Rotary Dryer

Petrosadid: Rotary Dryer

PETROSADID Company backed by long history and experiences can offers you a highly customizable solution for drying bulk solids such as a robust and reliable ROTARY DRYER.

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What follows gives you a brief overview of Rotary Drum Dryer:

Rotary dryers are a robust, reliable industrial drying system.

Rotary dryers are a critical component in many industrial processes, capable of processing all sorts of materials, from chemicals and fertilizers, to minerals and ores, and nearly everything in between.

While rotary dryers should be customized to yield optimal processing conditions, the basis of a rotary dryer is often somewhat standard.

The following information offers an explanation on some of the standard components of a rotary dryer, as well as available customizations.

What follows gives you an overview of rotary dryer's components:

Petrosadid: Rotary Dryer
Petrosadid: Rotary Dryer

Dryer Shell

The shell of the dryer can be made from a variety of materials, including: Carbon Steel, Stainless Steel, Hastelloy, Inconel, And other Alloys.

The dryer shell can be customized in many ways, depending on the process and material needs. For example, shell thickness can be adjusted to improve heat retention.

A properly constructed shell is of the utmost importance. The shell must run true and concentric in order to maintain process efficiency and be reliable for years to come.

A poorly manufactured shell will promote wear on all components, reducing efficiency, and often resulting in premature failure.

The Combustion Chamber

The combustion chamber is where the actual combustion reaction occurs. From here, the drying air is directed through the drum. A variety of combustion chambers are available, with various customizations available as well.


The burner determines the output of BTU’s/Watts.

Burners can be designed to accommodate a variety of fuel sources, such as: Natural Gas, Propane, Diesel and more…

Raw Material Feed

Also called the feed chute, this is where raw material feedstock is fed into the dryer. This is typically carried out using a feed chute or screw.

Feed chutes must be designed to be robust, resistant to wear, and to reduce the potential for material build-up.

Air Seal

The seal connects the discharge breeching to the rotating drum in order to keep air and material from prematurely exiting the drum. A variety of seal types are available.

Drive Assembly

The drive assembly is what causes the drum to rotate. Various options are available depending on the horsepower and size of the drum. Options include:

Chain and Sprocket, Gear and Pinion, Friction Drive, Direct Drive

Riding Ring

The riding ring is part of the support structure for the drum and provides a place for pressure to be absorbed.

Thrust Rollers

Thrust rollers push up on the riding ring to prevent the drum from moving horizontally, or “drifting.”

Trunnion Wheels

The trunnion wheels serve as the cradle for the rotating drum, helping to ensure smooth and concentric rotation.

Trunnion wheels also serve as a wear piece, since they are more cost-effective to replace than the riding ring itself.


Flights, also called material lifters, maximize heat transfer between the material and the drying air.

Flights pick up the material and drop it through the air stream as the drum rotates.

Both flight design and pattern are customizable.

Discharge Breeching

The discharge breeching is where product exits the dryer, and the exhaust gas system removes off-gases and small particulates.

Advancing Flights

Advancing flights help to advance material into the drum. They help to prevent build-up near the inlet.

Knocking Systems

Knocking systems are used to prevent build-up within the drum.

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