Pressure cyclone

The surplus steam from the refiner blows the pulp to the top of the pressure cyclone, where it is fed in tangentially under pressure. The pulp is separated by the centrifugal force and by sedimentation. The steam goes upwards in the center of the cyclone and out to a heat recovery system. A scraper prevents pulp to get stuck on the inside of the jacket. In the bottom of the cyclone, a discharge screw feeds the pulp to a latency tank. The pulp plug and the counter-pressure device seal against steam pressure in the cyclone.

The pressure cyclone consists of a cyclone with steam/pulp inlet and a steam outlet, a jacket scraper, a plug screw feeder and a counter-pressure device in the bottom.

The scraper is sealed with optional packing box or mechanical sealing and is driven by an AC-motor via a worm gear unit. The screw shaft is sealed with a mechanical sealing, journaled by oil-lubricated bearings and is driven by an AC-motor via a shaft-mounted gear reducer and a belt drive.