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Removal of SO 2 in Semi‐Dry Flue Gas Desulfurization Process with a Powder‐Particle Spouted Bed
Author(s) -
Nakazato Tsutomu,
Liu Yunyi,
Kato Kunio
Publication year - 2004
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450820114
Subject(s) - flue gas desulfurization , sorbent , slurry , lime , inert , particle size , chemical engineering , particle (ecology) , saturation (graph theory) , flue gas , materials science , waste management , chemistry , metallurgy , adsorption , composite material , organic chemistry , engineering , oceanography , mathematics , combinatorics , geology
Semi‐dry flue gas desulfurization was investigated with several kinds of SO 2 sorbents, such as slaked lime, limestone, Mg(OH) 2 and concrete pile sludge, in a powder‐particle spouted bed. Slurry droplets including sorbent fine particles were fed to a spouted bed of coarse inert particles spouted with hot gas containing SO 2 . SO 2 removal efficiency was strongly affected by the approach to saturation temperature, Ca/S molar ratio and particle size of sorbent. Slaked lime showed the highest desulfurization efficiency. In this process, despite very short gas residence time, more than 90% SO 2 removal was easily achieved by choosing appropriate conditions.