Kvaerner Pulping Ab

Glv Finance Hungary Kft., Luxembourg Branch

Stefan Hansson

Bo Clarstrom

Axel Lamas

Goran Brottgardh

Jesper Karrhammar

Johan Eriksson

Bo Clarström

Axel Lämas

A device for washing and dewatering a fiber pulp suspension. The device has two hollow, circular-cylindrical screen members that contain evacuation chambers for conducting away liquid. The screen members rotate towards each other for the purpose of forming a nip. At least one of the screen members is arranged in a trough which partially encloses the casing and which converges towards the casing in the direction of rotation of the screen member. At least one pulp inlet box is arranged at the highest point of the screen members for the purpose of introducing pulp between the casing the trough. The pulp inlet box is provided with a pressure equalization section in which a certain equalization of irregularities in pulp qualities takes place before the pulp is fed into the actual washing or dewatering gap.

Distribution device for a device for dewatering pulp

The arrangement is for washing and dewatering a fiber pulp suspension. The arrangement comprises two hollow, circular-cylindrical screen members that have evacuation chambers arranged inside the screen members for leading off liquid. The screen members rotate counter to each other to form a nip. At least one of the screen members is arranged in a trough that partially encloses the jacket of the screen member and, in the direction of rotation of the screen member, converges towards the jacket of the screen member. A sealing arrangement for a pulp head box distributes the pulp onto the jacket surface of the screen members. By forming a progressively decreasing gap B-A at the pulp head box counter to the rotation of the screen member, a simple self-sealing of the pulp suspension can be obtained which allows fiber residues to be returned to the dewatering zone.

Sealing arrangement for a pulp dewatering arrangement

The replaceable wearing surface is for a sealing arrangement on drum end walls on a press drum that de-waters fiber suspensions radially into the drum through the shell of the drum. The wearing surface of the sealing arrangement has a wear ring and holder members. The wear ring is, on a side that faces into the drum from the drum end-wall, provided with locking members. The locking members are arranged parallel to the drum axis and are preferably in the form of knob-shaped locking members. The arms of the holder members are designed to engage the locking members. The holder members are fastened to the drum end wall by suitable fixing members.

Replaceable wearing surface for a sealing arrangement

Device for the washing and dewatering a fibrous suspension, which device incorporates two hollow, circular cylindrical filter drums ( ), which filter drums incorporate evacuation chambers inside the filter drums for evacuation of fluid. The filter drums rotate in opposite directions to create a pinch ( ) where at least one of the said filter drums ( ) is installed in a trough ( ) which partly encloses the outer surface ( ) of the filter drum and which, in the direction of rotation of the filter drum, converges towards the outer surface of the filter drum. At least one pulp inflow chamber ( ) is installed at the highest point ( ) of one or both of the filter drums each equipped with a trough for the introduction of pulp between the outer surfaces ( ) of the filter drum and its trough ( ) for the formation of a fibrous web. The trough ( ) is designed to enclose the outer surface ( ) of the filter drum, from the inflow chamber ( ) and further round at least 230&deg; of the circumference of the outer surface, so that the said fibrous web during operation is constrained to run between the filter drum's outer surface ( ) and the trough ( ) round at least 230&deg; of the circumference of the outer surface before the fibrous web reaches the pinch ( ).

Device for the treatment of a fibrous suspension

Device for the washing and dewatering a fibrous suspension, which device incorporates two hollow, circular cylindrical filter drums (,), which filter drums incorporate evacuation chambers inside the-filter drums for evacuation of fluid. The filter drums rotate in opposite directions to create a pinch (,) where at least one of the said filter drums (,) is installed in a trough (,) which partly encloses the outer surface (,) of the filter drum and which, in the direction of rotation of the filter drum, converges towards the outer surface of the filter drum. At least one pulp inflow chamber (,) is installed at the highest point (,) of one or both of the filter drums each equipped with a trough for the introduction of pulp between the outer surfaces (,) of the filter drum and its trough (,) for the formation of a fibrous web. The trough (,) is designed to enclose the outer surface (,) of the filter drum, from the inflow chamber (,) and further round at least 230&deg; of the circumference of the outer surface, so that the said fibrous web during operation is constrained to run between the filter drum's outer surface (,) and the trough (,) round at least 230&deg; of the circumference of the outer surface before the fibrous web reaches the pinch (,).

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Karlstad, Sweden

Stefan Hansson