CN218345294U - Coal chemical wastewater treatment device - Google Patents
Coal chemical wastewater treatment device Download PDFInfo
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- CN218345294U CN218345294U CN202221876527.7U CN202221876527U CN218345294U CN 218345294 U CN218345294 U CN 218345294U CN 202221876527 U CN202221876527 U CN 202221876527U CN 218345294 U CN218345294 U CN 218345294U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The utility model belongs to the field of sewage treatment, in particular to a coal chemical wastewater treatment device; the method can carry out low-cost and high-quality primary treatment on the coal chemical industry sewage, and provides a foundation for subsequent biochemical treatment; the technical scheme is as follows: the coal chemical wastewater treatment device comprises a sewage pretreatment tank, an adjusting tank, a coagulating sedimentation device, an anaerobic biological fluidized bed reaction tank, an anoxic carrier fluidized bed reaction tank, a sequencing batch biofilm reaction tank and an artificial wetland which are sequentially connected in series. The sewage pretreatment pond includes: the device comprises a first pretreatment tank, a second pretreatment tank, a third pretreatment tank and a water-oil separator. The first pretreatment tank is provided with a water inlet communicated with the sewage inlet pipe. A first overflow groove is arranged between the first pretreatment tank and the second pretreatment tank. A second overflow trough is arranged between the second pretreatment tank and the third pretreatment tank. The water-oil separator comprises a buoy and a water drainage hose fixed on the buoy, and the water outlet end of the water drainage hose extends into the adjusting tank.
Description
Technical Field
The utility model belongs to the sewage treatment field, concretely relates to coal chemical industry effluent treatment plant.
Background
The coal chemical industry wastewater is a general name of wastewater from all links in the coking process of a coal chemical industry plant and mainly comprises a coal pyrolysis and dry distillation stage, a raw coke oven gas recovery and purification stage and a chemical product recovery and refining stage. The main discharge sources of the waste water are as follows: (1) residual ammonia waste liquid generated by coal pyrolysis and raw gas cooling: the waste water is a main discharge source of the waste water of the coal chemical industry plant, and accounts for more than half of the discharge amount of the waste water of the whole plant. The sewage has complex water quality, the mass concentration of phenol is 600-1200 mg/L, the Chemical Oxygen Demand (COD) is about 3000mg/L, and the mass concentration of NH3 is 200-300 mg/L; (2) coal gas final cooling circulation sewage draining: when the gas is finally cooled, a certain amount of phenol, cyanide, sulfide and the like in the gas enter cooling water, and the finally-cooled circulating water part needs to be replaced by new water, so that a certain amount of sewage containing phenol and cyanide and a small amount of sulfide are discharged; (3) separating water from chemical products: condensed water and chemical product sedimentation separation products in the course of the coarse and fine processing of chemical products, and sewage discharged from various storage tanks periodically; (4) the sewage generated by running, overflowing, dripping and leaking in the chemical production workshop. The coal chemical wastewater contains a large amount of complex components, aromatic high-concentration nondegradable organic pollutants and inorganic salt pollutants such as sulfur, nitrogen, phosphorus and the like, has high concentration and chromaticity and extremely high toxicity, seriously pollutes the environment, and also causes great harm to human health and animal and plant growth.
When sewage in the coal chemical industry is treated, large-particle impurities, dirty oil and the like contained in the sewage need to be separated through pretreatment, and a premise is provided for subsequent biochemical treatment and desalination treatment.
During pretreatment of coal chemical industry sewage, a grating is generally adopted to remove suspended matters, and oil substances in the sewage are not treated or are simply treated by water-oil separation equipment under most conditions due to the fact that the oil substances are few in content, light in weight and inconvenient to treat, so that the cost is high and the treatment effect is poor.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a coal chemical wastewater treatment device can carry out low-cost and high-quality preliminary treatment to coal chemical sewage, provides the basis for subsequent biochemical treatment.
