Integration and application of key technologies for ultra-low emission of flue gas in Qiangang Pelletizing Plant
LIU Jian-hui1, FAN Zheng-yun2,3, CHENG Hua4, ZHAO Shi-qi2,3, GUO Zi-jie4, ZHEN Ling5
1. Manager Office, Qian′an Iron and Steel Company of Shougang Co., Ltd., Tangshan 064400, Hebei, China; 2. Beijing Key Laboratory of Green Recyclable Process for Iron and Steel Production Technology, Beijing 100043, China; 3. Department of Iron and Steel Technology, Shougang Research Institute of Technology, Shougang Group Corporation, Beijing 100043, China; 4. Environmental Protection Department, Qian′an Iron and Steel Company, Shougang Co., Ltd., Tangshan 064400, Hebei, China; 5.Environmental Protection Department, Beijing Shougang International Engineering Technology Co., Ltd., Beijing 100041, China
Abstract：In view of the problems in the process of ultra-low emission of flue gas in pelletizing process of Qiangang Iron and Steel Co., Ltd., an integrated pollutant removal process of semi-dry pellet process coupled with SCR high-efficiency denitration was proposed. Through the industrial test, the type of desulfurizer was further optimized, and the ultra-low emission process with lime as desulfurizer was developed. At the same time, using fluid simulation technology, the guide plate and rectifier adapted to the process were developed to realize the homogenization of flow field and temperature field in SCR denitrification device and the control of ammonia escape. Finally, the emission concentration of flue gas particles in pellet process was realized the emission concentrations of SO2, SO2 and NOx are less than 5, 25 and 40 mg/m3 respectively, which can meet the requirements of ultra-low emission for a long time.
刘建辉, 范正赟, 程华, 赵士奇, 郭子杰, 甄令. 迁钢球团烟气超低排放关键技术集成与应用[J]. 中国冶金, 2020, 30(10): 98-102.
LIU Jian-hui, FAN Zheng-yun, CHENG Hua, ZHAO Shi-qi, GUO Zi-jie, ZHEN Ling. Integration and application of key technologies for ultra-low emission of flue gas in Qiangang Pelletizing Plant[J]. China Metallurgy, 2020, 30(10): 98-102.
2020, Vol. 30 
