Dryers

Vapco engineers supplies engineering services and complete process plants and components for drying of products to customers in the industries of distillery, food and dairy, chemicals, pharmaceuticals and environmental protection. Drying is one of the most widely used unit operation in the processing industries. Vapco offer a range of dryers for handling fluid, paste, and moist powder, particulate and granulate feeds.

Range of dryer systems

  • Rotary shell type
  • Fixed shell type

Steam Tube Dryer

Principle of Operation:

  • The material is fed continuously at uniform rate and is tumbled & showered by rotation of cylinder.
  • In a stream of hot air, when moisture gets transferred to the air, rendering the product progressively dry as it travels the length of the dryer
  • The humid air is exhausted into atmosphere via a dust collection system to trap fines escaping with the exhaust air.

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Rotary Dryer System (CASCADE | LOUVER)

Principle of Operation:

  • Drying, roasting or heat treatment is achieved by passing the material being processed through a rotating cylinder through which also passes a current of hot air.
  • Lifters or flights fitted to the internal surface of the cylinder lift and cascade the material through the hot air stream.
  • The air stream can be directed through the cylinder either co-current or counter-current manner.

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Paddle Dryer

Principle of Operation:

  • Paddle Dryer are highly efficient, mechanically agitated, indirect heat transfer devices that add or remove heat from a process mass.
  • Dual counter-rotating shafts with unique intermeshing wedge shape paddles produce intimate mixing and optimize heat transfer.
  • The use of hollow paddles for heat transfer results in a compact machine. The heat transfer medium: steam, oil, thermal fluid, water, or glycol is isolated from the process mass.

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Agitated Thin Film Dryer (ATFD)

Principle of Operation:

  • The Agitated Thin Film Dryer (ATFD) spreads wet materials into a thin film over a heated surface, where rotating blades ensure uniform agitation and heat transfer.
  • Moisture evaporates rapidly through conduction and convection, while the design facilitates continuous removal of evaporated moisture.
  • The dried product is then discharged, achieving the desired moisture content efficiently.
  • This system is ideal for heat-sensitive materials, delivering high thermal efficiency and consistent performance.

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Vaccum Dryer ( RVPD | DCVD)

Principle of Operation:

  • Rotary Vacum Dryer (RVD) is a batch type, cylindrical jacketed vassel with a cylindrical jacketed vessel with a central agitator having specially designed blades.
  • The blades of this Rotary Vacuum Paddle Dryer (RVPD) are so designed that they sweep the entire internal surface and at the same time turn the material so that all the particles are in contact with the heated surface.
  • A vacuum Pump of adequate capacity is provided & fitted to the receiver of these rotary vacuum dryers to create the vacuum in the dryer shell through the Receiver, Condenser and dust catcher.

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Flash Dryer

Principle of Operation:

  • In the flash dryer, particles are dispersed by different means depending on the product into a hot air stream at high velocity conveying and drying the product to a free flowing powder in a very short time.
  • This design uses suspended particle drying techniques where surface moisture of the material is rapidly removed by dispersing the particulate solids in a heated stream of gas / air.
  • The drying economy is very dependent upon the source of energy and the maximum allowable inlet temperatures.

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Spray Dryers

Principle of Operation:

  • Spray drying involves the atomization of a liquid feedstock into a spray of droplets and contacting the droplets with hot air in a drying chamber.
  • The sprays are produced by either rotary (wheel) or nozzle atomizers. Evaporation of moisture from the droplets and formation of dry particles proceed under controlled temperature and airflow conditions.
  • Powder is discharged continuously from the drying chamber. Operating conditions and dryer design are selected according to the drying characteristics of the product and powder specification.

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Belt Dryer

Principle of Operation:

  • Hot air is passed through the moving porous bed of the wet material.
  • The moisture is transferred from the wet particles to the hot air. The material becomes progressively dry as it traverses along the length of the belt dryer.
  • The humid air is exhausted via ID fan.

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VAPCO provides complete solutions ranging from engineering services to lumpsum suppliers

For entire plant, stand alone packages, part systems, upgradation & debottlenecking of existing plants as per client’s requirements.