CN103693824A - Deep extraction coking treatment process of oil-containing sludge - Google Patents
Deep extraction coking treatment process of oil-containing sludge Download PDFInfo
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- CN103693824A CN103693824A CN201210366416.6A CN201210366416A CN103693824A CN 103693824 A CN103693824 A CN 103693824A CN 201210366416 A CN201210366416 A CN 201210366416A CN 103693824 A CN103693824 A CN 103693824A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention relates to a treatment process of oil-containing sludge, and is especially applicable to the oil-containing sludge produced in a wastewater treatment course of an oil refinery. The treatment process comprises the following steps: centrifugally dehydrated oil-containing sludge is subjected to a physical squeezing method to destroy a water, oil and solid stabilizing system of the oil-containing sludge, a material generated after squeezing is subjected to solvent extraction treatment, the extracted material is subjected to solid-liquid separation, the separated liquid phase is sent into a delayed coking device, a solid phase obtained after separation and drying can be used as agricultural sludge after mixing combustion with fuel coal, and wastewater generated in the procedure reaches standards after biochemical treatment and is discharged. The treatment process is mainly characterized in that the sludge treatment process has short procedures, low energy consumption, good extraction effect, mild operation conditions, good oil sludge treatment effect, and simple equipment operation and maintenance.
Description
Technical field
The present invention relates to the technique that oily sludge that a kind for the treatment of process of oily sludge, particularly refinery, oil refining sewerage treatment plant produce carries out coking processing after degree of depth extraction.
Background technology
Petrochemical Enterprises produces a large amount of oily sludges in refining of petroleum and wastewater treatment process, and they are mainly from oil trap, flotation cell, residual active sludge, dehydrating of crude oil tank, storage tank and slop oil tank etc.These sludge components are complicated, belong to more stable heterogeneous system, and mix fully, and viscosity is larger, and solid phase is difficult to thorough sedimentation, disposal of oily sludge difficulty.At present, in China's oil chemical industry, approximately produce every year on average 800000 tons of oily sludges.Along with the continuous expansion of enterprise's production equipment scale, corresponding waste sludge discharge total amount and kind, also increasing step by step, make pollutant discharge of enterprise total amount and pollution abatement costs also present the trend of rising.In recent years, along with improving constantly that national environmental protection statutory standard requires, law enforcement for environmental protection dynamics continues to increase, and pollution control and the recycling of the solid waste that generates in production process have become a difficult problem that perplexs oil and refining of petroleum industry.To solid waste, control has proposed stricter requirement to the < < prevention and control of environmental pollution by solid wastes method > > of new revision.If untreated oily sludge discharge expenses standard is 1000 yuan/ton.The processing of solid waste has been listed in and has built the important process content of saving property society with utilization.
Along with development and the attention to environment protection of national economy, increasing mechanism has carried out the research to disposal of oily sludge.But most technology because processing cost is high, technical process length, complicated operation, treatment effect is undesirable or other many-sided reasons, the treatment technology of oily sludge, is difficult to be widely applied formation suitability for industrialized production.At present, most air storage or the land-fill methods of adopting of oily sludge are processed, in these mud, generally contain the materials such as hydro carbons, benzene homologues, phenols and anthracene class, and follow stench and toxicity, if directly contact with physical environment, can cause larger pollution to soil, water body and vegetation, also mean the waste of petroleum resources simultaneously.
CN1488591A has proposed a kind for the treatment of process of oily sludge, and oily sludge is carried out to mechanical dehydration, then mixes with extraction agent and preheating, after mixing homogeneous, carry out extraction heat-processed, then carry out solid-liquid separation, liquid phase enters coker, and solid phase is as fuel.In this technology, oily sludge is a process mechanical dehydration before extraction, the degree of dehydration is low, admittedly oil-water in oily sludge after dehydration-remain stabilising system, extract not thorough, residue after extraction need to burn and just can reach innoxious requirement, and extracts the temperature high (100 ~ 150 ℃) needing, and treating processes energy consumption is larger.
US4666585 proposition is a kind of sends oily sludge into the technological line that coker is processed, and coking distillate and oily sludge are stirred, are mixed and made into slurry oil, enters coker.This process can be introduced more moisture and ash content, affects the normal running of coker, and can limit the treatment capacity of coker.It is fuel Jiao's production equipment that this technology is only applicable to product Jiao, and not being suitable for product Jiao is the production equipment of electrode coke.
