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Parason Group is one of the largest manufacturer & Supplier of pulp and paper machinery. Parason started its first research unit for pulp and paper machinery. http://www.parasonmachinery.com

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Slide 1: 

1 PRATISHTHAN PARASON Parason…..the Refining People

Slide 2: 

2 FINE BAR TECHNOLOGY IN REFINING SYSTEM FOR PULP & PAPER INDUSTRY BY SHEKHAR DESARADA PARASON MACHINERY (I) PVT. LTD. AURANGABAD, INDIA

Abstract: : 

3 Abstract: Refining plays an important role in stock preparation as well as throughput - the complete paper making process. Next to raw material selection, it has the greatest influence on final product quality. The new finer bar width and narrower grooves, resulting in increased cutting edge length (CEL). The finer bar design secures a reduction in specific edge load (SEL) and total power. Obtain optimum strength properties with low intensity refining for Hardwood & Recycled fiber (White Grade) Parason…..the Refining People

Purpose of Refining: : 

4 Purpose of Refining: Brings product properties within specifications. Improve runnability on Paper Machine. Change of Pulp properties More strength properties: Tensile strength, Internal bond. Surface properties: Smoothness, porosity. Other important properties: Formation, Bulk. Parason…..the Refining People

Fibre treatment is predominantly carried out by the EDGE of the bar as under : 

5 Fibre treatment is predominantly carried out by the EDGE of the bar as under Parason…..the Refining People

Primary Refining Effects: : 

6 Primary Refining Effects: Removes Primary Wall. Internal Fibrillation and Cell Wall de-lamination. External Fibrillation. Fibre Cutting (Fibre Length reduction). Creation of fines. Parason…..the Refining People

Structure of fibre: : 

7 Structure of fibre: Parason…..the Refining People

External FibrillationFibril Angle: : 

8 External FibrillationFibril Angle: Parason…..the Refining People

Secondary Layer/Fibrils: : 

9 Secondary Layer/Fibrils: Parason…..the Refining People

Internal De-lamination: : 

10 Internal De-lamination: Forces applied on the fibre by the bars of Stator & Rotor in Refiner cause fibrils to move relative to each other, breaking bonds and thus causing fibre delamination. Fibre delamination contributes to other changes in the fibre such as swelling and increased flexibility. Parason…..the Refining People

How fibre bonding really works!: : 

11 How fibre bonding really works!: Parason…..the Refining People

Influence of beating on coarse & fine fibres: : 

12 Influence of beating on coarse & fine fibres: Parason…..the Refining People

Typical Fibre Dimensions: : 

13 Typical Fibre Dimensions: Parason…..the Refining People

Typical Fibre Dimensions: : 

14 Typical Fibre Dimensions: Parason…..the Refining People

Spruce Hand sheet: : 

15 Spruce Hand sheet: Parason…..the Refining People

Utilization of Fine Bar Plates:(Low Intensity Refining Plates) : 

16 Utilization of Fine Bar Plates:(Low Intensity Refining Plates) Parason…..the Refining People Raw Materials : a. Hardwood b. ONP, Magazines, Note Book, Records, MOW etc., (Only white grade papers) 2. Paper Grade: Newsprint, Writing & Printing, Tissue, Posters, Colour Papers & Duplex Board for top layer (white).

Recycled fibres: : 

17 Recycled fibres: Recycled paper is a valuable source of fibre for the paper and board industry. Recycled fibre has already been Refined and dried once or more. Recycled fiber must be refined gently to avoid excessive Fines generation and Fibre damage. Parason…..the Refining People

Recycled Fibers: : 

18 Recycled Fibers: It is Desirable to : Regenerate the Swelling and Bonding Ability of Fibers. It is not Desirable to: Shorten the Fibers Weaken the Fibers Increase the De- watering Resistance. Reduce the Bulk. If not refined in a correct way the result can be disastrous. Parason…..the Refining People

Refined with Low Intensity Plate: : 

19 Refined with Low Intensity Plate: Parason…..the Refining People

Low Intensity Refining: : 

