QCDM series Pulse bag dust collector with long bag and low pressure is a Pulse bag dust collector specially developed in the 1990s on the basis of Jet Pulse dust removal technology to meet the demand of large air volume purification. It is a large dust collector with large air volume, good ash cleaning effect, high dust removal efficiency, reliable operation, maintenance and small area. Widely used in metallurgy, iron and steel, electric power, chemical industry, machinery, building materials and other industries of large air volume flue gas purification.