中国电力 ›› 2015, Vol. 48 ›› Issue (2): 21-26.DOI: 10.11930.2015.2.21

• 发电 • 上一篇    下一篇

积灰及迎面风速对直接空冷机组性能的影响

王丽1,张义江1,郭民臣2,纪执琴2   

  1. 1. 神华国能蒙东能源有限公司,内蒙古 海拉尔 021000;
    2. 华北电力大学 能源动力与机械工程学院,北京 102206
  • 收稿日期:2014-11-23 出版日期:2015-02-25 发布日期:2015-11-30
  • 作者简介:王丽(1974—),男,河北霸州人,助理工程师,从事火力发电厂技术管理及生产管理工作。E-mail:wangl_74@163.com

Effects of Ash Deposition and Face Velocity on the Performance of a Direct Air-Cooling Power Unit

WANG Li1, ZHANG Yijiang1, GUO Minchen2, JI Zhiqin2   

  1. 1. Shenhua Guoneng Mengdong Energy Corporation Limited, Hailaer 021000, China;
    2. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
  • Received:2014-11-23 Online:2015-02-25 Published:2015-11-30

摘要: 直接空冷凝汽器积灰和迎面风速降低是影响机组背压上升的主要因素,机组背压升高会影响机组出力。以某330 MW直接空冷机组为例,分析了积灰和迎面风速对传热系数和机组背压的影响规律,并提出了防治措施。结果表明:当积灰厚度达到1.0 mm时,机组背压由设计值34.0 kPa升高到49.0 kPa,机组功率降低了8.6 MW;迎面风速由设计值2.2 m/s降低到1.6 m/s,机组背压由设计值34.0 kPa升高到50.1 kPa,机组功率减小了9.4 MW。

关键词: 火电厂, 直接空冷机组, 积灰, 迎面风速, 传热系数, 机组背压, 机组出力

Abstract: Ash deposition and face velocity reduction are the major factors which cause the backpressure increase of direct air-cooling power units. In this paper, the effects of ash deposition and face velocity on the backpressure and heat transfer coefficient are analyzed taking a 330-MW direct air-cooling power unit as a case and the preventive measures are proposed. The results show that as the ash thickness reaches 1.0 mm, the backpressure increases from the designated 34.0 kPa to 49.0 kPa , and the power output decreases 8.6 MW; when the face velocity drops from 2.2 m/s to 1.6 m/s, the backpressure increases from the designated 34.0 kPa to 50.1 kPa and the power output decreases 9.4 MW.

Key words: thermal power plant, direct air-cooling unit, ash deposition, face velocity, heat transfer coefficient, backpressure, power output

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