CN101792227B - Process equipment containing polyethyleneglycol dimethyl ether and method - Google Patents
Process equipment containing polyethyleneglycol dimethyl ether and method Download PDFInfo
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- CN101792227B CN101792227B CN2010101356320A CN201010135632A CN101792227B CN 101792227 B CN101792227 B CN 101792227B CN 2010101356320 A CN2010101356320 A CN 2010101356320A CN 201010135632 A CN201010135632 A CN 201010135632A CN 101792227 B CN101792227 B CN 101792227B
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Abstract
The invention discloses process equipment containing polyethyleneglycol dimethyl ether and a method; in the method, first-stage distillation is carried out to high-concentration waste water containing NHD, and then second-stage distillation is carried out, and then distillate fraction after second-stage distillation enters in a product tank after being cooled, and the distillate fraction after first-stage distillation is carried out and low-concentration waste water containing NHD in the production flow carry out pulverized fuel ash adsorption in an adsorption tank; in the method, recovery processing is carried out to the high-concentration NHD waste water, and the low-concentration NHD waste water is discharged after reaching standards, so as to solve the problems of environmental pollution and resource waste owning to discharge of the waste water containing NHD, realize qualified discharge of sewage COD, avoid suppression of a biochemistry system, provide a solving way for realizing clean production of waste water in coal chemical industry and have a certain social benefit; meanwhile, the NHD solvent in the sewage can be recovered, and the cost for gas purification is saved.
Description
Technical field
The present invention relates to a kind of processing of trade effluent, particularly a kind of treatment facility and method that contains NHD (NHD) trade effluent belongs to field of environment engineering technology.
Background technology
NHD is applied to removing of sour gas in purification and Sweet natural gas, oil field gas, refinery gas and the coal gas of producing synthesis gas from coal, especially to CO
2And H
2S has the excellent absorption remove, and also there are outstanding effect and selectivity preferably in aspects such as dehydration, de-oiling.During this technology purification of acidic gas, contain a large amount of NHD in the filtration backwashing water of generation, phlegma, the maintenance wash-down water, its content can reach 3～10% (COD is up to 300000mg/L) usually.Have plenty of the coal pulverizer of being used for to such NHD wastewater treatment at present and prepare coal slurry, the result causes serious waste, and the smell of generation is contaminate environment also; The Sewage treatment systems result that directly enters who has produces serious restraining effect to the biochemical system of postorder, very easily causes sewage exceed standard discharging, contaminate environment.
Ether material has the specific molecule structure, and bearing ethers degradation function mikrobe at occurring in nature only has seldom several kinds, in ethers wastewater biochemical treating processes, shows refractory organics.
NHD (NHD) organic solvent price is higher, is carried in the waste water except environment structure being polluted, also causes simultaneously the certain economic loss.
Summary of the invention
For solving the environmental pollution and the wasting of resources problem that NHD waste water brings that contain of discharging in the production process, the purpose of this invention is to provide a kind of treatment facility and method that contains NHD (NHD) trade effluent.This method can realize recycling to high density NHD waste water, also can realize qualified discharge to the lower concentration NHD waste water of not suitable recycling.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of treatment facility that contains the NHD trade effluent; Comprise the high density water collecting basin; The high density water collecting basin links to each other with the one-level still kettle through the high density pump, and one-level still kettle lower end links to each other with the secondary distillation still, and the secondary distillation still links to each other with the product jar through secondary heat exchanger; One-level still kettle upper end connects the lower concentration water collecting basin through first-class heat exchanger, the lower concentration water collecting basin adsorption tank of ining succession.
Described first-class heat exchanger is provided with the one-level aspirator, and secondary heat exchanger is provided with the secondary aspirator.
Be provided with a plurality of classification whisking appliances in the described adsorption tank.
A kind of NHD processing method of industrial waste water that contains comprises the steps:
(1) the NHD waste water that contains to high density carries out the one-level distillation earlier; Steam fraction; Remaining liquid gets into secondary distillation still secondary distillation, the fraction that secondary distillation goes out through heat exchange, the condensation of secondary heat exchanger, carry dense back entering product jar, residue is sent into boiler and is mixed burning at the bottom of the still behind the secondary distillation;
(2) fraction that steams of one-level gets into the lower concentration water collecting basin through first-class heat exchanger; The NHD waste water that contains of the lower concentration that produces with Production Flow Chart mixes; Mix back waste water and in adsorption tank, carry out flyash absorption; Common Sewage treatment systems will be discharged or got into to waste water COD concentration after will dropping to below the 600mg/L, and the flyash after the absorption is sent into boiler and mixed burning.
Described high density contains NHD waste water and is meant the waste water of NHD content greater than 3wt%; Lower concentration contains NHD waste water and is meant and contains the waste water of NHD content less than 1% (wt%).
The distillation of described one-level-60～-the 90KPa scope in, temperature is controlled at 40～70 ℃.
