The development of an ultra-low-emission gas-fired cyclonic combustor

Conference · Tue Jan 01 00:00:00 EST 1991

OSTI ID:6008536

Xiong, Tian-yu; Khinkis, M J ^[1]; Coppin, W P ^[2]

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1. Institute of Gas Technology, Chicago, IL (United States)
2. Maxon Corp., Muncie, IN (United States)

A gas-fired cyclonic combustor has been developed for relatively low-temperature direct-air heating applications that require ultra-low pollutant emissions. High-lean premixed combustion with a flame stabilizer is adopted to achieve ultra-low emissions and high turndown operation. On the basis of analytical studies and cold modeling, a 350-kW test combustor was designed and successfully tested. Experimental results obtained using natural gas and ambient air demonstrated that the test combustor can operate steadily at high excess air up to 80% to 100% over a large turndown range up to 40:1. At design operating conditions, NO{sub x} emissions as low as 0.6 vppm and CO and total hydrocarbon (THC) emissions below 3 vppm were achieved. Over the full operating range, NO{sub x} emissions from 0.3 to 1.0 vppm and CO and THC emissions below 4 vppm were demonstrated. In all tests, concentrations of NO{sub 2} were less than 40% of the total NO{sub x} emissions -- lower than the level of NO{sub 2} emissions from combustion processes required for good indoor air quality (0.5 vppm). This paper presents the concept of high-lean premixed ultra-low-emission cyclonic combustion, design specifications for the combustion system, and the major experimental results, including flame stability, emissions, and turndown performance. 13 refs., 12 figs., 1 tab.

• Research Organization: Institute of Gas Technology, Chicago, IL (United States)
• OSTI ID: 6008536
• Report Number(s): CONF-911051-2; ON: TI92002490
• Resource Relation: Conference: International conference on environmental control of combustion processes, Honolulu, HI (United States), 7-10 Oct 1991
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
03 NATURAL GAS
CYCLONE COMBUSTORS
DESIGN
TESTING
AIR POLLUTION ABATEMENT
CARBON MONOXIDE
HYDROCARBONS
NATURAL GAS
NITROGEN DIOXIDE
NITROGEN OXIDES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
COMBUSTORS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
320106* - Energy Conservation
Consumption
& Utilization- Building Equipment- (1987-)
034000 - Natural Gas- Combustion
030800 - Natural Gas- Environmental Aspects