The Power Plant
The layout of the power plant, and each of its key areas, are described below.
- Waste Wood Storage Area: Waste wood is transported to the Plant by road and stored within the Waste Wood Storage Area until it is transferred to the Waste Wood Processing Building. Approximately 270,000 tonnes of wood is delivered to the Plant each year.
- Waste Wood Processing Building: Waste wood is processed within the Waste Wood Processing Building to remove non-combustible material (such as metal) and produce woodchip. This woodchip is transferred by conveyor to the Woodchip Storage Building.
- Woodchip Storage Building: The Woodchip Storage Building stores the woodchip prior to being transferred by conveyor to the Power Island. The Woodchip Storage Building can hold enough woodchip to fuel the Plant for around four days operation, although the actual quantity of fuel stored will fluctuate from day to day.
- Power Island: Woodchip is transferred from the Woodchip Storage Building to the Power Island where it is combusted within a single travelling grate boiler under tightly controlled conditions, to produce high pressure steam. This steam passes through a single steam turbine to generate electricity. Exhaust gases generated from the combustion process pass to the Emissions Control Area.
- Emissions Control Area: Emissions from the Plant are rigorously controlled and monitored to ensure they meet the strict emission limits. Emissions control technology used at the Plant includes Selective Non-Catalytic Reduction (SNCR), fabric filters and dry lime and activated carbon injection. Exhaust gasses are discharged via a 100 m high stack and are continuously monitored.
- 132 kV Electricity Substation: Electricity generated by the Plant is transferred by underground cable to the Plant’s 132 kV Electricity Substation and subsequently along a 4.5 km underground cable to the existing 132 kV substation at Tilbury. From here, the electricity enters the local electricity distribution network. UK Power Networks, the local electricity distribution network operator is responsible for the construction of the 132 kV Electricity Substation and underground cable.
- Ecological Habitat Areas: Ecological Habitat Areas will be developed by TGP to promote habitat creation and diversity. A range of habitat and landscaping features will be developed including planting of native, ornamental and nectar-rich trees and shrubs and the establishment of bird boxes, bat boxes, a bat shelter and reptile shelters.