Primary particulate diffusion eliminating method and apparatus thereof

A primary particulate diffusion eliminating method and an apparatus thereof belong to the technical field of environmental science and engineering, and relate to a method and an apparatus for implanting unipolarity ions to charge and thicken PM 2.5 by diffusion charging thickening, and trapping to eliminate PM 2.5 primary particulates. The apparatus is characterized by comprising a unipolarity ion generation part, a diffusion charging part and an electron trapping part; the eliminating method is characterized by comprising: implanting the PM 2.5 primary particulates and high-concentration unipolarity ions in a high-frequency high-pressure alternating electric field at a time, thickening into primary particulates each with particle size of larger than 2 [mu]m via diffusion charging coagulation, trapping under the effect of static electric field active force to eliminate pollution of the PM 2.5 primary particulates with elimination rate of 85%-99.8%. An effective method is provided for elimination of PM 2.5 primary particulate atmosphere pollution, also can be used in ultrafine dust diffusion charging pre-coagulation of dedusters, and has the advantages of being high in trapping efficiency, substantially low in initial investment and operation cost and energy consumption, and the like.