Coal reburning for cyclone boiler NO[sub x] control demonstration

Technical Report · Wed Jan 01 00:00:00 EST 1992

DOI:https://doi.org/10.2172/6929771· OSTI ID:6929771

The Coal Reburning for cyclone Boiler No. Control Demonstration project progress for April, May, and June 1992 is identified in this ninth quarterly report and pertains to the on-going activities of Phase III -- Construction and Start-up and Phase III -- Operation and Disposition. The project involves retrofitting/testing the reburning technology at Wisconsin Power Light's 100 MWe Nelson Dewey Unit No. 2 in Cassville, Wisconsin to determine the commercial applicability of this technology to reduce NO[sub x] emission levels. Under Phase IIB additional tuning of the control system was completed and operation in the full automatic mode was carried out in May, 1992 in anticipation of long-term testing. Phase IIB was complete at that point. Phase III activities emphasized completion of parametric optimization testing to characterize the reburn system. As of May 21, 1992, long-term testing with WP L operating the reburn system in full automatic in a load following mode, was under way. Preliminary results indicate that No. emissions reductions of 50% and greater have been achieved as a result of reburn operation at full load. Furnace exit gas temperature has been reduced by 150[degrees]F as a result of reburn operation, again at full load. This effect is less significant at lower loads. No adverse impact on slagging and fouling has been observed and precipitator performance remains essentially unchanged. Unburned carbon on ash losses appear to have increased during reburn operation. Preliminarily at full load, boiler thermal efficiency is reduced because of higher unburned carbon by between 0.3% and 0.7% in the worst case. Efficiency losses appear to be higher at low loads. This effect will be further quantified with long-term performance test data to be taken in September, 1992.

• Research Organization: Babcock and Wilcox Co., Cassville, WI (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FC22-90PC89659
• OSTI ID: 6929771
• Report Number(s): DOE/PC/89659-T10; ON: DE93004941
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES
COAL
STAGED COMBUSTION
NITROGEN OXIDES
AIR POLLUTION ABATEMENT
CYCLONE COMBUSTORS
DEMONSTRATION PROGRAMS
PROGRESS REPORT
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
NITROGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion
010800 - Coal
Lignite
& Peat- Waste Management
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)