CN103121780A - Oil sludge treatment method - Google Patents
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- CN103121780A CN103121780A CN2013100805256A CN201310080525A CN103121780A CN 103121780 A CN103121780 A CN 103121780A CN 2013100805256 A CN2013100805256 A CN 2013100805256A CN 201310080525 A CN201310080525 A CN 201310080525A CN 103121780 A CN103121780 A CN 103121780A
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Abstract
The invention discloses an oil sludge treatment method which comprises the following steps of: (a) adding oil sludge into a stirring tank, and adding water until the oil sludge is sufficiently emulsified and dispersed into an emulsion taking water as a dispersion phase; (b) adding sulfuric acid into the emulsion to adjust the pH value to acidity; (c) adding a ferrous sulfate saturated solution or powder into the acid emulsion so that the concentration of ferrous sulfate in the emulsion reaches 3.5-5g/L; (d) adding hydrogen peroxide into the uniformly stirred acid emulsion so that the concentration of hydrogen peroxide in the emulsion reaches 8-15ml/L, and sufficiently stirring for reaction; and (e) realizing three-phase separation of oil, water and sand by a physical process. The method disclosed by the invention can realize thorough recovery of crude oil during oil sludge treatment, the energy consumption in treatment is little, and the retreatment cost of the discharged water and solid phase is low.
Description
Technical field
The present invention relates to a kind of crude oil recovery and treatment process of the oily sludge that produces in defeated storage and transport process about Oil extraction and collection, particularly a kind of separation method of the mixture about crude oil, water, silt.
Background technology
Application number is that 200810151054.2 Chinese patent discloses " a kind of oil field oil sludge processing method ", and the method step is: first effect makes grit refinement in mud to oil sludge through pretreater, and removes foreign material; Enter pyrolysis oven, oil ingredient is vaporized out; Be transported to spray cooling device through pipeline, by water spraying cooling, liquefaction; Moisture and oil content enter oily-water seperating equipment and carry out oily water separation, obtain clean or white, cooling water circulation utilization; Non-condensable gas utilizes again as the fuel of pyrolysis oven; The burnt matter grit that pyrolysis produces is discharged through the pyrolysis oven sewage draining exit.The method can extract the light-end products that meet national standard in oil field oil sludge, the shortcoming main manifestations of the method is that the method for pyrolysis energy consumption is high, and the crude oil recovery rate is low, moisture effects oil gas condensation wherein makes equipment complicated, and treatment capacity is low, finally show as processing cost high, efficient is low.
Application number is the Chinese patent of CN201210284714.0, " a kind of Oil Containing Sludge Treatment and equipment " is disclosed, it comprises the following steps: step 1, add the water agitation and dilution: the oily sludge in oil tank is deposited in greasy filth through impeller pump and is stored in the pond, enter in the funnel of stirrer top through spiral pump, enter stirrer through funnel, stirrer carries out thin up to oily sludge; Step 2, ultrasonic dehydration: the oily sludge after agitation and dilution enters ultrasonic emulsion breaking equipment through the first inline pump, and ultrasonic emulsion breaking equipment carries out breakdown of emulsion to oily sludge to be processed; Step 3, solid-liquid separation: the oily sludge after breakdown of emulsion enters whizzer through the second inline pump, and whizzer carries out solid-liquid separation to oily sludge to be processed, and obtains that mud divides and oily(waste)water, and mud divides and enters mud sump, and oily(waste)water enters centrifugal reservoir and waits for oily water separation; Step 4, oily water separation: the oily(waste)water in centrifugal reservoir enters ultrafiltration system through the first high-pressure pump, ultrafiltration system carries out oily water separation to oily(waste)water to be processed, obtain oil content and moisture, and oil content is entered in concentration basin, moisture is entered in reservoir, a moisture part in reservoir enters in funnel through the second high-pressure pump, enters stirrer and for stirrer, oily sludge is diluted through funnel, and another part enters ultrafiltration system through backwashing pump and carries out cleaning operation.The shortcoming of the method is that equipment is complicated, and treatment capacity is low.Treatment effect to different oil sludges is unstable.
Application number is the Chinese patent of CN93117151.2, " method and apparatus of refiltered oil from oily sludge " disclosed, it comprises the following steps: oily sludge is added water mix, add again NaCL, reflux under stirring at low speed, with the oily sludge after refluxing after filtration or press filtration carry out liquid-solid separation, isolated solid formation is filter residue, isolated liquid phase thing divides fuel-displaced and water through gravity separation again, oily reuse or heavily refining, water) send wastewater treatment field back to and process again.The shortcoming of the method is to produce a large amount of brine wastes, and the solid phase Residual oil of separating is high, produces new environmental issue.
