一、概况炼油厂、石油化工厂、集输站和油库排出的污水中含有油、硫、酚、氨以及悬浮固体等污染物,必须进行净化处理后才允许排入江河。以往常采用由隔油、空气浮选和生化曝气(活性污泥法)三步骤组成的“老三套”处理工艺,虽然处理过的净化污水能达到严格的排水标准,但在处理过程中产生浮渣和剩余活性污泥,需要用脱水和焚烧的办法进行再处理。这不单产生焚烧炉的烟气污 I. Overview Sewage discharged from refineries, petrochemical plants, gathering stations and oil depots contains pollutants such as oil, sulfur, phenol, ammonia and suspended solids and must be purified before being allowed to enter the river. In the past, the “old three sets” of three-step process consisting of oil separation, air flotation and biochemical aeration (activated sludge process) were adopted. Although the treated purified sewage can meet the strict drainage standards, during the treatment Scum and excess activated sludge are generated and need to be reprocessed by dehydration and incineration. This not only produces fouling of the incinerator