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2003 Course Plant Engineering

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Total No. of Questions :12] P1168 [Total No. of Pages : 3 [3864] - 441 B.E. (Biotechnology) Final Year PLANT ENGINEERING (2003 Course) (Sem. - II) (419289) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Figures to the right indicate full marks. 2) Use of Programmable calculator is not allowed. 3) Draw a neat sketch wherever necessary. 4) Make necessary assumptions wherever required. 5) Answer any Three Questions from section I and any Three Questions from Section II. SECTION - I Q1) a) b) Explain the procedure for drawing process flow diagram. Discuss scale up factors for following equipments. i) [10] Nozzle discharge centrifuges. ii) [8] Packed columns. OR Q2) Draw neat labeled process flow diagram for the following process. Separation of n-butanol-water is carried out in two steps. The process starts by charging the original mixture to a decanter which operates at temperature below the boiling point. The butanol-rich phase from decanter is fed to a stripping column which produces high purity alcohol as bottom product and an overhead vapour which approaches the azeotropic composition. The aqueous phase is fed to the second stripper which produces butanol free water as bottom product. Since water is the product open stream can be used to provide reboil vapour. The aqueous column also produces a top vapour which approaches the azeotropic composition. Both overhead vapour streams are condensed in common condenser and then fed to the decanter alongwith fresh feed. [18] P.T.O.

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