Bench scale process evaluation of reburning for in furnace NO /SUB x/ reduction

Conference · Sat Sep 01 04:00:00 EDT 1984 · Am. Soc. Mech. Eng., (Pap.); (United States)

OSTI ID:6351718

Green, S B; Chen, S L; Heap, M P; Pershing, D W; Seeker, W R

Reburning involves the injection of a secondary fuel above the main firing zone of pulverized coal fired utility boilers to produce a reducing zone which acts to reduce NO /SUB x/ to molecular nitrogen. Overfire air is added above the reburn reducing zone to complete the combustion. Bench scale evaluations of the process carried out in a plug flow furnace at 23 KW /SUB t/ have indicated that NO /SUB x/ reductions of up to 70% can be achieved depending on a number of process variables. The dominant variables include the initial NO /SUB x/ level that is to be reduced, the reburning fuel type (pulverized coal type or natural gas) and the residence time and temperature in the reducing zone. The reburning process has been combined with the injection of calcium based sorbents (limestone) to investigate the potential for combined NO /SUB x/ and SO /SUB x/ reduction.

• Research Organization: Energy and Environment Research Corp., Irvine, CA
• OSTI ID: 6351718
• Report Number(s): CONF-840905-
• Conference Information: Journal Name: Am. Soc. Mech. Eng., (Pap.); (United States) Journal Volume: 84-JPGC-APC-9
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
AIR POLLUTION ABATEMENT
ALKALINE EARTH METAL COMPOUNDS
BENCH-SCALE EXPERIMENTS
BOILER FUELS
BOILERS
CALCIUM COMPOUNDS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL FINES
COCOMBUSTION
COMBUSTION
COMBUSTION CONTROL
COMBUSTION WAVES
CONTROL
DENITRIFICATION
DESULFURIZATION
FOSSIL-FUEL POWER PLANTS
FUELS
FURNACES
GASEOUS WASTES
LIMESTONE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POWER PLANTS
RECYCLING
REDUCTION
ROCKS
SEDIMENTARY ROCKS
SORPTION
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
WASTES