【摘要】 气液间传热传质推动力是PM2.5脱除的关键因素。基于欧拉-拉格朗日模型,考虑热泳力、扩散泳力影响,对流场、温度场和浓度场耦合作用下液膜捕集颗粒过程进行模拟。模拟结果表明:水蒸气浓度差对PM2.5脱除作用明显,当颗粒粒径d_p=1μm时,在水温20℃,气体入口温度60℃,气体入口相对湿度由0.575提高到0.757时,20排液膜柱阵列颗粒脱除总效率提高了35.1%。最后通过含尘气体横掠液膜柱阵列除尘实验验证了模拟结果的准确性。更多还原

【Abstract】 The driving force of gas-liquid heat and mass transfer is the key factor of PM2.5 removal. Based on the Euler-Lagrangian model,the particle collection process of the liquid film was simulated under the coupled action of the flow field,temperature field and concentration field,considering the influence of the thermal and diffusion forces. The simulation results show that the difference of vapor concentration for PM2.5 removal is obvious,when d_p = 1 μm,t_g= 60 ℃,t_w= 20 ℃,gas inlet relative humidity increased from 0.575 to 0.757,20 liquid film column array particle removal efficiency increased by 35.1%. Finally,the accuracy of the simulation results is verified by the dedusting experiment of the liquid film column array with dust-bearing gas.更多还原