In order to realize the technical purpose, the utility model provides a technical scheme does: a coal chemical wastewater treatment device comprises a sewage pretreatment tank, an adjusting tank, a coagulator, an anaerobic biological fluidized bed reaction tank, an anoxic carrier fluidized bed reaction tank, a sequencing batch biofilm reaction tank and an artificial wetland which are sequentially connected in series;
wherein, sewage preliminary treatment pond includes: the device comprises a first pretreatment tank, a second pretreatment tank, a third pretreatment tank and a water-oil separator. Wherein, first preliminary treatment pond is provided with the water inlet with sewage inlet tube intercommunication. The second pretreatment tank is arranged on one side of the first pretreatment tank, and a first overflow groove is formed between the first pretreatment tank and the second pretreatment tank. The third pretreatment tank is arranged on one side of the second pretreatment tank, and a second overflow groove is arranged between the second pretreatment tank and the third pretreatment tank. The water-oil separator comprises a buoy and a drainage hose fixed on the buoy, the water inlet end of the drainage hose is lower than the lowest end of the buoy, and the water outlet end of the drainage hose extends into the adjusting tank.
Preferably, the drain hose includes: a first flexible water pipe and a second pipeline. Wherein, first water hose is the U-shaped pipeline, the one end of first water hose is the end of intaking of drainage hose, the one end of first water hose is fixed in on the buoy, the other end of first water hose is fixed in on the pool wall in third preliminary treatment pond. One end of the second pipeline is communicated with the other end of the first soft water pipe, and the other end of the second pipeline extends into the regulating reservoir.
Preferably, the density of the float is greater than 0.93g/ml and less than 1.00g/ml.
Preferably, the first overflow groove is higher than the second overflow groove, and the first overflow groove is higher than the water inlet.
Preferably, the water-oil separator still includes the suction pump, the water inlet of suction pump with the other end intercommunication of second pipeline, the delivery port of suction pump set up in the equalizing basin.
Preferably, the upper end of the wall of the third pretreatment tank is higher than the bottom of the second overflow groove.
Preferably, the suction pump with still be provided with the three-way valve between the second pipeline, the first end of three-way valve with the water inlet intercommunication of suction pump, the second end of three-way valve with the other end intercommunication of second pipeline, the third end of three-way valve is the play water end of drainage hose.
Preferably, the water outlet end of the drain hose is lower than the bottom of the second overflow groove.
Compared with the prior art, the utility model following beneficial effect has:
first, the utility model discloses a sewage pretreatment pond can further get rid of particulate matter and oily substance in the coal industry sewage, does benefit to follow-up biochemical treatment.
Second, the utility model discloses a first preliminary treatment pond and second preliminary treatment pond can realize that particulate matter among the coal industry sewage is preliminary precipitated and the secondary is depositd, and the second preliminary treatment pond does not receive the influence of water inlet, does benefit to the particulate matter and subsides, can reduce particulate matter content in the sewage.
Third, the utility model discloses a third preliminary treatment pond and water oil separator can discharge the sewage of oily substance below to the equalizing basin in, stop the influence of greasy dirt to follow-up biochemical treatment.
Drawings
FIG. 1 is a structural diagram provided by the present invention;
FIG. 2 is a sectional view of a sewage pretreatment tank provided by the present invention;
FIG. 3 is a top view of a sewage pretreatment tank provided by the present invention;
fig. 4 is a structure diagram of a drainage hose provided by the present invention.
Detailed Description
The following detailed description is to be read in connection with the accompanying drawings and the examples:
as shown in figure 1, the utility model provides a coal chemical industry effluent treatment plant. The coal chemical wastewater treatment device comprises a sewage pretreatment tank 1, an adjusting tank 2, a coagulator 3, an anaerobic biological fluidized bed reaction tank 4, an anoxic carrier fluidized bed reaction tank 5, a sequencing batch biofilm reaction tank 6 and an artificial wetland 7 which are sequentially connected in series.
