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:
Jun. 20, 1995
Filed:
Sep. 22, 1993
Timo Hyppanen, Karhula, FI;
A. Alhstrom Corporation, Noormarkku, FI;
Abstract
A circulating fluidized bed (CFB) system and method of operation provide for improved heat recovery. One or more return ducts from a particle separator attached to the combustion chamber have a heat transfer section with heat transfer surfaces. Low velocity fluidizing gas is introduced into a bed of particles having distinct heat transfer and particle transport sections to fluidize the bed, and transporting gas is separately introduced to transport a desired rate of particles from the bed to the combustion chamber through a solid particle inlet which is below the top surface of the bed of particles. Barriers are established which prevent the transporting gas from interfering with heat transfer in the heat transfer section.