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:
Oct. 28, 1986
Filed:
Jul. 25, 1985
David T Clay, Appleton, WI (US);
Timothy B Cartwright, Appleton, WI (US);
The Institute of Paper Chemistry, Appleton, WI (US);
Abstract
Pulping liquor, which has been pre-concentrated to at least 50 weight percent solids, is dried in a fluidized bed dryer to produce a solid in particulate form. In the fluidized bed dryer, pre-formed particulates are fluidized by a gaseous medium substantially of superheated, unsaturated steam, and additional heat is supplied to the fluidized bed by higher pressure saturated steam passing through heat-exchange tubing within the fluidized bed region. Pulping liquor is introduced into the fluidized bed where the superheated steam vaporizes a substantial portion of its water content. The fluidizing steam becomes substantially saturated during its passage through the region of the fluidized bed, and a substantial portion of this substantially saturated steam is used upstream to pre-concentrate the pulping liquor. The solid particulates that are continuously withdrawn from the region of the bed have several advantages relative to a pulping liquor as a fuel for a pulping chemical recovery furnace, including increased thermal efficiency and storability until time of use.