高温过热器壁温测试及计算  

Test and Calculation of the Tube Wall Temperature of a High-temperature Superheater

作　　者：余艳芝[1] 唐必光[1] 李树雷 

机构地区：[1]武汉大学动力机械学院,湖北武汉430072 [2]平圩发电有限责任公司,安徽淮南232089

出　　处：《热能动力工程》2003年第1期71-73,共3页Journal of Engineering for Thermal Energy and Power

摘　　要：过热器超温爆管是造成火电机组非计划停机的重要原因之一。为全面掌握过热器壁温状况 ,在 410t/h超高压锅炉上实时采集了炉内壁温及炉外壁温的变化情况。在考虑炉膛出口三维烟温、烟速分布的情况下 ,建立了过热器炉内壁温分布的计算模型 ,编写了基于MATLAB语言的三维可视化计算程序。可通过此程序计算得到对流过热器各个管排各部位管壁温度分布 ,并以图形的方式显示烟温、烟速、及过热器管壁温度的立体分布 ,将理论计算结果与试验进行了比较 ,符合较好。Superheater tube explosions resulting from overtemperature is one of the major causes leading to an unscheduled shutdown of thermal power plants. To fully keep track of the situation regarding the superheater tube wall temperature, a real-time acquisition of the tube wall temperatures inside and outside the furnace and their changes was carried out on a 410 t/h super-high pressure boiler. Taking into account the distribution of three-dimensional flue gas temperature and speed, the authors have set up a model for calculating the distribution of the superheater tube-wall temperature inside the furnace and prepared a MATLAB language based three-dimensional visual-display computation program. With the help of this program it is possible to calculate the tube-wall temperature distribution at various locations of the superheater tube rows. Furthermore, one can also obtain a graphic display of the three-dimensional distribution of the flue gas temperature and speed as well as the superheater tube-wall temperatures. The results of a theoretical calculation were found to agree fairly well with those of experiments.

关 键 词：高温过热器 测试 管壁温度 锅炉 计算 电站 

分 类 号：TM621.2[电气工程—电力系统及自动化] TK223.32[动力工程及工程热物理—动力机械及工程]