摘要
经石灰石-石膏湿法烟气脱硫(WFGD)后燃煤烟气中细颗粒物特性会发生显著变化,具体与脱硫工艺有关。基于自行搭建的超低排放实验台及实际电厂测试数据,对WFGD超低排放工艺中细颗粒物的迁移转化特性进行了分析。结果表明:塔入口烟温70℃下塔出口细颗粒物数量与150℃下相比降低约1×10^(6)个/cm^(3);5层喷淋对细颗粒物数量及质量浓度的去除效率提升11.5%和18.9%左右;增设清水喷淋和托盘、采用双循环工艺均有效降低了塔出口细颗粒物质量浓度,其中双塔双循环系统的去除效果最好,出口细颗粒物质量浓度可达10 mg/m^(3)以下。
The characteristics of fine particles in flue gas after the limestone-gypsum wet desulfurization(WFGD)process are very different from those produced by coal-burning,which is related to the desulfurization process.The migration and transformation characteristics of fine particles in flue gas were analyzed by using test data of selfbuilt ultra-low emission test bench and actual power plant.The results show that,the number of fine particulate matters at the tower outlet at 70℃ was about 1×10^(6)/cm^(3) smaller than that at 150℃.Compared with three-layer spraying,the removal efficiency of the number and mass concentration of fine particles of five-layer spraying increased by about 11.5% and 18.9%,respectively.Adding clean water sprayer and tray tower,as well as applying double-cycle system,can effectively reduce the mass concentration of fine particles in flue gas at the tower outlet.Moreover,the double-tower double-cycle desulphurization technology has the best removal effect,the mass concentration of fine particles at the tower outlet can reach lower than 10 mg/m^(3).
作者
臧吴琪
侯大伟
杨林军
ZANG Wuqi;HOU Dawei;YANG Linjun(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,China;East China Electric Power Test&Research Institute,China Datang Group Science and Technology Research Institute Co.,Ltd.,Hefei 230000,China)
出处
《热力发电》
CAS
CSCD
北大核心
2022年第4期127-132,共6页
Thermal Power Generation
基金
国家自然科学基金项目(21276049)。
关键词
湿法脱硫
超低排放
细颗粒物
浓度
迁移转化
wet desulphurization
ultra-low emission
fine particle
concentration
migration and transformation
