The Hiller-DDF series are used for ‘drilling mud’ in vertical exploration drilling and in the horizontal drilling of tunnels for the construction of roads, railroads and metro lines, pipework tunnels and to clean bentonite, barite, and drilling polymer cuttings when hydro-shield driving techniques are used.
Modern tunnel boring machines (TBM) can have diameters of 14 meters and more.
In hydroshield technology, the progressing tunnel is sealed from the tunnel excavation front by means of continuous recirculation of a bentonite slurry. At the same time, this slurry also serves as carrier for removal of the cuttings from the excavation front to the solids separation plant.
Even with variable slurry inputs, DDF decanters, with their hydraulic scroll drive systems and modern accurate SEE controllers, offer a wide range of speeds to allow for the efficient and effective processing of slurry muds.
In these demanding applications where reliability is of the highest importance for unhindered tunnel progress and performance is equally important due to increasingly strict environmental legislation and rising landfill costs, the Hiller DDF high performance centrifuges are the first choice.
For vertical drilling applications, Hiller offer standardised multi-purpose machines, as well as customised designs which are optimised for your specific requirements. Contact us today to find out more about our solutions.