RECOVERY OF WASTES
The Company of Boscaro brothers in Vigliano Biellese (BI) operates a composting plant, that at a first inspection to registers, processes wastes of up to 85% of the materials consumed in the production - i.e. tons of material whose disposal represented a major cost.
Uniconfort has installed a boiler integrated with two generators at recombined Rankine cycle (ORC). It allows using waste material to heat the working environment, and produce not only electrical energy required for operation of the plant, but also an excess quantity which is sold to Energy Services.
THE BIOMASS BOILER
The plant’s thermal source is constituted of a boiler with a nominal power of 2093 kW/h containing superheated water at 150°C temperature and at a pressure of 12 bars. The boiler has been specially designed to burn fuel as solid as waste by composting.
The boiler operates two turbines of 125 kW each to generate electric power.
Through the district heating network, consisting of 650 meters of pipes, hot water leaving the plant reaches the outlets of company buildings. To optimize the processes, the plant has been designed in a way that hot water outgoing from generators, can be used for drying and preheating the material used as fuel in its cooling cycle, thus improving the yield.
The investment can be amortized within two years due to annual savings resulting from:
- placing the material in landfill;
- the avoided cost of diesel fuel;
And the profit resulting from:
- electricity sold to the grid.
PREVENTION OF CO2 EMISSION
he construction of the cogeneration plant to pro- duce heat and power, means that 140,000 liters of diesel fuel is not burned and, therefore, 1250 tons of CO2 emission is prevented.
- Installed usable power: 2.093 kwt
- Annual consumption of biomass: 8.000 ton
- Length of district heating network: 650 m
- Volume of heated premises: 110.000 m3
- Annual electricity output: 1,760 MW/h Equal to the annual electricity requirements of families
- Prevented CO2 (per year): 1250 ton
- Diesel fuel saved (per year): 140.000 liters