Boiler furnace combustion system
US5146858A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1990 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Oct 3, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23C2201/101
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A boiler furnace combustion system typically includes main burners disposed on side walls of or at corners of a square-barrel-shaped boiler furnace having a vertical axis, the burner axes being directed tangentially to an imaginary cylindrical surface coaxial to the furnace. Air nozzles are disposed in the boiler furnace at a level above the main burners, so that unburnt fuel left in a reducing atmosphere or a lower oxygen concentration atmosphere of a main burner combustion region can be perfectly burnt by additional air blown through the air nozzles. The present invention provides two groups of air nozzles disposed at higher and lower levels, respectively. The air nozzles at the lower level are provided at the corners of the boiler furnace with their axes directed tangentially to a second imaginary coaxial cylindrical surface having a larger diameter than the first imaginary coaxial cylindrical surface. And, the air nozzles at the higher level are provided at the centers of the side wall surfaces of the boiler furnace with their axes directed tangentially to a third imaginary coaxial cylindrical surface having a smaller diameter than the second imaginary coaxial cylindrical surfa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.