Screw conveyors sizing data

Compute the required power input to the conveyor. Use the relation hp = 10 6(ALN + CWLF), where hp is hp input to the screw conveyor head shaft A is size factor from step 3 L is conveyor length, in ft N is conveyor r/min C is quantity of material handled, in ft3/h W is density of material, in lb/ft3 F is material factor from step 2. For this conveyor, using the data listed above hp = 10 6(54 x 100 x 60 + 1500 x 40 x 100 x 4.0) = 24.3hp(18.1kW).Witha90percent motor efficiency, the required motor rating would be 24.3/0.90 = 27 hp (20.1 kW). A 30-hp (22.4-kW) motor would be chosen to drive this conveyor. Since this is not an excessive power input, the 6-in (152.4-mm) conveyor is suitable for this application. 

TABLE 6.4. Sizing Data for Screw Conveyors (a) Diameter (rpm and cuft/hr)... 

Screw conveyors, 76,79,80 sizing calculation, 80 sizing data, 79 types of screws, 80 Screw pumps, 134, 141 performance, 148 Segmentation behavior, 305-307 equipment, 319 equipment sketches, 320,338 Segregated flow, 560 volume ratio to CSTR, 561 volume ratio to maximum mixedness, 560... 

FIGURE 15.7 Facility for washing and size reduction of plastic scrap 1, base material feeder 2, shredder 3, conveyor belt to preliminary size reduction 4, separation of coarse matter 5, wet grinder 6, dewatering screw 7, mechanical drier 8, cyclone separator 9, hot-air dryer 10, cyclone separator (to storage). (Data from Herbold, K., Kunstoffe German Plastics, 1989.)... 

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