CN110563295A - Method for efficiently treating tank bottom oil sludge - Google Patents
Method for efficiently treating tank bottom oil sludge Download PDFInfo
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- CN110563295A CN110563295A CN201910921529.XA CN201910921529A CN110563295A CN 110563295 A CN110563295 A CN 110563295A CN 201910921529 A CN201910921529 A CN 201910921529A CN 110563295 A CN110563295 A CN 110563295A
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- sludge
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/04—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by extraction
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/04—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by extraction
- C10G1/045—Separation of insoluble materials
Abstract
the invention discloses a method for efficiently treating tank bottom oil sludge, which comprises the steps of soaking oil-containing sludge by adopting an organic solvent, washing by using a medicament, and separating oil, water and sludge to finish the treatment of the tank bottom oil sludge. The treatment method can greatly reduce the usage amount of the organic solvent in the common oil sludge extraction process, has the treatment effect far superior to that of a single hot washing process, and has the advantages of simple operation, wide application range and high oil removal rate.
Description
Technical Field
the invention relates to a method for efficiently treating tank bottom oil sludge, and belongs to the technical field of oil-containing sludge treatment.
background
with the rapid development of global economy, the demand for petroleum is increasing, and the number of oil wells and refineries is also rapidly increasing. During the processes of crude oil extraction, storage, transportation, processing and crude oil extraction liquid treatment, a large amount of oil products, soil and other impurities form oily sludge due to accidents, oil leakage, natural sedimentation and the like. The sludge is large in volume and contains a large amount of benzene series, phenols, anthracene, pyrene and other malodorous toxic substances, and if the sludge is not treated and directly discharged, the sludge not only causes serious pollution to the ecological environment, but also poses serious threats to the health of human beings, animals and plants. Moreover, the components of the oil sludge are very complex, different with different geological conditions and production processes, complex and difficult to treat. The tank bottom oil sludge treatment difficulty is higher, the oil sludge generally contains about 25 percent of water and 5 percent of inorganic matters, and the rest 70 percent of the water and the inorganic matters are hydrocarbons, so the recycling value is higher.
at present, methods for treating tank bottom oil sludge at home and abroad comprise a solvent extraction method, a heat treatment method, a microbial degradation method, a chemical washing method, a landfill method and the like. The solvent extraction method has high cost and certain potential safety hazard; the heat treatment method not only consumes a large amount of energy, but also causes air pollution; although the microbial degradation method cannot cause pollution, the treatment period is long, the pertinence is strong, and industrialization cannot be realized at present; the landfill method is most direct and simple, but causes soil pollution and influences ecological development. The chemical washing method is a green method for treating sludge by heating and stirring using a surfactant and an auxiliary agent as a washing liquid, but the treatment effect is general. There are other treatment methods, such as ultrasound, supercritical water, etc., which are currently in research stage, and have high cost, high equipment requirement, and are not applicable to industrialization. The application publication No. CN104609682A "a tank bottom oil sludge treatment method" discloses a treatment method which has good treatment effect, but the use amount of a pretreatment extracting agent is large, and secondary washing is needed. In patent of CN107857449A, a method for removing crude oil from oil sludge at tank bottom, the method for removing crude oil from oil sludge at tank bottom is characterized in that alkali liquor is used for stirring at a certain temperature after the oil sludge at tank bottom is heated and pretreated, and the treatment efficiency is lower than 60%.
therefore, a method which is environment-friendly and economical and can treat tank bottom oil sludge efficiently is urgently needed.
disclosure of Invention
the invention aims to provide an efficient oil sludge treatment method, which adopts an organic solvent to soak oil-containing sludge, washes with a chemical agent, and separates oil, water and sludge into three phases, namely, completes the treatment of tank bottom oil sludge. The treatment method can greatly reduce the usage amount of the organic solvent in the common oil sludge extraction process, has the treatment effect far superior to that of a single hot washing process, and has the advantages of simple operation, wide application range and high oil removal rate.
the method for efficiently treating the tank bottom oil sludge comprises the following steps:
Soaking:
a. adding an organic solvent with the mass 0.2-1 time of that of the oily sludge, and soaking for 5-30min under a shaking condition, wherein the organic solvent is n-hexane, n-heptane, n-pentane, cyclohexane, high-boiling-point petroleum ether, kerosene or gasoline;
washing the medicament:
b. b, adding a washing agent aqueous solution with the mass being 3-5 times that of the oily sludge soaked in the step a, and washing at the temperature of 50-80 ℃ and the rotating speed of 150-300rpm for 30-90min, wherein the agent is prepared from an active assistant and a surfactant according to the mass ratio of 1:2-4, and the active assistant is sodium silicate, sodium bicarbonate or sodium carbonate; the surfactant is formed by compounding any one of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate and alkyl diphenyl ether disulfonate with any one of span 80, TX-100 or dodecyl betaine in a mass ratio of 1:0.5-2, the total concentration of the medicament is 1-20g/L,
centrifugal separation:
c. And c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: separating for 5-15min in a centrifuge at the rotating speed of 1800-3500rpm, and finishing the treatment of the oil sludge at the bottom of the tank.
