Patent ID: 6931757
Filing Date: 2005-08-23
Classification: F26B

Abstract:
1. A method for conditioning a fibrous substance, comprising the steps of circulating a stream of vapor in an essentially closed drying circuit, wherein the essentially closed drying circuit comprises a tubular stream drier, and wherein the stream of vapor flows through the tubular stream drier; feeding wet fibers and propulsive vapor into the tubular stream drier in order to dry the wet fibers, separating dried fibers from the stream of vapor; returning the stream of vapor to a first heat exchanger; uncoupling a part of the stream of vapor upstream of the first heat exchanger; cooling the uncoupled part of the stream of vapor in a vapor condenser, wherein condensate from the vapor condenser is used to generate propulsive vapor in a refiner, and wherein wet fibers produced in the refiner and the propulsive vapor generated in the refiner are fed into the drier in the feeding step; reheating the uncoupled part of the stream of vapor in a second heat exchanger; introducing the reheated uncoupled part of the stream of vapor into a furnace; and burning the reheated uncoupled part of the stream of vapor in the furnace.