MC-II small pulse bag filter is a new type of high efficiency unit improved on the basis of MC-Ⅰ. It has the advantages of large gas processing capacity, stable performance, convenient operation, long filter bag life and small maintenance workload. Our company has made technical improvements on the structure of the dust collector and the electromagnetic pulse valve in combination with the actual use, which solves the problems of open air placement and low compressed air pressure. Applicable to machinery, metallurgy, rubber, flour, chemical, pharmaceutical, carbon, building materials, mining, electroplating and other industries. The selection of single pulse bag dust collector has the following need to pay attention: (1) Dust cleaning device adopts tubular central blowing. (2) The injection pressure has low pressure injection, the pressure is lower than 0.4MPA, and there is high pressure injection, the pressure is higher than 0.4MPA. The kinetic energy of the high-pressure gas source is large, and the gas consumption is small, and the kinetic energy of the low-pressure gas source is small, and the gas consumption is large. Regardless of the pressure of the pulse injection air source, the purpose is to achieve complete ash removal, and the required ash removal energy is the same. (3) The dust-blowing cleaning mechanism is divided into the combination of no drainage nozzle and no venturi, with drainage nozzle and no venturi, and with drainage nozzle and venturi. (4) there are on-line cleaning and off-line cleaning of ash by pulse injection. By adjusting the parameters of the dust collector, the on-line and off-line cleaning can achieve basically the same cleaning effect.