单颗粒燃料燃烧特性研究方法综述

Review of Characterization Techniques for the Combustion Behavior of Individual Fuel Particles

随着环境问题的日益突出,更加清洁高效地将煤炭及生物质燃料转化为电能和热能是当前需要攻克的难题。由于火力发电厂所用燃料颗粒小,燃烧速度较快,湍流燃烧过程复杂,因此深入地了解煤、生物质等固体燃料颗粒的燃烧特性是优化燃烧过程,提高燃料燃烧效率并降低污染物排放的重要前提。该文综述单颗粒煤和生物质等固体燃料的燃烧模型以及数值仿真研究的常用方法,并对热重分析技术、可视化技术和流化床技术等单颗粒燃烧特性实验研究方法的进展和成果进行详细论述。通过对固体燃料颗粒燃烧特性研究难点、研究方法等进行总结对比,提出现有研究方法的局限,进一步探究煤和生物质燃烧特性的研究方向和研究前景。

Converting solid fuels, such as coal and biomass, into electricity and heat energy more cleanly and efficiently is desirable in the power generation industry due to increasingly stringent environmental regulations. The pulverized fuel(PF) particles used in thermal power plants are small in size with very short combustion time under complex and turbulent combustion conditions. Therefore, an in-depth understanding of the combustion characteristics of PF particles is an essential prerequisite for combustion process optimization and reduction in pollutant emissions. This paper reviewed the development of commonly by using mathematic models and the methods for the numerical simulation of the combustion of individual PF particles. Then the state-of-the-art measurement techniques for the characterization of coal and biomass particles, such as thermogravimetric analysis, visualization and fluidization, were described in detail. The difficulties and limitations of existing methods for the combustion characterization of PF particles were also summarized and compared for further research and exploration.