低低温电除尘器粉尘及SO3协同去除研究

为使燃煤电厂大气污染物超低排放,近年低低温电除尘技术开始得到应用。以浙能温州电厂660 MW机组低低温电除尘器为研究对象,对低低温电除尘器粉尘及SO₃协同去除效果进行了测试,对烟气的常规温度和低低温状态下飞灰比电阻的变化及其除尘提效幅度开展研究。结果表明：烟气冷却器投运后,低低温工况条件下的飞灰工况比电阻值较常规烟气工况降低了1个数量级,烟尘排放质量浓度由6.94 mg/m³降至3.25 mg/m³,达到超低排放要求 ;SO₃脱除率达96.6%。

The In-Depth Research on PM and SO3 Simultaneous Removal by Low-Low Temperature ESP Technique

In recent years, to realize ultra-low emission of air pollutants from coal-fired power plants, the application of low-low temperature ESP technique has just stepped onto the stage. Taking the low-low temperature ESP of 660 MW unit in Zhejiang Wenzhou Power Plant as the research object, the PM and SO₃ simultaneous removal effects of low-low temperature ESP are tested, and the resistivity of fly ash and its impact on dust removal efficiency at low-low and regular temperatures are studied. The results show that since the flue gas cooler is put into operation, the working condition resistivity of fly ash under low-low temperature has been lowered by ten times compared with the regular working conditions. The emission mass concentration of dust has been decreased from 6.94 mg/m³ to 3.25 mg/m³, which meets the ultra-low emissions requirements, and the SO₃ removal rate reaches 96.6%.