CNMC type current pulse blow bag filter is also known as the filter type dust collector, is a kind of dry type high efficiency filter, it USES fiber preparation of objects made of bag filter elements to capture the dust in the gas solid particles. Its action principle is dust orbiting the filter cloth fiber were intercepted by inertia force action collisions with fiber. Tiny dust particles (size of 1 lm or smaller) it is impacted by the gas molecules (Brownian motion) constantly changing direction, due to the gap between the fiber less than the free path of gas molecules Brownian motion, dust particles will collide with the fibre contact is separated out. Its working process and the weaving method of filter material, the density of the fiber and the spread of dust shade, gravity, inertia, and ash removal method and electrostatic factors. Filter cloth material is the key to the bag dust collector; Good performance of the filter cloth, in addition to the specific density and permeability, also should have good corrosion resistance, heat resistance and high mechanical strength, good heat performance of the fiber, the heat resistance at present can reach 250 ~ 350 ℃.
    CNMC type current pulse blow bag filter is according to the different way of soot can be divided into vibrating, counter blowing gas ring, pulse type, sound type, compound 5 types, etc. The pulse counter blowing type according to the different blowing air pressure and can be divided into the high voltage pulse inverse blow type and low voltage pulse inverse blow type two kinds. Back pulse bag type dust collector because of its injection intensity and pulse frequency can be adjusted, soot cleaning effect is good, is currently the world's most widely used of dust removal device. Gases from dust bag filter after the entry into, from the nozzle to each unit room, under the function of guiding device, large particles of dust separation after directly into the hopper, the rest of the dust chamber filter with airflow uniformity in the storehouse district, after filtration of the clean gas through the filter bag by enclosure, lift valve, the exhaust duct discharge. As the working condition of filter, when the dust filter bag surface area reaches a certain thickness, controlled by the ash removal device (differential pressure or timing, manual control) according to the set procedures close the lift valve, control the current unit is offline, and open the electromagnetic pulse valve injection shake off the dust on the filter bag. Fall into the dust ash hopper through the discharge valve discharge, after using the ash conveying system.