LNG Process Presentation

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LNG Process Presentation

05 OCTOBER 2006, SENTRA MULIA

2EPT

Objectives

• To know How is LNG is made

• To know the Major Process Flow of How the LNG is processed

• To know the function of each Major Equipment that required in process to make LNG

3EPT

Contents

• LNG PROCESS DESCRIPTION

− Onshore Gas and Condensate receiving (Unit-16)

− Condensate Stabilization (Unit-11)

− Acid Gas Removal (Unit-21/22)

− Dehydration/Mercury removal (Unit-31/32)

− Gas Liquefaction/Fractionation (Unit-41/42)

− Refrigerant Circuit (Unit-051/52)

• LNG PROCESS SCHEMATIC

• PROCESS EQUIPMENT GENERAL ARRANGEMENT, FUNCTION AND DESCRIPTION

4EPT

LNG PROCESS DESCRIPTION

• Onshore Gas and Condensate receiving (Unit-16)

− Onshore Receiving Facility is to receive three-phase feed stocks from upstream production facilities, separate this into Gas, Hydrocarbon Liquid and Water Phases and Accommodate Liquid Slugs produced during non-steady operations.

• Condensate Stabilization (Unit-11)

− Condensate Stabilizer is to stabilize hydrocarbon condensate coming from ORF (unit-16), Dehydration and Mercury Removal (unit-31) and Acid Gas Removal (unit-21) to meet the product o specification such as Reid vapor pressure (Max 0.77 kg/cm2A@37.8oC) and also butane content (0.5 5 liquid volume max)

5EPT

LNG PROCESS DESCRIPTION (CONT’D-1)

• Acid Gas Removal (Unit-21/22)

− Acid Gas Removal is to remove Carbon Dioxide and Sulfur component in Feed Gas prior to Gas entering liquefaction unit. CO2 has no heating value and would freeze at low temperature in Cryogenic Process. Furthermore due to their Acidic/Corrosive Nature, Removal of CO2 and Sulfur enables the use of regular Carbon steel in downstream equipment and piping instead of corrosion resistance alloys.

• Dehydration/Mercury (Unit-31/32)

− Dry the Sweet Gas from the Acid Gas Removal Unit 021/022 before being sent to Liquefaction unit.

− Remove residual Mercaptans and Sulfur Compounds in Sweet Gas to meet the total Sulfur Specification in LNG Product (this is required if the sulfur content in Sweet/ Treated Gas leaving AGRU exceeds the Maximum Design Limit)

− Remove residual Mercury from the Sweat

6EPT

LNG PROCESS DESCRIPTION (CONT’D-2)

• Gas Liquefaction/Fractionation (Unit-41/42)

− Gas Liquefaction/Fractionation Unit is to liquefy a Natural Gas to produce Liquefied Natural Gas (LNG), Refrigerant Make-up components, and Condensate Product Streams.

• Refrigerant Circuit (Unit-051/52)

− Refrigerant Unit is to cool and liquefy the Feed Gas in the 041-E-1001 Main Cryogenic Heat Exchanger (MCHE) by maintaining the temperature approach on the Warm and Colds end to MCHE

− Propane refrigeration (four levels) provides chilling about -15oC for Natural Gas Feed and -32oC for the MR system and Fractionation Unit.

− Mixed Refrigerant (MR) refrigeration provide Low temperature refrigeration to produce LNG in MCHE. There are two GE Frame 7EA GT driving refrigerant Compressor. One for LP & MP MR and Second for HP MR & Propane Compressor.

7EPT

041-E-1001MCHE

WarmBundle

Middle Bundle

Cold Bundle

CONDENSATE

016-D-1009/10Liquid accmulator

016-D-1006/07Gas Scubber

016-D-1004Cond/WaterSeparator

011-T-1001A/BCondensate

Stabilizer

021-T-1001Acid GasAdsorber

031-D-1002ADehydration

Drum

031-F-1001Regen Gas Heater

031-D-1002BDehydration

Drum

031-D-1002CDehydration

Drum

031-D-1004MercuryRemoval

HP SG (-37 OC)

HP LNG (-153 OC)

MP LNG (-153 OC)

MR VAPOR(-157 OC)

MR LIQUID (-124 OC)

MR LIQUID (-124 OC)

JT VALVE

FEED GAS SWEET GAS

041-E-1003LP C3 Chiller

041-E-1002MP C3 Chiller041-T-1001A

Scrub Column

SWEET GAS (22 OC)

SWEET GAS (-15 OC)

041-GC-1001

051-GC-1001MR liquid Expander

LNG (-153 OC)

071-TK-1001LNG Storage

Tank

076-TK-1001Condensate

Storage Tank

FEED GAS(VORWATA-A/B)

051-C-1004HP MR Comp

051-C-1001C3 RefrigerantCompressor

051-CS-1001Steam Turbine

051-C-1002LP MR Comp

051-C-1003MP MR Comp

051-CS-1002Steam Turbine

MR VAPOR(-37 OC)

MR VAPOR(41 OC)

051-E-1007

051-E-1009

051-E-1010

051-D-1010HP MR

Separator

MR LIQUID(-32 OC)

MR VAPOR(-32 OC)

LEAN AMINE

RICH AMINEAMINE REGENERATION

REGENERATIONGAS

HP SWEET GAS (-70 OC)

HP SG (-70 OC)

