基于热力蒸汽压缩蒸发的油田污水淡化系统及分析  

Process simulation and analysis on thermal vapor compression based oilfield wastewater desalination systems

作　　者：李清方[1,2] 刘中良[1] 韩冰[1] 庞会中[2] 张建[2] 祝威[2] 

机构地区：[1]北京工业大学北京市传热与能源利用重点实验室,北京100124 [2]胜利油田勘察设计研究院公司,山东东营257026

出　　处：《化工学报》2012年第6期1859-1864,共6页CIESC Journal

基　　金：高等学校博士学科点专项科研基金项目(20091103110010);北京市科技计划项目(2011)~~

摘　　要：针对油田污水污染物成分复杂、污染性强不适合膜法脱盐的特点和淡水消耗与余热资源共存的实际,提出用热力蒸汽压缩(thermal vapor compression,TVC)蒸发技术对油田污水进行集中脱盐处理的技术方案。建立了基于TVC的油田污水脱盐系统的工艺流程设计计算模型,系统分析了蒸发温度等主要运行参数的影响。结果表明:系统造水比随蒸发温度的降低而增大,降低蒸发温度有助于减少主蒸汽消耗,但所付出的代价是总传热面积和污水泵流量的增大;TVC系统的热力学完善度相对较低,与多效蒸发系统联合使用是改善系统性能的基本途径之一。尽管如此,对于油田生产来说,当存在合适的余热资源时,简单的单效TVC系统仍不失为合理的技术方案。A thermal vapor compression（TVC）based desalination system for oilfield wastewater is proposed to solve the difficulties resulted from complex and highly polluting substances in the wastewater,since commonly used membrane methods are inapplicable.A mathematical model for process simulation and design is developed and the influence of evaporation temperature on the system performance is analyzed.The results show that the performance ratio increases as the evaporation temperature decreases.Lowering evaporation temperature may significantly reduce the steam consumption,but may greatly increase the heat transfer area and cooling water flow rate.

关 键 词：油田污水 脱盐 热力蒸汽压缩 数学模型 

分 类 号：TE99[石油与天然气工程—石油机械设备] TK09[动力工程及工程热物理]