Sawdust dryer machine is one of the essential equipment in biomass pellet production, it impact the product quality of the pellets to a large extent. Sawdust dryer is a rotary drum dryer, when working, wet sawdust with a moisture content of 35-45% are fed into the drum via a conveyor, achieving countercurrent drying. The material is continuously lifted and scattered by the inner lifting plates, spiraling forward and sequentially passing through the inner, middle, and outer layers. Through heat exchange with hot air, the moisture content of the sawdust is reduced to 12-15%. After the drying process is completed, the material is discharged via a screw conveyor. The sawdust rotary dryer features a well-designed structure, convenient operation, and high production efficiency.

  The role of sawdust dryer machine in biomass pellet production

  1. Meet the moisture requirements of the granulation process

  The biomass pellet machine compresses raw biomass materials into pellets through high-pressure extrusion, it has very high requirements for the moisture content of raw materials. Excessively high moisture can prevent proper extrusion, while excessively low levels may cause the pellets to crack. The sawdust dryer machine can quickly reduce the moisture content of wet sawdust to 12%-15%, which is the best moisture range for biomass pellet machines.

  2. Improve the quality and grade of pellets

  Raw materials with appropriate water content can produce pellets with higher density, greater hardness, and improved wear resistance, it is not easy to powdering during transportation and storage. By removing excess moisture, the pellets will generate more heat when burned, increasing calorific value and ensuring more complete combustion.

  3. Easy for storage and transportation

  Pellets under moderate moisture conditions, is not easy to mold and decay during storage, with a long shelf life. Additionally, dry pellets have less weigh, resulting in lower transportation costs.

  Only by compressing sawdust under appropriate moisture conditions can pellets with regular shapes, uniform density, and excellent combustion performance be produced. In the sawdust pellet production line, sawdust dryer machine is an essential. Only through efficient and stable drying in the initial stage can the subsequent processes of pelletization, packaging, storage, and transportation proceed smoothly.