Technical Measures to Raise the Inlet Flue Gas Temperature of SCR Reactor

doi:10.11930/j.issn.10.11930.2015.4.36

Abstract

Abstract: The flue gas temperature may have significant impact on the activity of SCR catalyst. The denitrification system will have to be turned off from service when the flue gas temperature falls down below the allowed minimum commissioning temperature of the catalyst. As it is designed in the conventional denitrification systems, it is not uncommon that the SCR inlet flue gas temperature is lower than the minimum catalyst commissioning temperature at low loads, which will cause the NOx emissions higher than the standard limit. In this paper, in order to make the inlet flue gas temperature of SCR reactor meet the catalyst commissioning conditions in boiler routine operation, the technical measures to raise the inlet flue gas temperature are proposed such as heating by high temperature flue gas, economizer partition arrangement, bypassing the economizer on the waterside and raising the feedwater temperature. In addition, the comparative analysis on the characteristics of these measures is also conducted.

Key words: flue gas denitrification, selective catalytic reduction, inlet flue gas temperature, technical measures

CLC Number:

TM621
X701

XIE Weiyang. Technical Measures to Raise the Inlet Flue Gas Temperature of SCR Reactor[J]. Electric Power, 2015, 48(4): 36-39.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.4.36

https://www.electricpower.com.cn/EN/Y2015/V48/I4/36

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