【作者】 张亚宁；

【导师】 李晓冬；

【作者基本信息】 哈尔滨工业大学 ， 供热、供燃气、通风及空调工程， 2009， 硕士

【摘要】 生物质是一种可再生的环境友好型能源资源。作为生物质能利用的一种主要技术,生物质气化有重要的研究意义。本论文提出ASPEN PLUS软件模拟生物质气化的总体思路,建立了三种流程图,对比分析确定了其中的一种进行模拟。模拟数据与文献数据相比, H₂体积分数偏大,CH₄体积分数偏小,气体热值略偏小。然后结合沈阳某生物质气化燃烧供热系统中的气化原料,模拟分析了气化温度、空气当量比（ER）、碳的转化率和气化压力等因素对干气体产率、气体成分、气体热值和气化效率等的影响。对于自供热气化炉,在气化温度增加的过程中,干气体产率增加,气体热值和气化效率下降;在空气当量比（ER）增加的过程中,气化温度和干气体产率增加,气体热值和气化效率下降;在C的转化率增加的过程中,气化温度下降,干气体产率、气体热值和气化效率均增加;在气化压力增加的过程中,气化温度和气体热值增加,干气体产率和气化效率下降。对气化温度、空气当量比（ER）和气化压力等对干气体产率、气体热值和气化效率等的影响力度进行对比分析之后,以空气当量比（ER）为变量进行了灵敏性分析。通过对甲烷体积分数的修正,模拟得出稻壳气化综合效果最佳时的空气当量比（ER）。最后预测了此时的气化温度、干气体产率、气体热值和气化效率。更多还原

【Abstract】 Biomass is a renewable and environment-friendly energy resource. As a main technology of using biomass energy, biomass gasification is of great research significance. An overall idea of simulating biomass gasification using ASPEN PLUS software is proposed in this thesis,then three flowsheets are also established.After comparation and analysis, one flowsheet is selected. Compared with literature data,the simulation data has higher hydrogen volume fraction, lower methane volume fraction and slightly lower heating value.Based on the gasification material which is used in a biomass gasification combustion and heating system in Shenyang, some simulation analysises of the gasification temperature, equivalence ratio (ER), carbon conversion efficiency and gasification pressure are took on the yield of dry gas, gas composition, heating value and gasification efficiency.In a heat-self-supporting gasifier , when the gasification temperature increases, the yield of dry gas increases, while the heating value and the gasification efficiency decrease. When the equivalence ratio (ER) increases,the gasification temperature and the yield of dry gas increase, while the heating value and the gasification efficiency decrease. When carbon conversion efficiency increases,the gasification temperature decreases, while the yield of dry gas , the heating value and the gasification efficiency increase. When the gasification pressure increases, the gasification temperature and the heating value increase,while the yield of dry gas and the gasification efficiency decrease.After the effecting degree of gasification temperature, equivalence ratio (ER) and gasification pressure on the yield of dry gas, heating value and gasification efficiency are compared and analysised,several sensitivity analysises are took on the variation of equivalence ratio (ER). After the volume fraction of methane is modified,the simulation gets the best equivalence ratio (ER) for rusk gasification,and finally gets the simulation prediction of the gasification temperature, the yield of dry gas, heating value and gasification efficiency.更多还原