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2003 Course Bio-Process Equipment Design

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Total No. of Questions : 12] P1386 [Total No. of Pages : 7 [3764]-453 Final Year B.Tech. (Biotech.) 416283 : BIO-PROCESS EQUIPMENT DESIGN (2003 Course) (Sem. - I) 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) Explain the construction and working of centrifuge discharge filter.[10] b) A chromatographic separation of two component samples on a 40 cm column gave the retention times for two solutes as 8.5 and 10 min. respectively. Calculate the following : i) No. of theoretical plates. ii) Plate height. iii) Resolution of peaks. The base width of two chromatographic peaks are 0.6 and 0.8 min.[8] OR Q2) a) State the principle of partition chromatography with suitable example. [6] b) Write short note on : i) Rotary disc filter. ii) [12] Leaf filter. P.T.O. Q3) a) Explain the criteria for the selection of vessels operating at low temperatures. [6] b) State normal conditions and transient conditions for operation of pressure vessels. [10] OR Q4) a) Explain different types of pipe joints with neat sketches. [6] b) Describe downstream processing operations used in fermentation process. [10] Q5) a) Explain the methods of attachment of formed heads to the shell. b) Design pressure vessel from following data : Shell Inner dia 1000 mm Material-Stainless steel Internal pressure 1.5 N/mm2 Permissible stress 180 N/mm2 Head Type Flanged and Shallow dished Outer dia 1000 mm Crown radius 1000 mm Knuckle radius 79 mm Nozzle Welded to shell Max. permissible stress 128 N/mm2 Inner dia 189 mm Thickness 3.0 mm Bolts-Material-Mild Steel OR [3764]-453 -2- [6] [10] Q6) a) Explain autofrettage and shrinkfit construction of high pressure vessel. [6] b) Design high pressure vessel using maximum shear stress theory from following data : [10] Internal diameter of shell 20 cm Internal pressure 140 N/mm2 External pressure atmospheric Material High tensile steel Permissible tensile stress 478 N/mm2 Modulus of Elasticity 2*105 N/mm2 SECTION - II Q7) a) Describe with neat sketch design of Spiral heat exchanger. b) Design shell and tube heat exchanger from following data : [6] [12] Shell side No. of passes - 1 Material - Carbon steel Corrosion allowance - 3 mm Fluid - Water Inlet temp. 30 C; Outlet temp. 65 C Working pressure - 0.48 N/mm2 Design pressure - 0.7 N/mm2 Nozzles - Inlet & Outlet 110 mm Tube side Material - Stainless steel No. of tubes - 40 Pitch - square 22 mm Outer dia - 55 mm Length - 1300 mm [3764]-453 -3- Fluid - Nitrous oxide Inlet temp. 98 C; Outlet temp. 70 C Permissible stress - 480 N/mm2 Nozzles Vent & Drain - 30 mm Material - Carbon steel Permissible stress - 280 N/mm2 Shell cover Dished head Crown radius 678 mm Knuckle radius 72 mm Channel & Channel cover Material - Carbon Steel Permissible stress - 98.2 N/mm2 OR Q8) a) Explain the construction of basket type short tube vertical evaporator.[6] b) Design the vertical short tube evaporator from following data : Evaporator drum External pressure - 0.15 N/mm2 Heating surface required - 280 mm2 Steam pressure - 0.25 N/mm2 Density of liquid - 8500 N/m3 Density of vapour - 0.90 N/m3 Material - Evaporator-Carbon steel Tubes-Brass Permissible stress - 98 N/mm2 Modulus of Elasticity - 19.8*104 N/mm2 Modulus of Elasticity - 8.87*104 N/mm2 [3764]-453 -4- [12] Q9) a) Design vessel shell with half coil jacket from following data : Vessel shell with inner dia - 1000 mm Jacket inner dia - 1200 mm Jacket length - 1500 mm Width of channel jacket - 80 mm Internal pressure (shell) - 0.60 N/mm2 Internal pressure (jacket) - 0.29 N/mm2 Allowable stress - 98 N/mm2 E at 20 C - 190*103 N/mm 2 - [10] 0.3 Poisson s ration Flanged and dished head Inner dia - 1000 mm Crown radius - 1000 mm Knuckle radius - 98 mm b) Explain various types of jackets with neat sketches. [6] OR Q10) a) Design shaft & blade of turbine agitator which is running in vessel of 1800 mm diameter using critical speed criteria. [10] Internal pressure of vessel - 0.35 N/mm2 Diameter of agitator - 200 mm Speed (max.) - 400 rpm Liquid in vessel Specific Gravity - 1.18, Viscosity - 450 cP Overhang of agitator shaft between bearing and agitator - 1000 mm Agitator blade nos - 6 Width of blade - 65 mm [3764]-453 -5- Thickness of blade - 8 mm Shaft Material - Rolled steel permissible stress - 55 N/mm2 Tensile stress - 310 N/mm2 E - 19.8 N/mm2 b) Explain shaft design based on critical speed. Q11) a) Explain the design of plate type column with downcomer. b) Design the fractionating column from following data : Shell Dia - 2000 mm Design pressure - 1.2 N/mm2 Working temp. - 135 C Design temp. - 160 C Material - Low carbon steel Permissible stress - 78.8 N/mm2 Head - Elliptical welded to shell Trays Sieve type No. - 40 Spacing - 0.5 m Holes - 2 mm Thickness - 1.8 mm Weight of attachment - 1000 N/mm2 Weight of liquid and tray - 1200 N/mm2 Weight of column - 1200 kgs Wind pressure - 1780 N/mm2 OR [3764]-453 -6- [6] [6] [10] Q12) a) Explain the design of liquid distributors and redistributors. [8] b) Explain the segmental downcomer, chord type downcomer, circular type downcomer with neat sketches. [8] rrrr [3764]-453 -7-

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