Abstract
Fabric filters are involved in most semi-dry flue gas desulfurization process and represent ability of SO 2 removal. SO 2 removal efficiency in fabric filter after a semi-dry scrubber is investigated. Experimental results showed that SO 2 inlet concentration has little effect on SO 2 removal efficiency, SO 2 removal efficiency increases as flue gas inlet temperature increases and relative humidity affects SO 2 removal efficiency significantly. The kinetic model based on shrinking core theory has been presented. It is found that, in the beginning, when calcium hydroxide conversion ratio is less than 0.3, SO 2 removal process is mainly controlled by chemical reaction (Model-2); and when calcium hydroxide conversion ratio is greater than 0.3, SO 2 diffusion through product layer is rate limiting (Model-3). The experimental results in fabric filter are successfully correlated by Model-3.
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