中国电力 ›› 2013, Vol. 46 ›› Issue (9): 24-28.DOI: 10.11930/j.issn.1004-9649.2013.9.24.4

• 循环流化床技术专栏 • 上一篇    下一篇

超临界循环流化床锅炉启动系统节能分析

李鹏   

  1. 华美热电公司,江苏 徐州 221141
  • 收稿日期:2013-03-29 出版日期:2013-09-23 发布日期:2015-12-10
  • 作者简介:李鹏(1983—),男,山东莱芜人,硕士,助理工程师,从事工程建设及设备选型工作。

Energy-Saving Analysis for Startup Systems of Supercritical CFB Boiler

LI, Peng   

  1. Huamei Thermal Power Generation Co., Ltd., Xuzhou 221141, China
  • Received:2013-03-29 Online:2013-09-23 Published:2015-12-10

摘要: 国内外大型超临界循环流化床(CFB)锅炉正处在开发研制阶段,对启动系统的定量计算分析很有必要。基于CFB锅炉的技术特点,以600 MW超临界CFB锅炉为例,将机组冷态启动过程按照重要的节点划分为点火至冲转、热态冲洗、冲转至并网及并网至30%额定负荷等4个阶段,根据各阶段特点采用不同方法进行分析,全面比较了扩容器式和复合式2种启动系统的投资、运行成本和投资回收期。研究结果表明,大气扩容器式启动系统虽然投资和维护费用较低,但启动过程中存在较大的热量损失,600 MW CFB机组锅炉冷态启动1次热损失即高达42.19×105 MJ;随着制造和维护成本的降低,复合式启动系统具有较明显的优势。建议新建600 MW超临界CFB锅炉选用复合式启动系统。

关键词: 循环流化床锅炉, 启动系统, 冷态启动, 超临界机组

Abstract: Nowadays large-scale supercritical circulating fluidized bed (CFB) boilers are still in the stage of development domestically and internationally. Therefore, it is very necessary to carry out quantitative calculation for the analysis of the starting system. Based on the technical characteristics of CFB boilers and taking the 600-MW supercritical CFB boiler for example, the cold start curve from ignition to loading by 30% of rated load is divided into four stages, and the heat loss of each stage is calculated respectively. In addition, economic comparison between flash box startup system and compound startup system is also conducted. The results show that although the investment and maintenance costs of flash box startup system are low, there exists big heat loss during startup as much as 42.19×105 MJ for one cold startup of a 600-MW CFB boiler. With the cost of manufacturing and maintenance decreasing, the compound startup system is more economical, which is highly recommended for 600-MW supercritical CFB boilers.

Key words: CFB boiler, startup system, cold start, supercritical unit

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