徐挺¹,魏文韫¹,孙白宇¹,杨雅琪¹,刘凌岭¹,余徽¹,ThomasLaminger²,WilhelmHoeflinger²

• 1:四川大学 化学工程学院，四川 成都 610065
• 2:维也纳技术大学 化学工程研究所，奥地利 维也纳1060

摘要(Abstract)：

亚微米级颗粒是化学工业尾气排放物的重要组成，其脱除效率是影响排放指标进一步提高的关键。基于颗粒捕获机理，建立了气液交叉流系统脱除效率的理论模型，并对该系统脱除亚微米级颗粒的特性进行了理论分析和实验研究。实验结果表明，低气速、高液柱群比表面积、高气液相温差有利于提升系统的脱除效率。粒径0.05~0.6 μm，脱除效率随粒径的增大呈现先降低后增加的趋势，与理论值趋势一致，表明系统中同时存在惯性碰撞、拦截、布朗运动等三种脱除机理。相对于理论值，实验脱除率整体偏大，表明颗粒在高湿环境中易凝并，有助于颗粒在碰撞和拦截作用下的脱除。由实验数据外推，研究条件下，液柱单元排数为1300时，亚微米级颗粒质量脱除效率预计可达90%。

关键词(KeyWords)： 气液交叉流系统;亚微米级颗粒物;脱除效率;理论模型

Abstract:

Keywords:

