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Method for cleaning aged oil sludge

A technology for sludge and cleaning fluid, applied in the field of environmental remediation, can solve the problems of reducing light components and increasing difficulty, and achieves the effect of good elution rate and great harm.

Inactive Publication Date: 2015-09-02
NANKAI UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

If oil sludge is not treated in time, it will be piled up for a long time, and after air-drying and aging, the light components will decrease, resulting in higher molecular weight, viscosity and density of pollutants, and the proportion of colloid and asphaltene petroleum heavy components is large. Stronger adhesion, which makes sludge handling more difficult

Method used

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  • Method for cleaning aged oil sludge

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Embodiment

[0012] (1) The aged oil sludge in this example was taken from Dagang Oilfield. The oil sludge was air-dried in a cool and ventilated place, passed through a 2mm sieve to remove impurities, and stored in a sealed bag for later use. Table 1 shows the total petroleum hydrocarbon content in oil sludge, and the content of four components: saturated hydrocarbons, aromatics, asphaltenes, and non-hydrocarbons. It can be seen from the table that the total petroleum hydrocarbon content (TPH) is 389g / kg, of which asphaltenes account for 15.7%, non-hydrocarbons account for 19.6%, the content of heavy components is relatively high, and the aging degree of oil sludge is relatively large.

[0013] Table 1 Oil content of oil sludge in Dagang and the proportion of each component

[0014]

[0015] (2) cleaning of greasy sludge: adopt 150ml beaker as scrubber, add 100ml deionized water, be 5.1% according to total mass concentration, mass ratio is the ratio of 0.1:1:4 to add rhamnolipid 0.1g, ...

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Abstract

The invention provides a method for cleaning aged oil sludge. The method comprises the steps of firstly collecting aged oil sludge from an oil field, compounding a biological surfactant (rhamnolipid), a chemical surfactant (TX-100) and an aid (NaSiO39H2O) in a certain mass ratio under conditions of certain temperature, stirring speed, stirring time, liquid-solid ratio and mass concentration, cleaning the aged oil sludge, standing, and separating after an oil phase, a liquid phase and a solid phase are layered. Due to large proportion of petroleum heavy components in the aged oil sludge, the aged oil sludge is difficult to clean. According to the method, the biological surfactant, the chemical surfactant and the aid are compounded to clean the aged oil sludge, so that a relatively good elution effect is achieved, and the biological surfactant, the chemical surfactant and the aid have a synergistic effect during the compounding and cleaning.

Description

technical field [0001] The invention relates to a cleaning method for cleaning aged oil sludge, in particular to a technical method for cleaning aged oil sludge by screening compound agents, which belongs to the technical field of environmental restoration. Background technique [0002] In the petroleum industry, a large amount of oil sludge is unavoidably produced in the process of oil production, storage, transportation, processing, etc. The overall composition of oil sludge is complex, and arbitrary discharge and stacking will pose a threat to the surrounding environment and human beings. The U.S. Environmental Protection Agency (US EPA) lists it as a priority pollutant, and my country has included petroleum sludge in the "National Hazardous Waste Catalog". If oil sludge is not treated in time, it will be piled up for a long time, and after air-drying and aging, the light components will decrease, resulting in higher molecular weight, viscosity and density of pollutants. ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C11D1/825C11D3/08
Inventor 唐景春杨月明
Owner NANKAI UNIV
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