基于可视化技术的秸秆类生物质灰渣流动特性与机理研究

Biomass is an important renewable energy source. The gas fuel, liquid fuel and solid fuel can be obtained by biomass transformation technology. Gasification technology can enhance the quality of biomass energy effectively. Entrained flow gasification has developed rapidly in the biomass utilization field for its high carbon conversion efficiency. The entrained flow gasifier is operated at high temperature and high pressure. The flow behavior of biomass ash and slag is related to the process parameter setting and operation of gasifier. Based on the entrained flow gasification technology, visualization techniques and analysis techniques are applied to develop the research system. Combined with the heating stage microscope, high-temperature rotary viscometer, XRD, XRF and FactSage software, the fusibility, viscosity temperature characteristics and mineral matter transformation are investigated by experiments. Model for mechanism in the flow behavior is established with the studies on variation laws of gasification process. These studies would provide both the oretical basis and practical guidance for the high efficiency and clean utilization of biomass energy. Some innovative research results are also expected with the execution of the current project.

生物质能是重要的可再生能源，经过转化可获得气态、液态以及固态燃料。气化技术具有有效提升生物质能品质的优点，尤其是碳转化率较高的气流床气化技术，成为发展最迅速的生物质利用技术。气流床气化炉内为高温、高压环境，生物质灰渣流动特性与气化工艺参数设定以及气化炉的操作运行密切相关。本项目拟以气流床气化技术为基础，探索可视化技术，利用高温黏度计、XRD及XRF等分析手段，结合FactSage模拟计算，同时引入高温热台及显微镜，通过探究生物质气化过程中熔融特性、黏温特性与矿物质转化规律，并在研究其特性规律的基础上，建立流动过程机理模型，为高效清洁地利用生物质能源提供理论依据和工业指导。本项目的顺利实施，有望获得具有一定特色的创新性研究成果。

探究生物质灰渣的流动行为，实现可视化对于生物质能的开发和利用具有十分重要的意义。本项目结合了原位反应器与显微镜技术，开展了生物质的可视化研究，实现了热态过程的可视化。基于成像系统和测量分析系统，开展了高温灰与低温灰的流动研究，探究了高温灰和低温灰流动形为与收缩行为。基于热力学平衡软件，开展了高温灰渣流动的机理研究，探究了典型灰中矿物质转化过程与灰渣流动的关联。在国家自然科学基金的资助下，已发表SCI收录论文4篇，培养了1名硕士专业人才。

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