一种新的湿式烟气脱硫系统烟囱防腐措施探讨

Research on A New Anticorrosive Technique for Chimney of Wet Flue Gas Desulfurization System

湿式烟气脱硫系统中,由于烟气脱硫后含湿量增加,露点温度升高,大量水蒸汽凝结为小水滴吸收烟气中的二氧化硫,产生大量白雾排放到大气中,对烟囱及周围建筑中的钢结构造成腐蚀。可以通过降低吸收塔入口处吸收液的温度,使其脱硫效率增加,同时使含湿量和露点温度降低,从而有效地防治白雾生成和烟囱腐蚀。

In wet flue gas desulfurization system, increasement of moisture content and dew-point temperature alter flue gas desulfurization change a great quantity of water vapor into small drop of water. These drops of water absorb SO2 of flue gas and produce a great quantity white gas which can seriously corrode steel of chimney and surrounding building. We can debase dewpoint temperature of flue gas by means of decreasing temperature and moisture content of flue gas and increase desuffurization efficiency, thus effectively avoid white and corrosiveness.