Described secondary distillation is at 140～160 ℃ ,-60～-the 90KPa scope in.
Adsorption time is no less than 1 hour.Flyash usage ratio scope is not less than 30kg/ ton waste water.PH is neutral in the absorption back.
Flyash is meant the ash (slag) of discharging in the autopneumatolysis stove in the coal slurry gasifier normal productive process, and carbon content is greater than 10%wt%.
The invention has the beneficial effects as follows:
The invention solves environmental pollution and the wasting of resources problem brought in the ethers discharge of wastewater process that contains NHD; Solved of the inhibition of high density ethers waste water to biochemical treatment system; Realize the qualified discharge of sewage, realized that for Coal Chemical Industry the cleaner production of waste water provides solution route, had the certain social benefit; Simultaneously can also reclaim the NHD solvent in the sewage, for cost is practiced thrift in gas purification.
Description of drawings:
Fig. 1 is the existing NHD sewage treatment technology process sketch that contains;
Fig. 2 contains the treatment facility structural representation of NHD trade effluent for the present invention;
Fig. 3 contains the processing technological flow figure of NHD trade effluent for the present invention.
Wherein: 1. high density water collecting basin, 2. lower concentration water collecting basin, 3. one-level still kettle, 4. secondary distillation still, 5. first-class heat exchanger, 6. secondary heat exchanger, 7. one-level aspirator, 8. secondary aspirator, 9. high density pump, 10. adsorption tank, 11. product jars.
Embodiment:
Below in conjunction with accompanying drawing the present invention is further specified:
A kind of treatment facility that contains the NHD trade effluent; Comprise high density water collecting basin 1; High density water collecting basin 1 links to each other with one-level still kettle 3 through high density pump 9, and one-level still kettle 3 lower ends link to each other with secondary distillation still 4, and secondary distillation still 4 links to each other with product jar 11 through secondary heat exchanger 6; One-level still kettle 3 upper ends connect lower concentration water collecting basins 2 through first-class heat exchanger 5, lower concentration water collecting basin 2 adsorption tank 10 of ining succession.
Described first-class heat exchanger 5 is provided with one-level aspirator 7, and secondary heat exchanger 6 is provided with secondary aspirator 8.
Be provided with a plurality of classification whisking appliances in the described adsorption tank 10.
A kind of NHD processing method of industrial waste water that contains:
Contain the NHD high-concentration waste water and mainly be meant desulphurization system backwashing water, desulfurization flashed vapour phlegma, resurgent gases phlegma, wherein NHD content is up to 10% (wt%).This type waste water, is delivered in the one-level still kettle 3 with high density pump 9 and is distilled in high density water collecting basin 1 through pipe-line transportation.Still kettle all uses steam as thermal source, and condensed water is sent to the Chemical Manufacture return water system.The one-level distillation fraction gets into heat exchange in the first-class heat exchanger 5, flows in the lower concentration water collecting basin 2 through the U-shaped pipe after the condensation.The noncondensable gas of carrying secretly in the one-level distillation fraction is extracted and forms out negative pressure by one-level aspirator 5.In the operating process negative pressure of control still kettle-60～-the 90KPa scope in, temperature is controlled at 40～70 ℃.The one-level distillation mainly is that moisture content is steamed.
One-level still kettle kettle base solution gets into and continues distillation in the secondary distillation still.Controlled temperature is at 140～160 ℃ in the operation, negative pressure-60～-the 90KPa scope in.The kettle bottom waste residue of secondary distillation still 4 is delivered to boiler combustion, and fraction is stored in the product jar 11 after secondary heat exchanger 6 condensations, accomplishes the recovery to NHD in the high-concentration waste water.The secondary distillation purpose mainly is that the NHD solvent is steamed.
The generation of Distallation systm negative pressure is penetrated vapour with the control employing and is bled, and also can adopt water jet air ejector or vacuum pump.The adjustment of negative pressure is penetrated vapour vapour extractor air intake valve aperture through operation and is controlled.Temperature is controlled through the aperture of control steam valve.In addition,, prevent residue deposition at the bottom of the still kettle, in the two-step distillation still, also be provided with whisking appliance respectively for realizing distilling effect preferably.
Contain and replace the waste water that is produced when the NHD low concentration wastewater is meant system overhaul, wherein NHD contains quantity not sufficient 1% (COD < 5000mg/>l).This type waste water is through flowing automatically to absorption in the flyash adsorption tank 10 after pipe-line transportation is in the lower concentration water collecting basin 2.Two-stage is set in the adsorption tank stirs pump to realize that absorption fully.Control waste water adsorption time and COD concentration of looking out adsorption tank waste water in adsorption tank adds flyash in the operating process.Realized the qualified discharge of low concentration wastewater through above art breading.
