Pulse-jet baghouse performance improvement with flue gas conditioning

Technical Report · Thu Oct 01 04:00:00 EDT 1992

DOI:https://doi.org/10.2172/6835566· OSTI ID:6835566

Miller, S J; Laudal, D L

A pilot study was conducted at the Energy and Environmental Research Center (EERC) at the University of North Dakota to evaluate the effectiveness of flue gas conditioning in reducing tube sheet pressure drop and fine particulate emissions from a pulse-jet fabric filter. The project was jointly funded by the US Department of Energy (DOE), the Electric Power Research Institute (EPRI), and the Canadian Electrical Association (CEA). The work was completed with EERC facilities consisting of a pulverized coal-fired combustor and pilot baghouse. Full-scale pulse-jet bags were employed under conditions similar to large-scale baghouses. The investigation included baseline tests and tests in which ammonia and SO[sub 3] were, injected upstream of the baghouse to determine the effect of conditioning on baghouse performance. The primary independent variables included coal type, conditioning agent concentrations, air-to-cloth (A/C) ratio, and fabric type. The main dependent variables were particulate emissions, bagbouse pressure drop, and cohesive properties of the fly ash. Results demonstrated significant benefits of using conditioning with a pulse-jet baghouse, including a substantial reduction in particulate emissions and a substantial reduction in pressure drop (or the ability to operate at a higher A/C ratio without increasing pressure drop or bag-cleaning frequency). The improvements in fabric filter performance correlate strongly with a shift in the tensile strength and with increases in the aerated and packed porosity of the fly ash. Conditioning appears to be applicable to a wide range of coals and fabrics. Applications for this technology are where there is a need to reduce pressure drop and/or particulate emissions in existing bagbouses, to reduce fine-particle air toxic emissions which may be required in the future, and for new bagbouse installations to allow operation at a higher A/C ratio while providing an ultrahigh fine-particle collection efficiency.

• Research Organization: North Dakota Univ., Grand Forks, ND (United States). Energy and Environmental Research Center
• Sponsoring Organization: DOE; EPRI; USDOE, Washington, DC (United States); Electric Power Research Inst., Palo Alto, CA (United States)
• DOE Contract Number: FC21-86MC10637
• OSTI ID: 6835566
• Report Number(s): DOE/MC/10637-3312; ON: DE93000252
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
ADDITIVES
ADHESION
AEROSOL WASTES
AMMONIA
ASHES
BAGHOUSES
CHALCOGENIDES
COMBUSTION PRODUCTS
EFFICIENCY
EMISSION
EPRI
EQUIPMENT
FABRIC FILTERS
FILTERS
FLUE GAS
FLY ASH
GASEOUS WASTES
HYDRIDES
HYDROGEN COMPOUNDS
NATIONAL ORGANIZATIONS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PERFORMANCE
POLLUTION CONTROL EQUIPMENT
POROSITY
PRESSURE DROP
RESIDUES
SULFUR COMPOUNDS
SULFUR OXIDES
SULFUR TRIOXIDE
US DOE
US ORGANIZATIONS
WASTES