CN101723528A - Complexing centrifugal extraction method of high-concentration phenolic wastewater - Google Patents
Complexing centrifugal extraction method of high-concentration phenolic wastewater Download PDFInfo
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- CN101723528A CN101723528A CN200910227975A CN200910227975A CN101723528A CN 101723528 A CN101723528 A CN 101723528A CN 200910227975 A CN200910227975 A CN 200910227975A CN 200910227975 A CN200910227975 A CN 200910227975A CN 101723528 A CN101723528 A CN 101723528A
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Abstract
The invention provides a complexing centrifugal extraction method of high-concentration phenolic wastewater, which utilizes an efficient extractor and a back wash extractor to process high-concentration phenolic wastewater. The method of the invention comprises the following steps: 1) pretreating the phenolic wastewater; 2) leading the extracting agent to flow to each extractor in turn; 3) leading the phenolic wastewater to flow reversely into each extractor which is flown with extracting agent for extraction reaction; 4) discharging the wastewater from the extractor after dephenolizing; 5) discharging the extracting agent rich in phenol from the extractor which is filled with wastewater firstly; 6) leading the extracting agent rich in phenol to flow reversely to each back wash extractor, leading the thin alkali solution to flow into each back wash extractor which is flown with extracting agent rich in phenol for backextraction reaction; and 7) discharging the phenolate generated in the backextraction reaction from the back wash extractor which is flown with extracting agent rich in phenol firstly, and discharging the extracting agent after backextraction from the back wash extractor which is flown with thin alkali solution. The invention has low cost, small floor area, great flexibility of device operation, low consumption, the phenol content of the processed water is reduced to below 200ppm, the phenol removal rate is above 99%, thus achieving the biochemical treatment water quality standard, recovering the phenol in the waste water in the form of phenolate to return to the system for reuse, and lowering environmental pollution.
Description
Technical field
The present invention relates to a kind of treatment process of high-concentration phenolic wastewater, the present invention adopts reversible complexometry extracting and dephenolizing technology, utilize efficient extractor and back wash extractor to handle to containing the high-concentration phenolic wastewater of phenol more than 15000ppm, making water after the processing contain phenol reduces to below the 200ppm, the phenol clearance reaches the biochemical treatment water quality standard more than 99%.Simultaneously the phenol in the waste water is reclaimed with the phenates form, retrieval system is utilized again.
Background technology
In the industrial production, will contain the waste water that phenol concentration is higher than 1000mg/L usually and be called high-concentration phenolic wastewater, be called the lower concentration phenolic wastewater less than the waste water of 1000mg/L.For phenolic wastewater, should make it contain the phenol amount on the one hand and descend significantly, reduce pollution to environment, then should reclaim the valuable material in the waste water on the other hand as far as possible, it is turned waste into wealth.
At present industrial phenol water disposal method commonly used has biochemical process, absorption method and solvent extration.The biochemical process Phenol-Containing Wastewater Treatment, investment is big, and floor space is big, only be adapted to contain the waste water of phenol amount less than 300ppm, and phenols can not be recycled; The absorption method Phenol-Containing Wastewater Treatment is suitable for handling and contains the lower waste water of phenol amount, and required resin will often be changed; Simultaneously, biochemical process and absorption method all need phenolic wastewater is carried out pre-treatment.The extraction process Phenol-Containing Wastewater Treatment, investment and floor space are all smaller, need not carry out pre-treatment, and it is unrestricted that water inlet is contained the phenol amount, can handle to contain the waste water that the phenol amount is higher than 1000ppm, and phenols can be recycled.The extraction agent that adopts in the solvent extration has benzene, heavy benzol, light oil, heavy naptha, N-BUTYL ACETATE, isopropyl ether, N
503Deng, but these traditional extraction agent major parts are lower to the partition ratio of phenols, and loss is big, and treatment effect is undesirable, even can cause secondary pollution.
Summary of the invention
The objective of the invention is to use the complexing centrifugal extraction method that high-concentration phenolic wastewater is handled, make to contain phenol and reduce to below the 200ppm, the phenol clearance reaches the biochemical treatment water quality standard more than 99%.
