AAAR 37th Annual Conference October 14 - October 18, 2019 Oregon Convention Center Portland, Oregon, USA
Abstract View
Development of a New Dilution System for Continuous Measurement of Particle Concentration in the Exhaust from a Coal-fired Power Plant
Dongho Shin, Kee-Jung Hong, Hak-Joon Kim, Bangwoo Han, YONG-JIN KIM, Korea Institute of Machinery & Materials
Abstract Number: 850 Working Group: Instrumentation and Methods
Abstract The particle concentrations in the exhausts from coal-fired power plants have received much attention because coal-fired power plants are among the largest sources of particulate matter (PM) emissions in Korea. We developed an ejector-porous tube diluter to suppress particle nucleation and minimize particle loss. To measure fine particles in a stack continuously, clean air was periodically supplied at high pressure in the diluter. The particle concentrations in the exhaust from a coal-fired power plant in Korea were measured and compared with results obtained using an existing commercial diluter which is a porous tube-ejector diluter. Both the commercial diluter and our diluter successfully suppressed the particle nucleation of volatile compositions, which commonly happens at cold dilutions of hot gases. However, the commercial diluter showed significant particle losses in the PM2.5−10 size range, whereas our diluter did not. The diluters developed in this study were installed at two coal-fired power plants to continuously measure the exhaust PM10 and PM2.5 for a long time. Using the optical particle counter (OPC, 1.109, Grimm, Germany) with the diluter developed in this study, we measured the size distributions for mass concentrations at two coal-fired power plants and the measured PM10 were compared with the gravimetric method (EPA M201A) which is a standard method for measuring the PM10. The relative accuracies between our method and the EPA M201A were less than 20%, a suitable value for continuous monitoring PM10 in stacks. This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry, & Energy (MOTIE) of the Republic of Korea (Grant No. 20161110100140).