Power Generation Technology ›› 2022, Vol. 43 ›› Issue (1): 168-174.DOI: 10.12096/j.2096-4528.pgt.20030

• Power Generation and Environmental Protection • Previous Articles    

Performance Evaluation and Analysis of Key Parameters of SCR Ultra-low Emission for 1 000 MW Coal-fired Unit

Qianwei FENG1, Renhan ZHU2, Sida XU1, Bo LIU1, Yang ZHANG1, Fengji WANG1, Yue ZHU1   

  1. 1.Huadian Electric Power Research Institute Co. , Ltd. , Hangzhou 310030, Zhejiang Province, China
    2.Fujian Branch of China Huadian Corporation Ltd. , Fuzhou 350512, Fujian Province, China
  • Received:2021-06-08 Published:2022-02-28 Online:2022-03-18
  • Supported by:
    National Key Research and Development Project of China(2017YFB0603201-03)

Abstract:

1 000 MW coal-fired unit, as one of the best domestic advanced units, the performance evaluation and analysis of the key parameters of its denitrification unit after the ultra-low emission reformation can provide reference and guidance for stable and safe operation of selective catalytic reduction (SCR) flue gas denitrification unit under ultra-low emission of coal-fired units. Taking the SCR denitrification unit of a 1 000 MW coal-fired unit that had achieved ultra-low denitrification emission as an example, the key operating parameters of the SCR denitrification unit were studied, such as denitrification efficiency, NO x concentration distribution at the inlet and outlet, ammonia escape, etc., the main performance of the denitrification unit was analyzed. The test results show that the overall performance of the SCR denitrification unit is good after the ultra-low emission transformation, but the problems of poor flow field uniformity and excessive ammonia escape still exist. Therefore, the adjustment of low nitrogen combustion, the optimization of ammonia injection, the uniformity test of flow field and the life-cycle management of catalyst should be strengthened.

Key words: 1 000 MW coal-fired unit, selective catalytic reduction (SCR), ultra-low emission, performance evaluation

CLC Number: