| Title |
Reduction of NOx Emissions from Cement Kiln/Calciner through the Use of the NOxOUT Process |
| Creator |
Sun, W. H.; Bisnett, M. J.; Kirk, D. W.; Steuch, H. E.; Hille, J. |
| Publisher |
University of Utah |
| Date |
1994 |
| Spatial Coverage |
presented at Maui, Hawaii |
| Abstract |
Post-combustion urea injection has proven to be an effective method in controlling NOx from various combustion sources. This process, a selective non-catalytic reduction process known as NOxOUT, has been successfully demonstrated in a cement kiln/calciner operated by Ash Grove Cement. Testing was done under ten different kiln/calciner operating conditions. Using three to four injectors, NOx was efficiently reduced f rom 350 to 600 pounds per hour (3.5 to 6.0 lb / ton of clinker) to less than 100 pounds per hour (1.0 lb / ton of clinker). This calculates to a NOx reduction of >80% for most cases. Chemical utilization was greater than 50%. A high degree of mixing and a long residence time at an appropriate temperature present in the preheater tower contributed to these excellent results. An average ammonia slip was four ppm above a baseline level at normalized stoichiometric ratio of 1. Based on this demonstration, cement kiln/calciners have been identified as an ideal application for the NOxOUT Process. NOx was efficiently and effectively reduced with minimal by-product emissions and virtually no effect on plant operations. |
| Type |
Text |
| Format |
application/pdf |
| Language |
eng |
| Rights |
This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee. |
| Conversion Specifications |
Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth. |
| Scanning Technician |
Cliodhna Davis |
| ARK |
ark:/87278/s6sn0ckc |
| Setname |
uu_afrc |
| ID |
10141 |
| Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6sn0ckc |
