Skip to content
TEC Square
  • Applications
    • Instant Coffee
      Instant Coffee
      Extraction
      • Flexible
        Extraction
      Concentration
      • Aroma
        Recovery
      • Low-Impact
        Thermal Concentration
      • High-TS
        Concentration
      • Engineered
        Osmosis
      Drying: Instant Coffee
      • High-TS
        Spray Drying
      • In-line
        Agglomeration
      CIP
      • Coffee CIP and
        Waste-water
    • Cold Brew
      Cold Brew
      Extraction: Cold Brew Extract
      • Continuous
        Extraction
      • High-Yield
        Batch Extraction
      Concentration: B2B Cold Brew Concentrate
      • Engineered
        Osmosis
      • Low-Impact
        Thermal Concentration
    • Dairy
      Milk Powder
      Wet processing
      • High-Efficient
        Milk Reception
      • 7-in-1
        Processing
      Spray Drying: Milk Powder
      • In-line
        High Concentrator
      • Lecithin
        Dosing
      Infant Formula
      Wet processing
      • High-Efficient
        Milk Reception
      • 7-in-1
        Processing
      Spray Drying: Infant Formula
      • In-line
        High Concentrator
      • Vacuum
        Mixing
      • Lecithin
        Dosing
      CIP
      • Dairy CIP and
        Waste-water
    • Non-Dairy Creamer
      Non-Dairy Creamer
      Spray Drying: Non-Dairy Creamer
      • In-line
        High Concentrator
      • Vacuum
        mixing
      • Lecithin
        Dosing
    • Vegan Milk
      Soy Milk & Other Vegan Milks
      Extraction: Vegan Milk
      • Continuous
        Extraction
    • Fruit Juice
      Fruit Juice
      Extraction: Fruit Juice
      • Continuous
        Extraction
      Concentration: B2B Fruit Juice Concentrate
      • Low-Impact
        Thermal Concentration
      • Aroma
        Recovery
  • Equipment
    • Pasteurizer
    • Spray Dryer
    • Rototherm
      • Rototherm-E
      • Rototherm-P
      • Rototherm-D
    • Evaporator-Stripper
    • Roaster
  • Services
    • Process Engineering
    • Mechanical Engineering
    • Electrical Engineering
    • Automation and Control
    • Project Management
    • App Programming
      • Mobile Process Control
      • Mobile Data Capturing
  • About Us
    • Values
    • Our Team
    • Partners
    • Careers
  • Articles
  • Contact Us
  • English
  • Español
Home / Equipment / Rototherm / Rototherm-D

Rototherm

Rototherm-D

The Artisan Rototherm-D is a specialized slow-speed dryer, designed for continuous vacuum drying or post-drying of free-flowing solid materials. The Rototherm-D is a jacketed, mechanically-agitated dryer, that continuously removes moisture or solvents from powders and bulk solids under vacuum. It is especially useful for diffusion-limited drying applications where long residence times are required.

Rototherm-D operating principle

The Feed, being moist powder or bulk solids, enters into the Rototherm-D at one end. The horizontal shell and the specially designed rotor are heated by water, steam, or hot oil. The low speed helical mixing bars agitate the product continuously, while gently churning and continuously conveying it to the discharge end of the dryer in a plug flow manner.

Vacuum minimizes drying temperature and avoids thermal degradation of heat sensitive materials. An adjustable weir at the discharge end keeps the product level in the dryer between 25% and 75% full.

Adjusting the height of the weir or changing the feed rate will allow to control the residence time. The dry product discharge is collected either by batch in a sealed vessel or continuously after passing through a vacuum lock vessel.

Process Benefits

The Rototherm-D offers the following benefits over batch dryers:
  • Low temperature and shear reduce product degradation
  • Continuous process eliminates variations in product quality between batches
  • High heat transfer area-to-volume ratio
  • Adjustable drying time from 20 minutes to several hours

Applications

The Rototherm-D has various fields of application
  • Drying heat sensitive powders and bulk solids
  • Drying shear sensitive powders and bulk solids
  • Diffusion controlled drying applications
  • Further dewatering readily dried sludges and press-cakes
  • Sublimation of powders
  • Solid state polymerization/polycondensation
The Rototherm-D is a product in development by Artisan. If you have an application that you believe would benefit from Rototherm-D’s operating principles, then our product development team would be happy to work with you to incorporate this technology into your projects.

Download our Brochure

Download the Artisan Rototherm-D Brochure

TEC Square is the representative in Europe and Asia for

Contact us
TEC Square Project Management SL
TEC Square SL

Calle Sebastian Souviron 18, Atico 2
29005 Malaga
Spain
Tel: +34 (664) 389873

TEC Square BV
TEC Square Electrical BV

De Biestraat 18
4751 HC Oud Gastel
The Netherlands
Tel: +34 (664) 389873

TEC Square Solutions Inc.

Zuellig Avenue, NRA
Mandaue City, Cebu,
The Philippines, 6014
Tel: +63 (32) 5205899

  • © TEC Square Project Management SL
  • Privacy Policy and Cookies
  • General Terms and Conditions
Linkedin