Abstract
The Electricity Supply Board of Ireland has been using peat-fired boilers for electricity generation for over 15 years. Peat is produced in two forms—sod and milled. Sod peat is burned on chain-grate stokers in boilers of up to 20 MW capacity; milled peat is fired as pulverized fuel in boilers of up to 40 MW capacity. Total peat-fired plant is 407 MW. Production methods for sod and milled peat are outlined. The paper describes the combustion technique adopted for these two fuel forms and the special maintenance and operational difficulties experienced over the years. The influence of peat characteristics on boiler design and the salient differences compared with coal and oil-fired boilers are explained. Details are given of performance and cost figures compared with coal and oil-fired plants.
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