OIL PREPARATION METHOD AND DESORPTION COLUMN FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC B01D19/00 B01D53/52 B01D17/05 C10G33/04 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, and in particular to methods and devices for the preparation of oil during degassing, dehydration and desalting. The invention relates to a method for oil preparation, including oil purification in at least two inlet stages of separation from mechanical impurities and free water and gas, water withdrawal from a settling tank and subsequent pumping of purified oil by a raw pump through a line heater for heating above 60°C, but not higher than the boiling point of light fractions of oil, through at least two stages of dehydration and desalting of oil with the supply of fresh wash water between them, subsequent supply to the desorption column with gas purge and supply of reagents, and then through the outlet separator and tank of commercial oil, wherein, mechanical impurities, water and gas from separators and tanks are diverted to collection and /or disposal systems. After the first separation stage, the oil is heated to a temperature of 20-35°C by a heat exchanger by pumping hot oil through it after the second stage of desalination and dehydration in front of the desorption column, into the body of which a gas conduit coaxial to the body is inserted with paired radial nozzles arranged in a spiral evenly along the perimeter and the entire length of the gas pipeline, and all nozzles are equipped with nozzles directed against the direction of the oil flow in the casing, ensuring uniform saturation of it with gas along the entire length and perimeter of the desorption column casing, while oil with fresh washing water is pumped before being fed into the second stage of dehydration and desalting of oil through a coil with a total length that ensures maximum dissolution of salts in fresh water. Reagents are fed between the desorption column and the outlet separator, followed by the desorption column with a gas purge, followed by the supply of reagents, and subsequent supply through the outlet separator and the tank of commercial oil.

EFFECT: expansion of the field of application, effective destruction of the water-oil emulsion, reduction in the need for a large amount of reagents to obtain the required degree of oil purification.

3 cl, 3 dwg