浆态床反应器气体分布器应用模拟分析  

Application Simulation and Analysis of Gas Distributor in Slurry-Bed Reactor

作　　者：郭中山 温润娟 朱传琪 GUO Zhongshan;WEN Runjuan;ZHU Chuanqi(Chemical Engineering Department,Tsinghua University,Beijing 100084,China;CHN ENERGY Ningxia Coal Industry Co.,Ltd.,Ningxia Yinchuan 750411,China)

机构地区：[1]清华大学化学工程系,北京100084 [2]国家能源集团宁夏煤业公司,宁夏银川750000

出　　处：《辽宁化工》2025年第4期609-615,共7页Liaoning Chemical Industry

摘　　要：针对浆态床反应器底部气体分布情况,开展反应器底部气体分布器的流场模拟研究,采用VOF两相流模型模拟浆态床反应器气体分布器的两相流动情况,分析分布器的压降、整体宏观流动和相分布情况。结果表明:在分布器的中心和反应器近壁区存在气含率低的区域,容易出现固相沉积。反应器中心分布器排布使得气体互相干涉,容易形成团状气泡,导致气含率下降。靠近反应器壁面区域液相返混速度较小,易造成固相的沉积。因此,在反应器中心相邻环管分布器的排布上采取错位排布,减少相互干涉效应。反应器近壁区域采取轴向错位排布,加大液相循环扰流。Based on the gas distribution at the bottom of the slurry-bed reactor,simulation study of the flow field of the gas distributor at the bottom of the reactor was carried out.VOF model was used to simulate the two-phase flow of gas distributor in slurry bed reactor.The pressure drop,macroscopic flow and phase distribution of the distributor were analyzed.The results showed that the gas volume fraction in the center of distributor and near the wall of reactor was low,which led to solid phase deposition easily.The central distributor arrangement of the reactor made the gas interfere with each other,easy to form a cluster bubble,resulting in a decrease in gas volume fraction.The back-mixing velocity of liquid phase near the reactor wall was small,which was easy to cause the deposition of solid phase.Therefore,the dislocation arrangement was adopted on the adjacent loop distributor in the reactor center to reduce the mutual interference effect.Axial dislocation arrangement was adopted in the near wall region of the reactor to increase the liquid circulation disturbance.

关 键 词：气体分布器 流场分析 数值模拟 

分 类 号：TQ051[化学工程]