文章基本信息

标题：Dilution Ratio and Particle Loss Performance of a Newly Developed Ejector Porous Tube Diluter Compared to a Commercial Diluter
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作者：Dongho Shin ; Hyunsoo Seo ; Kee-Jung Hong 等
期刊名称：Aerosol and Air Quality Research
印刷版ISSN：1680-8584
出版年度：2020
卷号：20
期号：11
页码：2396-2403
DOI：10.4209/aaqr.2020.03.0117
语种：English
出版社：Chinese Association for Aerosol Research in Taiwan
摘要：In this study, a new ejector-porous tube diluter was developed to accurately in situ measure particulate matter at the source, e.g., emissions at coal-fired power plants, and its dilution ratio and particle loss were compared to those of a commercial model. Whereas commercial models supply air to the porous tube diluter (PRD) using a high-pressure compressor, our device replaces the latter with a ring blower, thereby decreasing the power consumption for the same airflow rate. As a demonstration, particle size volume distributions of fly ash at a coal-fired power plant stack were determined for different dilution ratios. PRD flow rates of 10 and 20 L min–1 for the commercial diluter produced ~2-µm particle volume concentrations of 382 and 572 µm3 cm–3, respectively, from an initial (undiluted) volume concentration of 756 µm3 cm–3. However, PRD flow rates of 10 and 30 L min–1 for the developed device produced ~2-µm particle volume concentrations of 506 and 500 µm3 cm–3, respectively, from an initial volume concentration of 532 µm3 cm–3. These particle loss rates were confirmed through field testing.
关键词：Diluter; Ejector; Porous tube; Particle loss; Turbulence.