Direct Rotary Dryer and Indirect steam-tube dryer
Rotary dryers are one of the most common types of industrial dryer,
utilised for large quantities of material with particles of size 10
mm or larger. Typical rotary dryer consist of cylindrical shell
made of steel plates slightly inclined (1O to 5O) to horizontal to
assist the transportation of the wet material fed for the
processing, shell is typically 0.3-5 m in diameter, 5-90 m in
length and rotating at 1-8. Rotary dryer shell tube acts as body to
transfer the wet feedstock and number of steam heated tubes are
placed symmetrically around the perimeter and rotate with it. Wet
material is fed into the upper end of dryer and the material
travels through it by virtue of rotation and slope of the shell and
dried product is picked as the lower end. The feed rate, speed of
rotation of shell, the volume of heated air or gases, and their
temperature are so regulated such that by the time material reaches
to discharge point of rotary dryer it’s accurately dried.
Rotary dryer performs due role in complete drying process, 1) as a
conveyor, carrying/ moving material from feed end to discharge end
2) as heating/ drying device. Movement of material within the dryer
is influenced by the lifting, cascade action, sliding and bouncing.
Hengyang has helped more than hundreds of accurately designed and
crafted rotary drying solution varying in size dimension and drying
capability. Till dates we have delivered the rotary dryers for
approximately for all possible type of industrial application,
catering to such large diverse need of industry we have built the
rotary system of many types for both batch type rotary drying as
well as continuous type rotary drying applications. The key
classification of rotary dryers are as follows:
Direct Rotary Dryer
Direct rotary kiln
Indirect steam-tube dryer
Indirect rotary calciner
The efficiency is significantly enhanced by insertion of
longitudinal plates inside the cylinder these are known as lifting
flights. Their purpose of the lifting flights is to lift and shower
the solid particles through the gas stream where the air is hottest
and minimum moisture is hold. The edge of the lifter can be bend
inward or right angle for uniformly processing the material.
Typical flight arrangement are as shown below.
Features of Rotary Dryer:
Hengyang build the rotary dryer are having robust construction.
Hengyang provide rotary dryer with various lifter options based
material.
Hengyang provides the option of either co-current or
counter-current air circulating rotary dryer.
Rotary dryer designed by Hengyang can be utilised for higher
temperature drying.
We design and build rotary dryer with wide range of size and
dimensions to handle wide range of material.
We provide fully automated rotary dryers by means of PLC systems.
Rotary dryers are suitable of continuous drying operation.
This type of dryer provide relatively longer residence time.
