Coal Powder Rotary Dryer Machine For Wood / Sawdust / Crop Straw
1. Introduction of coal powder rotary dryers
coal powder rotary dryers is suitable for drying materials from
moisture 20%-60% to 6%-8%. It is consist of hot air stove,inlet,
steel buffer cylinders pipe, exhaust fan,air lock and cyclone
1. It is widely used for drying the powdery,laminar materials like
wood sawdust, crop straw,grain stalks etc.
2. It is specially suitable for drying the starch,albumen powder
from food such as corn,potato etc.
3. It is also for drying the granular and spiny materials in
chemical products, medicine and biomass industry.
Working theory of coal powder rotary dryers Wet materials are input
into the hopper. It uses the varying diameters of branch segments
of pulse tube and continual change of air flow speed to constantly
thrash the material for drying.The fuel boiler generates hot air
which mixes with wet materials and then is sucked into the pipes by
the exhaust blower (fan) quickly. And then hot air is flowing and
going though the curving pipes and buffer (drying chamber) of
dryer, thus wet materials is finished to dry, and the dried
materials are discharged from the outlet with air lock.
2. Features of coal powder rotary dryers
1. As the raw material particles are suspended in the hot air
stream, the heat transfer between the hot air and particle is
rapid. That ensures efficient moisture removal, even with a short
transfer time of 3-5 seconds
2. Once the moisture hot air and particles reach the cyclone
separator, the particles leave the through the base and moist hot
air leaves through the top of the cyclone.The buffer cylinders are
to increase particle resonance time in the hot air stream.
3. The dryer usually uses coal, firewood and gas as heating
source.Combustible gas as the heating resource can save labor 75%.
4. it not only reduces the labor intensity but also can reuse the
3. Technical parameters of coal powder rotary dryers
Raw materials diameter
<3mm &< 5mm
heating air temperature
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