关键词: 含油污泥, 化学热洗技术, 标准, 工程应用

Abstract: As the main pollutant of petrochemical industry, the treatment of oily sludge has always troubled the enterprises. Oily sludge contains a large amount of crude oil and heavy metals and is classified as hazardous waste. If not disposed properly, it will not only cause environmental pollution, but also waste resources. The thermochemical cleaning is to use the chemical agent and hot water to act on the oily sludge to reduce the viscosity and realize the three-phase separation process of oil, water and solid. It has the advantages of convenient operation and low cost, however, the use of chemical agents may cause secondary pollution. This article summarizes and compares the oil sludge treatment standards at home and abroad, and summarizes the research progress of thermochemical cleaning technology. The effects of factors such as the type and concentration of cleaning agent, hot washing temperature, hot washing time, stirring speed, liquid-solid ratio on the treatment efficiency of oily sludge were mainly discussed. At the same time, this article describes the engineering application examples of oily sludge treatment at home and abroad, and points out the future development direction of thermochemical cleaning technology, in order to provide reference for the development of thermochemical cleaning technology.

Key words: oily sludge, thermochemical cleaning, standard, engineering applications