The rotary dryer

The rotary dryer

The rotary dryer is a blazon of automated dryer active to abate or abbreviate the aqueous damp agreeable of the actual it is administration by bringing it into absolute acquaintance with a acrimonious gas.

The dryer is fabricated up of a large, alternating annular tube, usually accurate by accurate columns or animate beams. The dryer slopes hardly so that the acquittal end is lower than the actual augment end in adjustment to aback the actual through the dryer beneath gravity. 

Material to be broiled enters the dryer, and as the dryer rotates, the actual is aerial up by a alternation of centralized fins lining the close bank of the dryer. Back the actual gets aerial abundant to cycle aback off the fins, it avalanche aback bottomward to the basal of the dryer, casual through the hot gas beck as it falls. This gas beck can either be affective against the acquittal end from the augment end (known as co-current flow), or against the augment end from the acquittal end (known as counter-current flow).

The gas beck can be fabricated up of a admixture of air and agitation gases from a burner, in which case the dryer is alleged a absolute acrimonious dryer. Alternatively, the gas beck may abide of air or addition (sometimes inert) gas that is preheated. Back the gas beck is preheated by some agency area burner agitation gases do not access the dryer, the dryer accepted as an indirect-heated type.

Often, aberrant acrimonious dryers are acclimated back artefact contagion is a concern. In some cases, a aggregate of direct-indirect acrimonious rotary dryers are additionally accessible to advance the all-embracing efficiency.