气化剂参数对流化床生物质气化指标影响的模型研究

以典型生物质资源麦秆为原料,采用流化床气化方法,通过建立热力学平衡模型,计算并分析气化剂参数对气化指标的影响,理论优化了以蒸汽+空气为气化剂时的气化指标,得出了空气中氧气浓度的增加能够显著提高气化指标,降低消耗;气化剂预热温度的增加可以增加气化炉操作温度,降低气化过程无用的热负荷,降低消耗;空气中氧气浓度和蒸汽/空气质量比与气化反应温度近似成线性关系,即氧气浓度增加,气化炉温度增加,蒸汽/空气质量比增加,气化炉温度降低;蒸汽/空气质量比能够调节气化炉反应温度和气体组成,当该值在0.05时,气化温度为1 270 K,合成气中CO+H2+CH4体积分数为25.7%,气化指标较好。

Model Investigation on Effects of Characteristics of Biomass Gasification Process Gasifying Agent on

In this paper, the fluid-bed gasification technology is adapted to the conversion of biomass into energy. The gasifying agents characteristics have an important impact on gasification process and the products. A thermodynamics equilibrium model was built to predict the gasification results with typical biomass resource i.e. straw, as raw material. By analyzing the key factors in gasification, an optimization gasification results with the agent of steam and air was drawn. It was found that the steam/air is 0.05 and the temperature was 1 270 K, effective gas component （CO, H2 ,CH4 ） can reach 25.7 %.