摘要
燃煤电厂为积极响应国家政策,满足超低排放要求,纷纷加入设备升级与改造行动计划中。国电泉州热电有限公司超低排放改造后,以满足NOX排放浓度<50 mg/Nm3,SCR系统运行负担重,氨逃逸率难控制,加剧了空预器堵塞;同时,锅炉BC、DE配风层周围水冷壁易出现结焦。为解决上述问题,通过在负荷230 MW下进行煤粉试验、风门调整优化试验,试验结果表明:R90在11%~16%;SOFA风门开度先开满下部风门之后逐层增加的方式配风;BC、DE辅助风门开度<40%;OFA风门开度<50%的优化配风方式可实现降低NOX排放浓度,还能防止BC、DE配风层周围水冷壁结焦。
In order to respond positively to the national policy and meet the requirements of ultra-low emissions,coal-fired power plants have joined the action plan for equipment upgrading and upgrading.The ultra-low emission transformation of Quanzhou Thermal Power Co.,Ltd.,in order to meet the NOX emission concentration<50 mg/Nm3,SCR the system has heavy operating burden,the ammonia escape rate is difficult to control,and the air preheater blockage is aggravated.The water wall around the boiler BC,DE distribution layer is prone to coking.To solve the above problems,the pulverized coal test and air valve adjustment optimization test were carried out under the load 230 MW.The test results showed that the R90 was between 11%and 16%,and the opening of the SOFA air door was first filled with the lower air door.Then the air distribution mode is increased layer by layer;the BC,DE auxiliary air valve opening<40%;the optimized air distribution mode of 50%OFA the air valve opening can reduce the NOX discharge concentration and prevent the water wall coking around the BC,DE air distribution layer.
作者
沈碧璟
SHEN Bi-jing(State Energy Group Quanzhou Thermal Power Co.,Ltd.,Quanzhou 362804,China)
出处
《应用能源技术》
2020年第11期20-23,共4页
Applied Energy Technology
关键词
SOFA
结焦
NOX排放浓度
优化配风
低氮燃烧器
SOFA
coking
NOX emission concentration
optimized air distribution
low nitrogen burner
