Method for pollution emission reduction from glass melting furnaces
AssigneeEdmeston AB
InventorJeffery C. Alexander
Life of this patent
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Abstract
A method for reducing pollution emissions from a glass melting furnace using electrostatic granular bed (EGB) technology. The granules in the EGB filter are themselves formed from an alkaline earth metal material. The granules react with sulfur compounds in the exhaust gas and form a layer of alkaline earth metal sulfates and sulfites in the granules. Simultaneously alkali metal-containing particles are deposited on the granules. The accumulated layers of pollutants are easily removed by mechanical agitation.
Claims8
A method for reducing pollution emission from a glass melting furnace exhaust stream which includes a gaseous sulfur oxide constituent, dust, and alkali metal salt particulates, comprising the steps of:
- (a) electrostatically ionizing dust and alkali metal salt particulates in the exhaust gas stream;
- (b) providing an electrostatic granular bed filter comprising groups, wherein the granules are solid alkaline earth metal material;
- (c) electrically polarizing the granular solid alkaline earth metal material with a high voltage electrode;
- (d) passing the exhaust stream over the granular bed, thereby reacting the granules with the sulfur-containing gases and forming alkaline earth metal sulfates and sulfites on the surfaces of the granules;
- (e) simultaneously depositing dust and alkali metal salt particulates from the exhaust stream onto the granules;
- (f) removing the granular alkaline earth metal material from the bed;
- (g) mechanically agitating the granules removed from the bed in step (f), thereby dislodging collected dust, alkali metal salt particulates and alkaline earth metal sulfates and sulfites from the granules and exposing a fresh surface of alkaline earth metal on the granules;
- (h) separating the granules from the collected dust, alkali metal salt particulates, and alkaline earth metal sulfates and sulfites;
- and
- (I) recycling the separated granules to the bed.
Dependencies are inferred from the claim text.