应用响应曲面法的波纹板除雾器钩片尺寸优化

Optimization of Corrugated Plate Mist Eliminator Hook Dimensions with Response Surface Method

基于计算流体方法,采用二维、不可压缩、非稳态流动模型,对湿法烟气脱硫塔中带钩波纹板除雾器内的气液两相流场进行数值模拟,比较了除雾器性能的模拟值和实验值。利用计算结果,基于响应曲面法并使用Design-Expert软件研究了钩片直段长度(H)、钩片圆弧段转折角度(β)及钩片圆弧段转折半径(r)对除雾器性能的影响,得到了除雾器性能的二次多项式预测模型。研究结果表明,除雾器性能的模拟值与实验值吻合较好,验证了数值计算结果的可靠性;在上述多个影响因素中,H、β、r、H平方项及H和β的交互作用对除雾器性能的影响最为显著;在所研究的尺寸范围内,当H=15.51 mm、β=35.96°、r=25.78 mm时,除雾器性能达到最优。所得结论有助于进一步改善除雾器的结构优化设计。

The computational fluid dynamics （CFD） method and the 2-D incompressible, unsteady flow model are used to conduct a numerical simulation of the gas-liquid two-phase flow field inside a corrugated plate demister with hook. The demister performance simulated values and experimental values are compared. By taking advantage of the numerical calculation result, the effect of the hook-length, hook-angles and hook-radiuses on the demister performance are studied based on the response surface method （RSM） combined with the statistical software Design-Expert, and the quadratic polynomial prediction model of the above three impact factors are also derived. The simulation results show that the demister performance simulation values are consistent with the experimental values, which verifies the reliability of the calculation result. Among the factors mentioned above, hook-length, hook-angles, hook-radiuses, square term of hook-length and the interaction of hook-length and hook-angles have the most significant impacts on the response values. Within the size range, the performance achieves the optimal when H= 10mm,β=39.59°, and r=24 mm. In conclusion, the study results are helpful to further improve the design method of the mist eliminator.