051-CG-1001Gas Turbine

051-GC-1002Gas Turbine

016-D-1001/02Slug Catcher

051-D-1007LP MR Comp Suct. Drum

051-E-1006

HP MR After

Cooler

LLP C3

LP C3

MP C3

HP C3

DISCH

041-T-1001BScrub Column

041-T-1002Deethanizer

041-T-1003Depropanizer

041-T-1004Debutanizer

CONDENSATE

BUTANE RECYCLE (45 OC)

MP LPG REINJECTION (-32 OC)

Acid Gas Incinerator

BOG

071-C-1001A/BBOG Compressor

041-D-1001Scrub

ColumnRefluxDrum

031-D-1001DehydrationPrecoolerSeparator

021-D-1004Feed Gas K.O. Drum

051-E-1008

HP C3

MP C3

MP C3

BOG

LP C3

MP C3

LP C3

MP C3

SWEET GAS F/ 021-T-1001

SWEET GASTO 031-D-1001

MP C3

C3 MAKE-UP

HP C3 VAPOR

MR VAPOR(-153 OC)

HP C3

031-E-1001

031-E-1001

LNG Process Schematic

8EPT

016-D-100 SLUG CATCHER

• Separate into GAS and MIXURE OF HYDROCARBON LIQUID and WATER

9EPT

016-D-1006/07 GAS SCRUBBER

• Separate Vapor (Sour Natural Gas) and Condensed Water

• A Vessel designed to handle streams with High Gas to Liquid Ratios. The Liquid is generally entrained as mist in the Gas or is free-flowing along the pipe wall. These vessels usually have a small liquid collection section.

10EPT

016-D-1009/10 LIQUID ACCUMULATOR

• Temporary Liquid Storage with Slug Volume of 111.3m^3

11EPT

016-D-1004 CONDENSATE WATER SEPARATOR

•Separation of Flash Gas, Hydrocarbon Condensate and Water

12EPT

011-T-1001 A/B CONDENSATE STABILIZER COLUMN

• To stabilize the Hydrocarbon Condensate from ORF, Dehydration and Mercury Removal and Acid Removal that are combined

13EPT

021/022-D-1004 FEED GAS KNOCK-OUT DRUM

• To separate any Heavy Hydrocarbon that might be condensed. By removing Heavy Hydrocarbon upstream the absorber, the foaming tendency of Amine Circulation system can be Minimized.

14EPT

021/022-T-1001 ACID GAS ABSORBER

• To remove CO2 from the Feed Gas by chemical reaction between MDEA and water to obtain protonated species and bicarbonate. The absorption is a accelerated by fast reaction between CO2 and piperazine, which together form Carbamate. The Carbamate in turn reacts with the bulk aqueous MDEA and transfers its CO2 to MDEA

15EPT

031/032-E-1001 DEHYDRATION PRECOOLER

• The Sweet Gas is cooled down to 22oC by HP Propane Refrigerant. The temperature is above the Hydrate Formation and Maximizes amount of Water Condensed prior entering Molecular Sieve Beds.

16EPT

031/032-D-1001 DEHYDRATION PRECOOLER SEPARATOR

• To separate Gas, Water and Small amount of Heavy Hydrocarbon condensed. Liquid Hydrocarbon are sent to Condensate Stabilizer, While water is sent to Skimmer

17EPT

031/031-D-1002A~C DEHYDRATION DRUM

• To adsorb Water and Sulfur by using Molecular Sieve Beds to meet Gas Dryness Specification of less than 0.1 ppmv and Total Sulfur Specification of less than 17.5 ppmv

18EPT

031/032-D-1004 MECURY REMOVAL

• To remove Residual Mercury from the Gas to very low concentration of 0.01 micrograms/Nm^3, using Non-regenerable Sulfur Impregnated Carbon Bed with the Gas in down-flow.

19EPT

041/042-E-1002 FEED GAS/MP C3 CHILLER

• The Sweet Gas is cooled down from 22 oC to 1.39 oC by MP Propane Refrigerant.

20EPT

041/042-E-1003 FEED GAS/LP C3 CHILLER

• The Sweet Gas is cooled down from 1.39 oC to -14 oC by MP Propane Refrigerant

21EPT

O41/O42-T-1001A/B SCRUB COLUMN

• Benzene and other Heavy HC are removed from Natural Gas to avoid Freeze-Up in the Final Liquefaction steps and to comply with LNG Specification

• Sufficient Feed Gas component are provided for further processing in the Fractionation Unit to produce HC components for Refrigerant make-up of the Refrigerant System.

22EPT

041/042-D-1001 SCRUB COLUMN REFLUX DRUM

• To separate Vapor Stream of Sweet Gas from Warm Bundle of MCHE prior introduce to Middle and Cold MCHE . Liquid Stream is used for Reflux for Scrub Column O41-T-1001

23EPT

041/042-E-1001 MAIN CYROGENIC HEAT EXCHANGER

24EPT

051-C-1002/1003 LP/MP MR COMPRESSOR

51-C-100251-C-1003

51-CS-1002

51-GC-1002

25EPT

051-C-1001/1004 REFRIGERANT COMPRESSOR

51-C-100451-C-1001

51-CS-1001

51-GC-1001

LLP

LP

MP

HP

26EPT

071-TK-1001 LNG STORAGE TANK

27EPT

076-TK-1001 CONDENSATE STORAGE TANK