Methods and apparatus for burning fuel with low No.sub.x formation
US5344307A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Aug 25, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23C2202/30
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Improved methods and burner apparatus are provided for discharging mixtures of fuel and air into furnace spaces wherein said mixtures are burned and flue gases having low NO.sub.x content are formed therefrom. The methods basically comprise discharging a first fuel mixture containing a portion of the fuel and flue gases from the furnace space into the furnace space whereby the mixture is burned in a primary reaction zone therein and flue gases having low NO.sub.x content are formed therefrom, and then discharging the remaining portion of the fuel into a secondary reaction zone wherein the remaining portion of fuel mixes with air and flue gases to form a second fuel mixture which is burned in the secondary reaction zone and additional flue gases having low NO.sub.x content are formed therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.