Pulverized coal burner
A burner is described having lower emissions and lower unburned fuel losses by implementing a transition zone in a low NO{sub x} burner. The improved burner includes a pulverized fuel transport nozzle surrounded by the transition zone which shields the central oxygen-lean fuel devolatilization zone from the swirling secondary combustion air. The transition zone acts as a buffer between the primary and the secondary air streams to improve the control of near-burner mixing and flame stability by providing limited recirculation regions between primary and secondary air streams. These limited recirculation regions transport evolved NO{sub x} back towards the oxygen-lean fuel pyrolysis zone for reduction to molecular nitrogen. Alternate embodiments include natural gas and fuel oil firing. 8 figs.
- Research Organization:
- Babcock and Wilcox Co
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-92PC92160
- Assignee:
- Babcock and Wilcox Co., New Orleans, LA (United States)
- Patent Number(s):
- US 5,829,369/A/
- Application Number:
- PAN: 8-747,319
- OSTI ID:
- 675795
- Country of Publication:
- United States
- Language:
- English
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