耦合环形炭分离器的煤化学链燃烧热态实验
|
摘要
在煤化学链燃烧过程中,煤焦颗粒易被载氧体颗粒流携带进入空气反应器,导致系统碳捕集效率降低.针对煤焦与载氧体二元颗粒分离问题,提出了环形炭分离器与燃料反应器耦合设计,搭建并运行了耦合环形炭分离器的煤化学链燃烧热态实验系统.实验结果表明,反应器实现了稳定且循环量可控的高温固体循环、合理的压差平衡、稳定的温度分布以及稳定连续的给煤运行.基于环形炭分离器的分离作用,可有效避免煤焦进入空气反应器,其出口CO_2体积分数低至0.75%左右(环形区域气速为1.4 m/s),进而提高系统碳捕集效率.
In coal-fired chemical looping combustion(CLC),char particles are easily carried into the air reactor(AR) by an oxygen carrier particle flow,thereby decreasing the carbon capture efficiency. In the present work,we proposed an integrated design of an annular carbon stripper(CS) and fuel reactor(FR) and built a hot model system of coal-fired CLC coupled with the annular CS. The operating results indicated that the system can achieve controllable and stable solid circulation at a high temperature,reasonable pressure balance,constant temperature profile,and stable continuous coal feed. Due to the effective separation of the annular CS,limited amounts of char were carried into the AR,and the CO_2 concentration at the AR outlet decreased to about 0.75% at an annular zone gas velocity of 1.4 m/s.
In coal-fired chemical looping combustion(CLC),char particles are easily carried into the air reactor(AR) by an oxygen carrier particle flow,thereby decreasing the carbon capture efficiency. In the present work,we proposed an integrated design of an annular carbon stripper(CS) and fuel reactor(FR) and built a hot model system of coal-fired CLC coupled with the annular CS. The operating results indicated that the system can achieve controllable and stable solid circulation at a high temperature,reasonable pressure balance,constant temperature profile,and stable continuous coal feed. Due to the effective separation of the annular CS,limited amounts of char were carried into the AR,and the CO_2 concentration at the AR outlet decreased to about 0.75% at an annular zone gas velocity of 1.4 m/s.
引文
[1]Gauthier T,Yazdanpanah M,Forret A,et al.CLC,a promising concept with challenging development issues[J].Powder Technology,2017,316:3-17.
[2]曾骥敏,肖睿,衡丽君,等.生物质化学链气化制备高H2/CO物质的量比的合成气[J].燃烧科学与技术,2016,22(3):229-235.Zeng Jimin,Xiao Rui,Heng Lijun,et al.Chemical looping gasification of biomass for high H2/CO-ratio syngas[J].Journal of Combustion Science and Technology,2016,22(3):229-235(in Chinese).
[3]王迅,李宇曦,李想,等.电厂燃煤锅炉烟气余热回收的优化利用[J].燃烧科学与技术,2018,24(1):15-20.Wang Xun,Li Yuxi,Li Xiang,et al.Optimized utilization of waste heat recovery from flue gas of coal-fired boiler in power plant[J].Journal of Combustion Science and Technology,2018,24(1):15-20(in Chinese).
[4]Adanez Juan,Abad Alberto,Garcia-Labiano Francisco,et al.Progress in chemical-looping combustion and reforming technologies[J].Progress in Energy and Combustion Science,2012,38(2):215-282.
[5]Kim Hyung R,Wang Dawei,Zeng Liang,et al.Coal direct chemical looping combustion process:Design and operation of a 25-k Wth sub-pilot unit[J].Fuel,2013,108:370-384.
[6]Berguerand Nicolas,Lyngfelt Anders.Design and operation of a 10 k Wth chemical-looping combustor for solid fuels-Testing with South African coal[J].Fuel,2008,87(12):2713-2726.
[7]Thon Andreas,Kramp Marvin,Hartge Ernst-Ulrich,et al.Operational experience with a system of coupled fluidized beds for chemical looping combustion of solid fuels using ilmenite as oxygen carrier[J].Applied Energy,2014,118:309-317.
