CN102583915A - Method for processing oily sludge in oil field - Google Patents
Method for processing oily sludge in oil field Download PDFInfo
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- CN102583915A CN102583915A CN2012100237840A CN201210023784A CN102583915A CN 102583915 A CN102583915 A CN 102583915A CN 2012100237840 A CN2012100237840 A CN 2012100237840A CN 201210023784 A CN201210023784 A CN 201210023784A CN 102583915 A CN102583915 A CN 102583915A
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Abstract
The invention discloses a method for processing oily sludge in an oil field, which comprises the following steps of: carrying out filter pressing and filtering after primarily filtering; under the heating state of 90-120DEG C, filtering by a filter screen of 18-35 meshes; carrying out secondary filtering by the filter screen of 70-120 meshes; adding emulsion breaker and heating to 45-60DEG C; standing until three phases of oil, water and solid are layered; separating upper-layer liquid to obtain crude oil; separating middle-layer liquid to obtain free water; after the crude oil and the free water are obtained, naturally drying the residual slag until the moisture content is less than 40%; and mixing at the volume ratio of slag to fire coal of (2-3):10 to obtain fuel. The method for processing oily sludge in an oil field has high crude oil recovery rate, more than 50% of crude oil in the oily sludge can be recovered, the processing cost of the oily sludge is indirectly lowered, and the economic value for processing the oily sludge is greatly improved.
Description
Technical field
The present invention relates to a kind of oil field and contain the treatment process of mud, will contain mud and carry out recycling treatment, make and contain mud and have certain recycling and be worth.
Background technology
In oilfield enterprise's production process, produce a large amount of oily sludges inevitably, store, land oily sludge that greasy filth, oil pipe breakage causes etc. in the tank bottom oil sludge at source mill station, clean-out service like crude oil.The complicated component of oily sludge; Wherein staple water accounts for the 90-98% of TV; If unprocessed direct discharging meeting havoc physical environment, oil-containing part crude oil in the oily sludge in addition is if can extract and recycle; Both can alleviate the pollution of greasy filth, also can make oily sludge utilization of resources maximization environment.Therefore, be necessary to design a greasy filth New Process for Treatment, really realize minimizing, innoxious, resource utilization target that greasy filth is disposed.
At present domesticly mainly comprise: (1) natural sedimentation (2) chemical extraction method (3) burning method (4) landfill method for oil-containing sludge treating process.Wherein, the natural sedimentation working efficiency is low, and is affected by environment big.And there is problem of environmental pollution in chemical extraction method, and chemical technology is prone to cause former oil quality to change.Adopt burning method to handle greasy filth, though realized the resource utilization of greasy filth to a certain extent, fail crude oil is extract from greasy filth, resource utilization is not high.Consider that from the environment protection angle natural sedimentation and chemical extraction method are not considered the greasy filth slag after the crude oil extraction is handled.Landfill method only be fit to handle oleaginousness little contain mud, but still maybe contaminated soil and underground water.
Summary of the invention
The purpose of this invention is to provide a kind of process for treating oil-containing sludge, realize the minimizing of oily sludge, innoxious and recycling treatment are improved the crude oil recovery rate simultaneously.
In order to realize above purpose, the technical scheme that the present invention adopted is: a kind of treatment process of oil field oil-containing mud:
1) oily sludge is tentatively filtered through the 300-500 mesh filter screen;
2) the oily sludge weight 1/1000～5/1000 after the preliminary filtration of step 1) added the flocculation agent stirring reaction 2～3 hours, stirred flocculation back filter-press dehydration;
3) with step 2) after oily sludge behind the filter-press dehydration is heated to 90-120 ℃, through 18-35 purpose strainer filtering, again through 70-120 purpose filter screen secondary filtration;
4) emulsion splitter of its weight 1/500～3/500 of adding in the oily sludge behind the step 3) secondary filtration is heated to 45-60 ℃, leaves standstill to treat the solid three-phase layering of profit, separates upper strata liquid and obtains crude oil, separates middle level liquid and obtains free-water;
5) obtain crude oil and free-water in the step 4) after, remaining residue natural drying to water cut is lower than 40%, according to residue and coal-fired volume ratio 2-3: 10 are mixed and made into fuel.
Said emulsion splitter is alkyl phenolic resin block polyether or phenol amine aldehyde resin block polyether.
Tentatively filtered natural subsidence 1-2 days before at oily sludge.
The said fuel that step 5) obtains returns step 2 through burning the heat that obtains) and step 4) heating usefulness.
The said time of repose of step 4) is 5-8 hour.
Step 2) said filter-press dehydration adopts spiral dewater to carry out processed.
