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:
Mar. 21, 1989
Filed:
Nov. 24, 1987
Applicant:
Inventor:
Folke Engstrom, San Diego, CA (US);
Assignee:
A. Ahlstrom Corporation, Karhula, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F23C / ;
U.S. Cl.
CPC ...
122 / ; 110245 ; 110263 ; 110347 ;
Abstract
Solids are separated from the flue gases of a fluidized bed reactor with a circulating bed and provided with cooling surfaces and are recycled to the reactor through return ducts disposed at different heights in the reactor. To control the operation of the reactor the heat removed from the reactor chamber is regulated by changing the suspension density in the reactor chamber. A required suspension density is obtained by regulating the flow of the solids through each return duct.