Pulper with a shaft and method for processing composite materials

Abstract

A pulper with a shaft on which a spiral is arranged has been improved to such an extent that it comprises a shaft with a counter-rotating spiral. Preferably both spirals are arranged on the same shaft. This results in extreme friction in the centre of the reaction space of the pulper and thus in an increase in the capacity of the pulper and in an improvement to achieve highly efficient suspension.

1 . A pulper with a shaft on which a spiral is arranged, wherein it comprises a further shaft with a counter-rotating spiral, or the spiral and a counter-rotating spiral are arranged on the same shaft, wherein in each case the spirals are encompassed by a screen basket. 
     
     
         2 . The pulper according to  claim 1 , wherein it comprises a feed screw in the upper region of the pulper. 
     
     
         3 . The pulper according to  claim 1 , wherein radially outside the region between the spiral and the counter-rotating spiral it comprises a slotted basket. 
     
     
         4 . The pulper according to  claim 1 , wherein it comprises a basket of a pressure screening system. 
     
     
         5 . The pulper according to  claim 1 , wherein it comprises a basket that is arranged with different apertures around the spirals. 
     
     
         6 . The pulper according to  claim 1 , wherein it comprises a cylindrical basket. 
     
     
         7 . The pulper according to  claim 1 , wherein it comprises several units arranged one behind the other, with each unit comprising at least one spiral and a screen basket. 
     
     
         8 . The pulper according to  claim 7 , wherein the units are interconnected by means of a passage with a feed screw. 
     
     
         9 . The pulper according to  claim 8 , wherein in the region of the passage an intake is arranged. 
     
     
         10 . The pulper according to  claim 1 , wherein units arranged one behind the other comprise different baskets. 
     
     
         11 . The pulper according to  claim 1 , wherein the units arranged one behind the other comprise baskets with cylindrical hole regions, wherein the axial length of the baskets varies. 
     
     
         12 . The pulper according to  claim 1 , wherein the units arranged one behind the other comprise baskets with cylindrical hole regions, wherein the radius of the baskets varies. 
     
     
         13 . The pulper according to  claim 1 , wherein it comprises a basket with grinding media. 
     
     
         14 . The pulper according to  claim 1 , wherein it comprises a basket with sand as a grinding medium. 
     
     
         15 . The use of a pulper according  claim 1  for processing composite materials, in which use the composite materials are placed in the pulper with grinding media, and wherein location rejects are separated from fibrous materials. 
     
     
         16 . The use according to  claim 15 , wherein sand is used as a grinding medium. 
     
     
         17 . The use according to  claim 15 , wherein after the fibrous materials have been separated the rejects are separated into a plastic-containing fraction and a metal-containing fraction. 
     
     
         18 . The use according to  claim 15 , wherein after the fibrous materials and the plastic-containing fraction have been separated the grinding medium is separated from the metal-containing fraction.