Study on the Validity of NOX Uniformity Thermal State Optimization Adjustment Strategy for SCR Denitration Unit of Coal-fired Power Plant

2019 5th International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Yu, Honghai^1 ; Wang, Zhi^2 ; Li, Chao^1 ; He, Fengyuan^1 ; Qu, Litao^1 ; Wang, Dexin^1 ; Qi, Xiaohui^1 ; Du, Jia^1

Huadian Power Science Research Institute Co., Ltd., Shenyang

110180, China^1

Shenyang Environmental Technology Evaluation Center, Shenyang

110169, China^2

关键词: Coal-fired power plant;    Concentration fields;    Discharge standards;    Economical operation;    Existing problems;    Research object;    Standard deviation;    Thermal optimization;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/295/5/052049/pdf
DOI  :  10.1088/1755-1315/295/5/052049

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to make the NOx stable discharge standard after the ultra-low emission reform of coal-fired power plants, SCR denitration unit safe and economical operation. Taking a 600MW unit as the research object, the effectiveness of the NOx uniformity thermal state optimization adjustment strategy at the outlet of the denitration unit was studied, and the denitration unit inlet and outlet flow fields and NOx concentration field were tested to analyze the existing problems and formulate an optimization plan. The thermal state optimization adjustment, the NOx uniformity of the denitration unit outlet is significantly improved, the standard deviation of the NOx concentration at each outlet of the load section is reduced to below 15% and the ammonia escape concentration is reduced to below 3ppm. The research shows that the thermal optimization adjustment strategy is reliable and effective for improving the NOx uniformity of the SCR denitration unit, and the unit can operate safely and economically.