Screw press
Dewatering is made to thicken the pulp consistency from as low as 3% and up to 35%. A high consistency pulp entering the heating zone will ensure a low steam consumption, and a better dispersion result.
The UCD system consists of only three machines: screw press, infeeder/steamheater, and disperser. This solution offers the most compact design possible, something that saves both plant space and investment cost. Retention time is 5–10 seconds at a temperature of up to 110°C (230°F).
The system is further described below – with treatment steps for dewatering, heating and dispersing.
Dewatering is made to thicken the pulp consistency from as low as 3% and up to 35%. A high consistency pulp entering the heating zone will ensure a low steam consumption, and a better dispersion result.
The Ultra Compact Disperser System consists of only three machines. Pre-heating is made in a combined infeeder steamheater, which is the only step between the screw press and the disperser. This solution offers the most compact system design possible.
The fibers pass through a narrow gap between rotating discs, where any impurities are disintegrated to an invisible size. The devil-tooth pattern of the discs is optimized for each pulp mixture in order to achieve a gentle treatment of the fibers. Adjustment of the disc gap can be done on-line with an accuracy of 0,01 mm.
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