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Advanced Fluidized Bed Waste Heat Recovery Systems
Abstract
The U.S. Department of Energy, Office of
Industrial Programs, has sponsored the
development of a Fluidized Bed Waste Heat
Recovery System (FBWHRS) and a higher
temperature variant, the Ceramic Tubular
Distributor Plate (CTDP) Fluidized Bed Heat
Exchanger (FBHX) system. Both systems recover
energy from high-temperature flue gases and
produce steam. In a one-year evaluation test on
an aluminum remelt furnace, the FBWHRS generated
about 26 million lb of saturated steam at 150
psig. Before entering the FBWHRS, the flue
gases were diluted to 1100°F to protect the
fluidized bed distributor plate. In a second
project, this FBWHRS concept was further
developed by replacing the metallic distributor
plate with a Ceramic Tubular Distributor Plate
(CTDP), a closely spaced row of alumina rods.
The ceramic unit permitted energy from flue
gases to be recovered without diluting gases.
Elimination of the air diluent system reduced
the FBHX fluidized bed volume by 70% and
increased heat recovery by 30%. Both systems
offer several advantages. The fluidized bed
particles enhance heat transfer and continually
clean the finned tubes in the fluidized beds.
Also, only the distributor plate is exposed to
the hot fouling and corrosive flue gases since
the fluidized bed quickly cools these gases to a
uniform 500°F.
Subject
Fluidized Bed Waste Heat Recovery System (FBWHRS)Ceramic Tubular Distributor Plate (CTDP) Fluidized Bed Heat Exchanger (FBHX) System
Collections
Citation
Peterson, G. R. (1988). Advanced Fluidized Bed Waste Heat Recovery Systems. Energy Systems Laboratory (http://esl.eslwin.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /92380.