CN103771621A - De-oiling treatment method for sewage of oil refinery - Google Patents
De-oiling treatment method for sewage of oil refinery Download PDFInfo
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- CN103771621A CN103771621A CN201410024296.0A CN201410024296A CN103771621A CN 103771621 A CN103771621 A CN 103771621A CN 201410024296 A CN201410024296 A CN 201410024296A CN 103771621 A CN103771621 A CN 103771621A
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Abstract
The invention provides a de-oiling treatment method for sewage of an oil refinery. The de-oiling treatment method comprises the following steps: standing for 12-24 hours; after carrying out oil-water separation, removing an upper-layer oil phase; adding a demulsifying agent into a lower-layer water phase, wherein the adding amount of the demulsifying agent is 3-6mg in each liter of wastewater; agitating for 30-80 minutes and standing for 10-20 hours; carrying out the oil-water separation to remove the upper-layer oil phase; then adding the demulsifying agent into the lower-layer water phase, wherein the adding amount of the demulsifying agent is 1-3mg in each liter of the wastewater; standing for 10-20 hours and carrying out the oil-water separation to remove the upper-layer oil phase; finally, carrying out micro-filtration membrane separation on the lower-layer water phase and discharging water, wherein the demulsifying agent is formed by mixing octadecanol polyoxyethylene polyoxypropylene blocked ester and alkyl pyridinium bromide in a mol ratio of (1-5) to 1. According to the de-oiling treatment method, the method of adding the demulsifying agent twice and standing is adopted so that oil in the sewage can be collected; the de-oiling rate of the operation for two times can be up to more than 95%; finally, the micro-filtration membrane treatment is carried out and the de-oiling rate can be close to 100%.
Description
Technical field
The invention belongs to technical field of sewage, be specifically related to a kind of sewage from oil refinery treatment process of deoiling.
Background technology
Along with the development of petroleum industry, the viscous crude in the many oil fields of China is exploited; In its recovery process, produce a large amount of condensed oil sewages.This oil content of wastewater is high, mechanical impurity many (clay, Iron sulfuret, bacterium remains etc.), hardness is higher, in addition with the contained naturally occurring emulsifying agent of viscous crude as colloid, after organic acids etc. combine, very easily emulsification, forms the emulsion that profit is inlayed layer by layer, makes its purifying treatment become very difficult.Therefore be in the processing key of oily(waste)water the method for deoiling, initial oil removing thinking is placed in manpower, mechanical oil removing more.Oil slick naked eyes are visible, just expect reaching by modes such as manpower salvaging or mechanical oil skimmings the separation of profit.The method is simple to operate, can remove the oil slick part in water, but cure the symptoms, not the disease, and need a large amount of artificial and energy consumptions, and oil removing is not thorough.Conventionally adopt flocculation sediment oil removing, inorganic flocculating agent is easy to preparation, easy to use, can effectively make the liquid structure of emulsification shape destroy, and separates from water to reach oil in water emulsion composition in water.But the use of a large amount of inorganic flocculating agents has again the problems such as the waste water of increasing saltiness, waste residue growing amount is large, medicament usage quantity is large.
Summary of the invention
The object of the invention is to provide a kind of sewage from oil refinery treatment process of deoiling, this treatment process is simple to operation, and the oil energy recycling of removing, and has avoided the waste of resource.
To achieve these goals, the technical solution used in the present invention is: a kind of sewage from oil refinery treatment process of deoiling, comprises the steps:
1) waste water is left standstill to 12 ~ 24 h after oily water separation, remove upper oil phase;
2) in lower floor's water, add emulsion splitter, the add-on of emulsion splitter is in every liter of waste water, to add 3 ~ 6 mg, stirs 30 ~ 80 min, leaves standstill 10 ~ 20 h, and oily water separation, removes upper oil phase;
3) again in lower floor's water, add emulsion splitter, the add-on of emulsion splitter is in every liter of waste water, to add 1 ~ 3 mg, leaves standstill 10 ~ 20 h, and oily water separation, removes upper oil phase;
4) lower floor's water step 3) being obtained carries out microfiltration membrane separation, water outlet;
Wherein said emulsion splitter be octadecanol polyoxyethylene polyoxypropylene block type ether and cetylpyridinium bromide in molar ratio 1 ~ 5:1 mix.
