Effect of Nox control technology on efficient utilization of fuel and energy

Conference · Thu Dec 01 04:00:00 EST 1983 · Alternative Energy Sources; (United States)

OSTI ID:6674615

Khan, M R; Ogunsola, O I

Combustion modification technology has enabled many utility boilers to meet the NOx emission standards. Since the technology involves modifications in either the combustion or the operating conditions, it is expected to have some effect on the performance of the plant or boiler. This paper, therefore, outlines some of the important NOx control techniques and their influence on plant performance, thermal efficiency, and efficient utilization of fuel and energy. In general, the NOx control technology involving reduced excess air operation and/or staged combustion is plagued with increased CO and smoke emission and increased loss of fuel as carbon NOx. For example, a 400 MW plant loses about one million dollars a year on fuel for operating at low excess air. These techniques also show an increasing or decreasing effect on fuel saving and boiler performance depending on the fuel type, technique, and operating conditions. Techniques such as reduced air-preheat temperature and flue gas recirculation which reduce flame temperature control thermal NOx, but have some effect on thermal efficiency as well as fuel savings. About 3% of fuel savings is lost by reducing the air-preheat temperature by about 100 K, while no noticeable consequence is reported by recirculating the flue gases and by the thermal Denox process.

• Research Organization: Pennsylvania State Univ., University Park, PA
• OSTI ID: 6674615
• Report Number(s): CONF-831205-
• Conference Information: Journal Name: Alternative Energy Sources; (United States)
• Country of Publication: United States
• Language: English

Related Subjects

29 ENERGY PLANNING, POLICY, AND ECONOMY
290300 -- Energy Planning & Policy-- Environment
Health
& Safety
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACID RAIN
AIR POLLUTION CONTROL
ATMOSPHERIC PRECIPITATIONS
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION CONTROL
COMBUSTION PRODUCTS
CONTROL
DENITRIFICATION
EFFICIENCY
ENERGY EFFICIENCY
FLUE GAS
FUEL ECONOMY
FUELS
GASEOUS WASTES
INDUSTRIAL PLANTS
MAXIMUM PERMISSIBLE CONCENTRATION
MODIFICATIONS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
RAIN
RECOMMENDATIONS
RECYCLING
SAFETY STANDARDS
STANDARDS
WASTES