Using flue-gas waste-heat to dry sludge is an emerging green technology. The sludge drying process is found to be also effective in removal of particulates from the flue-gas. In this paper, we analyze the removal efficiency of such processes measured in both laboratory setting and real power plant environments to determine the important factors that controlling the removal efficiency. The result shows that, for four types of sludge, the removal rates of PM2.5, PM10, and TSP are in ranges of 18%~42%, 32%~55%, and 39%~62%, respectively. The removal rate of PM2.5 depends on the microstructure and organic matter content of the sludge. It increases with the sludge packing density and moisture content but decreases with the sludge particulate size. Smaller sludge particulate size is believed to be favoring the formation of abundant water drops in flue-gas which in turn adsorb and combine the micro particles into larger particles.
王国栋, 戴之希, 刘嘉伟, 翁焕新. 烟气干化污泥对颗粒物的去除作用及其影响因素[J]. 中国环境科学, 2016, 36(1): 42-49.
WANG Guo-dong, DAI Zhi-xi, LIU Jia-wei, WENG Huan-xin. The effects of sludge drying on removal of particulate matters from flue-gas. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(1): 42-49.
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