Non Self-Propelled Cutter Suction Dredger
Suction Pipe Diameter: 1.2m
Mud Pipes: 1.1m
Total Device Power: 22209kw
Transmission distance: 6000m
Dredging equipment can be divided in Mechanical Dredgers and Hydraulic Dredgers. The differences between these two types are the way that the soil is excavated; either mechanical or hydraulic.
Hydraulic digging make use of the erosive working of a water flow. For instance, a water flow generated by a dredge pump is lead via suction mouth over a sand bed. The flow will erode the sand bed and forms a sand-water mixture before it enters the suction pipe. Hydraulic digging is mostly done with special water jets on soils such as silt, sand and gravel.
Mechanical digging by knives, teeth or cutting edges of dredging equipment is applied to cohesive soils.
Pile-driving, hook work, foundation-drilling and many other marine construction operations are put on a solid footing through the use of Self-Elevating Platforms (SEPs).
Highly-portable, these modular “jack-up” barges provide stable work platforms which effectively eliminate construction downtime due to waves, current and tidal action.
SEPs can operate in land-locked or shallow water areas that are inaccessible to conventional jack-up platforms.
Deepsea Harvesting Vessels
There are two predominant forms of mineral extraction being considered for full scale operations: continuous-line bucket system (CLB) and the hydraulic suction system. The CLB system is the preferred method of nodule collection. It operates much like a conveyor-belt, running from the sea floor to the surface of the ocean where a ship or mining platform extracts the desired minerals, and returns the tailings to the ocean.
Hydraulic suction mining lowers a pipe to the seafloor which transfers nodules up to the mining ship. Another pipe from the ship to the seafloor returns the tailings to the area of the mining site.