Tube Bundle Dryer

Fruit Plants

Operation is fully automatic with low maintenance.
Steam Tube Bundle Dryers are based on the conduction mode for drying. The product to be heated and dried only contacts steamheated tubes, and not directly steam. Tube bundles are operated on the counter-flow principle (i. e. steam flows in the direction opposite t0 the direction of the material flow). The Tube Bundle Dryers are designed by considering the wet and dry product flow characteristics, lump crust formation tendency and thermal sensitivity of the material in dry condition.

Indirect Steam Tube Rotary Dryer
In Indirect Steam Tube Rotary Dryer the tubes are arranged in a circumferential manner on the inner periphery of the rotating shell. This entire shell and tubes assembly is supported on tyres / rollers & driven throughsuitable gear drive. Wet feed material is fed through material inlet nozzle installed at one end of the shell of dryer. This wet feed is fed through Screw Feeder. Feed material showered on the tubes with the help of lifting blades which are mounted on the rotating shell. Steam enters in the tubes through rotating joint installed at material discharge end of the shell. Material gets dried & discharged from the material discharge ports on the shell. Vapours are removed from the feed end with the help of suction blower after separating fines in the cyclone separator. The suitable sealing arrangement is provided to prevent air leakage and product \losses.

Rotary Tube Bundle Dryers :
In Rotary Tube Bundle Dryer the Tube Bundle is rotated inside the stationary insulated housing. Steam is passed though one end of Tube Bundle for drying and condensate is removed from the other end.Wet feed Material to be dried is fed into the stationary dryer housing from Feed Nozzle at one end. The material gets lifted up & showered on tubes with the help of lifting blades provided on tube bundle periphery. Material gets dried by conduction heat transfer & it is discharged from the other end.

RAJ offers customized configurations of Steam Tube Dryers :

  • Vapor Exhaust : Natural Draft / Induced Draft.
  • Fines Recovery : Cyclones / Bag Filters / Settling Chambers.
  • Heating Media : Steam / Hot Oil.
  • Feed preconditioning, Product backmixing systems.
  • Feed & product handling, conveying systems.

Features of the RAJ Steam Tube Bundle Dryer :
  • Operation is fully automatic with low maintenance.
  • Reduced wear and tear of parts.
  • Less space requirements.
  • Minimum air flow giving the reduced output of waste air.
  • Simple installation & robust Construction.
  • Safe Operation.
  • Low temperature drying for high quality products to avoid losses of vitamins, nutrients and taste change.
  • Mild steel or stainless steel and constructions as required

Applications :

Distillery Industry : Drying of distillers grains.

Extraction Industry : Conditioning of broken soya beans, sunflower seeds, whole or flaked rape and other oilseeds. Pre -desolventizing of oilseed coarse meal prior to the toaster.Drying of oilseed coarse meal after the toaster.

Brewing Industry : Drying of spent grains.

Chemical and Plastics Industries: Drying of granulates

Wood processing industry : Drying of wood chips.

Environment processing : For disposal of liquid sewage, waste water and paper sludge

Other : In many of these cases the materials viscosity is improved by partial recycling.


  • Fully automatic system to ensure smooth and easy operation.
  • Sterile construction of equipment to maintain high hygiene level.
  • Energy Efficient.
  • Optimal space requirement.
  • Carefully selected material of constructions taking into account the product properties.
  • Complete sanitary design with CIP system.
  • PLC controlled SCADA operated system.


  • Turnkey Plants.
  • Manufacturing & Supply of Equipments.
  • Engineering and Supervision of Civil and Structural work.
  • Process and Detailed Engineering.
  • Project Management.
  • Commissioning and Training.