CN102092907B - Method for resource treatment of oily sludge - Google Patents
Method for resource treatment of oily sludge Download PDFInfo
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- CN102092907B CN102092907B CN2009102421856A CN200910242185A CN102092907B CN 102092907 B CN102092907 B CN 102092907B CN 2009102421856 A CN2009102421856 A CN 2009102421856A CN 200910242185 A CN200910242185 A CN 200910242185A CN 102092907 B CN102092907 B CN 102092907B
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- 239000010802 sludge Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003921 oil Substances 0.000 claims abstract description 51
- 238000000605 extraction Methods 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000010779 crude oil Substances 0.000 claims abstract description 21
- 239000010865 sewage Substances 0.000 claims abstract description 13
- 238000011010 flushing procedure Methods 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 7
- 238000004064 recycling Methods 0.000 claims abstract description 5
- 238000009835 boiling Methods 0.000 claims abstract description 4
- 239000002904 solvent Substances 0.000 claims abstract description 4
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 238000012545 processing Methods 0.000 claims description 11
- 238000007667 floating Methods 0.000 claims description 10
- 238000009300 dissolved air flotation Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 abstract 2
- 238000005188 flotation Methods 0.000 abstract 2
- 239000011259 mixed solution Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 3
- 238000000638 solvent extraction Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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- Treatment Of Sludge (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention relates to a method for recycling oily sludge; flushing the oily sludge by using the sewage after the electro-flotation, and separating out crude oil by using the electro-flotation; feeding the washed oil-containing sludge to a flow curtain type extraction tower at the temperature of 10-80 ℃, wherein the volume ratio of an extraction solvent to the oil sludge is 1-15: 1; the extractant is a mixture of No. 6 solvent oil and aromatic hydrocarbon, the boiling point is 60-150 ℃, or oil field condensate oil or petroleum ether; putting the extraction mixed solution into a settling tank for natural settling to separate out an oil phase and a water phase; feeding the oil phase into a fractionating tower, and fractionating the extractant and the crude oil; the oil content of the extracted silt after washing reaches the standard of less than 3000mg/kg, and the washing water can be recycled after electric floatation treatment.
Description
Technical field
The present invention relates to the processing of the oily sludge in oil field, especially relate to crude oil and electric floating recovery oily sludge Central Plains oil treatment process in a kind of solvent extraction sump oil mud.
Background technology
The source of oily sludge mainly is that the oily sludge, the oil field gathering and transportation process that produce in the oil extraction process produce the sump oil mud of oily sludge and the generation of refinery's sewage disposal system.These oily sludges also contain the stratum silt that carries in the extraction liquid except that containing crude oil, the flco that forms in the sewage disposal process of disposing polluted water in oil station, corrosive pipeline product, heavy metal salt and paraffin, asphalitine etc. and certain moisture content.
The oily sludge that produces in the oil extraction process is mainly derived from Ground Processing System, and the oily sludge that produces in the oil extraction-generated waste water processing procedure is added flco that water purification agent that sewage purification adds in handling forms etc. and formed oily sludge.
The oil field gathering and transportation process produces oil tank that oily sludge is mainly derived from block station, multi-purpose station, settling tank, sewage jar, oil interceptor bed mud, oil product storage tank when storing oil product; A small amount of mechanical admixture in the oil product, the grains of sand, earth, heavy metal salt and heavy oil property components such as paraffin and asphalitine are deposited on tank bottom, form tank bottom oil sludge.The blowdown of settling tank, secondary settlement jar, well-flushing water recycling can also can produce oily sludge in addition.
Through analyze these oily sludges form different, usually oil content between 10%~60%, solids 10-60% such as silt, and water 15-60%.Under the situation that petroleum resources growing tension and environmental problem are on the rise, effectively reclaim the crude oil in the sump oil mud, not only practice thrift valuable crude resources, and eliminated environmental pollution.
Relatively the method for processing oily sludge commonly used has at present: solidify and bury, burn hot washing method, solvent extraction, chemical demulsification method, solid-liquid isolation method, pyrogenic process etc.But wherein many methods all exist some problems, are not suitable for very much for practical application.Like big, the easy generation secondary pollution of burning method power consumption, crude resources waste; Biological treatment need last length, and same crude resources also can not get recycling; Chemical demulsification method need add demulsifier and heating in addition to the serious oily sludge of emulsification, and post processing is difficult; Solid-liquid isolation method is low for the oil recovery rate that contains innage, with serious pollution oily sludge.
Solvent extraction is the effective ways that reclaim crude oil, and the body refuse after the extraction is prone to reach the national standard of landfill or stacking, thereby causes people's attention.On September 8th, 2004 disclosed patent CN1526797A; Use extraction and from oily sludge, reclaim fuel oil, this patent adopts general extraction tower, when the oily sludge layering is slow; The diluted acid that needs to add 1-3% carries out breakdown of emulsion, and this can cause corrosion on Equipment and second environmental pollution.