[8]Abad Alberto,Pérez-Vega Raúl,de Diego Luis F,et al.Design and operation of a 50 kWth chemical looping combustion(CLC)unit for solid fuels[J].Applied Energy,2015,157:295-303.
[9]Ma Jinchen,Tian Xin,Wang Chaoquan,et al.Performance of a 50 kW(th)coal-fuelled chemical looping combustor[J].International Journal of Greenhouse Gas Control,2018,75:98-106.
[10]Shen Laihong,Wu Jiahua,Xiao Jun.Experiments on chemical looping combustion of coal with a NiO based oxygen carrier[J].Combustion and Flame,2009,156(3):721-728.
[11]Markstr?m Pontus,Linderholm Carl,Lyngfelt Anders.Chemical-looping combustion of solid fuels-Design and operation of a 100 k W unit with bituminous coal[J].International Journal of Greenhouse Gas Control,2013,15:150-162.
[12]Clayton C K,Whitty K J.Measurement and modeling of decomposition kinetics for copper oxide-based chemical looping with oxygen uncoupling[J].Applied Energy,2014,116(3):416-423.
[13]Str?hle Jochen,Orth Matthias,Epple Bernd.Chemical looping combustion of hard coal in a 1 MWth pilot plant using ilmenite as oxygen carrier[J].Applied Energy,2015,157:288-294.
[14]成茂,孙宏明,李烨,等.带炭颗粒分离的化学链煤燃烧系统冷态实验研究[J].煤炭学报,2016,41(10):2547-2554.Cheng Mao,Sun Hongming,Li Ye,et al.Cold model experimental study of coal-fired chemical looping combustion coupling riser based carbon stripper[J].Journal of China Coal Society,2016,41(10):2547-2554(in Chinese).
[15]Pérez-Vega Raúl,Abad Alberto,García-Labiano Francisco,et al.Coal combustion in a 50 kWth chemical looping combustion unit:Seeking operating conditions to maximize CO2 capture and combustion efficiency[J].International Journal of Greenhouse Gas Control,2016,50:80-92.
[16]Markstr?m Pontus,Linderholm Carl,Lyngfelt Anders.Operation of a 100 kW chemical-looping combustor with Mexican petroleum coke and Cerrejón coal[J].Applied Energy,2014,113:1830-1835.
[17]Linderholm Carl,Knutsson Pavleta,Schmitz Matthias,et al.Material balances of carbon,sulfur,nitrogen and ilmenite in a 100 kW CLC reactor system[J].International Journal of Greenhouse Gas Control,2014,27:188-202.
[18]Cheng Mao,Sun Hongming,Li Zhenshan,et al.Annular carbon stripper for chemical-looping combustion of coal[J].Industrial&Engineering Chemistry Research,2017,56(6):1580-1593.
[19]Cheng Mao,Li Ye,Li Zhenshan,et al.An integrated fuel reactor coupled with an annular carbon stripper for coal-fired chemical looping combustion[J].Powder Technology,2017,320:519-529.
[2]曾骥敏,肖睿,衡丽君,等.生物质化学链气化制备高H2/CO物质的量比的合成气[J].燃烧科学与技术,2016,22(3):229-235.Zeng Jimin,Xiao Rui,Heng Lijun,et al.Chemical looping gasification of biomass for high H2/CO-ratio syngas[J].Journal of Combustion Science and Technology,2016,22(3):229-235(in Chinese).
[3]王迅,李宇曦,李想,等.电厂燃煤锅炉烟气余热回收的优化利用[J].燃烧科学与技术,2018,24(1):15-20.Wang Xun,Li Yuxi,Li Xiang,et al.Optimized utilization of waste heat recovery from flue gas of coal-fired boiler in power plant[J].Journal of Combustion Science and Technology,2018,24(1):15-20(in Chinese).
