关键词: 页岩油泥, 热化学清洗, 化学药剂, 回收, 环境, 污染

Abstract: Oil sludge is mainly produced in the oil fields and refineries，causing environment pollution，and wasting some oil resources. Recent research on oil sludge cleaning was limited to oil sludge treatment，with little focus on oil shale sludge treatment. This paper presented thermo chemical method to treat oil shale sludge. Oil shale sludge from Wangqing Oil Refinery was used as the sample. Washing media for oil shale sludge treatment was pure water. The study investigated the influencing factors including temperature，agitate time，agitate rate，liquid-solid ratio on the washing efficiency，and the initial conditions were determined. After screening and remixing，AEO-9∶Na2SiO3=1∶2（the mass ratio）was regarded as the optimal ratio. Orthogonal experiments were conducted to determine optimal washing parameters. The results showed that residual oil rate was reduced to 3.03% from 45.26% in the sample after agitating for 30 min at 75℃ with agitation speed at 220 r/min，liquid-solid ratio at 8∶1，chemical reagent concentration at 4.0g/L. Chemical reagent solvents can be recycled，oil recovery can be used after treatment. After mixing，the residual oil sludge was treated with sulfur-fixing agent and shale dust，then the mixture was molded and dried. The final products can be sent to retort for low temperature retorting.

Key words: oil shale sludge, thermo chemical washing, chemical reagent, recovery, environment, pollution