CN104926048A - Treatment method for waste water in coal chemical industry - Google Patents
Treatment method for waste water in coal chemical industry Download PDFInfo
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- CN104926048A CN104926048A CN201510395225.6A CN201510395225A CN104926048A CN 104926048 A CN104926048 A CN 104926048A CN 201510395225 A CN201510395225 A CN 201510395225A CN 104926048 A CN104926048 A CN 104926048A
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Abstract
The invention discloses a treatment method for waste water in coal chemical industry. The treatment method comprises the steps that the waste water in the coal chemical industry flows into a regulating pond, and the waste water is guaranteed to enter into an oil-isolating sedimentation pond with average quality and average quantity; water is discharged from the oil-isolating sedimentation pond and flows to a hydrolysis acidification pond, water is discharged from the acidification pond and is lifted to a UASB anaerobic reactor through a pump, and water is discharged from the UASB anaerobic reactor and flows into a middle sedimentation pond. Water is discharged from the middle sedimentation pond and is lifted to a coagulating sedimentation pond to conduct coagulating sedimentation reaction through a pump; water is discharged from the coagulating sedimentation pond and flows into a biological contact oxidation pond; water is discharged from the biological contact oxidation pond and flows into a secondary sedimentation pond; the sludge in the oil-isolating sedimentation pond, the middle sedimentation pond, the secondary sedimentation pond and the contact oxidation pond is discharged to a sludge concentrating pond to concentrate. The treatment method for waste water in the coal chemical industry has the advantages that the technical treatment effect is stable, impact is resistant, the consumption is low, the efficiency is high, the manage is convenient, and the maintenance is simple.
Description
Technical field
The invention belongs to technical field of coal chemical industry, relate to a kind of method of wastewater treatment, the method for specifically a kind of coal chemical industrial waste water process.
Background technology
Coal Chemical Industry take coal as raw material, makes coal be converted into gas, liquid and solid phase prod or half product, be then processed into the process of chemical industry, energy product further through chemical process.In the various chiral processes of coal, coking is applied the earliest and remains most important method so far, and its main purpose is extraction metallurgy coke, simultaneously by-product gas and the aromatic hydrocarbons such as benzene,toluene,xylene, naphthalene.
Coal chemical industry enterprises water consumption is large, and the waste water of its discharge is mainly derived from the processes such as coal coking, gas purification and Chemicals purification and recover.Such waste water water yield is large, and water quality is complicated, and containing a large amount of organic pollutants, phenol, sulphur and ammonia etc., and containing toxic pollutants such as a large amount of biphenyl, pyridine indoles and quinoline, toxicity is large.Traditional method of wastewater treatment biodegradability is poor, and after biochemical treatment, water quality is difficult to qualified discharge.
Summary of the invention
The object of the invention is to the defect overcoming prior art coal chemical industry wastewater treating method biodegradability difference, a kind of coal chemical industry wastewater treating method is provided.
Object of the present invention can be achieved through the following technical solutions:
A kind of coal chemical industry wastewater treating method, said method comprising the steps of:
(1) pre-treatment: coal chemical industrial waste water flows into equalizing tank, ensures that waste water homogeneous is all measured and enters oil partiting precipitation pool, removes top layer greasy dirt and can the solid pollutant of sedimentation;
(2) anaerobic treatment: oil partiting precipitation pool water outlet is to hydrolysis acidification pool, and hydrolysis acidification pool water outlet is promoted to UASB anaerobic reactor through pump, the water outlet of UASB anaerobic reactor enters medium sediment pool;
(3) coagulating kinetics: medium sediment pool water outlet is promoted to coagulative precipitation tank through pump and carries out coagulating sedimentation reaction;
(4) aerobic treatment: coagulative precipitation tank water outlet enters biological contact oxidation pond, aerobic microbiological removing organism, removes ammonia nitrogen under nitrification and denitrification effect;
(5) advanced treatment: biological contact oxidation pond water outlet enters second pond, and secondary clarifier effluent enters sand filter, cross through sand filter and filter SS in waste water, carry out disinfection through tubular type sterilizing unit, then draining is to clear water reuse pool;
(6) sludge treatment: the mud in oil partiting precipitation pool, medium sediment pool, second pond and contact-oxidation pool drains into sludge thickener and concentrates, sludge thickener supernatant liquor is back to equalizing tank, concentrated rear mud is squeezed into chamber filter press by spiral pump and is dewatered, and mud cake outward transport is disposed.
