Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component
Patent
1988-09-12
1990-03-27
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Sulfur or sulfur containing component
C01B 1700
Patent
active
049119010
ABSTRACT:
A process for treating a flue gas containing sulfur dioxide and fly ash is disclosed in which an aqueous absorbent liquid is sprayed into the glue gas stream, and the resulting gas is fed to a vertical, open-ended pipe to form a jet annular stream, so that portions of the SO.sub.2 and the fly ash contained in the flue gas are transferred to the liquid phase. The jet annular stream is then sparged into the aqueous absorbent held in a well-mixed vessel to form a jet bubbling layer in a shallow, upper region of the aqueous absorbent, so that a greater part of the SO.sub.2 and the fly ash are removed from the gas. Air is introduced into a deep lower region of said aqueous absorbent to provide streams of fine oxygen-containing gas bubbles throughout the whole vessel, so that the absorbed SO.sub.2 and other sulfites are oxidized to form coarse gypsum crystals while COD of the absorbent is reduced.
REFERENCES:
patent: 3520113 (1970-07-01), Stokes
patent: 3615165 (1971-10-01), Clement
patent: 3885929 (1975-05-01), Lyon et al.
patent: 4099925 (1978-07-01), Yanagioka et al.
patent: 4148615 (1979-04-01), Agarwal et al.
Hashimoto Naobumi
Kawamura Kazushige
Komatsubara Yoshiaki
Kumagai Akira
Ogawa Yoshio
Chiyoda Corporation
Heller Gregory A.
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