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RECORD NUMBER: 592 OF 1672

OLS Field Name OLS Field Data
Main Title Evaluation of primary air vitiation for nitric oxide reduction in a rotary cement kiln : Volume 1. Technical report. /
Author Benson, R. C. ; Hunter, S. C.
Other Authors
Author Title of a Work
Hunter, S. C.
CORP Author KVB, Inc., Irvine, CA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory,
Year Published 1986
Report Number EPA/600/7-86/034A; EPA-68-02-3690
Stock Number PB87-113247
Subjects Kilns, Rotary.
Additional Subjects Nitrogen oxide(NO) ; Air pollution control ; Combustion ; Flue gases ; Tables(Data) ; Graphs(Charts) ; Quality assurance ; Concentration(Composition) ; Cement industry ; Kilns ; Combustion modifications ; Cement kilns ; Emission factors
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB87-113247 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 395 pages : illustrations ; 28 cm
Abstract
The report gives results of tests to evaluate combustion modifications for nitric oxide (NO) reduction and cement product quality in a pilot-scale long-dry-process cement kiln firing pulverized coal. The kiln is rated at 11.35 kg/s (1080 tons/day) of cement with a thermal input rate of 70.3 MW (240 million Btu/hr). Of the combustion modifications evaluated in previous studies, vitiation of the primary air with inert gas (nitrogen) was considered the best alternative for NO reduction on a pilot-scale kiln. The percent reduction was established from a reference baseline of 1050 ppm (corrected to 3% O2) and a kiln exit oxygen of 1.82%. The NO volumetric emissions were lowered to 880 ppm (corrected to 3% O2) with a kiln exit oxygen of 0.7%. NOx reductions during the short term nitrogen injection tests were about 25-30% with no adverse effects on product quality. Because of the interacting feed chemistry/kiln operations, it was not possible to clearly isolate the effect of nitrogen injection.
Notes
Caption title. "October 1986." "EPA/600/7-86/034." Microfiche.