compared with the prior art, the method for efficiently treating the tank bottom oil sludge has the following innovations:
according to the invention, a small amount of organic solvent is used for preliminarily wetting the oil sludge, the binding force between the heavy oil component and the sand is reduced, and then the oil sludge is washed by adopting a hot washing method, so that the oil removing effect is greatly improved, and the treatment cost and the loss of the organic solvent are effectively reduced.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but is not limited to the following examples.
Example 1
soaking:
a. Weighing 25g of oily sludge, adding 25ml of cyclohexane, and intermittently shaking and soaking for 10min under a shaking condition;
Washing the medicament:
b. B, adding 75ml of a reagent solution which is prepared by compounding sodium dodecyl benzene sulfonate, dodecyl betaine and sodium silicate in a mass ratio of 2:1:2 and has a total concentration of 5g/L into the oily sludge soaked in the step a, and washing at 70 ℃ and a rotation speed of 200rpm for 60 min;
centrifugal separation:
c. and c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: and (3) separating for 15min in a centrifuge at the rotating speed of 3000rpm to finish the treatment of oil sludge at the bottom of the tank, wherein the oil removal rate is 85.28% by calculation.
example 2
Soaking:
a. weighing 25g of oily sludge, adding 10ml of cyclohexane, and intermittently shaking and soaking for 10min under a shaking condition;
washing the medicament:
b. b, adding 90ml of a reagent solution which is prepared by compounding sodium dodecyl benzene sulfonate, dodecyl betaine and sodium silicate in a mass ratio of 2:1:2 and has a total concentration of 5g/L into the oily sludge soaked in the step a, and washing at 70 ℃ and a rotation speed of 200rpm for 60 min;
centrifugal separation:
c. And c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: and (3) separating for 15min in a centrifuge at the rotating speed of 3000rpm to finish the treatment of oil sludge at the bottom of the tank, wherein the oil removal rate is 75.28% by calculation.
example 3
Soaking:
a. Weighing 25g of oily sludge, adding 5ml of cyclohexane, and intermittently shaking and soaking for 5min under a shaking condition;
washing the medicament:
b. b, adding 95ml of a reagent solution which is prepared by compounding sodium dodecyl benzene sulfonate, dodecyl betaine and sodium silicate in a mass ratio of 2:1:2 and has a total concentration of 5g/L into the oily sludge soaked in the step a, and washing at 70 ℃ and a rotation speed of 200rpm for 60 min;
Centrifugal separation:
c. and c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: and (3) separating for 15min in a centrifuge at the rotating speed of 3000rpm to finish the treatment of oil sludge at the bottom of the tank, wherein the oil removal rate is 69.28% by calculation.
Example 4
soaking:
a. weighing 25g of oily sludge, adding 10ml of cyclohexane, and intermittently shaking and soaking for 30min under a shaking condition;
Washing the medicament:
b. b, adding 90ml of a reagent solution which is prepared by compounding sodium dodecyl benzene sulfonate, dodecyl betaine and sodium silicate in a mass ratio of 2:1:2 and has a total concentration of 5g/L into the oily sludge soaked in the step a, and washing at 80 ℃ and a rotation speed of 200rpm for 60 min;
Centrifugal separation:
c. and c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: and (3) separating for 15min in a centrifuge at the rotating speed of 3000rpm to finish the treatment of oil sludge at the bottom of the tank, wherein the oil removal rate is 80.46 percent by calculation.
Example 5
soaking:
a. weighing 25g of oily sludge, adding 5ml of cyclohexane, and intermittently shaking and soaking for 10min under a shaking condition;
Washing the medicament:
b. b, adding 125ml of a reagent solution which is prepared by compounding sodium dodecyl benzene sulfonate, dodecyl betaine and sodium silicate in a mass ratio of 2:1:2 and has a total concentration of 1g/L into the oily sludge soaked in the step a, and washing at 60 ℃ and a rotation speed of 300rpm for 30 min;
centrifugal separation:
c. and c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: and (3) separating for 15min in a centrifuge at the rotating speed of 3000rpm to finish the treatment of oil sludge at the bottom of the tank, wherein the oil removal rate is 68.28 percent by calculation.
