The product by using gravity and downward flow, by ultra filter cartridge, filter efficiency of submicron particles reaches more than 99.9%, is currently the most ideal dedusting equipment. The device has the advantages of convenient operation, maintenance, replacement of downtime, long service life, low operation cost, the technical level reached the leading domestic level. The device obtained national patent, is a national key new products, promotion project of national environmental protection product best practical technology, high-tech products in Jiangsu province and Jiangsu Province Torch Program projects. The scope of application: The effective purification of dust shipbuilding, steel, nonferrous metals, dyes, food, cement, mining, sand blasting and other industries where the. Technical parameters: