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Libroplantasingl

LIGHT WEIGHT PACKAGING SORTING PLANTS 50-51 To specify in greater detail the main equipment needed in each of these stages, the standard processes corresponding to the various capacities are described below, comparing each group of operations according to the various standards. The last point shows a full block diagram of each of the standards.   Reception and storage of packaging waste input in the plant At the main access to the plant the vehicles that bring in waste and those leaving the plant with by-products are subjected to weighing and control in scales in the reception area. After the transport vehicles are weighed they enter the reception area. The standard storage system for packaging waste is the unload yard. The unload yard must have a minimum capacity equivalent to that needed to store the amount of material collected in two days. Considering that the input material stored in the unload yard must not exceed 3m in height and 15% of the surface must remain free to allow the loading shovel to manoeuvre, the surfaces calculated for each standard are shown in Table 7: Minimum surface area for standard unload yards. Table 7 Design regime (t/h) Yard surface (m²) 2 262 3 410 4 536 5 660 6 784 7 907 8 1,030 Pre-treatment The waste storage and conditioning stage must have the necessary means for achieving its goals, as indicated below: • Waste feeder / doser. • Primary sorting cabin. • Bag opening system. • Trommel (except in 3 t/h sorting plants). • Ballistic separator. The arrangement of these means depends on the capacity of the facility. For manual plants this stage does not include the ballistic separation equipment, as manual sorting is performed using trommel overflow and underflow collected in sorting belts. The standard block diagrams according to the design capacity of the facilities are shown below:


Libroplantasingl
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