Rotary Dryer

A Rotary Dryer is a machine that removes moisture from materials like minerals, grains, chemicals, and waste. It uses a large, rotating drum where the material tumbles and gets exposed to hot air. The hot air dries the material quickly as it moves through the drum. Rotary Dryers can be used for small tasks or large industrial processes, making them very versatile and efficient.

How It Works:

  1. Material Feeding: The wet material is introduced into the rotary drum through a feeding system.
  2. Rotating Drum: The drum rotates slowly, lifting and tumbling the material as it moves through the dryer.
  3. Hot Air Flow: Heated air is passed through the drum, either in the same direction as the material (co-current flow) or in the opposite direction (counter-current flow).
  4. Heat Transfer: The hot air evaporates moisture from the material, while the tumbling action ensures uniform drying.
  5. Discharge: The dried material exits the drum and is collected for further use.
  6. Exhaust Air Management: The moist air is filtered and safely discharged from the system.

Key Features and Benefits:

  • Versatile: Suitable for drying a wide range of materials, including bulk solids and fine powders.
  • High Capacity: Can handle large volumes of material, making it ideal for industrial applications.
  • Energy Efficient: Optimized heat transfer reduces energy consumption.
  • Durable Design: Built to withstand continuous operation and harsh conditions.
  • Customizable: Can be tailored to specific drying needs, such as temperature control and drum size.
  • Low Maintenance: Simple structure and reliable operation minimize maintenance costs.

 

Applications:

  • Agriculture: Drying grains, corn, and other crops before storage or processing.
  • Mining: Reducing moisture in minerals and ores for easier handling.
  • Chemical Industry: Drying pigments, fertilizers, and specialty chemicals.
  • Waste Management: Processing sludge and waste materials into dry solids.

 

Material of Construction: SS 304 / SS 316 / MS / As per client needs

Process Flow for Rotary Dryer System

Material Feeding → (Wet material is introduced into the rotary drum through a
controlled feeding system)

Rotating Drum Mechanism → (Drum rotates slowly, lifting and tumbling the
material for consistent drying)

Hot Air Flow
Co-Current Flow → (Hot air moves in the same direction as the material)
Counter-Current Flow → (Hot air flows opposite to the material, optimizing heat
transfer)

Heat Transfer Process → (Moisture evaporates as material is exposed to heated air)

Discharge System → (Dried product exits the drum and is collected for further use)

Exhaust Air Management → (Filtered moist air is safely discharged from the
system)

Key Equipment Involved

Feed Conveyor / Hopper (Regulates material entry into the dryer)

Rotary Drum Dryer (Core unit where drying occurs with tumbling action)

Hot Air Generator (Provides controlled heat for moisture evaporation)

Blower System (Ensures continuous airflow for efficient drying)

Cyclone Separator / Bag Filter (Captures dried particles and manages dust
control)

Exhaust System (Filters and safely discharges moisture-laden air)

Final Collection Bins (Stores dried material for packaging or further use)