The invention relates to a
blast furnace coal gas overlong pulse bag type
dust collector, which comprises a
dust collector barrel, a filter bag and a blowing device, wherein the side wall of the
barrel is provided with an air inlet and an air outlet; the filter bag is arranged in the
barrel above the air inlet and below the air outlet; the blowing device comprises air distributing boxes, at least one pulse valve arranged at inlet of each air distributing box and a main blowing
pipe; the main blowing
pipe is provided with a plurality of spray nozzles along the axial direction; the
diameter of the barrel is 2,600-5,000 millimeters; the length of the
fiber bag is 12-16 meters; and the
diameter of the filter bag is 130-180 millimeters. In the
blast furnace coal gas overlong pulse bag type
dust collector, an overlong bag technology is introduced, the structural size of the barrel and a corresponding air inlet
system are optimized, modularization and fast assembling of a product are realized finally, the
processing and transporting costs are reduced, and the technology and costs of the
blast furnace coal gas overlong pulse bag type dust collector are completely superior to those of the conventional large barrel blast furnace
coal gas dry process bag type dust collector.