METHOD FOR PARAFFIN CONDENSATE DEETHANIZATION Russian patent published in 2017 - IPC B01D19/00 B01D3/14 B01D3/22 B01D3/42 

FIELD: gas industry.

SUBSTANCE: invention relates to gas industry and can be used for centralized decanonization (partial stabilization) of unstable paraffin condensate in distillation columns supplied from the fields of gas condensate deposits, operating without the use of upper condensation irrigation. Method for deethanization of unstable paraffin condensate, when unstable paraffin condensate is heated to supply deethanization column and deethanize using unheated unstable condensate with low content of paraffins for irrigation of deethanization column, consists in the fact, that deethanization column is equipped with valve plates, providing constant material mass loading within the range of loads at the flow of steam and liquid phases from 100 to 50 % of maximum and stable quality of deethanization products – residual content of hydrocarbons C₁-C₂ in deethanized condensate is not more than 0.8 wt%, residual content of liquid hydrocarbons C₅₊ in deethanization gas is not more than 3 wt%; provided that adjustable addition of flow portion used for irrigating deethanization column of unstable condensate with low content of paraffins into the feed flow of deethanization column, providing maintenance of loads on the flow of steam and liquid phases in the working range from 100 to 50 % of maximum, given that the content of evaporative components C₁-C₄ in unstable paraffin condensate is less than 15 wt%, and maintaining rated content of paraffins in deethanized condensate at a level no higher than 4 wt%.

EFFECT: technical result consists in ensuring efficiency of unstable paraffin condensate deethanization in distillation columns without upper condensation irrigation not less than 1,3 million tons/year, as well as providing flexibility of process – maintaining specified values at constant level when deethanizing raw materials of different composition – unstable paraffin condensate, unstable condensate with low content of paraffins and their mixtures in different ratios.

1 cl, 1 dwg, 1 ex