US4994169 proposes oily sludge to carry out predrainage processing, then enters the treatment process of coking.By the net filtration first after filtration of the oily sludge from producing in petroleum refining process, then through stirring after will bulk mud pulverizing, mix with the distillate of coking, increase the mobility of material so that conveying.For the impact of less moisture on coker, adopt decompression (50 ~ 250mmHg) to remove moisture to the multistage evaporation system (4 grades) of normal pressure, at the bottom of dehydrated sludge is sent into coking tower top or tower, carry out coking processing.This technology enters coker by too much solid residue, will affect coke volatile matter and ash content index, affect the quality of refinery coke.Particularly, for the enterprise that produces high quality refinery coke, the use of this technology is restricted.
Summary of the invention
In order to overcome the applicable surface of prior art, the object of the present invention is to provide and a kind ofly can make full use of valuable components in oily sludge, and the composition reclaiming is convenient to be applicable to all kinds of cokers, and coking quality product is had no adverse effects, the process for treating oil-containing sludge that facility investment is few, technical process is short.
Through a large amount of tests, find, oily sludge is after mechanical dehydration, wherein still contain a large amount of moisture (generally in 80% left and right), most of moisture is with interstitial water, capillary water, planar water and exists in conjunction with various ways such as water, and these moisture form highly stable emulsified state with oil and solid, adopt extraction process to process, generally need higher temperature (100～150 ℃), and extraction is difficult for carrying out thoroughly, and the rate of loss of solvent in technique is higher; If first adopt mummification method to process to the oily sludge after mechanical dehydration, deviate from the water in mud, Gu destroy wherein oil-water-formed stabilising system, then adopt extraction treatment, extraction is more thorough like this, extract the temperature milder (10～70 ℃) needing, also reduced the loss and waste of solvent.But the raw material as oily sludge extraction solvent mainly contains Industrial products or the wide boiling range combination solvents such as lightweight coal tar, sherwood oil, petroleum naphtha, lightweight oil, benzene, toluene, butanone at present, although can reach certain effect of extracting, but the oil length of the solid slag after extraction is still higher, do not reach the standard of general solid waste, and extraction solvent turns over and in journey, has relatively large loss in process flow, General Loss amount can reach more than 6%, so just affect the economic performance of oily sludge abstraction technique, postponed applying of this technology.Simultaneously, if mud is through high temperature mummification, need more energy expenditure (if the water ratio of oily sludge is reduced to 40% by 80%, mud per ton need to evaporate 0.67 ton of water), and in drying process, generate a certain amount of tail gas and also need processing up to standard, and the method for physical squeezing mummification can make the water ratio of oily sludge drop to 15～25%, energy consumption is lower relatively.
Based on above-mentioned discovery, the present invention proposes a kind for the treatment of process of oily sludge, step is as follows:
(1) oily sludge after mechanical dehydration is sent into press apparatus, in temperature, it is 0～80 ℃, preferably 10～45 ℃, pressure is 20～30MPa, preferably under 23～28MPa, squeeze, the squeezing time is 20～50min, Gu can destroy oil-water in oily sludge-formed stabilising system by expressing process; The waste water producing in expressing process is sent into wastewater treatment equipment, after processing up to standard, discharges;
(2) mud cake generating after squeezing mixes and extracts 10～30min with extraction agent at 10～70 ℃, and the mass ratio of extraction agent and mud cake is (30～1): 1;
(3) after extraction finishes, solidliquid mixture is sent into solid-liquid separator, isolated liquid phase is sent into delayed coking unit as raw material; Isolated solid phase enters rotatory evaporator, in temperature, is 110～188 ℃, and pressure is 20～100kpa(absolute pressure) after evaporation 60～85min, obtain final solid slag down;
(4) by the solid residue obtaining and bunker coal 1:(20～300 in mass ratio) blending, preferably 1:(50～100), do fuel and use.
Suitable drying process condition and solvent selection are also the keys of contained Mud Treatment Technology.
