Apparatus and method of reducing nitrogen oxide emissions
US4779545A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1988 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Feb 24, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23J2219/201
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for reducing nitrogen oxide emissions from furnace flue gas is provided in which a pulse generator introduces natural gas, or other fluid fuel which has little or no fixed nitrogen, into the upper portion of the furnace. The fuel pulse reacts with the nitrogen oxide in the flue gas to form ammonia-like compounds and nitrogen gas. These ammonia-like compounds react with additional amounts of nitrogen oxide in the flue gas to form nitrogen gas, water vapor and carbon dioxide. In this manner, the amount of nitrogen oxide in the flue gas is reduced using a process which can be easily applied to retrofitted furnaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.