Shale Oil Sludge Treatment Process

Abstract

The invention discloses a shale oil sludge treatment technology. The technology comprises the following steps: collecting shale oil sludge, preheating, adding a dehydrating agent, carrying out preliminary oil-water separation to make the water content reduce to 30-40%, adding a dispersant, carrying out a stirring reaction for 1-2h, carrying out heat insulation settlement, sending the preliminarily separated shale oil to a secondary settlement tank, settling, and separating to obtain shale oil which is finished shale oil. The technology has the following advantages: shale oil sludge generated in all steps and links of the extraction of shale oil from oil shale is collected, so a certain amount of shale oil can be extracted afresh, and the environmental pollution caused by the direct emission of the shale oil sludge is avoided; and residual sludge residues obtained after the extraction of the shale oil sludge meet the national standard of the oil content of 5%, can be directly harmlessly backfilled, or can be mixed with coal after being dried to be used as a power generating fuel, and can also be used in the production of bricks, cements and other building materials in order to make certain economic benefits and achieve the purpose of environmental protection.

Description

【Technical field】 [0001] The invention relates to the fields of petrochemical industry and environmental protection, in particular to a shale oil sludge treatment process. 【Background technique】 [0002] Oil shale is a kind of mineral resource with abundant reserves but hardly being well utilized. Oil shale is a kind of fine-grained sedimentary rock rich in organic matter, with fine bedding, and combustible. The vast majority of organic matter in oil shale is oil-forming substances that are insoluble in common organic solvents, commonly known as "kerogen", so oil shale is also called "kerogen shale". Oil shale is an energy mineral, which belongs to low calorific value solid fossil fuel and one of combustible minerals. The content of kerogen in oil shale is about 10% to 50%. Kerogen is composed of complex high-molecular organic compounds, rich in aliphatic hydrocarbon structures, and less aromatic hydrocarbon structures. Organic compounds are mainly composed of carbon, hy...

AI Technical Summary

Problems solved by technology

In my country, shale oil is often referred to as man-made petroleum, and in each step of extracting shale oil from oil shale, a kind of shale oil sludge will be produced. The treatment methods for these shale oil sludge usually include pressure filtration and Centrifugal separation and drying method, the oil content of the oil sludge after these two methods can not meet the national standard requirements, and the final sludge and waste water will cause secondary pollution when discharged; there is also a method using solvent extraction, which The solvents used in this method are benzene or aromatic solvents, which are easy to volatilize after heating during processing, have high toxicity, and have a large addition ratio, which has a great impact on the indicators of the treated shale oil

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