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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