Cyclone is a class of dust-removing device. In addition to Shen mechanism is to make dust-laden air as a rotary movement, by means of centrifugal force to separate down dust from the airflow and trap in the wall, and then using gravity to dust particles falling into the ash bucket. Cyclones started in 1885, has developed into a variety of patterns. According to their current mode of entry, can be divided into tangential and axial entry type into the type categories. Under the same pressure loss, which can handle the gas is about three times the former, and the airflow evenly distributed. Ordinary Cyclones from Simplified, cone and into the exhaust pipes so on. Cyclones simple structure, easy manufacture, installation and maintenance management, equipment investment and operating costs are relatively low, has been widely used to separate from the flow of solid and liquid particles, or the separation of solid particles practitioners body weight. In normal operating conditions, the centrifugal force acting on the particles is 5 ~ 2500 times gravity, so the efficiency of cyclone significantly higher than gravity settling chamber. Mostly used to remove more than .3 μm particles, parallel multi-pipe cyclone dust collector unit of the 3μm particles also have 80 ~ 85% of the collection efficiency. Use high temperature, corrosion and wear special clothing constructed of metal or ceramic materials, cyclone dust collector can be at temperatures up to 1000 , pressure of up to 500 × 105Pa under the conditions of operation. From a technical and economic aspects to consider cyclone pressure loss control range is generally 500 ~ 2000Pa