论文部分内容阅读
某电厂600 MW机组切圆燃烧锅炉的温度偏差一直困扰着该机组的安全运行,为研究该锅炉温度偏差的特性,以此锅炉为研究对象,根据其结构、设计和运行参数,利用数值计算软件对炉内流动、传热和燃烧过程进行了三维数值模拟。研究表明,该锅炉炉内的高温区仍集中在炉膛中部,温度的整体分布趋势未变,只要保证温度分布不出现大的偏差,对炉膛的水冷壁是安全的。炉内的温度偏差与速度偏差存在正相关,烟气的残余旋转对炉内的温度分布存在一定的影响。炉膛出口温度分布不仅存在左右温度偏差,也存在上下温度偏差,且高温区集中在水平烟道中上部。
The temperature deviation of tangentially fired boiler of a 600 MW unit in a power plant has plagued the safe operation of the unit. In order to study the characteristics of the temperature deviation of the boiler, the boiler is taken as the research object. According to its structure, design and operating parameters, numerical calculation software The three-dimensional numerical simulation of the flow, heat transfer and combustion in the furnace was carried out. The research shows that the high temperature in the boiler is still concentrated in the middle of the furnace, the overall trend of temperature distribution has not changed, as long as the temperature distribution does not appear large deviation, the water wall of the furnace is safe. There is a positive correlation between temperature deviation and velocity deviation in the furnace, and the residual rotation of flue gas has a certain influence on the temperature distribution in the furnace. Furnace outlet temperature distribution not only exists around the temperature deviation, there is temperature deviation, and the high temperature zone concentrated in the upper part of the horizontal flue.