Amine Sweetening Unit Simplified Design Equations

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chemical reaction process


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Simplied Design Calculations for Natural Gas Amine Sw

Amine Circulation Rate

onoethanolamine !"A#

Diethanolamine !D"A# !conventional# !$%& mol acid gas pic'(up per mole

Diethanolamine !D"A# !high loading# !$%) mol acid gas pic'(up per mole

Activated ethyldiethanolamine !D"A# !assuming *+, ratio of D"A to

!$%& mol acid gas pic'(up per mole mi-ture assumed#

where:

y = Acid gas concentration in sour gas, mole%

x = Amine concentration in liquid solution, mass% (Refer Figu

Note

The amine circulation rate equations normally provide conservative (high) estima

circulation rate. They should not be used if the combined H2S plus CO2 concentra

is above mole!. They are also limited to a ma"imum amine concentration of ab

"stimated .eat "-change Re/uirements

ain Reference+ G0SA "ngineering Databoo'1 ,2th"dition1 S3 Units

Diglycolamine !DGA4# !$%2* mol acid gas pic'(up per mole DGA assume

$&'

= our 'as to "e rocessed, ))m*+day

x

yQQ SOGMEA = 327

x

yQQ SOGDEA = 361

x

yQQ SOGDEA = 256

x

yQQ SOGDGA = 448

x

yQQ SOGAcMDEA = 415


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"stimated 0ower Re/uirements


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Diameter of Amine Contactor

where:

contactor diameter, mm (round u to nearest 1- mm#

. = .ressure at to of contactor, /.a (a"s#

Diameter of Regenerator below feed point

where:

Regenerator "ottom diameter, mm

Diameter of Regenerator above feed point

where:

Regenerator diameter a"o0e feed oint, mm

c=

$&'

= our 'as to "e rocessed, ))m*+day

r=

$amine= Amine irculation Rate, m*

+h

ra=

P

QD SOGc = 10800

ear QD

min160=

rra DD = 67.0


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"-ample Calculation

3nputs

1

32 = -45 mole%

&2 = 246 mole%

Amine = 7A (con0#x = 2- mass%

. = 65- /.ag

5utputs

514!

Re"oiler 3 = 8-84! /9

Re"oiler A = 26!

*/9

262

Amine A37 3 = 116! /9

Amine A37 A = 28

Re;ux ondenser 3 = 2*5/9

Re;ux ondenser A = 1*1

)ain Amine .ums 111/9

Amine ciencies are low of the order of 12-%

*4 2- actual 0al0e trays are a standard design!4 A demister mist eliminator is ro0ided a"o0e the to tray to minimi?e amine lo

4 yical tray sacing is !8mm to 51-mm

54 acing "etween the to tray and the demister mist eliminator a"o0e the to t

84 .erformance monitoring of an amine contactor is normally done "y ro0iding a

the contactor gas inlet and the gas outlet

64 Aroximate ost data for amine contactor is ro0ided "elow:

Contactor Si6e

$&'

= ))m*+day

$amine

= m*+h

m2

Rich@ean Amine7xchanger 3 =

Rich@ean Amine7xchanger A =

m2

m2

m2

c=

r=

ra=

Cost71 ,$$$8


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1-2--

22*--

*8--

!6-5-

ost data is aroximate and deends on many factors such as selected materia

duties and taxes, fa"rication code followed, insection and testing costs, code sta

.reared "y: An/ur ri0asta0a

hemical 7ngineer

7mail:

-45m C .ac/ing

-4m C 2- rays

141m C 2- rays

14!m C 2- rays

an/urD2-51Ehotmail4com
mailto:[email protected]:[email protected]


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etening Units

D"A assumed#

"A assumed#

D"A#

e 21! "elow#

es of required

tion in the feed gas

out #$! by mass.

#


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)7A

7A (con0#

7A (3@#

'AAc)7A

gineering Databoo'#

ses

ay is tyically --mm to 12--mm

. measurement "etween


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l and itBs cost, la"or cost,

ming requirements


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Amine Sweetening Unit Simplified Design Equations

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