In disposal of oily sludge process of the present invention, preferred operating restraint is as follows: 10～45 ℃ of oily sludge pressing temperatures, oily sludge material after squeezing water ratio before extraction is 15～20%, in materials abstraction process, extraction temperature is 25～75 ℃, and the mass ratio of the oily sludge material after extraction agent and squeezing is (15～2): 1.
Extraction solvent of the present invention is mixed solvent, by host A(85～100%(v/v)), secondary agent B(0～15%(v/v)) and auxiliary agent C(0～5%(v/v)) composition, wherein host is that boiling range is the distillate of 115～135 ℃, secondary agent B is that boiling range is the distillate of 140～150 ℃, and auxiliary agent C is that boiling range is the distillate of 80～100 ℃.
The higher squeeze pressure that the present invention adopts, and then the water ratio that reaches mud cake drops to 15～25%, the effect of extracting that is conducive to reach at a lower temperature.Gu the existence of large water gaging causes water-oil-stabilising system in oily sludge to be difficult to by extracting and separating oil phase at a lower temperature in mud cake.Under higher squeeze pressure, make the moisture content in mud cake drop to suitable scope, be conducive to the extraction under low temperature, be also conducive to follow-up coking step and reduce intensity.
Distillate of the present invention is petroleum naphtha, lightweight oil.
Waste oil in host composition of the present invention and character and oily sludge has larger similarity, and boiling range is that the distillate of 115～135 ℃ has good solvability to the waste oil of the waste oil of low boiling range in oily sludge and the high boiling range of part, the compatibility that the complicated oils compound in oily sludge has been had.
The present invention also coordinates the solvability of main solvent with the distillate that boiling range is 140～150 ℃ simultaneously as secondary agent, making has better compatibility to the waste oil of high boiling range.
The object that the present invention also realizes adjusting main solvent as auxiliary agent with the distillate that a small amount of boiling range is 80～100 ℃ simultaneously, the auxiliary agent C of a small amount of low boiling range can increase the liquid liquid exchange effect in extraction process.
Wherein, of the present invention, extractor will be sent into after sludge pressing, extractor top is provided with agitator, extraction agent enters in extractor, starts agitator and is uniformly mixed extraction, after mixing of materials is even, stops stirring, mixture is sent into centrifuge separator, and isolated liquid enters coker.To the extraction of coke button, can adopt autoclave intermittently also can adopt tower operate continuously.
Oily sludge of the present invention comprises the oily sludge that oil field and Petrochemical Enterprises produce.
Solid-liquid separation of the present invention adopts settlement separate or centrifugation.
The present invention is without extraction agent recvery facility, and extraction agent reclaims by lagging device, has simplified Oil Containing Sludge Treatment, saves the investment cost of sludge treatment equipment.
Solid phase in the present invention after extraction enters rotatory evaporator, and the final solid slag after evaporation is according to GB5085.3-2007 judging standard and GB5086.2-1997 and GB/T1555 poisonous substance discrimination method experiment Analysis.Analytical results shows that final solid residue can reach " general industrial solid waste storage, disposal site pollute control criterion " regulation (GB18599-2001), directly landfill disposal.
In the present invention, by making fuel after final solid slag and bunker coal blending, use, reduced the residual impact of micro-content organism, after burning, mixing residue can directly be used as agricultural mud.
The present invention adopts the treatment process of " press dewatering-extraction-coking ".Its advantage is: 1. by after oily sludge press dewatering, destroyed in oily sludge " Gu oil-water-" formed stabilising system, be more conducive to the carrying out of extraction, adopted the mixed solvent that is applicable to body series, extracting power is stronger.2. oily sludge, after press dewatering, greatly reduces volume and the quality of oily sludge, has alleviated the load of subsequent disposal; 3. by after oily sludge dehydration, greatly reduced in oily sludge because of the impact of moisture on coker, be applicable to all kinds of extraction plants; 4. pass through extracting and separating, because solid matter does not enter coker, adopting coker to process oily sludge can not increase the ash content of refinery coke; 5. having realized the degree of depth of oil content in oily sludge reclaims and utilizes.
Disposal of oily sludge flow process of the present invention is short, and technique is simple, and oily sludge mummification operation energy consumption is low; Extraction temperature is low, has reduced energy expenditure, and process cost and facility investment are low, and disposal of oily sludge effect is remarkable.The number of times of extraction is few, and effect of extracting is good, has reduced the investment of number of devices and plant construction, and after extraction, institute's residue that generates can be used as agricultural mud use after burning simultaneously, realizes innoxious, the recycling treatment of oily sludge.
