Blast furnace gas dry dust collector - 17 
 (260 degrees) by the director of the raw gas raw gas manifold into the lower part of the bag filter box break, mechanical separation, gas up through the bag filter fine dust attached to the surface of the bag outside, net gas are brought together through the filter bag on the box, the net gas manifold, into the hot stove when the competent use of the filter after a certain time, with the increase of the dust filter bag surface, dust collector resistance increased when the resistance rises to a certain value, the electrical control system cleaning signal is issued, the export is injected into the trachea of ??branch pipe from the pocket, rapidly expanding line of bag, the bag outer surface of the dust stopped falling, falling into the lower part of the cone-shaped ash hopper, the last injection the end of the pulse valve, dust collector to continue remain stationary, so that the smaller the dust of the cylinder body to a stationary process of settlement, the end of this process, the export branch pipe pneumatic butterfly valves and ball valves open, dust collector into the normal filter state, while the lower part of the ball valve to open by the impeller feeder , a box of cleaning process is completed, all valves open and close in the above process, relatively dust concentration of the single-box testing by the PLC system to control, so that the cycle of work, shortage of gas to be purified.