Application number is the Chinese patent of CN200410021519.4, discloses " a kind of method of separating treatment oily sludge ", and it is included in and adds entry, greasy filth and separating agent in container, after 70～95 ℃ of abundant stirrings, standing, form oil, water, mud three-phase, according to a conventional method they are separated; The weight ratio of greasy filth and water is 1: 2～1: 3, and the add-on of separating agent is 0.8%～1% of greasy filth weight, and described separating agent is comprised of sulphuric acid soln and emulsion splitter, percentage composition meter by weight, wherein sulfur acid 20～80%, emulsion splitter 0.5～1.5%, and all the other are water.The shortcoming of the method is that sulfuric acid consumption is large, produces acid-bearing wastewater.
Application number is the Chinese patent of CN200610012239.6, " a kind for the treatment of process of oily sludge " disclosed, it comprises following step: 1) oily sludge is pumped into the sludge reaction pond, add while stirring entry, the weight ratio that adds entry/mud is 0.5～5: 1; Then add treatment solution, the concentration that adds for the treatment of solution is 100～60000ppm; Described treatment solution comprises the silicate of the 0.001～10wt% that accounts for the treatment solution gross weight, the nonionogenic tenside of 1～10wt%, the anion surfactant of 1～10wt%, phosphoric acid salt and the 0.001～10wt% basic cpd of 0.001～10wt%, and surplus is water; 2) to step 1) the muddy water mixed system heat, make system heat up 10～90 ℃, in this temperature, stirred 10 minutes～6 hours, greasy filth fully mixes with the muddy water mixed system for the treatment of solution, the crude oil in mud by wash-out out; Described type of heating is the employing electric heater, or carries out water-bath by steam or hot water; 3) through step 2) processing after, stir on the limit, the limit adds coagulating agent in mixed solution, after reaction 2～30min, then add the polyacrylamide of 2～10ppm, then stir 2～5min, carries out solid-liquid separation; Described coagulating agent is aluminium system or ferric flocculant, and add-on is 20～300mg/l; Described solid-liquid separation is for to carry out in gravity settling basin or Cyclonic reactor; Hydraulic detention time at Cyclonic reactor is 2min; 4) through step 3) processing, solidliquid mixture is divided into 3 layers, the upper strata is wash-out sump oil out, the middle level is the sewage layer, the bottom is mud, enters the separation that solid-liquid separator carries out profit mud, collects respectively oil, water, mud; Described solid-liquid separator is settling tank, Cyclonic reactor, pressure filter or centrifugation apparatus; The sump oil that obtains enters contaminated-oil basin or collects storage tank, reclaims; The sewage that obtains enters step 1) the sludge reaction pond, be re-used again in the treatment process of next time oily sludge; The mud oil concentration that obtains advances the mud collecting tank less than 1wt%, treats solidification treatment or discharging.The shortcoming of the method is that the treatment agent cost is high, and the oil sludge of different sources is processed bad adaptability.
Application number is the Chinese patent of CN200610103671.6, " a kind of recycling processing method of oily sludge " disclosed, oil field refinery collection is defeated to be handled as follows at the useless carclazyte of the dehydration oily sludge below 80% or lube oil finishing with water ratio Sewage treatment systems with deriving from: (1) oily sludge pyrolysis processing: oily sludge is sent in airtight carbonization decomposition stove or horizontal rotation gas retort and carried out pyrolysis processing, pyrolysis processing was reacted 1-5 hour under 200-600 ℃ of condition, refiltered oil air water cut and pyrolysis residue; (2) will directly send to take clay mineral as main pyrolysis residue waste water or oil product decolouring system and make sorbing material, or deliver to the lube oil finishing system and make sorbent material; The pyrolysis residue of mud that (3) will contain inorganic aluminate or molysite flocculation medicament adds sulfuric acid or hydrochloric acid to carry out sour molten processing by stoichiometric 1 of aluminium salt or molysite: 1-5; (4) product that (3) is carried out sour molten processing is delivered to Sewage treatment systems do flocculation medicament, or sends to and make the concentrated medicament of mud; (5) the oil gas aqueous distillate of reclaiming is carried out after condensation process oil, gas, moisture from, oil gas is recycled, water is sent the sewage-farm back to and is processed.The shortcoming energy consumption of the method is high, and processing cost is high.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art, the crude oil that provides a kind of and process that energy consumption is very low, cost is low, reclaims can approach or reach a kind of oil sludge treatment process of former oil standard by desalting and dewatering.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of oil sludge treatment process, it comprises the following steps:
(a) add oil sludge in stirred pot, add water until the fully emulsified dispersion of oil sludge is become milk sap take water as disperse phase;
(b) add sulfuric acid to regulate its pH value to acid in described milk sap;
(c) interpolation ferrous sulfate saturated solution or powder make the concentration of ferrous sulfate in milk sap reach the 3.5-5 grams per liter in acidic emulsion;
(d) adding hydrogen peroxide in the acidic emulsion that stirs makes the concentration of hydrogen peroxide in milk sap reach 8-15 milliliter/liter also abundant stirring reaction;
(e) adopt physical method to realize the three phase separation of oil, water, sand;
(f) according to circumstances, the bed mud after three phase separation or oil slick are repeated described step (a) to step (e), to realize better separating effect.
