This system is composed of H.C.hydrapulper,hydrapurge I and drum screem.Pulp afer being breaked in H.C.puper is diluted to 5%and then goes into hydrapurge .The pulp is further defiberated in hydrapurge I and the accepts willenter next process-step through screen plate. The trapped coarse-big impuriesandalitte waste paper not being defiberated goes into drum screen.Drum screen recovers fiber and screens/ separates impurities.The combination application of the three machines in this system has many advantages:maintain the interior of the vat of  H.C.pulper clean;overcome such disadvantages as long once slushing time,low intensity of fiber and breaking impurties etc.;achieve optimal defiberating and ink-separating effects;shorten breaking cycle;enhance treating capacity of breaking system.