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Investigation and Application of “Bluff‐body in Cavity” Burner for Pulverized Coal Combustion
Author(s) -
Chen Gang,
Qiu JiHua,
Xu MingHou,
Zheng ChuGuang
Publication year - 2001
Publication title -
developments in chemical engineering and mineral processing
Language(s) - English
Resource type - Journals
eISSN - 1932-2143
pISSN - 0969-1855
DOI - 10.1002/apj.5500090314
Subject(s) - combustor , bluff , pulverized coal fired boiler , combustion , mechanics , ignition system , turbulence , anemometer , materials science , engineering , chemistry , physics , aerospace engineering , organic chemistry
The flow and combustion process of a new type of pulverized coal burner, the “bluff‐body in cavity”, is studied in this paper. This is an improvement on the basic principle of the ordinary bluff‐body burner. Mean and fluctuating velocity components and turbulence characteristics of the flow in the outlet of the “bluff‐body in cavity” burner were measured using a three‐dimensional laser particle dynamics anemometer (3D‐PDA). Combustion tests showed that this burner is better than an ordinary burner with only a bluff‐body regarding the ignition and flame stability. Application of this new burner in several power plant boilers (65‐670 t/h) showed that the temperature in the flame zone is high, the combustion process is very stable, and the boiler efficiency is increased. These improvements indicate a promising future for the burner.