The strainer of filtering 0.5mm solid particulate is set between said twice filtration of step 3).
The strainer of filtering 0.1mm solid particulate is set after the said secondary filtration of step 3).
Process for treating oil-containing sludge of the present invention; Adopt preliminary the filtration and the isolating technical scheme of flocculation filter-press dehydration; Water cut in the oily sludge is reduced to 60-71%; Under heated condition, carry out cascade filtration and breakdown of emulsion then and handle, make on the oily sludge in lower leaf be the solid three-phase of profit, obtain crude oil, free-water and residue after separating respectively.
Process for treating oil-containing sludge of the present invention; Dehydration rate height and dewatering process are simple, are easy to dispose on the spot enforcement, can significantly reduce the water cut of oily sludge behind the filter-press dehydration; Convenient to the transportation of the oily sludge after the dehydration, realized the minimizing that oily sludge is handled.Process for treating oil-containing sludge of the present invention; The crude oil that obtains after the processing, free-water and residue all have corresponding use, the recyclable utilization of crude oil, and free-water can recycle by reinjection into reservoir; Residue can mix the use that acts as a fuel with fire coal; Realized resource utilization that oily sludge is handled and innoxious, had good energy conservation and consumption reduction effects, significantly reduced the pollution of oily sludge environment.
Process for treating oil-containing sludge of the present invention, the recovery of crude oil is high, can reclaim the crude oil 50% or more in the oily sludge, indirect reduction the cost handled of oily sludge, improved the economic worth of oily sludge processing greatly.
In addition; As further improvement; Heating the heat that is adopted in the process for treating oil-containing sludge of the present invention can be provided by residue and coal-fired blended fuel combustion fully; And fuel combustion unnecessary heat can be used for life thermal source or generating are provided, and further improved the resource utilization that oily sludge is handled.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Fig. 1 is a process flow sheet of the present invention, and A is an oily sludge among the figure, and B is for handling the free-water that the back obtains, and 1 is preliminary filtering basin, and 2 is spiral dewater; 3 is the comb well heater, and 4 is filter screen, and 5 is the one-level filtering basin, and 6 is oil well pump, and 7 is strainer (0.5mm); 8 is overhead tank, and 9 is tank wagon, and 10 is the raw coal conveying belt, and 11 is mixer, and 12 is boiler; 13 for stacking the pond, and 14 is the cascade filtration pond, and 15 is strainer (0.1mm), and 16 is sewage valve, and 17 is oil well pump.
Below in conjunction with process flow sheet process for treating oil-containing sludge of the present invention is explained in detail:
Embodiment 1
1, greasy filth rough handling
Set up and stack the pond; 520 tons of the oily sludges that will collect from production unit, water cut is 93%, contains crude oil 1.2%; Put it into stacking pond 13 and carried out natural subsidence 1 day; Remove solid phase object bigger in the original oily sludge,, then can directly be for further processing if it is less not contain bigger solid phase object or content in the oily sludge of collecting;
2, the dehydration of oily sludge
The liquid phase oily sludge of stacking in the pond pumps in the filtering basin 1; Tentatively filter through 5 mesh filter screens, obtain 518 tons of oily sludges after preliminary the filtration, mix the flocculation agent SEPIGEL 305 according to 1/1000 of its quality; With 30 rev/mins speed stir process after 30 minutes; Utilize spiral dewater 2 to carry out processed, the oily sludge water ratio after the dehydration is 62%, 3 times of reductions in bulk.
3, one-level cascade filtration
Preliminary filtering oily sludge is filtered through one-level filtering basin 5 and cascade filtration pond 14 respectively; Be respectively arranged with filter screen 4 in two filtering basin; It is 18 orders that one-level is filtered the filter screen that adopts; The filter screen that cascade filtration adopts is 70 orders, and one-level filtering basin 5 are equipped with comb well heater 3 with cascade filtration pond 14, and oil well pump 6 and strainer 7 are set between one-level filtering basin 5 and the cascade filtration pond 14; Strainer 7 is used to remove by filter the above solid impurity (generally adopting 35 purpose filter screens) of 0.5mm, and oil well pump 6 is used to carry oily sludge; When one-level filtration and cascade filtration oily sludge is heated to 90 ℃, the viscosity that reduces oily sludge is beneficial to the carrying out of one-level filtration and cascade filtration to 0.13Pas;
4, crude oil recovery
With obtaining 350 tons of oily sludges behind the cascade filtration, it to be carried and be transferred in the overhead tank 8 through strainer 15 through oil well pump 17, its middle filtrator 15 is used to remove by filter the above solid impurity (generally adopting 120 mesh filter screens) of 0.1mm; Add emulsion splitter alkyl phenolic resin block polyether according to oily sludge weight 1/500; Utilize steam heating that oily sludge is heated to 45 ℃, leave standstill after 5 hours on the oily sludge under be divided into the solid three-phase of profit, extract the upper strata and obtain 3.3 tons of crude oil; The crude oil recovery rate is 53%; Crude oil is transported recycling through tank wagon 9, and then extracts the middle level and obtain 300 tons of free-waters, and free-water can recycle by reinjection into reservoir;
5, the moulded coal blending is burned
Remaining residue is 42 tons behind extraction crude oil and the free-water; Water cut is 51% in the residue, residue natural drying to water ratio is lower than 40% after, mix through stirrer 11 with the raw coal of raw coal conveying belt 10 input; The volume ratio of residue and raw coal is 2: 10; Mix the back and get into steam boiler and carry out burning disposal, burn heat and in steam boiler 12, produces the heating usefulness that steam is used for step 4, can feed also that the filtration step to step 3 heats in the comb well heater.
