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What is a rotary drum dryer ?

Time:2018年12月07日      Hits:

Rotary drum dryer also is named rotary drying machine, rotary cylinder dryer, rotary drying machines which is widely used in the industrial drying field. 

A rotary dryer, or rotary drum dryer, is a slightly inclined rotating horizontal cylinder that uses a supply of heat to continuously dry a solid material. As the drum/Cylinder rotates, wet solids are fed into the inlet end and slowly make their way to the discharge end. The inside of the drum dryer includes flights designed to lift and/or mix the material inside. This helps promote heat transfer efficiency in the material.

What is a rotary drum dryer , rotary dryer, drum drying machine

The heat energy for drying is supplied in two basic ways.

The first is by heating air or gases and blowing them directly into the drum where they come in contact with the wet material. This type of drum is called a direct-fired rotary dryer and the hot gas stream either flows in the same direction as the material moving through the drum (co-current flow) or opposite to the material movement (counter-current flow).


What is a rotary drum dryer , rotary dryer, drum drying machine



The second method of heat delivery is by heating the shell of the drum and is called an indirect-fired dryer. This is done using jacket heaters (steam jacketed, etc.) or by encasing the rotating drum in a furnace. Either way, the atmosphere inside the drum is controlled, protecting the material from certain gases.

What is a rotary drum dryer , rotary dryer, drum drying machine

Rotary drum dryers are chosen by industry for their dependability and low cost. Not only are they rugged, but they are also a reliable method for producing consistent product when feedstock may vary. In addition, rotary drum dryers allow for zones within the drum to perform multiple processes. For example, a single rotary drum may include a zone for drying and a later zone for classifying.

Typical Materials Dried in a Rotary Drum Dryer
--- Fertilizers
--- Aggregates
--- Biomass - Wood Chips, Energy Crops, and Other Materials
--- Minerals - Sands, Clays, and Other Minerals
--- Sewage Sludge
--- Animal Feeds - Cereal Grains, High Protein, Wastes, and By-Products
--- Foods - Cereals, Fruits and Vegetables, Starches, and more

If you are in need of rotary drum dryer for drying wet material, please supply more of your requirement informations as follows:

--- The features of raw material, for example the wet sand has surface water which is easier to be dried, but the wood chips has inner water which is more difficult to be dried. 

--- Initial moisture content(%) of the wet material. 

--- Output moisture content(%) the dried material needed.  

--- Bulk density (kg per cubic meter) of the wet material. 

--- Input capacity (ton per hour). 

--- Output capacity(ton per hour).  

--- Fuel Choice such as coal, waste wood, natural gas, diesel, etc. 

--- End use of the dried product.

--- Plastics - Pellets, Resin, PET, Waste
--- Powders - Pigments, Chemicals, Powdered Foods, STarches

What is a rotary drum dryer , rotary dryer, drum drying machine


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