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. 29, 2000
Filed:
Oct. 07, 1998
Applicant:
Inventors:
Ari Tamminen, Pirkkala, FI;
Risto Syrjalainen, Tampere, FI;
Heikki Koivuniemi, Lempaala, FI;
Erkki Valimaki, Tampere, FI;
Assignee:
Kvaerner Pulping Oy, Tampere, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F23J / ; F23M / ; F23L / ;
U.S. Cl.
CPC ...
431-4 ; 431-8 ; 431 10 ; 431190 ; 431164 ; 110303 ; 110214 ; 110265 ; 1261 / ;
Abstract
A method and an arrangement for reducing emissions of nitrogen oxides in a combustion apparatus provided with a tubular furnace. The method comprises burning odor gases at first sub-stoichiometrically, and subsequently supplying additional air to the furnace (3) in the transverse direction thereof in such a manner that the final air ratio is over 1. The arrangement comprises an additional air duct (7) which extends to the furnace of the boiler and from which additional air is supplied to the furnace (3) in the transverse direction of the furnace (3).