Described emulsion splitter be octadecanol polyoxyethylene polyoxypropylene block type ether and cetylpyridinium bromide in molar ratio 3:1 mix.
Step 2) described in the add-on of emulsion splitter be in every liter of waste water, to add 4.8 mg.
Beneficial effect: the invention provides a kind of sewage from oil refinery treatment process of deoiling, first remove macromole oil slick by stratification, this step can be removed the main oil in sewage, remaining is a small amount of oil that forms emulsion with sewage, the present invention adopts and adds emulsion splitter and then standing method for twice, can collect the oil content in sewage, and twice operation oil removal rate can be up to more than 95%, finally, by microfiltration membrane processing, oil removal rate can approach 100%.
Embodiment
Wastewater Sample in following examples is taken from Nantong refinery, and water sample first removes through simple filtration processings of deoiling after major impurity, and filtering water quality oil-contg is afterwards 90 ~ 120mg/L.
Embodiment 1:
A kind of sewage from oil refinery treatment process of deoiling, comprises the steps:
1) waste water is left standstill to 12 h after oily water separation, remove upper oil phase;
2) in lower floor's water, add emulsion splitter, the add-on of emulsion splitter is in every liter of waste water, to add 4.8 mg, stirs 55 min, leaves standstill 15 h, and oily water separation, removes upper oil phase;
3) again in lower floor's water, add emulsion splitter, the add-on of emulsion splitter is in every liter of waste water, to add 2 mg, leaves standstill 15 h, and oily water separation, removes upper oil phase;
4) lower floor's water step 3) being obtained carries out microfiltration membrane separation, water outlet;
Described emulsion splitter be octadecanol polyoxyethylene polyoxypropylene block type ether and cetylpyridinium bromide in molar ratio 3:1 mix, detecting water outlet oil-contg is 0.05 mg/L.
Embodiment 2:
A kind of sewage from oil refinery treatment process of deoiling, comprises the steps:
1) waste water is left standstill to 24 h after oily water separation, remove upper oil phase;
2) in lower floor's water, add emulsion splitter, the add-on of emulsion splitter is in every liter of waste water, to add 3 mg, stirs 30min, leaves standstill 20 h, and oily water separation, removes upper oil phase;
3) again in lower floor's water, add emulsion splitter, the add-on of emulsion splitter is in every liter of waste water, to add 1 mg, leaves standstill 20 h, and oily water separation, removes upper oil phase;
4) lower floor's water step 3) being obtained carries out microfiltration membrane separation, water outlet;
Wherein said emulsion splitter be octadecanol polyoxyethylene polyoxypropylene block type ether and cetylpyridinium bromide in molar ratio 1:1 mix, detecting water outlet oil-contg is 0.18 mg/L.
Embodiment 3:
A kind of sewage from oil refinery treatment process of deoiling, comprises the steps:
1) waste water is left standstill to 18 h after oily water separation, remove upper oil phase;
2) in lower floor's water, add emulsion splitter, the add-on of emulsion splitter is in every liter of waste water, to add 6 mg, stirs 80min, leaves standstill 10 h, and oily water separation, removes upper oil phase;
3) again in lower floor's water, add emulsion splitter, the add-on of emulsion splitter is to add 3mg in every liter of waste water, leaves standstill 10 h, and oily water separation, removes upper oil phase;
4) lower floor's water step 3) being obtained carries out microfiltration membrane separation, water outlet;
Wherein said emulsion splitter be octadecanol polyoxyethylene polyoxypropylene block type ether and cetylpyridinium bromide in molar ratio 5:1 mix, detecting water outlet oil-contg is 0.14 mg/L.
