CN108996579A - A kind of reuse method of coking wastewater - Google Patents
A kind of reuse method of coking wastewater Download PDFInfo
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- CN108996579A CN108996579A CN201810898741.4A CN201810898741A CN108996579A CN 108996579 A CN108996579 A CN 108996579A CN 201810898741 A CN201810898741 A CN 201810898741A CN 108996579 A CN108996579 A CN 108996579A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2001/007—Processes including a sedimentation step
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
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Abstract
A kind of reuse method of coking wastewater, this method are to be recycled for the coking wastewater after tertiary treatment using bell furnace spray, lithium bromide refrigerator and flushing cinder group technology.Compared with prior art, the beneficial effects of the present invention are: the present invention provides a kind of concentration of bell furnace spray, pre- recuperation of heat, flushing cinder group technologies to carry out recycling and reusing to coking wastewater.This method not only has the characteristics that save the energy, without secondary pollution, but also waste heat has obtained sufficient recycling, and realizes waste water reclaiming zero-emission, has important practical significance to the sustainable development of enterprise.
Description
Technical field
The present invention relates to water-treatment technology field more particularly to a kind of reuse methods of coking wastewater.
Background technique
Coking wastewater is the waste water generated in coal coke, gas purification and coke chemicals removal process, contains high concentration
Phenol, cyanide, rhodanide and ammonia nitrogen, while also containing being difficult to the heterocyclic compounds such as biodegradable oils, pyridine and naphthalene
The poly-ring aromatic compounds such as anthracene (PAHs).Both at home and abroad for Treatment of Coking Effluent technology mainly include physical method, chemical method and
Biochemical method, wherein physical method such as extracting and dephenolizing, ammonia still process or air stripping deammoniation, coagulation, absorption etc.；Chemical method such as wet type oxygen
High-level oxidation technologies, the portion of techniques such as change, photochemical oxidation, electrochemical oxidation, ozone oxidation and Fenton reagent oxidation are also located
In the laboratory research stage；Bioanalysis has many advantages, such as that processing cost is low, pollution is small, pollutant removal is thorough, is widely used in
Treatment of Coking Effluent, it usually needs combining with physico-chemical process can just make coking wastewater reach discharge standard.
Coking industry only focuses on the qualified discharge of organic wastewater mostly at present, and brine waste is lauched discharge as cleaning.
The water and draining rich and influential family such as domestic steel, coal chemical industry, strong brine mostly outlet, having resulted in some areas, Soil Secondary occur saline and alkaline
The problems such as change and underground water pollution.The weight waste water of the chemical industry through biochemical treatment qualified discharge such as domestic coal chemical industry, although COD,
Ammonia nitrogen etc. reaches environmentally friendly outlet standard, but contains NaCl, Na inside water2SO4、CaCl2、MgSO4、MgCl2And Fe (II/III) etc.
Salt, its main feature is that salt content is high, pollutant is based on total salinity, TDS is usually even higher in 5000mg/L or so, also contains
There is a small amount of organic matter difficult to degrade.This kind of waste water direct reuse easily causes the corrosion and scalings such as pipeline, device, seriously threatens production
The normal operation of equipment limits recycling for this kind of high-salt wastewater.The depth of the industries high slat-containing wastewater such as steel, coal chemical industry
Processing is also attracted extensive attention with desalination reuse, and the enterprises such as coal chemical industry will carry out cycling utilization of wastewater and reduce discharge amount, is badly in need of
Solve the problems, such as waste water desalination.
Chinese patent, CN104016530, a kind of method of high saliferous advanced treatment of industrial waste water and desalination reuse, this is specially
It is miscellaneous to remove high valence ion, organic matter in waste water etc. using group technologies such as flocculation sedimentation, advanced oxidation and UF membranes respectively for benefit
Matter is then concentrated again, although treatment effect is preferable, operating cost is remained high, and hinders industrialized application.
Chinese patent, CN101560045A, a kind of coal chemical wastewater treating technique, the technique are mainly characterized by using height
Grade oxidation technology make a return journey water removal in organic pollutant, thus reduce subsequent film concentration fouling membrane.Fenton oxidation additionally adds
Sulfate radical the operation of system can be had a huge impact, investment and operating cost remain high.
Chinese patent, CN1030773143A, a kind of steel plant's strong brine Zero-discharge treating process, the technique use three-level
Reverse osmosis process carries out Waste water concentrating, is then evaporated crystallization.Not only operating cost is very high for the reverse osmosis concentration of three-level, but also
The technique does not account for the problems such as organic pollution and inorganic matter fouling of reverse osmosis membrane, limits promotion and application.
Chinese patent, CN103253820B, a kind of Efficient liquid zero-discharge wastewater treatment method and system, although the system
The mixed salt that it is high-efficient to have the advantages that low energy consumption, but obtains, which can not be disposed, just becomes secondary pollution, even dangerous useless
Gurry, therefore there is no solid salt reuse is solved the problems, such as, still perplex the further development of enterprise.
