CN106698776A - Dephenolizing method for phenol-containing wastewater - Google Patents
Dephenolizing method for phenol-containing wastewater Download PDFInfo
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- CN106698776A CN106698776A CN201510530265.7A CN201510530265A CN106698776A CN 106698776 A CN106698776 A CN 106698776A CN 201510530265 A CN201510530265 A CN 201510530265A CN 106698776 A CN106698776 A CN 106698776A
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Abstract
The invention provides a dephenolizing method for phenol-containing wastewater. The dephenolizing method for the phenol-containing wastewater comprises the following steps: a, mixing phenol-containing wastewater and an extracting agent which takes methyl terschyl ether as a main body and extracting in an extracting tower or a multi-stage mixer-settler to obtain a solvent phase and a raffinate aqueous phase; b, rectifying the solvent by a rectification process and recycling the solvent and coarse phenol, wherein the rectifying tower theoretical stage is 15 to 25, the reflux ratio is 0.1 to 1, the operating pressure is 0.1 to 0.91 MPa, the tower top operating temperature is 50 to 90 DEG C, and the tower bottom temperature is 150 to 300 DEG C; c, distilling the raffinate aqueous phase by a distillation solvent recovery process and recycling residual extracting solvent, wherein the tower top temperature is 62 to 90 DEG C, the tower bottom temperature is 100 to 130 DEG C, and the amount of a material which is distilled from the top of the tower is 1.5 to 5 percent of that of a fed material; d, recycling the extracting solvent. The dephenolizing method for the phenol-containing wastewater has the beneficial effects that the process flow is simple; the equipment investment is low; the solvent recycling energy consumption is low; the recycling rate of the phenol is high.
Description
Technical field
The present invention relates to a kind of phenol wastewater dephenolization method.
Background technology
In coal carbonization inferior, drying and gasification, substantial amounts of gasification waste water can be produced, contained
The pollutants such as the phenols of high concentration.Phenols has stronger bio-toxicity, endangers larger, meanwhile, phenols
It is also important industrial chemicals.Thus, the aldehydes matter in coal chemical industrial waste water is efficiently removed and reclaims,
Not only there is environment protection significance, it may have certain economic implications.
At present, in commercial plant, liquid-liquid extraction is most widely used, stability and maturity highest
Dephenolize means.For coal chemical industrial waste water, the extractant commonly used at present has diisopropyl ether, methyl tert-butyl
Base ketone, crude benzol, middle oil etc..But these extractants have its open defect, such as diisopropyl ether pair
The extracting power of polyhydric phenols is weaker, and hexone energy consumption when solvent recovery is carried out is too high, slightly
Not only extraction yield is low for benzene and middle oil, and can only using flow complexity, have the stripping process of secondary pollution come
Recycling design etc..
To sum up, the Coal Chemical Industry that a kind of low cost, flow are simple and extraction efficiency is high is badly in need of at present useless containing phenol
The extracting and dephenolizing technology of water.
The content of the invention
In order to solve the problems of the prior art, the present invention provides a kind of extraction of Coal Chemical Industry phenol wastewater
Dephenolization method, so that high efficiency, low energy consumption to coal chemical industrial waste water carry out extracting and dephenolizing.
The invention provides a kind of phenol wastewater dephenolization method, including step：
A, phenol wastewater is mixed with based on the extractant of methyl- tert the eleventh of the twelve Earthly Branches base ether, in extraction tower or many
Extracted in level mixer-settler extractor, obtain solvent phase and raffinate water phase；
B then by solvent with 15-25 grades of rectifying column theoretical stage, reflux ratio 0.1-1, operation pressure
The rectifying that power 0.1-0.91MPa, tower top operation temperature are 50-90 DEG C, column bottom temperature is 150-300 DEG C
Technique rectifying, recycling design and crude phenols；
C, raffinate water is steamed with 62-90 DEG C of tower top temperature, 100-130 DEG C of column bottom temperature, tower top
Inventory is about the distillating recovering solvent technique distillation of the 1.5-5% of charging, reclaims remaining extraction solvent；
D, recovery extractant.
As a further improvement on the present invention, when its extraction equipment used is extraction tower, by waste water and extraction
Take agent to be pumped into extraction tower from the top and bottom of extraction tower respectively, carry out counter-current extraction, obtain solvent
Mutually with raffinate water phase；When extraction equipment used is mixer-settler extractor, waste water and extractant are respectively from first
Added in level and afterbody mixer-settler extractor.
As a further improvement on the present invention, its extraction temperature is 60-70 DEG C, extracts pH3-9.5, extraction
It is 1: 20-1: 1 that solvent is taken with the volume ratio containing phenol coal chemical industrial waste water, and the theoretical stage of extraction is 1-10
Level.
As a further improvement on the present invention, its extraction pH is 5-8.
The beneficial effects of the invention are as follows：Its technological process is simple, and equipment investment is few, solvent recovery energy consumption
Low, the organic efficiency of phenol is high, and can be while efficient removal petroleum hydrocarbon, tar pollutant.Using
The present invention can more effectively mitigate the load of subsequent biochemical section, it is ensured that the qualified discharge of waste water is returned
With.
Specific embodiment
The invention discloses a kind of phenol wastewater dephenolization method, including step：
A, phenol wastewater is mixed with based on the extractant of methyl- tert the eleventh of the twelve Earthly Branches base ether, in extraction tower or many
Extracted in level mixer-settler extractor, obtain solvent phase and raffinate water phase；
B then by solvent with 15-25 grades of rectifying column theoretical stage, reflux ratio 0.1-1, operation pressure
The rectifying that power 0.1-0.91MPa, tower top operation temperature are 50-90 DEG C, column bottom temperature is 150-300 DEG C
Technique rectifying, recycling design and crude phenols；
C, raffinate water is steamed with 62-90 DEG C of tower top temperature, 100-130 DEG C of column bottom temperature, tower top
Inventory is about the distillating recovering solvent technique distillation of the 1.5-5% of charging, reclaims remaining extraction solvent；
D, recovery extractant.
