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A vaporiser is required to evaporate 10000 kgh of a process fluid at 6 bar Theliquid is fed to the vaporiser at 20ŽC The plant has a spare kettle reboiler available with the

A vaporiser is required to evaporate 10,000 kg/h of a process fluid, at 6 bar. Theliquid is fed to the vaporiser at 20ŽC.The plant has a spare kettle reboiler available with the following specification.U-tube bundle, 50 tubes, mean length 4.8 m, end to end.Carbon steel tubes, inside diameter 25 mm, outside diameter 30 mm, square pitch45 mm.Steam at 1.7 bara will be used for heating.Check if this reboiler would be suitable for the duty specified. Only check thethermal design. You may take it that the shell will handle the vapour rate.Take the physical properties of the process fluid as:liquid: density 535 kg/m3, specific heat 2.6 kJkg1ŽC1, thermal conductivity0.094 Wm1ŽC1, viscosity 0.12 mN m2s, surface tension 0.85 N/m, heat ofvaporisation 322 kJ/kg.Vapour density 14.4 kg/m3.Vapour pressure:temperatureŽC 50 60 70 80 90 100 110 120pressure bar 5.0 6.4 8.1 10.1 12.5 15.3 18.5 20.1

 

Jul 24 2020 View more View Less

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