| 降低SCR脱硝装置最低投运负荷的策略研究 |
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| 引用本文： | 杨青山,;廖永进.降低SCR脱硝装置最低投运负荷的策略研究[J].电力技术,2014(9):153-155. |
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| 作者姓名： | 杨青山 ;廖永进 |
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| 作者单位： | [1]佛山市顺德五沙热电有限公司,广东顺德528000; [2]广东电网公司电力科学研究院,广东广州510600 |
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| 摘 要： | 发电机组低负荷下,锅炉省煤器出口烟温往往达不到SCR脱硝装置运行要求.为解决这一问题,对现有省煤器旁路式解决方法进行分析,找出不足,进而提出了省煤器烟气旁路式和限流式加低温换热器的解决方案.在机组低负荷运行时利用这2种新方法,能够在不影响锅炉效率的前提下,实现脱硝装置稳定、高效运行;对于排烟温度较高的锅炉,采用省煤器限流式加低温换热器的方法,能够有效降低锅炉排烟温度,提高锅炉效率.
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| 关 键 词： | 火电厂 烟气脱硝 选择性催化还原(SCR) 省煤器 排烟温度 |
The Strategy on Reduction of SCR Minimum Operation Load |
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| Affiliation: | YANG Qing-shan,LIAO Yong-jin(Foshan Shunde Five Sand Thermal Power Co., Ltd., Shunde 528000, China;Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510600, China) |
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| Abstract: | Generally,the gas temperature at the outlet of boiler economizer cannot meet the operation requirement of the SCR denitrification device when the generator loading is low.In this paper,the flue gas bypass type or limited flow type economizer with low temperature heat exchanger is proposed to solve the problem based on the analysis of existing bypass type economizer.In this way,the stable and efficient operation of the denitrification device can be realized without lowering down the boiler efficiency in the event of low loads.Moreover,for those boilers with high gas exhaust temperature,adopting the limited flow type economizer and low temperature heat exchanger can not only effectively reduce the boiler gas exhaust temperature,but also improve the efficiency of the boiler. |
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| Keywords: | power plant flue gas denitrification selective catalytic reduction （SCR） economizer gas exhaust temperature |
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