As a further improvement on the present invention, when its extraction equipment used is extraction tower, by waste water and extraction
Take agent to be pumped into extraction tower from the top and bottom of extraction tower respectively, carry out counter-current extraction, obtain solvent
Mutually with raffinate water phase；When extraction equipment used is mixer-settler extractor, waste water and extractant are respectively from first
Added in level and afterbody mixer-settler extractor.
As a further improvement on the present invention, its extraction temperature is 60-70 DEG C, extracts pH3-9.5, extraction
It is 1: 20-1: 1 that solvent is taken with the volume ratio containing phenol coal chemical industrial waste water, and the theoretical stage of extraction is 1-10
Level.
As a further improvement on the present invention, its extraction pH is 5-8.
Above content is that to combine specific preferred embodiment made for the present invention further specifically
It is bright, it is impossible to assert that specific implementation of the invention is confined to these explanations.For technology belonging to the present invention
For the those of ordinary skill in field, without departing from the inventive concept of the premise, if can also make
Simple deduction or replace are done, protection scope of the present invention should be all considered as belonging to.
Claims (4)
1. a kind of phenol wastewater dephenolization method, it is characterised in that：Including step：
A, phenol wastewater is mixed with based on the extractant of methyl- tert the eleventh of the twelve Earthly Branches base ether, in extraction tower or many
Extracted in level mixer-settler extractor, obtain solvent phase and raffinate water phase；
B then by solvent with 15-25 grades of rectifying column theoretical stage, reflux ratio 0.1-1, operation pressure
Power 0.1-0.91MPa, tower top operation temperature are 50-90 DEG C, column bottom temperature is 150-300 DEG C
Rectification process rectifying, recycling design and crude phenols；
C, by raffinate water with 62-90 DEG C of tower top temperature, 100-130 DEG C of column bottom temperature, tower top steaming thing
Doses is about the distillating recovering solvent technique distillation of the 1.5-5% of charging, reclaims remaining extraction solvent；
D, recovery extractant.
2. phenol wastewater dephenolization method according to claim 1, it is characterised in that：Its extraction used sets
During for for extraction tower, waste water and extractant are pumped into extraction tower from the top and bottom of extraction tower respectively
It is interior, counter-current extraction is carried out, obtain solvent phase and raffinate water phase；Extraction equipment used is clarified for mixing
During device, waste water and extractant are added from the first order and afterbody mixer-settler extractor respectively.
3. phenol wastewater dephenolization method according to claim 1, it is characterised in that：Its extraction temperature is
60-70 DEG C, pH3-9.5 is extracted, extractant is 1 with the volume ratio containing phenol coal chemical industrial waste water:
20-1: 1, the theoretical stage of extraction is 1-10 grades.
4. phenol wastewater dephenolization method according to claim 3, it is characterised in that：It extracts pH
5-8。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510530265.7A CN106698776A (en) | 2015-08-26 | 2015-08-26 | Dephenolizing method for phenol-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510530265.7A CN106698776A (en) | 2015-08-26 | 2015-08-26 | Dephenolizing method for phenol-containing wastewater |
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| CN106698776A true CN106698776A (en) | 2017-05-24 |
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| CN201510530265.7A Pending CN106698776A (en) | 2015-08-26 | 2015-08-26 | Dephenolizing method for phenol-containing wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107739299A (en) * | 2017-11-23 | 2018-02-27 | 魏艳娟 | The refining spearation combined dehydration method and device of mixed phenol |
| CN109019740A (en) * | 2018-07-31 | 2018-12-18 | 大连理工大学 | A kind of sulfolane wastewater treatment method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913718A (en) * | 2010-07-30 | 2010-12-15 | 哈尔滨瑞格能源环境技术发展有限责任公司 | Method for extracting and dephenolizing coal chemical industry wastewater |
| CN102336451A (en) * | 2011-06-17 | 2012-02-01 | 青岛君扬化工科技有限公司 | Coal chemical phenol-containing waste water dephenolization method |
| CN102531255A (en) * | 2010-12-31 | 2012-07-04 | 中国海洋石油总公司 | Treatment method of phenol-containing wastewater |
-
2015
- 2015-08-26 CN CN201510530265.7A patent/CN106698776A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913718A (en) * | 2010-07-30 | 2010-12-15 | 哈尔滨瑞格能源环境技术发展有限责任公司 | Method for extracting and dephenolizing coal chemical industry wastewater |
| CN102531255A (en) * | 2010-12-31 | 2012-07-04 | 中国海洋石油总公司 | Treatment method of phenol-containing wastewater |
| CN102336451A (en) * | 2011-06-17 | 2012-02-01 | 青岛君扬化工科技有限公司 | Coal chemical phenol-containing waste water dephenolization method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107739299A (en) * | 2017-11-23 | 2018-02-27 | 魏艳娟 | The refining spearation combined dehydration method and device of mixed phenol |
| CN109019740A (en) * | 2018-07-31 | 2018-12-18 | 大连理工大学 | A kind of sulfolane wastewater treatment method |
| CN109019740B (en) * | 2018-07-31 | 2021-05-11 | 大连理工大学 | Sulfolane wastewater treatment method |
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