H4DV-14-C of the nominal output torque the permitted load Helical gear reducers H4

Flender/Flender Gear Units/Helical gear reducers H4

inder with length/diameter ratio generally varying from 4 to 1. The cylinder isinstalled on suitable bearing assembly at small angle (2 to the horizontal. Feed enters at one end of the cylinder that progresses forward by virtue of rotation (4 rpm) and the slope, and the dried product is discharged at the other end. The inside of the rotary dryer is provided with one or more rows of metal tubes, installed longitudinally in theshell, through which steam ows. This kind of indirect dryer is reported to be suitablefor drying cattle feed, brewer grain, parboiled paddy, corn, wheat, and such. The performance of conduction drying with this type of rotary dryer can be improved by the combination of conduction and convection modes of heat transfer. The hot gas in addition to transferring heat by convection also acts as an aid for removal of moisture from the materials. typical rotary dryer has been reported for drying parboiled paddy (. Itcomprises cylindrical shell, 3 ft long and 4 ft in diameter, with 4 pairs of 2-in. and1 1/2-in. (nominal) size steam tubes in two rows inside the shell. These steam pipes are suitable for using up to 5 psig steam in combination with common steam inlet and conden-sation outlet ports. Longitudinal ights are xed at the shell for lifting and forward move-ment of the paddy inside the dryer. While the feed is introduced through hopper with an arrangement of feed rate control mechanism by screw feeder and sliding plate, hot air is blown at the entrance of the feed end breeching box. The rotary shell is rotated at2 rpm by motor through speed regulation gear and pulley, and belt-drive mechanisms. The major advantages of this category of dryers are maintaining the uniformity of drying and for handling high-moisture grains and kernels having tendency to stick to- Grain-Drying Systems 1 gether. However, these types of dryers are more popular for drying chemicals than for agricultural products (. 3.2 Drying by Direct Contact with Heated