基于多孔介质模型的SCR烟气脱硝反应器流场的数值模拟

Numerical Simulation of SCR Flue Gas Denitrification Reactor Flow Field Based on the Porous Media Model

本文通过对SCR——选择性催化还原法脱硝技术原理的介绍,结合多孔介质模型的模拟计算理论,提出对于模拟蜂窝形状的SCR催化剂床层,因其蜂窝形状结构、边界条件设置及网格划分过于复杂,可以采用多孔介质模型进行数值模拟。在此基础上,利用工程仿真实例,指出了可以采用CFD模拟软件对SCR反应器导流、整流部件进行优化设计,其优化过程具有良好的快速性,优化结果具有较好的实用性,对火电厂脱硝系统导流结构装置的设计具有现实指导意义。

Based on the introduction of the SCR（ Selective Catalytic Reduction） denitration technology principles and combined with the theory of porous medium simulation model,it is indicated that the model can be adopted to simulate the SCR catalyst bed which has complex structure resulting in setting boundary conditions and partitioning grid difficultly. Meanwhile,through a simulative example shown in the paper,it is pointed out that the CFD simulation software can be used for the rapid optimization design of the SCR reactor and rectifier units,which is practicable to guide the design of denitrification system in the thermal power plant.