The use of compressed air impact cavity produced by ultrasonic ultrasonic, the liquid droplets into a diameter of 1 ~ 50 m dense gaseous dry fog, dry fog can gather dust, the dust particle size increases, increase the weight of the condensed dust will settle down in situ dust. This kind of device key is the ultrasonic dry fog nozzle, the nozzle is an ultrasonic region by air driven liquid through the nozzle to achieve atomization effect.

Port, thermal power plant, chemical plant, iron and steel plant, transfer station, crushing and screening buildings, such as closed and semi closed places of non organization dust emissions.