中国电力 ›› 2018, Vol. 51 ›› Issue (11): 32-37.DOI: 10.11930/j.issn.1004-9649.201806040

• 发电 • 上一篇    下一篇

罗茨–水环泵组在大型直接空冷机组中的应用研究

安亚军1, 张志勇2, 陈瑞君1, 孙健1, 赵自愿3, 申梦岭3   

  1. 1. 内蒙古京隆发电有限责任公司, 内蒙古 丰镇 012100;
    2. 北京能源集团有限责任公司, 北京 100022;
    3. 核工业工程研究设计有限公司, 北京 101300
  • 收稿日期:2018-06-15 修回日期:2018-06-28 出版日期:2018-11-05 发布日期:2018-11-16
  • 作者简介:安亚军(1987-),男,硕士,从事火电厂设备缺陷治理、防磨防爆技术研究,E-mail:anyajun@jinglongpower.com

Study on the Application of Roots-Water Ring Pump in Large Direct Air-Cooling Power Plant ACC System

AN Yajun1, ZHANG Zhiyong2, CHEN Ruijun1, SUN Jian1, ZHAO Ziyuan3, SHEN Mengling3   

  1. 1. Inner Mongolia Jinglong Power Generation Co., LTD., Fengzhen 012100, China;
    2. Beijing Energy Group Co., LTD., Beijing 100022, China;
    3. Nuclear Engineering Research and Design Co., LTD., Beijing 101300, China
  • Received:2018-06-15 Revised:2018-06-28 Online:2018-11-05 Published:2018-11-16

摘要: 为解决应用于火电机组的水环泵汽蚀问题,通过对某600 MW 直接空冷机组抽真空系统出力进行实际测试,提出了水环泵实际运行中存在最大抽吸出力点,并分析了出力降低原因,结合水环泵转子裂纹情况,分析了水环泵汽蚀原因,并在此基础上设计了前置除水罗茨–水环泵组系统,结合测试数据及泵组选型理论,提出了现有泵组的替代方案,新的泵组系统可有效解决汽蚀且节能效果显著。

关键词: 火电厂, 直接空冷机组, 水环泵, 汽蚀, 空气泄漏率, 等温压缩, 压比, 流导

Abstract: In order to solve the problem of cavitation of the electric water ring vacuum pump used in thermal power plants, through the test on the vacuum system output of a 600-MW direct air-cooling unit, this paper proposes that there exists the maximum suction output in the water ring pump operation, and analyzes the reasons why the output may decrease. Then the cavitation of the water ring pump is also investigated associated with the issue of water ring pump rotor cracks. Based on the study, a front dewatering roots-water ring pump group system is designed. By taking the test data and the pump group selection theory into account, an alternative scheme for the existing pump group is put forward, which can effectively tackle the problem and remarkably save the energy.

Key words: thermal power plant, direct air-cooling unit, water ring pump, cavitation, air leakage rate, isothermal compression, pressure ratio, conductance

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