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Received November 26, 2009
Accepted February 12, 2010
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Reasearch on the main factors for changes in pressure based on turbulent circulating fluidized bed coal gasification technology
1Thermoenergy Engineering Research Institute, Southeast University, Nanjing 210096, Jiangsu Province, China 2School of Metallurgy and Resource, Anhui University of Technology, Maanshan 243002, Anhui Province, China
ddffeng@126.com
Korean Journal of Chemical Engineering, November 2010, 27(6), 1707-1714(8), 10.1007/s11814-010-0266-8
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Abstract
High temperature preheated air and steam as gasifying agent and coal gasification was performed in a pressurized turbulent circulating fluidized bed (CFB) gasification pilot plant to investigate the pressurized gasification process and estimate its potential. Within the scope of this paper this test facility as well as its operation behavior was described. Furthermore, the parameter pressure has been investigated regarding its influence on the syngas composition and was presented and discussed in the following. The results show that the gasification quality is improved at higher pressure because of the better fluidization in the reactor. Coal gasification at a higher pressure shows advantages in lower heat value and carbon conversion. With the gasifier pressure increased from 0.1MPa to 0.3MPa, the gas heating value is increased by 15%. Increasing the gasifier pressure would increase the carbon conversion from 57.52% to 76.76%._x000D_
Also, the dry gas yield and efficiency of cold gas increase little with the increase of the gasifier pressure. The operating parameter of pressure exists at optimum operating range for this specific CFB coal gasification process.
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