Direct ignition of a fluctuating fuel stream
US4221174A · kind A · utility
18Cited by
4References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 1978 |
| Grant date | Sep 9, 1980 |
| Priority date | — |
| Expiry date | May 16, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23D2207/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method of direct ignition of pulverized coal to furnish energy for warm-up or low load operation of a coal burning furnace comprises forming a fuel stream consisting of a mixture of pulverized coal and air, the fuel stream having an air to coal ratio and/or a flow velocity which fluctuates. The fluctuating fluid stream is introduced into a combustion area where the coal is ignited by an energy source. The fluctuation of the air to coal ratio and/or the fluctuation of the flow speed provide for the air to coal ratio and/or the flow speed to be swept through a range of values which includes the optimum conditions for ignition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.