• NGL RECOVERY

    DEEP CUT

    Deep Cut is a natural gas liquids (NGL) process to achieve a high recovery of ethane (C2) or propane (C3) from natural gas, typically at cryogenic temperatures. The specific arrangement and design varies and depends on the feed gas composition, required NGL recovery and mode of operation.

3D DESIGN
Deep Cut
TURBO EXPANDER

DEEP CUT DESIGN CONSIDERATIONS

Liquid Reflux
• Provides a lean reflux stream to rectify vapours
• Critical factor for high/medium/low recovery level

Mechanical Refrigeration
• Turbo expander/compressor or Joule Thompson effect provides chilling
• Enhancement using propane refrigeration

Market Evaluation
• Variability in commodity market reflects preferred recovery
• Preference for C2 recovery or C2 rejection

Contaminant and Impurities
• Treated and removed upstream to acceptable levels
• Excess carbon dioxide (CO2) results in freezing

Brazed Aluminum Heat Exchanger (BAHX)
• Multiple pass design and tight approach temperature
• Recovers cooling duty

Residue Gas Compression
• Recovered energy from turbo expander/compressor
• Process type can minimize compressor power requirements