徐书德,卢泓樾
XU Shude,LU Hongyue

• 1:浙江浙能兰溪发电有限责任公司

摘要(Abstract)：

兰溪电厂600 MW机组锅炉SCR脱硝系统在运行中频繁出现液氨蒸发系统进口调节阀后管路堵塞,引起脱硝系统供氨量下降,导致脱硝效率下降甚至脱硝系统退出运行。通过分析堵塞的主要原因,提出采取系统改造、定期维护和运行方式调整等措施,实施后液氨蒸发器出口氨气压力恢复至设计值。通过对液氨蒸发系统进口调节阀后管路内杂质的化学成分、存在原因及形成机理进行详细分析,制定并实施相应的防范措施,保证了脱硝系统的正常运行。
Pipeline after inlet control valve of liquid ammonia evaporation system is frequently blocked during operation of SCR denitrification system in 600 MW units boilers in Lanxi Power Plant, which reduces ammonia supply of denitrification system and results in low denitrification efficiency and shutdown of denitrification system. The paper suggests taking measures such as system retrofit, regular maintenance and adjustment of operation mode, after which ammonia pressure at the outlet of liquid ammonia evaporation system restores to the designed value. By analyzing chemical composition, reasons and formation mechanism of impurities in the pipeline after inlet control valve of liquid ammonia evaporation system, the paper formulates corresponding preventive measures, ensuring normal operation of denitrification system.

关键词(KeyWords)： 燃煤锅炉;脱硝;液氨蒸发系统;进口调节阀;堵塞
coal-fired boiler;denitrification;liquid ammonia evaporation system;inlet control valve;blockage

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 徐书德,卢泓樾
XU Shude,LU Hongyue

DOI: 10.19585/j.zjdl.2015.08.012

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