The beet and cane sugar factories all utilise power generation systems (known as combined heat and power, CHP that produces both steam and electricity. The plants use either renewable or fossil fuel (bagasse, coal, oil or gas) to produce steam at high pressure in water tube boilers.This high pressure steam is then used to drive turbo-alternators which generate electricity to power the sugar factory. In many cases electricity is also sold to the local grid network.It show water tube steam boiler used in sugar factory and play a vital role in industry processing.
Having generated electricity, the resultant lower pressure steam is then used many times over in the sugar production process in highly integrated and efficient evaporators.
Across the company portfolio approximately 48% of the fuel is derived from renewable sources (i.e. cane bagasse), and 25% is from natural gas, the cleanest fossil fuel. On average, about 80% of the energy in the fuel is put to beneficial use, which compares to 30-50% for conventional power stations.
At several of our factories, more electricity is generated than the factory requires and the excess is sold to local electricity supply companies. This electricity produces lower carbon emissions per unit of energy than conventional fossil fired power stations. This principle is taken furthest in the UK, where a high performance combined cycle gas turbine has been installed at each of the Bury St Edmunds and Wissington CHP plants. The gas turbines produce about 45MW of electricity and heat to raise steam in the boilers..