Flare Gas Recovery Systems for Refineries and Industrial Facilities

• The gas (1) coming from the flare Process Unit enters the Liquid Ring Compressor (2) along with the process water (3).

• After the compression phase, the gas, water and hydrocarbon mixture enters the separator (4) where the three elements are parted: the gas passes through a demister (5) to have minimum water and leaves the vessel from the top, while condensed hydrocarbons and water are separated by gravity due to lower gas speed. 
• The water is pushed back to the compressor, after being cooled again by a cooler (6). 
• Moreover, a continuous process water make up line (7) in the compressor suction line is provided to ensure a continuous water ring in the compressor. 
• The condensed hydrocarbons are discarded (8).
• The gas exiting the separator finally heads to the Flare gas Amine Washing Unit (9) where it is amine treated to remove H2S. 
• The treated gas is then pushed to the Fuel Gas header to be used as fuel.

GARO liquid ring compressors are the core technology behind every flare gas recovery unit, providing safe and reliable compression of potentially explosive, corrosive, and contaminated gases. Liquid ring technology delivers near-isothermal compression, resulting in lower operating temperatures and dependable performance across a wide range of gas compositions.

As a critical component of a modern flare gas recovery system, liquid ring compressors can handle fluctuating gas flows, low suction pressures, and varying molecular weights while maintaining stable operation. They can also operate with different seal liquids, providing additional flexibility when processing toxic or corrosive gas streams.