Control of air flow in a burner for a tangentially fired boiler
US4089637A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1977 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | May 20, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23C7/008
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A fuel admission assembly for a tangentially fired furnace that utilizes oil, gas, or other utility grade fuels. The assembly disclosed has the ability to achieve a positive control of the air flow through a specially designed swirler. Because of this unique feature of its design, this assembly will permit efficient tangential boiler operation at 5% excess air or less over a fuel turndown ratio of at least 3 to 1 on each assembly. At the same time, it will not produce unacceptable levels of noxious emissions such as oxides of nitrogen, carbonaceous soot or sulfur smuts over its full operating range. Finally, it requires no additional fan head (windbox pressure drop).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.