Method of reducing NOx emissions in rotary preheater mineral kilns
US7377773B2 · kind B2 · utility
2Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2006 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Sep 8, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a method to further enhance NOx reduction in rotary preheater mineral kilns by coupling the temperature control and gas composition uniformity afforded by the high temperature mixing with the use of chemical reducing agents. The chemical reducing agent or agents, generally chosen from ammonia or ammonia precursors, are introduced at a specific point in the rotary preheater kiln which has as an optimal temperature window to achieve the greatest reduction of NOx emissions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.