The complexing centrifugal extraction method of high-concentration phenolic wastewater of the present invention is finished according to following steps:
1), phenolic wastewater is added the vitriol oil carries out pre-treatment, adjusting pH value to 4～5;
2), the extraction agent in the extraction agent groove is flowed successively in the centrifugal extractor of a plurality of serial connections through the extraction agent pump;
3), pretreated phenolic wastewater flows into the centrifugal extractor that each has flowed into extraction agent successively through intake pump is reverse, and extractive reaction takes place in centrifugal extractor;
4), dephenolize waste water is discharged from the centrifugal extractor that injects extraction agent at first;
5), the rich phenol extraction agent of finishing extractive reaction is discharged from the centrifugal extractor that injects phenolic wastewater at first;
6), rich phenol extraction agent flows into the centrifugal back wash extractor of a plurality of serial connections successively, dilute alkaline soln flows to each centrifugal back wash extractor that has flowed into rich phenol extraction agent successively through pump is reverse, and the back extraction reaction takes place;
7), the phenates that generates of back extraction reaction discharges from the centrifugal back wash extractor that flows into rich phenol extraction agent at first, recycles, and discharges from the centrifugal back wash extractor that flows into dilute alkaline soln at first through the extraction agent of back extraction reaction, gets back in the extraction agent groove recycling.
Further, the extraction agent of the present invention's use can be heavy benzol, light oil, heavy naptha, N-BUTYL ACETATE, isopropyl ether or N
503Deng.
The sig water that the present invention uses can be the dilute alkaline soln that is mixed with yellow soda ash, sodium bicarbonate or salt of wormwood, and the mass percentage concentration of sig water is 5～10%.
The present invention compared with prior art has the following advantages;
1) the extracting and dephenolizing technology with common is different, and the present invention has introduced complexing mechanism, and the extracting and dephenolizing coefficient is very big, and positive backward reaction all is easy to carry out;
2) solubleness of extraction agent in water is very little, and the solvent loss amount can be controlled in about 2/10000ths under the normal operating condition, can not cause secondary pollution to waste water;
3) reusability of extraction agent is good, and the rich phenol solvent of recycling valuable material in the waste water can form extraction agent again after the alkali lye back extraction;
4) main equipment of the present invention adopts the efficient centrifugal extractor, facility compact, and unit volume throughput height, the solvent hold-up amount is little, and the start-stop car is convenient, is easy to reach steady state operation, can realize continuously and periodical operation.
Description of drawings
Fig. 1 is the sewage treatment technology process figure of the complexing centrifugal extraction method of high-concentration phenolic wastewater of the present invention.
Embodiment
Embodiment 1
As Fig. 1, the high-concentration phenolic wastewater that will contain phenol 15000ppm feeds in the equalizing tank, adds the vitriol oil and carries out pre-treatment, regulates pH value to 4.
With the extraction agent N in the extraction agent groove
503Flow to No. 1, No. 2, No. 3 extractors successively through the extraction agent pump; With pretreated pH value be 4 phenolic wastewater through intake pump, the reverse inflow successively No. 3, No. 2 flowed into for No. 1 in the extractor of extraction agent, and extractive reaction takes place in extractor.
Waste water after the dephenolize is discharged from No. 1 extractor, detects to contain phenol 154ppm.Rich phenol extraction agent behind the generation extractive reaction is discharged from No. 3 extractors.
Rich phenol extraction agent flows into No. 1, No. 2 and No. 3 back wash extractors successively, and the yellow soda ash dilute alkaline soln with 5% through the reverse successively inflow of pump No. 3, No. 2 and No. 1 back wash extractor the back extraction reaction takes place.
The sodium phenolate that the back extraction reaction generates is discharged from No. 1 back wash extractor, recycles, through the extraction agent N of back extraction reaction
503Enter the extraction agent groove from No. 3 back wash extractors, recycle.
As Fig. 1, the high-concentration phenolic wastewater that will contain phenol 17000ppm feeds in the equalizing tank, adds the vitriol oil and carries out pre-treatment, regulates pH value to 5.
Extraction agent heavy benzol in the extraction agent groove is flowed to No. 1, No. 2, No. 3 extractors successively through the extraction agent pump; With pretreated pH value be 5 phenolic wastewater through intake pump, the reverse inflow successively No. 3, No. 2 flowed into for No. 1 in the extractor of extraction agent, and extractive reaction takes place in extractor.
Waste water after the dephenolize is discharged from No. 1 extractor, detects to contain phenol 166ppm.Rich phenol extraction agent behind the generation extractive reaction is discharged from No. 3 extractors.
Rich phenol extraction agent flows into No. 1, No. 2 and No. 3 back wash extractors successively, and the sodium bicarbonate dilute alkaline soln with 10% through the reverse successively inflow of pump No. 3, No. 2 and No. 1 back wash extractor the back extraction reaction takes place.
The sodium phenolate that the back extraction reaction generates is discharged from No. 1 back wash extractor, recycles, and the extraction agent heavy benzol that reacts through back extraction enters the extraction agent groove from No. 3 back wash extractors, recycles.
