| 摘要 |
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. |
