Method for reducing nitrogen oxides in strip treatment furnaces
US11104975B2 · kind B2 · utility
0Cited by
4References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 2018 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | May 29, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/143
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a method for treating metal strip in a directly fired furnace through which the metal strip is guided. The furnace is fired directly by gas burners and has a non-fired zone through which the exhaust gases from the fired zone flow and thus heat the metal strip. After leaving the non-fired zone, the exhaust gases from the furnace undergo post-combustion in an afterburner chamber. According to the invention, methane is injected into the non-fired zone, which causes nitrogen oxides contained in the waste gas to be converted into hydrogen cyanide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.