[4]Adanez Juan,Abad Alberto,Garcia-Labiano Francisco,et al.Progress in chemical-looping combustion and reforming technologies[J].Progress in Energy and Combustion Science,2012,38(2):215-282.
[5]Kim Hyung R,Wang Dawei,Zeng Liang,et al.Coal direct chemical looping combustion process:Design and operation of a 25-k Wth sub-pilot unit[J].Fuel,2013,108:370-384.
[6]Berguerand Nicolas,Lyngfelt Anders.Design and operation of a 10 k Wth chemical-looping combustor for solid fuels-Testing with South African coal[J].Fuel,2008,87(12):2713-2726.
[7]Thon Andreas,Kramp Marvin,Hartge Ernst-Ulrich,et al.Operational experience with a system of coupled fluidized beds for chemical looping combustion of solid fuels using ilmenite as oxygen carrier[J].Applied Energy,2014,118:309-317.
[8]Abad Alberto,Pérez-Vega Raúl,de Diego Luis F,et al.Design and operation of a 50 kWth chemical looping combustion(CLC)unit for solid fuels[J].Applied Energy,2015,157:295-303.
[9]Ma Jinchen,Tian Xin,Wang Chaoquan,et al.Performance of a 50 kW(th)coal-fuelled chemical looping combustor[J].International Journal of Greenhouse Gas Control,2018,75:98-106.
[10]Shen Laihong,Wu Jiahua,Xiao Jun.Experiments on chemical looping combustion of coal with a NiO based oxygen carrier[J].Combustion and Flame,2009,156(3):721-728.
[11]Markstr?m Pontus,Linderholm Carl,Lyngfelt Anders.Chemical-looping combustion of solid fuels-Design and operation of a 100 k W unit with bituminous coal[J].International Journal of Greenhouse Gas Control,2013,15:150-162.
[12]Clayton C K,Whitty K J.Measurement and modeling of decomposition kinetics for copper oxide-based chemical looping with oxygen uncoupling[J].Applied Energy,2014,116(3):416-423.
[13]Str?hle Jochen,Orth Matthias,Epple Bernd.Chemical looping combustion of hard coal in a 1 MWth pilot plant using ilmenite as oxygen carrier[J].Applied Energy,2015,157:288-294.
[14]成茂,孙宏明,李烨,等.带炭颗粒分离的化学链煤燃烧系统冷态实验研究[J].煤炭学报,2016,41(10):2547-2554.Cheng Mao,Sun Hongming,Li Ye,et al.Cold model experimental study of coal-fired chemical looping combustion coupling riser based carbon stripper[J].Journal of China Coal Society,2016,41(10):2547-2554(in Chinese).
[15]Pérez-Vega Raúl,Abad Alberto,García-Labiano Francisco,et al.Coal combustion in a 50 kWth chemical looping combustion unit:Seeking operating conditions to maximize CO2 capture and combustion efficiency[J].International Journal of Greenhouse Gas Control,2016,50:80-92.
[16]Markstr?m Pontus,Linderholm Carl,Lyngfelt Anders.Operation of a 100 kW chemical-looping combustor with Mexican petroleum coke and Cerrejón coal[J].Applied Energy,2014,113:1830-1835.
[17]Linderholm Carl,Knutsson Pavleta,Schmitz Matthias,et al.Material balances of carbon,sulfur,nitrogen and ilmenite in a 100 kW CLC reactor system[J].International Journal of Greenhouse Gas Control,2014,27:188-202.
[18]Cheng Mao,Sun Hongming,Li Zhenshan,et al.Annular carbon stripper for chemical-looping combustion of coal[J].Industrial&Engineering Chemistry Research,2017,56(6):1580-1593.
[19]Cheng Mao,Li Ye,Li Zhenshan,et al.An integrated fuel reactor coupled with an annular carbon stripper for coal-fired chemical looping combustion[J].Powder Technology,2017,320:519-529.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |