Process Function

The digester performs two key functions in palm oil extraction:

Mechanical rupture of mesocarp cells to release oil

Thermal conditioning to reduce oil viscosity and improve flowability

This ensures that the material entering the screw press is fully conditioned for efficient oil separation.

Working Principle

Sterilized palm fruit is fed into the vertical digester and processed under continuous mixing and controlled heating.
Multi-level stirring blades continuously break down fruit structure
Indirect steam jacket provides uniform heating
Temperature and residence time are controlled according to fruit maturity and processing conditions
Oil droplets are released from ruptured cells and form a continuous oil phase
The conditioned mash is then discharged to the screw press for mechanical extraction.

Design Features

• 1.Vertical multi-stage structure for continuous digestion
• 2.Heavy-duty agitator system for effective fiber breakdown
• 3.Indirect steam jacket heating for uniform temperature control
• 4.Adjustable residence time via controlled discharge system
• 5.High-torque drive system designed for high-density material
• 6.Wear-resistant internal structure for long service life
• 7.Suitable for continuous 24/7 mill operation

Engineering Benefits

Improves oil cell rupture efficiency prior to pressing
Enhances oil flowability and extraction performance
Reduces load on screw press system
Improves stability of pressing operation
Contributes to lower residual oil in press cake
Extends service life of press components (screw, cage, cone)
Supports stable operation during peak harvesting periods

Technical Specifications (Reference Model – 15 TPH)

The Vertical Palm Fruit Digester is a key conditioning unit in palm oil milling, ensuring effective mechanical and thermal treatment of sterilized fruit prior to pressing. It improves extraction efficiency, stabilizes pressing performance, and supports reliable large-scale mill operation.