||Evaluation of primary air vitiation for nitric oxide reduction in a rotary cement kiln : Volume 3. Data supplement B. /
Benson, R. C. ;
Frohoff, R. A. ;
Parker, N. R.
||KVB, Inc., Irvine, CA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
|| U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory,
Nitrogen oxide (NO) ;
Air pollution control ;
Carbon monoxide ;
Sulfur dioxide ;
Flue gases ;
Cement industry ;
Cement kilns ;
Emission factors ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||264 pages : illustrations ; 28 cm
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.
Caption title. "October 1986." "EPA/600/7-86/034c." Microfiche.