CN101734834A - Method for recovering sandy oil-containing sludge - Google Patents
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- CN101734834A CN101734834A CN200910113612A CN200910113612A CN101734834A CN 101734834 A CN101734834 A CN 101734834A CN 200910113612 A CN200910113612 A CN 200910113612A CN 200910113612 A CN200910113612 A CN 200910113612A CN 101734834 A CN101734834 A CN 101734834A
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- 239000002904 solvent Substances 0.000 claims abstract description 102
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- 238000004821 distillation Methods 0.000 claims abstract description 12
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- 239000010865 sewage Substances 0.000 claims abstract description 9
- 238000005406 washing Methods 0.000 claims abstract description 9
- 238000000605 extraction Methods 0.000 claims description 91
- 239000004576 sand Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 6
- 239000011780 sodium chloride Substances 0.000 claims description 6
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- 239000004744 fabric Substances 0.000 claims description 5
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- 238000004064 recycling Methods 0.000 claims description 4
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- 238000000926 separation method Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 140
- 239000010779 crude oil Substances 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 2
- 238000003912 environmental pollution Methods 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
- 239000003208 petroleum Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 231100000078 corrosive Toxicity 0.000 description 1
- 231100001010 corrosive Toxicity 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229920000591 gum Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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- 238000000638 solvent extraction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention belongs to the technical field of sludge treatment of oil fields and relates to a method for recovering sandy oil-containing sludge, which comprises the following steps: fully mixing extracting solvent with the sandy oil-containing sludge of the oil fields in a volume ratio of 0.5:1 at a temperature of between 10 and 80 DEG C to allow oil to dissolve in the extracting solvent to form a structure of three separated layers; then separating an extracting solvent layer, a water layer and a silt layer from one another; and performing distillation of the separated extracting solvent layer at an atmospheric pressure or reduced pressure to acquire oil and the extracting solvent respectively. The method can effectively extract and recover crude oil in the oil-containing sludge, and silt separated out reaches national stacking standards; the solvent can be recycled, and washing water can be sewage of the oil fields and can be recycled by electroflotation without causing secondary pollution, so that the oil and the water in the sandy oil-containing sludge of the oil fields can be recovered, and thus the original discarded resources are fully utilized, and the problem of discharging the sandy oil-containing sludge of the oil fields is solved effectively.
Description
Technical field
The present invention relates to the technical field that oil field sludge is handled, is a kind of method for recovering sandy oil-containing sludge.
Background technology
The source of sump oil mud mainly is the sandy oil-containing sludge that produces in the Oil extraction process, the sandy oil-containing sludge that contains sandy oil-containing sludge and the generation of refinery's Sewage treatment systems of oil field gathering and transportation process generation.These sump oil Fenders contain outside the crude oil, also contain the stratum silt that carries in the extraction liquid, the flco that forms in the sewage treatment process of disposing polluted water in oil station, corrosive pipeline product, heavy metal salt and paraffin, gum asphalt 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 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 petroleum 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, pyrolysis method 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, also produces secondary pollution simultaneously; Solid-liquid isolation method is low for the crude oil recovery rate that contains innage, with serious pollution oily sludge; Pyrolysis method facility investment height.
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,, but and the crude resources of efficient recovery preciousness, thereby draw its people's attention.Patent CN1526797A, the application extraction process reclaims oil fuel from oily sludge, and this patent adopts general extraction tower, when the oily sludge layering is slow, needs the diluted acid of adding 1% to 3% to carry out breakdown of emulsion, can cause the corrosion and the second environmental pollution of equipment.
Summary of the invention
The invention provides a kind of method for recovering sandy oil-containing sludge, it has overcome the deficiency of prior art, solved the emission problem of oil field sandy oil-containing sludge effectively, made the You Heshui in the sandy oil-containing sludge of oil field obtain reclaiming, made the silt particle oil-containing of separating reach national stacking standard.