Embodiment 2
1, greasy filth rough handling
Set up and stack the pond; 658 tons of the oily sludges that will collect from production unit, water cut is 95%, contains crude oil 1.6%; Put it into stacking pond 13 and carried out natural subsidence 1.5 days; Remove solid phase object bigger in the original oily sludge,, then can directly be for further processing if it is less not contain bigger solid phase object or content in the oily sludge of collecting;
2, the dehydration of oily sludge
The liquid phase oily sludge of stacking in the pond pumps in the filtering basin 1; Tentatively filter through 5 mesh filter screens; Obtain 650 tons of oily sludges after preliminary the filtration, mix the flocculation agent SEPIGEL 305, with 30 rev/mins speed stir process after 30 minutes according to 3/1000 of its quality; Utilize spiral dewater 2 to carry out processed, the oily sludge water ratio after the dehydration is 55%.
3, one-level cascade filtration
Preliminary filtering oily sludge is filtered through one-level filtering basin 5 and cascade filtration pond 14 respectively; Be respectively arranged with filter screen 4 in two filtering basin, it is 25 orders that one-level is filtered the filter screen that adopts, and the filter screen that cascade filtration adopts is 90 orders; One-level filtering basin 5 are equipped with comb well heater 3 with cascade filtration pond 14; Oil well pump 6 and strainer 7 are set between one-level filtering basin 5 and the cascade filtration pond 14, and strainer 7 is used to remove by filter the above solid impurity of 0.5mm, and oil well pump 6 is used to carry oily sludge; When one-level filtration and cascade filtration oily sludge is heated to 100 ℃, the viscosity that reduces oily sludge is beneficial to the carrying out of one-level filtration and cascade filtration to 0.14Pas;
4, crude oil recovery
With obtaining 367 tons of oily sludges behind the cascade filtration, it to be carried and be transferred in the overhead tank 8 through strainer 15 through oil well pump 17, its middle filtrator 15 is used to remove by filter the above solid impurity of 0.1mm; Add emulsion splitter phenol amine aldehyde resin block polyether according to oily sludge weight 2/500; Utilize steam heating that oily sludge is heated to 55 ℃, leave standstill after 6 hours on the oily sludge under be divided into the solid three-phase of profit, extract the upper strata and obtain 5.7 tons of crude oil; The crude oil recovery rate is 54%; Crude oil is transported recycling through tank wagon 9, and then extracts the middle level and obtain 309 tons of free-waters, and free-water can recycle by reinjection into reservoir;
5, the moulded coal blending is burned
Remaining residue is 52 tons behind extraction crude oil and the free-water; Water cut is 49% in the residue, residue natural drying to water ratio is lower than 40% after, mix through stirrer 11 with the raw coal of raw coal conveying belt 10 input; The volume ratio of residue and raw coal is 2.5: 10; Mix the back and get into steam boiler and carry out burning disposal, burn heat and in steam boiler 12, produces the heating usefulness that steam is used for step 4, can feed also that the filtration step to step 3 heats in the comb well heater.
Embodiment 3
1, greasy filth rough handling
Set up and stack the pond; 956 tons of the oily sludges that will collect from production unit, water cut is 97%, contains crude oil 1.3%; Put it into stacking pond 13 and carried out natural subsidence 2 days; Remove solid phase object bigger in the original oily sludge,, then can directly be for further processing if it is less not contain bigger solid phase object or content in the oily sludge of collecting;
2, the dehydration of oily sludge
The liquid phase oily sludge of stacking in the pond pumps in the filtering basin 1; Tentatively filter through 5 mesh filter screens; Obtain 951 tons of oily sludges after preliminary the filtration, mix the flocculation agent SEPIGEL 305, with 30 rev/mins speed stir process after 30 minutes according to 1/1000 of its quality; Utilize spiral dewater 2 to carry out processed, the oily sludge water ratio after the dehydration is 50%.
