DuPont, Brevard NC Facility
128 Ton/Day Fluidized Bed Alternate Fuels Boiler
(Scrap X-Ray Film, Industrial Plastics, Shipping Containers and Plant Waste)
70,000 pph, 175 psi, Saturated Steam
Owner
E.I. du Pont de Nemours and Company
Project Location
Brevard, North Carolina
Project Completion
February 1991
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Project Description
This facility converts industrial waste materials and nonrecycleable by-products into
usable energy in the form of process steam. Waste plastics are received on-site in
cardboard drums or on pallets. The material
is bulk shredded into fuel pieces typically less than three inches in size. Particle
sizing is maintained through the use of a disc screen with over sized material recycled
back to the shredder. Prepared fuel is stored in dual 30,000 cubic feet storage bins for
delivery to the metering bins. Fuel is metered into the fluidized bed combustor both
over-bed and in-bed. An "A" type boiler is positioned on top of the fluidized
bed combustion cell and is followed by an economizer and baghouse for particulate
collection. SO2 and NOx pollutants are controlled with limestone and ammonia injection in
the fluidized bed combustor.
The boiler provides 70,000 lbs/hr of 175 psi saturated process steam for the adjacent
x-ray film manufacturing facility which, in turn, provides the waste fuels. The on-site
fluidized bed boiler system allows DuPont to handle it's own waste stream, reducing
landfill costs and liability as well as conserving energy. From an emissions point of
view, the new "alternative fuels boiler" generates less emissions firing waste
fuels than the older fossil fuel fired boilers it replaced.
Scope of Supply
EPI acted as the turnkey contractor for this facility. In addition to design, engineering
and construction, EPI supported the initial project development effort by performing
scoping pilot plant tests on various fuels and assisting in permitting of the plant. Upon
completion of the startup phase, EPI entered into an extended contract for plant operation
and maintenance.
