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Tentative modelling of spray‐dry scrubbing of SO 2
Author(s) -
Karlsson Hans T.,
Klingspor Jonas
Publication year - 1987
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270100114
Subject(s) - data scrubbing , slurry , lime , flue gas , wet scrubber , spray drying , waste management , limiting , diffusion , chemistry , volumetric flow rate , dissolution , environmental science , pulp and paper industry , process engineering , environmental engineering , materials science , engineering , chromatography , metallurgy , thermodynamics , mechanical engineering , physics
A 0.5 MW spray‐dry scrubbing FGD pilot plant was used in the study of spray dryer performance over a wide range of operating conditions. Experimental findings were compared with a spray dryer model. During operation with large excesses of lime, the SO 2 absorption was limited by gas phase diffusion. At operation with a shortage of lime, the rate limiting step was the dissolution rate of lime. In addition, the flow regime in a spray dryer can be best described as well mixed. The SO 2 level in the flue gas was found to exert no direct effect on the efficiency of SO 2 removal. The observed effects are attributed solely to the changes in the drying process, due to the inter‐dependence of slurry composition and SO 2 concentration.
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