Establish diving mixer in equalizing tank in described step (1), by stirring action, sewage homogeneous in equalizing tank is all measured.
In described step (3), in coagulative precipitation tank, coagulating agent is iron aluminium compound coagulant, and wherein, quality of alumina mark is 8%, and ferric oxide massfraction is 3%, and the dosage of compound coagulant is 3-5mg/L.
Beneficial effect of the present invention: pre-treatment of the present invention adopts oil partiting precipitation pool, removes most of oily substance and can the solid pollutant of sedimentation, alleviates subsequent biochemical processing load; Present invention process only produces the biological activated sludge of little difficult anaerobic degradation, and the existing sewage of historical facts or anecdotes, the disposable process of mud, do not need the mesophilic digestion pond of often heating.
Embodiment
For the ease of it will be appreciated by those skilled in the art that the present invention is further illustrated below in conjunction with specific embodiment.
Embodiment 1
To the process of 1t coal chemical industrial waste water, coal chemical industrial waste water flows into equalizing tank, diving mixer is established in equalizing tank, stir speed (S.S.) controls at 800r/min, by stirring action, sewage homogeneous in equalizing tank is all measured, and ensures that waste water homogeneous is all measured and enters oil partiting precipitation pool, oil partiting precipitation pool can reach removes top layer greasy dirt and can the object of solid pollutant of sedimentation, adopt oil partiting precipitation pool, remove most of oily substance and can the solid pollutant of sedimentation, alleviate subsequent biochemical processing load.Oil partiting precipitation pool water outlet is to hydrolysis acidification pool, and control pH is between 5.5, and hydrolysis acidification pool water outlet is promoted to UASB anaerobic reactor through pump, and the water outlet of UASB anaerobic reactor enters medium sediment pool.Medium sediment pool water outlet is promoted to coagulative precipitation tank through pump and carries out coagulating sedimentation reaction 120h, in coagulative precipitation tank, coagulating agent is iron aluminium compound coagulant, and wherein, quality of alumina mark is 8%, ferric oxide massfraction is 3%, and the dosage of compound coagulant is 3-5mg/L.Coagulative precipitation tank water outlet enters biological contact oxidation pond, and aerobic microbiological removing organism, removes ammonia nitrogen under nitrification and denitrification effect.Biological contact oxidation pond water outlet enters second pond, and secondary clarifier effluent enters sand filter, and cross through sand filter and filter SS in waste water, carry out disinfection through tubular type sterilizing unit, then draining is to clear water reuse pool, and reclaiming clear water in pond can reach 0.63t.Mud in oil partiting precipitation pool, medium sediment pool, second pond and contact-oxidation pool drains into sludge thickener and concentrates, and sludge thickener supernatant liquor is back to equalizing tank, and concentrated rear mud is squeezed into chamber filter press by spiral pump and dewatered, and mud cake outward transport is disposed.Present invention process only produces the biological activated sludge of little difficult anaerobic degradation, and the existing sewage of historical facts or anecdotes, the disposable process of mud, do not need the mesophilic digestion pond of often heating.
