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 2708238

An apparatus for washing and dewatering pulp comprising a first and a second rotatable press roll (102, 104) having a permeable outer 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) comprises 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) provided with the first side vat segment (114) and a second side casing member (117) provided with the second side vat segment (116), at least the first side casing member (115) being pivotable about a rotationaxis(121). The apparatus comprises a first pulp distribution device (126) for distributing pulp on the first press roll (102) and a second pulp distribution device (128) for distributing pulp on the second press roll (104), where at least the first pulp distribution device (126) is mounted on the first side casing member (115), whereby the first pulp distribution device (126) is moved away from the first press roll (102) together with the first side casing member (115) when this is moved from its closed position to its opened position.

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) muni du premier segment de tambour latéral (114) et un second élément de boîtier latéral (117) muni du second segment de tambour latéral (116), au moins le premier élément de boîtier latéral (115) pouvant tourner autour d'un axe de rotation (121). L'appareil comprend un premier dispositif de distribution de la pâte (126) servant à distribuer la pâte sur le premier rouleau de presse (102), et un second dispositif de distribution de la pâte (128) servant à distribuer la pâte sur le second rouleau de presse (104). Le premier dispositif de distribution de la pâte (126) est monté sur le premier élément de boîtier latéral (115) de manière à s'éloigner du premier rouleau de presse (102) solidairement du premier élément de boîtier latéral (115) lorsque celui-ci se déplace de sa position fermée à sa position ouverte.

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