Integrated coal preparation and CWF processing plant: Conceptual design and costing. Final technical report

Technical Report · Tue Dec 01 04:00:00 EST 1992

DOI:https://doi.org/10.2172/10136430· OSTI ID:10136430

McHale, E T; Paul, A D; Bartis, J T ^[1]; Korkmaz, M ^[2]

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1. Science Applications International Corp., McLean, VA (United States)
2. Roberts and Schaefer Co., Salt Lake City, UT (United States)

At the request of the US Department of Energy (DOE), Pittsburgh Energy Technology Center, a study was conducted to provide DOE with a reliable, documented estimate of the cost of producing coal-water fuel (CWF). The approach to the project was to specify a plant capacity and location, identify and analyze a suitable coal, and develop a conceptual design for an integrated coal preparation and CWF processing plant. Using this information, a definitive costing study was then conducted, on the basis of which an economic and sensitivity analysis was performed utilizing a financial evaluation model to determine a price for CWF in 1992. The design output of the integrated plant is 200 tons of coal (dry basis) per hour. Operating at a capacity factor of 83 percent, the baseline design yields approximately 1.5 million tons per year of coal on a dry basis. This is approximately equivalent to the fuel required to continuously generate 500 MW of electric power. The CWF produced by the plant is intended as a replacement for heavy oil or gas in electric utility and large industrial boilers. The particle size distribution, particularly the top size, and the ash content of the coal in the CWF are specified at significantly lower levels than is commonly found in typical pulverized coal grinds. The particle top size is 125 microns (vs typically 300m{mu} for pulverized coal) and the coal ash content is 3.8 percent. The lower top size is intended to promote complete carbon burnout at less derating in boilers that are not designed for coal firing. The reduced mineral matter content will produce ash of very fine particle size during combustion, which leads to less impaction and reduced fouling of tubes in convective passages.

• Research Organization: Burns and Roe Services Corp., Pittsburgh, PA (United States); Science Applications International Corp., McLean, VA (United States); Roberts and Schaefer Co., Salt Lake City, UT (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-89PC88400
• OSTI ID: 10136430
• Report Number(s): DOE/PC/88400--T2; ON: DE93011026
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300
ADDITIVES
ASH CONTENT
COAL
COAL PREPARATION
COAL PREPARATION PLANTS
COST ESTIMATION
DESIGN
ECONOMIC ANALYSIS
ENERGY CONSUMPTION
FLOTATION
FUEL SLURRIES
GRINDING
MIXTURES
PREPARATION
PROGRESS REPORT
WATER