CN101269380B - Method for removing oil-containing drill cuttings and oil component in oil polluted soil - Google Patents
Method for removing oil-containing drill cuttings and oil component in oil polluted soil Download PDFInfo
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- CN101269380B CN101269380B CN2008100531448A CN200810053144A CN101269380B CN 101269380 B CN101269380 B CN 101269380B CN 2008100531448 A CN2008100531448 A CN 2008100531448A CN 200810053144 A CN200810053144 A CN 200810053144A CN 101269380 B CN101269380 B CN 101269380B
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Abstract
The invention discloses a method for removing oil in drill cuttings containing oil and soil contaminated from oil. The method includes the following steps: an organic solvent and drill cuttings containing oil or soil contaminated from oil are mixed in a mixer according to the weight ratio of 0.2:2; the mixture is sent into a drainer for one-step liquid-solid separation so as to get one-step solid phase materials and one-step liquid phase materials; the one-step liquid phase materials are sent to a centrifuge for second-stage liquid-solid separation so as to get second-stage solid phase materials and second-stage liquid phase materials; the one-step solid phase materials are sent to a drier for drying and solid phase disposition; the second-stage solid phase materials are sent to the mixer; the second-stage liquid phase materials are sent to a solvent evaporator; the organic solvent is separated and sent to the mixer for recycling; the oil-base drilling fluid separated by the evaporator is cleaned and decolored. The method provided by the invention reaches the purpose of pollution-free processing of soil contaminated from oil or drill cuttings containing oil, besides, the oil can be recycled, thereby increasing the economic benefits.
Description
Technical field
The present invention relates to a kind of oil component sweep-out method, relate in particular to a kind of oil-contained drilling cuttings and by the oil component sweep-out method in the oily contaminated soil.
Background technology
The function of drilling mud is for protecting the borehole wall, prevent the cooling of metal parts burn into and lubricate drill bit, down-hole pressure control, the most important thing is that the drilling cuttings that will constantly produce is transported to the face of land.So having a lot of superiority, used in a large number oil-base mud.The drilling cuttings that is polluted by oil-base mud can produce a lot of environmental problems, must handle to reach the purpose of environmental protection, reclaims oil base simultaneously and has a great economic significance, and can save drilling cost.
In the past, drilling cuttings particularly from the drilling cuttings of offshore platforms, all has been exhausted into the sea, and environment has been formed beyond measure destruction.Also there is very big problem in the processing that is spread out over land greatly drill cuttings.People try every possible means and remove oil in the oily sludge: this is comprising injecting annular space or safe formation, burning method, heat treating process (way of distillation), drilling cuttings cleaning technique, and the main drawback of these methods is of poor benefits, and security is not high, and disposal ability is limited.
Equally, in processes such as land drilling well and the processing of oil transportation storage, all can produce oil spilling and leakage, soil is polluted.These all need to carry out collection and treatment, and to reduce environmental hazard, its processing method and drilling cuttings processing method are basic identical.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of purpose that reaches the processing of pollution-freeization of oil-contained drilling cuttings is provided, and can therefrom reclaim oil, increased a kind of oil-contained drilling cuttings of economic benefit and by the oil component sweep-out method in the oily contaminated soil.
A kind of oil-contained drilling cuttings of the present invention and by the oil component sweep-out method in the oily contaminated soil, it may further comprise the steps:
(1) in blender, mixes with the weight ratio of 0.2-2 with organic solvent and oil-contained drilling cuttings or by oily contaminated soil, thereby formed a kind of solid phase and the mixture of the liquid phase formed with organic solvent and oil;
(2) described mixture is sent into filter and carried out the one-level Separation of Solid and Liquid in the dried machine, obtain one-level solid-phase material and one-level liquid phase material;
(3) described one-level liquid phase material is sent into centrifuge and carry out the secondary Separation of Solid and Liquid, obtain secondary solid-phase material and secondary liquid phase material;
(4) described one-level solid-phase material being sent into drying machine carries out drying and carries out the solid phase disposal;
(5) described secondary solid-phase material is returned to described blender, form new solidliquid mixture;
(6) described secondary liquid phase material is sent into the solvent evaporimeter, described organic solvent is separated to send into to reclaim in the described blender again use;
(7) will carry out purification and decoloration by the isolated drilling fluid oil base of described evaporimeter, recycle then.
