CN103936238B - A kind of method of pyrolysis of coal destructive distillation wastewater treatment - Google Patents
A kind of method of pyrolysis of coal destructive distillation wastewater treatment Download PDFInfo
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- CN103936238B CN103936238B CN201410194957.4A CN201410194957A CN103936238B CN 103936238 B CN103936238 B CN 103936238B CN 201410194957 A CN201410194957 A CN 201410194957A CN 103936238 B CN103936238 B CN 103936238B
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- waste water
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Abstract
A kind of method of pyrolysis of coal destructive distillation wastewater treatment, it is characterized in that: adopt magneticsubstance as the magneticsubstance sorbent material of suspended substance, ash suspended substance in waste water is had that strong absorption is poly-catches ability, material is dropped into waste water, slowly stir, and undertaken by technical process, its technical process is that wastewater disposal basin �� acidification pool �� magnetic force absorption is except the de-COD �� A/O biochemical treatment �� filtration �� Treated sewage reusing of ash content suspended substance �� flocculation sediment oil removal �� coalescent oily water separation de-oiling �� three-phase water-and-oil separator �� filtration �� dephenolize �� ammonia still process �� electrooxidation; It is good that it has magnetic diffusivity, and technique is simple, and dedusting de-oiling is effective.
Description
Technical field
The present invention relates to coal pyrolysis destructive distillation production field Industrial Wastewater Treatment, aim to provide one and can effectively remove ash suspended substance and oil in coal pyrolysis destructive distillation waste water, subsequent disposal workshop section can be run (compared with tradition coal pyrogenation and carbonization waste water treatment process) better, the investment of whole waste water treatment process subtracts province, working cost is low, scientific and effective technique, specifically relates to a kind of method of pyrolysis of coal destructive distillation wastewater treatment.
Background technology
China is coal energy utilization big country, wherein coal pyrolysis destructive distillation is obtained coal mine gas and blue charcoal, then with coal mine gas preparing liquefied natural gas or gasoline, diesel, blue charcoal is used for Metal smelting or thermal power generation, it is a kind of well coal utilization mode. coal pyrolysis destructive distillation waste water quality is because of the pressure of ature of coal and gasifying process, the impact of the factor such as temperature and different, but main composition is substantially identical, and wherein ash is suspended substance, oil, COD, atmosphere cyanogen, the major ingredient content such as ammonia nitrogen are all higher. Coal pyrolysis destructive distillation waste water composition is complicated, and water quality outward appearance situation is also very poor, and nearly all producer gas plant waste water is all Vandyke brown, waste water also often carries a large amount of lightweights or heavy matter coal tar, tar serious emulsification in some waste water, defines again ash bag oil, the dense thick suspension waste water of oil bag ash. If the not treated direct discharge of these coal pyrolysis waste water, serious pollution will be caused. Owing to coal destructive distillation waste water containing a large amount of hazardous and noxious substances, wherein prussiate belongs to highly toxic substance, human central nervous being caused poisoning, cause paralysis and suffocate, the polycyclic aromatic hydrocarbonss such as benzene pyridine have stronger carinogenicity, phenol belongs to hypertoxic type, for cell magma poisonous substance, lower concentration can make protein denaturation, and high density can make protein precipitation, various cell there is is direct murder by poisoning, skin and mucous membrane epidermis are had strong corrosive nature. The nearly all pyrolysis of coal destructive distillation wastewater treatment of current China does not all reach the environmental requirement of national regulation.
The technique of traditional coal pyrolysis destructive distillation wastewater treatment is as follows:
Wastewater disposal basin �� acidification pool �� gravity oil trap oil removing �� oil removal by air bubbling pond �� flocculation sediment oil removal �� filtration �� dephenolize �� ammonia still process �� de-COD �� A/O biochemistry pool �� filtration �� Treated sewage reusing.
Before tradition coal pyrogenation and carbonization waste water treatment process, section is removed ash suspended substance in waste water and is generally adopted interpolation flocculation agent, wishing can by the ash suspended substance flocculation sediment in waste water again by the ash suspended substance in precipitation and filtering and removing waste water, but reality is very undesirable, major cause is the pH value of coal pyrolysis destructive distillation waste water or very low, very high, in strongly-acid or strong basicity, general flocculation agent is such as PVA, PVC, polyacrylic acid, poly-ethanamide, polymerize aluminum chloride one is put in such waste water, flocculation agent will soon lose efficacy by waste water reaction, cannot reach the object of ash suspended substance flocculation sediment in coal pyrolysis destructive distillation waste water. ash suspended substance in coal pyrolysis destructive distillation waste water is mainly with ash bag oil, and the form of oil bag ash exists, and the ash suspended substance particle diameter in waste water is general all very little, less than 5 ��m almost account for more than 90%, depend merely on a certain technology and be difficult to removing.
