The Role of Detrashing in the Pulping Process
Detrashing refers to the removal of impurities and non-fibrous materials from raw materials like wood or recycled paper, to produce a cleaner and higher-quality pulp. This process is crucial because it directly affects the quality and efficiency of subsequent manufacturing stages.
The pulping process converts raw materials into a homogeneous fiber-water mixture for papermaking. Detrashing eliminates unwanted elements including bark, stones, wires, metal, and plastics that compromise final product quality.
Key Benefits
Efficient detrashing provides multiple advantages:
- Equipment Protection: Reduces wear and tear from abrasive contaminants
- Quality Enhancement: Minimizes contaminants and defects in finished paper
- Operational Efficiency: Prevents equipment damage, reduces downtime, and optimizes pulp quality
Machines Used for Detrashing
Asymmetric Fiber Saver
This machine uses asymmetric design to separate fibrous materials from contaminants, maintaining pulp quality and preventing unwanted materials from entering the pulping process.
Inclined and Horizontal Trommels
Cylindrical rotating screens that separate materials by size. Inclined trommels use gravity assistance, while horizontal trommels employ rotation to remove heavy reject materials.
Additional Equipment
- Ragger
- Rope Cutter
- Grapple
- Junk Trap
Parason Fiber Guard: Combined AFS and Trash Pump
The Parason Fiber Guard combines an Asymmetric Fiber Saver with a trash pump, handling contaminated stock by using rotor-generated pressure to separate contaminants while directing disintegrated fibers to screening.
Advantages
- Optimized for waste paper wet preparation
- Removes impurities with minimal fiber loss
- Prevents pulp jamming in downstream operations
- Energy-efficient design with low maintenance requirements
Enhance Your Pulp Quality With Parason
Parason Machinery brings five decades of expertise in manufacturing paper mill machinery, serving over 60 countries. Contact us for your paper mill machinery needs.
