- 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
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Automation for pulp
- Distributed control systems
- Industrial applications
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APC Advanced Process Controls
- Valmet WinGEMS
- Valmet Debarking Optimizer
- Valmet Batch Cooking Optimizer
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- 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
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Services for pulp
- Spare and process parts
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- Fabrics
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- Fiber Technology Center
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- Pulp
- Mechanical pulping
- Chip treatment
- Prestreaming bin
Prestreaming bin
The presteaming bin is a chip bin for allowing buffer storage and presteaming of the raw material.
The bin is of a hopper design and consists of a cylindrical and conical top section and a conical bottom section. The raw material enters the bin at the top and leaves through the conical bottom section.
In the conical bottom section a vibrating cone is inserted to help prevent bridging of the raw material in the bin. The preheated steam is introduced below this cone and distributed both in the middle and around the periphery of the bin where it meets the raw material passing down between the cone and the bin wall. The bin is designed for 15 to 20 minutes retention time.
Benefits
- Pretreatment of the raw material by steam at an elevated temperature for a certain time
- Moisture increase of the raw material
- Reduction of natural wood resins
- Improved dewatering in the screw feeder