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Extracting solvent, method for treating waste based on same and application of method

A technology for extracting solvents and wastes, applied in solvent extraction, hydrocarbon oil treatment, separation methods, etc., can solve the problems of complex process, high energy consumption, secondary pollution, etc., achieve high extraction efficiency, simple process, and no pollution The effect of secondary pollution

Inactive Publication Date: 2017-08-18
CNPC SICHUAN GASOLINEEUM GEOPHYSICAL PROSPECTING ENG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of narrow application range, high energy consumption, complex process, high cost and easy to cause secondary pollution in the prior art of oily waste treatment technology

Method used

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  • Extracting solvent, method for treating waste based on same and application of method
  • Extracting solvent, method for treating waste based on same and application of method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides an extraction solvent, which is composed of the following components by mass:

[0033] 60 parts of trichlorethylene, 40 parts of n-heptane.

[0034] The method for treating oily waste based on this extraction solvent is completed according to the following steps: take trichlorethylene and n-heptane respectively according to the proportioning ratio, prepare 100g extraction solvent, and then weigh oily drill cuttings (8.27% oil content, water content 0.51%) 200g was mixed and stirred with the extraction solvent, the stirring time was 15min, and the stirring speed was 200rpm; the solid-liquid phase was separated by a centrifugal separator, the centrifugal speed was 1500rpm, and the centrifugal time was 10min; The temperature is not higher than 140°C, and the water and extraction solvent in the solid phase are recovered; the liquid phase is poured into the distillation device, and the distillation temperature is not higher than 140°C, and the water,...

Embodiment 2

[0036] This embodiment provides an extraction solvent, which is composed of the following components by mass:

[0037] 55 parts of trichlorethylene, 45 parts of n-octane.

[0038] The method for treating oily waste based on this extraction solvent is completed according to the following steps: take trichlorethylene and n-octane respectively according to the proportioning ratio, prepare 100g extraction solvent, and then weigh a certain oilfield oily drill cuttings (oil content 15.82%, water content 1.36%) 95g was mixed and stirred with the extraction solvent, the stirring time was 10min, and the stirring speed was 300rpm; the solid-liquid phase was separated by a centrifugal separator, the centrifugal speed was 2000rpm, and the centrifugal time was 8min; The temperature is not higher than 140°C, and the water and extraction solvent in the solid phase are recovered; the liquid phase is poured into the distillation device, and the distillation temperature is not higher than 140°C...

Embodiment 3

[0040] This embodiment provides an extraction solvent, which is composed of the following components by mass:

[0041] 70 parts of tetrachlorethylene, 30 parts of n-heptane.

[0042] The method for treating oily waste based on this extraction solvent is completed according to the following steps: take tetrachloroethylene and normal heptane respectively according to the proportioning ratio, prepare 100g extraction solvent, and then weigh a certain oil field oily drill cuttings (oil content 25.74%, water content 3.15%) 60g is mixed and stirred with the extraction solvent, the stirring time is 15min, and the stirring speed is 100rpm; the solid-liquid phase is separated by a centrifugal separator, the centrifugal speed is 3000rpm, and the centrifugal time is 5min; The temperature is not higher than 140°C, and the water and extraction solvent in the solid phase are recovered; the liquid phase is poured into the distillation device, and the distillation temperature is not higher tha...

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Abstract

The invention provides an extracting solvent, a method for treating waste based on the same and application of the method. The extracting solvent is prepared from halogenated hydrocarbons and alkanes. The method comprises the following steps: mixing and stirring the extracting solvent with oil-containing waste; then separating solid-liquid phases through centrifuging; pouring a separated solid phase into a distillation device for heating and drying, and recycling water and the extracting solvent in the solid phase; pouring a separated liquid phase into the distillation device, and recycling the water, oils and the extracting solvent. According to the extracting solvent, the method and the application, provided by the invention, the problems that an oil-containing waste treatment technology in the prior art is narrow in application range, high in energy consumption, complicated in technology, high in cost, easy to cause secondary pollution and the like are solved; the extracting solvent, the method and the application, provided by the invention, have the advantages that not only can oil-based drillings generated during a drilling process be treated, but also oil-containing sludge generated during oil field exploitation and transportation can be treated, recycling and reutilization of the oil and the extracting solvent can be realized, a technological process is relatively simple, the extracting efficiency is high, centralized treatment is suited, harmlessness and reclamation can be realized, the secondary pollution cannot be caused, and the like.

Description

technical field [0001] The invention belongs to the technical field of oil pollution treatment, and in particular relates to an extraction solvent and its method and application for treating waste based on the extraction solvent. Background technique [0002] Oily waste in oil fields mainly includes oily drilling cuttings and oily sludge, which come from oil and gas drilling, development, transportation and other links. At present, with the continuous increase in the development of unconventional energy sources such as shale gas and tight gas in the world, the application of oil-based drilling fluid technology is becoming more and more common. During the drilling process, a large amount of oily cuttings will be produced. On the other hand, Oil is carried from the formation to the ground, and settles in various containers, tanks, pipelines and other facilities to produce oily sludge. If these wastes are not properly disposed of, they will cause varying degrees of impact and ...

Claims

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Application Information

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IPC IPC(8): B01D11/00C10G1/04
CPCB01D11/00C10G1/04C10G1/045C10G2300/1003
Inventor 凡帆王长宁杨斌吴满祥高洁张小平金祥哲陈磊赵海峰郭康蔺文洁王国庆丁磊陈龙蒋振伟
Owner CNPC SICHUAN GASOLINEEUM GEOPHYSICAL PROSPECTING ENG TECH RES INST
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