Example 6
Soaking:
a. weighing 25g of oily sludge, adding 5ml of cyclohexane, and intermittently shaking and soaking for 10min under a shaking condition;
washing the medicament:
b. b, adding 125ml of a reagent solution which is prepared by compounding lauryl sodium sulfate, dodecyl betaine and sodium silicate in a mass ratio of 2:1:2 and has a total concentration of 1g/L into the oily sludge soaked in the step a, and washing at 50 ℃ and a rotation speed of 150rpm for 90 min;
centrifugal separation:
c. and c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: and (3) separating for 15min in a centrifuge at the rotating speed of 3000rpm to finish the treatment of oil sludge at the bottom of the tank, wherein the oil removal rate is 67.84% by calculation.
example 7
Soaking:
a. weighing 25g of oily sludge, adding 10ml of n-hexane, and intermittently shaking and soaking for 10min under a shaking condition;
Washing the medicament:
b. B, adding 90ml of a reagent solution which is prepared by compounding lauryl sodium sulfate, dodecyl betaine and sodium silicate in a mass ratio of 3:2:2 and has a total concentration of 1g/L into the oily sludge soaked in the step a, and washing at 70 ℃ and a rotation speed of 200rpm for 60 min;
centrifugal separation:
c. And c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: and (3) separating for 15min in a centrifuge at the rotating speed of 3000rpm to finish the treatment of oil sludge at the bottom of the tank, wherein the oil removal rate is 72.28% by calculation.
example 8
soaking:
a. weighing 25g of oily sludge, adding 20ml of kerosene, and intermittently shaking and soaking for 10min under a shaking condition;
Washing the medicament:
b. b, adding 80ml of a reagent solution with the total concentration of 5g/L and compounded by sodium dodecyl sulfate, dodecyl betaine and sodium carbonate in a mass ratio of 4:3:2 into the oily sludge soaked in the step a, and washing at the temperature of 70 ℃ and the rotating speed of 150rpm for 75 min;
centrifugal separation:
c. And c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: and (3) separating for 15min in a centrifuge at the rotating speed of 3000rpm to finish the treatment of oil sludge at the bottom of the tank, wherein the oil removal rate is 82.21% by calculation.
example 9
soaking:
a. Weighing 25g of oily sludge, adding 10ml of kerosene, and intermittently shaking and soaking for 5min under a shaking condition;
Washing the medicament:
b. b, adding 80ml of a medicament solution which is compounded by sodium dodecyl sulfate, span-80 and sodium carbonate in a mass ratio of 2:1:2 and has a total concentration of 10g/L into the oily sludge soaked in the step a, and washing at the temperature of 60 ℃ and the rotating speed of 200rpm for 90 min;
Centrifugal separation:
c. And c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: and (3) separating for 15min in a centrifuge at the rotating speed of 3000rpm to finish the treatment of oil sludge at the bottom of the tank, wherein the oil removal rate is 85.06% by calculation.
example 10
soaking:
a. Weighing 25g of oily sludge, adding 10ml of n-heptane, and intermittently shaking and soaking for 10min under a shaking condition;
washing the medicament:
b. B, adding 90ml of reagent solution which is compounded by lauryl sodium sulfate, TX-100 and sodium carbonate in a mass ratio of 2:1:2 and has a total concentration of 15g/L into the oily sludge soaked in the step a, and washing at 70 ℃ and a rotation speed of 200rpm for 60 min;
centrifugal separation:
c. And c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: and (3) separating for 15min in a centrifuge at the rotating speed of 3000rpm to finish the treatment of oil sludge at the bottom of the tank, wherein the oil removal rate is 83.36% by calculation.
example 11
Soaking:
a. Weighing 25g of oily sludge, adding 20ml of gasoline, and intermittently shaking and soaking for 10min under a shaking condition;
washing the medicament:
b. B, adding 80ml of reagent solution which is prepared by compounding alkyl diphenyl ether disulfonate, dodecyl betaine and sodium bicarbonate with the mass ratio of 3:1:1 and has the total concentration of 20g/L into the oily sludge soaked in the step a, and washing at the temperature of 70 ℃ and the rotating speed of 200rpm for 60 min;
centrifugal separation:
c. And c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: and (3) separating for 10min in a centrifuge at the rotating speed of 3000rpm to finish the treatment of oil sludge at the bottom of the tank, wherein the oil removal rate is 85.58 percent by calculation.
