LNG Prigorodnoye Overview Prigorodnoye LNG Overview GAS TURBINE

LNG Prigorodnoye Overview Prigorodnoye LNG Overview

GAS TURBINE COMPRESSOR 65 – 90 barg BOOSTER 60 barg LIQUIFICATION -COLD END LIQUIFIED NATURAL GAS PIPELINE OPF PRIGORODNOYE 65 – 90 barg PRESSURE CONTROL LNG OPERATIONAL OVERVIEW METHANE GAS LNG TRAIN 1 LPG RE-INJECTION E 1401 Hg REMOVAL WATER REMOVAL GAS TREATING –WARM END CO 2 REMOVAL LPG E 1402 REFRIGERANT STORAGE SCRUB STORAGE & LOADING FRACTIONATION U-1500 STORAGE TANK LNG TRAIN 2 Prigorodnoye LNG Overview

SEIC LNG Train 1 Prigorodnoye LNG Overview

LNG Plant Overview Substation Elec/Inst Prigorodnoye LNG Overview

Unit 1000 Inlet Metering Feed gas from the OPF enters unit 1000 between 65 to 95 bar at ~20 o C. The gas leaves the unit at 60 bar at temperature of ~0 o C. The feed gas from U 1000 is fed to U 1100. Unit 1000 consists of three parallel meter runs, each consisting of a feed gas mono-cyclone separator (V-1001 A/B/C), and a flow/pressure control station. This maintains the feed gas supply pressure at 60 bar to the LNG plant. Each meter run is capable of supplying 33. 3% of the overall design gas Flow for the two LNG trains. Prigorodnoye LNG Overview

U-1000 Gas Inlet and Metering Gas Pipeline From OPF V 1001 A/B/C gas separators with flow & pressure control Prigorodnoye LNG Overview

Unit 1100 Acid Gas Removal unit. Purpose of the Acid Gas Removal unit is to remove CO 2 and H 2 S from the natural gas. Why? To prevent freezing and blockages in the liquefaction unit (U 1400). Each train has its own dedicated acid gas removal unit. The solvent used in the unit is Shell Sulfinol D. The solvent is made up of the following: Ø Water 25%. Ø Di-isopropanolamine (DIPA) 50%. Ø Tetra-hydrothiophene-dioxide (Sulfolane) 25%. Prigorodnoye LNG Overview

U-1100 Acid Gas Removal Unit U 1100 Sulfinol Treating Substation Elec/Inst Prigorodnoye LNG Overview

U-1100 Acid Gas Removal Unit V-1103– Regenerator Overhead Accumulator C-1101 – Absorber C-1102 – Regenerator V-1101– Feed Gas Knockout Vessel Prigorodnoye LNG Overview

Transporting C 1101 for installation during construction Prigorodnoye LNG Overview

U 1100 Principle Operation Treated gas to driers Lean amine CO 2 Out Absorber Regenerator CO 2 is soaked up by the amine and removed in the regenerator C 1101 To fuelgas Rich amine C 1102 Raw gas U 1000 Heat In GAS SEPARATOR V 1102 Prigorodnoye LNG Overview

Purpose of U 1300/U 1350 Dehydration unit 1300 To remove water present in feed gas from Unit 1100. Why? To prevent downstream equipment blockage and damage by ice and hydrate formation during the gas liquefaction process. Mercury removal vessel 1350 To remove trace quantities of mercury that could be present in the feed to liquefaction. Why? To prevent corrosion in the downstream equipment, and aluminium tube bundles of the MCHE’s. Prigorodnoye LNG Overview

U-1300 Dehydration Unit and U-1350 Mercury Removal Substation Elec/Inst Prigorodnoye LNG Overview

U-1300 Dehydration Unit and U-1350 Mercury Removal C-1351 – Mercury Absorbent Vessel C-1301 A/B/C – Molsieve Dryer Vessels Prigorodnoye LNG Overview

FAR, Substation and Analyzer House FAR 1 SS-410 ANC-1 Prigorodnoye LNG Overview

Purpose of Unit 1400 In unit 1400, the feedgas is progressively cooled until it condenses at around – 158 degrees C and is subcooled to – 162 before running down to the storage tanks. This reduces the overall volume around 600 times allowing one LNG tanker able to carry 600 times more than if the natural gas remained in a gaseous state. (135, 000 m 3 LNG = 81, 000 m 3! gas) Prigorodnoye LNG Overview

REFRIGERATION PRINCIPLES Compressing a gas makes its pressure and temperature rise because of the energy we have given it. Depressuring this gas again would result in the pressure and temperature returning to the same point as we started. We have not changed this gas in anyway! Prigorodnoye LNG Overview

REFRIGERATION PRINCIPLES HOT HIGH Temperature Pressure We can graph this and see exactly what has happened. 0 COLD LOW 0% Compression 100% 0% Prigorodnoye LNG Overview

REFRIGERATION PRINCIPLES HOT HIGH Temperature Pressure This time, after compressing the gas we will cool it to remove the heat energy we gave it. 0 COLD LOW 0% Compression 100% 0% Prigorodnoye LNG Overview

