Direct-indirect heating drying furnace machine

This dryer is more economical than direct dryer and it may be used for materials that are dry at high temperatures using a steam tube. For example, hot air with a temperature of 1200 to 1400 leaves it and enters a loop-shaped space and is in contact with solid matter and leaves it at a temperature of 140 to 180 degrees. Raw coal is generally dried in this way without being ignited or its dust explodes. The
approximate diameter of this dryer is only 3 to 10 (ft.) and its lengths vary from 2 to 100 ft.

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