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:
Jul. 12, 1988
Filed:
Apr. 01, 1987
John T Tang, San Diego, CA (US);
Juha P Sarkki, San Diego, CA (US);
Asfaha Tesfai, San Diego, CA (US);
Folke Engstrom, San Diego, CA (US);
Pyropower Corporation, San Diego, CA (US);
Abstract
NO.sub.x reduction in a combustion product flue gas stream is greatly improved by the efficient mixing of the reducing agent, e.g., NH.sub.3 or an NH.sub.3 precursor, with the stream in the absence of a catalyst, such as CaO or CaCO.sub.3, that promotes undesirable combination of NH.sub.3 and O.sub.2 to form additional NO.sub.x. By employing a high-temperature cyclone separator of the like and by injecting the reducing agent into the stream within such hot cyclone at a location where there is a strong vortex region, extremely efficient mixing of the NO.sub.x reducing agent and the combustion product flue gas is promoted after particulates which are harmful to the reaction that promotes NH.sub.3 and NO.sub.x reduction have been separated from the flue gases. A refractory-lined cyclone separator may be employed, and a plurality of injectors used which discharge liquid or gas into the strong vortex region.