CN102092907A - Oil-containing sludge resource treatment method - Google Patents

Oil-containing sludge resource treatment method Download PDF

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Publication number
CN102092907A
CN102092907A CN2009102421856A CN200910242185A CN102092907A CN 102092907 A CN102092907 A CN 102092907A CN 2009102421856 A CN2009102421856 A CN 2009102421856A CN 200910242185 A CN200910242185 A CN 200910242185A CN 102092907 A CN102092907 A CN 102092907A
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China
Prior art keywords
oil
extraction
oily sludge
crude oil
water
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CN2009102421856A
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Chinese (zh)
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CN102092907B (en
Inventor
张学鲁
杜文军
杜庆华
刘国良
王爱军
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BEIJING GREENFIELD TECHNOLOGY DEVELOPMENT Co Ltd
Petrochina Co Ltd
China Petroleum and Natural Gas Co Ltd
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BEIJING GREENFIELD TECHNOLOGY DEVELOPMENT Co Ltd
China Petroleum and Natural Gas Co Ltd
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Priority to CN2009102421856A priority Critical patent/CN102092907B/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses

Abstract

The invention relates to an oil-containing sludge resource treatment method, which comprises the following steps of: flushing the oil-containing sludge by using sewage after electric air flotation, and separating out crude oil by using electric air flotation; delivering the flushed oil-containing sludge to a flow curtain type extraction tower, and performing extraction at the temperature of between 10 and 80 DEG C, wherein the volume ratio of an extraction solvent to the oily sludge is 1-15:1, the extraction solvent is a mixture of No.6 solvent oil and aromatic hydrocarbon, the boiling point of the extraction solvent is 60 to 150 DEG C, or the extraction solvent is oilfield gas condensate or petroleum ether; feeding the extraction mixed solution into a sedimentation tank, and performing natural sedimentation to separate an oil phase and an aqueous phase; delivering the oil phase to a fractionating tower to fractionate the extraction solvent and the crude oil; and washing the extracted muddy sand, wherein the oil content of the muddy sand is less than 3,000mg/kg of the standard, and the dipping water can be recycled after the electric air flotation.

Description

A kind of method of oily sludge recycling treatment
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 treatment systems.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 treatment process of disposing polluted water in oil station, corrosive pipeline product, heavy metal salt and paraffin, bituminous matter 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 treating processes 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, joint station, slurry tank, sewage jar, oil trap bed mud, oil product storage tank when storing oil product, a small amount of mechanical impurity in the oil product, the grains of sand, earth, heavy metal salt and heavy oil components such as paraffin and bituminous matter are deposited on tank bottom, form tank bottom oil sludge.The blowdown of slurry tank, secondary settlement jar, well-flushing water withdrawing can also can produce oily sludge in addition.
By analysis these oily sludges form different, usually oil length 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, the crude oil in the efficient recovery sump oil mud has not only been saved valuable crude resources, and has eliminated environmental pollution.
Relatively the method for processing oily sludge commonly used has at present: solidify and bury, burn hot washing method, solvent extration, 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.Power consumption greatly, easily produces secondary pollution as burning method, the crude resources waste; Biological treatment need last length, and same crude resources also can not get recycling; Chemical demulsification method need add emulsion splitter and heating in addition to the serious oily sludge of emulsification, and aftertreatment 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 more easily reaches the national standard of landfill or stacking, thereby causes people's attention.On September 8th, 2004 disclosed patent CN1526797A, use extraction process and reclaim oil fuel from oily sludge, 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 the corrosion and the second environmental pollution of equipment.
Summary of the invention
The purpose of this invention provides a kind of treatment process of oily sludge, at first sloughs by 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 present 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 present 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, slurry 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, oily(waste)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 be dissolved fully with extraction agent; Extraction conditions: temperature 10-80 ℃, extraction solvent and greasy filth volume ratio are 1-15: 1; The extraction mode adopts intermittent type;
2) will extract mixed solution pumps into the slurry tank natural subsidence and isolates oil phase and water;
3) oil phase is pumped into separation column, fractionate out extraction agent 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 extraction agent should satisfy following requirement:
1) high selectivity, only dissolving crude oil wherein;
2) can dissolve wherein crude oil fully;
3) boiling point low (<150 ℃), condensation point low (<-10 ℃);
4) be convenient to store and conveying;
5) viscosity, density, specific heat capacity, vaporization heat are low;
6) heat, nothing corrosion good, nontoxic with chemical stability;
7) low price and source are abundant.
According to above-mentioned extraction agent selection condition, the slective extraction agent is mixed solvent (mixture of 6# solvent oil and aromatic hydrocarbons, boiling point 60-150 a ℃), and extraction agent is field condensate or sherwood oil also.Utilize the solvability of extraction solvent and selectivity with oil and silt, water sepn.
Extraction conditions: temperature 10-80 ℃, extraction solvent and greasy filth volume ratio are 1-15: 1.The extraction mode adopts intermittent type, and stream curtain formula extraction tower is adopted in extraction, and extraction agent 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 flow sheet of the present invention.
Embodiment
Treatment facility comprises electric floating device, stream curtain formula extraction tower and slurry 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, oily(waste)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 extraction agent 3Temperature is about 40-50 ℃ after the interchanger preheating of distillation tower top, pump into stream curtain formula extraction tower and carry out spraying and extracting, the extraction mixed solution pumps into the slurry tank natural subsidence and isolates oil phase and water, and oil phase pumps into separation column, fractionate out extraction agent and crude oil, extraction agent 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 extraction agent 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 water wash behind the reextraction, 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, slurry 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, oily(waste)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 be dissolved fully with extraction agent;
Extraction conditions: temperature 10-80 ℃, extraction solvent and greasy filth volume ratio are 1-15: 1; The extraction mode adopts intermittent type; Extraction agent is the mixture of 6# solvent oil and aromatic hydrocarbons, boiling point 60-150 ℃, or extraction agent is field condensate or sherwood oil;
2) will extract mixed solution pumps into the slurry tank natural subsidence and isolates oil phase and water;
3) oil phase is pumped into separation column, fractionate out extraction agent and crude oil;
4) washing of the silt particle after extraction back oil-containing reaches national stacking standard<3000mg/kg, embathes water and can be recycled after electric floating processing.
CN2009102421856A 2009-12-09 2009-12-09 Oil-containing sludge resource treatment method Active CN102092907B (en)

