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

  • Steam Tube Dryer System
  • Rotary shell type
  • Fixed shell type
  • Rotary Dryer system ( Cascade | Louver)
  • Paddle Dryer system
  • Agitated Thin Film Dryer (ATFD)
  • Vacuum Dryer (RVPD | DCVD)
  • Flash Dryer system (CPD |SFD)
  • Spray Dryer System
  • Belt Dryer system

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.

Advantages:

  • Conduction type, indirect drying
  • Suitable for free flowing granular feeds.
  • High thermal efficiency
  • Minimal process air flow
  • Relatively low emissions
  • Adaptability to fluctuating feed rates & moisture contents of products

Applications:

  • Germ / Fiber
  • DDGS / Spent Grains
  • Agro products | Herbal extracted Waste
  • Tea & Coffee Waste
  • Fly Ash | Oats | Salt Crystals

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.

Advantages:

  • Suitable for free flowing granular feeds.
  • Intimate contact with hot air ensure uniform drying.
  • Quick plant start-up and adjustment of operating conditions.
  • High Thermal efficiency with continuous drying.
  • Low power demand.

Applications:

  • Refused derived fuel (RDF) | Bagasse | Agro waste
  • Sodium & Ammonium sulphate | Ferrous Sulfate
  • Sugar | Oxalic & Boric Acid | KHCO3 | Calcium chloride
  • Coal | Gypsum | Sand | Granulated Fertilizer
  • Inorganics | Crystals | Iron Ore

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.

Advantages:

  • Indirect (Conduction Type) Dryer System.
  • High filling ratio: HTA used effectively | High evaporation rate | Adequate residence time.
  • Wedge-shaped paddles to optimize heat transfer.
  • Vacuum Drying for heat-sensitive materials.
  • Potential to use high temperature for effective drying.
  • Proper lifters/shovels for better heat transfer.
  • Continuous Operation | Compact Installation.

Applications:

  • ETP & Biological Sludge | Sewage Sludge
  • Pasty & Crystalline solids
  • Agro waste | Fluorspar
  • Nylon granules | Zink & Magnesium carbonate

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.

Advantages:

  • Thin Film Configuration promotes rapid drying
  • Continuous Operation.
  • Uniform Agitation & even distribution of material.
  • High Thermal Efficiency.
  • Suitable for heat-sensitive materials and a wide range of feedstock.
  • Precise control over drying conditions and product moisture content.
  • Space-efficient layout for easy integration into existing processes.

Applications:

  • Liquid food | Concentrate effluent from MEE | Liquid Chemicals | Pesticides
  • Dye & Pigments | Pharma ingredients & intermediates | Enzymes | Proteins

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.

Advantages:

  • Suitable for drying materials which are heat sensitive, as low temperature for drying can be maintained by high vacuum
  • Lowest energy consumption compared to any other batch type dryer due to higher differential temperatures
  • Higher Thermal Efficiency
  • Higher recovery of solvents

Applications:

  • Heat sensitive products
  • Polymers & solvent recovery
  • Insecticides
  • Pesticides

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.

Advantages:

  • Suitable for drying dewatered solids, Wet Powders, Cake or Paste
  • High Heat Transfer coefficient & Thermal efficiency
  • Quick plant start-up and adjustment of operating conditions
  • Excellent choice for processing heat-sensitive or easily oxidized feed materials
  • Continuous operation & Uniform product
  • Quick response to operational changes

Applications:

  • Dye Intermediates | Pigment
  • Starch | Gluten | Spent Malt
  • Boric Acid | Citric Acid | Zink carbonate
  • Inorganic Salts | Silica | Acetoacetanilide
  • Polymer Beads | Iron oxide | Drug Intermediates
  • NH4HF2 | MgOH2 | NH4Cl | NaHCO3 | CaCO3

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.

Advantages:

  • Best product quality
  • Hygienic design
  • Low energy consumption
  • Easy switch over to a different product
  • Long operation time between cleaning
  • Heat sensitive

Applications:

  • Food: milk powder, coffee, tea, eggs, cereal, starch and starch derivatives, vitamins, enzymes, stevia, colourings
  • Pharmaceutical: antibiotics, medical ingredients, additives
  • Industrial: paint pigments, ceramic materials, catalyst supports, microalgae
  • Detergents
  • Spent wash

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.

Advantages:

  • Suitable for granular, fibrous, preformed, extruded wet materials.
  • Can handle wet material with both surface and bound moisture.
  • Uniform drying
  • High energy efficient
  • Low power consumption
  • Continuous operation

Applications:

  • Alumina
  • Agro products
  • Pigments
  • Charcoal
  • China clay
  • Magnesium carbonate
  • Zeolites

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.
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Head Office

  • A/1108, Mahaavir icon, Plot 89, Sector 15, CBD Belapur, Navi Mumbai 400614

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  • Unit 204, I-Thum Tower B. Sector - 62, Gautam Budha Nagar Nodia, UP - 201301, India

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About Us

Industry

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Core Sectors

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Head Office

  • A/1108, Mahaavir icon, Plot 89, Sector 15, CBD Belapur, Navi Mumbai 400614

North Office

  • Unit 204, I-Thum Tower B. Sector - 62, Gautam Budha Nagar Nodia, UP - 201301, India

Need Support

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