The Art of Dredging

Dredging and shipping

Hoppernozzles

In relation with a previous article on hoppernozzle engineering, I publish here a Powerpoint presentation on observations onboard "Gerardus Mercator",  2002, on the use and layout of hoppernozzles, in a -succesful- attempt to reduce restload.

Some idea's are obsolete, but the presentation gives a good impression what goes on in the hopper during discharge; "a symphony of water and sand".

Furthermore, "Gerardus" was equipped with doors, to allow the sand-water mixture into the selfemptying channels.

Hopperdredgers nowadays are mostly designed with a system of suction bends and valves, with other problems and opportunities.

 

 "Dossier Hoppersproeiers"     (downloadable pdf, 3 Mb)

   

Marc Van de Velde

10/2010 

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