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:
Jan. 22, 1985
Filed:
Jan. 11, 1983
Xuan T Nguyen, Montreal, CA;
Domtar Inc., Montreal, CA;
Abstract
Method of stripping SO.sub.2 (sulfur dioxide) from flue gases by passing the SO.sub.2 containing gas through to a bed of particles to fluidize the particles and to form a fluidized bed, injecting a reaction chemical into the bed and reacting it with SO.sub.2 in the fluidized bed thereby to form particles of a combined product, combining the particles with other such particles in the fluidized bed to form bigger pellets and to exhaust gases from the bed relatively free of SO.sub.2 at a temperature as low as possible but high enough to prevent the condensation of the moisture present in the gas stream by adjusting the concentration and feeding rate of the reaction chemical. During that process at least some of the pellets so formed are discarded from the bed. In the preferred arrangement the reaction chemicals are injected into the bed in an aqueous medium and gas entering the bed is at elevated temperature in the order of 200.degree.-300.degree. C. and evaporates the aqueous medium is evaporated to form a dry combined product.