Page 95

Libroplantasingl

GLOSSARY OF EQUIPMENT 94-95 › Facilitating passage of materials to be sifted: The efficacy of this operation increases if the alignments of the orifices are perpendicular to the movement-falling of the materials. In the trommels, because the unit turns, the movement-fall is perpendicular to the shaft, such that the orifice alignments need to be parallel to said shaft. › The alignments allow installing fins to prevent obstruction of threadlike elements, reducing the maintenance time required for the unit. • Installed power. The trommel power in a package sorting plant is determined by several factors, such as the rotation speed, capacity, length, etc. In package waste processing plants, the trommels have an installed power of 11-18.5 kW. • Capacity. The capacity of the trommel depends on its dimensions and can range from 55 m³/h to 208 m³/h, which based on a package density of 70 kg/m3 represents 3.8 t/h to 14.56 t/h. • Collection chute slope. Due to the variety of packaging material it is not possible to measure the various factors involved quantitatively, so empirical methods have been used to determine the chute slopes on which there are no obvious accumulations of material preventing the normal operation of a trommel. The slopes found for the chute walls with respect to the horizontal based on the package materials guided are as follows: › For passing material, with wet organic matter: 70° › For passing material without wet organic matter: 60° › For non-passing materials: 60° • Rotation speed. The speed of a standard trommel for package plants is from 9 to 10 r.p.m. for diameters from 3.0 to 2.5 m. • Bag opening systems in the trommel. In addition to the bag opener unit, the trommel can also be used to open the bags. These systems involve installing inside the blind ferrule at the inlet to the trommel, after the insertion fins, an area with pointed triangular steel parts approximately 20 cm in height and 8 cm at the base (in the form of spikes or knives), welded or screwed perpendicularly to the ferrule. 3 2. Bulky material mesh. 3. Fine material mesh. LIGHT WEIGHT PACKAGING SORTING PLANTS


Libroplantasingl
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