The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1981
Filed:
Jun. 08, 1979
Klaus Hein, Bergheim, DE;
Ansgar Schiffers, Aachen, DE;
Abstract
A method of reducing sulfur emissions in boilers fired with brown coal (as an example of low-rank solid fossil fuels with which the invention is usable) wherein finely divided calcium oxide (or calcium-oxide-containing dry materials) as additive is mixed with the fuel before the fuel is introduced into the combustion chamber of the boiler or the burner thereof. Advantageously the additive is mixed with the fuel before the milling thereof. The quantity of finely divided additive which is mixed with the fuel is varied in accordance with the sulfur concentration of the gases at the end of the combustion chamber, e.g. in response to a sulfur dioxide and/or sulfur trioxide sensor, to minimize the sulfur content of the flue gases.