Products Drying

Continuous Flow Dryer DWU

PETKUS Continuous Flow Dryers Type DWU are designed for drying grain, corn, oilseeds, and free flowing pellets such as clay mineral and straw pellets. Three series (1500, 2500, 4000) with capacities from 8 t/h and 55 t/h (based on wheat) are available. The continuous flow dryers of the "DWU"-series are equipped with an efficient stainless steel heat exchanger, which separates the flue gas from the drying air, as well as an air recirculation system.
Product enters the top of the dryer column and flows to the discharge over conical, inverted V-shaped air ducts arranged in an alternating pattern.  During the process the product is continuously mixed and the hot air from the burner is evenly distributed through the product. The required airflow is generated by axial flow fans, positioned on the roof of the exhaust air duct. The hot air is generated with a combination of burner and heat exchanger. The air speed can be adjusted using a false air flap within the dryer column. The unsaturated hot air from the lower drying sections and cooling air are drawn in by the recirculation fans and mixed with the hot air thus reducing overall energy consumption.  Louver dampers behind the axial flow fans close during product infeed and prevent the discharge of dust into the exhaust air.

Characteristics
  • Model in galvanized sheet steel
  • Gentle and even drying
  • Operated with gas or oil burner
  • Indirect heating through heat exchangers
  • The exhaust gases from the combustion process are separated from the processing air
  • Use of steam, hot water and thermal oil heat exchangers is possible
  • Three models designed for different capacities
  • Conical air ducts increase the capacity by 10-12%
  • Insulated hot air duct
  • Lower power demand due to air recirculation principle
  • Low dust emission, comply with EU-limits
  • Simple and quick assembly as no scaffolding is required
  • Relatively small floor space
  • Storage tank with level sensor
  • Control cabinet with touch panel and control software
    DWU 15 DWU 25 DWU 40 DWU 60
Length (mm) 6 020 8 160 8 160 9 180
Width (mm) 1 570 2 440 3 890 6 210
Number of sections   9 - 14 10 - 18 12 - 22 13 - 22
Height (mm) 10 885 - 15 335 11 775 - 18 895 13 555 - 22 455 14 445 - 22 455
Output¹ (t/h) 8 - 15 15 - 30 30 - 64 60 - 100

¹ based on wheat, consumer product