Sawdust dryer machine-important equipment in sawdust pellet production

  Rotary Steam Tube Dryer is a specialized industrial dryer commonly used for drying materials in the form of slurry, powders, or pastes. It operates based on indirect heat transfer, making it ideal for heat-sensitive materials or those that need to be dried without direct exposure to hot air or gases.

  The basic design of Rotary Steam Tube Dryer consists of a rotating cylindrical drum equipped with steam tubes mounted on its inner surface. The dryer is typically tilted at a slight angle, allowing the material to flow through the drum as it rotates. Steam is injected into the tubes, which are arranged radially inside the drum, and the heat from the steam indirectly heats the material being dried.

  The working principle starts when steam is introduced into the hollow steam tubes. As the drum rotates, the material inside comes into contact with the heated steam tubes. The heat from the steam is transferred through the tube walls to the material, causing the moisture within the material to evaporate. The steam inside the tubes acts as a heat transfer medium, preventing direct contact between the material and the heating surface, which helps in preserving the integrity of the product and reducing the risk of overheating or burning.

  As the drum rotates, the material is continually lifted and tumbled, allowing for uniform exposure to the steam-heated surface. This process ensures that the material is evenly dried. The moisture that evaporates from the material is typically carried away by a stream of air or vacuum, depending on the system's design.

  The rotary design of the dryer ensures efficient heat transfer and material movement. By rotating the drum, the dryer prevents material from clumping together and facilitates continuous drying. This type of dryer is highly efficient, as it uses steam – a readily available and cost-effective heat source – while minimizing energy losses.

  In conclusion, the Rotary Steam Tube Dryer is an effective solution for drying heat-sensitive materials. It works by using steam to indirectly heat the material while rotating the drum to achieve uniform drying, widely used in the drying of small particles or weakly agglomerated powdery materials such as biomass, feed, ddgs, fertilizers, slag, coal, and mines. If you are interested in the equipment, please contact us.