Agglomeration rate and action forces between atomized particles of agglomerator and inhaled-particles from coal combustion

Article type: Research Article

Authors: WEI, Feng | ZHANG, Jun-ying | ZHENG, Chu-guang

Affiliations: National Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China

Note: [] Corresponding author. E-mail: jyzhang@mail.host.edu.cn

Abstract: In order to remove efficiently haled-particles emissions from coal combustions, a new way was used to put forward the process of agglomeration and the atomization was produced by the nozzle and then sprayed into the flue before precipitation devices of power station boiler in order to make inhaled-particles agglomerate into bigger particles, which can be easily removed but not change existing running conditions of boiler. According to this idea, a model is set up to study agglomeration rate and effect forces between fly ash inhaled-particles and atomized agglomerator particles. The developed agglomeration rate was expressed by relative particle number decreasing speed per unit volume. The result showed that viscosity force and flow resistance force give main influences on agglomeration effect of inhaled-particles, while springiness force and gravity have little effect on agglomeration effect of theirs. Factors influencing the agglomeration rate and effect forces are studied, including agglomerator concentration, agglomerator flux and agglomerator density, atomized-particles diameters and inhaled-particles diameter and so on.

Keywords: inhaled particles, agglomerator, effect forces, agglomeration rate

Journal: Journal of Environmental Sciences, vol. 17, no. 2, pp. 335-339, 2005