Flat bag-type dust collector

The utility model relates to the technical field of gas environmental protection equipment, in particular to a flat bag-type dust collector, which comprises a back-blowing ash removal device, the back-blowing ash removal device comprises a gas bag and a plurality of blowing pipes communicated with the gas bag, the blowing pipes are arranged perpendicular to the long edge of a tubesheet hole, a plurality of nozzles are arranged on the blowing pipes, and the nozzles are communicated with the gas bag. And each nozzle is arranged corresponding to one pattern plate hole. The blowing device has the beneficial effects that each blowing pipe can cover a large number of tubesheet holes, so that the number of the blowing pipes is reduced, the structure is simplified, the horn mouth can be accurately aligned with the tubesheet holes, the back-blowing efficiency is high, blowing is controlled through the pulse valve, automation or intelligence can be realized, dust can be automatically removed according to the dust amoun