CN1526797A - Solvent extraction process for recovering fuel oil from oil-bearing sludge - Google Patents
Solvent extraction process for recovering fuel oil from oil-bearing sludge Download PDFInfo
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- CN1526797A CN1526797A CNA03106566XA CN03106566A CN1526797A CN 1526797 A CN1526797 A CN 1526797A CN A03106566X A CNA03106566X A CN A03106566XA CN 03106566 A CN03106566 A CN 03106566A CN 1526797 A CN1526797 A CN 1526797A
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Abstract
The present invention is solvent extraction process for recovering fuel oil from oil-bearing sludge from oil field or oil refinery. The solvent extraction process may be a continuous one in a tower or intermittent one in a cauldron inside sealed system. The fractionation is completed in normal pressure. The extracting solvent is light coal tar or other solvent, such as petroleum ether, light oil or C5, and may be reused. The extracting conditions include extracting temperature of 45-55 deg.c and the ratio between oil-bearing sludge and extracting solvent of 1 to 3-5, and dilute acid of 1-3 % concentration may be added for demulsification to speed lamination of extracted oil-bearing sludge. The method of the present invention can recover fuel oil from oil-bearing sludge effectively in low power consumption and solvent consumption.
Description
What the present invention relates to is a kind of method that reclaims oil fuel with solvent extration from oily sludge.
At present, in the crude oil storage tank of each oil recovery factory of China, refinery,, often there is a part of oily sludge at the jar end, this part oily sludge is that the mud in the oilbearing stratum that is carried by oil and water in crude oil strengthening mining process forms, tertiary mixture for oil, water, mud, at the bottom of in the crude oil accumulating course of processing, being deposited on jar, be the utilization ratio that improves crude oil and other storage tank, need regularly to remove this oily sludge partly of jar end.Because this part oily sludge is difficult to thoroughly handle with ordinary method, the way of handling relatively more commonly used is at present buried exactly or is burnt.By analysis, each component content is about in this part oily sludge: oil is 25-50%, mud 8-15%, water 20-60%, if the oil fuel in this part oily sludge is recycled, also is a considerable benefit.
Purpose of the present invention provides a kind of and reclaims the method for oil fuel with solvent extration from oily sludge, and the oily sludge mixture is separated, and reclaims oil fuel wherein, makes isolated mud, water allow compliance with emission standards, and the energy is reclaimed in decontamination.
The object of the present invention is achieved like this: the method that from oily sludge, reclaims oil fuel with solvent extration at raw material be oily sludge, comprise the oily sludge of oil field and Petrochemical Enterprises.Because the characteristic of mud energy adsorbed oil or water in the oily sludge, oily sludge is in exploitation, accumulating and refining process, emulsification is very serious, the key of wanting earlier oily and mud to be separated is except normal breakdown of emulsion, also need isolate the oil fuel in the oily sludge, remaining water just can utilize the proportion difference of mud and water that it is separated with mud, does not have the existence of oil in the mud after the separation, can directly arrange, reach the purpose of decontamination to the Nature.The method that selective solvent kingfisher of the present invention is got is dissolved oil fully and is separated from oily sludge, and isolated oil fuel is as energy recovery, and utilizes again.Therefore, the key of selecting a kind of suitable extraction solvent and processing condition to be present technique, extraction solvent must have following some physicochemical characteristic: 1, dissolving oil fuel wherein only, insoluble in water and mud; 2, boiling point low (atmospheric boiling point 45-90 ℃), condensation point higher (condensation point 20-30 ℃); 3, being convenient to liquid phase stores, manages and output; 4, nontoxic, nothing corrosion, environmentally safe; 5, the materialization product stable with purpose product oil fuel using under the operating procedure condition, chemical reaction does not take place; 6, low price is easy to get.
According to above-mentioned choice criteria, extraction solvent is lightweight coal tar (under the normal pressure boiling point 45-90 ℃), also can use sherwood oil, lightweight oil or C5.Utilize solvent that the oil fuel in the oily sludge is had extremely strong solvency action, water impurity, mud are not dissolved, oil fuel and other impurity are separated.
The processing condition of extraction: extraction temperature is 45-55 ℃, and greasy filth is 1 with the extraction solvent ratio: 3-5.The extraction mode adopts tower continuous extraction, also can adopt the intermittent type extraction, and extraction solvent can be recycled.
Technological process:
Intermittent type refers to that the fuel oil recovery is to carry out in the oily sludge in one or more vertical or horizontal extractor, determine the size of extractor according to the oily sludge amount of handling, be equipped with agitator on the extractor, oily sludge is squeezed in the extractor, with pump solvent is squeezed in the jar when temperature adds to 45-55 ℃ in jar, starting agitator stirs, extract mixing oil then out from extractor top, squeeze into the jar from the jar bottom again, continue to stir, allow solvent fully contact, stop after mixing stirring with oily sludge, make the in-tank mixing component static, delaminating deposition is emitted constituents of a mixture by the jar middle part, concentrates and carries out air distillation, steam the solvent cycle utilization, remaining then oil fuel for reclaiming.
