New technology for oil sludge processing

Abstract

The invention which belongs to the dangerous waste processing field relates to oil sludge processing and provides a new technology for the oil sludge processing. The technology is mainly characterized in that: after the oil sludge is processed with steps of dehydration, extraction, deposition, evaporation, extraction, pumping filtration, drying and the like, the content of oil in soil is 1% and accords with discharge standards, the total loss of solvent oil is about 1%, the recovery rate of product oil is more than 99%, and no waste gases and no wastewater are discharged. The technology whichhas the advantages of scientific method, mature process, simple equipment and large investment-output benefit and allows great technical problems, environmental protection problems and production safety problems which are difficult to solve for a long time in the dangerous waste processing field to be well solved deserves to be popularized and applied to broad petroleum enterprises, petroleum byproduct enterprises, and plant oil processing and oil product storage and transportation enterprises.

Description

technical field [0001] The invention belongs to the field of waste separation and treatment, relates to sludge treatment, and proposes a new sludge treatment process. Background technique [0002] Oil sludge comes from a wide range of sources and belongs to hazardous waste. At present, whether the oil extraction plant is in the crude oil storage tank, or the refinery is in the crude oil pipeline, storage and transportation tank, or the refined oil, recycled waste oil is in the storage and transportation container, or lubricating oil, paraffin, vegetable oil are added in the refining and decolorization. After activated clay, as well as the sludge produced by landing oil, the oil content in the sludge is more than 30%, the water content is about 50%, and the soil accounts for about 15%. [0003] The commonly used sludge treatment methods have certain defects: [0004] 1. Concentrated stacking, waiting passively to find a good way to deal with it later, large investment in b...

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Problems solved by technology

[0004] 1. Concentrated stacking, waiting passively to find a good way to deal with it, building storage and dams requires a lot of investment, takes up a lot of land, and poses a great safety hazard;

[0005] 2. Underground burial, filling in waste wells or digging pits for burial, not only pollutes the ground, but also wastes resources;

[0006] 3. Combustion of fuel, mixed with pulverized coal to burn the boiler, it is difficult to mix the sludge evenly with the pulverized coal, which not only affects the combustion effect of the furnace, but also reduces the quality of ash powder;

[0007] 4. Mechanical filtration, using a plate and frame filter press to filter the oil sludge, the oil recovery rate is low, about 50%, and the other half of the residual oil is discharged with the residue;

[0008] 5. Surfactant, add surfactant, heat and cook to separate oil, the recovery rate is low, about 50%

[0009] 6. Solvent extraction, commonly used in the treatment of vegetable oil cakes, has a good effect, but is not suitable for the treatment of vegetable sludge. It has been proved by experiments that the effect is poor, and the recovery rate is only 60%.

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