Claims (3)
1. the sewage from oil refinery treatment process of deoiling, is characterized in that comprising the steps:
1) waste water is left standstill to 12 ~ 24 h after oily water separation, remove upper oil phase;
2) in lower floor's water, add emulsion splitter, the add-on of emulsion splitter is in every liter of waste water, to add 3 ~ 6 mg, stirs 30 ~ 80 min, leaves standstill 10 ~ 20 h, and oily water separation, removes upper oil phase;
3) again in lower floor's water, add emulsion splitter, the add-on of emulsion splitter is in every liter of waste water, to add 1 ~ 3 mg, leaves standstill 10 ~ 20 h, and oily water separation, removes upper oil phase;
4) lower floor's water step 3) being obtained carries out microfiltration membrane separation, water outlet;
Wherein said emulsion splitter be octadecanol polyoxyethylene polyoxypropylene block type ether and cetylpyridinium bromide in molar ratio 1 ~ 5:1 mix.
2. a kind of sewage from oil refinery according to claim 1 treatment process of deoiling, is characterized in that: described emulsion splitter be octadecanol polyoxyethylene polyoxypropylene block type ether and cetylpyridinium bromide in molar ratio 3:1 mix.
3. a kind of sewage from oil refinery according to claim 1 treatment process of deoiling, is characterized in that: step 2) described in the add-on of emulsion splitter be in every liter of waste water, to add 4.8 mg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410024296.0A CN103771621A (en) | 2014-01-20 | 2014-01-20 | De-oiling treatment method for sewage of oil refinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410024296.0A CN103771621A (en) | 2014-01-20 | 2014-01-20 | De-oiling treatment method for sewage of oil refinery |
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| CN103771621A true CN103771621A (en) | 2014-05-07 |
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| CN201410024296.0A Withdrawn CN103771621A (en) | 2014-01-20 | 2014-01-20 | De-oiling treatment method for sewage of oil refinery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110394A (en) * | 2015-09-23 | 2015-12-02 | 昆明有色冶金设计研究院股份公司 | Chemical agent for treatment of emulsified oil wastewater generated from air compressor |
| CN107572630A (en) * | 2017-08-31 | 2018-01-12 | 新奥环保技术有限公司 | A kind of breaking device and method |
| CN112138430A (en) * | 2020-09-07 | 2020-12-29 | 同济大学 | Magnetic nanorod demulsifier, preparation method thereof and method for treating nanoemulsion by using magnetic nanorod demulsifier |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101565251A (en) * | 2009-05-26 | 2009-10-28 | 北京清大国华环保科技有限公司 | Technique for using composite demulsification-membrane method to treat high-concentration emulsified liquid waste water and device |
| CN203144205U (en) * | 2013-04-09 | 2013-08-21 | 中国石油化工股份有限公司 | Pressure differential emulsion breaking device of oilfield sewage |
-
2014
- 2014-01-20 CN CN201410024296.0A patent/CN103771621A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101565251A (en) * | 2009-05-26 | 2009-10-28 | 北京清大国华环保科技有限公司 | Technique for using composite demulsification-membrane method to treat high-concentration emulsified liquid waste water and device |
| CN203144205U (en) * | 2013-04-09 | 2013-08-21 | 中国石油化工股份有限公司 | Pressure differential emulsion breaking device of oilfield sewage |
Non-Patent Citations (2)
| Title |
|---|
| 中国大百科全书总编辑委员会: "《中国大百科全书化学（1-2册）》", 31 January 1992, article "破乳剂", pages: 802 * |
| 李正要等: "乳化液废水处理方法", 《北京科技大学学报》, vol. 25, no. 3, 30 June 2003 (2003-06-30), pages 203 - 206 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110394A (en) * | 2015-09-23 | 2015-12-02 | 昆明有色冶金设计研究院股份公司 | Chemical agent for treatment of emulsified oil wastewater generated from air compressor |
| CN107572630A (en) * | 2017-08-31 | 2018-01-12 | 新奥环保技术有限公司 | A kind of breaking device and method |
| CN107572630B (en) * | 2017-08-31 | 2023-10-03 | 新地环保技术有限公司 | Demulsification device and method |
| CN112138430A (en) * | 2020-09-07 | 2020-12-29 | 同济大学 | Magnetic nanorod demulsifier, preparation method thereof and method for treating nanoemulsion by using magnetic nanorod demulsifier |
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Application publication date: 20140507 |