Apparatus for removing nitrogen oxides from flue gas
US4297319A · kind A · utility
8Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1978 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Dec 6, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/8631
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus for removing nitrogen oxides from a flue gas comprises a first stage of injecting ammonia in a combustion flue gas and then hydrogen peroxide thereto, thereby decomposing nitrogen oxides in the combustion flue gas to nitrogen and water by gas phase reduction, and a second stage of passing the combustion flue gas leaving the first stage through a bed of catalyst whose temperature is controlled by cooling water passing through a cooling pipe provided through the bed of catalyst, thereby conducting decomposition of excess ammonia exiting from the first stage and further reaction of nitrogen oxides at the same time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.