Summary of the invention
The purpose of this invention provides a kind of processing method of oily sludge, at first sloughs through electrochemical method and is rich in emulsified water in the oily sludge, makes sewage reach the re-injection requirement, and oily sludge is moisture after this method is handled reduces to below 1%; Second step was reclaimed a large amount of aging crude oil in the oily sludge, and the contained aging sump oil of oily sludge is reduced to below 1% after this method is handled; The 3rd step was the oily sludge processing that organises; After processing such as microbial fermentation, oily sludge is organised, reach innoxious discharging, last sump oil content is less than 3 ‰; Satisfy country's " agricultural pollutant emission " standard, the organic fertilizer that can be used as planting technique uses.
Technical scheme of the present invention is: treatment facility comprises electric floating device, stream curtain formula extraction tower, settling tank.
Concrete steps:
1) at first oil-containing dirt water is pumped into electric floating device, dissolved air flotation goes out the contained crude oil of part, the effluent cycle utilization after the air supporting, and the sewage flushing after the remaining sump oil mud electricity consumption air supporting, oil-polluted water electricity consumption dissolved air flotation again goes out crude oil;
2) will be promoted to stream curtain formula extraction tower through the sump oil mud after the sewage flushing, the crude oil in the sump oil mud dissolved fully with extractant; Extraction conditions: temperature 10-80 ℃, extractant and greasy filth volume ratio are 1-15: 1; The extraction mode adopts batch (-type);
2) will extract mixed liquor pumps into the settling tank natural subsidence and isolates oil phase and water;
3) oil phase is pumped into fractionating column, fractionate out extractant and crude oil;
4) the silt particle washing back oil-containing after the extraction reach national stacking standard (<3000mg/kg), embathe water and after electric floating processing, can be recycled.
Suitable extractant should satisfy following requirement:
1) high selectivity, only dissolving crude oil wherein;
2) can dissolve crude oil wherein fully;
3) boiling point low (<150 ℃), condensation point low (<-10 ℃);
4) be convenient to store and conveying;
5) viscosity, density, specific heat capacity, evaporation latent heat are low;
6) heat, nothing corrosion good, nontoxic with chemical stability;
7) low price is abundant with the source.
According to above-mentioned extractant alternative condition, the slective extraction agent is mixed solvent (mixture of 6# solvent naphtha and aromatic hydrocarbons, boiling point 60-150 a ℃), extractant also but field condensate or benzinum.Dissolubility and the selectivity of utilizing extractant is with oil and silt, separated form water.
Extraction conditions: temperature 10-80 ℃, extractant and greasy filth volume ratio are 1-15: 1.The extraction mode adopts batch (-type), and stream curtain formula extraction tower is adopted in extraction, and extractant recycles.
The most outstanding technical characterictic of the present invention is shale greasy filth, and mud is difficult to gravity settling separation and adopts stream curtain formula extraction tower, can adapt to the sump oil mud processing that different regions sump oil mud processing, particularly shale or natural sedimentation is difficult to be separated.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Treatment facility comprises electric floating device, stream curtain formula extraction tower and settling tank.
Embodiment 1
Oilfield sewage station accident pool contains sewage and sump oil mud.The detailed process that adopts the present invention to handle: at first oil-containing, dirt water are pumped into electric floating device, dissolved air flotation goes out contained crude oil, the effluent cycle utilization after the air supporting; Sewage flushing after the sump oil mud electricity consumption air supporting, oil-polluted water electricity consumption dissolved air flotation again goes out crude oil; Oily sludge 2m after the flushing
3Be promoted to stream curtain formula extraction tower and extract the about 2m of extractant
3Temperature is about 40-50 ℃ after the heat exchanger preheating of destilling tower top; Pump into stream curtain formula extraction tower and carry out spraying and extracting, the extraction mixed liquor pumps into the settling tank natural subsidence and isolates oil phase and water, and oil phase pumps into fractionating column; Fractionate out extractant and crude oil, extractant recycles; Water recycles behind the crude oil through electric floating isolating wherein.
Embodiment 2
Present embodiment improves extraction process among the embodiment 1, has increased reextraction, and other step is identical with the others of embodiment 1.
The greasy filth of single extraction is that 0.5: 1 ratio is carried out reextraction in extractant and sump oil mud again.
Embodiment 3
Present embodiment improves extraction process among the embodiment 2, has increased extracting the water wash step of back greasy filth, and other technology is identical with the others of embodiment 2.
Greasy filth behind the reextraction is used water wash, washing water directly pump into electric floating-electric flocculation plant handles, the oil phase that air supporting goes out mixes with the oil phase of single extraction and carries out the fractionation processing.
