Device for extracting solid material on the bed of a body of water, and associated method

摘要

The device of the disclosure comprises an assembly (22) for collecting material on the bed (12) of a body of water (14), a riser (48) for lifting the solid material, and a pump (90) for lifting the solid material collected by the collection assembly (22) in the riser (48) towards the surface facility (26). The device also comprises a separator (42) for generating a stream having a high content of solid material and a stream having a low content of solid material, the separator (42) including a lower outlet (76) for discharging the stream with high content of solid material. The device comprises an upstream hose (40) connecting the collection assembly (22) to the separator (42), and an intermediate pipe (44) connecting the or each discharge outlet (76) of the stream with high content of solid material to the riser (48), the delivery outlet (100) of the pump being tapped into the intermediate pipe (44).

主权项

1. A device for extracting solid material on the bed of a body of water, of the type comprising:
an assembly for collecting material on the bed of the body of water; a riser for lifting the solid material up towards a surface facility; a pump capable of pumping a liquid, designed for lifting the solid material collected by the collection assembly in the riser towards the surface facility, the pump having an intake inlet and a delivery outlet; wherein the device comprises:
a separator, to be used for processing the collection stream received from the collection assembly in order to form a stream having a high content of solid material and a stream having a low content of solid material, the separator including an injection inlet for injecting the collection stream, and at least one lower discharge outlet for discharging the stream with high content of solid material;an upstream flexible hose connecting the collection assembly to the separator; andan intermediate pipe connecting the or each discharge outlet for discharging the stream with high content of solid material and a lower section of the riser, the delivery outlet of the pump being tapped into the lower section of the riser or into the intermediate pipe.