Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Patent
1988-12-08
1990-04-10
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
423244, B01J 800, C01B 2100, C01B 1700
Patent
active
049159208
ABSTRACT:
A dry method is provided for purifying a flue gas containing SO.sub.x, NO.sub.x, steam and oxygen and includes the steps of injecting a fine powder of limestone into a coal-fired boiler furnace for desulfurization, collecting spent fine powder discharged from the coal fired boiler furnace, treating the spent fine powder with water and steam to prepare porous compound sorbent particles, injecting the compound sorbent powder into the flue gas of a temperature of 75.degree. to 220.degree. to disperse the same, and separating the dispersed compound sorbent powder from the flue gas upon desulfurization reaction thereof with the flue gas, by dust collection means.
REFERENCES:
patent: 4324770 (1982-04-01), Bakkr
patent: 4571330 (1986-02-01), Krigmont et al.
patent: 4710365 (1987-12-01), Gebhard et al.
patent: 4726940 (1988-02-01), Kobayashi
Report of 1986 Symposium Sponsored by EPA and EPRI; "Development and Pilot Plant Evaluation of Silica-enhanced Lime Sorbents for Dry Flue Gas Desulfurization", by W. Jozewicz et al.
Thermal and Nuclear Power Engineering Society, Hokkaido Branch Symposium, Mar. 19, 1986.
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