Summary of the invention
The present invention adopts magneticsubstance to make the sorbent material of ash suspended substance in waste water, magneticsubstance sorbent material is put in waste water and stir, absorption ash suspended substance, again by the waste water that with the addition of magneticsubstance sorbent material of stirring certain time by magnetic separator magnetic field, the magneticsubstance sorbent material catching in waste water is inhaled by magnet, magneticsubstance sorbent material is separated with waste water, owing to magneticsubstance adsorbent surface has adsorbed a lot of ash suspended substance, take off the object except ash suspended substance in waste water such that it is able to reach with magnetic force.
The technique of blue charcoal wastewater treatment disclosed by the invention is as follows:
Wastewater disposal basin �� acidification pool �� magnetic force absorption is except the de-COD �� A/O biochemical treatment �� filtration �� Treated sewage reusing of ash content suspended substance �� flocculation sediment oil removal �� coalescent oily water separation de-oiling �� three-phase water-and-oil separator �� filtration �� dephenolize �� ammonia still process �� electrooxidation.
Whole technical process figure specific as follows:
The waste water ash disposal of the present invention, the technique of de-oiling are as follows:
Coal pyrolysis destructive distillation waste water waste water treatment process: ash disposal �� de-oiling �� dephenolize �� ammonia still process �� electrolytic oxidation is except COD �� biochemical treatment �� filtration �� middle water.
Wherein determine whole waste water treatment process success or failure it is crucial that the ash disposal in early stage, degreasing process. Containing in a large number because of the fine dust particles of coal pyrolysis weathering and mechanical wear generation in pyrolytic process in coal pyrolysis destructive distillation waste water. These dust granules mainly silicate, but owing to the coal pyrolysis temperature of the blue charcoal production of coal pyrolysis destructive distillation is generally at about 550 DEG C, so the ash in waste water mixes in stage and the coal mine gas of coal destructive distillation generation coal mine gas, owing to there is a lot of microvoid structure ash inside, coal mine gas can be permeated at these microvoid structures inner. After the condensed-nuclei aromatics of coal mine gas cools, become liquid dope at ash internal condensation, form the particle of gray oil. Coal mine gas and dust run mutual friction surface with electric charge at a high speed in equipment pipe, after coal mine gas enters washing tower washing, can form the charged glue group of putty look. So ash is with gray oil in coal pyrolysis waste water, the suspended substance that oil bag ash form exists.
If early stage ash disposal, de-oiling is effective, then follow-up materialization dephenolize, ammonia still process, electrochemical oxidation except COD effect all can fairly obvious improvement, working cost will significantly reduce, and investment in infrastructure will significantly reduce and subtract province, save more than 50% than traditional method.
Adopting magnetic force except ash suspended substance, medicament subtracts than traditional method economizes 2/3, and magnetic adsorptive material can be reused, and oil gas can reclaim, and mud discharging greatly reduces, only the 1/5 of original volume less than, working cost subtracts economizes 50%.
Adopt the technology of coalescent de-oil removing, it is not necessary to add medicament can by the recovery of oil more than 90% in waste water, for owner creates huge economic benefit.
Magnetic force is except the ultimate principle of ash suspended substance: the sorbent material put in coal pyrolysis destructive distillation waste water is with Fe3O4, FeO, Fe tri-kinds of compositions be material of main part sintering there is bigger serface, enrich the magneticsubstance of microvoid structure. General microporous solids material has adsorption function, and the size of its adsorptive power depends on surface polarity and specific surface area. The fine suspension in poly-absorption waste water can effectively be caught by the sorbent material that magneticsubstance is made. Also having a major cause: coal pyrolysis destructive distillation waste water Chemical Composition is very complicated, in acid or alkaline, the main composition of sorbing material is Fe3O4, FeO, Fe, one is immersed in waste water can produce micro-galvanic corrosion generation electric charge immediately, the electric charge of this kind of galvanic corrosion generation can destroy ash suspended substance surface charge balance, play and separate solidifying effect, oil and ash can be made better to separate, ash can be made to separate better with other materials in water, promote that in waste water, the de-of ash suspended substance removes.
Owing to magnetic force of the present invention takes off the sorbing material except ash suspended substance itself, there is good magnetic diffusivity, can be inhaled by magnet well in waste water and catch. Magnetic adsorptive material is just equivalent to the porter of ash suspended substance slight one by one, is just moved by the ash suspended substance in waste water separately from waste water by magnetic field, namely can reach the de-object except ash suspended substance in waste water.
Specific embodiment
What the present invention adopted is the magneticsubstance sorbent material of magneticsubstance as ash suspended substance, magneticsubstance is oxidation organic polymer modification iron system poromerics, ash suspended substance in waste water is had that strong absorption is poly-catches ability, material is dropped into waste water, slowly stir, again material and waste water mixture being passed through high-strength magnetic field, material is inhaled after catching and is separated with waste water by the material having adsorbed ash suspended substance by magnetic field, arrives the de-object except ash in waste water.
