Rotary Drum Dryer for Wood Pellets with 10% to 15% Moisture Control and Lifting Flights for Continuous Heat Exchange

Rotary drum dryer for wood pellets

1.Product Introduction

A Rotary Drum Dryer for wood pellets (often called a wood pellet rotary dryer) is key pre-treatment equipment in biomass pellet production lines. Because high-quality wood pellets require raw materials (like sawdust or wood shavings) to have a highly precise moisture content of 10% to 15% for optimal extrusion, this dryer is engineered to uniformly dry large volumes of wet wood fibers, ensuring the structural durability and density of the finished pellets.

2.Application

• Wood Pellet Plants: Pre-drying raw materials (sawdust, wood chips, shavings, forest residues) to the exact moisture levels required by pellet mills.

• Biomass Briquetting Lines: Preparing wood waste for compression into fuel briquettes.

• Animal Bedding Production: Processing clean wood shavings to make dry, sterile animal bedding pellets.

3.Working Principle

The dryer operates on a continuous, tightly sealed heat exchange mechanism:

• Feeding: Wet coal is continuously fed into the slightly inclined, rotating cylindrical drum.

• Cascading & Drying: Internal lifting flights and chains lift the coal and shower it through the hot air stream. This constant movement breaks up clumps and creates a uniform curtain of coal, allowing rapid heat transfer and moisture evaporation.

• Discharge & Safety Control: The dried coal slides to the lower discharge end. An induced draft fan pulls the moist air out through a cyclone and baghouse filter to capture fine coal dust. Safety systems, such as inert gas injection or explosion relief valves, are often integrated to manage combustible coal dust safely.

4.Technical Specifications