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The Workhorse of industry: Rotary Dryer Machine

Time:2018年12月06日      Hits:

The Workhorse of industry: Rotary Dryer Machine. Rotary dryer machine is widely used for dry many kinds of different material such as river sand, slag, wood shavings, wood chips, sawdust, chicken manure, slag, fly ash, etc.

Sunco Machinery's range of Rotary Dryers are extensively used throughout the process industries and are highly reliable under the most arduous operating conditions. Noted for their process flexibility and robust construction, their design permits the use of the highest possible drying temperatures and in contrast to other dryers, are not sensitive to wide fluctuations in throughput and product size.

Rotary Dryer, Rotary drum dryer, rotary dryer machine

The directly heated rotary dryer operates on the principle of lifting and showering the product through a hot gas stream moving either in parallel or counter-flow whereas with the indirect dryer, which is more suited to fine and dusty materials, there is little or no contact between the product and the drying gases since they are heated from the outside, via a stationary jacket fitted with either multiple burners or other external heat source.

The efficiency of the dryer is largely dependant on the differential between the inlet and exhaust gas temperatures, although the heat transfer rate is also influenced by the relationship between the design of flights and the speed of rotation. However, irrespective of the gas and material temperatures the drying (or residence) time may be critical, as this is governed by the rate of diffusion of water from the core to the surface of the material.

For greater thermal efficiency and where inertization is required, recycling of exhaust gases can be used. This can be implemented on all our airstream drying systems and retrofitted on customer's existing drying operations.

Rotary Dryer, Rotary drum dryer, rotary dryer machine

Features of the Rotary Drying Machine:

--- Robust construction with various lifter options
--- Can be co-current or counter-current
--- Permits use of higher drying temperatures
--- Relatively long residence time
--- Drum provides dispersion as material is conveyed along the length
Benefits of Rotary Drying Machine:

--- Combines flexibility with reliability resulting in a long service life. The rotary dryer is also suitable for operation with a wide range of materials & particle sizes and can more readily accommodate 'upset' up-stream process conditions
Co-current is suitable for materials with relatively high moistures and provides rapid evaporation without overheating the product. Counter-current has the greatest thermal gradient and helps achieve low product moistures
---Reduces equipment size and the associated capital and operating costs
--- Promotes diffusion drying
--- Relatively low fan power and low headroom
--- Enables energy savings and system integration

The rotary dryer seems very simple, but in fact it is one whole drying system, and the drying system should be designed according to:

--- 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.

When the above information are clear, then Sunco Machinery engineers can calculate and design the suitable and reasonable rotary dryer system for the customers accordingly. 

For more details of rotary dryer, please feel free to contact us:

Email: suncomachinery@hotmail.com

Website: http://www.suncomachinery.com/products/drying/rotary-dryer-01.html

Tel / WhatsApp: +86-158 3821 4261 

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