The main feature of D-type hydrapulper are the use of the D-type groove and the energy saving Vieques rotor ,both internal and external leaves 25% energy saving to make waste paper and rotor contact more quickly, more frequently .Compared with the traditional hydro-pulper, it could shorten the time of pulp breaking and increase productivity without increasing the volume and momentum..D-type hydro-pulper rotor and the outlet tray is above the pulper tank surface to form a low-pressure flow surrounding the rotor to make the coarse impurities into the dregs well from the heavy dregs mouth with regularly sending under the use of grab.