Radiation Characteristics Analysis of Flue Gas in Oxy-fuel Combustion Circulating Fluidized Bed Boiler Under Dry or Wet Flue Gas Recirculation Mode

被引：0
|
作者：
Gao D. [1 ]
Chen H. [1 ]
Yang J. [1 ]
Gu J. [1 ]
机构：
[1] Department of Power Engineering, North China Electric Power University, Baoding, 071003, Hebei Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 04期
关键词：
Circulating fluidized bed boiler; Flue gas radiation; Flue gas recirculation; Oxy-fuel combustion; Wide band k cumulative distribution model;
D O I：
10.13334/j.0258-8013.pcsee.180370
中图分类号：
学科分类号：
摘要：
Based on the consideration of spectral line pressure widening effect, the wide band k cumulative distribution model of radiant gas based on the band general non-dimensional absorption coefficient cumulative distribution function was built, and the latest high resolution spectral databases for gas radiation characteristics were used to fit the band characteristic parameter calculation formulas of H2O and CO2 under different temperatures based on polynomial. By combining the overlapping bands in H2O and CO2 mixtures, the equivalent band characteristic parameter calculation models for combined bands were built which can be used in the band general non-dimensional absorption coefficient cumulative distribution function, so the band absorption coefficients for the overlapping bands of high concentration H2O and CO2 mixture can be calculated directly. On this basis, combining the dynamic calculation model of H2O and CO2 in flue gas under different flue gas recirculation modes in oxy-fuel combustion circulating fluidized bed boiler, the influence on the flue gas radiation characteristics due to flue gas recirculation process and variation of furnace temperature or oxygen concentration under dry or wet flue gas recirculation mode was analyzed. © 2019 Chin. Soc. for Elec. Eng.
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页码：1086 / 1096
页数：10
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