CN215049476U - Coal tar processing and needle coke waste water treatment system - Google Patents
Coal tar processing and needle coke waste water treatment system Download PDFInfo
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- CN215049476U CN215049476U CN202120238045.8U CN202120238045U CN215049476U CN 215049476 U CN215049476 U CN 215049476U CN 202120238045 U CN202120238045 U CN 202120238045U CN 215049476 U CN215049476 U CN 215049476U
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Abstract
The utility model provides a coal tar processing and needle coke waste water treatment system, the biochemical treatment link includes one-level oxygen deficiency aerobic biochemical unit, one-level sedimentation tank, second grade oxygen deficiency aerobic biochemical unit and second grade sedimentation tank. The utility model discloses in, biochemical treatment link uses two-stage biochemical treatment unit, and cooperation BAF biological filter and plus carbon source, further turn into nitrogen gas and follow aquatic desorption with nitric acid nitrogen and nitrous acid nitrogen, the total nitrogen content in aquatic has been reduced, adopt ozone oxidation's strong oxidation treatment technique, the pollutant that can't carry out biochemical decomposition in with waste water is handled through the means of treatment of ozone strong oxidation, carry out final reaction treatment and quick filtration treatment before the water discharge, get rid of the medicament through adding COD and filter and further get rid of pollutants such as remaining CODcr, after above-mentioned processing, the content of various pollutants accords with national standard and reduces 8-10% than traditional technique.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment technique and specifically relates to a coal tar processing and needle coke waste water treatment system.
Background
Various waste water can be generated in the coal tar processing and needle coke production processes, wherein the needle coke production waste water comprises waste water generated in the links of a heating furnace, cold coke water and the like, the tar production waste water comprises waste water generated in the links of process separation, asphalt underwater forming and the like, and the waste water also comprises waste water generated in the links of a waste heat boiler, a circulating water station and the like besides the waste water, and the waste water contains COD (chemical oxygen demand) incrPhenol, NH3N, petroleum and other pollutants. The traditional wastewater treatment process in the industry mainly comprises oil-water separation and biochemical treatment, wherein the biochemical treatment is used for reducing phenol and NH in water by virtue of the oxidative decomposition of microorganisms3N and other harmful substances, but in practical calculation analysis, the traditional wastewater treatment technology has the following problems: 1. most of the ammonia nitrogen after biochemical treatment is converted into NO2 -And NO3 -But not converted to N2Therefore, the difference between the total nitrogen of the effluent and the water inlet is not great; 2. the biochemically treated water still has some pollutants which are difficult to decompose and have great harm to the environment if directly discharged. From the above, the existing biochemical treatment process and the treatment process after the biochemical treatment should be continuously optimized to further reduce the pollutants in the water.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art and providing a coal tar processing and needle coke production wastewater treatment system which utilizes two-stage biochemical treatment, ozone oxidation, a BAF biological filter and the modes of adding medicine and filtering to further reduce suspended matters and other harmful substances in water and make the effluent superior to the national standard.
The utility model provides a following technical scheme is:
the utility model provides a coal tar processing and needle coke waste water treatment system, includes the biochemical treatment link, its characterized in that: the biochemical treatment link comprises a primary anoxic/aerobic biochemical unit, a primary sedimentation tank, a secondary anoxic/aerobic biochemical unit and a secondary sedimentation tank;
the water outlet of the first-stage anoxic/aerobic biochemical unit is connected with the water inlet of the first-stage sedimentation tank, the water outlet of the first-stage sedimentation tank is connected with the water inlet of the second-stage anoxic/aerobic biochemical unit, and the water outlet of the second-stage anoxic/aerobic biochemical unit is connected with the water inlet of the second-stage sedimentation tank;
the first-stage anoxic/aerobic biochemical unit and the second-stage anoxic/aerobic biochemical unit are connected with an air outlet of the low-pressure fan and a medicine outlet of the medicament storage tank.
