华电技术 ›› 2013, Vol. 35 ›› Issue (2): 42-45.

• 技术交流 • 上一篇    下一篇

火电机组冷端系统运行经济性分析及优化

张克凡1,黄锦涛2,闫水河1   

  1. 1.内蒙古呼和浩特金桥电厂,内蒙古呼和浩特 010070; 2.西安交通大学能源与动力工程学院,陕西西安 710049
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2013-02-25 发布日期:2013-02-25

Analysis on operation economic efficiency of cold end system of fossil power unit and optimization

ZHANG Kefan1, HUANG Jintao2, YAN Shuihe1   

  1. 1.Inner Mongolia Hohhot Jinqiao Power Plant, Hohhot 010070, China; 2.School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2013-02-25 Published:2013-02-25

摘要: 冷端系统是火电厂发电机组重要的辅助系统,它的工作状态和运行特征对整个电站机组的稳定性、安全性和经济性都有较大的影响。以内蒙古某电厂300MW机组为例,分析了几种典型工况下背压变化对机组经济性的影响,重点分析了真空泵工作水温的变化对吸气量、凝汽器压力、机组热耗率及煤耗率的影响。提出了增加一路工业水作为冷却水的改造措施,经测试,改造效果良好,可显著提高机组的经济性

关键词: 冷端系统, 经济性, 真空泵, 背压, 热耗, 煤耗, 冷却水, 优化

Abstract: The cold end system is an important auxiliary system of power generation unit of thermal power plant, and its working condition and operational characteristics influence on stability, safety and economical efficiency of the unit greatly. Taking the 300MW unit of a power plant in Inner Mongolia as example, the influence of the back pressure variation on the unit economical efficiency under several typical conditions was analyzed. The influences of the working water temperature variation of the vacuum pump on the air inflow, the condenser pressure, the heat consumption rate and the coal consumption rate of the unit were analyzed emphatically. A reformation measure was adopted, in which an industrial water flow was added and used as cooling water. The test result shows that the result of the reformation is favorable, and the economical efficiency of the unit was improved obviously.

Key words: cold end system, economical efficiency, vacuum pump, back pressure, heat consumption rate, coal consumption rate, cooling water, optimization