Contoh Desain Ko Drum [PDF]

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Rancang separator vertikal untuk memisahkan cairan (Q = 25000 kg/jam, ρ = 650 kg/m ) dan uapnya (Q = 15000 kg/jam, r = 3.5 kg/m3). Konfigurasi vessel separator tidak memiliki ”demister pad” dan tidak ada alat masukan (”no inlet device”). Gambar hasil rancangan lengkap dengan dimensinya (D, BTL, LLL, HLL, TTL), termasuk diameter nosel umpan (d1), diameter nosel keluaran uap (d2) dan diameter nosel keluaran cairan (d3). Gunakan harga K = 0.15 fps dan waktu hold-up cairan = 10 menit. 3



Jawab Flow Density Volume



kg/hr kg/m3 m3/hr



Design of a vertical vapor/liquid separator Liquid Vapor 25000 15000 650 3.5 38.46 =D8/D9 4285.71 =F8/F9



Selected vessel configuration



Vessel Diameter Selected K values Max. vapor velocity Min. cross sectional area Min. diameter



No demister No inlet device



fps m/s m/s m2 m



0.15 0.0457 0.621 1.92 1.56



=E16/3.2808 =E17*((C9-E9)/E9)^0.5 =E10/3600/E18 =(4*E10/3600/3.14/E18)^0.5 Use



Vessel Height Step 1: Set the low liquid level LLL 0.2 m Step 2: Set the height for liquid hold-up Required liquid hold-up 10 min 6.41 m3 LLL->HLL 3.35 m



Use



0.2 m



=D27/60*C10 =D28/(3.14*E20^2/4) Use



3.35 m



Use



0.47 m



No inlet device =(C11+E11)/(C13+E13) =F39/F40 =F41^0.5 =C13+E13 =F43/3600 =F44/F42 =(4*F45/3.14)^0.5 Use



0.384 m



Step 3: Set clearance HLL to inlet nozzle 1. Min. distance 0.3 m 2. 0.3 x diam 0.47 m Step 4: Inlet nozzle Sizing basis inlet nozzle rho v^2 rho mix v^2 v Total volume A min nozzle D min



1000 9.25 108.104 10.40 4324.18 1.20 0.116 0.384



m3/hr m/s m3/hr m3/s m2 m



Step 5: Inlet nozzle to Top LL 1. Min. distance 2. 0.7 x diam.



0.9 m 1.09 m



=0.7*E23



Total TL to TL distance Vessel diameter



5.49 m 1.56 m



=I27+I32+I36+I46+I50 =I24



Nozzle Size Feed nozzle Vapor outlet nozzle Sizing basis rho v^2 rho vapor v^2 v Total volume A min nozzle D min Liquid outlet nozzle Sizing basis vmax Total volume A min nozzle D min



1.56 m



No demister



0.384 m



Use



1.09 m



=I46



Use



15.10 in



Use



8.474 in



Use



4.593 in



3750 3.5 1071.43 32.73 4285.71 1.19 0.036 0.215



m/s m3/hr m3/s m2 m



=E12 =D58/D59 =D60^0.5 =E13 =D62/3600 =D63/D61 =(4*D64/3.14)^0.5



1 38.46 0.01 0.011 0.117



m/s m3/hr m3/s m2 m



=C13 =D68/3600 =D69/D67 =(4*D70/3.14)^0.5



kg/m3