某600 MW超临界汽轮机上下缸温差大原因分析  

Analysis of Excessive Temperature Difference Between Upper and Lower Cylinder in a 600 MW Supercritical Steam Turbine

作　　者：包伟伟 黄智 李璟涛 袁建丽 曹国庆 邱立新 BAO Weiwei;HUANG Zhi;LI Jingtao;YUAN Jianli;CAO Guoqing;QIU Lixin(SPIC Central Research Institute,Beijing 102209,China;State Power Investment Corporation,Beijing 100033,China;SPIC Baicheng Electric Power Co.,Ltd.,Baicheng 116008,China)

机构地区：[1]国家电投集团中央研究院,北京102209 [2]国家电力投资集团有限公司,北京100033 [3]国家电投集团白城发电有限公司,白城116008

出　　处：《热力透平》2021年第3期200-204,共5页Thermal Turbine

摘　　要：大型火电机组汽轮机高中压缸上下缸温差大是《防止电力生产事故的二十五项重点要求》规定的典型设备故障之一,直接威胁机组的安全稳定运行。介绍了某电厂2号汽轮机上下缸温差大的案例,并对相关过程、处置情况及问题原因进行了详细的论述及分析。结果表明,高中压缸上下缸温差大根本原因在于汽轮机的内部,该问题的出现是汽轮机的特性决定的,造成这种不正常现象的原因是内外缸夹层之间的冷却蒸汽分布出现了较大偏差。研究成果可为解决汽轮机上下缸温差大的问题提供参考。The temperature difference between the upper and lower HIP cylinder of steam turbine is one of the typical equipment failures specified in“25 key requirements to prevent failures in the power generation industry”,which threatens the operation safety and stability of unit.A case of excessive temperature difference between upper and lower HIP cylinder of No.2 steam turbine in a power plant is presented,and the relevant process,countermeasures and the cause of the problem are discussed and analyzed in detail.The results show that the cause of the excessive temperature difference between the upper and lower HIP cylinder is located in the internal part of the steam turbine,and it is determined by the characteristics of the steam turbine.The cause of this abnormal phenomenon may be the large deviation of the cooling steam distribution between the upper and lower inter layer.The research result can provide reference for the solution of the excessive temperature difference between upper and lower cylinder in steam turbine.

关 键 词：600 MW机组 汽轮机 温差 冷却蒸汽 安全性 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]