Claims (1)
1. the method for an oily sludge recycling treatment is characterized in that: treatment facility comprises electric floating device, a stream curtain formula extraction tower, settling tank;
Concrete steps:
1) at first oil-containing, dirt water are pumped into electric floating device, dissolved air flotation goes out the contained crude oil of part, the effluent cycle utilization after the air supporting, and the sewage flushing oily sludge after the electricity consumption air supporting, oil-polluted water electricity consumption dissolved air flotation again goes out crude oil;
2) will be promoted to stream curtain formula extraction tower through the oily sludge after the sewage flushing, the crude oil in the oily sludge dissolved fully with extractant;
Extraction conditions: temperature 10-80 ℃, extractant and greasy filth volume ratio are 1-15: 1; The extraction mode adopts batch (-type); Extractant is the mixture of 6# solvent naphtha and aromatic hydrocarbons, boiling point 60-150 ℃, or extractant is field condensate or benzinum;
2) will extract mixed liquor pumps into the settling tank natural subsidence and isolates oil phase and water;
3) oil phase is pumped into fractionating column, fractionate out extractant and crude oil;
4) washing of the silt particle after extraction back oil-containing reaches national stacking standard<3000mg/kg, embathes water and after electric floating processing, can be recycled.
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CN2009102421856A CN102092907B (en) | 2009-12-09 | 2009-12-09 | Method for resource treatment of oily sludge |
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CN2009102421856A CN102092907B (en) | 2009-12-09 | 2009-12-09 | Method for resource treatment of oily sludge |
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CN102092907A CN102092907A (en) | 2011-06-15 |
CN102092907B true CN102092907B (en) | 2012-03-07 |
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Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103241913B (en) * | 2012-02-07 | 2015-04-29 | 中国石油天然气股份有限公司 | Combined treatment method of oily sludge |
CN103420548B (en) * | 2012-05-15 | 2016-01-20 | 中国石油天然气股份有限公司 | Composite extraction solvent for oily sludge |
CN104609682B (en) * | 2013-11-04 | 2017-02-08 | 浙江海洋学院 | Tank body oil sludge treatment method |
CN105060664A (en) * | 2015-08-18 | 2015-11-18 | 辽宁石油化工大学 | Harmless treatment method of oil sludge through extraction assisted by dry distillation |
CN106552520A (en) * | 2015-09-28 | 2017-04-05 | 通用电气公司 | Using the apparatus and method of solvent extraction solute |
CN106810028B (en) * | 2015-12-02 | 2020-06-23 | 鞍钢股份有限公司 | Hot rolling oil sludge air floatation cleaning and deoiling system and deoiling method |
CN107572751A (en) * | 2016-07-05 | 2018-01-12 | 中国石油化工股份有限公司 | The method for handling greasy filth |
CN106966561A (en) * | 2017-04-19 | 2017-07-21 | 大连建华污泥处理有限公司 | Oil-bearing sludge treatment equipment and technique |
CN109437499B (en) * | 2018-12-21 | 2020-11-03 | 中国石油大学(北京) | Method and device for treating tank cleaning sump oil |
CN112079540B (en) * | 2019-06-14 | 2022-12-13 | 中国石油化工股份有限公司 | Method for treating oil sludge |
CN110791347A (en) * | 2019-10-25 | 2020-02-14 | 新疆大学 | Fatlute and living beings blend processing system |
CN111908761A (en) * | 2020-06-22 | 2020-11-10 | 张家港保税区慧鑫化工科技有限公司 | Oily sludge treatment system and treatment process |
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CN1488591A (en) * | 2002-10-10 | 2004-04-14 | 中国石油化工股份有限公司 | Oil-containing sludge treating method |
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WO2005021444A1 (en) * | 2003-08-29 | 2005-03-10 | Treatchem Ltd | Process obtaining landfill disposable waste from hydrocarbon containing sludge |
CN1765781A (en) * | 2004-10-29 | 2006-05-03 | 中国石油化工股份有限公司 | Oil-containing sludge disposal method |
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Patent Citations (4)
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CN1488591A (en) * | 2002-10-10 | 2004-04-14 | 中国石油化工股份有限公司 | Oil-containing sludge treating method |
JP2004255349A (en) * | 2003-02-28 | 2004-09-16 | Hymo Corp | Method for treating oil-containing waste water |
WO2005021444A1 (en) * | 2003-08-29 | 2005-03-10 | Treatchem Ltd | Process obtaining landfill disposable waste from hydrocarbon containing sludge |
CN1765781A (en) * | 2004-10-29 | 2006-05-03 | 中国石油化工股份有限公司 | Oil-containing sludge disposal method |
Non-Patent Citations (1)
Title |
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