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. 24, 2007
Filed:
Dec. 30, 2003
Kari Saviharju, Espoo, FI;
Jorma Simonen, Alpharetta, GA (US);
Liisa Simonen, Alpharetta, GA (US);
Esa Vakkilainen, Helsinki, FI;
Esko Mattelmaki, Porvoo, FI;
Kari Saviharju, Espoo, FI;
Jorma Simonen, Alpharetta, GA (US);
Liisa Simonen, Alpharetta, GA (US);
Esa Vakkilainen, Helsinki, FI;
Esko Mattelmaki, Porvoo, FI;
Andritz Oy, Helsinki, FI;
Abstract
An arrangement is disclosed for supplying an air jet form to the furnace of a recovery boiler, where the furnace has a front wall, a rear wall and side walls. Black liquor spraying devices are disposed on the furnace walls at one or several levels of the furnace. A plurality of air ports are located at several horizontal levels for introducing air into the furnace from an air supply. In the arrangement for the secondary air flows, two horizontal air levels at different elevations are arranged above the lower primary levels and below the black liquor sprayer. Secondary air is supplied from two opposite walls and the air ports from each of the two levels are located so that the air jets are introduced in an interlaced pattern having an even number of jets on one opposite wall and an uneven number of jets on the other opposite wall. The air jets of said at least two air levels are located substantially one above each other in substantially vertical rows.