REFRIGERATION PRINCIPLES HOT HIGH Temperature Pressure This time when we depressure the gas the temperature becomes very low! 0 Additional temperature drop COLD LOW 0% Compression 100% 0% Prigorodnoye LNG Overview

GAS TREATED FEEDGAS LIQUID LNG PLANT PRINCIPLES HP +10 LP PMR -80 HP LP -180 MR -162 LIQUIFIED NATURAL GAS Prigorodnoye LNG Overview

Purpose of Unit 1400 Treated feed gas from the mercury removal unit (U 1350) is cooled against low pressure PMR in E-1402 and fed to the scrub columns. The scrub columns, C-1401 & C-1402, remove heavy hydrocarbons (C 5+) and the LPG’s from the natural gas stream for 2 reasons. • These gases will condense too early in the fractionation section • The LPG’s are used as the refrigerant in U 1400 cooling circuits. The bottom product of the scrub columns is fed to the fractionation unit (U 1500). Prigorodnoye LNG Overview

Purpose of Unit 1400 (Cold End) Substation Elec/Inst Prigorodnoye LNG Overview

LNG PLANT DETAILS Prigorodnoye LNG Overview

U-1400 Liquefaction Unit C-1402– Upper Scrub Column E-1412– LP Pre-cool Exchanger E-1411– HP Pre-cool Exchanger C-1401– Lower Scrub Column Prigorodnoye LNG Overview

U-1400 Liquefaction Unit Main Cryogenic Heat Exchangers Substation Elec/Inst Prigorodnoye LNG Overview

U-1400 Liquefaction Unit E-1415 A – Main Cryogenic Heat Exchanger E-1415 B – Main Cryogenic Heat Exchanger Prigorodnoye LNG Overview

U-1400 Liquefaction Unit Internals of the Main Cryogenic Heat Exchanger Prigorodnoye LNG Overview

U-1400 Liquefaction Unit Substation Elec/Inst Prigorodnoye LNG Overview

U-1400 Liquefaction Unit V-1420 – LP MR Suction Drum V-1430 – Endflash Vessel V-1425 – HP/MR Separator E-1430 – Light MR/Endflash Exchanger Prigorodnoye LNG Overview

Process Description - PMR The PMR (pre-mixed refrigerant) system utilizes pressurized PMR, a mixture of ethane and propane, evaporating at two pressures. This supplies refrigeration to the NG feed circuit, the MR circuit and the fractionation unit. The PMR is compressed by gas turbine driven PMR compressor K 1440, power assisted by PMR compressor helper motor/generator (KM-1440). Prigorodnoye LNG Overview

Process Description - PMR Substation Elec/Inst Prigorodnoye LNG Overview

K-1440 PMR Compressor HELPER MOTOR CENTRIFUGAL COMP GAS TURBINE Prigorodnoye LNG Overview

Process Description - MR MR – Mixed Refrigerant The refrigeration to fully liquefy the feed gas is provided by MR (mixed refrigerant). This is a mixture of nitrogen, methane, ethane and propane. The MR system is a closed loop refrigeration system utilizing two compressors in series, K 1420/30. They share a single shaft and are gas turbine driven. The LP MR compressor (K-1420) is a single stage axial machine and the HP MR Compressor (K‑ 1430) is a two stage centrifugal machine. The MR compressor starter/helper motor (KM‑ 1420) is used for starting the compressor, and also to provide additional shaft power to maximize LNG production. Prigorodnoye LNG Overview

Process Description - MR Substation Elec/Inst Prigorodnoye LNG Overview

K-1420/K-1430 MR Compressor MAN HELPER MOTOR CENTRIFUGAL COMP AXIAL COMP GAS TURBINE Prigorodnoye LNG Overview

Process Description - End Flash System Nitrogen in the LNG stream leaving the MCHE’s is removed in the end flash vessel. The nitrogen and some light hydrocarbons leave the top of the end flash vessel and exchange cooling in the light MR/end flash gas exchanger. The gas is then compressed by the end flash gas compressor (K 1450) and routed via the end flash compressor after-cooler to the HP fuel gas system. Prigorodnoye LNG Overview

K-1450 End Flash Compressor Prigorodnoye LNG Overview

U 1500 Process Description Purpose of Unit 1500: To remove heavy components from the feed gas To extract refrigerant components, and make up ethane and propane for storage. Also to produce stabilized condensate for re-injection in the crude oil. Any LPG’s not used in the refrigerant circuit are re-injected back into the liquefaction section as part of the LNG rundown. Prigorodnoye LNG Overview

