Gasification of high viscous slurry R&D on atomization and numerical simulation
Gasification of high viscous slurry R&D on atomization and numerical simulation
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DOI：
10.1016/j.apenergy.2011.12.026
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发表时间：
2012-05
期刊：
影响因子：
11.2
通讯作者：
T. Jakobs;N. Djordjevic;S. Fleck;M. Mancini;R. Weber;T. Kolb
中科院分区：
文献类型：
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作者：
T. Jakobs;N. Djordjevic;S. Fleck;M. Mancini;R. Weber;T. Kolb
生物质和低阶燃料气化是一种非常有前景的燃料转化为高质量燃料(合成气)的过程。本文介绍了生物质燃料高压气流床气化炉的设计研究工作。分析了双流体喷嘴的雾化质量与气速和反应器压力的关系。将研制的雾化器用于常压气流床气化炉，考察了喷雾质量对气化过程的影响。建立了高压气流床气化炉的CFD模型。气速和反应器压力对喷雾的索特尔平均直径(SMD)有显著影响。增大气速会降低液滴直径，而增大反应器压力则会增大液滴直径。通过有机碳和甲烷浓度的测量以及沿反应器中心线不同位置的径向温度分布，观察到SMD对气化过程的影响。最后，生物质料浆高压气流床气化的CFD模型表明，液滴尺寸分布对气化质量的影响非常显着。
Biomass and low rank fuel gasification is a very promising process for conversion of fuels to a high quality fuel (Syngas). In the present paper research work on the design of a high pressure entrained flow gasifier for biomass based fuels is shown. Atomization quality of twin fluid nozzles as a function of gas velocity and reactor pressure is analyzed. The developed and characterized atomizers are used in an atmospheric entrained flow gasifier, to detect the influence of spray quality on gasification process. Furthermore, a CFD model of a high pressure entrained flow gasifier was developed. A significant influence of gas velocity and reactor pressure on Sauter Mean Diameter (SMD) of the produced spray was detected. Increasing gas velocity decreases the SMD, whereas increasing reactor pressure leads to the increase in drop diameter. An influence of SMD on gasification process was observed from organic carbon and methane concentration measurements as well as from the radial temperature profiles at various positions along the reactor centerline. Finally the CFD model of high pressure entrained flow gasification of biomass based slurries shows a very pronounced influence of drop size distribution on gasification quality.