Embodiment 2
To the process of 1.5t coal chemical industrial waste water, coal chemical industrial waste water flows into equalizing tank, diving mixer is established in equalizing tank, stir speed (S.S.) controls at 1100r/min, by stirring action, sewage homogeneous in equalizing tank is all measured, ensure that waste water homogeneous is all measured and enter oil partiting precipitation pool, oil partiting precipitation pool can reach removes top layer greasy dirt and can the object of solid pollutant of sedimentation.Oil partiting precipitation pool water outlet is to hydrolysis acidification pool, and control pH is between 6.8, and hydrolysis acidification pool water outlet is promoted to UASB anaerobic reactor through pump, and the water outlet of UASB anaerobic reactor enters medium sediment pool.Medium sediment pool water outlet is promoted to coagulative precipitation tank through pump and carries out coagulating sedimentation reaction 240h, in coagulative precipitation tank, coagulating agent is iron aluminium compound coagulant, and wherein, quality of alumina mark is 8%, ferric oxide massfraction is 3%, and the dosage of compound coagulant is 3-5mg/L.Coagulative precipitation tank water outlet enters biological contact oxidation pond, and aerobic microbiological removing organism, removes ammonia nitrogen under nitrification and denitrification effect.Biological contact oxidation pond water outlet enters second pond, and secondary clarifier effluent enters sand filter, and cross through sand filter and filter SS in waste water, carry out disinfection through tubular type sterilizing unit, then draining is to clear water reuse pool, and reclaiming clear water in pond can reach 0.77t.Mud in oil partiting precipitation pool, medium sediment pool, second pond and contact-oxidation pool drains into sludge thickener and concentrates, and sludge thickener supernatant liquor is back to equalizing tank, and concentrated rear mud is squeezed into chamber filter press by spiral pump and dewatered, and mud cake outward transport is disposed.
Above content is only citing made for the present invention and explanation; affiliated those skilled in the art make various amendment to described specific embodiment or supplement or adopt similar mode to substitute; only otherwise depart from invention or surmount this scope as defined in the claims, protection scope of the present invention all should be belonged to.
Claims (3)
1. a coal chemical industry wastewater treating method, is characterized in that, the method comprises the following steps:
(1) pre-treatment: coal chemical industrial waste water flows into equalizing tank, ensures that waste water homogeneous is all measured and enters oil partiting precipitation pool, removes top layer greasy dirt and can the solid pollutant of sedimentation;
(2) anaerobic treatment: oil partiting precipitation pool water outlet is to hydrolysis acidification pool, and hydrolysis acidification pool water outlet is promoted to UASB anaerobic reactor through pump, the water outlet of UASB anaerobic reactor enters medium sediment pool;
(3) coagulating kinetics: medium sediment pool water outlet is promoted to coagulative precipitation tank through pump and carries out coagulating sedimentation reaction;
(4) aerobic treatment: coagulative precipitation tank water outlet enters biological contact oxidation pond, aerobic microbiological removing organism, removes ammonia nitrogen under nitrification and denitrification effect;
(5) advanced treatment: biological contact oxidation pond water outlet enters second pond, and secondary clarifier effluent enters sand filter, cross through sand filter and filter SS in waste water, carry out disinfection through tubular type sterilizing unit, then draining is to clear water reuse pool;
(6) sludge treatment: the mud in oil partiting precipitation pool, medium sediment pool, second pond and contact-oxidation pool drains into sludge thickener and concentrates, sludge thickener supernatant liquor is back to equalizing tank, concentrated rear mud is squeezed into chamber filter press by spiral pump and is dewatered, and mud cake outward transport is disposed.
2. coal chemical industry wastewater treating method according to claim 1, is characterized in that, establishes diving mixer, by stirring action, sewage homogeneous in equalizing tank is all measured in described step (1) in equalizing tank.
3. coal chemical industry wastewater treating method according to claim 1, it is characterized in that, in described step (3), in coagulative precipitation tank, coagulating agent is iron aluminium compound coagulant, wherein, quality of alumina mark is 8%, ferric oxide massfraction is 3%, and the dosage of compound coagulant is 3-5mg/L.
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Cited By (3)
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| CN106145539A (en) * | 2016-08-16 | 2016-11-23 | 北京北方节能环保有限公司 | A kind of system and method for hexogen production wastewater treatment |
| CN106315973A (en) * | 2016-08-28 | 2017-01-11 | 潘纪鸿 | Treatment method of high-salt and high-calcium industrial wastewater |
| CN106698846A (en) * | 2017-01-16 | 2017-05-24 | 常州大学 | Advanced treatment system of high-concentration coal chemical wastewater |
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| CN106315973A (en) * | 2016-08-28 | 2017-01-11 | 潘纪鸿 | Treatment method of high-salt and high-calcium industrial wastewater |
| CN106698846A (en) * | 2017-01-16 | 2017-05-24 | 常州大学 | Advanced treatment system of high-concentration coal chemical wastewater |
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Application publication date: 20150923 |