Realizing of technical scheme of the present invention: a kind of method for recovering sandy oil-containing sludge by following measure, it is characterized in that being undertaken by following step: with the sandy oil-containing sludge in extraction solvent and oil field be by volume 0.5: 1 to 10: 1 be 10 ℃ to 80 ℃ following thorough mixing in temperature, oil dissolves in the extraction solvent and forms three layers of separate stage, then extraction solvent layer, water layer and dirty sand are separated from each other, the extraction solvent layer after will separating again obtains oil and extraction solvent respectively by the distillation of normal pressure or decompression; Wherein, extraction solvent adopts 6
#Solvent oil, 120
#The mixture of one or more in solvent oil, aromatic hydrocarbons, condensate oil, the sherwood oil.
Below technique scheme is done further to optimize or/and select:
With above-mentioned isolated dirty sand again water embathe.
Above-mentioned isolated dirty sand is embathed with oilfield sewage again.
After washing water after above-mentioned the embathing carry out three phase separation, the water recycling of telling.
Above-mentioned isolated water layer or embathe separation after washing water recirculation after electric floating processing use.
The per-cent of gross weight of pressing the sandy oil-containing sludge in extraction solvent and oil field in the sandy oil-containing sludge in above-mentioned extraction solvent and oil field adds 0.5% to 5% inorganic salt.
Before above-mentioned extraction, earlier fabric, bar, big block in the sandy oil-containing sludge in oil field are screened out.
Extraction plant in above-mentioned extracting operation process adopts dual horizontal axle extraction plant.
The present invention can effectively extract the crude oil that reclaims in the oily sludge, the silt particle oil-containing of separating reaches national stacking standard, solvent is recyclable, washing water can be oilfield sewage, electric floating processing back reusable edible does not cause secondary pollution, makes the You Heshui in the sandy oil-containing sludge of oil field obtain reclaiming, thereby made full use of original depleted resource, solved the emission problem of oil field sandy oil-containing sludge effectively.
Embodiment
The present invention is not subjected to the restriction of following embodiment, can determine concrete embodiment according to technical scheme of the present invention and practical situation.
Below in conjunction with embodiment the present invention is further described:
Embodiment 1, this method for recovering sandy oil-containing sludge is undertaken by following step: with the sandy oil-containing sludge in extraction solvent and oil field be by volume 0.5: 1 to 10: 1 be 10 ℃ to 80 ℃ following thorough mixing in temperature, oil dissolves in the extraction solvent and forms three layers of separate stage, then extraction solvent layer, water layer and dirty sand are separated from each other, the extraction solvent layer after will separating again obtains oil and extraction solvent respectively by the distillation of normal pressure or decompression; Wherein, extraction solvent adopts 6
#Solvent oil, 120
#One of in solvent oil, aromatic hydrocarbons, condensate oil, the sherwood oil or the mixture more than two kinds.
Embodiment 2, this method for recovering sandy oil-containing sludge is undertaken by following step: with the sandy oil-containing sludge in extraction solvent and oil field be by volume 0.5: 1 be 10 ℃ of following thorough mixing in temperature, oil dissolves in the extraction solvent and forms three layers of separate stage, then extraction solvent layer, water layer and dirty sand are separated from each other, the extraction solvent layer after will separating again obtains oil and extraction solvent respectively by the distillation of normal pressure or decompression; Wherein, extraction solvent adopts 6
#Solvent oil or 120
#Solvent oil.
Embodiment 3, this method for recovering sandy oil-containing sludge is undertaken by following step: with the sandy oil-containing sludge in extraction solvent and oil field be by volume 1: 1 be 50 ℃ of following thorough mixing in temperature, oil dissolves in the extraction solvent and forms three layers of separate stage, then extraction solvent layer, water layer and dirty sand are separated from each other, the extraction solvent layer after will separating again obtains oil and extraction solvent respectively by the distillation of normal pressure or decompression; Wherein, extraction solvent adopts 6
#Solvent oil or 120
#Solvent oil.
Embodiment 4, this method for recovering sandy oil-containing sludge is undertaken by following step: with the sandy oil-containing sludge in extraction solvent and oil field be by volume 2: 1 be 80 ℃ of following thorough mixing in temperature, oil dissolves in the extraction solvent and forms three layers of separate stage, then extraction solvent layer, water layer and dirty sand are separated from each other, the extraction solvent layer after will separating again obtains oil and extraction solvent respectively by the distillation of normal pressure or decompression; Wherein, extraction solvent adopts 6
#Solvent oil or 120
#Solvent oil.
