are two in parallel and are respectively arranged on both sides of the equipment room (19). The aerobic ponds (7) are two in parallel and are respectively arranged on both sides of the equipment room (19). The secondary sedimentation ponds (8) are two in parallel and are respectively arranged on both sides of the equipment room (19). The oil separation pond (1), the regulation pond (3), the accident pond (4), the fluidized bed (12), the coagulation reaction pond (13) and the coagulation sedimentation pond (10) are each provided with one and are distributed on both sides of the equipment room (19). The treatment device is also provided with two tertiary sedimentation ponds (14) in parallel, and the two tertiary sedimentation ponds (14) are respectively arranged on both sides of the equipment room (19). The coking phenol-cyanide wastewater flows sequentially through the anaerobic pond (6), the aerobic pond (7), the secondary sedimentation pond (8) and the tertiary sedimentation pond (14) on the same side of the equipment room (19). The tertiary sedimentation ponds (14) on both sides of the equipment room (19) are both connected to the fluidized bed (12). The regulation pond (3) is connected to both anaerobic ponds (6), and the accident pond (4) is arranged at the other side position of the equipment room (19) corresponding to the regulation pond (3). At the position on the same side of the equipment room (19) relative to the regulation pond (3), a flotation room / drug addition room (16) is arranged. The flotation room / drug addition room (16) is arranged in two layers, with the upper layer being the flotation room (2) and the lower layer being a drug addition room (9). The regulation pond (3) is connected to the flotation room. The flotation room is also connected to the oil separation pond (1) and the two are on the same side of the equipment room (19). Both the secondary sedimentation pond (8) and the tertiary sedimentation pond (14) are provided with sludge discharge pipelines and sludge return pipelines. The sludge discharge pipelines are connected to the sludge thickening pond at the end of the treatment device, and the sludge return pipelines are connected to the aerobic pond (7).

2. The intensive treatment device for coking phenol-cyanide wastewater according to claim 1, wherein, The coking phenol-cyanide wastewater after passing through the tertiary sedimentation pond (14) flows sequentially through the fluidized bed (12), the coagulation reaction pond (13) and the coagulation sedimentation pond (10). The coagulation sedimentation pond (10) is also provided with a sludge discharge pipeline connected to the sludge thickening pond, and the coagulation sedimentation pond (10) is also provided with a sludge return pipeline connected to the coagulation reaction pond (13).

3. The intensive treatment device for coking phenol-cyanide wastewater according to claim 2, wherein, The secondary sedimentation pond (8) is a vertical flow sedimentation pond.

4. The intensive treatment device for coking phenol-cyanide wastewater according to claim 3, characterized in that, The tertiary sedimentation pond (14) is an inclined tube sedimentation pond.

5. The intensive treatment device for coking phenol-cyanide wastewater according to claim 4, characterized in that, A flocculation water distribution pond (15) for adding flocculant to the tertiary sedimentation pond (14) is also arranged between the tertiary sedimentation pond (14) and the secondary sedimentation pond (8).

6. The intensive treatment device for coking phenol-cyanide wastewater according to claim 5, wherein Inclined tube fillers are installed in the coagulation sedimentation pond (10).

7. The intensive treatment device for coking phenol-cyanide wastewater according to claim 6, characterized in that, Pumps required for each functional area of the treatment device are arranged in the equipment room (19).

8. An intensive treatment device for coking phenol-cyanide wastewater according to claim 7, characterized in that, A clear water pond (11) is also arranged at a position adjacent to the coagulation sedimentation pond (10). A drug addition room (9) is arranged at a position adjacent to the clear water pond (11). A soda ash drug dissolution pond (17) and a water purification agent drug dissolution pond (18) are arranged in the drug addition room (9). The clear water pond (11), the soda ash drug dissolution pond (17) and the water purification agent drug dissolution pond (18) are all on the same side of the equipment room (19) as the coagulation sedimentation pond (10).

9. The intensive treatment device for coking phenol-cyanide wastewater according to claim 8, characterized in that, A low-level sump is provided at the overflow weir of the secondary sedimentation tank (8), and is connected to the soda ash dosing tank (17) through a pipeline; a low-level sump is also provided at the overflow weir of the coagulation sedimentation tank (10), and is connected to the flocculant dosing tank (18) through a pipeline.

10. The intensive treatment device for coking phenol-cyanide wastewater according to claim 9, characterized in that, During the operation of the treatment device, the water depth of the anoxic tank (6) and the aerobic tank (7) is ≥6m; the total tank depth of the fluidized bed (12), the coagulation reaction tank (13) and the coagulation sedimentation tank (10) is ≥6.4m and the liquid levels of the three are the same, and are all 0.3 - 0.4m lower than the liquid level of the tertiary sedimentation tank (14); the liquid level of the secondary sedimentation tank (8) is flush with the liquid level of the aerobic tank (7); the liquid level of the tertiary sedimentation tank (14) is 0.3 - 0.4m lower than the liquid level of the secondary sedimentation tank (8); the highest liquid level of the clear water tank (11) is 0.3 - 0.4m lower than the liquid level of the coagulation sedimentation tank (10), and the depth of the highest liquid level of the clear water tank (11) is 5.1 - 4.8m.

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