An apparatus for washing and dewatering pulp

Details An apparatus for washing and dewatering pulp An apparatus for washing and dewatering pulp

D - Textiles, Paper

21

C

D21C 9/06 (2006.01) B30B 9/20 (2006.01) D21C 9/18 (2006.01) D21D 1/40 (2006.01)

Patent

CA 2708242

An apparatus for washing and dewatering pulp comprising a first and a second rotatable press roll (102, 104) having a permeableouter surface (106, 108), and a casing comprising a vat (114, 116, 118) in which the press rolls (102, 104) are installed, the press rolls (102, 104) defining a press nip (112) between them, in which press nip (112) the pulp is pressed. The vat (114, 116, 118) com- prises a first side vat segment (114) which partly encloses the outer surface (106) of the first press roll (102) and a second side vat segment (116) which partly en- closes the outer surface (108) of the second press roll (104). The casing comprises a first side casing member (115, 215) provided with the first side vat seg- ment (114) and a second side casing member (117, 217) provided with thesecond side vat segment (116). The side casing members (115, 117, 215, 217) being piv- otable about a first and a second rotation axis(121, 123), respectively, and mov- able between a closed position and an opened position for providing access to the press rolls (102, 104). The distance between the first rotation axis(121) and the second rotation axis(123) is less than the sum of the outer diameter of the first press roll (102) and the outer diameter of the second press roll (104).

L'invention concerne un appareil de lavage et d'épaississement de pâte à papier, qui comprend un premier et un second rouleau de presse (102, 104) rotatifs présentant une surface extérieure (106, 108) perméable; et un boîtier muni d'un tambour (114, 116, 118) dans lequel les rouleaux de presse (102, 104) sont installés, lesdits rouleaux de presse (102, 104) délimitant entre eux une pince (112) de la presse dans laquelle la pâte est pressée. Le tambour (114, 116, 118) comprend un premier segment de tambour latéral (114) renfermant partiellement la surface extérieure (106) du premier rouleau de presse (102) et un second segment de tambour latéral (116) renfermant partiellement la surface extérieure (108) du second rouleau de presse (104). Le boîtier comprend un premier élément de boîtier latéral (115, 215) muni du premier segment de tambour latéral (114) et un second élément de boîtier latéral (117, 217) muni du second segment de tambour latéral (116). Les éléments de boîtier latéraux (115, 117, 215, 217) peuvent tourner autour d'un premier et d'un second axe de rotation (121, 123), respectivement, et passer d'une position fermée à une position ouverte pour ouvrir l'accès aux rouleaux de presse (102, 104). La distance entre le premier axe de rotation (121) et le second axe de rotation (123) est inférieure à la somme du diamètre extérieur du premier rouleau de presse (102) et du diamètre extérieur du second rouleau de presse (104).

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