Particle size effect on the filtration drag of fly ash from a coal power plant |
| |
Authors: | Joo-Hong Choi Soon-Jong Ha Young-Chul Bak Young-Ok Park |
| |
Affiliation: | (1) Department of Chemical Engineering and ERI, Gyeongsang National University, 660-701 Jinju, Korea;(2) Particle Technology Research Center, Korea Institute of Energy Research, 305-343 Daejeon, Korea |
| |
Abstract: | In order to investigate the filtration properties of fly ash from a conventional coal power plant, the filtration drag across the dust cake over an absolute fiberglass filter element was measured. A fluidized bed column was utilized to obtain a well characterized particle stream. The cake resistance coefficient was analyzed by the equation proposed by Endo et al. [1998] in order to observe the effect of particle size and polydispersity. The filtration drag was measured for three kinds of particle stream having the geometric mean particle size of 3.15, 6.07, and 7.83 μm and the geometric standard deviation less than 1.44 in the practical operation conditions for the field applications of face velocity of 0.03–0.06 m/s and area dust load up to 0.2 kg/m2. A dust cake of smaller particle size showed larger pressure drop even though the porosity was higher and presented high compressibility according to the face velocity. The particle polydispersity was also a dominant factor affecting the compressibility of the dust cake. |
| |
Keywords: | Gas Filtration Particle Size Effect Fly Ash Compressibility Polydisperse Particle |
本文献已被 SpringerLink 等数据库收录! |