大四化工设计课ppt

1、Steam Generator and Gum SeparationProject Name: Production of Drying Oil and Acetic Acid from Castor OilCompany Name: Team 32Presented by: Qian Yixi (U094350J)Team 32 - Strive for Engineering Excellence 1Objectives/RequirementsRecover heat from the process streams Remove gum solid from the process s

2、treamProvide proper feed stream condition in to ACO separatorDesign a pump for ACO recycle stream2Options1. How to recover the heatSteam generator (for reboilers-LPS, MPS, HPS)Preheater (ACO reactor and AA-AAN separator)2. Order of the equipmentSteam generator Preheaters Gum Separator Pressure regul

3、ating device3Recommended process 4Steam Generator - TypeAccording to Serth (2007), “a dirty or corrosive heating medium together with a moderately fouling process stream favours a horizontal thermosyphon reboiler.”5Heat transfer coefficient6Equipment SpecificationsPERFORMANCE OF ONE UNITSize: 0.3874

4、/1.5m (0.3302/6.1) Type: CEU Hor Heat transfer Area: 26.1 m2 (25.6) No of shells: 1Fluid allocationShell SideTube SideFluid nameBFWFluidFluid quantity, Totalkg/h777 (991)8186Vapor (In/Out)kg/s00.216 (0.28)00Liquidkg/s0.216 (0.28)02.2742.274Temperature (In/Out)C115.2195(196)288.9210Pressure (abs)kPa1

5、500 (1435)1399(1432)12201190 (1996)Pressure drop, allow./calc.kPa300.221(3.1)356539.75(23.7)Fouling resist. (min)m2*K/W0.000120.000530.00063Ao basedHeat exchanged498 kW (540)MTD corrected52.48 C (43)Transfer rate, Service250 W/(m2*K) (494)CONSTRUCTION OF ONE SHELLNumber passes per shell1 (shell side

6、)6 (Tube side)Tube typePlainMaterialSS 316ShellCarbon SteelShell ID387.4 mm(337)Tube pattern 90No of tubes54(26)Tube Length6.1 m(6.1)Tube OD25.4mmBaffle-crossingCarbon SteelType Single SegmentalCut(%d)35(39)Pitch0.0318 m7Gum Separator-Solid-liquid separation From Tarleton (2007), following types of

7、separation unit can be used for this process: Settling tank or lagoon thickener, Clarifiers, Sedimenting centrifuges, Lamella separator, Hydrocyclones, Disc stack, Scroll decanter, Rotary (vacuum) drum, etc. Only Gravity thickeners /clarifiers and Strainer Strainer is not able to recover solid. The

8、obvious advantage of gravity settling is its low cost Wakeman (2005). 8Preliminary DesignResidence Time =947s A = 27.4 m2Assume ideal settling involving the following elements:Discrete and unhindered settling is assumedEven distribution of flow entering the basinParticles that enter the sludge zone stay in the sludge.9Pressure Regulating Device10Valve Design11Cost Estimation12Equipment Specifications13AlternativesFilter instead of sedimentation tank Recover more l