Abstract: Due to the emission standards were renovated, the emissions of current electrostatic precipitator operating in coalfired power plant can not satisfy the requirement of new emission standards. The new requirement of environment protection can be satisfied by reformatting the electrostatic precipitator into electrobag composite dust remover, and the reformation is technically feasible. The working mechanism and reformation thought of electrobag composite dust remover were introduced, and it was illustrated by practical examples that the electrobag composite dust remover has more advantages in both technology and economy. 
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Key words: bag-type dust collector, electro-static precipitator (ESP), electro-bag composite dust remover, demands of environment protection, coal-fired power plant