半干半湿法烟气脱硫塔流场分析

Numerical Analysis of Semi-Dry Flue Gas Desulphurization

利用计算流体力学的方法对半干半湿法烟气脱硫塔内部流场进行研究,通过对塔体内部设备的优化,增加脱硫剂与SO2接触的几率,提高脱硫塔反应效率。在分析脱硫塔内多相流体的流动的基础上,建立k-ε湍流方程模型,分析了塔体内部对流场以及与脱硫效率的影响,研究结果表明,脱硫塔的内部结构对于流场分布起决定性作用,烟气分布器有助于控制脱硫化学反应,对进一步提高半干半湿法烟气脱硫效率非常重要。

Flow field of semi-dry flue gas desulphurization （FGD） reactor is depicted by means of computational fluid dynamics （CFD）. Through optimizing inner part of the reactor and increasing the reacting rate between SO2 and desulphurization agents, SO2 removal efficiency is improved. Based upon multi-phase flow pattern of the reactor, basic theories of k-ε equation and particle trajectory model are established, and the influence of inner structure of the reactor tower on the fluid flow and SO2 removal efficiency analyzed. The results obtained here can indicate that reactor structure can help flue gas and flue gas distribution can control reaction and better removal efficiecy,