A. Ahlstrom Corporation

Lehtinen, Jouni

Jorma Elonen

A method of and an apparatus for separating gas from a gas containing suspension, generally a liquid medium, which may contain solid material, such as fibers in the pulp and paper industry. At least a portion of the suspension is first subjected to the centrifugal action of a centrifugal pump and then to further centrifugal separation of a centrifugal separator so as to divide the suspension at least once into two fractions, of which the heavier fraction containing less gas is discharged from the apparatus and the lighter fraction containing more gas is returned back to the suction side of the centrifugal pump. The apparatus is characterized in that the casing of the centrifugal pump is connected to a centrifugal separator for dividing the suspension into two fractions, the separator having a conduit for the discharge of the heavier fraction from the separator and a conduit for returning the lighter fraction to a channel leading to the suction side of the pump.

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Kouvola, Finland

Lehtinen, Jouni