Abstract: The invention relates to a method for conditioning fibrous substances, especially wood fibers that are dried in a dryer. In a substantially closed drying circuit (1) a vapor-gas mixture is guided in said dryer as a circulating gas (referred to as vapors) that is separated from the dried fibers (6) in a separator (5) once it has passed the drier, and is then returned to a first heat exchanger (7) connected to the drying circuit (1). Gas is heated in a furnace (11) and is supplied to the heat exchanger to heat the vapors. A partial flow (8) of the vapors is coupled out upstream of the first heat exchanger (7) when seen in the direction of the drying circuit (1), heated in a second heat exchanger (10) and is then supplied to the furnace (11) and combusted. In order to reduce emissions and save energy, the partial flow (8) of vapors coupled out, before being heated in the second heat exchanger (10), is cooled in a vapor condenser (9) and depleted, and the resulting condensation product (14) is fed out.

Abstract: The invention relates to a method for conditioning fibrous substances, especially wood fibers that are dried in a dryer. In a substantially closed drying circuit (1) a vapor-gas mixture is guided in said dryer as a circulating gas (referred to as vapors) that is separated from the dried fibers (6) in a separator (5) once it has passed the drier, and is then returned to a first heat exchanger (7) connected to the drying circuit (1). Gas is heated in a furnace (11) and is supplied to the heat exchanger to heat the vapors. A partial flow (8) of the vapors is coupled out upstream of the first heat exchanger (7) when seen in the direction of the drying circuit (1), heated in a second heat exchanger (10) and is then supplied to the furnace (11) and combusted. In order to reduce emissions and save energy, the partial flow (8) of vapors coupled out, before being heated in the second heat exchanger (10), is cooled in a vapor condenser (9) and depleted, and the resulting condensation product (14) is fed out.