Production of RDF Parona | Pavia
Lomellina Energia SrlParona | Pavia - Italy
- System description: Production of RDF - Refuse Derived Fuel
- Waste processed: Mixed municipal solid waste
- Plant capacity: 200,000 t/year
The fuel production sub-system in the Lomellina Energia plant is designed to obtain a material with controlled size. This part of the plant includes two identical
lines; one is used for operations, while the second is on stand-by. Each line is equipped with a secondary shredder fed by a conveyor belt. An electromagnet is placed upstream from the shredder for the removal of possible ferrous residues. The shredder is a hammer type of mill, with a high-speed horizontal rotor. The
hammers, which can rotate freely around the pivots set up around the rotor disks, reduce the size of the RDF. A grate located at the outlet controls product size. Each shredder is set up in a bunker with reinforced concrete walls and is equipped with a vent that releases any overpressure generated inside the shredder.
Vibrations and temperature of the shredders’ bearings are monitored, as well as the temperature of the motors’ windings.
A dust control system also helps to keep the shredder grate free. Air-tightness is ensured at the shredder-unloading conveyors by rotating devices designed by
Ecomaster. The material treated by the shredders is collected by conveyor belts with in-line magnetic separators at the end; this is a further sign of the attention paid in this project to the removal of metals from RDF. The fuel is sent through conveyor belts to the storage building, where it is piled through a shuttle belt.
A sophisticated feeding system is used to send the fuel to the fluidized-bed steam generator, consisting of two lines, one of which is on stand-by. Each line
is equipped with a horizontal feeding conveyor, fed by wheel loader, and with a set of conveyors that bring the material to the steam generator distributor and
take back the excess material to the storage building.