Design and shakedown of {Pi} shaped CFB boiler of 35 t/h
- Huazhong Univ. of Science and Technology, Wuhan, Hubei (China). National Lab. of Coal Combustion; and others
The CFB boiler has been extensively developed for years in China. There are 5 kinds of CFB boilers developed by universities and institutes. The {Pi} shaped CFB boiler with downward exhaust gas cyclones designed by Huazhong University of Science and Technology and fabricated by Wuchang Boiler and the Container Works is one of these boilers which has operated since 1994. This paper describes the design considerations: {Pi} shaped configuration that makes the boiler more compact and reduces boiler space requirements; Coal size ranges 0--10 mm which means that a small particle fluidized bed is superimposed on a large particle fluidized bed; Some immersed heating surface placed in the dense phase bed of the CFB boiler that makes the boiler cost cheaper; and A patented solid cyclone separator with downward exhaust gas is employed in the design and the separating efficiency is higher and the pressure drop is lower. Due to some uncertainty, the design of the heating surface area and gas velocity are considered. This paper also describes some problems overcome in the shakedown and operation process. Operation of the CFB boiler reveals that the boiler has reached the designed steam capacity and runs steady at the rated steam capacity. The ash return device works quite well.
- OSTI ID:
- 357842
- Report Number(s):
- CONF-9705116--; ISBN 0-7918-1557-9
- Country of Publication:
- United States
- Language:
- English
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