SUBMERSIBLE DREDGING DEVICE, ASSEMBLY OF A RISER SYSTEM AND SUBMERSIBLE DREDGING DEVICE, VESSEL AND METHOD OF DRIVING A SLURRY PUMP.

摘要

The present invention relates to a submersible dredging device (12) for dredging slurry from a waterbed of a water volume to a water surface, comprising: - a slurry pump inlet (15) and a slurry pump outlet (16); - a slurry pump impeller (25) for transporting the slurry from the slurry pump inlet to the slurry pump outlet; and - a drive assembly (26) for driving the slurry pump impeller; wherein the drive assembly comprises a reinjection channel (2) connecting a drive assembly inlet and a drive assembly outlet, the drive assembly further comprising a drive impeller arranged in the reinjection channel and coupled to the slurry pump impeller so as to drive the slurry pump impeller.