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A. Alhstrom Corporation Patents
A. Alhstrom Corporation
Noormarkku, FI
No. of patents:

Patent Number Title Of Patent Date Issued
5425412 Method and apparatus for operating a circulating fluidized bed reactor system June 20, 1995
A circulating fluidized bed (CFB) system and method of operation provide for improved heat recovery. One or more return ducts from a particle separator attached to the combustion chamber have a heat transfer section with heat transfer surfaces. Low velocity fluidizing gas is introduced
5116423 Apparatus for washing pulp May 26, 1992
The present invention relates to a method and an apparatus for washing pulp according to which method the pulp is supplied onto a movable liquid-pervious support surface to form a substantially continuous layer; and washing liquid is supplied to the pulp layer and passed in several s

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