The invention has the beneficial effects as follows: 1, do not use or seldom amount use solvent and tensio-active agent, do not use alkali and salt, make the cost of sewage disposal greatly reduce; 2, the waste water oil length that produces is low, suspension content is low, can recycle, and follow-up emission treatment is simple, and cost is low; The silt solid phase oil length of 3, discharging is low, repairs, cost of disposal is low.4, the crude oil that reclaims can approach or reach former oil standard by desalting and dewatering.5, present technique can be carried out at normal temperatures, processes energy consumption very low.
Utilize present method to process oil sludge and can realize that crude oil thoroughly reclaims, process energy consumption very low, the water of discharge and solid phase processing costs again are low.Realize the recycling of waste, economic benefit and environmental benefit are good.
Embodiment
Describe the present invention below in conjunction with specific examples.
A kind of oil sludge treatment process of the present invention, it comprises the following steps: (a) add oil sludge in stirred pot, add water until the fully emulsified dispersion of oil sludge is become milk sap take water as disperse phase; Preferably add tensio-active agent so that the fully emulsified dispersion of oil sludge becomes the milk sap take water as disperse phase in described oil sludge, tensio-active agent adopts general tensio-active agent to get final product, and add-on is advisable with the 0.5-1% that accounts for the oil sludge quality.(b) add sulfuric acid to regulate its pH value to acid in described milk sap; Preferred pH value is 3-5, and pH value can make the consumption of acid too much lower than 3, higher than 5 the carrying out that can be unfavorable for reaction system, affects treatment effect.(c) interpolation ferrous sulfate saturated solution or powder make the concentration of ferrous sulfate in milk sap reach the 3.5-5 grams per liter in acidic emulsion; Effect is the redox reaction of catalysis hydrogen peroxide; (d) adding hydrogen peroxide in the acidic emulsion that stirs makes the concentration of hydrogen peroxide in milk sap reach 8-15 milliliter/liter also abundant stirring reaction; Effect is to promote separating of crude oil and sand grain by redox reaction and foaming mechanism.(e) adopt physical method to realize the three phase separation of oil, water, sand; (f) according to circumstances, the bed mud after three phase separation or oil slick are repeated described step (a) to step (e), to realize better separating effect.
Embodiment 1
(w/w) oil sludge sample oil length 30% by quality ratio, water ratio 50%, silt or mechanical impurity 20%
(a) add above-mentioned oil sludge in stirred pot, adding quality is the water of 1 times of oil sludge quality, and the fully emulsified dispersion of oil sludge is become milk sap take water as disperse phase;
(b) adding sulfuric acid to regulate its pH value in described milk sap is 3;
(c) adding the ferrous sulfate saturated solution in acidic emulsion makes ferrous sulfate concentration reach 3.5 grams per liters and stir;
(d) adding hydrogen peroxide in the acidic emulsion that stirs makes hydrogen peroxide concentration reach 15 milliliters/liter and abundant stirring reaction;
(e) mixing liquid in stirred pot is pumped in skimming pond, make profit sand standing separation;
(f) skimming to accompanying in the deep fat tank, is deviate from the moisture in oil slick, obtains high quality crude oil; Silt and water enter sludge settling pond dehydration, can biological degradation after the silt dehydration, curing, landfill or roadbed ram soil.
After tested: the crude oil recovery rate reaches 92%, crude oil water content 1%, mechanical impurity 5%.
Embodiment 2
(w/w) oil sludge sample oil length 20% by quality ratio, water ratio 20%, silt or mechanical impurity 60%
(a) add above-mentioned oil sludge in stirred pot, adding quality is the water of 3 times of oil sludge quality, and to add quality be the tensio-active agent of oil sludge quality 1%, and the fully emulsified dispersion of oil sludge is become milk sap take water as disperse phase;
(b) adding sulfuric acid to regulate its pH value in described milk sap is 5;
(c) adding the ferrous sulfate powder in acidic emulsion makes ferrous sulfate concentration reach 5 grams per liters and stir;
(d) adding hydrogen peroxide in the acidic emulsion that stirs makes hydrogen peroxide concentration reach 10 milliliters/liter and abundant stirring reaction;
(e) mixing liquid in stirred pot is pumped in skimming pond, make profit sand standing separation;
(f) reclaim the top layer oil slick, after thermal dehydration, can use as oil fuel.
