Integrated dry NO{sub x}/SO{sub 2} emissions control system low-NO{sub x} combustion system retrofit test report. Test report, August 6--October 29, 1992
- Fossil Energy Research Corp., Laguna Hills, CA (United States)
- Public Service Co. of Colorado, Denver, CO (United States)
The DOE sponsored Integrated Dry NO{sub x}/SO{sub 2} Emissions Control System program, which is a Clean Coal Technology M demonstration, is being conducted by Public Service Company of Colorado. The test site is Arapahoe Generating Station Unit 4, which is a 100 MWe, down-fired utility boiler burning a low-sulfur Western coal. The project goal is to demonstrate up to 70 percent reductions in NO{sub x} and SO{sub 2} emissions through the integration of: (1) down-fired low-NO{sub x} burners with overfire air; (2) Selective NonCatalytic Reduction (SNCR) for additional NO{sub x} removal; and (3) dry sorbent injection and duct humidification for SO{sub 2} removal. The effectiveness of the integrated system on a high-sulfur coal will also be investigated. This report documents the third phase of the test program, where the performance of the retrofit low-NO{sub x} combustion system is compared to that of the original combustion system. This third test phase was comprised of an optimization of the operating conditions and settings for the burners and overfire air ports, followed by an investigation of the performance of the low-NO{sub x} combustion system as a function of various operating parameters. These parameters included boiler load, excess air level, overfire air flow rate and number of mills in service. In addition, emissions under normal load following operation were compared to those collected during the optimization and parametric performance tests under baseloaded conditions. The low-NO{sub x} combustion system retrofit resulted in NO{sub x} reductions of 63 to 69 percent, depending on boiler load. The majority of the NO{sub x} reduction was obtained with the low-NO{sub x} burners, as it was shown that the overfire air system provided little additional NO{sub x} reduction for a fixed excess air level. CO emissions and flyash carbon levels did not increase as a result of the retrofit.
- Research Organization:
- Fossil Energy Research Corp., Laguna Hills, CA (United States); Public Service Co. of Colorado, Denver, CO (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FC22-91PC90550
- OSTI ID:
- 10163642
- Report Number(s):
- DOE/PC/90550-T12; ON: DE94014532; BR: AZ0502070
- Resource Relation:
- Other Information: PBD: Jun 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FOSSIL-FUEL POWER PLANTS
AIR POLLUTION CONTROL
NITROGEN OXIDES
SULFUR DIOXIDE
COMBINED SOXNOX PROCESSES
US CLEAN COAL TECHNOLOGY PROGRAM
DEMONSTRATION PROGRAMS
BURNERS
STAGED COMBUSTION
SORBENT INJECTION PROCESSES
FUEL-AIR RATIO
RETROFITTING
DESIGN
200202
NOXIOUS GAS AND PARTICULATE EMISSIONS