湿法烟气脱硫带钩波纹板除雾器结构优化数值模拟

Numerical Simulation on Wave-plate Demister With Hamulus in Wet Flue Gas Desulfurization

利用流体动力学计算方法,对湿法烟气脱硫系统中带钩波纹板型除雾器内气液两相流流场进行数值模拟。通过改变除雾叶片的各结构参数进行多工况模拟,分析并得到了除雾叶片结构参数的变动对其在不同雾滴直径条件下除雾效率和压力损失的影响规律。研究结果表明,叶片间距、叶片转折角度、钩片直段长度、钩片圆弧段转弯半径及钩片圆弧段转弯角度5组参数对除雾器工作性能的影响较为显著,并由此进一步提出了高效的叶片结构参数组合方式。

The computational fluid dynamics （CFD） method was used to simulate numerically the two phase flow of gas and liquid in wave-plate demister with hamulus in wet flue gas desulfurization （WFGD） system. From changing a series of the structural parameters of the wave-plate, the calculation results were obtained, which indicate the influence rules of these parameters on the demisting efficiency and pressure drop under various droplet diameters of the demister. It could be concluded that the most important structural parameters include plate-distance, plate-angles, hamulus-length, hamulus-radiuses and hamulus-angles. Also an efficient combination of parameters on structure of the demister is suggested in this article.