Energy saving. closed) Rotor construction (open. Rotor construction. Rotor construction. closed) closed) Ro- Rotor construction (open

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1 speed 1136 rpm = 17.5 m/s vcircumferential foil è ~ 29 speed 682 rpm = 1.5 m/s vcircumferential foil è ~ 24 for example 7 closed) closed) in direct comparison modifying the rotor design from LC to HC Rotor construction (open 5 Trial rotors Rotor construction (open We accept the challenge! presented by Rainer Cornelius With optimized rotor- and foil design for pressure screens Energy saving 4 6 Trial tip speed 588 rpm = 15.3 m/s vcircumferential foil Trial installation HF 5 Rotor construction Trial screen HF 5 Rotor construction (open 4 closed foil number / foil area foil arrangement foil form foil fixing rotor speed rotor design open rotor body + foil arms + foils 1 74 rotor body + foil arms Energy requirement rotor body idle running 8 closed) When designing a rotor according to the request for lowest energy consumption it is necessary to survey the construction design as well as the details of single components: Rotor construction

2 Rotor construction bearing unit idle running rotor body with foil arms with foil arms and foils Foil fixing / foil form Trial screen HF 5 Ø 4 mm round bolt 94 x 21.5 mm foil form 1 Foil fixing / foil form Trial screen HF 5 Rotor rotation direction 5 Ø4 with foil 94 x 21.5 Ø4 with foil 94 x 25.5 Ø4 with foil 115 x 27 4 foil 94 x 21.5 with foil 94 x Trial screen HF 5 rotating direction clockwise (standard) rotating direction counterclockwise 13 Foil arrangement Trial screen HF foils vertical straight foils vertically staggered (CCW) Reasons to choose an open rotor Used mainly with lower circumferential speed Better stock mixing Lower reject thickening Lower tendency to pulsations

3 OCC fractionation 72 BDT/D OCC fractionation 72 BDT/D OF8 / 1 OF8 / 2 Andritz Fiedler Competitors Open rotor QIC PDIA PI PI FIC FFIC Rotor circumferential speed m/s Intermediate chest Current consumption kw OF8 /1 Feed LF SF Feed LF SF Flow l/min FI PDIA Consistency PI PI FIC CSF ml FFIC Long fiber chest Short fiber chest Shive (#.15 Haindl McNett) OF8 /2 R16+R3 (Haindl McNett) FI Shive reduction Long fiber yield OCC fractionation 72 BDT/D OCC screening 52 BDT/D OF8 / 1 long fiber OF8 / 1 short fiber accept coarse screening OF8 / 2 long fiber OF8 / 2 short fiber OCC screening 52 BDT/D Installed Andritz Andritz Rotor circumferential speed reduced from 22 m/s to 18 m/s Capacity unchanged ~ 25 Increased service life of the screen basket Energy consumption 2 Unbleached short fiber screening 9 BDT/D IR # IR # IR # IR # IR # kw

4 Drillscreen baskets Total power consumption [kw/h] Sample point Unit [mm2/kg] [mm2/kg] [] [] Inlet coarse screening Accept MC-slot screening Target No spinning problems in waste paper screening system Reduction in power consumption resulting in cost savings Improved cleanliness for short fiber 1 UV5 Bird M 4 NEW tertiary NEW quarterny Bird M 4 quarterny total total Guaranteed capacities for OCC screening system of 35 BDMT/d for long fiber and 3 BMDT/d for short fiber fractions Targets OCC fractionation screening system, 2, 4, 6, 8, 1, 12, secondary Improvement of sticky removal rate: From 84 to 92 tertiary MC slot screening system secondary Beloit S 32 A Beloit S 32 A Beloit S 48 A Position primary no. 1 primary no. 2 load load new Screen type Beloit S 48 A Beloit S 48 A Beloit S 32 A Beloit S 24 A Beloit S 18 A Position primary no. 1 primary no. 2 load load new 122 shut down Screen type 26 coarse screening system Total annual (33 days) energy savings: 2,977,92 kw / year fine screening system Rorotors Scope of supply (design examples) 25 Barscreen baskets 65 7 Dirt spot reduction Accept capacity: 75 BDT/D Improvement of sticky removal efficiency Guaranteed energy savings: more than 36 kwh Installation of two separate reject screening system for coarse screening and MC slot screening MC slot screening: reduction from slot width #.35 mm to #.2 mm Coarse screening: reduction from hole dia. Ø 1.4 mm to Ø 1.2 mm Targets Ingersoll Rand 21 Milled.15 # Sting Ray rotor accept reject Shive reduction Ingersoll Rand 21 BarRo accept reject BDT/D Energy consumption Pcs./m2 m/s kw BDT/D Consistency RR (mass) Shive Dirt spots Shive reduction Schmutzpunktreduzierung Screen Screen basket Rotor Rotor circumferential speed Current consumption Capacity / screen kw 21 Unbleached short fiber screening

