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Pulp Paper & Logistics


ANDRITZ 13


of light rejects, preventing their accumulation in the feed area and extending the life of wearing components. PrimeRotor and foils for


increased efficiency and lower power consumption – The screen can be equipped with the new PrimeRotor, which improves screening efficiency and reduces energy consumption by up to 25 per cent. The foils are interchangeable with any other Andritz foils, and the rotor could be installed in any screen type available on the market. Easier maintenance – Changing baskets and rotors is time-consuming work. The PrimeScreen X uses a new design of drive flange to connect the rotor to the hub, enabling maintenance or replacement to be quick and easy. The clamping system to fix the screen basket in place also enables faster screen basket changes.


Installed motor


PrimeScreen X Competitor’s screen


kW 132 250


Table 2: Motor data comparisons


Reject rate


%


PrimeScreen X


Competitor Inlet


Accept Reject


Inlet


Accept Reject


14.9 13.9 Sticky


sqmm/kg 81,364.3 18,328.4 ---


61,430.5 26,775.9 ---


Stickies


reduction %


77.5


Somerville residual


%


6.92 0.90


56.4


6.28 1.62


---


Table 3. Side-by-side performance data for PrimeScreen X versus a competitor’s screen (screens running in parallel)


Optimised screen basket height-to-diameter ratios – The PrimeScreen X is designed so


that the optimised screen basket height-to-diameter ratios meet the requirements of different


furnishes and applications. This helps to reduce the thickening factors and leads to better control


4


Somerville reduction


% 87.0


Motor load


%


78 69


Power


consumption kW


103 173


Specific energy consumption


kWh/ton 3.50 5.63


74.2


PrimeRotor - new rotor and foil design


Streamlined rotor attachment November/December 2019


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