Continous way is that oily sludge contacts in extraction tower with solvent is reverse, and extraction temperature 45-55 ℃ the time, the extraction mixture flows into atmospheric fractional tower from cat head, carries out the normal pressure fractionation in the tower.Outflow solvent recycle after cooling off of atmospheric fractional tower cat head, the oil fuel for reclaiming at the bottom of the tower is discharged mud continuously at the bottom of the extraction Tata.
When slow, can add the diluted acid of 1-3% to oily sludge layering in extraction tower, specifically can be that dilute sulphuric acid or dilute hydrochloric acid carry out deemulsification.
Two kinds of schemes are all moved in closed system.
The present invention has following characteristics: this method can effectively reclaim oil fuel from oily sludge, and the mud of telling, water can directly discharge the Nature, decontamination, and solvent cycle is used, and energy consumption is low; Simple, the easy row of Technology, and solvent consumption is low.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention;
Embodiment 1: adopt the intermittent type extraction
The oily sludge amount of finish is 10 cubic metres, volume is 25 cubic metres a horizontal extractor, oily sludge is squeezed into horizontal extractor, heat and dissolve, add 2% dilute sulphuric acid while stirring, after adding, dilute sulphuric acid does sedimentation slightly, by emitting water and the part mud that behind naphtenic acid, generates at the bottom of the jar, the lightweight coal tar (fraction is 45-90 ℃) that adds 10 cubic metres again in extractor temperature 45-55 ℃ the time continues to stir, after mixing as solvent, the sedimentation of termination of pumping static layering, sedimentation finishes, and delivers to storage tank recovery solvent to be heated but turn on pump mixes the thing that dissolves each other with upper strata in the jar, in order to recycling.Staying in the extractor bottom mixture adds fresh solvent again and carries out extracting second time, go round and begin again like this reach emission standard to impurity till, the mixing that upper strata in the jar the is told thing that dissolves each other is heated to 100 ℃ through process furnace, enter atmospheric fractional tower, solvent separated can obtain oil fuel with purpose product (blended fuel), mud of telling and water allow compliance with emission standards are directly discharged the Nature.
Embodiment 2: adopt the continous way extraction
Greasy filth enters from the extraction tower middle part, the extraction tower temperature is squeezed into lightweight coal tar (fraction is 45-90 ℃) for 45-55 ℃, mud is emitted from the extraction tower bottom, the extraction mixture that forms is warming up to 105 ℃ at cat head through process furnace and enters atmospheric fractional tower, the vapour phase part of atmospheric fractional tower cat head closes at solvent tank in order to recycle through the heat exchange condensation, liquid phase part under the atmospheric fractional tower is sent to fuel oil tank through the heat exchange cooling, and mud of telling and water allow compliance with emission standards are directly discharged the Nature.
Embodiment 3: adopt the continous way extraction
Greasy filth enters from the extraction tower middle part, and the extraction tower temperature is squeezed into C5 as solvent for 45-55 ℃.Mud is emitted from the extraction tower bottom, and the extraction mixture of formation is warming up to 80 ℃ at cat head through process furnace and enters atmospheric fractional tower, and other is with embodiment 2.
Embodiment 4: adopt the continous way extraction
Greasy filth enters from the extraction tower middle part, and the extraction tower temperature is squeezed into lightweight oil as solvent for 45-55 ℃.Mud is emitted from the extraction tower bottom, and the extraction mixture of formation is warming up to 105 ℃ at cat head through process furnace and enters atmospheric fractional tower, and other is with embodiment 2.
Embodiment 4: adopt the continous way extraction
Greasy filth enters from the extraction tower middle part, and the extraction tower temperature is squeezed into sherwood oil as solvent for 45-55 ℃.Mud is emitted from the extraction tower bottom, and the extraction mixture of formation is warming up to 80 ℃ at cat head through process furnace and enters atmospheric fractional tower, and other is with embodiment 2.
Claims (4)
1, a kind ofly from oily sludge, reclaim the method for oil fuel, it is characterized in that with solvent extration:
A, extracting process at raw material be oily sludge, comprise the oily sludge of oil field and Petrochemical Enterprises, use solvent method extraction temperature in extraction tower to be 45-55 ℃ of continuous extraction, fractionation under the normal pressure, extraction solvent can be recycled;
B, extraction solvent are lightweight coal tar (under the normal pressure boiling point 45-90 ℃), and greasy filth is 1 with the extraction solvent ratio: 3-5.
2, reclaim the method for oil fuel according to claim 1 is described with solvent extration from oily sludge, it is characterized in that: extraction solvent also can be sherwood oil, lightweight oil or C
5
3, the method that from oily sludge, reclaims oil fuel with solvent extration according to claim 1, it is characterized in that: to oily sludge layering in extraction tower when slow, the diluted acid that can add 1-3% specifically can be that dilute sulphuric acid or dilute hydrochloric acid carry out deemulsification.
