Device for catalytic exhaust gas purification
US6442933B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 2001 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Feb 12, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A device for catalytic removal of a pollutant from an exhaust gas of a combustion system, particularly, a fossil-fired power plant or an internal combustion engine, includes an exhaust-gas duct for carrying exhaust gas, a reagent, a muffler having an injection space and a mixing space for mixing the reagent with the exhaust gas, an injection device for introducing the reagent into the exhaust gas in the injection space, at least one catalytic converter disposed in the exhaust-gas duct, and mixers disposed at least one of before and after the injection space with respect to a direction of flow of the exhaust gas. The mixers define a distance therebetween, and the distance is matched to a frequency of sound to be damped in the exhaust gas. According to the invention, the injection chamber and the downstream mixture chamber are embodied as a muffler in order to reduce the emissions of sound while enabling the production of a device having a compact structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.