Effect of paste water content on APFBC plant efficiency

Conference · Wed Jun 01 04:00:00 EDT 1994

OSTI ID:10155470

Robertson, A ^[1]; Domeracki, W ^[2]; Horazak, ^[3]; Newby, R ^[4]; Rehmat, A ^[5]

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1. Foster Wheeler Development Corp., Livingston, NJ (United States)
2. Westinghouse Electric Corp., Orlando, FL (United States). Power Generation Business Group
3. Gilbert/Commonwealth, Green Hills, PA (United States)
4. Westinghouse Electric Corp., Pittsburgh, PA (United States). Science and Technology Center
5. Institute of Gas Technology, Chicago, IL (United States)

In the search for a more efficient, less costly, and more environmentally responsible method for generating electrical power from coal, research and development has turned to advanced pressurized fluidized bed combustion (PFBC) and coal gasification technologies. A logical extension of this work is the second-generation PFBC plant, which incorporates key components of each of these technologies. In this new type of plant, coal is devolatilized/carbonized before it is injected into the PFB combustor bed, and the low-Btu fuel gas produced by this process is burned in a gas turbine topping combustor. By integrating coal carbonization with PFB coal/char combustion, gas turbine inlet temperatures of 1260{degrees}C (2300{degrees}F) and higher can be achieved. When operated with a dry coal-fed 871{degrees}C (1600{degrees}F) carbonizer and integrated with a conventional 16.5-MPa gage/538{degrees}C/538{degrees}C/8.5-kPa Hg (2400-psig/1000{degrees}F/1000{degrees}F/2.5-in. Hg) steam cycle, a plant electrical generating efficiency of 46.2 percent is predicted. Despite a loss in plant efficiency, first-generation PFB plants have been built with coal/water paste fuel systems because they offer advantages of simplicity and lower capital costs. The performance of second-generation PFB plants operating with coal paste water contents of 25 and 30 percent are presented in the paper.

• Research Organization: Foster Wheeler Development Corp., Livingston, NJ (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC21-86MC21023
• OSTI ID: 10155470
• Report Number(s): DOE/MC/21023--94/C0340; CONF-9405124--3; ON: DE94012760; BR: AA1510050/AA3510100
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010409
014000
20 FOSSIL-FUELED POWER PLANTS
200102
CARBONIZATION
COAL
COAL GASIFICATION
COMBINED-CYCLE POWER PLANTS
COMBUSTION
CONCENTRATION RATIO
COST
ELECTRIC POWER
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FUEL FEEDING SYSTEMS
FUEL SLURRIES
GAS TURBINES
LOW BTU GAS
POWER CYCLES
PRESSURIZATION
PYROLYSIS AND CARBONIZATION
STEAM TURBINES
WATER