4, according to claim 1ly from oily sludge, reclaim the method for oil fuel, it is characterized in that: also can adopt still formula intermittent type to extract with solvent extration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA03106566XA CN1526797A (en) | 2003-03-03 | 2003-03-03 | Solvent extraction process for recovering fuel oil from oil-bearing sludge |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA03106566XA CN1526797A (en) | 2003-03-03 | 2003-03-03 | Solvent extraction process for recovering fuel oil from oil-bearing sludge |
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| CN1526797A true CN1526797A (en) | 2004-09-08 |
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| CNA03106566XA Pending CN1526797A (en) | 2003-03-03 | 2003-03-03 | Solvent extraction process for recovering fuel oil from oil-bearing sludge |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818086A (en) * | 2010-04-23 | 2010-09-01 | 汪建林 | Production process and production equipment of sludge and garbage carbonized slurry fuel |
| CN101823824B (en) * | 2009-03-04 | 2011-09-07 | 中国石油天然气股份有限公司 | Treatment process of oily sludge |
| CN102381821A (en) * | 2011-09-22 | 2012-03-21 | 李廷安 | New technology for oil sludge processing |
| CN102453494A (en) * | 2010-10-15 | 2012-05-16 | 中国石油化工股份有限公司 | Method of ultrasound-enhanced supercritical extraction of oil sludge |
| CN103145306A (en) * | 2013-03-20 | 2013-06-12 | 北京昊诚油气科技有限公司 | Combined process and device for processing oily sludge through supercritical extraction method |
| CN104891756A (en) * | 2015-06-03 | 2015-09-09 | 温州大学 | Oil sludge recovery device and method based on sufficient stirring |
| CN108251153A (en) * | 2017-12-26 | 2018-07-06 | 中国石油天然气集团公司 | A kind of dehydrating aging process for purification and its system |
| CN111559841A (en) * | 2020-05-27 | 2020-08-21 | 新疆博云时代环保科技有限公司 | Oil sludge closed-loop treatment system and treatment method thereof |
| CN113772671A (en) * | 2021-10-27 | 2021-12-10 | 西安交通大学 | Improved coal-based activated carbon and preparation method and application thereof |
| US11492555B2 (en) | 2019-05-17 | 2022-11-08 | Southeast University | Processing method for perennially polluted sludge containing oils and water, waste residues or oil sands deep in natural oil mines, and processing system thereof |
-
2003
- 2003-03-03 CN CNA03106566XA patent/CN1526797A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823824B (en) * | 2009-03-04 | 2011-09-07 | 中国石油天然气股份有限公司 | Treatment process of oily sludge |
| CN101818086B (en) * | 2010-04-23 | 2012-11-07 | 汪建林 | Production process and production equipment of sludge and garbage carbonized slurry fuel |
| CN101818086A (en) * | 2010-04-23 | 2010-09-01 | 汪建林 | Production process and production equipment of sludge and garbage carbonized slurry fuel |
| CN102453494B (en) * | 2010-10-15 | 2014-05-21 | 中国石油化工股份有限公司 | Method of ultrasound-enhanced supercritical extraction of oil sludge |
| CN102453494A (en) * | 2010-10-15 | 2012-05-16 | 中国石油化工股份有限公司 | Method of ultrasound-enhanced supercritical extraction of oil sludge |
| CN102381821A (en) * | 2011-09-22 | 2012-03-21 | 李廷安 | New technology for oil sludge processing |
| CN103145306A (en) * | 2013-03-20 | 2013-06-12 | 北京昊诚油气科技有限公司 | Combined process and device for processing oily sludge through supercritical extraction method |
| CN103145306B (en) * | 2013-03-20 | 2018-07-17 | 北京昊诚油气科技有限公司 | A kind of group technology and device of supercritical extraction processing oily sludge |
| CN104891756A (en) * | 2015-06-03 | 2015-09-09 | 温州大学 | Oil sludge recovery device and method based on sufficient stirring |
| CN108251153A (en) * | 2017-12-26 | 2018-07-06 | 中国石油天然气集团公司 | A kind of dehydrating aging process for purification and its system |
| CN108251153B (en) * | 2017-12-26 | 2020-05-08 | 中国石油天然气集团公司 | Aging oil dehydration refining method and system |
| US11492555B2 (en) | 2019-05-17 | 2022-11-08 | Southeast University | Processing method for perennially polluted sludge containing oils and water, waste residues or oil sands deep in natural oil mines, and processing system thereof |
| CN111559841A (en) * | 2020-05-27 | 2020-08-21 | 新疆博云时代环保科技有限公司 | Oil sludge closed-loop treatment system and treatment method thereof |
| CN113772671A (en) * | 2021-10-27 | 2021-12-10 | 西安交通大学 | Improved coal-based activated carbon and preparation method and application thereof |
| CN113772671B (en) * | 2021-10-27 | 2024-03-29 | 西安交通大学 | Improved coal-based activated carbon and preparation method and application thereof |
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