摘要
针对燃煤机组SCR脱硝常见问题,设计一套智能多点采样系统,包括双管采样系统、风冷单元系统和流量平衡单元,并在350 MW机组进行现场调试与应用。结果表明,SCR智能多点采样系统所测得断面平均质量浓度具备代表性,能够满足运行监控和环保监测精度要求,保证了测量数据的及时性和准确性,能提前将SCR出口NO_(x)质量浓度信号反馈至机组喷氨运行控制中,有效缓解SCR脱硝系统出现的反应器出口NO_(x)质量浓度分布偏差大、局部氨逃逸高及空预器堵塞等影响机组安全经济运行的问题。
In view of the common problems of SCR denitration in coal-fired units,a set of intelligent multi-point sampling system is designed,including double-tube sampling system,air-cooling unit system and flow balance unit,and is tested and applied in 350 MW units.The results show that the average concentration of the section measured by the SCR intelligent multi-point sampling system is representative,can meet the accuracy requirements of operation monitoring and environmental protection monitoring,and ensure the timeliness and accuracy of the measured data,The NO_(x)concentration signal at the SCR outlet can be fed back to the ammonia injection operation control of the unit in advance,which can effectively alleviate the problems that affect the safe and economic operation of the unit,such as large deviation of NO_(x)concentration distribution at the reactor outlet,high local ammonia escape and blockage of the air preheater in the SCR denitration system.
作者
邓悦
DENG Yue(China Datang Northwest Electric power test and Research Institute,Xi’an 710065,China)
出处
《洁净煤技术》
CAS
CSCD
北大核心
2024年第S02期255-259,共5页
Clean Coal Technology
关键词
脱硝
多点采样
NOx质量浓度
denitration
multi-point sampling
NOx concentration
