FEECO Direct Rotary Dryers

We’ve built a reputation on building the best rotary dryers in the industry. All of our dryers are custom designed to suit the unique processing needs of your material. Whether you require low or high inlet temperatures, short or long residence times, counter current or co-current flow, FEECO’s design team can design a rotary drum dryer for your application.

 

Rotary dryers are a highly efficient industrial drying option for bulk solids. They are often chosen for their robust processing capabilities and their ability to produce uniform results despite variance in feedstock.

 

Rotary dryers work by tumbling material in a rotating drum in the presence of a drying air. They can also be indirectly heated to avoid direct contact between the material and processing medium.

 

The drum is positioned at a slight horizontal slope to allow gravity to assist in moving material through the drum. As the drum rotates, lifting flights pick up the material and drop it through the air stream in order to maximize heat transfer efficiency. When working with agglomerates, the tumbling action imparted by the dryer offers the added benefit of further rounding and polishing the granules.

Direct Rotary Dryer Features

  • Diameter: 3′ – 15′
  • Capacity: 1 TPH – 200 TPH
  • Specially designed lifting flights to maximize heat transfer between the material and hot gas stream
  • Heavy duty design and construction for many years of service
  • Process and Mechanical Warranties
  • Various Drive Assemblies Available

 

Optional Components

  • Knocking Systems
  • Trommel Screen
  • Liners
  • Leaf Seals
  • Graphite Seals
  • Machined Bases
  • Screw Conveyor Feeder
  • Automatic Gear Lubrication System
  • Exhaust Handling Equipment
  • Ductwork

Material Options

  • Carbon Steel
  • Stainless Steel
  • Specialty Alloys
  • Explosion Bonded
  • AR Steel

Accommodates Various Fuel Types

  • Fuel Oil
  • Natural Gas/Propane
  • Waste Heat
  • Biogas

 

We can offer cost competitive designs for pilot scale units that process as little as one ton per hour to heavy duty units in excess of 17 foot in diameter that process hundreds of tons per hour.

 
Automated with Rockwell Automation

All FEECO equipment and process systems can be outfitted with the latest in automation controls from Rockwell Automation. The unique combination of proprietary Rockwell Automation controls and software, combined with our extensive experience in process design and enhancements with hundreds of materials provides an unparalleled experience for customers seeking innovative process solutions and equipment.

Learn more >>

Direct Rotary Dryer Construction

The image below shows the standard components of a rotary dryer. Click image to view larger.

  • A – Burner
  • B – Combustion Chamber
  • C – Raw Material Feed Chute
  • D – Riding Ring/Tire
  • E – Gear/Sprocket Guard
  • F – Flights
  • G – Exhaust Handling System
  • H – Discharge Breeching
  • I – Product Discharge
  • J – Drive Assembly
  • K – Drum Shell Riding Ring
  • L – Graphite Block Lubrication Assembly
  • M – Trunnion Wheel
  • N – Trunnion Guard
  • O – Pillow Block Bearing
    • P – Thrust Roller Assembly
    • Q – Coupling Guard
    • R – Gear Reducer
    • S – Pinion Gear
    • T – Girth Gear
For more detailed component descriptions, see the Rotary Dryer Parts and Components Glossary.

Direct Rotary Dryer Applications & Materials

Rotary dryers are known as the workhorse of industrial dryers. They are able to process a wide variety of materials, and can lend a hand in nearly any industry requiring industrial drying solutions. Some of the most common industries and materials in which rotary dryers are employed include:

  • Municipal Waste & Sludge
  • Organic Chemicals
  • Paper Sludge
  • Plastic Pellets & Grains
  • Potash
  • Reclaimed Dust
  • Rubber Pellets
  • Salts & Sugars
  • Sand
  • Steel Mill Waste Sludges
  • Urea Prills & Crystals

Indirect Rotary Dryers

Unlike direct dryers, indirect dryers do not rely on direct contact between the material and process gas to dry the material. Instead, the rotating drum is enclosed in a furnace, which is externally heated. Contact with the heated drum shell is what dries the material.

 

While indirect dryers are less efficient compared to their direct counterparts, they offer some advantages that can make them an attractive alternative. This includes:

  • Less exhaust air treatment
  • No risk of entrainment of fine materials
  • Precise temperature control along the length of the dryer can be achieved

Indirect Dryer Features

  • Diameter: 3′ – 15′
  • Capacity: 1 TPH – 200 TPH
  • Heavy duty design and construction for many years of service
  • Process and Mechanical Warranties
  • Various Drive Assemblies Available

Optional Components

  • Knocking Systems
  • Trommel Screen
  • Liners
  • Machined Bases
  • Screw Conveyor Feeder
  • Automatic Gear Lubrication System
  • Exhaust Handling Equipment
  • Various Burner Configurations
  • Ductwork
  • Various Seal Options

Material Options

  • Carbon Steel
  • Stainless Steel
  • Specialty Alloys
  • Explosion Bonded
  • AR Steel

Accommodates Various Fuel Types

  • Fuel Oil
  • Natural Gas/Propane
  • Electricity
  • Waste Heat
  • Biogas

 

Indirect Dryer Construction

The image below shows the standard components of an indirect rotary dryer. Click image to view larger.

  • A – Material Inlet
  • B – Gear/Sprocket Guard
  • C – Riding Ring
  • D – Furnace
  • E – Exhaust Vent(s)
  • F – Air Seal
  • G – Spring/Leaf Seal
  • H – Seal Mounting Flange
  • I – Seal Wear Surface
  • J – Discharge Breeching
  • K – Gas and Air Piping
  • L – Burners
  • M – Advancing Flights
  • N – Inlet Breeching

Rotary Dryer Project Profiles

Rotary Dryer Photos



 

Rotary Dryer Articles

Why Choose FEECO?

Our rotary dryers are built to the highest quality standards, with longevity in mind. The best part about buying a FEECO rotary dryer, is that you get the security of knowing your equipment is backed by over 60 years of experience, material and process knowledge, and a proven track record.


Our Commitment to Quality
Quality-RibbonOur company was founded on the idea that we could do things better; that if we put our minds to it, we could produce the best in industrial processing equipment.