Abstract: Through the test on dust removal efficiency of Wet-FGD, the major contributing factors are studied, in which FGD exhibits outstanding performance in dust removal under conditions of higher inlet dust concentration. Presently, the comprehensive dust removal efficiency reaches as high as about 50%. Meanwhile, under normal conditions, the mist contents in FGD’s outlet flue gas are higher than the designed value, hence the solid particles in the mist is one of the key factors which leads to the low dust removal efficiency. Therefore, several enhancement techniques are proposed to improve the dust removal efficiency of FGD system such that the collaborative dust removal can be realized in FGD system, which can also inspire new ideas for the subsequent FGD retrofit work.

Key words: coal-fired power, wet-FGD, collaborative dust removal effect, mist eliminator retrofit, sprinkler system optimization