- Complete pulp mills
- Chemical pulping
- Wood handling
- Cooking and fiber line
- Pulp drying and baling
- Chemical recovery
- Air emission control
- New value-adding processes
- Dissolving pulping
- Mechanical pulping
- Recycled fiber
-
Automation for pulp
- Distributed control systems
- Industrial applications
-
APC Advanced Process Controls
- Valmet WinGEMS
- Valmet Debarking Optimizer
- Valmet Batch Cooking Optimizer
- Valmet Continuous Cooking Optimizer
- Valmet Washing Line Optimizer
- Valmet Oxygen Stage Optimizer
- Valmet Bleaching Optimizer
- Valmet Evaporation Optimizer
- Valmet Recovery Boiler Optimizer
- Valmet Recovery Boiler Leak Detector
- Valmet Recovery Boiler Sootblowing Optimizer
- Valmet Causticizing Optimizer
- Valmet Lime Kiln Optimizer
- Valmet Recovery Line Management
- Mill information management
- Quality control systems
- Analyzers and measurements
- Automation services
-
Services for pulp
- Spare and process parts
- Field services
- Workshop and roll services
- Fabrics
- Maintenance development and outsourcing services
- Process upgrades
- Process and production optimization
- Industrial Internet solutions
- Automation services
- Service agreements
- Valmet's way to serve
- Service centers
- Sustainability for pulp
- Fiber Technology Center
- Pulp references
- Pulp news and stories
- Pulp
- Mechanical pulping
- Steam separation
- Pressure cyclone
Pressure cyclone
A pressure cyclone is designed to separate steam from the pulp. The de-steamed pulp is transported to a latency tank and the steam is recycled in the process.
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.