【作者】 杨光；

【导师】 苟湘；

【作者基本信息】 河北工业大学 ， 热能工程， 2015， 硕士

【摘要】 我国生物质资源具有储量巨大、来源广泛、成本低廉的特点,极具开发价值。生物质气化技术是一种有效利用生物质资源的方式。生物质气化气可以作为甲醇合成的原料,合成气完成甲醇合成后剩余的CO连同甲醇也可一同作为合成碳酸二甲酯(DMC)的原料,这也就基本构成了以生物质气化合成DMC系统的物料流向。将生物质气化合成甲醇技术与DMC合成技术结合起来可以有效利用生物质资源,同时可以开辟一条DMC合成的新途径。本文以生物质气化为基础设计建立DMC合成的模拟流程并且进行了相应的研究分析。首先本文对系统流程的主要单元建立了模型,其计算结果与文献报道相接近,误差结果在可接受范围内,验证了模型的可行性;其次本文对系统中生物质气化单元、甲烷重整单元、甲醇合成单元和DMC合成单元的主要操作参数进行了优化分析,提出了该模拟流程最佳操作参数。本文对生物质气化合成DMC系统的流程进行了相应研究分析,研究结果表明:对于生物质气化单元,当气化温度为600℃、气化压力为0.1MPa、水蒸气与生物质质量比(S/B)=0.8、CO2与生物质质量比(CO2/B)=0.3时本文研究的气化系统性能最佳;对甲醇合成单元,低温和高压有利于后续DMC的合成,当合成温度为200℃,合成压力为8MPa,循环比为7.0时本文研究的甲醇合成系统性能最佳;对DMC合成操作单元,低温和高压有利于DMC的合成,当合成温度为140℃,合成压力为0.3MPa时本文研究的DMC合成系统性能最佳。每千克生物质原料(稻秸)合成DMC的产率为0.4608Kg,碳转化率为72.7%。更多还原

【Abstract】 As a sort of original abroad and cheap raw material,biomass resource has a promising prospect of developing.The technology of biomass gasification is an efficient utilization of biomass resources.Biogas can be used as the raw material of methanol.After the completion of methanol synthesis,the remaining CO can be used as raw material to synthesize DMC along with the methanol,which determines the fundamental direction of material flow in biomass gasification of DMC synthesis process.The optimum combination of gasification based on methanol synthesizing and DMC synthesizing techniques would offer an efficient way of utilizing bio-resources,reduce both fossil material and energy consumption,more importantly,breed possible new techniques in the future.This paper established the simulated process of the biomass gasification for DMC synthesis system and carried out relative computer simulation analysis.Results yielded from the simulation were close to relevant literature reports with the error within a reasonable range,which verifies the feasibility of the model.In this paper the main operation Parameters applied in biomass gasification unit,methane reforming unit,methanol synthesis unit and DMC synthesis unit were scientifically analyzed so that the optimal combination of those Parameters was achieved.As shown by the results of the simulation,biomass gasification unit works best when gasification temperature is 600℃,pressure is 0.1MPa,S/B=0.8 and CO2/B=0.3,methanol synthesis unit works best when synthesis temperature is 140℃,pressure is 3MPa.Under the condition of the best operating Parameters of system,the yield of DMC is 0.4608 Kg per kilogram biomass.The carbon conversion rate is 72.7%.更多还原