轴向固定床反应器内压降的数值模拟与分析  

Numerical Simulation and Analysis of Pressure Drop in Axial Packed Bed Reactor

作　　者：魏刚[1] 王华[2] 魏永刚[2] 李孔斋[2] 王仕博[2] 张健[1] 

机构地区：[1]昆明理工大学化学工程学院,昆明650093 [2]昆明理工大学冶金与能源工程学院,昆明650093

出　　处：《材料导报》2010年第10期79-82,共4页Materials Reports

基　　金：国家自然科学基金资助项目(50574046;50774038);云南省自然科学基金资助项目(2008E030M)

摘　　要：固定床反应器的压降变化对化学反应效果影响较大,而以实验为主的研究方法无法实时和形象地表达固定床内压降的变化规律。在CSP概念的基础上,以不同管径比为参数建立了轴向固定床反应器的物理模型;利用计算流体动力学软件FLUENT对空隙率ψ=0.48、0.63和0.69等3种不同的催化剂排布方式进行了数值模拟,结果表明,ψ=0.48时反应器内压降最大,而ψ=0.63、0.69时反应器内出现多个回流区域,其耦合结果使整个反应器内的压降在ψ=0.69时最小。分析认为,对于不同类型的化学反应,应采用不同的催化剂排布方式才能达到最佳的反应效果。The changes of pressure drop in packed bed reactor have significant influence on chemical reactions, and the research methods which is based on the experiment can not express the variation of pressure drop in packed bed reactor in real time and vividly. On the basis of CSP conception, the physical model of packed bed reactor is established with the different channel-to-particle-diameter ratio as parameter. The three different catalyst-arranged methods which is porosity ψ= 0. 48, 0. 63 and 0. 69 are simulated by the computational fluid dynamics software FLUENT. The results show that there is maximum pressure drop inside the reactor when ψ=0. 48, and some reflux zones emerge when ψ=0. 63 and 0. 69. The couple results of reflux zones make the pressure drop in packed bed reactor minimum at ψ= 0. 69. At last, the conclusion can be obtained that different catalyst-arranged method should be chosen for different types of chemical reactions so as to achieve the best result of reaction.

关 键 词：固定床反应器 压降 FLUENT 数值模拟 

分 类 号：TQ015[化学工程]