Claims (3)
1. the complexing centrifugal extraction method of high-concentration phenolic wastewater is characterized in that finishing according to following steps:
1), phenolic wastewater is added the vitriol oil carries out pre-treatment, adjusting pH value to 4～5;
2), the extraction agent in the extraction agent groove is flowed successively in the centrifugal extractor of a plurality of serial connections through the extraction agent pump;
3), pretreated phenolic wastewater flows into the centrifugal extractor that each has flowed into extraction agent successively through intake pump is reverse, and extractive reaction takes place in centrifugal extractor;
4), dephenolize waste water is discharged from the centrifugal extractor that injects extraction agent at first;
5), the rich phenol extraction agent of finishing extractive reaction is discharged from the centrifugal extractor that injects phenolic wastewater at first;
6), rich phenol extraction agent flows into the centrifugal back wash extractor of a plurality of serial connections successively, dilute alkaline soln flows to each centrifugal back wash extractor that has flowed into rich phenol extraction agent successively through pump is reverse, and the back extraction reaction takes place;
7), the phenates that generates of back extraction reaction discharges from the centrifugal back wash extractor that flows into rich phenol extraction agent at first, recycles, and discharges from the centrifugal back wash extractor that flows into dilute alkaline soln at first through the extraction agent of back extraction reaction, gets back in the extraction agent groove recycling.
2. the complexing centrifugal extraction method of high-concentration phenolic wastewater according to claim 1 is characterized in that described extraction agent is a kind of among heavy benzol, light oil, heavy naptha, N-BUTYL ACETATE, isopropyl ether or the N503.
3. the complexing centrifugal extraction method of high-concentration phenolic wastewater according to claim 1 is characterized in that described sig water is the dilute alkaline soln that is mixed with yellow soda ash, sodium bicarbonate or salt of wormwood, and the mass percentage concentration of sig water is 5～10%.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103818982A (en) * | 2014-03-13 | 2014-05-28 | 中钢集团鞍山热能研究院有限公司 | Centrifugal extracting wastewater dephenolization technology |
| CN103880242A (en) * | 2014-03-13 | 2014-06-25 | 中钢集团鞍山热能研究院有限公司 | Advanced treatment process of coal chemical industry wastewater |
| CN104163524A (en) * | 2014-08-27 | 2014-11-26 | 江苏天成生化制品有限公司 | Method for treating phenol-containing wastewater in gas generator |
| CN108840389A (en) * | 2018-07-25 | 2018-11-20 | 合肥中亚环保科技有限公司 | A kind of novel pre-extracted system |
| CN110117034A (en) * | 2018-02-06 | 2019-08-13 | 广州中国科学院沈阳自动化研究所分所 | A kind of method of Centrifugical extraction high-concentration phenolic wastewater and its recycling |
| CN110498468A (en) * | 2019-07-31 | 2019-11-26 | 江苏金博源环保科技有限公司 | Phenolic wastewater treatment extraction tower and stripping column Processes and apparatus |
| CN114956395A (en) * | 2021-02-24 | 2022-08-30 | 广州中国科学院沈阳自动化研究所分所 | Device and method for treating high-concentration phenol-containing wastewater by combining centrifugal extraction and electrocatalysis |
-
2009
- 2009-12-04 CN CN200910227975A patent/CN101723528A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103818982A (en) * | 2014-03-13 | 2014-05-28 | 中钢集团鞍山热能研究院有限公司 | Centrifugal extracting wastewater dephenolization technology |
| CN103880242A (en) * | 2014-03-13 | 2014-06-25 | 中钢集团鞍山热能研究院有限公司 | Advanced treatment process of coal chemical industry wastewater |
| CN103880242B (en) * | 2014-03-13 | 2015-09-30 | 中钢集团鞍山热能研究院有限公司 | A kind of coal chemical industrial waste water advanced treatment process |
| CN104163524A (en) * | 2014-08-27 | 2014-11-26 | 江苏天成生化制品有限公司 | Method for treating phenol-containing wastewater in gas generator |
| CN110117034A (en) * | 2018-02-06 | 2019-08-13 | 广州中国科学院沈阳自动化研究所分所 | A kind of method of Centrifugical extraction high-concentration phenolic wastewater and its recycling |
| CN108840389A (en) * | 2018-07-25 | 2018-11-20 | 合肥中亚环保科技有限公司 | A kind of novel pre-extracted system |
| CN110498468A (en) * | 2019-07-31 | 2019-11-26 | 江苏金博源环保科技有限公司 | Phenolic wastewater treatment extraction tower and stripping column Processes and apparatus |
| CN114956395A (en) * | 2021-02-24 | 2022-08-30 | 广州中国科学院沈阳自动化研究所分所 | Device and method for treating high-concentration phenol-containing wastewater by combining centrifugal extraction and electrocatalysis |
| CN114956395B (en) * | 2021-02-24 | 2023-08-11 | 广州中国科学院沈阳自动化研究所分所 | Device and method for treating high-concentration phenol-containing wastewater by centrifugal extraction and electrocatalytic combination |
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