Rejects dewatering drum OBN

Rotary rejects dewatering drum OBN-10 is designed for dewatering of washed rejects at separation of impurities from pulper of waste paper and pulper screen PSN and for thickening of unpulped rests discharged into OBN-10 while cleaning the pulper chest.
The rotary dewatering drum parameters are determinated by an actual grade of impurities in waste paper and by a type of these impurities. The dewatering drum OBN-10 capacity ranges from 20 to 60 m³/h and depends on the reject input consistency and the given sort of impurities.
The OBN ingoing rejects should be properly deflaked and washed so that the reject input consistency should be less than 1 %. Afterwards, it is possible to expect the outgoing reject dryness ranging from 15 to 20 % and a quite insignificant loss of fibres. The machine can be used as special accessories for pulper chest cleaning (horizontal or vertical type).

Design

Material

Main parts

• machine frame (1)
  
• with hood (1a)
• safety cover (1b)
• dewatering perforated drum (2), mounted on four rollers
• driving and guiding roller, mounted on pins (3)
• bottom collecting trough
  
• electric motor with gearbox (4) (for drive of roller in stock input part)
• shower tube for cleaning of perforated part of drum (5)

Advantages

• simple design
• easy maintenance and operation
• low consumption of water and electric energy
• min. space requirements
• high separation efficiency
• high dewatering capacity
  

Technical parameters