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Directly heated rotary drum dryer

Author : dongding Date : 2012-7-24 10:13:52
Conventional direct-heated rotary drum dryers dry material and hot air in direct contact to the convective heat drying. Between hot air and the material flow direction, into and-flow and counterflow. And streaming, the dryer air outlet temperature should generally be higher than the material outlet temperature 10 ~ 20 ℃ in a counter-flow air outlet temperature is not clearly defined, but designed with a more reasonable 100 ° C outlet temperature. The cylinder diameter is generally 0.4 ~ 3 m, the cylinder length and cylinder diameter ratio is generally between 4 and 10. The circumferential speed of the dryer for 0.4 ~ 0.6m / s, the air speed of 1.5 ~ 2.5m / s within.

Directly heated rotary drum dryer heating source, feeder, feeder, rotary drum, a feeder, Fan, unloading and distribution cabinet composition; wet material after dehydration by adding dryer the turning of the roller cloth copy board, the material in the dryer dispersed full contact with the hot air to speed up the drying heat transfer, mass transfer. During the drying process, the material with a tilt of the copy of the role of the board and hot temperament, star of another section to the dryer discharge valve discharge products.
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