Embodiment 5, this method for recovering sandy oil-containing sludge is undertaken by following step: with the sandy oil-containing sludge in extraction solvent and oil field be by volume 5: 1 be 10 ℃ of following thorough mixing in temperature, oil dissolves in the extraction solvent and forms three layers of separate stage, then extraction solvent layer, water layer and dirty sand are separated from each other, the extraction solvent layer after will separating again obtains oil and extraction solvent respectively by the distillation of normal pressure or decompression; Wherein, extraction solvent adopts 6
#Solvent oil or 120
#Solvent oil.
Embodiment 6, this method for recovering sandy oil-containing sludge is undertaken by following step: with the sandy oil-containing sludge in extraction solvent and oil field be by volume 8: 1 be 50 ℃ of following thorough mixing in temperature, oil dissolves in the extraction solvent and forms three layers of separate stage, then extraction solvent layer, water layer and dirty sand are separated from each other, the extraction solvent layer after will separating again obtains oil and extraction solvent respectively by the distillation of normal pressure or decompression; Wherein, extraction solvent adopts 6
#Solvent oil or 120
#Solvent oil.
Embodiment 7, this method for recovering sandy oil-containing sludge is undertaken by following step: with the sandy oil-containing sludge in extraction solvent and oil field be by volume 10: 1 be 80 ℃ of following thorough mixing in temperature, oil dissolves in the extraction solvent and forms three layers of separate stage, then extraction solvent layer, water layer and dirty sand are separated from each other, the extraction solvent layer after will separating again obtains oil and extraction solvent respectively by the distillation of normal pressure or decompression; Wherein, extraction solvent adopts 6
#Solvent oil or 120
#Solvent oil.
Embodiment 8, this method for recovering sandy oil-containing sludge is undertaken by following step: with the sandy oil-containing sludge in extraction solvent and oil field be by volume 0.5: 1 to 10: 1 be 10 ℃ to 80 ℃ following thorough mixing in temperature, oil dissolves in the extraction solvent and forms three layers of separate stage, then extraction solvent layer, water layer and dirty sand are separated from each other, the extraction solvent layer after will separating again obtains oil and extraction solvent respectively by the distillation of normal pressure or decompression; Wherein, extraction solvent adopts aromatic hydrocarbons or condensate oil or sherwood oil.
Embodiment 9, this method for recovering sandy oil-containing sludge is undertaken by following step: with the sandy oil-containing sludge in extraction solvent and oil field be by volume 0.5: 1 to 10: 1 be 10 ℃ to 80 ℃ following thorough mixing in temperature, oil dissolves in the extraction solvent and forms three layers of separate stage, then extraction solvent layer, water layer and dirty sand are separated from each other, the extraction solvent layer after will separating again obtains oil and extraction solvent respectively by the distillation of normal pressure or decompression; Wherein, extraction solvent adopts 6
#Solvent oil, 120
#The mixture of solvent oil, aromatic hydrocarbons, condensate oil, sherwood oil.
At the foregoing description 1 to 9, can further carry out following technical measures: can with isolated dirty sand again water embathe, institute's water preferably adopts oilfield sewage, the washing water after embathing are carried out three phase separation after, the water recycling of telling.Isolated water layer or embathe separation after washing water recirculation after electric floating processing use.
In the above-described embodiments: in extraction process, when the sandy oil-containing sludge in oil field was difficult for layering, the per-cent of gross weight of pressing the sandy oil-containing sludge in extraction solvent and oil field in the sandy oil-containing sludge in extraction solvent and oil field added 0.5% to 5% inorganic salt.When containing fabric, bar, big block in the sandy oil-containing sludge in the oil field, before extraction earlier with the sandy oil-containing sludge in oil field in fabric, bar, big block screen out.In the extracting operation process, extraction plant preferably adopts dual horizontal axle extraction plant.
Through detecting, through the silt particle oil-containing of separating behind the foregoing description reach national stacking standard (＜3000mg/kg).
