Gas Processing Simulation

Instructor: Dr. Istadi (http://tekim.undip.ac.id/staf/istadi )
Email: istadi@undip.ac.id

Software Simulasi
• HYSYS
• CHEMCAD
• ASPEN PLUS

Schematic of typical glycol
dehydration unit

Kondisi Gas Masuk
• Tekanan gas inlet: 200 psia
• Suhu gas masuk: 82 oF
• Kandungan air gas masuk (kondisi jenuh): 151 lb/MMSCF
• Kapasitas gas masuk pada kondisi design per unit adalah: 60 MMSCFD
Komponen Gas Fraksi mol MMSCFD
N 2 0,0044 0,264
CO 2 0,0012 0,072
CH 4 0,988 59,28
C 2 H 6 0,0044 0,264
C 3 H 8 0,0008 0,048
i-C 4 H 10 0,0003 0,018
n-C 4 H 10 0,0005 0,03
n-C 5 H 12 0,0002 0,012
i-C 5 H 12 0,0002 0,012
Jumlah 1 60

SALES G AS
12
DRIED G AS
5
STRIPPING GAS
SALES G AS 60 MMSCFD (8.1 L B/MMSCF )
P= 198 psia, T= 89 oF
28
15
8.1 lb/MMSCF )
22
5
13
TO ATMOSPHERE
G AS-GL YCO L HE
E-910
20
20
EXCHANGER STRIPPER (op tional)
22
42
27
ST ILL COLUMN (packed)
E-730
11
LEAN GL YCO L
12
35
21
G LYCO L REBOILER
E-770
by pass (igno re) 27
18
19
CO NTACTO R
V-690
RICH G LYCO L
33
34
36
37
10
9
1
IN FLASH T AN
24
3
14
FL ASH TANK
V-710
21
TO F LARE
16
TEG IN REGEN
TO BLO W CASE
7
To Reb oiler F uel
19 31
6
16
ST RIPPER
32
30
15
CO NCENTRATED
23
MAKE UP TEG
INLET G AS
60 MMSCFD (151 lb/MMSCF)
P= 200 psia, T= 82 oF
17
17
39
38
SEPARATOR
11
14
26 29
13
25
SCRUBBER
W ATER & SOL ID
23
24
7
G LYCO L CIRCULATING PUMP
P-740
10
G LYCO L PLATE HE
E-760
TEG RECIRC. 2
6
1
8
41
40
18
4
4
3
26
G LYCO L BO OSTER PUMP
P-790
9
2
TEG RECIRCULAT IO N
18 gpm
G LYCO L SURGE TANK
EQ UIPPED W ITH CO IL HE
V-780

Summary Hasil Simulasi
Gas Inlet Properties
DHP Properties
Suhu
Inlet
Gas
Tekanan
Inlet
Gas
Tekanan
Gas Out
Kompres
or
Laju Alir
Inlet Gas
Kadar Air
Inlet Gas
Efisiensi
Kontakt
or
overall
Jumlah
Tray
Kontakt
or
Laju
Alir
Glycol
Water
Remova
l Load
Reboiler
Duty
Kadar Air
Outlet
Gas
( o F) (psia) (psia)
(MMSCF
D)
(lb/MMSC
F)
(%) (gpm) lb H 2 O/h
MMBtu/
h
(lb/MMSC
F)
82 200 - 60 151 39 8 18 357,3 0,5269 8,1
104 583,7 - 60 151 15 9 18 363,2 0,7825 5,74
88,2 156 - 45 162,4 13,9 8 7 187,3 0,2438 64,2
88,2 156 - 45 162,4 30 8 18 269,6 0,3911 20,4
88,2 156 - 52 162,4 65 8 18 335,7 0,4796 7,06
88,2 156 300 45 130 43 8 18 233,3 0,3508 6,5
88,2 156 - 45 162,4 30 8 18 269,6 0,3911 20,4
88,2 156 - 45 162,4 30 12 18 286,9 0,4112 11,2
88,2 80 - 45 162,4 30 8 18 258,6 0,3833 26,3
88,2 80 - 52 162,4 30 8 18 294,0 0,4684 28,5
88,2 80 - 52 162,4 30 8 20 296,4 0,4802 27,4
88,2 80 - 52 162,4 30 8 35 303,6 0,5624 24,1
88,2 80 - 52 420 30 8 46 788,7 1,2056 56
88,2 80 - 52 420 30 12 49 839,2 1,2714 32,7