Flue gas conditioning for improved particle collection in electrostatic precipitators
By injecting high concentrations of SO[sub 3] (80 to 100 ppM) it was possible to reduce the particle resistivity from 10[sup 11] to 10[sup 7] ohm-cm. However, it was very difficult to consistently obtain intermediate levels of resistivity. This was because of the steep relationships between gas phase SO[sub 3] and resistivity. It only takes a few ppM of SO[sub 3] to provide an order of magnitude change in resistivity. This is demonstrated by the curves in Figure 2. The water dew point for a gas stream with a moisture content of 10%, which is typical of coal fired boilers, is approximately 120[degrees]F. However, in a flue gas with only 2 ppM of SO[sub 3], sulfuric acid will begin to condense at 270[degrees]F. The effect of the rapid rise in acid dew point is reflected by the corresponding rapid decrease in resistivity. With no gas phase SO[sub 3] present the resistivity is in the high 10[sup 11] ohm-cm range. However with only 10 ppM of SO[sub 3], the resistivity drops three orders of magnitude. Therefore, intermediate levels of resistivity can only be obtained by controlling the SO[sub 3] concentration within 1 or 2 ppM.
- Research Organization:
- ADA Technologies, Inc., Englewood, CO (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-91PC90364
- OSTI ID:
- 7045559
- Report Number(s):
- DOE/PC/90364-T4; ON: DE93008094
- Country of Publication:
- United States
- Language:
- English
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Flue gas conditioning for improved particle collection in electrostatic precipitators. Quarterly technical progress report, October 1--December 31, 1992
Flue gas conditioning for improved particle collection in electrostatic precipitators
Related Subjects
ADDITIVES
PERFORMANCE TESTING
ELECTROSTATIC PRECIPITATORS
EFFICIENCY
FLUE GAS
FLY ASH
ELECTRIC CONDUCTIVITY
ATOMIZATION
CATALYSTS
ENTRAINMENT
FOSSIL-FUEL POWER PLANTS
OXIDATION
PROGRESS REPORT
QUANTITY RATIO
SULFUR DIOXIDE
SULFUR TRIOXIDE
AEROSOL WASTES
ASHES
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION PRODUCTS
DOCUMENT TYPES
ELECTRICAL PROPERTIES
EQUIPMENT
GASEOUS WASTES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
RESIDUES
SULFUR COMPOUNDS
SULFUR OXIDES
TESTING
THERMAL POWER PLANTS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions