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WÄRTSILÄ OIL & GAS SYSTEMS AS
Gas Recovery Solutions Zero Flaring
Baku October 2013
Åge Wallentinsen
ZERO FLARING SYSTEM
A system for Zero Flaring enables the recovery of the gas that would normally
be flared during normal, stable production mode of the facility.
The system must be able to immediately and automatically return to flaring
mode when needed because of major process upsets or hazardous incidents.
The system will:
-Capture the gas normally flared (close flare line and provide alternative
route)
-Gather and boost the recovered gas if needed to meet system pressure
-Route the gas back into existing process or to new gas utilization system
-Provide automatic return to flaring when needed
-Ignite the gas at flare tip when returning to flaring mode
ZERO FLARING SYSTEM
Main features:
– Closed flare line
– Substantial reduction of CO2 & NOX emissions
– Increased profit due to the sales value of flare gas and reduction in CO2
tax (if applicable)
– Increased flare tip lifetime
– Flaring available upon demand
Bursting disc Fast opening valve
BASIC ELEMENTS OF THE SYSTEM
Design of the Flare Gas
Recovery system and
quick opening assembly
must be done to the
highest safety
standards.
To the flare stack
with Flare Gas
Ignition system
XV
HP K.O.
Drum
Bursting Disc
Flare sources
PT HH
PT HH
LO LO
High integrity flare
opening valve FOV Flare gas
recovery
system
©
Compression systems – compressor selection
• Typical compression solutions for natural gas application.
• We have experience from ejectors,blowers, screw compressors and liquid ring compressors
LOW PRESSURE GAS RECOVERY - CHALLENGES
• Low suction pressure
• Variations in suction pressure
• Variations in flow rate
• Gas composition – varying
• Gas composition – dew point
• Gas contamination - particles etc
LOW PRESSURE GAS RECOVERY - SOLUTIONS
The challenges can only be overcome by proper system design:
• Proper characterization of gas composition and flow rates
• Selection of right type of compressor
• Selection of right control philosophy
• Proper gas treatment
• If needed, gas pre-boosting
• If needed, gas treatment
RELIABLE AND SAFE IGNITION OF FLARE
Ignition cabinet
Guide pipe
Fragment collector
Ignition pellet
Low pressure flare ignition system
LP flare ignition system
Pellet is armed by pressure and ignited by
spring when exiting guide pipe
Launching
valve
Launching
tank
Pellet
Magazine
Guide pipe
BASIC SPECIFICATION:
Launching medium: Compressed
air/nitrogen
Launching pressure: 5-7 bar
(110 psi)
Launching range: Up to 2000m
Ignition pellet: L x D 100mm x 20mm
Weight ignition pellet: 80 gram
Min. bending radius guide pipe: 3,6 m
RELIABLE AND SAFE IGNITION OF FLARE
LP Ignition System
Video Ormen Lange
Video Ignition
Video Ignition Ekulama
II - SPDC Nigeria
FLARE GAS IGNITION SYSTEM – VIDEO’S
UTILIZATION OF RECOVERED GAS
In some cases (like remote areas) the gas can not simply be exported
through an existing pipeline, alternative utilization can be:
• Local electricity production (gas to wire)
• Local production of clean water (desalination of sea water or cleaning of
river/lake water)
• Mechanical power (drivers of pumps, compressors)
• Fuel gas for heaters
Economic gain in these cases can come from replacing use of diesel or
imported electricity.
For larger gas volumes:
• Convertion to LNG for transport
• Compression to CNG for transport
• Extraction of LPG components from gas (propane, butane)
ZERO FLARING BUILDING BLOCKS
LNG production
Fla
re G
as
Flare Ignition System
Pure water
production LPG Production
V Wärtsilä
GD engine
Power
Generation Power
Flare Gas Recovery
Gas Reformer
Recovery Utilization
GASLIFT
LP GAS
GAS
Wärtsilä DF Field Power
WÄRTSILÄ GAS RECOVERY SYSTEMS
Wärtsilä Gas Recovery Systems is a Business unit within
Wärtsilä Oil & Gas Systems. Our business idea is to:
develop and supply systems reducing emissions to air
from oil, gas and petrochemical installations.
Contact: [email protected]