Chinese patent, CN103288309B, a kind of processing method and its application of coal gasification waste water zero-emission.The technique is adopted
The processing that waste water is carried out with bioanalysis, chemical oxidization method and membrane filter method still uses instead improving waste water salt content this respect
Osmosis process significantly increases process flow and operating cost in order to avoid polluting the measure for taking some column with fouling.
Chinese patent, CN104370396B, a kind of sea water desalinization strong brine Zero discharge treatment method and device.Technique master
Being concentrated again for waste water is carried out using electrodialysis, reach the state close to saturated salt, this process operation cost is very high, and
It is complicated for operation, it is unfavorable for large-scale promotion and application.
Chinese patent, CN101857331B, a kind of coal chemical industry wastewater zero emission treatment method and system, are mainly utilized
Activated coke filter bed removes most organic matter by adsorbing, so that subsequent fouling membrane is reduced, although can be avoided film
Pollution, but the secondary pollution and subsequent film generated, which runs high cost, still can not solve.
Summary of the invention
The present invention provides a kind of reuse method of coking wastewater, realizes and dropped when waste water is concentrated instead of biology
The methods of solution, chemical oxidation, water quality clarification softening and film filtering, reduce organic pollutant concentration and waste water total amount, using remaining
The recycling of heat can also be carried out while hot, reduced enterprise's production cost, reduced environmental pollution.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of reuse method of coking wastewater, this method are for the coking wastewater after tertiary treatment, using bell-type
Furnace spray, lithium bromide refrigerator and flushing cinder group technology are recycled, and the specific method is as follows:
1) coking wastewater after tertiary treatment initially enters the cold rolling mill bell furnace spraying cooling inside iron and steel enterprise
Technique, waste water are recycled here, since bell furnace surface temperature is very high, so that extremely difficult degradation remaining in waste water
Organic matter is effectively removed, and COD content is less than 30mg/L in water, while as cooling circulation carries out, water is constantly reduced,
The purpose of wastewater reduction is realized, waste water surplus is 30-40%, and leaving water temperature is 75-85 DEG C；
2) by spray process, treated that coking wastewater enters lithium bromide refrigerator, carries out to the heat contained in waste water
It recycles, the heat source of waste water is converted cold source by refrigeration machine, obtains the water at low temperature that temperature is 17-23 DEG C, supplies on-site
Water at low temperature user, the coking wastewater temperature after heat exchange are 60-70 DEG C；
3) for waste water after above-mentioned process, organic pollutant concentration, water and temperature in waste water have been all satisfied height
The requirement of furnace washing slag water, reuse are the supplement water of washing slag water.
Wherein first order processing includes oil removal, precipitating and air bearing for the tertiary treatment, and second level processing includes at biochemistry
Reason, flocculation sedimentation, third level processing include filtering absorption, chemical oxidation, biochemical reinforcement process.
Compared with prior art, the beneficial effects of the present invention are:
The present invention provides a kind of concentration of bell furnace spray, pre- recuperation of heat, flushing cinder group technologies to return to coking wastewater
It receives and recycles.This method not only has the characteristics that save the energy, without secondary pollution, but also to have obtained sufficient recycling sharp for waste heat
With, and waste water reclaiming zero-emission is realized, it has important practical significance to the sustainable development of enterprise.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Below with reference to embodiment, specific embodiments of the present invention will be further explained:
A kind of reuse method of coking wastewater, this method are for the coking wastewater after tertiary treatment, using bell-type
Furnace spray, lithium bromide refrigerator and flushing cinder group technology are recycled, and the specific method is as follows:
1) coking wastewater after tertiary treatment initially enters the cold rolling mill bell furnace spraying cooling inside iron and steel enterprise
Technique, waste water are recycled here, since bell furnace surface temperature is very high, so that extremely difficult degradation remaining in waste water
Organic matter is effectively removed, and COD content is less than 30mg/L in water, while as cooling circulation carries out, water is constantly reduced,
The purpose of wastewater reduction is realized, waste water surplus is 30-40%, and leaving water temperature is 75-85 DEG C；
2) by spray process, treated that coking wastewater enters lithium bromide refrigerator, carries out to the heat contained in waste water
It recycles, the heat source of waste water is converted cold source by refrigeration machine, obtains the water at low temperature that temperature is 17-23 DEG C, supplies on-site
Water at low temperature user, the coking wastewater temperature after heat exchange are 60-70 DEG C；
3) for waste water after above-mentioned process, organic pollutant concentration, water and temperature in waste water have been all satisfied height
The requirement of furnace washing slag water, reuse are the supplement water of washing slag water.
Wherein first order processing includes oil removal, precipitating and air bearing for the tertiary treatment, and second level processing includes at biochemistry
Reason, flocculation sedimentation, third level processing include filtering absorption, chemical oxidation, biochemical reinforcement process.
