JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2018, Vol. 48 ›› Issue (4): 128-136.doi: 10.6040/j.issn.1672-3961.0.2018.103

Previous Articles    

Tests and comparison of the dehumidification effectiveness of drying techniques involving in atmospheric sampling

ZHAO Yanan, WANG Xinfeng*, LI Rui, CHEN Tianshu, XUE Likun, WANG Wenxing   

  1. Environment Research Institute, Shandong University, Jinan 250100, Shangdong, China
  • Received:2018-03-11 Online:2018-08-20 Published:2018-03-11

Abstract: High humidity and fog water can affect the measurement results of atmospheric pollutants, or even damages the instruments. Therefore, it was necessary to dehumidify the sample air with specific drying techniques when sampling. This study tested and compared the dehumidification effectiveness and the influencing factors of four common drying devices, i.e., cyclone cutter, heating belt, Nafion drying tube, and silicone drying tube. The results showed that the cyclone cutter could effectively remove liquid water and it was suitable trace gases and fine particulate matters. The heating belt quickly reduced the relative humidity of the sample air; however, the relatively humidity exhibited large fluctuation. The average dehumidification efficiency was about 20%~40%. The heating belt was mainly suitable for the thermally stable pollutants. The dehumidification efficiency of Nafion drying tube was usually less than 20%, but it was suitable for all kinds of trace gases and particulate matters. The silica gel drying tube could quickly dry the sample air with stable and high efficiency of about 50% and it was mainly suitable for particulate matters. The use of the above drying techniques would cause a loss of trace gases in certain degree. Among them, the loss caused by heating was highest, about 10%. The loss caused by cyclone cutters and Nafion drying tubes was no more than 10% and even less than 5%. These drying devices had different applicability, advantages, and disadvantages, so it was necessary to take account into the measured component.

Key words: drying technology, dehumidifying device, dehumidification efficiency, loss, atmospheric sampling

CLC Number: 

