响应面法优化袋式除尘器脉冲清灰性能

基于计算流体动力学的方法采用三维、可压缩、非稳态流动数学模型对袋式除尘器脉冲清灰过程进行了数值模拟,得到了滤袋内外压差,并与文献实验值进行了比较,验证了仿真模型的可靠性。基于响应面法研究了喷吹压力、喷吹高度、滤袋直径和滤袋长度对脉冲清灰性能的影响,得到这4个影响因子的二次多项式预测模型,并进行优化。结果表明,喷吹压力为0.3 MPa,喷吹高度为0.2 m,滤袋直径为0.16 m,滤袋长度为6 m时,内外压差峰值最优,优化结果与仿真模拟结果相差小于3%。研究结果为袋式除尘器脉冲清灰系统的设计与优化提供了重要参考。

Optimization of performance of pulse-jet cleaning of fabric filters using response surface methodology

Pulse-jet cleaning process simulation of fabric filter was conducted based on computational fluid dynamics (CFD) method,using a three-dimensional,compressible and unsteady flow mathematical model.The differential pressure on the filter bag was reported and compared with the experimental values, which verified the reliability of the simulated model.The effects of the jet pressure, jet height, filter bag diameter, filter bag length on the dust cleaning performance were studied based on the response surface methodology (RSM).A quadratic polynomial prediction model of the above-mentioned impact factors was developed and optimized.The results show that optimum differential pressure peak value was obtained when jet pressure was 0.3MPa, jet height was 0.2 m, filter bag diameter was 0.16 m and filter bag length was 6 m.The overall uncertainty regarding the optimization and simulation results was lower than 3%.This investigation offers substantial insight for the design and the optimization of pulse-jet cleaning of fabric filters.