Co-firing switchgrass in a 50 MW pulverized coal boiler

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:478627

Ragland, K W; Aerts, D J ^[1]; Weiss, C ^[2]

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1. Univ. of Wiconsin, Madison, WI (United States)
2. Madison Gas and Electric Co., Madison, WI (United States)

Switchgrass is being co-fired with pulverized coal in a 50 MW wall-fired, radiant boiler at MG&E`s Blount Street generating station. Shredded switchgrass is fed to a hammermill onto a live bottom storage bunker. Twin screw augers move the switchgrass onto a belt conveyor which leads to a rotary air lock valve and through a pressurized pipe to the boiler where it is injected into the furnace at two points between first and second level coal burners. The main objective of the project is to evaluate the boiler performance, slagging behavior, and emissions of the co-fired switchgrass at replacement of rates of up to 20% by mass (13% by heat input). Initial co-firing tests to examine fuel handling and feeding, combustion behavior, boiler response and emissions are favorable. In November a 100 hour co-fire test is planned.

• OSTI ID: 478627
• Report Number(s): CONF-960958--
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
COAL FINES
COCOMBUSTION
PERFORMANCE TESTING
PLANTS
POWER RANGE 10-100 MW