• Manufacturer: Sulzer Escher Wyss, Germany
• Type: HD4
• Capacity: 210 t/d
• Year of make: 1991
• Status: dismantled, stored in our warehouse Hanovice, CZ
• Condition: very good condition

• Consists of:
  • Heating screw
  • Screw conveyor, driven by a 11 kW motor SEW – EURODRIVE. Length cca 5 m.
  • Disperger Sulzer HD4
  • Motor Helmke, Germany 950kW, 1000 rpm, 6000 V
  • Screw conveyor, working at 11% consistency with flow 1272 l/min
• Not included/ out of scope:
  • Screw press or other suitable thickener
  • Screw conveyor and heating screw motor

Process description:

After adjusting the concentration to approx. 4%, the waste paper stock from the weighing vat is fed to the dispersion system by means of a pump with adjustable rotations. The stock dehydrated in the press until it is dry, approx. 30%, is directed to the heater, and the filtrate flows by gravity to the reservoir of fibrous water (dirty filtrate). The dehydrated stock, after heating with steam to a temperature of approx. 90 – 95 oC, drops into the screw feeding it to the disperger, where it is finally homogenized. From the disperger, the recycled stock is transported by a screw conveyor to the ladle after the dispersion feeding the dense stock pump. In order to obtain a higher whiteness of the stock, a second part (2/3) of hydrogen peroxide H2O2 will be dosed in front of the screw feeding the disperger. The first part of the peroxide is added to the pulper beforehand.