Indeed not a dredger but probably a pumping station to keep the pressure up in the pipes while dredging over longer distances. Usually equipment without a name.
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I am not sure this is a dredger. It seems the some control equipment fitted at the end of a floating pipe. I believe it is visible on Google Earth, 04/30/2014 layer at 51°41'49.56"N 4°33'43.82"E
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