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Study on Thermal Calculation in Boilers with O2/CO2 Recycle Combustion

Author: LiCanZhi
Tutor: ZhangLiZuo
School: Huazhong University of Science and Technology
Course: Thermal Power Engineering
Keywords: O2/CO2 thermal calculation recycle mode oxygen volume
CLC: TK222
Type: Master's thesis
Year: 2011
Downloads: 13
Quote: 0
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Abstract


Coal is the principal part of the primary energy in China. Morn than 70% of the CO2 emission in China came from burning coal. The ultimate way which could largely reduce the carbon emission is to develop new coal combust technologies with carbon capture ability. So CCS is the inevitable choice for our country to reply the target of compellent emission reduction or relative emission reduction. In all the CO2 emission control technologies, the O2/CO2 recycle combust technology not only suitable for the retrofitted traditional boilers, but also suitable for new boilers, its advantages are low cost, high reliability and good successive ability with existing boiler combust technologies, is the easiest CO2 emission reduce technology that can accepted by the traditional power plant. But O2/CO2 recycle combust technology still face many challenges on the way to realize industrialization, the thermal calculation method in O2/CO2 recycle mode is one of them.The thermal calculation method and structure of traditional boilers need to be modified in order to make use of O2/CO2 recycle combust technology. First, the thermal calculation method in traditional boilers is modified and the thermal calculation recycle program in O2/CO2 recycle mode is set up in this paper. Using the modified thermal calculation method, the calculation research had been did in the 220t/h boiler. The thermal calculation results in recycle mode are analyzed and compared to that of traditional air’s, and the structure changing and atmosphere in O2/CO2 recycle mode are optimized. The final results show that the boiler’s heat exchange performance changed a lot in O2/CO2 recycle atmosphere without changing the boiler’s original structure and resulted in some unreasonable thermal parameters; but through adjusting the O2/CO2 recycle mode and changing the boiler’s heating surface can achieve similar thermal performance with that in air’s, and better results can attain in all the three recycle modes, thereby, provided scientific evidence for the retrofitting of traditional boilers to O2/CO2 recycle combust boilers.

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CLC: > Industrial Technology > Energy and Power Engineering > Steam Power Engineering > Steam boiler > Design, calculation
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