丙烯腈装置气液分离器的出口结构  

Exit Structure of the Mist Swirl Separators in Acrylonitrile Production Units

作　　者：魏伟胜[1] 杨彦文[1] 徐建[1] 范煜[1] 鲍晓军[1] 

机构地区：[1]中国石油大学(北京)中国石油天然气集团公司催化重点实验室,北京102249

出　　处：《过程工程学报》2006年第3期352-356,共5页The Chinese Journal of Process Engineering

基　　金：中国石油化工股份有限公司科技开发资助项目(编号:300023)

摘　　要：气液分离器是丙烯腈生产装置的关键设备之一,用于除去气体产品中的酸雾.分离器的出口结构是影响分离效率的关键因素之一.本研究借助通用流体分析软件PHOENICS对气液分离器内流场进行了分析,结果发现,增大液滴向器壁运动机会和减弱二次夹带效应均有利于提高分离效率.基于此原则,对气体出口结构进行了优化实验,并提出了最佳的分离器双层套筒出口结构.这种结构与其他几种结构相比除雾效果更佳,不管在低空速还是高空速下都能保持较高的除雾效率,操作弹性较好.工业应用也表明,采用双层套筒出口结构的气液分离器具有较高的除酸雾效果,优于原分离器.The mist separator is a key apparatus in the acrylonitrile producing process, which is used to remove sulfuric acid mist from the gas product. High separation efficiency is necessitated to avoid the blockage and corrosion of the downstream facilities. The structure of the exit of the separator is one of the most important factors for increasing the separation efficiency. In the present investigation, 3-D gas flow field of the mist swirl separator was simulated using general CFD code PHOENICS. It was found that the separation efficiency of the mist separator could be improved by increasing the opportunity for liquid droplets to move towards the wall, as well as by decreasing the re-entrainment. The exit structure of mist swirl separator was then optimized experimentally according to the above CFD simulation findings. A new type of exit, double-deck sleeve, was developed and its structure was optimized. The experimental results showed that this structure had higher separation efficiency than other structures. High separation efficiency could be obtained at both low and high gas velocities, indicating better operating flexibility. The industrial application showed that the mist swirl separator with the optimized exit structure had higher separation efficiency than that of the original design.

关 键 词：气液分离器 出口结构 分离效率 压降 

分 类 号：TQ028.4[化学工程]