Flue gas conditioning for improved particle collection in electrostatic precipitators. Quarterly technical report, October 1--December 31, 1993
The initial pilot-scale testing of two additives was completed at CONSOL`s research coal combustor. The results and conclusions from this test series and subsequent analysis of the data are presented in this report. Table 1 summarizes the conditions tested. During the tests, the research combustor was firing a medium-sulfur coal. The combustor had recently been retrofitted with low-NOx burners for a DOE Clean Coal test program. Operation of the low-NOx burners required a reduced flow rate in the combustor, resulting in lower flow and velocity in the ESP. A comprehensive baseline condition was tested, followed by initial screening runs for several additives. It was discovered that the flyash exhibited properties characteristic of a high-resistivity ash. In-situ measurements at the ESP inlet confirmed that the resistivity was in the 10{sup 10} -- 10{sup 12} ohm-cm range. In addition, the ESP plate rappers were not able to remove ash buildup on the first section during normal operation. Power off rapping was periodically required to fully clean the plates; this is a clear indication of high-resistivity conditions. Since the major benefit of ESP additives will be to reduce reentrainment at low to midrange resistivity, this operating condition was undesirable for performance testing. It was decided to continue the program with SO{sub 3} conditioning of the flue gas to reduce particle resistivity. It was also decided to operate with two rather than three electrical fields energized. By reducing the ESP collection area, it was hoped that it would be easier to measure changes in ESP performance and to see an immediate indication of the effectiveness Of SO{sub 3} conditioning. The ESP was reconfigured with two electrical sections energized and SO{sub 3} conditioning at a rate of approximately 20 ppM. An additional baseline was run, followed by extended tests with two additives referred to in this report as Additive ``C`` and Additive ``D.``
- Research Organization:
- ADA Technologies, Inc., Englewood, CO (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-91PC90364
- OSTI ID:
- 10143836
- Report Number(s):
- DOE/PC/90364-T8; ADA-4300-93-Q4; ON: DE94010255; BR: AA0505000
- Resource Relation:
- Other Information: PBD: 12 Jan 1994
- 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
PARTICULATES
AIR POLLUTION CONTROL
ELECTROSTATIC PRECIPITATORS
EFFICIENCY
PERFORMANCE TESTING
NITROGEN OXIDES
FOSSIL-FUEL POWER PLANTS
FLUE GAS
ADDITIVES
PROGRESS REPORT
BURNERS
FLY ASH
ELECTRIC CONDUCTIVITY
SULFUR TRIOXIDE
PARTICLE SIZE
200202
NOXIOUS GAS AND PARTICULATE EMISSIONS