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Formation and emission characteristic of PM10 at the coal-fired utility boiler

Sui, J-C, Xu, M-H, Qiu, J-H, Guo, X., Liu, X-W and Gao, X-PORCID: 0000-0003-2491-8169 (2006) Formation and emission characteristic of PM10 at the coal-fired utility boiler. Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics, 27 (2). pp. 335-338.


By using low pressure impactor, fly ash were sampled at the inlet and outlet of venture scrubber and ESP in a 50 MW and 100 MW utility boiler. The formation mechanism, emission and elemental partition characteristics of fly ash were investigated. The results indicate that the ash smaller than 0.377 μm are formed via nucleation of vaporized ash components, the elements Si, Al and Ca have a lower concentration in submicron mode (the fraction is about 1%), the elements Na, Mg, S, Cu, Pb, and Zn generally show 10% to 20% mass less than 0.377 μm, and about 3% to 8% of the elements Fe, Cr and Mn appears in submicron mode. A similar bimodal distribution of PM10 was obtained in the boilers studied, the small and large mode is formed at 0.1 μm and 4.0 μm, respectively. Venture scrubber and ESP have different collection efficiency for different size particles, which results in different particles distribution characteristic in the entrance and exit of venture scrubber and ESP.

Item Type: Journal Article
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