3, one-level cascade filtration
Preliminary filtering oily sludge is filtered through one-level filtering basin 5 and cascade filtration pond 14 respectively; Be respectively arranged with filter screen 4 in two filtering basin, it is 35 orders that one-level is filtered the filter screen that adopts, and the filter screen that cascade filtration adopts is 120 orders; One-level filtering basin 5 are equipped with comb well heater 3 with cascade filtration pond 14; Oil well pump 6 and strainer 7 are set between one-level filtering basin 5 and the cascade filtration pond 14, and strainer 7 is used to remove by filter the above solid impurity of 0.5mm, and oil well pump 6 is used to carry oily sludge; When one-level filtration and cascade filtration oily sludge is heated to 120 ℃, the viscosity that reduces oily sludge is beneficial to the carrying out of one-level filtration and cascade filtration to 0.09Pas;
4, crude oil recovery
With obtaining 621 tons of oily sludges behind the cascade filtration, it to be carried and be transferred in the overhead tank 8 through strainer 15 through oil well pump 17, its middle filtrator 15 is used to remove by filter the above solid impurity of 0.1mm; Add emulsion splitter alkyl phenolic resin block polyether according to oily sludge weight 1/500; Utilize steam heating that oily sludge is heated to 60 ℃, leave standstill after 8 hours on the oily sludge under be divided into the solid three-phase of profit, extract the upper strata and obtain 7.5 tons of crude oil; The crude oil recovery rate is 60%; Crude oil is transported recycling through tank wagon 9, and then extracts the middle level and obtain 550 tons of free-waters, and free-water can recycle by reinjection into reservoir;
5, the moulded coal blending is burned
Remaining residue is 63 tons behind extraction crude oil and the free-water; Water cut is 53% in the residue; After residue natural drying to water ratio is lower than 40%, mix through stirrer 11 with the raw coal of raw coal conveying belt 10 inputs, the volume ratio of residue and raw coal is 2.5: 10; Mix the back becomes diameter 4cm through the molding coal machine roll pressed elliposoidal coal briquette; Join steam boiler then and carry out burning disposal, burn heat and in steam boiler, produces the heating usefulness that steam is used for step 4, can feed also that the filtration step to step 3 heats in the comb well heater.
Claims (8)
1. the treatment process of an oil field oil-containing mud is characterized in that:
1) oily sludge is tentatively filtered through 5 mesh filter screens;
2) the oily sludge weight 1/1000～5/1000 after the preliminary filtration of step 1) added the flocculation agent stirring reaction 2～3 hours, stirred flocculation back filter-press dehydration;
3) with step 2) after oily sludge behind the filter-press dehydration is heated to 90-120 ℃, through 18-35 purpose strainer filtering, again through the 70-120 purpose;
4) emulsion splitter of its weight 1/500～3/500 of adding in the oily sludge behind the step 3) secondary filtration is heated to 45-60 ℃, leaves standstill to treat the solid three-phase layering of profit, separates upper strata liquid and obtains crude oil, separates middle level liquid and obtains free-water;
5) obtain crude oil and free-water in the step 4) after, remaining residue natural drying to water cut is lower than 40%, according to residue and coal-fired volume ratio 2-3: 10 are mixed and made into fuel.
2. the treatment process of oil field oil-containing mud according to claim 1 is characterized in that: said flocculation agent is a SEPIGEL 305.
3. the treatment process of oil field oil-containing mud according to claim 1 is characterized in that: tentatively filtered natural subsidence 1-2 days before at oily sludge.
4. the treatment process of oil field oil-containing mud according to claim 1 is characterized in that: the said fuel that step 5) obtains returns step 2 through burning the heat that obtains) and step 4) heating usefulness.
5. the treatment process of oil field oil-containing mud according to claim 1 is characterized in that: the said time of repose of step 4) is 5-8 hour.
6. the treatment process of oil field oil-containing mud according to claim 1 is characterized in that: step 2) said filter-press dehydration adopts spiral dewater to carry out processed.
7. the treatment process of oil field oil-containing mud according to claim 1 is characterized in that: the strainer that the above solid particulate of filtering 0.5mm is set between said twice filtration of step 3).