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Application Number Priority Date Filing Date Title
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CN102092907B CN102092907B (en) 2012-03-07

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103241913A (en) * 2012-02-07 2013-08-14 中国石油天然气股份有限公司 Combined treatment method for oil-containing sludge
CN103420548A (en) * 2012-05-15 2013-12-04 中国石油天然气股份有限公司 Composite extraction solvent of oil-containing sludge
CN104609682A (en) * 2013-11-04 2015-05-13 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
CN106810028A (en) * 2015-12-02 2017-06-09 鞍钢股份有限公司 De-oiling system and method for deoiling are cleaned in a kind of hot rolling greasy filth air supporting
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
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
CN109437499A (en) * 2018-12-21 2019-03-08 中国石油大学(北京) A kind for the treatment of method and apparatus of clear tank sump oil
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
CN112079540A (en) * 2019-06-14 2020-12-15 中国石油化工股份有限公司 Method for treating oil sludge

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
CN1197794C (en) * 2002-10-10 2005-04-20 中国石油化工股份有限公司 Oil-containing sludge treating method
JP4072075B2 (en) * 2003-02-28 2008-04-02 ハイモ株式会社 Oil-containing wastewater treatment method
GB0320270D0 (en) * 2003-08-29 2003-10-01 Owen David M Method of processing hydrocarbon containing sludge to produce waste suitable for landfill disposal
CN100340503C (en) * 2004-10-29 2007-10-03 中国石油化工股份有限公司 Oil-containing sludge disposal method

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103241913A (en) * 2012-02-07 2013-08-14 中国石油天然气股份有限公司 Combined treatment method for oil-containing sludge
CN103241913B (en) * 2012-02-07 2015-04-29 中国石油天然气股份有限公司 Combined treatment method for oil-containing sludge
CN103420548A (en) * 2012-05-15 2013-12-04 中国石油天然气股份有限公司 Composite extraction solvent of oil-containing sludge
CN103420548B (en) * 2012-05-15 2016-01-20 中国石油天然气股份有限公司 A kind of compound extracting solvent of oily sludge
CN104609682A (en) * 2013-11-04 2015-05-13 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
CN106810028A (en) * 2015-12-02 2017-06-09 鞍钢股份有限公司 De-oiling system and method for deoiling are cleaned in a kind of hot rolling greasy filth air supporting
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
CN109437499A (en) * 2018-12-21 2019-03-08 中国石油大学(北京) A kind for the treatment of method and apparatus of clear tank sump oil
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
CN112079540A (en) * 2019-06-14 2020-12-15 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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