Furthermore, the water inlet of the first-stage anoxic/aerobic biochemical unit is connected with the water outlet of an air floatation device.
Furthermore, a regulating water tank and a homogenizing regulating tank are arranged between the first-stage anoxic/aerobic biochemical unit and the air floatation device.
And the water outlet of the secondary sedimentation tank is connected with the water inlet of the other air floatation device.
And the water outlet of the other air floatation device is connected with the water inlet of the other adjusting water tank, the water outlet of the adjusting water tank is connected with the water inlet of one ozone oxidation tower, and the ozone oxidation tower is connected with an ozone generator.
Furthermore, the air floatation device is connected with an air outlet of the low-pressure fan and a medicine outlet of the medicine storage tank.
And the water outlet of the ozone oxidation tower is connected with the water inlet of the BAF biological filter, the water outlet of the BAF biological filter is connected with the water inlet of the final reaction tank, and the BAF biological filter is connected with the air outlet of the low-pressure fan and the medicine outlet of the medicine storage tank.
And moreover, the water inlet of the final reaction tank is connected with the water inlet of the rapid filter, and the water outlet of the rapid filter is connected with a sewage discharge pipeline.
And the muddy water outlet of the BAF biological filter is connected with the muddy water inlet of the primary sedimentation tank.
The utility model discloses the technical effect who gains is:
the utility model discloses in, give birth toIn the chemical treatment step, two-stage biochemical treatment units are used, and NO is treated by matching with a BAF biological filter and an external carbon source2 -And NO3 -The wastewater is further converted into nitrogen and removed from water, the total nitrogen content in the water is reduced, pollutants which cannot be biochemically decomposed in the wastewater are treated by a treatment means of strong ozone oxidation by adopting a strong ozone oxidation treatment technology, the water quality is further improved, final reaction treatment and rapid filtration treatment are carried out before water is discharged, residual pollutants such as CODcr and the like are further removed by adding a COD removal agent and filtering, and after the treatment, the content of various pollutants in the water discharged from a sewage discharge pipeline accords with the national standard and is reduced by 8-10% compared with the content of various pollutants in the traditional technology.
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Fig. 1 is a schematic diagram of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a coal tar processing and needle coke waste water treatment system, as shown in figure 1, including biochemical treatment link, the utility model discloses an innovation lies in: the biochemical treatment step comprises a primary anoxic/aerobic biochemical unit, a primary sedimentation tank, a secondary anoxic/aerobic biochemical unit and a secondary sedimentation tank. The water outlet of the first-stage anoxic/aerobic biochemical unit is connected with the water inlet of the first-stage sedimentation tank, the water outlet of the first-stage sedimentation tank is connected with the water inlet of the second-stage anoxic/aerobic biochemical unit, and the water outlet of the second-stage anoxic/aerobic biochemical unit is connected with the water inlet of the second-stage sedimentation tank. The first-stage anoxic/aerobic biochemical unit and the second-stage anoxic/aerobic biochemical unit are connected with an air outlet of the low-pressure fan and a medicine outlet of the medicament storage tank.
The water inlet of the first-stage anoxic/aerobic biochemical unit is connected with the water outlet of an air floatation device through a homogeneous adjusting tank and an adjusting water tank. The water outlet of the second-stage sedimentation tank is connected with the water inlet of the other air floatation device. The water outlet of the other air floatation device is connected with the water inlet of the other adjusting water tank, the water outlet of the adjusting water tank is connected with the water inlet of one ozone oxidation tower, and the ozone oxidation tower is connected with an ozone generator. The air floatation device is connected with an air outlet of the low-pressure fan and a medicine outlet of the medicine storage tank. The adjusting water tank plays a role in buffering, and impact resistance of a subsequent process is improved.
