Pulse jet generator, generating device, water injection and blockage removal integrated pipe column and method

The invention provides a pulse jet generator, a generating device, a water injection and blockage removal integrated pipe column and a method. The pulse jet generator comprises a first nozzle, a second nozzle and a third nozzle which are sequentially arranged from top to bottom, wherein a first-stage oscillation cavity is formed between the first nozzle and the second nozzle; a second-stage oscillation cavity is formed between the second nozzle and the third nozzle; the first nozzle, the first-stage oscillation cavity, the second nozzle, the second-stage oscillation cavity and the third nozzlecommunicate with one another in sequence; and stable and continuous fluid flowing in from the first nozzle is converted into pulse jet when flowing through the first-stage oscillation cavity and thesecond-stage oscillation cavity and then is sprayed out from the third nozzle. According to the pulse jet generator, injected water and acid liquor enter a stratum in a fluctuation mode, the water drive swept area is enlarged,