中国电力 ›› 2016, Vol. 49 ›› Issue (10): 1-6.DOI: 10.11930/j.issn.1004-9649.2016.10.001.06

• 发电 • 上一篇    下一篇

燃煤发电机组锅炉余热利用系统探讨

刘宇钢12,易广宙12   

  1. 1. 清洁燃烧与烟气净化四川省重点实验室,四川 成都 611731;
    2. 东方电气集团东方锅炉股份有限公司,四川 自贡 643001
  • 收稿日期:2016-04-22 出版日期:2016-10-10 发布日期:2016-11-07
  • 作者简介:刘宇钢(1983—),男,陕西渭南人,硕士,工程师,从事电站锅炉性能设计及超净排放方面的研究。E-mail: lyggyl1925@163.com
  • 基金资助:
    “十二五”国家科技支撑计划项目(2015BAA03B01)

Discussion on Waste Heat Utilization System of Coal-Fired Utility Boilers

LIU Yugang1, 2, YI Guangzhou1, 2   

  1. 1. Clean Combustion and Flue Gas Purification Key Laboratory of Sichuan Province, Chengdu 611731, China;
    2. Dongfang Boiler Group Co., Ltd., Zigong 643001, China
  • Received:2016-04-22 Online:2016-10-10 Published:2016-11-07
  • Supported by:
    This work is supported by Key Projects in the National Science & Technology Pillar Program during the Twelfth Five-Year Plan Period (No. 2015BAA03B01).

摘要: 中国火力发电企业对煤耗的要求已经到了毫克必争的阶段。为了深度回收锅炉尾部烟气余热进而提升机组效率,对4种典型的燃煤机组锅炉尾部余热利用系统进行介绍。以某660 MW超超临界机组工程为例,采用等效焓降法,对3种余热利用系统的节能效果进行分析,结果表明:冷风加热器+空气预热器烟气旁路系统的节能效果最佳,其节约煤耗约3.7 g/(kW·h)。

关键词: 燃煤发电, 余热利用, 烟气冷却器, 水媒式烟气-烟气换热器, 冷风加热器, 空气预热器烟气旁路

Abstract: In recent years, it has been highly required for China's thermal power generation enterprises to reduce coal consumption rate to the stage with the accuracy up to milligrams. For the sake of improving the unit efficiency by deeply recovering the waste heat of boiler flue gas, the characteristics of four kinds of coal-fired boiler waste heat utilization system are introduced. Taking a 660-MW USC unit for example, the energy-saving effect of three waste heat utilization systems are analyzed by equivalent enthalpy drop method. The result shows that the cold air heater plus air heater flue gas bypass system has the best energy-saving effect with the coal consumption reduction of about 3.7 g/(kW·h).

Key words: coal-fired power, waste heat utilization, flue gas cooler, WGGH, cold air heater, flue gas bypass of air heater

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