Drying systems
High performance flash tube dryers
Dry chips and fibres in seconds – particulary with high moisture content
Siempelkamp Energy & Drying Solutions (formerly Büttner) flash tube dryers are highly versatile and extremely high performance. The drying systems are employed for drying goods with high surface moisture content or a very high specific surface. They serve, for example, to pre-dry wood flakes before the material makes its way into a drum dryer.
Flash tube dryers are also used as lead dryers for the drying of fibres in medium-density fibreboard production. For many years flash tube dryers have successfully been in global operation in a variety of industrial sectors for many years.
Flash tube dryers can be heated in various ways, for example by:
- Flue gas from a grate-firing system or combustion chamber
- Gas line burner
- Hot gas from a gas turbine or gas motor
- Indirectly through heat exchangers for steam, hot water or thermal oil
- Indirectly by means of electric heat exchanger
- Any combination of the heating types mentioned
Flash dryers primarily consist of a duct through which heated dryer air flows. The product to be dried is brought into the dryer and conveyed further by the dryer air.
Water evaporates in a matter of seconds. At the end of the flash tube, the material is separated from the air stream by means of cyclones. If the flash tube dryer is utilised as a pre-dryer, the material is fed into the drum dryer at the end of the process.
At a glance:
- Water evaporation capacity of more than 70 t/h per unit, depending on the product
- Drying takes place in a few seconds, afterwards the material is separated mechanically or carried through into the attached drum dryer
- Single-stage dryer or two-stage dryer
- Fresh air dryer or dryer with return air operation
- Exhaust air filtering by means of cyclones or exhaust air cleaning systems
Exhaust air filtering by means of cyclones
Exhaust air filtering by exhaust air cleaning systems