20 Low Intensity Refining: At the present scenario in paper industries, usage of Recycled (white base) & Hardwood fibre are increased, so paper industries are compelled to go for “low intensity refining”. Hardwood & Recycled fiber (White base) have shorter and thinner fibers than softwood pulps, and resistance against refining load is much lower. The gentle refining action increases the specific surface area of the fibers by fibrillating their outer surface, leading to greater strength development. Parason…..the Refining People

Slide 21: 

21 Parason…..the Refining People

Low Intensity Refining : : 

22 Low Intensity Refining : The technological results and cost of refining depend on the refining intensity, in other wards “Specific Edge Load” (SEL) While refining under low intensity, there are two possibilities: (a) Reduce refining power. (b) Increase cutting edge length (CEL). Parason…..the Refining People

Low Intensity Refining: : 

23 Low Intensity Refining: Parason…..the Refining People Large number of bar edges crossing points, there are more chances of retaining short fiber material on the bar edges, treating it in the refining zone.  Thicker fiber mat between the plates (more fiber-to-fiber interaction) increase the treatment of number of fibers.   “Low” intensity causes more internal fibrillation &“High” intensity causes external fibrillation.

Slide 24: 

SPECIFIC EDGE LOAD (Intensity of Refining) Parason…..the Refining People SEL is the Energy applied to Fibers from the Rotor Edge to the Stator Edge

Slide 25: 

Pt(kW) - Po(kW) SEL(Ws/m) = CEL(Km) x n(r/s) Pt : Total Power (Kw) Po : No Load Power (Kw) n : Rotating speed (rps) CEL : Cutting Edge Length (Km/rev) = Zr x Zst x L Zr : no. of rotor bars Zst : no. of stator bar L : Average length of one bar Parason…..the Refining People

Low Intensity Refining: : 

26 Low Intensity Refining: Parason…..the Refining People Each impact on the fibers makes more gentle, so the applied power is distributed over more bar edges.  The gentle refining action increases the specific surface area of the fibers by fibrillating their outer surface, leading to greater strength development.  In hardwood chemical pulps, faster change in drainage (freeness, SR) for a given amount of applied energy.

Low Intensity Refining: : 

27 Low Intensity Refining: Parason…..the Refining People Length of fibre is preserved, and fiber damage is minimized which makes less amount of bulk loss while refining. Better fiber mat formation in the refining zone, Wider gap between the rotor and stator refiner plates, less plate-to-plate contact which leads to reduction in applied power. This helps to reduce the size of “Disc diameter”

Example: Parason Tri Disc RefinerModel-TDR-24”,Connected Power-300 kW ; No Load Power- 100kW; RPM – 720 : 

Example: Parason Tri Disc RefinerModel-TDR-24”,Connected Power-300 kW ; No Load Power- 100kW; RPM – 720 Parason…..the Refining People

Slide 29: 

29 0 1.0 2.0 3.0 0.0 2.0 6.0 8.0 4.0 10.0 REFINING INTENSITY (Ws/m) SPECIFIC ENERGY – kWh/ oSR/MT CEL – 227.2 km/sec) (2.8x3.3) REFINING INTENSITY(SEL) Vs ENERGY 4.0 CEL – 82.4 km/sec) (5x5) Parason…..the Refining People (PARASON - TDR-24” Refiner ) (Ref. IPPTA Journal, Volume 20, Number-1, Jan-Mar. 2008)

Slide 30: 

30 0 2.0 4.0 6.0 0.0 2.0 6.0 8.0 4.0 10.0 FREENESS (Degree SR) SPECIFIC ENERGY – kWh/ OSR/MT FINE BAR (227.2 km/sec) CONVENTIONAL (82.4km/sec) FREENESS Vs NET ENERGY 8.0 Parason…..the Refining People 10.0 (PARASON - TDR-24” Refiner ) (Ref. IPPTA Journal, Volume 20, Number-1, Jan-Mar. 2008)

Low Intensity Refiner Plates: : 

31 Low Intensity Refiner Plates: Parason…..the Refining People

TYPE OF FIBER S.E.L : 

