An On-Site Process for Removing Moisture from Low-RanK Coal

摘要

Lower-than-design heating value of delivered coal can result in higher fuel flow rate, higher flue gas flow rate, higher station service power, lower plant efficiency and higher mill and coal pipe/burner operations and maintenance costs, plus a host of lesser effects. Commissioned in 1979 and 1981, Coal Creek Station near Underwood, N.D. includes two 600 MWg mine-mouth, lignite-fired natural circulation units with tangentially-fired, dual-furnace boilers with eight pulverizers each. Both units were installed with wet scrubbers as original equipment. Great River Energy, an electric cooperative owned by 28 members and serving 1.7 million customers in Minnesota and Wisconsin, owns and operates Coal Creek, as well as nine other power plants with a total output of more than 2,500 MW. Fuel for Coal Creek is provided by North American Coal Corp.'s Falkirk Mine near the plant.