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Removal of SO2 and other harmful matter from flue gas is effected by scrubbing with a liquor contg. ca(OH)2 and opt. CaO, sepg. the insol. Ca cpds. and recycling the liquor, after adding Ca(OH)2 and/or CaO if necessary. The improvements are that SO2 and other harmful matter are removed from pt. of t...

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Bibliographic Details
Main Authors IGELBUESCHER H, HOELTER H, DEWERT H, GRESCH H
Format Patent
LanguageDanish
Published 25.11.1981
Edition3
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
REFRACTORIES
SEPARATION
SLAG
TRANSPORTING
TREATMENT OF NATURAL STONE
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Summary:Removal of SO2 and other harmful matter from flue gas is effected by scrubbing with a liquor contg. ca(OH)2 and opt. CaO, sepg. the insol. Ca cpds. and recycling the liquor, after adding Ca(OH)2 and/or CaO if necessary. The improvements are that SO2 and other harmful matter are removed from pt. of the flue gas using powdered CaO and/or Ca(OH)2 as sorbent and both gas purified gas fractions are combined before discharge to the atmos., whilst (pt. of) the sorbent used for dry purificn. is added to the wash liquor used in wet purificn. Pref. the flue gas fractions are purified before entering a chimney. The dry sorbent is circulated and fresh sorbent is added. Spent sorbent is removed and crushed and pref. slaked before adding to the wash liquor circulation. The spent sorbent is introduced into the furnace. The combined gas stream has a dew point above that of corrosive matter still remaining in the flue gas, preventing damage to the discharge channels and chimney and avoiding the need to heat the purified flue gas from the wet purificn. stage.
Bibliography:Application Number: DK19810002271