炼油厂含油污泥干化焚烧及能耗分析

Drying Process and Incineration of Oily Sludge and Its Energy Consumption Analysis in an Oil Refinery

日益严格的环保要求促使环保投资的增大,压缩了炼油企业的利润空间,因此,环保设施的节能降耗成为重要的研究课题。某炼油厂采用"干化-焚烧"工艺处理含油污泥,该工艺成熟稳定,适合长周期运行,最大程度地实现减量和无害化,同时回收部分焚烧的热量作为干化单元的热源。结合该处理流程对设施能耗进行分析,提出两个节能降耗的措施。结果表明:设计工况下,该设施单位能耗为14 180.67 MJ/t污泥(含水率80%),通过调整操作控制含油污泥的含水率,可以将单位能耗降低4.7个百分点;在长周期运行条件及环保条件满足要求的情况下,改造或停用烟气再热器(GGH),可以将单位能耗降低3.1个百分点;若两种方法相结合,理论上单位能耗可以降低至13 070.03 MJ/t污泥,减少7.8个百分点。

Increasingly stringent environmental protection requirements impel to increase environmental protection investment, which squeezes the profit margin of oil refinery, therefore energy saving and consumption reduction of environmental protection facilities is also an important research subject. An oil refinery adopts the treatment process of oily sludge drying and incineration, this process is mature and stable, suitable for long-term operation. It can achieve the maximum reducing quantity and harmlessness, and recover portion of heat of incineration as the heat source of drying unit. In this paper,the energy consumption of this facility was analyzed combined with its treatment process, and two methods of energy saving and consumption reduction were put forward. The results show that, under the design conditions, the unit energy consumption of this facility is 14 180.67 MJ/t sludge（water content is 80%）. After controlling water content of oily sludge by adjusting operation parameters, the unit energy consumption can be decreased by 4.7%. Under the premise of meeting long-term operation and environmental protection standards, Gas Gas Heater（GGH） is modified or discontinued, which can decrease unit energy consumption by 3.1%. If combining two methods, in theory, unit energy consumption can reach to 13 070.03 MJ/t sludge, and is decreased by 7.8 %.