Embodiment
Following examples are to illustrate of the present invention, and extraction agent used is all allocated according to body series.After extraction, final solid slag is according to GB5085.3-2007 judging standard." % (v/v) " described in embodiment and comparative example refers to that volumn concentration, " % " are quality percentage composition.
In oily sludge, the mensuration of water ratio is carried out according to method described in GB/T 212-2001.
In oily sludge, oil length is measured, and according to method described in GB/T 6504-2008, carries out.
Embodiment 1:
Extraction solvent formula is: extraction solvent host is selected the distillate of 110 ~ 135 ℃ of boiling ranges of boiling range naphtha stream, accounts for 95%; It is the distillate of 140～150 ℃ that boiling range is selected in secondary agent, accounts for 4%; Auxiliary agent boiling range is the distillate of 80～100 ℃, accounts for 1%, forms composite extractant.The oily sludge that certain oil refining sewerage treatment plant produces is after mechanical dehydration, and water ratio is 76.6wt%, and oil-contg is 17.6%, and solid content is 5.1%.Mud is sent into squeezing machine, pressing temperature is 25 ℃, pressure is 28MPa, after squeezing 30min, the water ratio that generates mud cake is 18.6%, oil-containing 59.6%, itself and compound extracting solvent are 30 ℃ by 1:10 hybrid extraction 30min(temperature), after extraction finishes, solidliquid mixture is sent into centrifuge separator, isolated liquid phase is sent into coker, extraction agent and the oil extracting reclaim through delayed coking unit, solid phase enters rotatory evaporator, in temperature, it is 160 ℃, pressure is 100kpa(absolute pressure) obtain final solid slag after lower evaporation 65min and after 1:100 blending, do fuel use in mass ratio with bunker coal.The solvent loss rate of this treatment process is 1.2%, and the residue oil-containing generating after extraction mummification is less than 0.3%, then the residue after burning with bunker coal blending can reach agricultural mud standard.
Comparative example 1:
Extraction solvent formula is: extraction solvent host is selected the distillate of 110 ~ 135 ℃ of boiling ranges of boiling range naphtha stream, accounts for 95%; It is the distillate of 140～150 ℃ that boiling range is selected in secondary agent, accounts for 4%; Auxiliary agent boiling range is the distillate of 80～100 ℃, accounts for 1%, forms composite extractant.The oily sludge that certain oil refining sewerage treatment plant produces is after centrifuge dripping, and water ratio is 76.6wt%, and oil-contg is 17.6%, and solid content is 5.1%.Without squeezing directly and compound extracting solvent by 1:10 hybrid extraction 30min(temperature, be 30 ℃), after extraction finishes, solidliquid mixture is sent into after centrifuge separator, isolated liquid phase is sent into coker, solid phase enters paddle formula sludge drier, in temperature, is 160 ℃, and pressure is 100kpa(absolute pressure) after evaporation 65min, obtain final solid slag down, this residual oil content is 23.2%, and generally solid waste is directly processed.
Embodiment 2:
Extraction solvent formula is: extraction solvent host is selected the distillate of 110 ~ 135 ℃ of boiling ranges of boiling range naphtha stream, accounts for 90%; It is the distillate of 140～150 ℃ that boiling range is selected in secondary agent, accounts for 8%; Auxiliary agent boiling range is the distillate of 80～100 ℃, accounts for 2%, forms composite extractant.The oily sludge that certain oil refining sewerage treatment plant produces is after mechanical dehydration, and water ratio is 79.5wt%, and oil-contg is 16.7%, and solid content is 4.7%.After squeezing, (pressing temperature is 25 ℃ to this mud, pressure is 26MPa, squeezing 20min, the water ratio that generates mud cake is 23.4%, oil-containing 52.6%, (temperature is 70 ℃ by 1:8 hybrid extraction for itself and compound extracting solvent, time 15min), after extraction finishes, solidliquid mixture is sent into centrifuge separator, and isolated liquid phase is sent into coker, and solid phase enters rotary kiln vaporizer, in temperature, be 160 ℃, pressure is 60kpa(absolute pressure) obtain final solid slag after lower evaporation 72min and after 1:100 blending, do fuel use in mass ratio with bunker coal.The solvent loss rate of this treatment process is 1.4%, and the residue slag oil-containing generating after extraction mummification is less than 0.3%, then the residue after burning with bunker coal blending can reach agricultural mud standard.