5 OCC fractionation screening system UV5 OCC Fractionation screening system UV5 Scope of supply (design examples) Barscreen baskets Rorotors Competitor Screen basket #.2 mm #.2 mm Rotor OEM Rotor speed [rpm] Power consumption Capacity [BDT/D] Spinning problems yes no Capacity increase [] 3 Energy saving [] OCC Fractionation screening system UV5 Softwood pulp 95 BDT/D Delta 8 Targets Cost savings per year: ~ 1,844,262. Baht (Assumptions: operating days/year x 24 hours x 3 Baht/kWh x 82 kw) Elimination of spinning- / stringing problems Improved rotor and screen basket lifetime Quality improvement of screening line 1 Capacity improvement of screening line 1 Improved screening capacity Unchanged cleanliness Softwood pulp 95 BDT/D Delta 8 Kappa 3 4 x primary Inlet pres. 1.9 bar 32 Softwood pulp 95 BDT/D Delta 8 2 energy saving Higher throughput Shive removal: from 9 to 94 Dirt removal > 3 mm: from 94 to 1 Screen basket Competitor Ø 1.2 mm Rotor Delta rotor #.25 mm Rotor speed [m/s] 24 2 Power consumption [Amp] 2 16 Capacity [BDT/D] Shives (Sommerville.15 mm) [].5 accept.5 Dirt count > 3 mm accept [pcs/ 5 g] ~ ~ 1.4

6 Mixed tropical hardwood 1.3 ADMT/D HI-Q 312 Mixed tropical hardwood 1.3 ADMT/D HI-Q 312 Target Capacity increase from 83 ADMT/D (2 primary screens in operation / 1 screen in standby) to 1.3 ADMT/D (3 primary screens in operation) Improvement of cleanliness in pulp Mixed tropical hardwood 1.3 ADMT/D HI-Q 312 Mixed tropical hardwood 1.3 ADMT/D HI-Q 312 Barscreen baskets Scope of supply (design examples) Rorotors Pulp grade MTHW : Acacia 7 : 3 MTHW : Acacia 7 : 3 Screen basket type milled Slot width [mm].2.17 Rotor Type OEM Sting ray Rotor speed [rpm] Rotor tip speed [m/s] Motor rate [kw] Power consumption / screen Reject rate mass [] Feed consistency [] 3.1 Capacity / 1 pc. primary screen [ADMT/D] Mixed tropical hardwood 1.3 ADMT/D HI-Q 312 Capacity increase of 23 per primary HI-Q 312 screen from 415 ADMT/D to 54 ADMT/D Capacity increase of total screening plant (by usage of 3 primary screens) to 1.63 ADMT/D Increase in consistency from 3.1 to 48 energy savings meaning cost savings of 172,8 USD per year total energy savings of screening system is 45 kw/h (Assumptions: 32 operating days/year,.5 USD/kWh) ROI: the return of investment by usage of Rothan 8 month Improved dirt & shive removal efficiency: secondary stage can handle increased reject rate from primaries We accept the challenge!