Diffuser

Details Diffuser Diffuser

D - Textiles, Paper

21

C

D21C 9/04 (2006.01)

Patent

CA 2181677

The invention relates to a diffuser (1), comprising a substantially cylindrical, vertical container (2) through which cellulose pulp is arranged to be transported, nozzle arms (6, 7) for delivering a fluid, such as washing liquid, to the pulp, concentrically disposed screen surfaces (3, 4) and screen arms (5) disposed on and connected to the said screen surfaces for withdrawal of the said fluid. The screen arms are provided, at their outer ends, with withdrawal pipes (26), directed substantially vertically downwards, which are slidably controlled and are connected in sealing arrangement to outlets for the said fluid. The invention relates also to a stuffing box designed to receive a rod, preferably a pull rod (29) for raising and lowering a screen pack having screen surfaces (3, 4) in a diffuser, the said rod being guided in sealing arrangement and slidably through a fixture (35; 35') which is mounted in a bearing for free movement in a plane substantially perpendicular to the said rod. The bearing comprises a radially directed bearing flange (44; 44') extending around the said fixture, which bearing flange is mounted between two radially directed retaining flanges (39, 42; 39', 42') extending around the said fixture.

La présente invention se rapporte à un diffuseur (1) comprenant un récipient vertical essentiellement cylindrique (2), à travers lequel de la pulpe de cellulose est transportée, des bras à ajutages (6, 7) diffusant dans la pulpe un fluide, tel qu'un liquide de lavage, des surfaces d'écran concentriques (3, 4) et des bras à écrans (5) reliés auxdites surfaces d'écran et servant à retirer ledit fluide. Les bras à écrans sont pourvus, à leurs extrémités externes, de conduites de retrait (26), dirigées essentiellement verticalement vers le bas, qui sont commandées de manière à coulisser et qui sont en liaison étanche avec des orifices de sortie dudit fluide. L'invention se rapporte également à un presse-étoupe destiné à recevoir un arbre, de préférence un arbre de traction (29) servant à lever et à abaisser un ensemble d'écrans composé de surfaces d'écran (3, 4) dans un diffuseur, cet arbre étant guidé de manière à former une étanchéité et à coulisser à travers un dispositif de serrage (35; 35') qui est monté dans un palier afin de pouvoir se déplacer librement dans un plan essentiellement perpendiculaire audit arbre. Le palier comprend une bride radiale (44; 44') située autour du dispositif de serrage et montée entre deux brides radiales de retenue (39, 42; 39', 42') s'étendant autour du dispositif de serrage.

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