摘要
以300 MW亚临界燃煤锅炉为研究对象,对加入能量回收系统的富氧燃烧脱碳技术进行了技术经济性分析,并与空气燃烧+单乙醇胺(MEA)脱碳技术和常规富氧燃烧脱碳技术进行了对比分析.结果表明:空气燃烧+MEA技术导致电厂效率降低最多,而能量回收系统的加入可使在富氧燃烧方式下电厂的净效率提高2.59%;脱碳工艺的加入使得发电成本有不同程度的提高,发电成本增幅最大的是空气燃烧+MEA燃烧方式,其发电成本较参照电厂(0.2700元/(kW.h))增至0.3975元/(kW.h),而加入能量回收系统的富氧燃烧方式可使发电成本降为0.3464元/(kW.h);采用MEA化学吸附法的脱碳费用(154.841元/t)远高于富氧燃烧电厂(30.365元/t),而能量回收系统的加入可使富氧燃烧电厂的CO2脱除费用进一步降低至23.322元/t.
Taking a 300 MW subcritical coal-fired boiler as the object of study,techno-economic analysis of CO_2 removal technology based on oxygen-enriched combustion with potential energy recovery was carried out,of which the results were compared with those of air combustion ＋ MEA absorption technology and conventional oxygen-enriched combustion technologies.Results show that the air combustion ＋ MEA absorption technology results in the largest reduction of power plant efficiency.With proposed energy recovery system,net efficiency of power plant may be raised by 2.59% under oxygen-enriched combustion conditions.The addition of CO_2 removal process makes power generation cost rise at different degrees for various combustion modes,in which the air ＋ MEA way rises the most（from reference power plant＇s（0.270 0RMB/（kW·h）） to 0.397 5RMB/（kW·h））,and if energy recovery system is adopted,the cost may drop to 0.346 4RMB/（kW·h）,i.e.for CO_2 removal,the air ＋ MEA way produces the highest cost（154.841RMB/t）,far more than traditional oxygen-enriched combustion way（30.365RMB/t）,whereas the proposed mode with energy recovery system produces the least cost for CO_2 removal（23.322RMB/t）.
出处
《动力工程学报》
CAS
CSCD
北大核心
2010年第3期184-191,共8页
Journal of Chinese Society of Power Engineering
基金
国家高技术研究发展计划(863计划)资助项目(2009AA05Z310)
关键词
燃煤锅炉
富氧燃烧
能量回收系统
经济性分析
脱碳
coal-fired boiler
oxygen-enriched combustion
energy recovery system
economic analysis
CO_2 removal
