METHOD AND PLANT FOR DEETHANIZATION GAS CONDITIONING FOR TRANSPORTATION IN GAS PIPELINE

摘要

FIELD: oil and gas industry.;SUBSTANCE: method and plant for deethanization gas conditioning for transportation in a gas pipeline include stages of compression, cooling and separation of the cooled deethanization gas. The feed deethanization gas is succesively let through three gas separators and condensate separator. After the third gas separator deethanization gas is mixed in a mixer with pipeline dry hydrocarbon gas containing principally methane. The cooled gas mixture is heated with the heat of the feed deethanization gas in a recuperative heat exchanger. Then the prepared deethanization gas is directed to the gas pipeline as a raw material for gas and chemical enterprises. The condensate from the second and third gas separators is mixed, preheated in the first recuperative heat exchanger by a hot deethanization gas stream after the compressor and separated in the condensate separator. The separated gas is mixed with the feed deethanization gas.;EFFECT: removal of hydrocarbons down to a level where their condensation in the pipeline is prevented in the winter conditions and the Far North conditions with both low pressure dew point for hydrocarbons and acceptable ethane content.;15 cl, 4 tbl, 1 dwg