Dust remover capable of preventing ash return pipe from being blocked and engineering machinery dust removal system

The utility model relates to the technical field of ash removal and dust removal, and discloses a dust remover for preventing an ash return pipe from being blocked and an engineering machinery dust removal system. The dust remover is suitable for being communicated with to-be-dedusted equipment and comprises a dust remover body suitable for sucking out dust in the to-be-dedusted equipment; one end of the ash return pipe communicates with the dust remover body, the other end of the ash return pipe extends in the direction away from the dust remover body, and the ash return pipe is suitable for guiding out fly ash; the vibration devices are arranged on the ash return pipe, and the vibration devices are suitable for enabling the ash return pipe to vibrate so as to shake off the fly ash accumulated in the ash return pipe. According to the utility model, the plurality of vibration devices are arranged on the ash return pipe, when the vibration devices are started, the ash return pipe vibrates synchronously under t