Emission reduction on two industrial boilers with major combustion modifications. Final report January 1976--January 1978

Technical Report · Thu Jun 01 04:00:00 EDT 1978

OSTI ID:6387168

Carter, W A; Buening, H J; Hunter, S C

The report gives results of a study of the effects on pollutant emissions of extensive combustion modifications on two industrial boilers. Staged combustion, variable excess air, and variable air preheat were evaluated while firing natural gas or No. 6 fuel oil in a watertube boiler rated at 16 MW thermal input (55 million Btu/hr). Reductions in NOx of 31% for natural gas and 42% for No. 6 fuel oil were obtained when excess air was optimized and staged air was introduced through injection ports in the furnace side, as far downstream from the burner as practical. Combined lowered air preheat and staged combustion reduced NOx by 70% while firing natural gas. In a watertube boiler rated at 6.5 MW thermal input (22 million Btu/hr), flue gas recirculation, staged combustion, and variable excess air were evaluated while firing natural gas, No. 2 fuel oil, or No. 6 fuel oil. The maximum NOx reduction for natural gas was 79% with flue gas recirculation and lowered excess air. A 77% NOx reduction was obtained for No. 2 fuel oil with combined modifications. Since NOx reduction for heavy fuel oil has been very difficult to achieve, the most significant result in the program was a 55% NOx reduction, obtained with a combination of modifications while firing No. 6 fuel oil. Trace species and organics emissions were measured while firing No. 6 fuel oil.

• Research Organization: KVB, Inc., Tustin, CA (USA)
• OSTI ID: 6387168
• Report Number(s): PB-283109; KVB-6004-734
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR
AIR POLLUTION CONTROL
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
DENITRIFICATION
ENERGY SOURCES
FLUE GAS
FLUIDS
FOSSIL FUELS
FUEL GAS
FUEL OILS
FUELS
GAS FUELS
GASEOUS WASTES
GASES
INDUSTRIAL PLANTS
MODIFICATIONS
NATURAL GAS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
POLLUTION CONTROL
THERMOCHEMICAL PROCESSES
WASTES