基于化学链燃烧生物质煤互补的天然气动力联产系统研究  

System Performance of SNG and Power Polygeneration System With Chemical Looping Combustion Driven by Hybrid Coal and Biomass

作　　者：范峻铭[1,2] 洪慧[1] 金红光[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《工程热物理学报》2017年第7期1466-1471,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学重点基金资助项目(No.51236008)

摘　　要：针对传统煤制天然气过程存在的能量利用不合理、碳捕集能耗过高等技术瓶颈,本文探索了一种能实现CO_2零排放的基于化学链燃烧的生物质煤互补天然气动力联产系统。生物质与煤互补从气化源头调节了合成气中H2/CO比例,有利于甲烷化反应过程,化学链燃烧实现了零能耗的CO_2捕集。研究结果表明:系统总能效率(η_(en))为57.03%,效率(η_(ex))为54.65%,系统能源节约率高达18.6%,实现了系统CO_2零排放。分析了关键参数如氧气碳比(O/C)、蒸气碳比(S/C)、生物质煤互补比例和未反应气循环倍率对系统热力学性能的影响。),异辛烷与醇类(包括丙醇、戊醇、己醇、庚醇)的黏度进行了计算,计算结果表明,计算值与实验值之间的总体平均绝对偏差为1.00%,最大偏差为9.75%。In order to deal with the issues existed in traditional coal-to-SNG process,i.e.improper energy utilization and high energy penalty on CO2 capture,this study is aimed to investigating a coal and biomass co-feed SNG and power polygeneration system with chemical looping combustion for the purpose of zero CO2 emissions.The hybrid biomass and coal originally shifts the CO/H2 ratio in syngas,benefited for methanation process.The function of chemical looping combustion is to meet zero-energy-penalty CO2 capture.The thermodynamic performances show the energy efficiency（η（en））and exergy efficiency（η（ex））of this process can be achieved to 57.03% and 54.65%,respectively,and the primary energy saving potential is maximized to 18.6% by replacing 40%（wt） of coal with biomass.The whole net CO2 emissions are expected to be 0 kg/h owing to the inherent separation of CO2 by means of CLC.The influences of key parameters,including oxygen to carbon ratio（O/C）,steam to carbon ratio（S/C）,biomass share and unreacted gas recycling ratio,on system performances are further analysed.

关 键 词：煤 生物质 天然气 电能 

分 类 号：TK-9[动力工程及工程热物理]