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Drying systems


Indirectly heated rotary tube bundle dryers

Drying systems for flakes and bulk solids – designed for lower capacitiesin combination with CHP

Siempelkamp Energy & Drying Solutions (formerly Büttner) indirectly heated rotary tube bundle dryers are specifically designed to work with co-generation systems (CHP) and with heat pumps. 

They provide reliable and efficient drying of wood chips and other free-flowing wood material, biomass products and bulk solids.
 


At a glance:

  • Water evaporation capacity of up to 25 t/h, depending on the product
  • Heated indirectly by steam, hot water or thermal oil
  • Application in combination with CHP
  • Product separated via discharge box
  • Exhaust air filtering by means of cyclones or bag filter

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Drying process

The product to be dried enters through an air-tight rotary valve and into a rotating single-pass dryer drum with installed tube bundle. The product then flows through the heated tube bundle, which turns with the drum casing and warms the product. The water contained in a product is then evaporated into the dryer air, which is preheated by heat exchangers. 
At the end of the dryer drum, the dried product is separated in a discharge box and discharged through an air-tight rotary valve. Warm and moist dryer air is extracted and dedusted in cyclones or bag filters.