Method and apparatus for heating a furnace
US6672858B1 · kind B1 · utility
30Cited by
5References
3Claims
0Family size
Inventors
Key dates
| Filing date | Jul 18, 2001 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Nov 28, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23D14/126
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An improved process for heating furnaces using a burner design that produces very low level of undesirable nitrogen oxides is provided. The process recirculates a large volume of furnaces gases back to the burner where it is mixed with fuel gas in a plurality of recirculation ports prior to combusting with air in a primary combustion zone. Dispersion of the fuel gas in the recirculated furnace gases is believed to result in lower peak flame temperatures and therefore minimizing the formation of the pollutants, such as nitrogen oxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.