王曲电厂旋流煤粉燃烧器空气动力场温度场数值模拟

发布时间：2019-01-15 21:57

【摘要】：煤作为我国储量最丰富的化石能源,在我国的能源生产结构中的占据绝对主导地位。随着中国经济的快速增长,国内火力发电工业蓬勃发展。旋流燃烧器由于其着火稳定性好、对煤种适应性广、污染物排放量低的优点近年来备受青睐。并且,随着计算机技术的飞速发展,采用计算机软件来模拟煤粉燃烧状况逐渐发展成一种行之有效的研究手段。由于煤粉燃烧过程是一个复杂的物理、化学过程,准确的描述这一过程需要不断完善数值计算模型。本文针对某双调风旋流燃烧器进行了数值模拟,通过改变内二次风叶片角度、内二次风调节挡板开度,观察分析上述因素对燃烧器区域速度场和温度场的影响,揭示了煤粉气流在燃烧器区域的运动规律。其次,针对混煤掺烧情况做了数值模拟,对温度场和速度场进行分析,并为运行调整做出指导。
[Abstract]:As the most abundant fossil energy in China, coal occupies an absolute dominant position in the energy production structure. With the rapid growth of China's economy, the domestic thermal power generation industry is booming. Swirl burner has been widely used in recent years because of its good ignition stability, wide adaptability to coal and low pollutant emission. With the rapid development of computer technology, the simulation of pulverized coal combustion by computer software has gradually developed into an effective research method. Since the pulverized coal combustion process is a complex physical and chemical process, it is necessary to improve the numerical model to describe the process accurately. In this paper, a numerical simulation is carried out for a double-regulated swirl burner. By changing the angle of the inner secondary air blade and regulating the opening of the baffle, the influence of the above factors on the velocity field and temperature field in the burner region is observed and analyzed. The movement law of pulverized coal flow in the burner region is revealed. Secondly, numerical simulation is made to analyze the temperature field and velocity field, and to guide the operation adjustment.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM621.2

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