Pneumatic type high-expansion foam de-duster

The utility model discloses a pneumatic type high-expansion foam de-duster which comprises a high-pressure cylinder and is characterized in that: the tail part of the high-pressure cylinder is respectively communicated with a foaming agent feeding device and a high-pressure air inlet device; a porous foaming plate is arranged in the high-pressure cylinder along the radial direction of the high-pressure cylinder, so as to divide the high-pressure cylinder into front and rear two sections; and the front end of the high-pressure cylinder is connected with a nozzle through a discharging pipe. According to a theory in fluid mechanics adopted by the utility model, under an action of positive pressure airflow, the foaming agent in a charging barrel can be extracted; an aqueous solution of the foaming agent is uniformly sprayed onto the porous foaming plate of a foam generator; a large quantity of high-expansion foams can be continuously generated and sprayed onto a dust source; or the pneumatic type high-expansion foam de-duster can be mounted on a coal mining machine for reducing the dust concentration during the mining process.