Wherein, as shown in fig. 2, the sewage pretreatment tank 1 includes: a first pretreatment tank 11, a second pretreatment tank 12, a third pretreatment tank 13 and a water-oil separator 14. Wherein, the first pretreatment tank 11 is provided with a water inlet communicated with the sewage inlet pipe. The sewage inlet pipe communicates with the superior sewage collecting and treating device, and the sewage produced by coal chemical industry is injected into the first pretreatment tank 11 through the sewage inlet pipe. In coal chemical industry, such as coal washing, the sewage inevitably carries silt, coal powder, kerosene and oil leaked by mechanical equipment.
The second pretreatment tank 12 is disposed at one side of the first pretreatment tank 11, and a first overflow tank 111 is disposed between the first pretreatment tank 11 and the second pretreatment tank 12. The third pretreatment tank 13 is disposed on one side of the second pretreatment tank 12, and a second overflow tank 112 is disposed between the second pretreatment tank 12 and the third pretreatment tank 13.
Preferably, the first overflow launder 111 is higher than the second overflow launder 112, and the first overflow launder 111 is higher than the water inlet.
Preferably, the upper end of the wall of the third pretreatment tank 13 is higher than the bottom of the second overflow tank 112.
The sewage enters the first pretreatment tank 11 and then is statically precipitated, particulate matters in the sewage descend, and after the sewage inlet pipe is injected with water again, the sewage in the first pretreatment tank 11 enters the second pretreatment tank 12 through the first overflow groove 111. Similarly, the sewage is settled for the second time in the second pretreatment tank 12, the content of the particulate matters in the sewage is further reduced, then the sewage overflows to the third pretreatment tank 13, and the sewage can be settled for the third time in the third pretreatment tank 13.
As shown in fig. 2 and 3, the water-oil separator 14 includes a float 141, and a drain hose 142 fixed to the float, wherein a water inlet end of the drain hose 142 is lower than a lowermost end of the float 141, and a water outlet end of the drain hose 142 extends into the adjusting tank 2.
Preferably, as shown in fig. 2 and 4, the drain hose 142 includes: a first soft water pipe 1421 and a second pipe 1422. The first soft water pipe 1421 is a U-shaped pipe, one end of the first soft water pipe 1421 is a water inlet end of the water discharge hose 142, one end of the first soft water pipe 1421 is fixed on the float 141, and the other end of the first soft water pipe 1421 is fixed on the wall of the third pretreatment tank 13. One end of the second pipe 1422 communicates with the other end of the first soft water pipe 1421, and the other end of the second pipe 1422 extends into the regulating tank 2.
Preferably, the density of the float 141 is greater than 0.93g/ml and less than 1.00g/ml.
Generally, the oil contained in the sewage of coal chemical industry is mainly: light diesel oil, kerosene, lubricating oil leaked from mechanical equipment, hydraulic oil and even oil for combustion. The density of oil contained in the sewage of coal chemical industry is generally less than 0.93g/ml. For example, the density of light diesel oil is 0.83-0.855 g/ml, and the density of kerosene is 0.8g/ml. Therefore, oil contained in the sewage of the coal chemical industry floats on the surface of the sewage, the density of the buoy 141 is more than 0.93g/ml and less than 1.00g/ml, and the buoy 141 can float on the sewage and below the oil contained in the sewage. Further, the water inlet end of the drain hose 142 is lower than the lowest end of the buoy 141, so that the sewage can be ensured to flow out through the drain hose 142, and the oil is remained in the third pretreatment tank.
It will be appreciated that the first flexible water pipe 1421 is a flexible pipe, such as a rubber hose, and the size of the float 141 is adjusted according to the specific mass and thickness of the first flexible water pipe 1421 to ensure that one end of the first flexible water pipe 1421 can be lifted and lowered as the float 141 floats up and down.
Preferably, the water-oil separator 14 further includes a water pump 143, a water inlet of the water pump 143 is communicated with the other end of the second pipeline 1422, and a water outlet of the water pump 143 is disposed in the regulating reservoir.
