Testing program on modern stoker-fired boilers for emissions and efficiency

Conference · Tue Jan 01 04:00:00 EST 1980 · Ind. Fuel Conf.; (United States)

OSTI ID:5036744

Mosher, R N

This paper outlines the objectives and presents some of the preliminary findings of a coal fired stoker test program. The current implementation of more rigid air pollution regulations had made it difficult for many coal-burning installations to comply with required stack emission limits, thus creating a further negative influence on coal-firing. In the research program, emission profiles and boiler efficiency have been examined as functions of stoker boiler design and operating practices. Based on the data presented in this paper, preliminary conclusions are as follows. The magnitude of flyash reinjection from the mechanical dust collector has a significant effect on boiler outlet particulate emissions and energy utilization on these boilers. Pneumatic flyash reinjection systems in their present design may not meet today's requirements for reduced emissions and improved fuel economy. In many areas of the country this may not be important from an emissions standpoint because electrostatic precipitators or baghouses will be required. Overfire air systems can effectively reduce opacity and particulate emissions under low excess air conditions, while improving boiler efficiency. Overfire air systems in their present design have proven ineffective in reducing nitric oxide emissions on spreader stokers. Coal properties have not significantly affected emissions of particulates or nitric oxides in these tests.

• Research Organization: Am Boiler Manuf Assoc, Arlington, Va, USA
• OSTI ID: 5036744
• Report Number(s): CONF-8010275-
• Conference Information: Journal Name: Ind. Fuel Conf.; (United States)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000 -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
EFFICIENCY
EMISSION
ENERGY SOURCES
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
MATERIALS
OXIDATION
POLLUTION ABATEMENT
STOKERS
TESTING
THERMOCHEMICAL PROCESSES