Download SGBAU B-Tech 6th Sem FPOPC Petro Pulp n Paper Technology III Question Paper

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Pulp & Paper Technology - II

Pages: 4

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Time : Three Hours

Max. Marks : 80

Notes:

1. Due credit will be given to neatness and adequate dimensions.
2. Assume suitable data wherever necessary.

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3. Diagrams and chemical equations should be given wherever necessary.
4. Illustrate your answer necessary with the help of neat sketches.
5. Use of slide rule logarithmic table, Steam table, Mollier's Chart, Drawing instrument, Thermodynamic table for moist air, Psychrometric Charts and Refrigeration charts is permitted.
6. Discuss the reaction, mechanism wherever necessary.
7. Dubhring rule chart, enthalpy concentration chart is permitted.

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SECTION - A

1. a) A horizontal belt pulp washer is processing 600.0 tonnes per day of (oven dry basis) pulp. The length of workable surface of the belt washer is 10.0 m and width is 8.0 m. Calculate the washer loading. (4)
2. b) When fertilizer is used in high quality chemical pulps what problems does paper maker face? (4)
3. c) Figure 1 shown below explains the efficiency of hydro-cyclones versus reject rate by volume. It is given that ΔP₁ =50kPa, ΔP₂ =150kPa and ΔP₃ =300kPa. Justify why efficiency falls at ΔP₂ and ΔP₃ pressure difference? (3)
   

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