Through after the above-mentioned processing, the waste water COD concentration that goes out the flyash adsorption tank will drop to below the 600mg/L, be in the sink drainage processing power index, and low concentration wastewater is realized qualified discharge after waste disposal plant is handled.
Pulling flyash near state of saturation out from adsorption tank mixes with bituminous coal to deliver to and mixes burning in the fluidized-bed combustion boiler.
Waste water NHD concentration all can adopt distil process to recycle greater than 2.5% o'clock.
Claims (7)
1. one kind contains the NHD processing method of industrial waste water, it is characterized in that, comprises the steps:
(1) NHD (NHD) waste water that contains to high density carries out the one-level distillation earlier; Steam fraction; Remaining liquid gets into secondary distillation still secondary distillation; The fraction that secondary distillation goes out through heat exchange, the condensation of secondary heat exchanger, carry and get into the product jar after dense, residue is sent into boiler and is mixed burning at the bottom of the still behind the secondary distillation;
(2) fraction that steams of one-level gets into the lower concentration water collecting basin through first-class heat exchanger; The NHD waste water that contains of the lower concentration that produces with Production Flow Chart mixes; Mix back waste water and in adsorption tank, carry out flyash absorption; Common Sewage treatment systems will be discharged or got into to waste water COD concentration after will dropping to below the 600mg/L, and the flyash after the absorption is sent into boiler and mixed burning;
Described high density contains NHD waste water and is meant the waste water of NHD content greater than 3wt%; Lower concentration contains NHD waste water and is meant and contains the waste water of NHD content less than 1wt%.
2. according to the described a kind of NHD processing method of industrial waste water that contains of claim 1, it is characterized in that, the distillation of described one-level-60～-the 90KPa scope in, temperature is controlled at 40～70 ℃.
3. according to the described a kind of NHD processing method of industrial waste water that contains of claim 1, it is characterized in that described secondary distillation is at 140～160 ℃ ,-60～-the 90KPa scope in.
4. according to the described a kind of NHD processing method of industrial waste water that contains of claim 1, it is characterized in that flyash usage ratio scope is no less than 30kg/ ton waste water.
5. the used treatment facility that contains the NHD trade effluent of the described method of claim 1; It is characterized in that, comprise the high density water collecting basin, the high density water collecting basin links to each other with the one-level still kettle through the high density pump; One-level still kettle lower end links to each other with the secondary distillation still; The secondary distillation still links to each other with the product jar through secondary heat exchanger, and one-level still kettle upper end is through first-class heat exchanger connection lower concentration water collecting basin, the lower concentration water collecting basin adsorption tank of ining succession.
6. according to the described treatment facility that contains the NHD trade effluent of claim 5, it is characterized in that described first-class heat exchanger is provided with the one-level aspirator, secondary heat exchanger is provided with the secondary aspirator.
7. according to the described treatment facility that contains the NHD trade effluent of claim 5, it is characterized in that, be provided with a plurality of classification whisking appliances in the described adsorption tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101356320A CN101792227B (en) | 2010-03-30 | 2010-03-30 | Process equipment containing polyethyleneglycol dimethyl ether and method |
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| CN2010101356320A CN101792227B (en) | 2010-03-30 | 2010-03-30 | Process equipment containing polyethyleneglycol dimethyl ether and method |
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| CN101792227A CN101792227A (en) | 2010-08-04 |
| CN101792227B true CN101792227B (en) | 2012-01-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103112986A (en) * | 2013-03-14 | 2013-05-22 | 力合科技（湖南）股份有限公司 | Waste liquid treatment system |
| CN103382069B (en) * | 2013-06-26 | 2014-12-10 | 宁波职业技术学院 | Processing method of waste liquid in glycol recycling device |
| CN106892472A (en) * | 2015-12-18 | 2017-06-27 | 中国石油化工股份有限公司 | A kind of NHD method for treating waste liquid |
| CN106167342A (en) * | 2016-09-29 | 2016-11-30 | 环境保护部南京环境科学研究所 | A kind of biological medicine waste water nitrogen phosphorus processing means and processing method thereof |
| CN111204777B (en) * | 2020-01-17 | 2021-05-07 | 中国航空工业集团公司济南特种结构研究所 | Cyanogen bromide industrialized purification process and equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1907941A (en) * | 2006-08-18 | 2007-02-07 | 李强国 | Method of treating hexane diacid preparation waste liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH01224092A (en) * | 1988-03-02 | 1989-09-07 | Nippon Light Metal Co Ltd | Treatment of waste liquor containing adipic acid |
| JP3086564B2 (en) * | 1993-03-31 | 2000-09-11 | 旭化成工業株式会社 | Method for producing adipic acid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1907941A (en) * | 2006-08-18 | 2007-02-07 | 李强国 | Method of treating hexane diacid preparation waste liquid |
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| JP平1-224092A 1989.09.07 |
| JP特开平6-279350A 1994.10.04 |
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