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The Nature GasProcessing Plant

Prepared by

Shameel AbdullaAbdur Rahman Shazed

Abdullah Abdulmajeed

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Outline

Introduction Process descriptions and discussion of inputs an

I S!eetening

II"ehydration

IIING# separation.Recommendations

.$ % A

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Introduction

&eed gas composition and conditions 'e assume only () as (*+

The sale gas speci,cation

Feed gas specifcation

(Dry basis)component -H2S /CO2 0Nitrogen 1Methane )Ethane /Propane 2i!"tane 3n!"tane 3iPentane 1nPentane 3C#$ 1

S"%fde& Methy%Propy% 1

F%o' rate

(MMSCFD)

5

emperat"re () )Press"re (bar) 3

Feed gas specifcation

(Dry basis)component -H2S /CO2 0Nitrogen 1Methane )Ethane /Propane 2i!"tane 3n!"tane 3iPentane 1nPentane 3C#$ 1

S"%fde& Methy%Propy% 1

F%o' rate

(MMSCFD)

5

)

Press"re (bar) 3

Specifcations a%"e

Hydrocarbon de'point

6/O

( ma7 at 21 bar

*ater de' point 601 O( ma7 at 21 bar+ross ca%orifc ,a%"e 3111 8T9:scf minHydrogen S"%fde

content

3/ ppm; ma7

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Objecti;es

To intergrade a single process to meet sales gasre

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O;er;ie!

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Process Do! diagram

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Absorber

No o/ trays

ray spacing

(/t)*eir height (Fraction

0oodingray diamete

(/t)Co%"mn heigh

(/t)

Absorber Number of stages 7

Stage numbering Top down

Flash type VLE

Process data Column type TSWEET kinetics

Flash type VLE

Column add on NoneStage data summary Pressure Change psi

!ottom head " psi

Stage data-hardware-general

#ardware Tray

Fract ion $ looding %" & $or a ll st ages

'eal to ideal stage ratio $or all stages

System $actor "() $or all stages

Stage data-tray Tray spacing * $t

Weir height * in

Stage data- specification-add

Type o$ speci$ication 'ich approach

'ich stage %

Lean $eed *"

Component #ydrogen sul$ide

Stage data- specification-

add

Type o$ speci$ication 'ich approach

'ich stage %

Lean $eed *"

Component Carbon di o+ide

Stage data- specification-add

Type o$ speci$ication Lean approach

Stage ,

E+iting phase Vapor

component #ydrogen sul$ide

Stage data- specification-add

Type o$ speci$ication Lean approach

Stage ,

E+iting phase Vapor

Component Carbon di o+ide

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StripperStripper Number of stages 10

Stage numbering Top -own

Flash type VLE

Process data Column type TSWEET .lternate stripper

Flash type VLEColumn add on Partial condenser with redboilerr

Stagedata-summary

Show stage Tick all stages

Pressure Stage/, ,0(1 psia

Stage/* *,(% psia

!ottom head " psi

Stagedata-specification

'e$lu+ ration ,/Target ,

!oilup ratio ,/Target "(,,0

Stagedata-specification-add

Type o$ speci$ication Phase property

Stage Condenser

Phase Total

Property Temperature

Target ,*"

status .cti2eStagedata-convergence

Enthalpy model Composition/-ependent

Stripper Number of stages 10

Stage numbering Top -ownFlash type VLE

Process data Column type TSWEET .lternate stripper

Flash type VLEColumn add on Partial condenser with redboilerr Stagedata-summary

Show stage Tick all stagesPressure Stage/, ,0(1 psia

Stage/* *,(% psia!ottom head " psi

Stagedata-specification

'e$lu+ ration ,/Target ,!oilup ratio ,/Target "(,,0

Stagedata-specification-add

Type o$ speci$ication Phase propertyStage Condenser Phase TotalProperty TemperatureTarget

status .cti2eStagedata-convergence

Enthalpy model Composition/-ependent

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Output of s!eeting unitProperties Sweet Gas

emperature!otal" 3,(,3 Pressure!otal" ,5()1*

Analysis Sweet 6as

#ater $ew Point!%ree&e 1'

otal")(51

$ew Point

emperature!(apor

Pressure 1' otal"

3*(%5

)omposition Sweet 6as

*+S!,ole %raction' otal" ,3("*)

)+!,ole %raction' otal" ,1)5

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"ehydration "ehydration is the process of remo;ing !ater ;apor or li

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Process Do! diagram

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Glycol contactor

+%yco%

contact

orNo o/ trays F

RealCray spacing

(/t)

5

*eir height (in) 5Fraction

0ooding

)1 .

ray diameter

(/t)

)32

Co%"mn height

(/t)

52

+%yco%

contractor

N"mber o/

stages

1

Stagenumbering Top do!n

&lash type #B

Process data (olumn type B

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Glycol Regenerator+%yco%

contractor

N"mber o/

stages

1

Stage

numbering

Top do!n

&lash type #B

Process data (olumn type B

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Output of dehydration unitProperties

emperature!otal"Pressure!otal"

Analysis

#ater $ew Point!%ree&e 1' otal"

$ew Point emperature!(apor Pressure 1'

)omposition

*+S!,ole %raction' otal"

)+!,ole %raction' otal"

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NG# Separation

Process descriptions and discussion oand results

Sale gas

compress

or

"uty 24*) ?pBHciency *4 .

Bnergy

--8T9Sale Gas

(ompressor(?G6311 6 8

JT ;al;e Pressure

drop

2/

bar

Names?5S-ole

&ractionC

(O5-ol

e

&raction

C

(?2-o

le

&ractio

nC

?5O-a

ss

&raction

C

-"BA-a

ss

&ractionC

TBG-a

ss

&raction

C

9nits ppm ppm . . . .

(ondensate60 52F 3/035 52)

11115

4 111 11111133