During equipment operation, particulate matter (or paint mist) is drawn into the high-speed swirl conduit device by the force of the vacuum fan, where particulate matter, cyclone, and water undergo a gas-liquid emulsification reaction at high speed. The high-speed operation of the pneumatic mixing device allows the particulate matter to mix with the rotating liquid, achieving separation under the action of centrifugal force and the conduit device. The internal part of the cyclone drum is supplied with water by a pump for circulation, which is emitted from the non-blocking nozzle installed at the bottom of the water-separation layer. The separated dust particles settle at the bottom of the water tank, from where the residue can be removed from the slag pool. The separated gas enters the filling material water-separation layer, then proceeds to the subsequent waste gas treatment equipment. The cyclone spray tower achieves a high particle purification rate.