DISTILLATE PRODUCTION METHOD Russian patent published in 2017 - IPC C10G7/00 E21B43/34 

FIELD: oil and gas industry.

SUBSTANCE: distillate production method comprises separation of the product into fractions in a distillation column, delivery of broad fraction of light hydrocarbons from the rectification column to the heat exchanger, cooling to a temperature sufficient for condensastion, separation, redelivery of the broad fraction of light hydrocarbon part to the top part of the distillation column, delivery of the rest to the warehouse, the method is characterized in that the broad fraction of hydrocarbons is delivered from the distillation column to a small additional distillation column, wherein liquid hydrocarbons are separated from gaseous hydrocarbons, obtaining distillate. Then the distillate is heated in the evaporator and delivered back to the small additional distillation column to mass-transfer zone of liquid and gaseous hydrocarbons, wherein the liquid hydrocarbon fraction is weighted by further separation of the gaseous hydrocarbons and low-boiling liquid hydrocarbons, while accumulating the weighted distillate in the small additional distillation column, the balance amount of distillate is delivered to cooling in the heat exchanger, water and gas are separated from the distillate in a buffer-separation tank and the distillate is delivered to an accumulation tank where gas is separated, distillate is accumulated and subsequently delivered to the consumer. Gaseous hydrocarbons from the top of the small additional distillation column, buffer-separation tank and accumulation tank are delivered to the gas-collecting system, while the low-boiling liquid hydrocarbons from the small additional distillation column are fed to the still-head pipe of the distillation column and included to the technological condensation process of the broad fraction of light hydrocarbons.

EFFECT: increased output of the high density distillate.

1 dwg, 1 ex