METHOD FOR DECREASING THE PRODUCTION OF SECONDARY HYDROGEN SULPHATE IN OIL PREPARATION AND THE DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2018 - IPC C10G27/00 C10G31/06 C10G7/00 B01J10/00 

FIELD: oil industry.

SUBSTANCE: invention relates to the field of oil treatment, namely, technological schemes, providing a reduction in saturated vapor pressure and oil purification from hydrogen sulphide by physical methods. Invention can be used in the oil and gas production industry directly in the processes of primary oil treatment as part of complex oil treatment units (COTU) in the preparation of hydrogen sulfide-containing oils and gas condensates with a high content of hydrogen sulphide and other gases. Invention uses the principle of a method for preparing oil (soft residue) with the accumulation of water and light fractions in a cube of a column equipped with an AVR nozzle, without the use of a reboiler, the proposed complex can also replace the end separator of a typical unit for complex oil treatment (COTU). As a desorption agent, water vapor is used in a mixture with light fractions C₃÷C₅, which repeatedly turn into steam and condense inside a column equipped with an AVR nozzle, but here instead of a reboiler, the oil is heated directly in the tube furnace, only the heating mode is selected in such a way that the oil temperature does not rise to the limits at which the content of hydrogen sulphide in the prepared oil exceeds 100 ppm, and then in the separator, it is divided into two streams, one of which is returned in vapor form to the column with the nozzle AVR, where the pairs counterflow to the feed oil up the column, heating up the flow of oil. Method, like the analogs mentioned, relates to the oil separating stage. For realization of the method, as a final stage, a column equipped with an AVR packing is installed, in combination with a heating furnace and a separator, the separator being connected through a vapor stream to the column.

EFFECT: technical problem solved by the present invention is to expand the possibilities of using tubular furnaces for heating and maintaining pressure in a column with a minimum formation of secondary hydrogen sulphide in the heated oil passing through the tube coil of the furnace.

2 cl, 1 dwg, 1 tbl