Rotary drum dryer for rice husk

1.Product Introduction

A Rotary Drum Dryer for rice husk is a highly efficient thermal system designed to dry loose, lightweight agricultural waste. Fresh rice husks from milling typically contain variable, high moisture that hinders processing and combustion. This dryer utilizes a rotating drum and high-velocity hot air to rapidly reduce the moisture content to under 12%, unlocking the rice husk's full energy potential as a clean biomass fuel.

2.Application

• Biomass Power Plants: Drying rice husks for direct co-firing or combustion to maximize boiler heat output and power generation efficiency.

• Rice Husk Pelleting & Briquetting: Preparing raw husks to the exact moisture levels required to press them into high-density fuel pellets or briquettes.

• Gasification Systems: Supplying uniform, bone-dry rice husk feedstock to gasifiers for high-quality syngas production.

• Silica Extraction & Ash Processing: Pre-drying husks before controlled burning to produce high-purity rice husk ash (RHA) for the cement and steel industries.

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