Adopt method of the present invention can utilize callable organic solvent from drilling cuttings, to separate oil-contained drilling cuttings or by the oil base in the oily contaminated soil, these chemical addition agents then can be separated to reclaim from oil base and use by distillation, and the solid portion in those oil-contained drilling cuttings can come back in the environment fully through simple disposal technology.Than adopting centrifuge to carry out Separation of Solid and Liquid lot of superiority is arranged owing to adopted the dried machine of filter (centrifugal filtration drying machine) in the methods of the invention: 1, use solvent still less, reduce the solvent load of 50-90%; 2, discharge solid phase liquid content is low, reduces to about 1% by about 20%; 3, treating capacity and efficient improve a lot; 4, energy consumption reduces a lot, and dry power consumption of minimizing and solvent distillation are consumed energy.Adopt this method to reach oil-contained drilling cuttings in a word or by the purpose of oily pollution-freeization of contaminated soil processing, and can therefrom reclaim oil, increased economic benefit, have sizable economy and environmental advantage.
Description of drawings
Accompanying drawing is a kind of oil-contained drilling cuttings of the present invention and by the process chart of the oil component sweep-out method in the oily contaminated soil.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in detail.
A kind of oil-contained drilling cuttings of the present invention in conjunction with the accompanying drawings and by the oil component sweep-out method in the oily contaminated soil, it may further comprise the steps: mix in blender with the weight ratio of 0.2-2 with organic solvent and oil-contained drilling cuttings or by oily contaminated soil, thereby formed a kind of solid phase and the mixture of the liquid phase formed with organic solvent and oil; Described mixture is sent into the dried machine of filter carry out the one-level Separation of Solid and Liquid, obtain one-level solid-phase material and one-level liquid phase material; Described one-level liquid phase material is sent into centrifuge carry out the secondary Separation of Solid and Liquid, obtain secondary solid-phase material and secondary liquid phase material; Described one-level solid-phase material is sent into drying machine carry out drying and carry out the solid phase disposal, described solid phase is disposed can be landfill or biological treatment etc.; Described secondary solid-phase material is returned to described blender, form new solidliquid mixture; Described secondary liquid phase material is sent into solvent evaporimeter or rectifying column equal solvent reclaimer, described organic solvent separated to send in the described blender to reclaim again use, described solvent evaporimeter can be buied in market and according to the difference of the boiling point of the organic solvent that uses, control operation temperature and pressure; To carry out purification and decoloration by the isolated drilling fluid oil base of described evaporimeter, recycle then.Filtering dried machine and centrifuge also can buy in producer according to the treating capacity type selecting.Described organic solvent can be among at least one in solvent naphtha, ethyl acetate, butyl acetate, capryl acetate, the n-hexane, ethyl acetate preferably wherein, because ethyl acetate does not have toxicity, and degraded easily, thereby be very favorable for environmental protection.
Embodiment 1
Solvent naphtha and oil-contained drilling cuttings are mixed in blender with 0.5 weight ratio, thereby formed a kind of solid phase and the mixture of the liquid phase formed with organic solvent and oil; Described mixture is sent into the dried machine of filter carry out the one-level Separation of Solid and Liquid, obtain one-level solid-phase material and one-level liquid phase material; Described one-level liquid phase material is sent into centrifuge carry out the secondary Separation of Solid and Liquid, obtain secondary solid-phase material and secondary liquid phase material; Described one-level solid-phase material is sent into drying machine carry out drying and landfill; Described secondary solid-phase material is returned to described blender, form new solidliquid mixture; Described secondary liquid phase material is sent into the solvent evaporimeter, is that 85 ℃, pressure are under the 0.1Mpa in temperature, described solvent naphtha is separated to send into to reclaim in the described blender again use; To carry out purification and decoloration by the isolated drilling fluid oil base of described evaporimeter, recycle then.
Embodiment 2
Ethyl acetate and oil-contained drilling cuttings are mixed in blender with 1 weight ratio, thereby formed a kind of solid phase and the mixture of the liquid phase formed with organic solvent and oil; Described mixture is sent into the dried machine of filter carry out the one-level Separation of Solid and Liquid, obtain one-level solid-phase material and one-level liquid phase material; Described one-level liquid phase material is sent into centrifuge carry out the secondary Separation of Solid and Liquid, obtain secondary solid-phase material and secondary liquid phase material; Described one-level solid-phase material is sent into drying machine carry out drying and landfill; Described secondary solid-phase material is returned to described blender, form new solidliquid mixture; Described secondary liquid phase material is sent into the solvent evaporimeter, is that 90 ℃, pressure are under the 0.1Mpa in temperature, described ethyl acetate is separated to send into to reclaim in the described blender again use; To carry out purification and decoloration by the isolated drilling fluid oil base of described evaporimeter, recycle then.
