Mô phỏng công nghệ hóa học và dầu khí - Sour gas sweetening with dea

Nhóm Mô phỏng Công nghệ Hoá học và Dầu khí Trường Đại học Bách khoa Hà Nội Sour Gas Sweetening with DEA Gas 8 Sweetening Hấp thụ vật lý • H2O Hấp thụ hoá học: • MEA • DEA Hấp phụ hóa học • ZnO 2 PFD 3 Bài toán • Cấu tử: N2; H2S; CO2; C1; C2; C3; i-C4; n-C4; i-C5; n-C5; C6; H2O; và DEAmine • FP: Amines 4 Amine Wt% MEA 15 ÷ 20 DEA 25 ÷ 35 TEA, MDEA 35 ÷ 50 DGA 45 ÷ 65 Dòng Sour Gas Name Sour Gas Temperature 25oC Pressure 6900 kPa Molar Flow 1250 kgmole/h 5 Dòng Sour Gas Component Mole Frac. Component Mole Frac. N2 0.0016 i-C4 0.0026 H2S 0.0172 n-C4 0.0029 CO2 0.0413 i-C5 0.0014 C1 0.8692 n-C5 0.0012 C2 0.0393 C6 0.0018 C3 0.0093 H2O 0.0122 6 Dòng dung môi DEA Name DEA to Contactor Temperature 35oC Pressure 6850 kPa (995 psia) LiqVol Flow 43 m3/h (190 USGPM) Component Mass Fraction H2O 0.72 DEA 0.28 7 Add a Separator Name FWKO TK Feed Sour Gas Vapour Outlet Gas to Contactor Liquid Outlet FWKO 8 Flowrate of water in FWKO = ...........? Flowrate of water in FWKO = 260.56 kg/h 9 Add Absorber Column Name DEA Contactor Num of Stages 20 Top Stage Inlet DEA to Contactor Bottom Stage Inlet Gas to Conactor Ovhd Vapour Outlet Sweet Gas Bottoms Liquid Outlet Rich DEA Pressure Top 6850 kPa (995 psia) Pressure Bottom 6900 kPa (1000 psia) Top Temperature 40oC Estimate Bottom Temperature 70oC Estimate Ovhd Vap Rate 1245 kgmole/h 10 Absorber Column DEA Contactor 11 Absorber Column DEA Contactor Khai báo các kích thước chính của tháp: Bấm phím Object Navigator (hoặc F3) → chọn DEA Contactor → TS-1 12 Absorber Column DEA Contactor Khai báo các kích thước chính của tháp: 13 Absorber Column DEA Contactor Tray Dimensions Tray Space [m] 0.500 Tray Volume [m3] 0.5655 Diameter 1.200 Internal Type Sieve Weir Hight [mm] 25.00 Weir Length [m] 1.000 DC Volumn [m3] 2.827e-002 Active Area Flow Path 1 Weeping Factor 1.000 14 Absorber Column DEA Contactor Run Column Parameter tab → Efficiencies page → Select Component Tính:  Nồng độ H2S trong khí ngọt?  Nồng độ CO2 trong khí ngọt? 15 Absorber Column DEA Contactor 16 Add a Valve Name VLV-100 Connections tab Inlet Rich DEA Outlet DEA to Flash TK Worksheet tab Pressure of DEA to Flash TK 620 kPa 17 Add a Valve 18 Add a Valve 19 Add a Separation Flash TK Name Flash TK Connections tab Inlet DEA to Flash TK Vapour Outlet Flash Vap Liquid Outlet Rich to L/R 20 Add Heat Exchanger Connections tab Name L/R HEX Tube Side Inlet Rich to L/R Tube Side Outlet Regen Feed Shell Side Inlet Regen Bttms Shell Side Outlet Lean from L/R Parameters tab Tube Side Delta P 70 kPa (10 psi) Shell Side Delta P 70 kPa (10 psi) Tube Outlet Temperature 90oC 21 Add Distillation Column Name Regenerator Num of Stages 18 Condenser Type Full Reflux Feed Streams / Stage Regen Feed / 4 Ovhd Vapour Acid Gas Bottoms Liquid Regen Bttms Condenser Enegy Cond Q Reboiler Enegy Reb Q 22 Add Distillation Column Name Regenerator Fixed Damping Factor 0.4 Condenser Pressure 190 kPa (27.5 psi) Condenser Delta P 15 kPa (2.5 psi) Reboiler Pressure 220 kPa (31.5 psi) Efficiencies CO2 0.15 H2S 0.8 23 Damping Factor 0.4 will provide a faster, more stable convergence Fixed Damping Factor 24 Efficiencies 25 Distillation Column 26 Add Specs Ovhd Vap Rate Specs Overhead Vapour Rate Spec Value 75 kgmole/h Status estimate 27 Add Specs Ovhd Vap Rate 28 Add Specs - Reflux Ratio Specs Reflux Ratio Spec Value 1.5 Status Estimate 29 Add Specs - Tray Temperature Specs Tray Temperature Tray 1 Spec Value 100oC Status Estimate 30 Add Specs - Tray Temperature Specs Tray Temperature Stage Reboiler Spec Value 125oC Status Estimate 31 Add Specs - Tray Temperature Specs Tray Temperature Stage Condenser Spec Value 50oC Status Active 32 Add Specs - Reboiler Duty Specs Reboiler Duty Stage Reboiler Spec Value 1.3e7 kJ/h Status Active 33 Add Specs cho tháp 34 Add New Stream H2O Bổ sung H2O mất mát 35 Name Makeup H2O Temp 20oC Conpenent Mole Fraction H2O 1 Add Mixer MIX-100 Connections Inlets Makeup H2O Lean from L/R Outlet DEA to Cool Parameters Pressure Assignment Equalizer All Worksheet Liq.Vol.Flow of DEA to Cool 43 m3/h 36 Flow Rate of Makeup H2O = .......? Add Cooler 37 Connections Name Cooler Feed Stream DEA to Cool Product Stream DEA to Pump Energy Stream Cooler Q Parameter Pressure Drop 35 kPa Add Pump P-100 38 Connections Inlets DEA to Pump Outlet DEA to Rec Energy Pump Q Worksheet Temperature of DEA to Rec 35oC Pressure of DEA to Rec....... ? Add Logical Operation SET-1 39 Target Variable Object DEA to Rec Variable Pressure Source Object Gas to Contactor Parameter Multiplier 1 Offset [kPa] - 35 kPa Add Recycle 40 Connections Inlet DEA to Rec Outlet DEA to Contactor Parameter  Tolerance Vapour Fraction 10.000 Temperature 10.000 Pressure 10.000 Flow 0.100 Enthalpy 10.000 Composition 0.100 PFD 41