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US 5,366,288 AGranted
Apparatus for mixing a suspension of cellulosic fibrous material and fluid
AssigneeKamyr Aktiebolag
InventorsHakan Dahllof, Rolf Ekholm, Ulf Jansson
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AssigneeKamyr Aktiebolag
InventorsHakan Dahllof, Rolf Ekholm, Ulf Jansson
Estimating the term…
An apparatus for mixing pulp and fluid includes a housing with a center line an inlet and outlet for the pulp; an inlet for the supply of fluid and two walls are arranged in the housing and have opposite sides which between them define a gap-shaped surface through which the pulp will flow and has inlet and outlet openings communicating with the pulp inlet and outlet respectively; the walls are arranged concentrically in the housing and are non-rotatable with opposite sides thereof being arranged to extend around the central line of the housing, spaced therefrom, the gap-shaped space thus acquiring the shape of a concentric annular gap; the annular gap has an extension in excess of 20 mm in the main flow direction of the medium flowing through it; there is a distribution chamber communicating with and arranged axially upstream of the annular gap in order to distribute the pulp uniformly around the entire concentric inlet opening of the annular gap.
An apparatus for mixing a suspension of cellulosic fibrous material and a fluid comprising a housing having a center line, an inlet and an outlet for the fiber suspension, said inlet and said outlet being spaced apart axially from each other along said center line of said housing, a fluid inlet and two cooperating walls in said housing at a distance from each other, said walls having sides facing each other to define a gap through which the fiber suspension will flow, said apparatus including a gap inlet opening for the suspension and a gap outlet opening, each respectively in communication with said inlet and outlet for the fiber suspension, wherein said walls are disposed concentrically in said housing and are non-rotatable, said sides of said walls extending around said center line of said housing and spaced therefrom, said gap having the shape of a concentric annular space having an extension greater than 20 mm in the main flow direction of the medium and wherein said housing includes a distribution chamber in communication with and axially upstream of said annular gap to distribute the fiber suspension uniformly around the entire concentric inlet opening of said annular gap.
The method of mixing a suspension of cellulosic fibrous material and gas in a quantity of over 50% of the total flow volume comprising the step of using an apparatus for mixing the suspension of cellulosic fibrous material and a fluid comprising a housing having a center line and inlet and out for the fibrous suspension, said inlet and outlet being spaced axially from each other with respect to the center line of the housing, inlet means for the supply of said fluid to the fibrous suspension;
Dependencies are inferred from the claim text.