Preferably, a three-way valve 144 is further disposed between the water pump 143 and the second pipeline 1422, a first end of the three-way valve 144 is communicated with a water inlet of the water pump 143, a second end of the three-way valve 144 is communicated with the other end of the second pipeline 1422, and a third end of the three-way valve 144 is a water outlet end of the drainage hose 142.
It is understood that the suction pump 143 is used to pump the sewage in the third pretreatment tank so that the sewage is filled in the drain hose 142, and the three-way valve 144 may be a power ball valve. A first end of the three-way valve 144 is communicated with a second end of the three-way valve 144, the suction pump 143 pumps the wastewater, the wastewater fills the drainage hose 142, then, the second end of the three-way valve 144 is communicated with a third end of the three-way valve 144, and the wastewater flows from the third pretreatment tank 13 to the regulating valve.
Preferably, the water outlet end of the drain hose 142 is lower than the bottom of the second overflow trough.
After entering the adjusting tank 2, the sewage is connected with the coagulating sedimentation tank 3 through a water pump and a water pipeline. The interior of the coagulation sedimentation tank 3 is divided into a coagulation reaction area and a sedimentation area by a partition plate; the anaerobic biological fluidized bed reaction tank 4 is filled with coke powder biological filler, and the anoxic carrier fluidized bed reaction tank 5 is filled with biological carrier particles with large specific surface area; the water outlet of the anoxic carrier fluidized bed reaction tank 5 is connected with the sequencing batch biofilm reaction tank 6; adding a mixed inert filler of active carbon and anthracite into the sequencing batch biofilm reaction tank 6, and arranging an aeration device at the bottom of the tank; the water outlet of the sequencing batch biofilm reaction tank 6 is connected with an artificial wetland 7, the artificial wetland is a vertical flow artificial wetland and comprises wetland plants, a soil layer, a matrix layer and an impermeable layer from top to bottom, wherein the wetland plants comprise calamus, reed and wild rice stem, and the matrix comprises anthracite, ceramic filter materials and zeolite; and the water outlet of the artificial wetland 7 is connected with a natural water system.
Preferably, a three-phase separator is arranged at the top of the anaerobic biological fluidized bed reaction tank, and a gas collecting port of the three-phase separator is connected with a tail gas collecting device for collecting the discharged methane gas; the upper part of the anoxic carrier fluidized bed reaction tank is provided with a solid-liquid separator.
Preferably, in order to realize the sufficient mixing of the medicament and water and the flocculation adsorption effect, a medicament adding device and a stirring device are arranged in the coagulation sedimentation tank, and a flocculating agent is added into the coagulation reaction zone, wherein the flocculating agent is a natural polymer coagulant, so that the flocculating agent is free of secondary pollution and has the effect of environmental protection.
Preferably, according to the actual wastewater and treatment conditions, the sequencing batch biofilm reaction tank is determined to operate for 7-8 h under anoxic stirring and 10-15 h under aerobic aeration in each period, and the retention time is 50-70 h.
Preferably, according to the plant characteristics and the better purification effect, the yellow flag and the reed are planted at the front end and the rear end of the artificial wetland respectively, and the planting density is 15cm multiplied by 15cm.
The device of the utility model is used for the treatment method of the coal chemical industry wastewater, and the specific flow is as follows:
(1) The coal chemical industry wastewater is collected through a pipeline, and after passing through a front end grid, the wastewater enters a wastewater pretreatment tank 1 to be subjected to multistage sedimentation and oil stain separation.
(2) The sewage after precipitation and oil stain separation enters the regulating tank 2, and stirring equipment is arranged in the tank to homogenize water quality, so that system load impact is reduced.
(3) The wastewater in the regulating tank 2 is conveyed into a coagulating sedimentation tank 3 through a water pump to carry out coagulating sedimentation reaction; and a natural polymer coagulant is added into the coagulating sedimentation tank 2.
