Dec 2010 Spiral Bar

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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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LOW CONSISTENCY REFINING WITH CURVED BAR REFINER PLATES PARASON MACHINERY INDIA PVT. LTD., AURANGABAD, INDIA. Mr. Shekhar Desarda

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Galaxy

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SHELLS

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Cauliflower

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What is (Curve) SPIRAL ? Bernoulli Spiral Equiangular Spiral Logarithmical Spiral

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Bernoulli Spiral

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Equiangular Spiral

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Logarithmic Spiral

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CURVED BARS are inspired from SPIRALS

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PARALLEL BAR - STATOR

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PARALLEL BAR - ROTOR

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CURVED BAR -STATOR CURVED BAR -ROTOR

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PARALLEL BAR CURVED BAR Crossing Angles are not Constant throughout the refining zone Crossing Angles are constant throughout the refining zone No open area management Good open area management More Power Consumption Less Power Consumption Less Homogeneous Refining Action More Homogeneous Refining Action

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PARALLEL BAR CURVED BAR Less Number of Fiber Treatments. More Number of Fiber Treatments Less Homogeneity More Homogeneity Less Throughput More Throughput No Optimum Bar & Groove Width Optimum Bar & Groove Width No Anti-plugging Design Anti-plugging Design

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CEL- 16.5 Km/rev CEL- 14.2 Km/rev Bar Pattern-2.8 X 3.2

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Summary Constant crossing bar angles High CEL (Km/Rev) Low SEL (Ws/m) High Throughput (T/hr) Low Specific Energy (Kw/°SR/T) High Fabrilliation Gentle Refining Minimum Fibre Shortening Less Cutting

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Conclusion: Optimum Fiber Development

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Curved Bar Refining Plates are NEW GENERATION Refining Plates

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