E 1504 E 1502 -15 deg. C -10 deg. C E 1415 PMR C -30 deg. C 35 deg. C Vapour Make up C 3 V 1502 2 V 1503 C 1401 V 1504 C 4 P 1503 U 1600 C 2 Make up C 3 Make up C 2 NGL C 3 NGL C 4 NGL E 1510 27 barg 14 barg C 1501 9 barg C 1502 E 1501 C 3+ 103 deg. C 99 deg. C 109 deg. C 85 deg. C Stabilised condensate OET -13 deg. C E 1513 PMR C 5 + E 1507 U 1600 Re-process NGL re-injection P 1505 C 4 + E 1505 E 1503 C 1504 67 deg. C HTF HTF 86 deg. C C 2 + 3 barg C 1503 HTF V 1425 Re-process 7 deg. C NGL C 2 C 3 C 4 38 deg. C 40 deg. C P 1502 -50 deg. C E 1415 Vapour Make up P 1501 C 1 E 1506 33 deg. C E 1508 P 1504 Prigorodnoye LNG Overview

U 1500 Process Description Substation Elec/Inst Prigorodnoye LNG Overview

U-1500 Fractionation Unit C-1501– Demethanizer Column C-1502– Deethanizer Column C-1503– Depropanizer Column C-1504– Debutanizer Column V-4201– Tempered Water Expansion Vessel Prigorodnoye LNG Overview

U 1600 Process Description The ethane and propane/PMR storage systems are common to both LNG Trains and are used primarily to supply start-up refrigerant for the PMR and MR cycles in the Liquefaction Unit, U-1400. The purpose of Unit 1600 is to provide storage for refrigerant grade ethane and propane produced in Unit 1500 De-ethaniser and the De-propaniser. Prigorodnoye LNG Overview

U-1600 Refrigerant Storage T-1601 – Ethane Storage T-1602 – PMR Storage Prigorodnoye LNG Overview

LNG Storage Tanks T-3102 LNG Tank No. 2 T-3101 LNG Tank No. 1 Prigorodnoye LNG Overview

LNG Storage Tanks / Boil Off Gas To store and load Liquefied Natural Gas and to collect and compress the vapor generated from the process of filling the tanks. This is known as BOG (boil off gas) Vapor created when loading LNG ships (ship vapor return) is used as fuel gas Prigorodnoye LNG Overview

LNG Storage Tanks / Boil Off Gas There are two LNG Storage tanks each with a capacity of 100, 000 m 3 • Eight loading pumps each with a discharge capacity of 1250 m 3/Hr • One boil off compressor with a capacity of 730 T/D There are Four loading arms, Two for LNG liquid, One vapour return arm & a spare for either liquid or vapour service allow ship loading to be carried out based on a 24 hour turn around. Prigorodnoye LNG Overview

K 3401 Boil off gas Fuel gas system F L A R E PC Boil off gas header TC End Flash compressor V 3401 V ap ou r. A rm LC Lo ad in g A rm T 3100 LNG Loading line Prigorodnoye LNG Overview

Emergency Flare stack Unit 6200 Flare system Liquid disposal burners and Ops flare Prigorodnoye LNG Overview

Unit 6200 Flare system Why do we have a Flare System? The flare system is used to collect and dispose vapour and liquid in a safe manner. (Safe disposal of Hydrocarbons, the first system online and the last system shut down) Flare Systems • Emergency operational system for cold, light, dry streams, liquid and vapour. • Emergency operational system for warm, heavy, streams, liquid and vapour. • Emergency operational system for LNG storage and loading, vapour. • Operational flare system, vapour. • LNG disposal system, liquid and vapour (start-up). • Spare flare can be used for cold and warm service. Prigorodnoye LNG Overview F L A R E

Unit 6200 Flare system Warm Flare System (FWW) All the warm vapours are collected into a single 48” header which slopes to the liquid knock-out drum V-6201. The header is continuously purged with LP fuel gas at sufficient flow rate to keep velocity at the tip of flare stack. Nitrogen connection is also given as back-up purge source. Warm Liquid Disposal System (DHC) The warm liquids from manual drains are collected in a 4” header and routed to V 6201. Light components are flashed-off and burned in A-6201 (FWW) The accumulated liquid in V-6201 is pumped and transferred to warm liquid burner A-6204 by P-6201 A/B via 6” line. Prigorodnoye LNG Overview

Unit 6200 Flare system Cold Flare System (FCD) Cold dry and light hydrocarbon vapours from unit 1400, 1500 and 1600 are collected into a 48” header which slopes to the cold flare KO drum V-6202. The header is continuously purged with LP fuel gas. Nitrogen connection is also given as back-up purge source. Vapour from the cold flare KO drum is directed to the cold flare (A‑ 6202) through a 56” line. HP fuel gas is used as atomising gas to flare stack A-6202 Cold Liquid Disposal System (DLH) All the cold liquids are collected into two 12” headers that are routed to the cold flare KO Drum (V‑ 6202). flashed vapours are removed and burned in A-6202. Operational Flare System (FOP) Any operationally initiated release is vented to a separate 16” FOP header. The vented gas is routed to V-6203 and burned in operational flare (A-6211) Prigorodnoye LNG Overview

Unit 6200 Flare system Prigorodnoye LNG Overview

Unit 6200 Flare system Prigorodnoye LNG Overview