(4) Wastewater in a settling zone of the coagulating sedimentation tank 3 automatically flows into an anaerobic biological fluidized bed reaction tank 4, and DO in the anaerobic reaction tank is controlled below 0.2 mg/L; anaerobic bacteria are attached to the coke powder biological filler, the treated wastewater flows into an anoxic carrier fluidized bed reaction tank 5 through a three-phase separator at the upper part, the wastewater flows into a sequencing batch biofilm reaction tank 6 after being subjected to biochemical treatment in an anoxic environment again, the anaerobic stirring is controlled to be 7-8 hours per cycle, the aerobic aeration is controlled to be 10-15 hours, and the retention time is 50-70 hours.
(5) The effluent of the sequencing batch biofilm reaction tank 6 flows into an artificial wetland 7, the wastewater is further purified under the comprehensive action of soil, matrix and plants, and the final effluent reaches the first-grade A standard and can flow into a natural water system.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the invention.
Claims (8)
1. The coal chemical wastewater treatment device is characterized by comprising a sewage pretreatment tank, an adjusting tank, a coagulator, an anaerobic biological fluidized bed reaction tank, an anoxic carrier fluidized bed reaction tank, a sequencing batch biofilm reaction tank and an artificial wetland which are sequentially connected in series;
wherein, sewage preliminary treatment pond includes:
the first pretreatment tank is provided with a water inlet communicated with the sewage inlet pipe;
the second pretreatment tank is arranged on one side of the first pretreatment tank, and a first overflow trough is arranged between the first pretreatment tank and the second pretreatment tank;
the third pretreatment tank is arranged on one side of the second pretreatment tank, and a second overflow groove is arranged between the second pretreatment tank and the third pretreatment tank;
the water-oil separator comprises a buoy and a drainage hose fixed on the buoy, wherein the water inlet end of the drainage hose is lower than the lowest end of the buoy, and the water outlet end of the drainage hose extends into the adjusting tank.
2. The coal chemical industry wastewater treatment apparatus according to claim 1, wherein the drain hose includes:
the first water hose is a U-shaped pipeline, one end of the first water hose is a water inlet end of the drainage hose, one end of the first water hose is fixed on the buoy, and the other end of the first water hose is fixed on the wall of the third pretreatment tank;
a second pipeline, one end of which is communicated with the other end of the first soft water pipe, and the other end of which extends into the regulating reservoir.
3. The coal chemical industry wastewater treatment device of claim 2, wherein the density of the float is greater than 0.93g/ml and less than 1.00g/ml.
4. The coal chemical industry wastewater treatment device according to claim 3, wherein the first overflow tank is higher than the second overflow tank, and the first overflow tank is higher than the water inlet.
5. The coal chemical industry wastewater treatment device of claim 4, wherein the water-oil separator further comprises a water suction pump, a water inlet of the water suction pump is communicated with the other end of the second pipeline, and a water outlet of the water suction pump is arranged in the regulating reservoir.
6. The coal chemical industry wastewater treatment device according to claim 5, wherein the upper end of the tank wall of the third pretreatment tank is higher than the bottom of the second overflow tank.
7. The coal chemical industry wastewater treatment device according to claim 6, wherein a three-way valve is further arranged between the water suction pump and the second pipeline, a first end of the three-way valve is communicated with a water inlet of the water suction pump, a second end of the three-way valve is communicated with the other end of the second pipeline, and a third end of the three-way valve is a water outlet end of the drainage hose.
8. The coal chemical industry wastewater treatment device according to claim 7, wherein a water outlet end of the drain hose is lower than a bottom of the second overflow tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221876527.7U CN218345294U (en) | 2022-07-20 | 2022-07-20 | Coal chemical wastewater treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221876527.7U CN218345294U (en) | 2022-07-20 | 2022-07-20 | Coal chemical wastewater treatment device |
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| Publication Number | Publication Date |
|---|---|
| CN218345294U true CN218345294U (en) | 2023-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221876527.7U Active CN218345294U (en) | 2022-07-20 | 2022-07-20 | Coal chemical wastewater treatment device |
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| CN (1) | CN218345294U (en) |
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2022
- 2022-07-20 CN CN202221876527.7U patent/CN218345294U/en active Active
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