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:
Dec. 20, 2011
Filed:
Jul. 05, 2007
Yvan Kroemmer, Goetzingen, LU;
Paul Goedert, Mondorf-Les-Bains, LU;
Georges Stamatakis, Canach, LU;
Paul Wurth S.A., Luxembourg, LU;
Abstract
The present invention proposes a pulverized coal injection lance () for feeding pulverized coal from a rear end of the lance () to a front end () of the lance (). The lance () comprises an outer pipe () for conveying combustive gas, and an inner pipe (), coaxially arranged within the outer pipe (), for conveying pulverized coal. The inner pipe () forms a separation wall for separating the pulverized coal from the combustive gas. The separation wall is at least partially discontinued in a region near the front end () of the lance (), thereby forming a mixing region () within the pulverized coal injection lance (). According to an important aspect of the invention, the outer pipe () and the inner pipe () have substantially the same length and wherein the inner pipe () comprises at least one lateral opening () for allowing pulverized coal and combustive gas to come into contact within the pulverized coal injection lance () near the front end ().