多场耦合作用脱除PM2.5的数值模拟与实验研究

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英文篇名：Simulation and Experimental Study on Removal PM2.5 by Multifield Coupling 作者：杨晨鹏 ; 朱家骅 ; 杨海涛 ; 陈倬 ; 段旬 英文作者：Yang Chenpeng;Zhu Jiahua;Yang Haitao;Chen Zhuo;Duan Xun;School of Chemical Engineering,Sichuan university; 关键词：PM2.5 ; 热泳 ; 扩散泳 ; 数值模拟 英文关键词：PM2.5;;thermophoresis;;diffusiophoresis;;numerical simulation 中文刊名：山东化工 英文刊名：Shandong Chemical Industry 机构：四川大学化学工程学院; 出版日期：2019-07-08 出版单位：山东化工 年：2019 期：13 基金：国家自然科学基金项目(21276161) 语种：中文; 页：212-214 页数：3 CN：37-1212/TQ ISSN：1008-021X 分类号：X701

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。
        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.

引文

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