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. 14, 1993
Filed:
Apr. 13, 1992
Pasi Salonen, Orivesi, FI;
Tampella Power Oy, Tampere, FI;
Abstract
The invention relates to a combustion unit, which for effecting a circulating mass process comprises a reactor chamber, whose lower part is, for formation of a fluidized bed, fitted with a grate structure (10), at least one particle separator with means for purifying the combustion gas containing solid material, formed in the fluidized bed, from said solid material, and a return duct (6a) for returning the solid material particularly to the fluidized bed. A gas lock structure (KL) as an extension of the return duct (6a) prevents the gas flow to the opposite direction and comprises a combination formed by a closed bottom structure (14), a cover structure (11) placed above the bottom structure (14) and having openings (12a), an interspace (13) formed between the bottom structure (14) and the cover structure (11), and openings (15a) placed in the wall of the return duct (6a) between the bottom structure (14) and the cover structure (11), as seen in vertical direction, and connected with the interspace ( 13). The solid material moves from the return duct (6a) through the openings (12a) of the cover structure (11) to the interspace (13) and exits from the interspace (13) to the fluidized bed above the grate structure (10) through the openings (15a) of the return duct (6a).