Comparative example 2:
The oily sludge that certain oil refining sewerage treatment plant produces is after mechanical dehydration, and water ratio is 77.5wt%, and oil-contg is 16.7%, and solid content is 4.7%.After squeezing, (pressing temperature is 25 ℃ to this mud, pressure is 20MPa, squeezing 10min) water ratio that generates mud cake is 35.6%, oil-containing 47.6%, itself and light naphtha in mass ratio 1:8 hybrid extraction (temperature is 70 ℃, time 15min), after extraction finishes, solidliquid mixture is sent into centrifuge separator, isolated liquid phase is sent into coker, solid phase enters rotary kiln vaporizer, in temperature, is 150 ℃, and pressure is 60kpa(absolute pressure) after mummification 72min, generate coke button down.The solvent loss rate of this treatment process is 3.2%, and the final residue slag oil-containing 2.3% generating, can not directly process as general solid waste.
Embodiment 3:
Extraction solvent formula is: extraction solvent host is selected the distillate of 110 ~ 135 ℃ of boiling ranges of boiling range naphtha stream, accounts for 92%; It is the distillate of 140～150 ℃ that boiling range is selected in secondary agent, accounts for 8%; Form composite extractant.The oily sludge that certain oil refining sewerage treatment plant produces is after mechanical dehydration, and water ratio is 79.5wt%, and oil-contg is 16.7%, and solid content is 4.7%.After squeezing, (pressing temperature is 25 ℃ to this mud, pressure is 29MPa, squeezing 40min) water ratio of generation mud cake is 16.2%, oil-containing 59.8%, (temperature is 25 ℃ by 1:20 hybrid extraction for itself and compound extracting solvent, time 30min), after extraction finishes, solidliquid mixture is sent into centrifuge separator, isolated liquid phase is sent into coker, solid phase enters rotary kiln vaporizer, in temperature, is 160 ℃, and pressure is 60kpa(absolute pressure) obtain final solid slag after lower evaporation 72min and after 1:100 blending, do fuel use in mass ratio with bunker coal.The solvent loss rate of this treatment process is 1.1%, and the residue slag oil-containing generating after extraction mummification is less than 0.3%, then the residue after burning with bunker coal blending can reach agricultural mud standard.
Comparative example 3:
The oily sludge that certain oil refining sewerage treatment plant produces is after mechanical dehydration, and water ratio is 79.5wt%, and oil-contg is 16.7%, and solid content is 4.7%.After squeezing, (pressing temperature is 25 ℃ to this mud, pressure is 29MPa, squeezing 40min) water ratio of generation mud cake is 16.2%, oil-containing 59.8%, itself and kerosene in mass ratio 1:20 hybrid extraction (temperature is 25 ℃, time 30min), after extraction finishes, solidliquid mixture is sent into centrifuge separator, isolated liquid phase is sent into coker, solid phase enters rotary kiln vaporizer, solid phase enters rotary steam vaporizer, in temperature, it is 185 ℃, pressure is 60kpa(absolute pressure) obtain final solid slag after lower evaporation 80min and after 1:200 blending, do fuel use in mass ratio with bunker coal, analytical results shows: the solvent loss rate of this treatment process is 1.2%, the final residue oleaginousness 0.5% generating, approach the general solid waste oleaginousness upper limit, in this waste residue and bunker coal blending combustion processes, black smoke is larger, be unfavorable for application.
