Filtration properties of fly ash from fluidized bed combustion

Journal Article · Sun Nov 01 04:00:00 EST 1987 · J. Air Pollut. Control Assoc.; (United States)

DOI:https://doi.org/10.1080/08940630.1987.10466323· OSTI ID:5410205

Bush, P V; Snyder, T R; Smith, W B

Some of the features of the fluidized-bed combustion (FBC) process have a direct bearing on the particulate properties that most strongly influence filtering pressure drop. A laboratory program was conducted to experimentally determine the relative pressure drop characteristics of ashes from the TVA-EPRI 20-MW bubbling bed, atmospheric pressure FBC (AFBC) pilot plant and six pulverized-coal combustion (PC) units. The combined influences of measured particle and dust cake properties on filtering pressure drop were estimated with existing filtration theories. These theories predict a higher pressure drop for a dust cake produced with the AFBC ash than one consisting of any of the PC ashes. Laboratory measurements were made of the flow resistance of idealized, simulated dust cakes to confirm these predictions. Field operating data from the fabric filters collecting some of the tested ashes were available to validate the laboratory results. The laboratory and field data show relatively good agreement. The AFBC ash must be treated as a special case for fabric filters, and careful selection of cleaning method and fabric must be made to minimize the inherently high pressure drop characteristics of this ash.

• Research Organization: Southern Research Institute, Birmingham, AL (USA)
• OSTI ID: 5410205
• Journal Information: J. Air Pollut. Control Assoc.; (United States), Journal Name: J. Air Pollut. Control Assoc.; (United States) Vol. 37:11; ISSN JPCAA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOL WASTES
AIR POLLUTION CONTROL
ASHES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
CONTROL
ENERGY SOURCES
FABRIC FILTERS
FILTERS
FILTRATION
FLUIDIZED-BED COMBUSTION
FLY ASH
FOSSIL FUELS
FUELS
MATERIALS
OXIDATION
PARTICLES
PARTICULATES
PHYSICAL PROPERTIES
POLLUTION CONTROL
PRESSURE DROP
RESIDUES
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
WASTES