Embodiment 1:
The object of the present embodiment processing is the coking wastewater after tertiary treatment, wherein pH 6-8, conductivity 5.0-
6.0mS/cm, COD 50-100mg/L, water 200m3/ h, 18-28 DEG C of water temperature.
1) coking wastewater after tertiary treatment initially enters the cold rolling mill bell furnace spraying cooling inside iron and steel enterprise
Technique, waste water are recycled here, since bell furnace surface temperature is very high, so that extremely difficult degradation remaining in waste water
Organic matter is effectively removed, and processed waste water COD content is less than 30mg/L, while as cooling circulation progress water is continuous
It reduces, realizes the purpose of wastewater reduction, waste water surplus is 60-80m3/ h, leaving water temperature are 75-85 DEG C；
2) by spray process, treated that coking wastewater enters lithium bromide refrigerator, carries out to the heat contained in waste water
It recycles, the heat source of waste water is converted cold source by refrigeration machine, obtains the water at low temperature that temperature is 17-23 DEG C, supplies on-site
Water at low temperature user, the coking wastewater temperature after heat exchange are 60-70 DEG C；
3) for waste water after above-mentioned process, organic pollutant concentration, water and temperature in waste water have been all satisfied height
The requirement of furnace washing slag water, can be using reuse as the supplement water of washing slag water.
Claims (1)
1. a kind of reuse method of coking wastewater, which is characterized in that this method is to be directed to the coking wastewater after tertiary treatment,
It is recycled using bell furnace spray, lithium bromide refrigerator and flushing cinder group technology, the specific method is as follows:
1) coking wastewater after tertiary treatment initially enters bell furnace spraying cooling technique, very due to bell furnace surface temperature
Height, remaining organic matter is removed in waste water, and COD content is less than 30mg/L in water, while as cooling circulation carries out, water
Amount constantly reduces, and waste water surplus is 30-40%, and leaving water temperature is 75-85 DEG C；
2) by spray process, treated that coking wastewater enters lithium bromide refrigerator, recycles to the heat contained in waste water
It utilizes, the heat source of waste water is converted cold source by refrigeration machine, obtains the water at low temperature that temperature is 17-23 DEG C, supplies the low temperature of on-site
Water user, the coking wastewater temperature after heat exchange are 60-70 DEG C；
3) for waste water after above-mentioned process, organic pollutant concentration, water and temperature in waste water have been all satisfied blast furnace punching
The requirement of pulp water, reuse are the supplement water of washing slag water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898741.4A CN108996579B (en) | 2018-08-08 | 2018-08-08 | Method for recycling coking wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810898741.4A CN108996579B (en) | 2018-08-08 | 2018-08-08 | Method for recycling coking wastewater |
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| CN108996579A true CN108996579A (en) | 2018-12-14 |
| CN108996579B CN108996579B (en) | 2021-07-20 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825285A (en) * | 2010-05-17 | 2010-09-08 | 北京航天动力研究所 | Burning treatment method and device for organic waste water containing salt |
| CN104031663A (en) * | 2014-05-30 | 2014-09-10 | 石家庄德正环保科技有限公司 | Novel continuous wet quenching process |
| CN105923868A (en) * | 2016-03-15 | 2016-09-07 | 金能科技股份有限公司 | Coking wastewater depth treatment process and processing system |
| KR20160122579A (en) * | 2015-04-14 | 2016-10-24 | 주식회사 대웅 | Dehydration material of sludge and soil with high water containing rate |
| CN106381354A (en) * | 2016-12-05 | 2017-02-08 | 中冶赛迪工程技术股份有限公司 | Treatment system and method utilizing biochemically treated tail water of coking wastewater for slag flushing water replenishing |
-
2018
- 2018-08-08 CN CN201810898741.4A patent/CN108996579B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825285A (en) * | 2010-05-17 | 2010-09-08 | 北京航天动力研究所 | Burning treatment method and device for organic waste water containing salt |
| CN104031663A (en) * | 2014-05-30 | 2014-09-10 | 石家庄德正环保科技有限公司 | Novel continuous wet quenching process |
| KR20160122579A (en) * | 2015-04-14 | 2016-10-24 | 주식회사 대웅 | Dehydration material of sludge and soil with high water containing rate |
| CN105923868A (en) * | 2016-03-15 | 2016-09-07 | 金能科技股份有限公司 | Coking wastewater depth treatment process and processing system |
| CN106381354A (en) * | 2016-12-05 | 2017-02-08 | 中冶赛迪工程技术股份有限公司 | Treatment system and method utilizing biochemically treated tail water of coking wastewater for slag flushing water replenishing |
Non-Patent Citations (1)
| Title |
|---|
| 中国炼焦行业协会编著: "《创新发展中的中国焦化业》", 31 January 2017, 北京：冶金工业出版社 * |
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