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Flare Gas Recovery 

Flare Gas Recovery Systems (FGRS) are specialized compression packages, which aim to recover and repurpose gasses and emissions, such as methane/LPGs and sulfur dioxide, that would normally be burned during the flaring process. Key to the safe operation of refineries and petrochemical facilities, the process involves capturing the gas from the flare knock-out vessel and compressing it using liquid ring compressors. The so-recovered gases can be reused within the facility’s fuel gas system, as a refinery feedstock or for re-injection.


flare gas white paper

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flare gas recovery case study

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Case Study

white paper wais

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White Paper

WAIS case study

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Case Study

A FGR System provides a number of environmental and economic benefits to refineries, such as:

  • Lower Emissions: Recovering waste hydrocarbons allows refineries to reduce the amount of toxic gasses, such as hydrogen sulfide (H2S), which are burned and released into the environment during the flaring process.
  • Reduced Operating Costs: Refineries can re-use recovered gasses, composed mainly of low molecular weight hydrocarbons (LPGs), resulting in a reduction in fuel gas cost for the facility. This is in addition to saving that could be made as a result of reduced Greenhouse Gas emissions, or through the sale of recovered gasses.
  • Social & Environmental Responsibility: Lowering C02 emissions generated by facilities not only help organizations meet environmental regulations, but also demonstrate an awareness and commitment to social responsibility, and build goodwill within the surrounding community.

Garo liquid ring compressors are the key-element of Flare Gas Recovery Units, providing safe and reliable compression of refineries’ potentially explosive and dirty gases. Liquid ring technology runs at cooler temperatures and can work with a variety of seal liquid allowing for flexibility in treating toxic or corrosive compounds in the process gas.


Advantages at a Glance

  • Near zero flare emissions
  • Improved community relations
  • Recovered gas for facility fuel gas
  • Reduced utility steam consumption Increased flare tip life
  • Ease of installation Reduced noise and light pollution
  • Quick payback


Do you know about the newest application of Garo liquid ring compressors for Flare Gas Recovery?

Garo has patented a liquid ring compressor integrated system, able to compress and scrub refinery flare gases, using amine as service liquid. This system, called Garo WAIS (Washing Amine Integrated System) has a double scope: compress the gas and simultaneously clean it from H2S. The gas exiting the compressor is ready-to-use and does not need any other cleaning process through amine washing towers. Click HERE and discover more.

GARO Liquid Ring Compressor System for Flare Gas Recovery

GARO Systems for Flare Gas Recovery

Key Features

  • Rugged Design Construction - tolerant to carryover from process upsets
  • Low Maintenance Requirements
  • Cool Running Liquid Ring Technology - ideal for handling caustic gases
  • Simplified Process - Patented GARO WAIS System uses Amine to clean gas as it condenses
  • Global Technical Support & Service

Low Pressure Gas Recovery

GARO Single Stage Liquid Ring Compressor Package

  • Pressure range: up to 5 Bar Abs
  • Flow rate range: up to 5000 Am3/h per single compressor.
  • Materials: Stainless Steel, Duplex, Alloy825 steel; other materials upon request.
  • Sealing type: dual mechanical seals in back to back or tandem arrangement

High Pressure Gas Recovery

GARO Two Stage Liquid Ring Compressor Package

  • Pressure range: up to 13 Bar Abs
  • Flow rate range: up to 4000 Am3/h per single compressor
  • Materials: Carbon Steel, Stainless Steel, Duplex and Super Duplex Stainless steel; other materials upon request
  • Sealing type: dual mechanical seals in back to back or tandem arrangement