基金项目(Foundation): 国家国际科技合作专项资助（2014DFG92250）。

作者(Author): 徐挺¹,魏文韫¹,孙白宇¹,杨雅琪¹,刘凌岭¹,余徽¹,ThomasLaminger²,WilhelmHoeflinger²

DOI: 10.3969/j.issn.1003-9015.2017.04.029

参考文献(References)：

• [1] The emission standards of sulfuric acid industrial (硫酸工业污染物排放标准):GB/T 26132-2010[S]. Beijing (北京):Standards Press of China (中国标准出版社), 2010.
  [2] LI Yang (李洋). Study on thermophoretic deposition mechanism of sub-micron particle in the sources of haze (雾霾排放源亚微米颗粒物热泳沉积机理研究)[D]. Beijing (北京):North China Electric Power University (华北电力大学), 2012.
  [3] DONG Xue-ling (董雪玲). Impact of inhalable particles in atmosphere inenvironment and human health (大气可吸入颗粒物对环境和人体健康的危害)[J]. Resources & Industries (资源·产业), 2004, 6(5):52-55.
  [4] Ostro B, Chestnut L, Vichitvadakan N, et al. The impact of particulate matter on daily mortality in Bangkok, Thailand[J]. Journal of the Air & Waste Management Association, 1999, 49(9):100-107.
  [5] Pryor S C, Simpson R, Guise B L, et al. Visibility and aerosol composition in the Fraser valley during reveal[J]. Journal of the Air & Waste Management Association, 1997, 47(2):147-156.
  [6] BAO Jing-jing (鲍静静), YIN Hua-bin (印华斌), YANG Lin-jun (杨林军), et al. Formation characteristics of aerosols in wet ammonia-based desulphurization process (湿式氨法烟气脱硫中气溶胶的形成特性研究)[J]. Journal of Chemical Engineering of Chinese Universities (高校化学工程学报), 2010, 24(2):325-330.
  [7] HU Xiao-tu (胡小吐). The industrial application of WESP in ammonia FGD (氨法烟气脱硫湿式电除尘技术的工业应用)[J]. Environmental Engineering (环境工程), 2015, 33(2):80-83.
  [8] LIU Yuan (刘媛), YAN Jun (闫骏), JING Peng (井鹏), et al. Research and application of wet electrostatic precipitator[J] (湿式静电除尘技术研究及应用)[J]. Environmental Science & Technology (环境科学与技术), 2014, 37(6):83-88.
  [9] MO Hua (莫华), ZHU Fa-hua (朱法华), WANG Sheng (王圣), et al. Application of WESP in coal-fired power plants and its effect on emission reduction of PM2.5(湿式电除尘器在燃煤电厂的应用及其对PM2.5的减排作用)[J]. Electric Power (中国电力), 2013, 46(11):62-65.
  [10] ZHU Jia-hua (朱家骅), XIA Su-lan (夏素兰), WEI Wen-yun (魏文韫), et al. PM2.5 removal - advances in wet collection technologies and a novel approach through temperature swing multi-phase flow (湿法除尘技术进展及变温多相流脱除PM2.5的新方法)[J]. CIESC Journal (化工学报), 2012, 64(1):155-164.
  [11] CHEN Zhi-liang (陈治良), WEI Wen-yun (魏文韫), ZHU Jia-hua (朱家骅), et al. Mechanism of micro-particle motion across falling liquid clinder for PM2.5 separation (I). Trajectory of particle motion towards surface and separation radius (横掠液柱流的微粒运动机理及PM 2.5捕获(I)附面运动轨迹与分离半径)[J]. CIESC Journal (化工学报), 2012, 63(7):2001-2009.
  [12] CHEN Zhi-liang (陈治良), WEI Wen-yun (魏文韫), ZHU Jia-hua (朱家骅), et al. Mechanism of micro-particle motion across falling liquid cylinder for PM2.5 separation (Ⅱ). Efficiency of PM2.5 separation from heavy-duty diesel exhausts (横掠液柱流的微粒运动机理及PM2.5捕获(Ⅱ)重型柴油机尾气PM2.5捕获效率)[J]. CIESC Journal(化工学报), 2012, 63(7):2010-2016.
  [13] Liu L, Wei W, Yu H, et al. Experimental study on particle removal with gas-liquid cross-flow array system[J]. Separation and Purification Technology, 2017, 174:194-202.
  [14] JIANG Ye-zheng (姜业正), WU Hao (吴昊), LUO Fei (雒飞), et al. Performance study on fine particle removal from wet desulfurized flue gas by adding humid air (添加湿空气对湿法脱硫净烟气中细颗粒物脱除性能)[J]. Journal of Southeast University (东南大学学报), 2016, 46(1):81-86.
  [15] LI Bing (李兵), WEI Wen-yun (魏文韫), LIU Ling-ling (刘凌岭), et al.Operating condition study on online measurement of wet aerosol particle concentration (高湿气溶胶颗粒浓度在线检测操作条件)[J]. Journal of Chemical Engineering of Chinese Universities (高校化学工程学报), 2016, 30(6):1427-1435.
  [16] Shen S, Jaques P A, Zhu Y, et al. Evaluation of the SMPS-APS system as a continuous monitor for measuring PM2.5, PM10 and coarse (PM2.5~10) concentrations[J]. Atmospheric Environment, 2002, 36(24):3939-3950.
  [17] Suneja S K, Lee C H. Aerosol filtration by fibrous filters at intermediate Reynolds numbers (≤ 100)[J]. Atmospheric Environment, 1974, 8(11):1081-1094.
  [18] Song C B, Park H S. Analytic solutions for filtration of polydisperse aerosols in fibrous filter[J]. Powder Technology, 2006, 170(2):64-70.
  [19] Dunn P F, Renken K J. Impaction of solid aerosol particles on fine wires[J]. Aerosol Science and Technology, 1987, 7(1):97-107.
  [20] Hakobyan N A. Introduction to basics of submicron aerosol particles filtration theory via ultrafine fiber media[J]. Armenian Journal of Physics, 2015, 8(3):140-151.
  [21] Wong J B, Ranz W E, Johnstone H F. Inertial impaction of aerosol particles on cylinders[J]. Journal of Applied Physics, 1955, 26(2):244-249.
  [22] YANG Ling (杨林), FU Hai-ming (付海明), LI Jie (李杰), et al. Rationality analysis of the empirical model of single fiber filtration mechanism (单纤维过滤机理经验模型合理性分析)[J]. Building Energy & Environment (建筑热能通风空调), 2014, 33(1):52-55.
  [23] Stairmand C J. Dust collection by impingement and diffusion[J]. Transactions Institute of Chemical Engineers, 1950(28):130-139.
  [24] FU Hai-ming (付海明), SHEN Heng-gen (沈恒根). Development of theory about filtration of fibrous filters (纤维过滤器过滤理论的研究进展)[J]. China Powder Science and Technology (中国粉体技术), 2003, 9(1):41-46.
  [25] FAN Feng-xian (凡凤仙), YANG Lin-jun (杨林军), YUAN Zhu-lin (袁竹林), et al. Removal and condensation growth of inhalable particles in spray scrubber (喷淋塔内可吸入颗粒物的脱除与凝结增长特性)[J]. CIESC Journal (化工学报), 2010, 61(10):2708-2713.
  [26] Paul A B, Klaus W. Aerosol measurement principles techniques, techniques,and applications (气溶胶测量:原理、技术及应用)[M]. Bai Zhi-Peng (白志鹏), et al. trans. 2nd ed. Beijing (北京):Chemical industry press (化学工业出版社), 2007.
  [27] Tyree C, Allen J. Diffusional particle loss upstream of isokineticsampling inlets[J]. Aerosol Science and Technology, 2004, 38(10):1019-1026.
  [28] He C H, Ahmadi G. Particle deposition with thermophoresis in laminar and turbulent duct flows[J]. Aerosol Science and Technology, 1998, 29(6):525-546.
  [29] Sioutas C. Evaluation of the measurement performance of the scanning mobility particle sizer and aerodynamic particle sizer[J]. Aerosol Science and Technology, 1999, 30(1):84-92.
  [30] Wang C S, Friedlander S K. Determination of surface area and volume of nanoparticle aggregates deposited in the human respiratory tract using DMA data[J]. Journal of Aerosol Science, 2007, 38(9):980-987.