Economics of co-firing waste materials in an advanced pressurized fluidized-bed combustor Page: 4 of 15
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ECONOMICS OF CO-FIRING WASTE MATERIALS IN AN ADVANCED
PRESSURIZED FLUIDIZED-BED COMBUSTOR
Donald L Bonk
Heather M. McDaniel
U.S. Department of Energy
Morgantown Energy Technology Center
Morgantown, West Virginia
Michael R. DeLallo Jr.
Roman Zaharchuk
Gilbert/Commonwealth, Inc.
Reading, PennsylvaniaABSTRACT
The co-firing of waste materials with coal in
utility scale power plants has emerged as an effective
approach to produce energy and manage municipal
waste. Leading this approach is the atmospheric
fluidized bed combustor (AFBC). It has demon-
strated its commercial acceptance in the utility
market as a reliable source of power by burning a
variety of waste and alternative fuels. The fluidized
bed, with its stability of combustion, reduces the
amount of thermochemical transients and provides
for easier process control. The application of pres-
surized fluidized-bed combustor (PFBC) technology,
although relatively new, can provide significant
enhancements to the efficient production of
electricity while maintaining the waste management
benefits of AFBC.
A study was undertaken to investigate the
technical and economic feasibility of co-firing a PFBC
with coal and municipal and industrial wastes. Focus
was placed on the production of electricity and the
efficient disposal of wastes for application in central
power station and distributed locations. Issues
concerning waste material preparation and feed,
PFBC operation, plant emissions, and regulations are
addressed. The results and conclusions developed
are generally applicable to current and advanced
PFBC design concepts.
Wastes considered for co-firing include
municipal solid waste (MSW), tire derived fuel
(TDF), sewage sludge and industrial de-inkingsludge. Conceptual designs of three power plants
rated at 250 MWe, 150 MWe and 4 MWe were
developed. The 4 MWe facility was chosen to
represent a distributed power source for a remote
location and designated to co-fire coal with MSW,
TDF and sewage sludge while producing electricity
for a small town. Heat and material balances were
completed for each plant and costs determined
including capital costs, operating costs and cost of
electricity.
With the PFBCs operation at high temperature
and pressure, efforts were centered on defining
feeding systems capable of operating at these
conditions. Since PFBCs have not been tested
co-firing wastes, other critical performance factors
were addressed and recommendations were provided
for resolving potential technical issues. Air emissions
and solid wastes were characterized to assess the
environmental performance comparing them to state
and federal regulations. This paper describes the
results of this investigation, presents conclusions on
the key issues, and provides recommendations for
further evaluation.
OBJECTIVES
A study has been undertaken to investigate the
technical and economic feasibility of co-firing a PFBC
with coal and municipal or industrial wastes. Focus
was placed on the production of electricity and the
efficient disposal of wastes for application in a central
power station and distributed locations. Wastes
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Bonk, Donald L.; McDaniel, Heather M.; DeLallo, Michael R., Jr. & Zaharchuk, Roman. Economics of co-firing waste materials in an advanced pressurized fluidized-bed combustor, article, April 1, 1995; Morgantown, West Virginia. (https://digital.library.unt.edu/ark:/67531/metadc676818/m1/4/: accessed March 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.