摘要
旋流分离器因其紧凑高效在海上平台污水处理单元中被广泛应用。基于巴西某海上油田的污水实况,根据该油田FPSO的污水处理工艺及设计特点,通过对比分析常见的几种含油污水处理方法,并运用FLUENT软件,建立油-水旋流器几何模型,研究旋流分离器内部流场分布特性,综合分析分离性能随来液流速的变化规律。根据运行工况,当旋流器入口流速为3 m/s时,分离效率低于70%,分离效果不理想;当入口流速为7 m/s时,分离效率高于90%,分离后污水含油质量浓度低于100 mg/L。流速过高时,分离效率下降,这是由于流速过大,导致油滴破裂,甚至加剧乳化。这一规律可为今后海上平台污水处理工艺设计提供参考。在实际运用时,应根据油田污水性质、实际环境要求、油滴变形破裂及能耗,选择合适的处理工艺及最优的入口流速。
The swirl separators have been widely used in offshore platform sewage treatment units because of their compact efficiency.Based on the sewage situation of an offshore oilfield in Brazil,according to the sewage treatment process and design characteristics of the FPSO in oilfield,the geometric model of oil-water swirl separator is established by comparing and analyzing several common oily sewage treatment methods and using the software of FLUENT.In addition,through studying the internal distribution characteristics of swirl separator,the separation performance with the flow rate of incoming liquid is analyzed comprehensively.According to the operating conditions,when the inlet flow rate of the cyclone is 3 m/s,the separation efficiency is less than 70%,and the separation effect is not ideal.When the inlet flow rate is 7 m/s,the separation efficiency is higher than 90%,and the oil content of the separated sewage is less than 100 mg/L.When the flow rate is too high,the separation efficiency will be decreased,which is because the flow rate is too large,resulting in oil droplet rupture,and even intensified emulsification.The rule will be provided reference for the future design of offshore platform sewage treatment process.In the actual application,the appropriate treatment process and optimized inlet flow rate should be selected according to the properties of sewage,actual environmental requirements,oil droplet rupture deformation and energy consumption.
作者
罗佳琪
宋扬
张洪政
乔英云
LUO Jiaqi;SONG Yang;ZHANG Hongzheng;QIAO Yingyun(COSCO Shipping Shipyard&Engineering Co.,Ltd.(Nantong)/COSCO Shipping Offshore Engineering Co.,Ltd.(Qidong);Chemistry and Chemical Engineering,China University of Petroleum(East China))
出处
《石油石化节能与计量》
CAS
2023年第12期1-6,共6页
Energy Conservation and Measurement in Petroleum & Petrochemical Industry
基金
国家工业和信息化部高技术船舶项目-海上天然气大流程处理工艺关键技术研究(CJ09N20)。
