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Removal of fine particles in wet flue gas desulfurization system by heterogeneous condensation / Linjun Yang in Chemical engineering journal, Vol. 156 N° 1 (Janvier 2010) 

Public ISBD [article]  in Chemical engineering journal > Vol. 156 N° 1 (Janvier 2010) . - pp. 25-32 Titre : Removal of fine particles in wet flue gas desulfurization system by heterogeneous condensation Type de document : texte imprimé Auteurs : Linjun Yang, Auteur ; Jingjing Bao, Auteur ; Jinpei Yan, Auteur Année de publication : 2010 Article en page(s) : pp. 25-32 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Wet  flue  gas  desulfurization  Heterogeneous  condensation  Fine  particles  Removal Index. décimale : 660 Résumé : A novel process to remove fine particles with high efficiency by heterogeneous condensation in a wet flue gas desulfurization (WFGD) system is presented. A supersaturated vapor phase, necessary for condensational growth of fine particles, was achieved in the SO2 absorption zone and at the top of the wet FGD scrubber by adding steam in the gas inlet and above the scrubbing liquid inlet of the scrubber, respectively. The condensational grown droplets were then removed by the scrubbing liquid and a high-efficiency demister. The results show that the effectiveness of the WFGD system for removal of fine particles is related to the SO2 absorbent employed. When using CaCO3 and NH3·H2O to remove SO2 from flue gas, the fine particle removal efficiencies are lower than those for Na2CO3 and water, and the morphology and elemental composition of fine particles are changed. This effect can be attributed to the formation of aerosol particles in the limestone and ammonia-based FGD processes. The performance of the WFGD system for removal of fine particles can be significantly improved for both steam addition cases, for which the removal efficiency increases with increasing amount of added steam. A high liquid to gas ratio is beneficial for efficient removal of fine particles by heterogeneous condensation of water vapor. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X9NVBP-1&_user=6 [...] [article] Removal of fine particles in wet flue gas desulfurization system by heterogeneous condensation [texte imprimé] / Linjun Yang, Auteur ; Jingjing Bao, Auteur ; Jinpei Yan, Auteur . - 2010 . - pp. 25-32. Génie Chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 156 N° 1 (Janvier 2010) . - pp. 25-32 Mots-clés : Wet  flue  gas  desulfurization  Heterogeneous  condensation  Fine  particles  Removal Index. décimale : 660 Résumé : A novel process to remove fine particles with high efficiency by heterogeneous condensation in a wet flue gas desulfurization (WFGD) system is presented. A supersaturated vapor phase, necessary for condensational growth of fine particles, was achieved in the SO2 absorption zone and at the top of the wet FGD scrubber by adding steam in the gas inlet and above the scrubbing liquid inlet of the scrubber, respectively. The condensational grown droplets were then removed by the scrubbing liquid and a high-efficiency demister. The results show that the effectiveness of the WFGD system for removal of fine particles is related to the SO2 absorbent employed. When using CaCO3 and NH3·H2O to remove SO2 from flue gas, the fine particle removal efficiencies are lower than those for Na2CO3 and water, and the morphology and elemental composition of fine particles are changed. This effect can be attributed to the formation of aerosol particles in the limestone and ammonia-based FGD processes. The performance of the WFGD system for removal of fine particles can be significantly improved for both steam addition cases, for which the removal efficiency increases with increasing amount of added steam. A high liquid to gas ratio is beneficial for efficient removal of fine particles by heterogeneous condensation of water vapor. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X9NVBP-1&_user=6 [...]