The purpose of pulp dewatering in stock preparation is to separate solids from pulp slurry.
Technical and Economic Importance of Pulp Dewatering
- Adjusts stock (pulp slurry) consistency to required levels for operations like dispersion and bleaching
- Adjusts pulp consistency to higher levels for effective dispersion of non-fiber solid material
- Efficiently dewatered stock reaches higher temperature and gets dispersed well with lower energy usage
Process of Pulp Dewatering
Dewatering separates a suspension into a thickened part and a filtrate with fewer solids. Various machines are used: drum filters, belt filters, twin-wire presses, disk filters, screw presses, and static filters.
Screw Press Machine
Screw presses have housing, screens, and a screw that turns. The screw moves stock to the outlet, removing water. High stock consistency and dewatering capacity are achieved as the filter mat is continuously removed from the screen cylinder.
Poly Disc Filter
The Poly disc filter is crucial in pulp dewatering as it enhances filtration efficiency and reduces water consumption.
Benefits of Parason Screw Press and Dewatering System
- High throughput and dryness
- Compact design requires less space
- High efficiency and productivity
- Easy to install and operate
- Suitable for different pulp grades
- Low maintenance requirements
- 30%-40% weight reduction of pulp
- Supports variable raw material input
- Reusable water for next batch
