MECHANICAL REFRIGERATION (MRU) SOLUTIONS PROVIDED BY ETI

 

Engineering Technology & Innovation, LLC, (ETI) provides treatment systems to process and remove heavy hydrocarbons and water from natural gases. The process equipment consists of standalone vessels and skid-mounted modules. A MRU consists of two operations: a cold separator and a refrigeration system. A regeneration system may be employed to minimize solvent costs.

The components of a mechanical refrigeration plant are: inlet separator or filter separator, exchangers, chiller and refrigeration system (compressor, condenser/air cooler, receiver, and instruments, controls, and accessories) and glycol/methanol injection. The refrigeration systems most commonly used are propane or ammonia systems, although non-CFC Freons are also used.

 

REASONS FOR MRU TREATMENT

ETHYLENE GLYCOL REGENERATION SKIDGas engines for compression or pumping require a high quality fuel gas.  Fuel gases must be conditioned to lower the heating value of the gas by removing the majority of the heavy hydrocarbon components, butane and heavier nC4+. A mechanical refrigeration system is quite similar in process scope to the Joule-Thompson auto-refrigeration fuel gas treating units. The process gas stream is injected with a hydrate inhibitor such as methanol or ethylene glycol. The process gas temperature is lowered to between 0°F and -40°F. Heat exchangers conserve chilling requirements. The recovered hydrocarbon liquid is either combined with other production liquids or stabilized as LPG.  To reject absorbed water, a regeneration package consisting of: heat exchangers, flash separator, particulate filter, charcoal filter, electric- or gas-fired heated glycol reboiler, glycol stripper, reflux tower, and injection pumps is utilized. A typical MRU will lower the HHV of the fuel gas to 1050 Btu/scf or less, the Methane Number, MN >65, and the butane number, NBN<4.5.

 

FEATURES

  • SKID-MOUNTED MODULES
  • ECONOMICAL OPERATION
  • EFFICIENT OPERATION
  • CLOSED SYSTEM
  • UNATTENDED OPERATION
  • REGENERATION OF MEG
  • STAINLESS STEEL VALVE TRAYS
  • MEG CIRCULATION RATES FROM A FEW
    TO SEVERAL GPM FLOW
  • STAINLESS STEEL MEG STRIPPING
    COLUMN OPTION
  • VENTING, INCINERATING OFF GASES
  • DOESN'T REQUIRE COMPRESSION OF
    GAS STREAM
  • COMPACT MODULES
  • MINIMAL HYDRATE INHIBITOR INVENTORY
  • LOW HYDRATE INHIBITOR MAKEUP
  • UP AND DOWN STREAM FILTER/COALESCING
  • HEAT STABLE SALTS
  • LOCAL OR REMOTE CONTROL OPTIONS
  • RECTIFICATION OF STRIPPED GLYCOL