Using flue gas energy to vaporize aqueous reducing agent for reduction of NO.sub.x in flue gas
US5296206A · kind A · utility
23Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1992 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Jul 31, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/8631
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of vaporizing aqueous reducing agent for reducing NO.sub.x in flue gas in a combustion system. A heat exchanger is disposed in the flue gas path so that heat from the flue gas heats a heat transfer medium, preferably ambient air. The heated air is passed to a vaporizer vessel where it vaporizes an aqueous reducing agent, preferably aqueous ammonia. The vaporized ammonia is injected into the flue gas path where it is effective to reduce NO.sub.x. Some aspects of an automatic control system are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.