The effluent of the aerobic tank in the primary/secondary anoxic/aerobic biochemical unit flows into the primary/secondary sedimentation tank by gravity to realize gravity sludge-water separation, part of sludge in the secondary sedimentation tank is sent to the non-sludge concentration tank and then is transported away after being treated by the sludge dewatering device, and part of sludge-water mixed liquid flows back to the anoxic tank and the aerobic tank to increase the sludge concentration.
The purpose of the two air flotation devices is: air distributed by bubbles is filled in the air flotation device, so that micro bubbles are adhered to particles suspended in water to form a water-air-particle three-phase mixed system, the particles float upwards when the density is less than that of the water after the bubbles are adhered to the particles, a scum layer is formed, suspended matters brought in the water are further removed, and a certain amount of medicine comprising flocculating agent PAC (polyaluminium chloride) and coagulant aid PAM (polyacrylamide) is added in the process.
The water inlet of the front end air floatation device is connected with the water outlet of the gravity oil removal tank, the water inlet of the gravity oil removal tank is connected with the wastewater collection tank, and the wastewater collection tank receives the production wastewater gathered in each production link. Heavy oil and light oil collected by the front-end air floatation device are conveyed to a waste oil collecting device, treated by an oil sludge dewatering device and conveyed to a storage tank.
Heavy oil and light oil collected by the rear-end air flotation device are conveyed into the gravity oil removal tank to be separated again, and then the heavy oil and the light oil are collected to the front-end air flotation device to be separated.
Wastewater firstly enters an anoxic tank, and combined type filler is arranged in the anoxic tank. The water entering from the bottom can ensure the full contact of the wastewater and the filler, and the wastewater entering the anoxic pond generates denitrification reaction under the action of denitrifying bacteria to remove part of NO in the water2 -And NO3 -Reduction to N2The gas escapes. The water outlet of the anoxic tank is uniformly distributed to the aerobic tank through the aerobic water inlet and distribution channel, and the microporous aeration device is arranged in the aerobic tank to continuously supply oxygen, so that the activity of microorganisms is ensured. The wastewater entering the aerobic tank reacts NH in the water under the action of nitrifying bacteria3Oxidation of-N to NO2 -And NO3 -In the process, alkali is added to neutralize acid generated in the nitration reaction process and adjust the pH value. A denitrification carbon source is required to be added into the anoxic tank, and NaOH is required to be added into the aerobic tank to adjust the pH value.
Ozone generated by oxygen electrolysis is filled in the ozone oxidation tower and used as a strong oxidant to degrade refractory pollutants which cannot be biochemically degraded by microorganisms in water into CO2And water, in order to prolong the time of the ozone oxidation decomposition reaction, the BAF biological filter is connected in series after the water is discharged from the ozone oxidation tower, and the method specifically comprises the following steps: the water outlet of the ozone oxidation tower is connected with the water inlet of the BAF biological filter, the water outlet of the BAF biological filter is connected with the water inlet of the final reaction tank, and the BAF biological filter is connected with the air outlet of the low-pressure fan and the medicine outlet of the medicine storage tank. Introducing air and adding a denitrification carbon source into the BAF biological filter. Returning sludge formed by backwashing the BAF biological filter to the primary sedimentation tank.
And a water outlet of the final reaction tank is connected with a water inlet of the rapid filter, the suspension is separated by utilizing the porous medium, liquid in the suspension flows out through a pore channel of the medium under the action of external force, and the suspended solid particles are cut off. The water outlet of the rapid filter is connected with a sewage pipeline. The muddy water outlet of the BAF biological filter is connected with the muddy water inlet of the primary sedimentation tank. And finally, adding a COD removal agent into the reaction tank according to the detection result.
The tanks, piping between units, channels, pumps, valves and control units may all use products of conventional technology and will not be described in detail here.
