Effect of initial droplet size distribution on sulfur removal efficiency in FGD/SDA View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1999-05

AUTHORS

Eui-Kyung Oh, Gi-Hune Jung, Sun-Geon Kim, Hyung-Keun Lee, In-Won Kim

ABSTRACT

Dry scrubbing with lime slurry in a spray dryer [spray dryer absorber (SDA)] has been an important technology for flue gas desulfurization (FGD). Mathematical models based on the heat and mass balances are used to predict SO2 removal in the SDA as a function of initial size distribution of slurry droplets. Since the existence of moisture in the droplets appreciably enhances the SO2 removal, its removal efficiency depends on the rate of drying as well as that of SO2 removal itself, both depending on droplet diameter. With the increase in the geometric standard deviation (GSD) of the initial droplet size distribution, the efficiency of SO2 removal first increases and then decreases, showing a maximum at a certain value of GSD. This trend is altered by the sorbent content of the droplets, expressed as stoichiometric ratio (SR). The decrease in SR makes the maximum move to higher GSD and reduces the variation in the efficiency with respect to GSD. For SR<0.73, a minimum efficiency also appears, ahead of the maximum. The results are well explained by the specific rates of both drying and SO2 removal of the droplets. More... »

PAGES

292-297

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02707115

DOI

http://dx.doi.org/10.1007/bf02707115

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1044325403


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