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US 5,630,909 AGranted
Pulp fluffing gas contactor
AssigneeBeloit Technologies, Inc.
InventorChristopher J. LaRiviere
Life of this patent
Estimating the term…
Abstract
A guide vane is provided in a pin fluffer to assist in pulp mat retention during fluffing by providing a cyclic lift component to the mat as it passes over the vane thereby also further increasing retention time obtained in the fluffer.
Claims19
A pulp fluffing contactor comprising:
- a cylindrical shell having a solids inlet adjacent one end and a solids outlet adjacent an opposite end and a gas inlet for introducing a gas into said shell;
- a cylindrical rotor mounted for rotation within said shell of sufficient diameter to form a restricted annular space of convenient axial length;
- said rotor being further provided with a plurality of radially outward extending projections subscribing a rotary path for imparting a circumferential swirl to solid fibrous material introduced within the shell;
- said shell being further provided with a plurality of guide foils projecting into said annular space intermediate the rotary paths subscribed by said projections and oriented generally parallel to said rotary paths;
- said guide foils further comprise a first combing portion and a second axially directing portion set at an accurate angle to said rotary paths for axially directing said circumferential swirl;
- and
- a leading edge of each guide foil being set at an inwardly diverging angle from a surface of the foil attached to the cylindrical shell and the second foil surface being structured to impart a slight lifting as the pulp flows past the surface.
4 more elements
A pulp fluffing contactor comprising:
- a vertically orientated cylindrical shell having a solids inlet adjacent a top end and a solids outlet adjacent a bottom end and a gas inlet for introducing a gas into said shell;
- a cylindrical rotor mounted for rotation within said shell of sufficient diameter to form a restricted annular space of convenient axial length;
- said rotor being further provided with a plurality of radially outward extending projections subscribing a rotary path for imparting a circumferential swirl to solid fibrous material introduced within the shell;
- said shell being further provided with a plurality of guide foils projecting into said annular space intermediate the rotary paths subscribed by said projections and oriented generally parallel to said rotary paths;
- said guide foils being further provided with a leading first combing portion oriented substantially parallel to said rotary paths and a second trailing portion set at an accurate angle to said rotary paths providing an axially directing portion;
- and
- a leading edge of each guide foil being set at an inwardly diverging angle from a surface of the foil attached to the cylindrical shell and the second foil surface being structured to impart a slight lifting as the pulp flows past the surface.
4 more elements
Dependencies are inferred from the claim text.