After-air nozzle for two-stage combustion boiler, and a two-stage combustion boiler, boiler and combustion method using the same
US7681508B2 · kind B2 · utility
4Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2005 |
| Grant date | Mar 23, 2010 |
| Priority date | — |
| Expiry date | Oct 25, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23C2900/06041
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An after-air nozzle capable of reducing NOx and CO and a boiler equipped with such a nozzle are provided The after-air nozzle has a vena contracta such that an outside diameter of a flow passage diminishes towards the air-jetting port which supplies air to a boiler, and a changing apparatus changes a flow passage cross-sectional area of the vena contracta. A method of use of such an after-air nozzle and a boiler so equipped is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.