超(超)临界大型火电机组技术引进中的核心问题分析  

The Key Issues in the Technology Imports of Ultra-supercritical Pressure Large Size Thermal Power Generating Units

作　　者：李祥苓 张伟[2] 

机构地区：[1]安徽华电宿州发电公司,安徽省宿州市234000 [2]华电国际邹县电厂,山东省邹城市273522

出　　处：《电力设备》2006年第4期26-30,共5页Electrical Equipment

摘　　要：超(超)临界锅炉、汽轮机、发电机三大主机是超(超)临界技术引进中的关键。针对超(超)临界锅炉的特点,介绍了锅炉受热面管型、金属材料、燃烧系统的应用情况和研究现状;汽轮机选型要考虑轴系的稳定性、机组的可靠性和经济性。根据对已投运的超(超)临界机组的分析,认为选择单轴、5缸6排汽或4缸4排汽,汽轮机参数为25.0MPa/600℃/600℃或25.0MPa/600℃/610℃,滑压运行、全周进汽的调节方式,垂直管屏的直流锅炉及额定电压为24kV,冷却方式为水—氢—氢的1000MW级发电机是一种较为科学合理的选择。Ultra- supercritical pressure boiler, steam turbine and generator, three large main equipment are the keys in the ultra- supercritical pressure technology imports.In view of the features of ultra - supercritical boiler,the paper briefs the application situation and present research status of tube type of boiler heating surface,metal materials and combustion system;the type selection of steam turbine should take the stability of shaft system,and the reliability and economics of unit into consideration.Tbe papor,based ripen the analysis of ultra- supercritical traits in operation, holds that,the steam turbine should adopt single shaft,5 cylinders - 6 exhausts or 4 cylinders - 4 exhansts, the parameters of steam tnroine should be 25.0 MPa/600 ℃/600 ℃ or 25.0 MPa/600 ℃/610 ℃ ,with sliding pressure operation and full admission regulation mode;tbe boiler should be once - through boiler with vertical tube penels;tbe rating capacity of generator should be 1 000 MW class,with rating voltage 24 kV and water - hydrogen - hydrogen cooling mode.Ibis is a fairly scientific and rational choice.

关 键 词：超(超)临界火电机组 汽轮机 锅妒 发电机 选型 

分 类 号：TK229.2[动力工程及工程热物理—动力机械及工程]