Difference between revisions of "Cascading Rotary Dryers"

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The '''Cascading Rotary Dryers''' have the feed materials pass through a rotating  cylinder together with a stream of hot gas. Internal lifters  or  flights elevate the feed and drop it in a curtain from the top to the  bottom  cascading along the length of the dryer. Flights need to be  carefully designed  to prevent asymmetry of the curtain. Material moves  from one end of the dryer to  the other by the motion of the material  falling due to the angle of inclination  of the drum. Some rotary  dryers are double and triple pass units where each drum  is nested  inside the previous drum.
Granular free flowing wet feed material is made to shower repeatedly in a    cascade manner in a stream of hot air, when moisture gets transferred to the    air, rendering the product progressively dry as it travels the length of the    dryer cylinder provided with suitable lifters. The humid air is exhausted    via a dust collection system to trap any fines escaping with the exhaust air.

Revision as of 08:24, 27 July 2012


The Cascading Rotary Dryers have the feed materials pass through a rotating cylinder together with a stream of hot gas. Internal lifters or flights elevate the feed and drop it in a curtain from the top to the bottom cascading along the length of the dryer. Flights need to be carefully designed to prevent asymmetry of the curtain. Material moves from one end of the dryer to the other by the motion of the material falling due to the angle of inclination of the drum. Some rotary dryers are double and triple pass units where each drum is nested inside the previous drum. Granular free flowing wet feed material is made to shower repeatedly in a cascade manner in a stream of hot air, when moisture gets transferred to the air, rendering the product progressively dry as it travels the length of the dryer cylinder provided with suitable lifters. The humid air is exhausted via a dust collection system to trap any fines escaping with the exhaust air.