Embodiment 3
In blender, mix with 2 weight ratio with butyl acetate and n-hexane with by oily contaminated soil, thereby formed a kind of solid phase and the mixture of the liquid phase formed with organic solvent and oil; Described mixture is sent into the dried machine of filter carry out the one-level Separation of Solid and Liquid, obtain one-level solid-phase material and one-level liquid phase material; Described one-level liquid phase material is sent into centrifuge carry out the secondary Separation of Solid and Liquid, obtain secondary solid-phase material and secondary liquid phase material; Described one-level solid-phase material is sent into drying machine carry out drying and landfill; Described secondary solid-phase material is returned to described blender, form new solidliquid mixture; Described secondary liquid phase material is sent into the solvent evaporimeter, in temperature is that 90 ℃, pressure are under the 0.1Mpa, described n-hexane is separated, and is that 93 ℃, pressure are that following described butyl acetate of 0.1Mpa separated in temperature, sends into to reclaim in the described blender again and uses; To carry out purification and decoloration by the isolated drilling fluid oil base of described evaporimeter, recycle then.
Embodiment 4
In blender, mix with 0.2 weight ratio with capryl acetate with by oily contaminated soil, thereby formed a kind of solid phase and the mixture of the liquid phase formed with organic solvent and oil; Described mixture is sent into the dried machine of filter carry out the one-level Separation of Solid and Liquid, obtain one-level solid-phase material and one-level liquid phase material; Described one-level liquid phase material is sent into centrifuge carry out the secondary Separation of Solid and Liquid, obtain secondary solid-phase material and secondary liquid phase material; Described one-level solid-phase material is sent into drying machine carry out drying and landfill; Described secondary solid-phase material is returned to described blender, form new solidliquid mixture; Described secondary liquid phase material is sent into the solvent evaporimeter, under 75 ℃ of temperature, pressure 0.1Mpa, described capryl acetate separated to send in the described blender to reclaim again use; To carry out purification and decoloration by the isolated drilling fluid oil base of described evaporimeter, recycle then.
Claims (2)
1. an oil-contained drilling cuttings and by the oil component sweep-out method in the oily contaminated soil is characterized in that it may further comprise the steps:
(1) in blender, mixes with the weight ratio of 0.2-2 with organic solvent and oil-contained drilling cuttings or by oily contaminated soil, thereby formed a kind of solid phase and the mixture of the liquid phase formed with organic solvent and oil;
(2) described mixture is sent into filter and carried out the one-level Separation of Solid and Liquid in the dried machine, obtain one-level solid-phase material and one-level liquid phase material;
(3) described one-level liquid phase material is sent into centrifuge and carry out the secondary Separation of Solid and Liquid, obtain secondary solid-phase material and secondary liquid phase material;
(4) described one-level solid-phase material being sent into drying machine carries out drying and carries out the solid phase disposal;
(5) described secondary solid-phase material is returned to described blender, form new solidliquid mixture;
(6) described secondary liquid phase material is sent into the solvent evaporimeter, described organic solvent is separated to send into to reclaim in the described blender again use;
(7) will carry out purification and decoloration by the isolated drilling fluid oil base of described evaporimeter, recycle then.
2. oil-contained drilling cuttings according to claim 1 and by the oil component sweep-out method in the oily contaminated soil is characterized in that: the organic solvent in the described step (1) is at least a in solvent naphtha, ethyl acetate, butyl acetate, capryl acetate, the n-hexane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100531448A CN101269380B (en) | 2008-05-15 | 2008-05-15 | Method for removing oil-containing drill cuttings and oil component in oil polluted soil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100531448A CN101269380B (en) | 2008-05-15 | 2008-05-15 | Method for removing oil-containing drill cuttings and oil component in oil polluted soil |
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| CN101269380A CN101269380A (en) | 2008-09-24 |
| CN101269380B true CN101269380B (en) | 2010-08-11 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103773408B (en) * | 2013-12-05 | 2016-03-30 | 西南石油大学 | One reclaims oil-base mud and oil base technique from oil-base mud drilling wastes |
| CN103736360B (en) * | 2013-12-05 | 2016-01-27 | 王兵 | Discard the medicament normal-temperature deep desorption recovery process of oil base in oil-base mud or drilling cuttings |
| NO20151452A1 (en) * | 2015-10-26 | 2017-04-27 | Norwegian Tech As | Method for separation of non-polar organic compounds from a material |
| CN108273843B (en) * | 2017-12-13 | 2021-03-09 | 中国石油天然气集团公司 | Leaching agent for oil-containing drill cuttings and oil-containing drilling waste and using method thereof |
| CN110468276A (en) * | 2019-08-12 | 2019-11-19 | 深圳市深投环保科技有限公司 | The processing method and processing system of greasy waste material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172284A (en) * | 2007-10-09 | 2008-05-07 | 中国海洋石油总公司 | Method for processing and recycling drill cuttings |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172284A (en) * | 2007-10-09 | 2008-05-07 | 中国海洋石油总公司 | Method for processing and recycling drill cuttings |
Non-Patent Citations (2)
| Title |
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| JP特开2000-202423A 2000.07.25 |
| JP特开平9-192531A 1997.07.29 |
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