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Gas Liquids Recovery & Fractional Systems

Mechanical refrigeration, adsorption, and auto-refrigeration units are specifically designed for the recovery of hydrocarbons and to control dewpoints. 

Exterran’s mechanical refrigeration systems utilize propane refrigerant as a cooling medium circulated by rotary screw or reciprocating compressors in a closed cycle system. Gas/gas heat exchangers pre-cool inlet gas before exposure to the refrigerant in a chiller vessel. Liquid hydrocarbons are separated in the low temperature separator.

These complete systems are packaged on skids with piping, valves, and instrumentation. 

Hydrocarbon liquids are typically stabilized to or stored under pressure in an LPG mixture. 

Hydrates are controlled by glycol re-injection and regenerated by a glycol reboiler.  Desiccants can be used for adsorption of hydrocarbons, as well as water.  Desiccants are regenerated by circulation of hot gas, which is air-cooled before separation of condensed hydrocarbons.  This rich regeneration gas is then circulated with raw inlet gas.  The auto refrigeration units (JT Plants) are designed similarly to mechanical refrigerant systems, but utilize a pressure drop of inlet raw gas to provide corresponding temperature drops for condensing and recovery of hydrocarbon liquids.

Product Offerings Include:

• Hydrocarbon dewpoint control and LPG recovery plants
• Hydrocarbon treating
• Cryogenic turbo-expander units
• Joule-Thompson expansion plants
• Product fractionation C2/C3/C4/NGLs
• LPG extraction for peak load shaving