DEFLAKING
DESCRIPTION AND PRINCIPLE
The Pulper, first on the stock preparation line, is only desintegrating pulp: It breaks down pulp sheets into fibers and tiny bundles. But, it does not eliminate flakes from waste papers and machine brakes, virgin pulp small knots.

This is the duty of the deflaker.

The stock is therefore better prepared for the refiners and the rest of the stock preparation system, and at relatively low energy consumption.

The deflakers must, through brief intense shearing action (in line operation without recycling) ensure instantaneous and as complete as possible desintegration of the flakes.

This is achieved by successive pres-sure pulses on the stock during its passage between stationary and rotating vanes (conical and concentric).
CONSTRUCTION
MAIN ADVANTAGES
  • Cast iron body and bedplate.
  • Heat treated chromium steel rotor and stator.
  • Hard steel or stainless steel shaft with bushings at stuffbox location.
  • Steel coupling.
  • All stainless steel construction as needed.
  • Wide range of 5 types from 20 to 125 T/D
  • Choice of speed:
  • 1500 rpm so (according to rotor dia)
    = 19-22 m/s
  • (62-72 f/sec) peripheral speed,

or

  • 3 000 rpm so (according to rotor dia)
    = 35-40 m/sec
  • (98-124 f/sec) ;
  • Possibility on on-the-run gap adjustment to:
    • control the deflaking action,
    • absorb more or less power.

The power consumption is linked to the desired deflaking result. Therefore, a small freeness drop can be readily obtained by the deflaker, thus easing the downstream refiners work.

  1. Continuous Pulper
  2. Pumps
  3. High density cleaner
  4. Sorter
  5. Vibrating screen
  6. Chest
  7. 1 500 rpm Deflaker
  8. 3 000 rpm Deflaker

Back to Program Top