GAS-DYNAMIC SEPARATION METHOD Russian patent published in 2009 - IPC F25J3/08 

FIELD: oil and gas industry.

SUBSTANCE: gas-dynamic separation method refers to the devices of low-temperature treatment of multi-component hydrocarbon gases (natural and oil ones), and is meant mainly for gas dehydration by condensing water component and (or) hydrocarbon components therefrom, and can be used in multi-component hydrocarbon gas collection, preparation and processing systems. Gas-dynamic separation method involves supply of high-pressure multi-component hydrocarbon gas flow to the nozzle, its isenthalpic expansion and cooling when passing through the nozzle, component condensation in cooled gas flow, condensate separation from gas phase, removal of cleaned gas and condensate, pressure increase of cleaned gas flow by its deceleration in diffuser. Original gas flow is pre-cooled by means of heat exchange with gas flow leaving the nozzle; components are condensed, separated from gas phase and removed at original gas pressure or (and) gas pressure after it has been expanded in the nozzle; gas phase is supplied to the nozzle after condensate is removed therefrom at original gas pressure, and pressure of expanded and cleaned gas flow is increased after its heat exchange with original gas.

EFFECT: improving gas-dynamic separation efficiency, and reducing energy consumption.

5 cl, 6 dwg, 7 tbl, 4 ex