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:
Nov. 14, 1989
Filed:
Oct. 21, 1986
Arnaud Delebarre, Lille, FR;
Paul W Witwicki, Bethune, FR;
Charbonnages DeFrance, Paris, FR;
Abstract
Fluidized bed apparatus comprises a perforated grid to which fluidizing gas is fed by way of a plurality of tubes to fluidize particles supported on the grid. Each tube is connected to a respective blow opening of the grid by way of an erect tubular end part. Apparatus for supplying the openings of the grid with unclogging gas comprises a plurality of injection tubes, each arranged to extend within a corresponding tubular end part. Each injection tube has a number of lateral orifices for the passage of the unclogging gas to be supplied to the injection tube. The unclogging gas is used to disaggregate any particles accumulating in said tubular end part during stoppages in operation of the bed.