Converting from funnel flow to mass flow Many old coal-fired plants have bunkers and silos with a funnel-flow discharge pattern. Storing PRB coal in such bunkers, which were designed for larger and drier particles of bituminous coal, increases the potential for spontaneous combustion and explosions. Wisconsin Public Service learned this lesson the hard way at its J.P. Pulliam Station as it was testing a blend of bituminous and PRB coal in 1991.

From: Power | Date: October 1, 2003| Author: | Copyright information

Wisconsin Public Service Corp.'s J.P. Pulliam Generating Station in Green Bay currently has six active units with a total capacity of 375 MW. Its first two units were built in 1927 and have been retired. The six units built between 1943 and 1964 are still in service and now collectively burn 1.5 million tons of Powder River Basin (PRB) coal per year, primarily from the North Antelope Mine. Each unit has a Babcock & Wilcox boiler and a turbine-generator from either Allis Chalmers or Westinghouse.

Each of the six boilers at Pulliam is fed by a coal conveyor with a maximum rating of 1,500 ...

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