HYDROCARBON FRACTIONS STABILISATION METHOD Russian patent published in 2014 - IPC B01D3/14 C07C7/00 

FIELD: oil and gas industry.

SUBSTANCE: method includes delivery of heated non-stable hydrocarbon fraction into the middle part of the stabiliser, which top is cooled and the bottom is heated, output of vapours from the top and output of the stable hydrocarbon fraction from the stabiliser bottom. A fractionating unit with falling film that includes the upper and lower sections of heat-mass-exchange elements and the feed zone placed between them is used as the stabiliser. The heat-mass-exchange elements comprise shaped vertical surfaces, which form inner space for passage of heat carrier or cooling agent and outer space for counterflow of liquid and vapour. The lower unit is heated by feeding of the heated non-stable hydrocarbon fraction as heat carrier to the bottom part of the heat-mass-exchange elements in the lower section; the fraction is outputted up to the unit top, constricted up to stabilisation pressure and feed to the feed zone. The upper part of the unit is cooled by feeding of the coolant to the top part in the inner space of the heat-mass-exchange elements in the upper section; the coolant is outputted from its bottom part. The stabilising gas is outputted from the top of the fractionating unit as stabilisation vapours.

EFFECT: reducing steel intensity, excluding costs of electric energy, decreasing energy costs.

1 dwg, 1 ex