After tested: the crude oil recovery rate reaches 96%, crude oil water content 6%, mechanical impurity 9%.
Embodiment 3
(w/w) oil sludge sample oil length 20% by quality ratio, water ratio 20%, silt or mechanical impurity 60%
(a) add above-mentioned oil sludge in stirred pot, adding quality is the water of 3 times of oil sludge quality, and to add quality be the tensio-active agent of oil sludge quality 0.7%, and the fully emulsified dispersion of oil sludge is become milk sap take water as disperse phase;
(b) adding sulfuric acid to regulate its pH value in described milk sap is 5;
(c) adding the ferrous sulfate powder in acidic emulsion makes ferrous sulfate concentration reach 5 grams per liters and stir;
(d) adding hydrogen peroxide in the acidic emulsion that stirs makes hydrogen peroxide concentration reach 10 milliliters/liter and abundant stirring reaction;
(e) mixing liquid in stirred pot is pumped in skimming pond, make profit sand standing separation;
(f) reclaim the top layer oil slick, after thermal dehydration, can use as oil fuel.
After tested: the crude oil recovery rate reaches 96%, crude oil water content 6%, mechanical impurity 9%.
Embodiment 4
(w/w) oil sludge sample oil length 30% by quality ratio, water ratio 50%, silt or mechanical impurity 20%
(a) add above-mentioned oil sludge in stirred pot, adding quality is the water of 2 times of oil sludge quality, and the fully emulsified dispersion of oil sludge is become milk sap take water as disperse phase;
(b) adding sulfuric acid to regulate its pH value in described milk sap is 4;
(c) adding the ferrous sulfate saturated solution in acidic emulsion makes ferrous sulfate concentration reach 4 grams per liters and stir;
(d) adding hydrogen peroxide in the acidic emulsion that stirs makes hydrogen peroxide concentration reach 8 milliliters/liter and abundant stirring reaction;
(e) mixing liquid in stirred pot is pumped in skimming pond, make profit sand standing separation;
(f) skimming to accompanying in the deep fat tank, is deviate from the moisture in oil slick, obtains high quality crude oil; Silt and water enter sludge settling pond dehydration, can biological degradation after the silt dehydration, curing, landfill or roadbed ram soil.
After tested: the crude oil recovery rate reaches 95%, crude oil water content 0.6%, mechanical impurity 4%.
Embodiment 5
(w/w) oil sludge sample oil length 20% by quality ratio, water ratio 20%, silt or mechanical impurity 60%
(a) add above-mentioned oil sludge in stirred pot, adding quality is the water of 2 times of oil sludge quality, and to add quality be the tensio-active agent of oil sludge quality 0.5%, and the fully emulsified dispersion of oil sludge is become milk sap take water as disperse phase;
(b) adding sulfuric acid to regulate its pH value in described milk sap is 6;
(c) adding the ferrous sulfate powder in acidic emulsion makes ferrous sulfate concentration reach 4 grams per liters and stir;
(d) adding hydrogen peroxide in the acidic emulsion that stirs makes hydrogen peroxide concentration reach 12 milliliters/liter and abundant stirring reaction;
(e) mixing liquid in stirred pot is pumped in skimming pond, make profit sand standing separation;
(f) reclaim the top layer oil slick, after thermal dehydration, can use as oil fuel.
After tested: the crude oil recovery rate reaches 83%, crude oil water content 6%, mechanical impurity 9%.
Claims (2)
1. oil sludge treatment process is characterized in that it comprises the following steps:
(a) add oil sludge in stirred pot, add water until the fully emulsified dispersion of oil sludge is become milk sap take water as disperse phase;
(b) add sulfuric acid to regulate its pH value to acid in described milk sap;
(c) interpolation ferrous sulfate saturated solution or powder make the concentration of ferrous sulfate in milk sap reach the 3.5-5 grams per liter in acidic emulsion;
(d) adding hydrogen peroxide in the acidic emulsion that stirs makes the concentration of hydrogen peroxide in milk sap reach 8-15 milliliter/liter also abundant stirring reaction;
(e) adopt physical method to realize the three phase separation of oil, water, sand;
(f) according to circumstances, the bed mud after three phase separation or oil slick are repeated described step (a) to step (e), to realize better separating effect.
