STP Specific Training Packages. Sakhalin Energy LNG/OET/TLU

1.

STP
Specific Training Packages
7000-S-62-90-T-0001-00
Specific Training Package
1

2.

Sakhalin Energy LNG/OET/TLU
STP
Unit 6200
Specific Training Package
2

3.

The purpose of STP Training is that the operator
will have understanding and awareness of the following topics.
1.
Process Introduction
2.
Purpose of the Unit
3.
Process description
4.
Equipment
5.
Health, Safety and Environment
6.
Routine checks
Specific Training Package
3

4. Introduction to the unit

To collect and dispose vapour and liquid in a safe manner:
Types of gas and 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.
Liquid disposal burners.
Specific Training Package
4

5. Purpose of the unit

Purpose:
The purpose of the unit is to safely collect and dispose
vapor or liquid hydrocarbons that result from upsets and
emergencies.
The unit can also handle streams as a result of operational
conditions such as start-up, shutdown, venting, draining
and purging. Also warm up and cool down of equipment or
piping is accommodated.
Specific Training Package
5

6. Unit 6400 position on the Plant overview

pig
U/S
3600
6400
ETP
3300
0300
F4101
4000
EDG
A4420
K4701AB
U/S
U1100
1500
1400
4100
4200 4400
U1300
4000
GTG
U4100
K1440
U4200
K4401
Train 1
K4711
U1100
4300
4600
9000
K1420/30
Train 2
A1911
A4720AB
K1450
4200
1100
4800
1500
1400
4100
4200 4400
6400
CDF
U1300
U4100
U4200
K1440
K1450
K1420/30
6200
3400
K3401
pig
1000
1600
3100
3400
6000
4100
4900
Specific Training Package
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7. Process description

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.
Vapours from V-6201 are routed and burned to warm flare
6201 via 56” line.
A-
Specific Training Package
7

8. Process description

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-6201A/B via 6” line.
Specific Training Package
8

9. Process description

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.
Specific Training Package
9

10. Process description

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.
Liquid from V-6202 is drained by gravity to the blow cases
(V-6207A/B) via an 8” line which transfers the liquid to the cold
liquid burners A-6205A/B. HP fuel gas is used as motive or
pressuring gas.
Specific Training Package
10

11. Process description

Operational Flare System (FOP)
Operationally initiated release is vented
to separate 16” FOP header.
The vented gas is routed to V-6203 and
burned in operational flare, A-6211.
Picture not SEIC specific
Specific Training Package
11

12. Process description

Warm Flare System – FWW
Vapour collection point from
Unit 1000,1100,1300,1350,1400,
1500,1900,4000,4100 and 4400
Liquid disposal point – DHC
Collects liquids from
Unit 1000,1100,4400,1400 and unit
1500
Specific Training Package
12

13. Process description

Cold Flare System collection point - FCD
Unit 1400, liquefaction and MR compressor
Unit 1500, fractionation unit
Unit 1600, refrigerant storage
Cold liquid disposal point- DLH
Unit 1400, liquefaction and MR compressor
Unit 1500, fractionation unit
Specific Training Package
13

14. Process description

LNG Storage and Loading Flare – FLP
Unit 3400, LNG storage and loading
Boil-off gas compressors dry gas seal, relief valves
Operational Flare System – FOP
Unit 1400, liquefaction and MR compressor
Specific Training Package
14

15. Process description

Fuel Gas:
High pressure fuel gas is used for:
Motive gas in the blow cases V-6207A/B.
Atomising gas.
Fuel gas pilot burners.
Fuel gas for the flame front generators.
Low pressure fuel gas is used for:
Purging.
Specific Training Package
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16. Process description

Blow case:
Liquid from the cold flare KO
drums is drained by gravity to
one of the two blow case vessels.
HP fuel gas is used to pressurise
the blow case before displacing
the liquid to the cold liquid burner.
Specific Training Package
16

17.

Flare Overview
F-WW
D-HC
F-CD
D-LH
Start
up
F-LP
F-OP
HP Fuel Gas
Specific Training Package
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18. Major equipment

3 flare KO drums
One blow case (two vessels)
Two warm liquid disposal pumps
One warm flare
One cold flare
One storage and loading flare
One spare flare
One warm liquid burner
Two cold liquid burners
Two flame front generators
Specific Training Package
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19. Health, Safety and Environment

Health, Safety:
Noise when the flare is operating.
Radiated heat from the flare.
Nitrogen can be asphyxiating in high
concentration.
Cryogenic temperatures.
High pressures.
Specific Training Package
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20. Environment

Controlled releases to atmosphere from
the flares and liquid disposal burners pose no
harm to the environment.
Uncontrolled releases can occur as a result of a plant
emergencies, and short term air pollution from the
unburnt gases.
Specific Training Package
20

21. Routine checks

Routine checks:
Check for leaks.
Check running equipment for any abnormal noise.
Fill in log sheet.
Check on night shift if the pilot burners are on.
Specific Training Package
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