Exhaust gas denitration method
US6383463B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 7, 1999 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Jan 7, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/8631
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the denitration of combustion exhaust gas from combustion equipment by passing the exhaust gas through an ammonia reduction denitrator, comprises providing a bypass having a low-temperature denitrator installed therein; while the temperature of the exhaust gas is not high enough to allow the ammonia reduction denitrator to function properly, as encountered immediately after starting the combustion equipment, passing the exhaust gas through the bypass to perform the denitration thereof by means of the low-temperature denitrator; when the ammonia reduction denitrator has come to function properly, closing the bypass to perform the denitration of the exhaust gas by means of the ammonia reduction denitrator; and regenerating a catalyst within said low-temperature denitrator while the by-pass is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.