Cement, Energy and Environment

The software calculates all the relevant data required for the bucket eleva tor system, including the motor power to run the handling system. Conclusion From the softwa re solution, the power requirement for the proposed bucket elevator system to transport 300 tons / hr raw meal from the vertical roller mill to the storage silo through a height of 90 meters is calculated to be 78.99 kW and the motor power required is 99.77 kW. This is only 1/Sth of the power required for the existing pneumatic system. Other advantages of the bucket elevator system are: Nomenclature BCAP = Bucket elevator capacity m VEL H PIT BHT BUW BTB BBB BPT TDD TDL BL litres = Belt velocity in m/sec = Lifting height, m = Bucket pitch, m = Bucket height, m = Bucket width, m = Bucket top breadth, m = Bucket bottom breadth, m = Bucket plate thickness, m = Top drum diameter, m = Top drum lengfh, m = Belt length, m )..- It requires less investment compared to N = No. of buckets pneumatic system, MTI = Material transported in one belt revolution, tons ;.... It is suitable for even moist and sticky materials, and :Y There is no limitation on the height over which to be conveyed The software developed can indeed be effectively used in any industry for designing a bucket elevator material handling system, if the following inputs can be given: (i) Bucket elevator capacity required in tons/hr, (ii) Conveying material density in tons/m 3 (iii) Height to which to be lifted in meters and (iv) Bucket material density in kg/ m 3 References 1. 2. 3. 4. Perry H John, Chemical Engineer's Handbook, First edition 1980. Materials handling handbook, Second edition, 1984. Mechnaical Engineers Handbook, Third edition, 1987. PSG Design Data book, Latest edition. NBR = No. of belt revolutions/hr ODRD = NDRBR = vz = SR = BWPM BW = Displacement for one drum rev, m Number of drums, rev./belt rev Shaft speed, rpm Speed reduction ratio Belt weight/ m Belt width, m BT = Belt thickness, m = Belt weight, kg BWT BUWT TBWT = MWT = TSL = MLP = FOP MPWM = DWMP = Bucket weight, kg Total buckets weight, kg Material weight, kg Top shaft load, kg Material lifting power, kW Power to overcome friction, kW Moving parts weight,/length, kg/m Power for moving dead weights Total power, kW TP MP MBM TSD = Motor power, kW = Maximum bending moment = Top shaft diameter, m