两种煤气化工艺下Ni基载氧体链式燃烧联合循环性能模拟  

Performance Simulation of Ni-Based Chemical Looping Combustion Combined Cycle With Different Gasification Processes

作　　者：向文国[1] 牟建茂[1] 狄藤藤[2] 

机构地区：[1]东南大学洁净煤发电及燃烧技术教育部重点实验室,江苏省南京市210096 [2]四川电力职业技术学院动力工程系,四川省成都市610072

出　　处：《中国电机工程学报》2007年第29期28-33,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50176010;90410009);国家重点基础研究发展规划基金项目(2007CB210101)~~

摘　　要：化学链燃烧能在能量释放的同时有效分离CO2。该文用ASPEN PLUS软件对Ni/NiO/NiAl2O4作载氧体的整体煤气化链式燃烧联合循环系统进行了模拟,研究了管式气化方式和德士古(Texaco)气化方式对联合循环系统性能的影响,并对2种气化系统进行了比较。模拟结果表明,空气反应器温度1200℃,补燃后透平进口温度1350℃,管式气化系统效率为44.36%,德士古气化系统效率为41.81%;空气反应器温度从1000℃升高到1200℃,管式气化系统CO2减排量从174g/(kW·h)减少到75g/(kW·h),德士古气化系统CO2减排量从260g/(kW·h)减少到133g/(kW·h);补燃后透平进口温度从1300℃升高到1500℃,管式气化系统效率从43.96%提高到45.53%,德士古气化系统效率从41.14%提高到42.9%;在一定的透平进口温度下,存在最佳压气机压缩比。Chemical looping combustion （CLC） is a combustion technology with inherent separation of the greenhouse gas CO2. An integrate gasification combined cycle with CLC using Ni/NiO/NiAl2O4 as the oxygen carrier is proposed and simulated. Two gasification processes, i.e. pipetyped gasification and Texaco gasification, are included. The effects of the two gasification processes on the combined cycle system performance are compared and analyzed. Assuming the air reactor temperature at 1 200 ℃, the turbine inlet temperature （TIT） alter supplementary firing at 1 350 ℃, the system efficiencies of pipe-typed gasification and Texaco gasification are 44.36% and 41.81% respectively. When the temperature of air reactor increases from 1 000 ℃ to 1 200 ℃, the CO2 emission decreases from 174 g/（kW.h） to 75 g/（kW.h） with pipe-typed gasification and from 260g/（kW.h） to 133g/（kW.h） with Texaco gasification. When the TIT increases from 1 300 ℃ to 1 500℃, the system efficiency increases from 43.96% to 45.53% with pipe-typed gasification and from 41.14% to 42.9% with Texaco gasification. There is an optimal compression ratio under different supplementary firing temperature.

关 键 词：化学链式燃烧 气化 CO2分离 联合循环 

分 类 号：TQ546[化学工程—煤化学工程]