乙烯氧氯化工业反应器的模型化

Modeling of Industrial Reactor of Ethylene Oxychlorination

针对乙烯氧氯化反应过程所用的挡板流化床反应器的结构和操作特点，建立了一个比较完整和实用的能反映中、高气速下，较大开孔率挡板流化床的气固流动的多釜串联模型，并进行了模型的数学推导和求解。该模型能较好地模拟工业反应器内轴向的气体浓度分布和床层温度分布规律。研究结果表明，在本反应体系中，因乙烯和氧的过量，导致反应过程的后期ＨＣｌ转化率为相间传质控制，强化相间传质效果是保证ＨＣｌ高转化率的有效手段。

Based on the analysis of the behaviour of the baffled fluidized bed(BFB) reactor of ethylene oxychlorination,a mathematical model expressing the gas-solid flow characteristics in the BFB at middle-high gas flow rates was developed on the basis of two-phase theory.This model successfully simulated the axial distribution of the concentrations of reaction components and the reaction temperature in a commercial BFB.The results showed that with large excess of C_2H_4 and O_2 in the feed,the final result of this reaction depends completely on the mass transfer of HCl between the bubble phase.