Conical paddle dryer

The conical paddle dryer is Hosokawa’s newest drying technology. The unique paddle design of the vertical, centrally-driven dryer combines extremely fast drying rates with a compact design. It is a universal vacuum dryer that has been developed to enable vacuum, atmospheric and pressurised processing of a variety of materials such as powders, filter cakes, pastes and viscous slurries, especially when they are brittle and/or heat sensitive.


The thermal energy needed for drying is introduced into the product through a heated jacket that can be heated by various media including steam, hot oil and water. The jacket provides rapid distribution of heat into the product in combination with efficient mixing.

Conical paddle dryer

The vacuum inside the dryer allows vapour to be removed at low temperatures, which makes the conical paddle dryer ideal for drying heat-sensitive products. The vapours are removed through a dust filter fitted on top of the vessel. This then prevents the dust from penetrating into the vacuum system.

The conical paddle dryer is fitted with a condenser with a receptacle for recovering solvents. This condenser can be installed before the vacuum pump, or after it, depending on the characteristics of the solvents.

The moisture content of the product can be controlled by monitoring the weight of condensate or using the Hosokawa Sampler for taking samples from the product inside the dryer under vacuum.

The conical paddle dryer is designed for vacuum drying of solid based materials, but can be used in a wide range of other applications requiring thermal processing or vacuum treatment of solids, such as:

  • Chemical reactions: alkalisation, solid-gas reactions
  • Crystallisation
  • Wet agglomeration and granulation of solids
  • Sterilisation of products
  • Homogenising under vacuum
  • Cooling of solids and liquids
  • De-aeration of pastes and liquids

This combination of several processes in one vessel offers tremendous savings on investment costs, labour and space.

 

  • Multi-purpose and multi-processing
  • Efficient batch drying of loose powders to heavy filter cakes and viscous liquids
  • Compact design
  • Batch volumes ranging from 5 to 15,000 litres
  • Extremely fast drying
  • Full compliance with international standards (FDA, cGMP, EHEDG)
  • Automated cleaning solutions with our patented CIP filter and CIP skids
  • Sterile processing (SIP) possible


Our conical paddle dryers can be custom made in sizes ranging from 5 litres up to more than 22 m³ but we also have specific designs for applications in secondary pharmaceuticals, bulk pharmaceuticals, fine chemicals, and the food, metals and nuclear industries. They are designed and built according to industry standards such as Stoomwezen, PED, TÜV, Lloyd's, ASME, Afnor, ISPLE etc. and are available in all grades of stainless steel, Monel, nickel, titanium, Hastelloy, etc.

Laboratory & Pilot vacuum dryers

Our laboratory & pilot vacuum dryers are small vacuum drying systems that have been specially developed for use in laboratories. They are multi-purpose systems for wide-ranging applications.

The complete systems, including all of the necessary ancillaries, are built on stainless steel skids with wheels. They are very suitable for process development activities, experimental purposes and for fine-tuning for optimal process parameters. The laboratory dryers are available from 5 litres to 20 litres and the pilot dryers from 40 to 120 litres.

Bespoke systems

Our expert design and engineering team would happily work with you on a tailor-made design for any of our dryers or drying systems.


Our expert design and engineering team would happily help you specify the right ancillary equipment to compliment the conical paddle dryer. These ancillaries may include:

  • Vacuum filter
  • Sampler
  • Heating / cooling skid
  • Ball segment outlet valve
  • Lump breaker
  • Controls
  • CIP / SIP skid

How can we help you?

Contact us at +31 314 373 333 or fill out our contact form.

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