Method for drying a substance, in particular wood shavings

Details Method for drying a substance, in particular wood shavings Method for drying a substance, in particular wood shavings

1995-11-21

1997-12-16

Bennett, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With waste gas heat and/or power conservers

34219, 34 79, 34 78, F26B 1900

Patent

active

056971672

ABSTRACT:
In a process for drying a substance, particularly wood shavings, wood chips or wood flakes, a partial stream of the vapor-gas mixture is separated after passing through the drying drum before the vapor-gas mixture is led to a first heat exchanger. This separated partial stream is led through a supplementary heat exchanger before it is conducted into the combustion chamber of the furnace in which combustion takes place of the gases arising during the drying. The flue gases are led through the aforementioned supplementary heat exchanger before they reach the first heat exchanger whereby they are brought down to a lower temperature. In this way the thermal stress on the material of the heat exchanger elements of the first heat exchanger is reduced, thereby increasing the life of these heat exchanger elements.

REFERENCES:
patent: 3936951 (1976-02-01), Haueise et al.
patent: 4132007 (1979-01-01), Voorheis
patent: 5237757 (1993-08-01), Wiedmann et al.
patent: 5263266 (1993-11-01), Schmidt
patent: 5271162 (1993-12-01), Kunz et al.

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