关键词: 炼化企业, 检修, 高浓度污水, 调质配比, 污水汽提

Abstract: The high concentration sewage produced during the overhaul of refining and chemical plant of F company is difficult to be treated because its poor quality and large quantity, which exceeds the treatment capacity of the sewage treatment unit, so it can only be continuously stored in the crude oil tank of the pant. Through using the rich capacity of the two columns of the sewage stripping unit, the COD concentration of high concentration sewage can be reduced to 248 mg/L, so as to meet the requirements of biochemical influent water quality, and the high concentration sewage stored in the crude oil tank of the plant can be treated quickly. It avoids the lack of time for static dehydration and waiting for analysis results due to the occupation of the crude oil tank, which makes it difficult to provide qualified feedstock with water content for the atmospheric and vacuum unit, and brings harm to its safety production. It also prevents the impact of high concentration overhaul sewage on sewage treatment system and ensures the safe operation of refining-petrochemical integration.

Key words: refining and chemical enterprises, overhaul, high concentration sewage, modifying ratio, sewage stripping