与燃煤电站和S-CO_(2)循环耦合的生物质气化发电系统性能分析  

Performance analysis of a biomass gasification power generation system integrated with coal-fired power plant and S-CO_(2)cycle

作　　者：于志勇 王新刚 吴高磊 朱子民 卢荻 陈衡 YU Zhiyong;WANG Xingang;WU Gaolei;ZHU Zimin;LU Di;CHEN Heng(State Grid Xinjiang Economic Research Institute,Urumqi 830063,China;China National Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830011,China;Electric Power Research Institute of State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830013,China;School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]国网新疆电力有限公司经济技术研究院,新疆维吾尔自治区乌鲁木齐830063 [2]国网新疆电力有限公司,新疆维吾尔自治区乌鲁木齐830011 [3]国网新疆电力有限公司电力科学研究院,新疆维吾尔自治区乌鲁木齐830013 [4]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《洁净煤技术》2023年第9期38-50,共13页Clean Coal Technology

基　　金：国家自然科学基金资助项目(52276006)。

摘　　要：为充分利用生物质资源,提出了与燃煤机组和超临界二氧化碳循环的生物质气化系统概念,该系统的生物质气化利用过程与燃煤机组及超临界二氧化碳循环的高度耦合。合成气经二氧化碳冷却后,经净化后送入燃气轮机燃烧。烟气经燃气轮机,超临界二氧化碳循环,锅炉给水逐步回收热量,提升了生物质的利用率,进而提高了发电效率。以660 MW燃煤机组和16 t/h生物质气化炉为例,通过对系统仿真,对其进行了热力学和经济性分析。结果表明,所提出的耦合系统引入了46.66 MW的生物质能,额外发出了21.09 MW功率,生物质能效率可达45.20%,[火用]效率可达41.67%,可充分利用生物质中能量。系统净现值约40 468万元,且约需2.94 a即可收回成本,具有良好的经济效益。In order to fully utilize the biomass resources,a concept of biomass gasification system with coal-fired power plant and supercritical CO_(2)cycle was presented.The biomass gasification utilization process of this system is highly coupled with coal-fired power plant and supercritical CO_(2)cycle.After being cooled by carbon dioxide,the syngas is purified and fed to the gas turbine for combustion.The heat in the flue gas is gradually recovered through the gas turbine,supercritical CO_(2)cycle and coal-fired power plant feedwater,enhancing the utilization and thus improving the efficiency.Taking a 660 MW coal-fired unit and a 16 t/h biomass gasification furnace as examples,thermodynamic and economic analysis was conducted through system simulation.The results show that the proposed coupled system introduces 46.66 MW of biomass energy and generates an additional 21.09 MW of power,and the efficiency of biomass-to-electric energy can reach up to 45.20%and the exergy efficiency can reach 41.67%,which fully utilizes the energy in the biomass.The net present value of the system is about 404.68 million yuan,and it only takes about 2.94 years to recover the investment,which shows the good economic performance of the system.

关 键 词：生物质气化 系统耦合 燃气轮机 超临界二氧化碳循环 燃煤电站 

分 类 号：TM85[电气工程—高电压与绝缘技术]