  • X851
[1] 高继慧,马春元,吴少华,等.烟气中SO2采样测量技术的应用与改进[J].环境工程,2001,19(5):48-49.
[2] GAO Jian, WANG Tao, DING Aijun, et al. Observational study of ozone and carbon monoxide at the summit of mount Tai(1534 m asl)in central-eastern China[J].Atmospheric Environment, 2005, 39(26):4779-4791.
[3] 都小凡,钱仙妹,刘强,等.相对湿度对光声信号的影响研究[J].光学学报,2017,37(2):315-322. DU Xiaofan, QIAN Xianmei, LIU Qiang, et al. Effect of relative humidity on photoacoustic signal[J].Acta Optica Sinica, 2017, 37(2):315-322.
[4] XUE Likun, WANG Tao, ZHANG Jiamin, et al. Source of surface ozone and reactive nitrogen speciation at Mount Waliguan in western China: New insights from the 2006 summer study[J].Journal of Geophysical Research Atmospheres, 2011, 116(D7):529-529.
[5] 戴安(DIONEX).大气颗粒物及部分气态前体物的连续在线观测[J].环境化学,2010, 29(2):1193-1194.
[6] HENNING S, WEINGARTNER E, SCHWIKOWSKI M, et al. Seasonal variation of water-soluble ions of the aerosol at the high-alpine site Jungfraujoch(3580 m asl)[J]. Journal of Geophysical Research, 2003, 108(D1):ACH 8-1-ACH 8-10.
[7] YE Xingnan, CHEN Tianyi, HU Dawei, et al. A multifunctional HTDMA system with a robust temperature control[J].Advances in Atmospheric Sciences, 2009, 26(6):1235-1240.
[8] 黄正旭,高伟,董俊国,等.实时在线单颗粒气溶胶飞行时间质谱仪的研制[J].质谱学报,2010,31(6):331-336. HUANG Zhengxu, GAO Wei, DONG Junguo, et al. Development of real-time single particle aerosol time-of-flight mass spectrometer[J].Journal of Chinese Mass Spectrometry Society, 2010, 31(6):331-336.
[9] 汪淑华,郇延富,冯国栋,等. Nafion干燥器的去溶机理和日常维护[J].分析仪器,2003(1): 23-26. WANG Shuhua, HUAN Yanfu, FENG Guodong, et al. Desolvation mechanism and maintenance of Nafion dryer[J].Analytical Instrumentation, 2003(1): 23-36.
[10] HE Hui, TIE Xuexi, ZHANG Qiang, et al. Analysis of the causes of heavy aerosol pollution in Beijing, China: A case study with the WRF-Chem model[J]. Particuology, 2015, 20(3): 32-40.
[11] QUAN Jiannong, GAO Yang, ZHANG Qiang, et al. Evolution of planetary boundary layer under different weather conditions, and its impact on aerosol concentrations[J]. Particuology, 2013, 11(1):34-40.
[12] ZHANG Hongxing, WANG Xiaoke, FENG Zongwei, et al. Multichannel automated chamber system for continuous monitoring of CO2, exchange between the agro-ecosystem or soil and the atmosphere[J]. Acta Ecologica Sinica, 2007, 27(4):1273-1281.
[13] MURAMATSU K, SASAKI S, CHO Y, et al. Chemical composition of ambient aerosol, ice residues and cloud droplet residues in mixed-phase clouds: single particle analysis during the cloud and aerosol characterization experiment(CLACE 6)[J]. Atmospheric Chemistry & Physics Discussions, 2010, 14(1): 31-36.
[14] GOURIHAR K, MIKHAIL P, ARMIN A, et al. Comparison of experimental and numerical studies of the performance characteristics of a pumped counterflow virtual impactor[J]. Aerosol Science & Technology, 2011, 45(3):382-392.
[15] SELLEGRI K, LAJ P, MARINONI A, et al. Contribution of gaseous and particulate species to droplet solute composition at the Puy de D me, France [J]. Atmospheric Chemistry & Physics, 2003, 3(1):1509-1522.
[16] 高占君, 唐大勇, 纪永艺, 等.加热型环境空气采样总管:CN98251669.X [P]. 1999-12-15.
[17] MICHAEL H, JOHN A, STEPHEN E, et al. Evaporation of ammonium nitrate aerosol in a heated nephelometer: Implications for field measurements[J]. Environmental Science & Technology, 1997, 31(10):2878-2883.
[18] SOFOWOTE U, SU Yushan, BITZOS M M, et al. Improving the correlations of ambient tapered element oscillating microbalance PM2.5 data and SHARP 5030 Federal Equivalent Method in Ontario: a multiple linear regression analysis[J]. Journal of the Air & Waste Management Association, 2014, 64(1):104-114.
[19] ANDERSON T, OGREN J. Determining aerosol radiative properties using the TSI 3563 integrating nephelometer[J]. Aerosol Science & Technology, 1998, 29(1):57-69.
[20] 蒋雄杰,李峰. Nafion干燥器GASS处理系统在“超低排放”CEMS中的工程应用研究[J].分析仪器,2015(3): 26-33. JIANG Xiongjie,LI Feng.Research and application of GASS preconditioning system for “Itra low emission”CEMS in coal fired power plant[J].Analytical Instrumentation, 2015(3):26-33.
[21] 谢志勇.Nafion除湿技术在“超低排放”CEMS中的应用[J].科学与财富, 2016(12): 399.
[22] MEYER M B, PATASHNICK H, AMBS J L, et al. Development of a sample equilibration system for the TEOM continuous PM monitor[J]. Air Repair, 2000, 50(8):1345-1349.
[23] PLEIL J, OLIVER K, MCCLENNY W. Enhanced performance of Nafion dryers in removing water from air samples prior to gas chromatographic analysis[J]. Air Repair, 1987, 37(3): 244-248.
[24] 郭晓霜,李小滢,闫才青,等.利用单颗粒气溶胶质谱仪研究南黄海气溶胶的变化特征[J].北京大学学报,2017,53(6):1042-1052. GUO Xiaoshuang, LI Xiaoying, YAN Caiqing, et al. Changes of marine aerosol properties over the South Yellow Sea using single particle aerosol mass spectrometer[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2017, 53(6):1042-1052.
[25] 蔡琦.超声波加湿器的原理与维修[J].商情,2017(9): 285.
[26] 金义忠,夏黎明.在线分析样气除湿新技术的应用研究[J].分析仪器,2010(6):65-70. JIN Yizhong, XIA Liming. New techniques of sample dehumidifying for on-line gas analysis[J].Analytical Instrumentation, 2010(6): 65-70.
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