Bag-type dust collector ash removal method and device

The invention discloses a bag-type dust collector ash removal method. A bag-type dust collector ash removal device is also provided. The bag-type dust collector ash removal device comprises a bag-typedust collector, a control unit, a signal generator, a transducer and resonance detection equipment, wherein the control unit is used for adjusting the signal generator and controlling the signal generator according to resonance conditions, the transducer is used for converting harmonic signals into sound waves in the bag-type dust collector, and the resonance detection equipment is used for detecting whether the sound waves resonate with air in the bag-type dust collector or not. According to the bag-type dust collector ash removal method disclosed by the invention, the control unit controlsthe signal generator to generate the harmonic signals; the harmonic signals are converted into the sound waves in the bag-type dust collector; whether the sound waves resonate with the air in the bag-type dust collector or not