浙江电力
浙江電力
절강전력
ZHEJIANG ELECTRIC POWER
2015年
8期
45-48
,共4页
燃煤锅炉%脱硝%液氨蒸发系统%进口调节阀%堵塞
燃煤鍋爐%脫硝%液氨蒸髮繫統%進口調節閥%堵塞
연매과로%탈초%액안증발계통%진구조절벌%도새
coal-fired boiler%denitrification%liquid ammonia evaporation system%inlet control valve%blockage
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。
蘭溪電廠600 MW機組鍋爐SCR脫硝繫統在運行中頻繁齣現液氨蒸髮繫統進口調節閥後管路堵塞，引起脫硝繫統供氨量下降，導緻脫硝效率下降甚至脫硝繫統退齣運行。通過分析堵塞的主要原因，提齣採取繫統改造﹑定期維護和運行方式調整等措施，實施後液氨蒸髮器齣口氨氣壓力恢複至設計值。通過對液氨蒸髮繫統進口調節閥後管路內雜質的化學成分﹑存在原因及形成機理進行詳細分析，製定併實施相應的防範措施，保證瞭脫硝繫統的正常運行。
란계전엄600 MW궤조과로SCR탈초계통재운행중빈번출현액안증발계통진구조절벌후관로도새，인기탈초계통공안량하강，도치탈초효솔하강심지탈초계통퇴출운행。통과분석도새적주요원인，제출채취계통개조﹑정기유호화운행방식조정등조시，실시후액안증발기출구안기압력회복지설계치。통과대액안증발계통진구조절벌후관로내잡질적화학성분﹑존재원인급형성궤리진행상세분석，제정병실시상응적방범조시，보증료탈초계통적정상운행。
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 ammo-nia 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.
