b'STOCK PREPARATIONInstalledMotor load PowerSpecificWhen motor consumption energyopened up consumption for inspection kW % kW kWh/ton during a PrimeScreen X 132 78 103 3.50 shutdown, 10 Competitors screen 250 69 173 5.63 Table 2. Motormonths after data. installation, the slot Reject rate Stickies StickiesSomervilleSomervillewidths and reduction residual reduction profiles were % mm 2 /kg % % % excellent. Inlet 81,364.3 6.92PrimeScreenAccept 18,328.4 77.5 0.9 87.0XReject 13.9 -Inlet 61,430.5 6.28Competitor Accept 26,775.9 56.4 1.62 74.2Reject 14.9 - -Table 3. Side-by-side performance data for PrimeScreen X vs. competitors screen (screens running in parallel).The screen rotor in the the slot widths and profiles were PrimeScreen X was an ANDRITZexcellent. The underside of the LRs design, the screen basket anrotor was also exceptionally clean. ANDRITZ Rejector type (0.6 mm slot),Since that initial inspection, the mill that actually had 21% less open areacontinued to run the screen basket than the Rejector basket in the existingin the PrimeScreen X for 22 months conventional screen. Even with thisbefore changing it.constraint, the PrimeScreen X operated with 5.5% higher capacity and muchCONCLUSIONbetter screening efficiencyespeciallyThe PrimeScreen X is the natural for stickies removal (77.5% stickiesevolution of the ModuScreen reduction with the PrimeScreen X vs.pressure screen family. The targets 56.4% with the existing screen). Side- for this development were to improve by-side comparative data for the twoboth the energy and screening screens is provided in Table 3. efficiency, while making the unit easier to maintain.For this mills coarse screening process, the average screen basketThe PrimeScreen X is exceptional for life in the existing screen was 6-8all screening applicationsbrown months. When the PrimeScreen X wasand white grades, recycled or virgin, opened up for inspection during aincluding coarse, fine, broke, thick shutdown 10 months after installation,stock, and fractionation duties. Figure 3. Streamlined rotor attachment.20 TISSUE TECHNOLOGY INTERNATIONAL'