Industrial dust has a direct harm to human body. Statistics show that in 2008 the national occupational disease patients reached 730000 people, of which 87.67% of pneumoconiosis. 2013 environmental protection department of occupational health division of the 6 provinces of the 20 stone and furniture industry dust survey shows that almost all factories and most of the workshop dust emissions are seriously exceeded, the stone industry is particularly serious. All post dust concentrations exceeded the national standard, the total dust (refer to the diameter of the 40mm filter, according to the standard dust sampling method to get the highest level of 852 times), call dust (can enter the alveolar dust particles, the aerodynamic diameter of 7.07 m below) the highest concentrations of 77.6 times. Industrial dust not only for the operation of the workers have a direct damage, but also an increasingly serious haze of the formation of the culprit. Dust will seriously affect the life of the device, in addition, the increase in the density of dust in the workshop is also easy to trigger an explosion, in recent years, dust caused by the explosion of the incident. Environmental protection and employee health has been more and more countries, enterprises and the general public attention, in view of the extremely hazardous dust, it is necessary to produce a lot of dust in the workshop is essential, in order to make the air discharge standard, it is necessary to separate and clean the dust from the air