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Mechanical pulping
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APC Advanced Process Controls
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AQC Advanced Quality Controls
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- 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