The utility model discloses in, biochemical treatment link uses two-stage biochemical treatment unit to cooperation BAF biological filter and plus carbon source, with NO2 -And NO3 -The wastewater is further converted into nitrogen and removed from water, the total nitrogen content in the water is reduced, pollutants which cannot be biochemically decomposed in the wastewater are treated by a treatment means of strong ozone oxidation by adopting a strong ozone oxidation treatment technology, the water quality is further improved, final reaction treatment and rapid filtration treatment are carried out before water is discharged, residual pollutants such as CODcr and the like are further removed by adding a COD removal agent and filtering, and after the treatment, the content of various pollutants in the water discharged from a sewage discharge pipeline accords with the national standard and is reduced by 8-10% compared with the content of various pollutants in the traditional technology.
Claims (9)
1. The utility model provides a coal tar processing and needle coke waste water treatment system, includes the biochemical treatment link, its characterized in that: the biochemical treatment link comprises a primary anoxic/aerobic biochemical unit, a primary sedimentation tank, a secondary anoxic/aerobic biochemical unit and a secondary sedimentation tank;
the water outlet of the first-stage anoxic/aerobic biochemical unit is connected with the water inlet of the first-stage sedimentation tank, the water outlet of the first-stage sedimentation tank is connected with the water inlet of the second-stage anoxic/aerobic biochemical unit, and the water outlet of the second-stage anoxic/aerobic biochemical unit is connected with the water inlet of the second-stage sedimentation tank;
the first-stage anoxic/aerobic biochemical unit and the second-stage anoxic/aerobic biochemical unit are connected with an air outlet of the low-pressure fan and a medicine outlet of the medicament storage tank.
2. The coal tar processing and needle coke production wastewater treatment system according to claim 1, characterized in that: the water inlet of the first-stage anoxic/aerobic biochemical unit is connected with the water outlet of an air floatation device.
3. The coal tar processing and needle coke production wastewater treatment system according to claim 2, characterized in that: an adjusting water tank and a homogenizing adjusting tank are arranged between the first-stage anoxic/aerobic biochemical unit and the air floatation device.
4. The coal tar processing and needle coke production wastewater treatment system according to claim 3, characterized in that: and the water outlet of the secondary sedimentation tank is connected with the water inlet of the other air floatation device.
5. The coal tar processing and needle coke production wastewater treatment system according to claim 4, characterized in that: the water outlet of the other air floatation device is connected with the water inlet of the other adjusting water tank, the water outlet of the adjusting water tank is connected with the water inlet of one ozone oxidation tower, and the ozone oxidation tower is connected with an ozone generator.
6. The coal tar processing and needle coke production wastewater treatment system according to claim 5, characterized in that: the air floatation device is connected with an air outlet of the low-pressure fan and a medicine outlet of the medicine storage tank.
7. The coal tar processing and needle coke production wastewater treatment system according to claim 6, characterized in that: the water outlet of the ozone oxidation tower is connected with the water inlet of the BAF biological filter, the water outlet of the BAF biological filter is connected with the water inlet of the final reaction tank, and the BAF biological filter is connected with the air outlet of the low-pressure fan and the medicine outlet of the medicine storage tank.
8. The coal tar processing and needle coke production wastewater treatment system according to claim 7, characterized in that: and the water outlet of the final reaction tank is connected with the water inlet of the rapid filter, and the water outlet of the rapid filter is connected with a sewage discharge pipeline.
9. The coal tar processing and needle coke production wastewater treatment system according to claim 8, characterized in that: and a mud water outlet of the BAF biological filter is connected with a mud water inlet of the primary sedimentation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120238045.8U CN215049476U (en) | 2021-01-28 | 2021-01-28 | Coal tar processing and needle coke waste water treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120238045.8U CN215049476U (en) | 2021-01-28 | 2021-01-28 | Coal tar processing and needle coke waste water treatment system |
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| Publication Number | Publication Date |
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| CN215049476U true CN215049476U (en) | 2021-12-07 |
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| CN202120238045.8U Active CN215049476U (en) | 2021-01-28 | 2021-01-28 | Coal tar processing and needle coke waste water treatment system |
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2021
- 2021-01-28 CN CN202120238045.8U patent/CN215049476U/en active Active
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