Process program ash removal efficiency provided by the invention reaches more than 90%. Magneticsubstance sorbent material can regenerate to be reused, wastage rate��2.4%, 0.3 cube, magneticsubstance sorbent material needed for every cube of waste water.
Because material of main part is Fe3O4, FeO, Fe. Not only there is good magnetic diffusivity, in waste water, there is again electrochemistry polarity simultaneously, the COD in energy degrading waste water, suspended substance in waste water is had and separates solidifying effect. Magneticsubstance sorbent material specific surface area is huge, and micro-pore structure is enriched, and is a kind of good de-oiling coalescence material, can have certain oily water separation effect in the process of absorption oil removing.
Process program provided by the invention adopts ceramic membrane filter machine to add three-phase water-and-oil separator, adds and efficiently catches poly-water-and-oil separator and remove de-for the oil in waste water, can guarantee the oleaginousness��20mg/L in waste water. This scheme is not only de-except the oil in waste water, moreover it is possible to refiltered oil, oil recovery rate >=90%, this scheme oil-water separation system only needs consumption of power, it is not necessary to add any water treatment agent.
By process program provided by the invention in advance except ash suspended substance and de-oiling, guaranteeing follow-up extracting and dephenolizing, negative pressure ammonia still process carries out smoothly, it is to increase extracting and dephenolizing efficiency, reduces the consumption of extraction agent, reduces the impurity in phenol sodium, it is to increase reclaim the value of product. Improve ammonia nitrogen removal effect simultaneously, reduce ammonia still corrosion, reduce the ammonia still pressure-losses, reduce ammonia still process workshop section energy consumption, it is to increase ammoniacal liquor cleanliness factor, it is to increase ammoniacal liquor is worth. The investment reducing treatment unit for whole system subsequent disposal can get obvious effect.
Claims (1)
1. the method for a pyrolysis of coal destructive distillation wastewater treatment, it is characterized in that: adopt magneticsubstance as the sorbent material of suspended substance, ash suspended substance in waste water is had that strong absorption is poly-catches ability, magneticsubstance is dropped into waste water, slowly stir, again magneticsubstance and waste water mixture are passed through high-strength magnetic field, magneticsubstance suction is caught thus is separated with waste water by the magneticsubstance having adsorbed ash suspended substance by magnetic field, arrive the de-object except ash in waste water, specifically undertaken by technical process, its technical process is that wastewater disposal basin �� acidification pool �� magnetic force absorption is except the de-COD �� A/O biochemical treatment �� filtration �� Treated sewage reusing of ash content suspended substance �� flocculation sediment oil removal �� coalescent oily water separation de-oiling �� three-phase water-and-oil separator �� filtration �� extracting and dephenolizing �� negative pressure ammonia still process �� electrooxidation, wherein magneticsubstance sorbent material can regenerate and reuse.
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| CN104944691B (en) * | 2015-06-10 | 2017-07-14 | 张世文 | The semi-coke wastewater processing regeneration concentrated based on film and resource recycling device |
| CN108147612B (en) * | 2016-12-05 | 2021-01-26 | 中国科学院大连化学物理研究所 | Method for treating coal carbonization wastewater |
| CN111943335A (en) * | 2019-05-17 | 2020-11-17 | 安徽伊尔思环境科技有限公司 | Sewage precipitator and application method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654316A (en) * | 2009-09-27 | 2010-02-24 | 新奥科技发展有限公司 | Method for processing coal gasification wastewater |
| CN103232135A (en) * | 2013-04-12 | 2013-08-07 | 北京万邦达环保技术股份有限公司 | Treatment system and treatment method for coal-to-liquid wastewater |
| KR101372416B1 (en) * | 2013-04-10 | 2014-03-11 | 한국원자력연구원 | Multiple feeding of influent in the bio-electrochemical waste-water treating apparatus and treatment method of waste-water using the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654316A (en) * | 2009-09-27 | 2010-02-24 | 新奥科技发展有限公司 | Method for processing coal gasification wastewater |
| KR101372416B1 (en) * | 2013-04-10 | 2014-03-11 | 한국원자력연구원 | Multiple feeding of influent in the bio-electrochemical waste-water treating apparatus and treatment method of waste-water using the same |
| CN103232135A (en) * | 2013-04-12 | 2013-08-07 | 北京万邦达环保技术股份有限公司 | Treatment system and treatment method for coal-to-liquid wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 磁絮凝技术深度处理焦化废水的试验研究;张哲;《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》;20121015;第5-7、13、23、33和49页 * |
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Effective date of registration: 20191202 Address after: Room 602, unit 2, building 12, Fenghuang villa, Muke East Road, Pingxiang Development Zone, Jiangxi Province Patentee after: Huang Hongan Address before: 14 building 337000, economic and trade building, Pingxiang Economic Development Zone, Jiangxi Patentee before: PINGXIANG CITY TONGKAI TECHNOLOGY CO.,LTD. |
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