Mercury reduction system and method in combustion flue gas using staging
US6895875B1 · kind B1 · utility
10Cited by
47References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2003 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Nov 30, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23J2219/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method to reduce mercury in gas emissions from the combustion of coal is disclosed. Mercury emissions can be reduced by staging combustion process and/or reducing boiler excess oxygen. Fly ash formed under combustion staging conditions is more reactive towards mercury than fly ash formed under typical combustion conditions. Reducing boiler excess oxygen can also improve ability of fly ash to adsorb mercury.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.