- Complete pulp mills
- Chemical pulping
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Chemical recovery
- Evaporators
- Recovery boilers
- White liquor plant
- Process support and optimization
- Rebuilds and upgrades
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- Services for chemical recovery
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- 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
- 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
- Boiler Diagnostics Systems
- Automation services
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- Fiber Technology Center
- Pulp references
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- Pulp
- Mechanical pulping
- Chip treatment
- Plug screw feeder
Plug screw feeder
ADI is a plug screw feeder that feeds chips continuously into a pressurized or liquid-filled vessel.
The screw feeder consists of a chip inlet, tapered compression zone, chip/and drain outlet. The feed screw is journaled by oil-lubricated bearings, and driven by a frequency controlled AC-motor via a foot-mounted gear reducer. The shaft is sealed with a stuffing box.
The plug screw feeder compresses the chips to:
- Remove pitch, water and remaining air, without shortening fiber length
- The highly compressed chips are discharged into the impregnator via a blow-back piston
- The pressate is recycled back to the chip wash to maximize pulp yield
- The screw is easy to operate and needs very little maintenance