the proces
TRANSCRIPT
LINIT T
he P
roce
ss
Key:-
Impure
Air
Purifie
d A
ir
Liq
uie
d A
ir G
aseous N
itrogen
Liq
uie
d N
itrogen
1.5
2 (i)
2 (ii)
3
5
6
AB
1. C
om
pressso
r2
.(i) p
urifier (O
peratin
g)
(ii) pu
rifier (Reg
enratin
g)
3. H
eat Ex
chan
ger
4. E
xp
and
er5
. Co
lum
n6
. Co
nd
enser
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ed B
y:S
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om
pa
ny
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alyst &
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wn B
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ate
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1/0
4/2
01
3
LIN
IT is b
ase
d o
n a
n o
pen cycle
pro
cess
in w
hich
air is th
e w
orkin
g flu
id a
nd a
lsoth
e fe
edsto
ck from
wh
ich th
e liq
uid
nitro
ge
n is d
erive
d.
Air is d
raw
n fro
m th
e a
tmo
sph
ere
an
d is co
mpre
ssed b
y the
CO
MP
RE
SS
OR
(1).
Moistu
re a
nd ca
rbon
d
ioxid
e n
orm
ally
pre
sen
t in
th
e air
are
re
mo
ved
in
th
eP
UR
IFIC
AT
ION
UN
IT (2
). Th
is un
it com
prise
s two a
dso
rptio
n co
lou
mn
s,one o
fw
hich
treats th
e a
ir wh
ile th
e o
the
r is be
ing
reg
en
era
ted.
The
co
mpre
ssed
a
ir,no
w
dry
an
d
free
from
im
pu
rity,en
ters
the
H
EA
T
EX
CH
AN
GE
R (3
) an
d d
ivide
s into
two stre
am
s.stream
A p
asse
s th
rou
gh
the
EX
PA
ND
ER
(4) w
he
re it lo
ses e
ne
rgy a
nd is co
ole
d. It retu
rns th
rou
gh
the
oth
er
pa
ss of th
e h
ea
t exch
an
ge
r to co
ol a
nd liq
uefy a
ir stream
B.
The
liquid
air,o
n le
avin
g th
e h
eat e
xche
nger,is e
xpa
nd
ed th
rou
gh
a va
lve in
to th
eC
OL
UM
N (5
) whe
re it is fra
ction
ate
d.N
itrog
en va
po
ur is p
urifie
d.T
his n
itrogen is
then
liqu
efie
d in
the C
ON
DE
NS
ER
(6),th
e re
frige
ratio
n fo
r this b
ein
g p
rovid
ed b
y
en
riche
d liq
uid
air ta
ken
from
the
colu
mn
base
.
This liq
uid
nitro
ge
n is th
en d
ispe
nse
d in
to a
suita
ble
vesse
l for u
se.
4
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ت نف������ص������نع
گاه ش������
پژوھ
Impure
Air
Liq
uie
d N
itrogen