Example 12
soaking:
a. weighing 25g of oily sludge, adding 25ml of gasoline, and intermittently shaking and soaking for 10min under a shaking condition;
washing the medicament:
b. b, adding 70ml of a reagent solution which is prepared by compounding alkyl diphenyl ether disulfonate, dodecyl betaine and sodium bicarbonate with the mass ratio of 1:3:1 and has the total concentration of 5g/L into the oily sludge soaked in the step a, and washing at the temperature of 80 ℃ and the rotating speed of 200rpm for 60 min;
centrifugal separation:
c. And c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: separating for 15min in a centrifuge at the rotating speed of 3500rpm to finish the treatment of oil sludge at the bottom of the tank, and calculating the oil removal rate to be 83.54%.
example 13
soaking:
a. weighing 25g of oily sludge, adding 10ml of n-pentane, and intermittently shaking and soaking for 10min under a shaking condition;
washing the medicament:
b. b, adding 100ml of a reagent solution which is prepared by compounding alkyl diphenyl ether disulfonate, dodecyl betaine and sodium bicarbonate with the mass ratio of 2:2:1 and has the total concentration of 20g/L into the oily sludge soaked in the step a, and washing at the temperature of 70 ℃ and the rotating speed of 200rpm for 60 min;
centrifugal separation:
c. and c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: and (3) separating for 10min in a centrifuge at the rotating speed of 2500rpm to finish the treatment of oil sludge at the bottom of the tank, wherein the oil removal rate is 85.61 percent by calculation.
Example 14
soaking:
a. Weighing 25g of oily sludge, adding 10ml of high-boiling-point petroleum ether, and intermittently shaking and soaking for 30min under a shaking condition;
washing the medicament:
b. B, adding 100ml of a reagent solution which is prepared by compounding alkyl diphenyl ether disulfonate, TX-100 and sodium bicarbonate with the mass ratio of 2:2:1 and has the total concentration of 20g/L into the oily sludge soaked in the step a, and washing at the temperature of 80 ℃ and the rotating speed of 300rpm for 60 min;
centrifugal separation:
c. And c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: separating for 5min in a centrifuge at the rotating speed of 2000rpm to finish the treatment of oil sludge at the bottom of the tank, and calculating the oil removal rate to be 78.23%.
example 15
soaking:
a. weighing 25g of oily sludge, adding 15ml of n-hexane, and intermittently shaking and soaking for 30min under a shaking condition;
washing the medicament:
b. b, adding 85ml of reagent solution which is compounded by alkyl diphenyl ether disulfonate, dodecyl betaine and sodium carbonate and has the total concentration of 15g/L and the mass ratio of 3:2:1 into the oily sludge soaked in the step a, and washing at the temperature of 80 ℃ and the rotating speed of 300rpm for 60 min;
Centrifugal separation:
c. and c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: separating for 5min in a centrifuge at the rotating speed of 1800rpm, namely finishing the treatment of the oil sludge at the bottom of the tank, and calculating the oil removal rate to be 80.41%.
Claims (1)
1. a method for efficiently treating tank bottom oil sludge is characterized by comprising the following steps:
soaking:
a. adding an organic solvent with the mass 0.2-1 time of that of the oily sludge, and soaking for 5-30min under a shaking condition, wherein the organic solvent is n-hexane, n-heptane, n-pentane, cyclohexane, high-boiling-point petroleum ether, kerosene or gasoline;
Washing the medicament:
b. b, adding a washing agent aqueous solution with the mass being 3-5 times that of the oily sludge soaked in the step a, and washing at the temperature of 50-80 ℃ and the rotating speed of 150-300rpm for 30-90min, wherein the agent is prepared from an active assistant and a surfactant according to the mass ratio of 1:2-4, and the active assistant is sodium silicate, sodium bicarbonate or sodium carbonate; the surfactant is formed by compounding any one of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate and alkyl diphenyl ether disulfonate with any one of span 80, TX-100 or dodecyl betaine in a mass ratio of 1:0.5-2, the total concentration of the medicament is 1-20g/L,
centrifugal separation:
c. and c, performing three-phase separation on the oil sludge washed in the step b by adopting a three-phase separation means, wherein the centrifugal conditions are as follows: separating for 5-15min in a centrifuge at the rotating speed of 1800-3500rpm, and finishing the treatment of the oil sludge at the bottom of the tank.
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| CN112851057A (en) * | 2020-12-23 | 2021-05-28 | 湖南长科诚享石化科技有限公司 | Method and system for treating oily sludge |
| CN113003922A (en) * | 2021-03-04 | 2021-06-22 | 山东科技大学 | Integrated efficient hot washing-advanced oxidation combined oily sludge treatment system and oily sludge treatment method |
| CN113003921A (en) * | 2021-03-04 | 2021-06-22 | 山东科技大学 | Method for treating oily sludge by combining hot washing and oxidation |
| CN114477714A (en) * | 2021-12-27 | 2022-05-13 | 上海丛麟环保科技股份有限公司 | Recovery treatment method for tank cleaning oil sludge |
| CN114713619A (en) * | 2022-04-07 | 2022-07-08 | 中石化石油工程技术服务有限公司 | Treatment method of soil polluted by aged crude oil |
| CN115232681A (en) * | 2022-04-27 | 2022-10-25 | 武汉鸿鑫天环保工程有限公司 | Preparation method of tank bottom oil sludge cleaning agent, cleaning agent and tank bottom oil sludge cleaning process |
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Application publication date: 20191213 |