生物质气流床气化前的处理工艺

针对生物质气化过程面临的问题，利用慢速热解方法作为生物质气流床气化的前处理工艺并考察其可行性. 分析讨论了热解后半焦的化学组成和输送特性，并使用ASPEN PLUS模拟软件计算比较了原料与半焦的气化结果. 结果表明，半焦的能量密度随热解温度的升高而升高；热解温度在300~400℃之间，半焦的质量产率和能量产率对于气化工艺比较有利；热解后半焦的内摩擦角、休止角明显降低，堆积密度明显提高. 使用ASPEN PLUS模拟软件进行计算比较，热解温度为400℃时的气化效果最理想.

Pretreatment Technology of Biomass Entrained Flow Gasification

Slow pyrolysis as the pretreatment technology before biomass entrained flow gasification was experimentally studied, and its feasibility assessed. The chemical composition and conveying characters of semi-char produced in the pretreatment were analyzed. At the same time, the entrained flow gasification results of biomass and semi-char were compared based on ASPEN PLUS software. The results show that the energy density of semi-char increases with the pyrolysis temperature. The mass and energy yields of semi-char are beneficial to the biomass entrained flow gasification with the pyrolysis temperatures between 300 and 400℃. The angle of internal friction and angle of repose decrease obviously with increasing the pyrolysis temperature. And the bulk density of semi-char is improved evidently with increasing the pyrolysis temperature. Based on the analysis with ASPEN PLUS, the entrained flow gasification result is most ideal when the pyrolysis temperature is 400℃.