Combustion modification tests on a subscale cement kiln for NOx reduction. Final report February 1982-February 1984

Technical Report · Sun Jul 01 04:00:00 EDT 1984

OSTI ID:6489045

Carter, W A; Benson, R C

The report gives results of field tests of a subscale rotary cement kiln to evaluate the effect of various combustion modifications on gaseous emissions, using a research kiln donated by a cement company. The test unit was 8.2 m (27 ft) long and 0.38 m (15 in.) inside diameter and will produce 68 kg (150 lb) of clinker per hour. A coal burner was designed and built for the test program, and the kiln was reworked to incorporate heated secondary air and flue gas recirculation (FGR). The effects on NO emissions of FGR, diluted primary air, primary/secondary air ratio, burner tip velocity, and secondary air temperature were evaluated. The most effective combustion modification for coal firing was determined to be dilution of primary air with inert gas, which reduced NO by nearly 40 percent when the primary-air oxygen concentration was reduced to 12 percent.

• Research Organization: KVB, Inc., Irvine, CA (USA)
• OSTI ID: 6489045
• Report Number(s): PB-84-223502; KVB-72/806031/1900-D190
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
AIR POLLUTION
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
COMBUSTION PRODUCTS
ENERGY SOURCES
FIELD TESTS
FOSSIL FUELS
FUELS
GASEOUS WASTES
INDUSTRIAL WASTES
KILNS
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION
TESTING
WASTES