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:
Aug. 23, 1983
Filed:
Apr. 13, 1981
Horst Grochowski, Oberhausen, DE;
Karl Knoblauch, Essen, DE;
Bergwerksverband GmbH, Essen, DE;
Abstract
Sulfur oxides and nitrogen oxides are removed from exhaust gases containing additionally oxygen and steam, by the addition of gaseous ammonia at temperatures between about 110.degree. and 180.degree. C. The exhaust gases travel in the interior of a reactor across a travelling bed which goes from above to below, composed of granulated, carbon-containing adsorbent with or without catalysts. In the first travelling bed initially a large portion of the sulfur oxides is adsorptively removed. In the second travelling bed after dosed addition of gaseous ammonia the nitrogen oxides are catalytically reduced to nitrogen as well as further sulfur oxides being separated. The improvement involves extending the path of the exhaust gases between the first and the second travelling beds and introducing into the volume of the exhaust gas stream between the travelling beds a forced mixture of dosed added ammonia with the exhaust gas departing from the first travelling bed.