8. the treatment process of oil field oil-containing mud according to claim 1 is characterized in that: the strainer that the above solid particulate of filtering 0.1mm is set after the said secondary filtration of step 3).
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| CN103127772A (en) * | 2013-03-05 | 2013-06-05 | 中国海洋石油总公司 | Device and method for eliminating sand of crude oil of laboratory |
| CN103739137A (en) * | 2014-01-06 | 2014-04-23 | 大庆市富杰化工有限公司 | Innocent treating and recovering method and device of sump oil in oil field |
| CN103803764A (en) * | 2012-11-07 | 2014-05-21 | 中国石油化工股份有限公司 | Oily sludge demulsifier and preparation method thereof |
| CN103833105A (en) * | 2014-02-24 | 2014-06-04 | 中国海洋石油总公司 | Method for treating oil-accumulated sludge and recycling crude oil |
| CN104341081A (en) * | 2013-07-30 | 2015-02-11 | 麦王环境技术股份有限公司 | Harmless treatment method for separation and recovery of oily sludge |
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| CN108821522A (en) * | 2018-06-05 | 2018-11-16 | 陕西中环信环保科技有限公司 | A kind of technique of waste oil mud extract oil |
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| CN111204954A (en) * | 2018-11-22 | 2020-05-29 | 中国石油化工股份有限公司 | Demulsifying agent for oil-containing sludge |
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| CN115583780A (en) * | 2022-10-13 | 2023-01-10 | 山东京阳科技股份有限公司 | Oily sludge treatment method |
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| CN103127772A (en) * | 2013-03-05 | 2013-06-05 | 中国海洋石油总公司 | Device and method for eliminating sand of crude oil of laboratory |
| CN104341081B (en) * | 2013-07-30 | 2016-08-17 | 麦王环境技术股份有限公司 | Greasy filth separates and the method for innocent treatment reclaimed |
| CN104341081A (en) * | 2013-07-30 | 2015-02-11 | 麦王环境技术股份有限公司 | Harmless treatment method for separation and recovery of oily sludge |
| CN104418474A (en) * | 2013-08-22 | 2015-03-18 | 中国石油化工股份有限公司 | High-efficiency low-temperature oil sludge de-emulsifier and preparation method thereof |
| CN104418474B (en) * | 2013-08-22 | 2016-03-30 | 中国石油化工股份有限公司 | A kind of high efficient cryogenic greasy filth emulsion splitter and preparation method thereof |
| CN103739137A (en) * | 2014-01-06 | 2014-04-23 | 大庆市富杰化工有限公司 | Innocent treating and recovering method and device of sump oil in oil field |
| CN103739137B (en) * | 2014-01-06 | 2015-09-16 | 大庆市富杰化工有限公司 | The harmless treatment recovery method of oilfield sump oil and device |
| CN103833105A (en) * | 2014-02-24 | 2014-06-04 | 中国海洋石油总公司 | Method for treating oil-accumulated sludge and recycling crude oil |
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| CN104789259A (en) * | 2015-05-09 | 2015-07-22 | 山东泰然新能源有限公司 | Filtering separation device for biomass pyrolytic heavy oil sludge and separation process thereof |
| CN105621831A (en) * | 2016-03-04 | 2016-06-01 | 海乐分离设备工程（无锡）有限公司 | Crude oil storage tank cleaning and oil sludge treatment system |
| CN105668961A (en) * | 2016-03-09 | 2016-06-15 | 北京天灏柯润环境科技有限公司 | Sludge treatment device and method |
| CN105668961B (en) * | 2016-03-09 | 2019-04-09 | 北京天灏柯润环境科技有限公司 | Sludge treatment equipment and method |
| CN106336107A (en) * | 2016-11-07 | 2017-01-18 | 安尼康（福建）环保设备有限公司 | Continuously operating vacuum material box and solid-liquid separation system |
| CN107324636A (en) * | 2017-05-27 | 2017-11-07 | 李成春 | A kind of ground sludge harmless treatment retracting device and its processing recovery method |
| CN108821522A (en) * | 2018-06-05 | 2018-11-16 | 陕西中环信环保科技有限公司 | A kind of technique of waste oil mud extract oil |
| CN111204954A (en) * | 2018-11-22 | 2020-05-29 | 中国石油化工股份有限公司 | Demulsifying agent for oil-containing sludge |
| CN109908821A (en) * | 2019-03-29 | 2019-06-21 | 辽宁泓新科技成果转化服务有限公司 | A kind of remote control apparatus of demulsifier |
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| CN115583780A (en) * | 2022-10-13 | 2023-01-10 | 山东京阳科技股份有限公司 | Oily sludge treatment method |
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