32 TYPE OF FIBER S.E.L SOFTWOOD - 1.5 – 6.0 Ws/m HARDWOOD - 0.2 – 0.8 Ws/m RECYCLED FIBER (White) - 0.4 – 2.0 Ws/m RECYCLED FIBER (Kraft) – 2.0 – 4.0 Ws/m POST REFINING OF MECHANICAL PULP - 0.7 – 1.5 Ws/m REJECT REFINING IN CHEMICAL PULP MILL – 0.5 – 2.0 Ws/m Parason…..the Refining People

PULP GRADE SPECIFIC ENERGY : 

33 PULP GRADE SPECIFIC ENERGY SOFTWOOD - 60 – 250kWh/t HARDWOOD - 20 – 80kWh/t RECYCLED FIBER - 20 – 100kWh/t POST REFINING OF MECHANICAL PULP - 30 – 80kWh/t REJECT REFINING IN CHEMICAL PULP MILL – 50 – 100kWh/t Parason…..the Refining People

Benefits of Low Intensity Refining : : 

34 Benefits of Low Intensity Refining : Improved Tensile strength and Porosity at a given Bulk & drainage. Increase Bulk with same smoothness & drainage. Improve Pick resistance of Harwood vessel segments. Reduce energy requirements to achieve targeted specifications. Greater Shive reduction at a given drainage in mechanical pulp. Parason…..the Refining People

Low Intensity Refining Benefits: : 

35 Low Intensity Refining Benefits: 18 – 30% higher tear, 10% higher Tensile and twice the long fiber content. 23 – 27% energy savings. Produces the highest degree of fibrillation and therefore a better bonding pulp. Parason…..the Refining People

Case Study: (Ref. IPPTA Journal, Volume 20, Number-1, Jan-Mar. 2008)Ballarpur Industries Ltd., Yamuna Nagar (Haryana) : 

36 Case Study: (Ref. IPPTA Journal, Volume 20, Number-1, Jan-Mar. 2008)Ballarpur Industries Ltd., Yamuna Nagar (Haryana) Parason…..the Refining People

Case Study: Ballarpur Industries Ltd., Yamuna Nagar. Comparative Refining Performance: : 

37 Case Study: Ballarpur Industries Ltd., Yamuna Nagar. Comparative Refining Performance: Parason…..the Refining People

Slide 38: 

38 PARASON’S R & D ALWAYS TRYS TO INDUCT NEW DEVELOPED ITEMS KEEPING IN MIND TO GIVE EFFICIENT & FRUITFUL SUPPORT TO THEIR VALUABLE CLIENTS OF PULP & PAPER INDUSTRIES. THE UNTAINTED SUPPORT FROM THE CLIENTS INDUCED PARASON TO DEVELOP NEW “FINE & SUPER FINE BAR PATTERNS HAVING 2.0 & 1.5mm BAR WIDTH. THIS NEW DEVELOPED PATTERN GIVES MORE BAR LENGTH, ULTIMATELY LESS SPECIFIC EDGE LOAD. THIS, IN TURN WILL HELP OUR VALUED CLIENTS BY WAY OF CONSIDERABLE POWER SAVING. Parason…..the Refining People

Parason New Fine Bar Patterns: : 

39 Parason New Fine Bar Patterns: Parason…..the Refining People

Parason New Super Fine Bar Patterns: : 

40 Parason New Super Fine Bar Patterns: Parason…..the Refining People

Slide 41: 

41 Parason…..the Refining People PARASON can develop the Refiner Plate with SEL in the range of 0.5 to 1.0 Ws/m for which we expect full support from our valued clients of Pulp & Paper Industry. Technical feedback & co-operation solicited to gain the results by using Low Intensity Refiner Plates.

Summary: : 

42 Summary: Fiber refining plays a vital role in paper making process. Better understanding and applying in a proper way & correct knowledge, better runnability of paper machine and high quality paper at reasonable cost can be achieved. Parason…..the Refining People

Conclusion: : 

43 Conclusion: Refiner operation with Hardwood & Secondary Fibre (white grade) should be at low specific edge loads below 1.0 Ws/m (low intensity refining). Plates should have high cutting edge length, the final result is optimum strength and optical properties, higher refiner efficiency and low specific refining energies. Parason…..the Refining People

Slide 44: 

44 THANK YOU FOR YOUR ATTENTION! Parason…..the Refining People REFINING…. OUR RESOURCES

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