Embodiment 4:
Extraction solvent formula is: extraction solvent is only selected host, and host is the distillate of 110 ~ 135 ℃ of boiling ranges of boiling range naphtha stream; Secondary agent and auxiliary agent content are 0.The oily sludge that certain oil refining sewerage treatment plant produces is after mechanical dehydration, and water ratio is 76.6wt%, and oil-contg is 17.6%, and solid content is 5.1%.Mud is sent into squeezing machine, pressing temperature is 25 ℃, pressure is 28MPa, after squeezing 30min, the water ratio that generates mud cake is 18.6%, oil-containing 59.6%, itself and compound extracting solvent are 30 ℃ by 1:15 hybrid extraction 30min(temperature), after extraction finishes, solidliquid mixture is sent into centrifuge separator, isolated liquid phase is sent into coker, extraction agent and the oil extracting reclaim through delayed coking unit, solid phase enters rotatory evaporator, in temperature, it is 160 ℃, pressure is 100kpa(absolute pressure) obtain final solid slag after lower evaporation 65min and after 1:100 blending, do fuel use in mass ratio with bunker coal.The solvent loss rate of this treatment process is 1.1%, and the residue oil-containing generating after extraction mummification is less than 0.3%, then the residue after burning with bunker coal blending can reach agricultural mud standard.
Comparative example 4:
Extraction solvent formula is identical with embodiment 4.The oily sludge that certain oil refining sewerage treatment plant produces is after centrifuge dripping, and water ratio is 76.6wt%, and oil-contg is 17.6%, and solid content is 5.1%.Without squeezing directly and compound extracting solvent by 1:15 hybrid extraction 30min(temperature, be 30 ℃), after extraction finishes, solidliquid mixture is sent into after centrifuge separator, isolated liquid phase is sent into coker, solid phase enters paddle formula sludge drier, in temperature, is 160 ℃, and pressure is 100kpa(absolute pressure) after evaporation 65min, obtain final solid slag down, this residual oil content is 20.1%, and generally solid waste is directly processed.
Claims (6)
1. a treatment process for oily sludge, is characterized in that step is as follows:
(1) oily sludge after mechanical dehydration is sent into press apparatus, in temperature, it is 0～80 ℃, pressure is to squeeze under 20～30MPa, the squeezing time is 20～50min, the water ratio of the mud cake generating is down to 15%～25%, the waste water producing in expressing process is sent into wastewater treatment equipment, after processing up to standard, discharges;
(2) mud cake generating after squeezing mixes and extracts 10～30min with extraction agent at 10～70 ℃, and the mass ratio of extraction agent and mud cake is (30～1): 1;
(3) after extraction finishes, solidliquid mixture is sent into solid-liquid separator, isolated liquid phase is sent into delayed coking unit as raw material; Isolated solid phase enters rotatory evaporator, in temperature, is 110～188 ℃, and pressure is to obtain final solid slag after evaporating 60～85min under 20～100KPa;
(4) solid residue obtaining and bunker coal blending are used as fuel;
Described extraction agent is mixed solvent, and the cumulative volume of extraction agent of take is 100%, and described extraction agent contains:
Host: boiling range is the distillate of 110～135 ℃, accounts for 85%～100% (v/v);
Secondary agent: boiling range is the distillate of 140～150 ℃, accounts for 0～15% (v/v);
Auxiliary agent: boiling range is the distillate of 80～100 ℃, accounts for 0～5% (v/v).
2. treatment process as claimed in claim 1, is characterized in that described distillate is petroleum naphtha or lightweight oil.
3. treatment process as claimed in claim 1, is characterized in that in step (1), oily sludge pressing temperature is 10～45 ℃.
4. treatment process as claimed in claim 1, is characterized in that in step (1), squeeze pressure is 23～28MPa.
5. treatment process as claimed in claim 1, is characterized in that in described oily sludge extraction process, extraction temperature is 25～75 ℃.
6. treatment process as claimed in claim 1, is characterized in that described extraction agent and the mass ratio of the rear oily sludge material of squeezing are (15～2): 1.
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Cited By (5)
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| 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 |
| CN105565621A (en) * | 2016-01-27 | 2016-05-11 | 中国海洋石油总公司 | Oil washing method for viscous-elastic oily sludge |
| CN106830605A (en) * | 2016-09-20 | 2017-06-13 | 上海优华系统集成技术股份有限公司 | A kind of sludge combination treatment method and device |
| CN109293190A (en) * | 2018-11-02 | 2019-02-01 | 南华大学 | A kind of processing method of oily sludge |
| CN114656118A (en) * | 2022-03-03 | 2022-06-24 | 岳龙飞 | Process method for regenerating clean and clean resources of oily sludge |
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| CN102050556A (en) * | 2009-10-30 | 2011-05-11 | 中国石油天然气股份有限公司 | Treatment method of oily sludge |
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