The dust collector is the device used to remove harmful dust in the gas phase, on this basis, increase the desulfurization effect is desulfurization precipitator. 
 Desulfurization precipitator is generally wet desulfurization precipitator, wet desulfurization and dust removal of the water film desulfurization and dust removal, impact Bath desulphurization and dust removal and other. 
 The advantages of wet dust is easy to maintain, and by the preparation of different dust agent to achieve the effect of dust removal and desulfurization (denitrification); drawback is the dust fluid to be treated, may lead to secondary pollution. 
 After years of improvement, has developed into the text venturi-type, cyclone type cyclone cylindrical float type, sieve-type and other types of water film desulfurization precipitator equipment technology matures, its own advantages and shortcomings enterprises according to their own need to use different types.