Claims (10)
1. method for recovering sandy oil-containing sludge, it is characterized in that being undertaken by following step: with the sandy oil-containing sludge in extraction solvent and oil field be by volume 0.5: 1 to 10: 1 be 10 ℃ to 80 ℃ following thorough mixing in temperature, oil dissolves in the extraction solvent and forms three layers of separate stage, then extraction solvent layer, water layer and dirty sand are separated from each other, the extraction solvent layer after will separating again obtains oil and extraction solvent respectively by the distillation of normal pressure or decompression; Wherein, extraction solvent adopts 6
#Solvent oil, 120
#The mixture of one or more in solvent oil, aromatic hydrocarbons, condensate oil, the sherwood oil.
2. method for recovering sandy oil-containing sludge according to claim 1, it is characterized in that with isolated dirty sand again water embathe.
3. method for recovering sandy oil-containing sludge according to claim 2 is characterized in that isolated dirty sand is embathed with oilfield sewage again.
4. according to claim 2 or 3 described method for recovering sandy oil-containing sludge, after the washing water after it is characterized in that embathing carry out three phase separation, the water recycling of telling.
5. the recirculation after electric floating processing of method for recovering sandy oil-containing sludge according to claim 4, the washing water after it is characterized in that isolated water layer or embathing separation is used.
6. according to claim 1 or 2 or 3 described method for recovering sandy oil-containing sludge, it is characterized in that in the sandy oil-containing sludge in extraction solvent and oil field per-cent by the gross weight of the sandy oil-containing sludge in extraction solvent and oil field adds 0.5% to 5% inorganic salt.
7. method for recovering sandy oil-containing sludge according to claim 5 is characterized in that in the sandy oil-containing sludge in extraction solvent and oil field per-cent by the gross weight of the sandy oil-containing sludge in extraction solvent and oil field adds 0.5% to 5% inorganic salt.
8. according to claim 1 or 2 or 3 described method for recovering sandy oil-containing sludge, it is characterized in that before extraction earlier with the sandy oil-containing sludge in oil field in fabric, bar, big block screen out.
9. method for recovering sandy oil-containing sludge according to claim 7, it is characterized in that before extraction earlier with the sandy oil-containing sludge in oil field in fabric, bar, big block screen out.
10. method for recovering sandy oil-containing sludge according to claim 9 is characterized in that the extraction plant in the extracting operation process adopts dual horizontal axle extraction plant.
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| CN102408176A (en) * | 2010-09-25 | 2012-04-11 | 中国石油化工股份有限公司 | System and method for treating oil-containing sludge |
| CN103058471A (en) * | 2011-10-21 | 2013-04-24 | 中国石油化工股份有限公司 | Method for treatment of oil sludge by thermal treatment-supercritical extraction |
| CN103113912A (en) * | 2013-03-13 | 2013-05-22 | 天津市朗敦环保科技有限公司 | Method for separating and extracting crude oil from oil sand |
| 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 |
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| CN104609682A (en) * | 2013-11-04 | 2015-05-13 | 浙江海洋学院 | Tank body oil sludge treatment method |
| CN104891756A (en) * | 2015-06-03 | 2015-09-09 | 温州大学 | Oil sludge recovery device and method based on sufficient stirring |
| 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 |
| CN107129824A (en) * | 2017-05-23 | 2017-09-05 | 重庆理工大学 | A kind of method for reclaiming greasy filth petrochina |
| CN108704673A (en) * | 2018-05-31 | 2018-10-26 | 上海华畅环保设备发展有限公司 | Ebullated bed wood tar adds the de-oiling method and device of the outer waste discharge catalyst of hydrogen |
| CN108704672A (en) * | 2018-05-31 | 2018-10-26 | 上海华畅环保设备发展有限公司 | Ebullated bed wood tar adds the on-line regeneration method and apparatus of hydrogen decaying catalyst |
| CN110759614A (en) * | 2019-10-29 | 2020-02-07 | 中国石油化工股份有限公司 | Oil removing method for tank cleaning oil sludge before drying |
| CN110903008A (en) * | 2019-12-16 | 2020-03-24 | 湖北中油科昊机械制造有限公司 | Treatment method of oil-based mud |
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- 2009-12-29 CN CN200910113612A patent/CN101734834A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408176A (en) * | 2010-09-25 | 2012-04-11 | 中国石油化工股份有限公司 | System and method for treating oil-containing sludge |
| CN102408176B (en) * | 2010-09-25 | 2013-07-31 | 中国石油化工股份有限公司 | System and method for treating oil-containing sludge |
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