华中科技大学学报（自然科学版）Issue(12)：10-15,6.DOI:10.13245/j.hust.141203
煤粉富氧燃烧锅炉改造的热力计算研究
Study on thermodynamic calculation of a coal-fired boiler retrofitted with pulverized coal oxy-fuel combustion
摘要
Abstract
Four types of boiler were selected to analyze the feasibility of oxy‐fuel combustion boiler retrofitted from existing conventional air boiler and the changes of the thermal performance parame‐ters before and after retrofit .Research results show that the air boiler can operate in the oxy‐fuel com‐bustion atmosphere by adjusting the circulation ratio without any change of structure .CO2 has a high thermal capacity ,resulting in uneven absorbing heating on the heating surface and the greatly decrease of flue gas rate ,thus influencing safe operation of the boiler .Targeted improving the gas flow rate and reducing the heating surface area can achieve the oxy‐fuel combustion boiler retrofits .The results show that the thermodynamic calculation parameters of after the oxy‐fuel transformation boiler have reached the similar conditions of air atmosphere .Compared with air atmosphere ,oxy‐fuel combustion retrofit boiler have 0 .7% ~2 .5% decrease on the volume thermal load and the sectional thermal load , and the total of flue gas reduces by about 20% , but the thermal efficiency of boiler increase by 0 .42% ~4 .10% .关键词
燃煤锅炉/富氧燃烧/热力计算/煤粉/烟气循环Key words
coal-fired boilers/oxy-fuel combustion/thermodynamic calculation/pulverized coal/re-cycled flue gas分类
能源科技引用本文复制引用
易宝军,张立麒,朱海跃,郑楚光..煤粉富氧燃烧锅炉改造的热力计算研究[J].华中科技大学学报（自然科学版）,2014,(12):10-15,6.基金项目
国家重点基础研究发展计划资助项目（2011CB707301）；科技部国际合作项目（2012DFB60100）；国家科技支撑计划资助项目（2011BAC05B01）． （）