2. oil sludge treatment process according to claim 1, it is characterized in that: add tensio-active agent in the oil sludge in described step (a), add-on accounts for the 0.5-1% of oil sludge quality.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103880260A (en) * | 2014-02-13 | 2014-06-25 | 陕西延长石油（集团）有限责任公司永坪炼油厂 | Conditioning process for oil-refining sludge with high viscosity and high oil content |
| CN104817248A (en) * | 2015-04-23 | 2015-08-05 | 荣盛康洁(北京)生物环保科技有限公司 | 'cleaning-centrifuging' oil-sludge treatment process |
| CN104876404A (en) * | 2015-04-23 | 2015-09-02 | 荣盛康洁(北京)生物环保科技有限公司 | Method for cleaning oil-based sludge detritus |
| CN105621823A (en) * | 2014-10-30 | 2016-06-01 | 中国石油天然气股份有限公司 | Treatment process for oil-contained sludge generated by oilfield wastewater treatment |
| CN106430890A (en) * | 2016-10-26 | 2017-02-22 | 中国建筑材料科学研究总院 | Sludge dewatering method for reduction |
| CN106673401A (en) * | 2016-12-30 | 2017-05-17 | 北京普利科林环境科技有限公司 | Method for dewatering oily scum in petrochemical industry |
| CN107098552A (en) * | 2017-05-10 | 2017-08-29 | 中国石油大学(华东) | A kind of oily sludge takes off liquor treating process and processing unit |
| CN107188342A (en) * | 2017-07-25 | 2017-09-22 | 云南大地绿坤环保科技有限公司 | A kind of method of petrochemical industry greasy filth water mixed liquid quick separating |
| CN109592881A (en) * | 2019-01-11 | 2019-04-09 | 沧州市华油飞达固控设备有限公司 | A kind of greasy dirt method for separating and processing |
| CN110357372A (en) * | 2019-08-28 | 2019-10-22 | 江苏建筑职业技术学院 | A kind of underground coal mine wastewater treatment and renovation device and processing method |
| CN111547964A (en) * | 2020-04-30 | 2020-08-18 | 中海石油（中国）有限公司天津分公司 | Depolymerization treatment method of oil sludge containing hydrophobic association polymer |
| CN114573213A (en) * | 2022-05-07 | 2022-06-03 | 北京中科环通工程科技有限公司 | Treating agent and treating method for treating oily sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| CN103880260A (en) * | 2014-02-13 | 2014-06-25 | 陕西延长石油（集团）有限责任公司永坪炼油厂 | Conditioning process for oil-refining sludge with high viscosity and high oil content |
| CN105621823A (en) * | 2014-10-30 | 2016-06-01 | 中国石油天然气股份有限公司 | Treatment process for oil-contained sludge generated by oilfield wastewater treatment |
| CN104817248A (en) * | 2015-04-23 | 2015-08-05 | 荣盛康洁(北京)生物环保科技有限公司 | 'cleaning-centrifuging' oil-sludge treatment process |
| CN104876404A (en) * | 2015-04-23 | 2015-09-02 | 荣盛康洁(北京)生物环保科技有限公司 | Method for cleaning oil-based sludge detritus |
| CN106430890A (en) * | 2016-10-26 | 2017-02-22 | 中国建筑材料科学研究总院 | Sludge dewatering method for reduction |
| CN106673401A (en) * | 2016-12-30 | 2017-05-17 | 北京普利科林环境科技有限公司 | Method for dewatering oily scum in petrochemical industry |
| CN107098552A (en) * | 2017-05-10 | 2017-08-29 | 中国石油大学(华东) | A kind of oily sludge takes off liquor treating process and processing unit |
| CN107188342A (en) * | 2017-07-25 | 2017-09-22 | 云南大地绿坤环保科技有限公司 | A kind of method of petrochemical industry greasy filth water mixed liquid quick separating |
| CN109592881A (en) * | 2019-01-11 | 2019-04-09 | 沧州市华油飞达固控设备有限公司 | A kind of greasy dirt method for separating and processing |
| CN110357372A (en) * | 2019-08-28 | 2019-10-22 | 江苏建筑职业技术学院 | A kind of underground coal mine wastewater treatment and renovation device and processing method |
| CN111547964A (en) * | 2020-04-30 | 2020-08-18 | 中海石油（中国）有限公司天津分公司 | Depolymerization treatment method of oil sludge containing hydrophobic association polymer |
| CN114573213A (en) * | 2022-05-07 | 2022-06-03 | 北京中科环通工程科技有限公司 | Treating agent and treating method for treating oily sludge |
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Application publication date: 20130529 |