摘要
通过对燃煤发电机组SCR装置的试验研究发现,SCR装置和静电除尘器的漏风会导致NO_x排放浓度升高现象,SCR装置入口烟气速度偏差和NH_3/NO_x配比不均匀会使氨逃逸增大,脱硝效率下降。SCR装置入口烟气速度、NO_x浓度和NH_3/NO_x配比调平试验可改善SCR装置入口的烟气速度不均匀,降低氨逃逸和NO_x浓度,提高脱硝效率。在试验研究的基础上提出,对于燃煤发电厂SCR装置,需在设备投运之前进行流场优化设计,在设备投运之后定期进行调平试验。
Through the test study on the SCR denitration device in coal-fired power plants, it is observed that the air leakage in the SCR equipments and the electrostatic precipitator cause the NOx emission concentration to increase. Moreover, the differences of flue gas speed and the unevenness of NH3/NOx ratio at SCR device inlet also contribute to the ammonia slip increase and thus lower clown the denitration efficiency. Therefore, the regulation on these parameters is conducted, which can successMly alleviate the unevenness of the flue gas speed, reduce the ammonia slip rate and the NOx concentration and improve the denitration efficiency. Based on the test case study, it is recommended that for the SCR equipments in coal-fired power plants, flow field design should be optimized before commissioning and regulation test should also be conducted periodically after commissioning.
出处
《中国电力》
CSCD
北大核心
2016年第4期23-26,共4页
Electric Power
关键词
NOx
SCR脱硝设备
氨逃逸
烟气速度
优化
NOx
SCR denitration equipment
ammonia slip
flue gas speed
optimization
