Plasma electro-coagulating and pre-processing device

The utility model discloses a plasma electro-coagulating and pre-processing device, which comprises a plasma generation device and an electrostatic dust removing bag connected onto the inner wall of a dust removing pipeline in sequence; the plasma generation device comprises a positive electrode and a negative electrode symmetrically connected onto the dust removing pipeline; a plurality of keels are arranged in the electrostatic dust removing bag; each keel is connected to a high-voltage electrode; the plasma generation device is also connected to an intermittent electrification control circuit, so that intermittent electrification of the positive electrode and the negative electrode is controlled; and the high-voltage electrode is also connected to a continuous electrification circuit. According to the utility model, heavy metal elements, dust and harmful gas in PM2.5 and smoke are reduced or removed; the toxicity and the dust content of smoke discharged by buildings and industries are reduced; therefore, the environmental pollution is reduced; and the environmental protection benefits are increased.