生物质两段式富氧气化-燃气轮机燃烧集成发电系统模拟研究  

Simulation Study of Biomass Two-stage Enriched Air Gasification-Gas Turbine Combustion for Power Generation

作　　者：梁绍华[1] 张泰岩 姚永灵[2] 卢承斌[2] 徐斌[2] 牛淼淼 LIANG Shaohua;ZHANG Taiyan;YAO Yongling;LU Chengbin;XU Bin;NIU Miaomiao(School of Energy and Power Engineering,Nanjing Institute of Technology,Nanjing 211167,China;Jiangsu Frontier Electric Power Technology Co.,Ltd.,Nanjing 210036,China)

机构地区：[1]南京工程学院能源与动力工程学院,江苏南京211167 [2]江苏方天电力技术有限公司,江苏南京210036

出　　处：《生物质化学工程》2021年第3期47-54,共8页Biomass Chemical Engineering

基　　金：国家自然科学基金资助项目(51906100);江苏省自然科学基金资助项目(BK20191015)。

摘　　要：为实现生物质能量的高效清洁利用,本研究基于两段式富氧气化系统改进燃气品质,并将获得的洁净高热值可燃气用于燃气轮机燃烧。通过Aspen Plus模拟研究分析了氧体积分数、气化温度对气化特性、燃机运行特性的影响,研究结果证实了生物质气化燃气在燃气轮机应用的可行性,并发现氧体积分数提高对改善生物质气化燃气品质及系统发电效率具有重要意义。两段式气化二次气化温度提高会引起气化效率及系统发电效率下降,因此气化温度需控制在合适范围。在满足生物质灰分完全熔融液化分离的前提下,气化温度可取较低值;两段式气化系统可选择氧体积分数为50%~60%时较佳。在氧体积分数60%、气化温度1200℃时,生物质气化-燃气轮机集成发电系统发电效率(η_(t))达最优,为34%,此时生物质可燃气低位热值(Q_(LHV))为9.54 MJ/m^(3),两段式气化效率(η_(CGE))为78.65%。For the efficient and clean utilization of biomass energy,a two-stage enriched air gasification system was designed to improve the gas quality.The obtained clean high calorific combustible gas was used in gas turbine for power generation.The influence of the oxygen percentage of enriched air and secondary gasification temperature on the gasification performance and gas turbine operating characteristic were analyzed based on the Aspen Plus simulation.The results confirmed the feasibility of application of biomass gasification gas in gas turbines.And it was found that increasing oxygen percentage could efficiently improve the combustible gas quality and the system power generation efficiency.The secondary gasification temperature in the two-stage gasification system could cause slight decrease of gasification efficiency and power generation efficiency.Thus the gasification temperatue should be controlled in a reasonable range.When the gasification temperature was high enough for complete ash melting and separation,lower temperature could be chosen for saving energy.The optimum oxygen percentage of enriched air for two-stage gasification system was 50%-60%.When the oxygen percentage was 60%and the gasification temperature was 1200℃,the power generation efficiency(η_(t))reached maximum(34%),and the lower calorific value of the combustible gas was 9.54 MJ/m^(3) and the two-stage gasification efficiency(η_(CGE))was 78.65%.

关 键 词：生物质 气化模拟 燃气提质 燃气轮机 Aspen Plus 

分 类 号：TQ35[化学工程]