COFIRING BIOMASS WITH LIGNITE COAL

Schmidt, Darren D.

National Energy Technology Laboratory (U.S.)

关键词: Biomass;    North Dakota;    Charges;    01 Coal, Lignite, And Peat;    Coal;   

DOI  :  10.2172/792072
RP-ID  :  FC26-00NT40900--03
RP-ID  :  FC26-00NT40900
RP-ID  :  792072

美国|英语

来源: UNT Digital Library

【 摘 要 】

The University of North Dakota Energy & Environmental Research Center, in support of the U.S. Department of Energy's (DOE) biomass cofiring program, completed a Phase 1 feasibility study investigating aspects of cofiring lignite coal with biomass relative to utility-scale systems, specifically focusing on a small stoker system located at the North Dakota State Penitentiary (NDSP) in Bismarck, North Dakota. A complete biomass resource assessment was completed, the stoker was redesigned to accept biomass, fuel characterization and fireside modeling tests were performed, and an engineering economic analysis was completed. In general, municipal wood residue was found to be the most viable fuel choice, and the modeling showed that fireside problems would be minimal. Experimental ash deposits from firing 50% biomass were found to be weaker and more friable compared to baseline lignite coal. Experimental sulfur and NO{sub x} emissions were reduced by up to 46%. The direct costs savings to NDSP, from cogeneration and fuel saving, results in a 15- to 20-year payback on a $1,680,000 investment, while the total benefits to the greater community would include reduced landfill burden, alleviation of fees for disposal by local businesses, and additional jobs created both for the stoker system as well as from the savings spread throughout the community.