Development of criteria for extension of applicability of low-emission, high-efficiency coal burners. Annual report No. 3, Oct 79-Oct 80

Technical Report · Thu Oct 01 00:00:00 EDT 1981

OSTI ID:5127000

Nurick, W; Payne, R; Lee, J; Case, P; Chen, S

The report describes the third year's efforts in a program to develop criteria for extending the applicability of low-emission, high-efficiency coal burners. For the small-scale fuel studies, 28 coals covering all ranks were tested under a wide variety of conditions to ascertain the impact of coal properties on the fate of fuel nitrogen (N). Significant accomplishments in this part of the program include: (1) bench-scale test results confirm the pilot-scale concept that decreasing the initial air/fuel ratio decreases fuel NOx formation; (2) detailed studies on optimizing a staged combustion system suggest that the stoichiometry producing minimum NOx emissions is a function of both fuel composition and primary-zone conditions; (3) distribution of the total fixed nitrogen (TFN) species--NO, NH/sub 3/, and HCN--leaving the first stage is strongly dependent on coal composition; (4) distribution of the first-stage fuel N emissions has a significant impact on second-stage exhaust NO emissions (minimum second-stage NO emissions depend on competition between first-stage NO and increased gas - and solid-phase N species); and (5) during staged combustion, increasing the rate of heat extraction from the first stage (fuel-rich zone) decreases the decay of TFN species, but dramatically decreases TFN conversion in the second stage (first-stage extraction reduces exhaust NO emissions).

• Research Organization: Energy and Environmental Research Corp., Santa Ana, CA (USA)
• OSTI ID: 5127000
• Report Number(s): PB-82-197153
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
42 ENGINEERING
BURNERS
PERFORMANCE TESTING
COAL
COMBUSTION PRODUCTS
AIR POLLUTION
NITROGEN OXIDES
CHEMICAL REACTION YIELD
AMMONIA
FUEL-AIR RATIO
FURNACES
HYDROCYANIC ACID
INDUSTRIAL WASTES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CYANIDES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDRIDES
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MATERIALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION
TESTING
WASTES
YIELDS
010900* - Coal
Lignite
& Peat- Environmental Aspects
421000 - Engineering- Combustion Systems