Apparatus for processing fibrous materials

Abstract

An apparatus for processing fibrous materials, in particular fibrous material with high stock densities in the HC range, such as waste paper. The apparatus has a pulping module for pulping fibrous material into a fibrous material suspension, and a grading module, coupled to the pulping module, for subsequent grading of the pulped fibrous material suspension. The pulping module has a housing and a first rotor arranged in the housing. The grading module has a housing with a screen for separating the fibrous material suspension fed in into accepted stock and reject, and a second rotor arranged in the housing. The first and second rotors are formed as a common rotor.

1 . An apparatus for processing fibrous materials, the apparatus comprising:
 a pulping module for pulping fibrous material into a fibrous material suspension, said pulping module having a pulping module housing and a first rotor with a rotor shaft arranged in said pulping module housing;   a grading module coupled to said pulping module and configured for subsequent grading of the pulped fibrous material suspension, said grading module having a grading module housing with a screen for separating the fibrous material suspension into accepted stock and reject, and a second rotor with a rotor shaft arranged in said grading module housing; and   said rotor shaft of said first rotor of said pulping module and said rotor shaft of said second rotor of said grading module being connected to one another and forming a common shaft.   
     
     
         2 . The apparatus according to  claim 1 , further comprising a heavy-component separation module arranged between said pulping module and said grading module. 
     
     
         3 . The apparatus according to  claim 1 , wherein:
 said pulping module housing comprises a trough formed with a base of partially circular cross section in a lower region extending horizontally along a longitudinal axis;   said first rotor comprises said rotor shaft rotatably mounted about an axis of rotation parallel to the longitudinal axis of said pulping module housing and working elements arranged circumferentially on said rotor shaft and disposed to be brought into engagement with the fibrous material;   said grading module housing comprises a trough extending horizontally along a longitudinal axis and having a base provided in a lower region thereof with a screen that is bent into a partially circular shape in cross section; and   said second rotor comprises a rotor shaft rotatably mounted about an axis of rotation parallel to the longitudinal axis of said grading module housing and clearing elements arranged circumferentially on said rotor shaft and disposed for keeping said screen free and for loosening the reject.   
     
     
         4 . The apparatus according to  claim 3 , wherein said trough of said pulping module housing and said trough of said grading module housing have, at least in a lower region thereof, an inner wall with a partially circular cross section. 
     
     
         5 . The apparatus according to  claim 4 , wherein said inner wall has a semicircular. 
     
     
         6 . The apparatus according to  claim 1 , wherein said rotor shaft of said first rotor of said pulping module and said rotor shaft of said second rotor of said grading module are connected to one another and form a common shaft, and said trough of said pulping module adjoins said trough of said grading module. 
     
     
         7 . The apparatus according to  claim 1 , wherein said rotor shaft of said first rotor of said pulping module and said rotor shaft of said second rotor of said grading module are formed in one piece to form said common shaft. 
     
     
         8 . The apparatus according to  claim 1 , further comprising a drive module for controlling and driving said common shaft formed of said rotor shaft of said first rotor of said pulping module and said rotor shaft of said second rotor of said grading module. 
     
     
         9 . The apparatus according to  claim 8 , wherein said common shaft is configured to be driven at a maximum peripheral speed of less than 10 m/s. 
     
     
         10 . The apparatus according to  claim 9 , wherein said common shaft is configured to be driven at a maximum peripheral speed of less than 5 m/s. 
     
     
         11 . The apparatus according to  claim 1 , further comprising a heavy-component separation module arranged between said pulping module and said grading module, next to said pulping module housing and next to said grading module housing. 
     
     
         12 . The apparatus according to  claim 3 , wherein a smallest radial distance between said working elements and an inner wall of said pulping module housing is about 200 mm, and wherein a radial distance between said clearing elements and an inner wall of said grading module housing is less than 20 mm. 
     
     
         13 . The apparatus according to  claim 12 , wherein the smallest radial distance between said working elements and the inner wall of said pulping module housing is about 500 mm. 
     
     
         14 . The apparatus according to  claim 1 , wherein said grading module is formed with an inflow region configured for the fibrous suspension to flow in below said rotor shaft. 
     
     
         15 . The apparatus according to  claim 14 , wherein said grading module is formed for the fibrous suspension to flow in in a region 15-20 cm below the axis of rotation of the rotor shaft. 
     
     
         16 . The apparatus according to  claim 14 , wherein said screen has a very small height in said inflow region of said grading module and is arranged substantially only in a lower bottom region, or said inflow region has a screen-less configuration and said screen is arranged only downstream of said inflow region in said grading module. 
     
     
         17 . The apparatus according to  claim 1 , wherein said pulping module is formed with an outlet having a lower edge, being a weir edge, and said weir edge is arranged in a range of 0.3 to 1.5 times a shaft diameter of said rotor shaft in said pulping module vertically above the axis of rotation in said pulping module. 
     
     
         18 . The apparatus according to  claim 16 , wherein said rotor shaft of said pulping module has at least one lifting element for conveying fibrous suspension out of said pulping module. 
     
     
         19 . The apparatus according to  claim 16 , wherein a vertical difference in height between said outlet of said pulping module and said inlet of said grading module is formed to ensure that the flow of fibrous suspension from said pulping module to said screen module via said heavy-component separation apparatus takes place without an interposition of a pump. 
     
     
         20 . The apparatus according to  claim 1 , configured for processing fibrous material with high stock densities in a high consistency (HC) range.