RU-2861294-C1 - INSTALLATION FOR DEGASSING UNSTABLE GAS CONDENSATE

Abstract

FIELD: oil and gas refining industry. SUBSTANCE: present invention is intended for stabilising gas condensate in order to extract hydrocarbon components whose presence adversely affects the transport of unstable condensate due to desorption of light hydrocarbon gases. An installation for degassing unstable gas condensate is proposed, comprising a multi-stage degassing unit consisting of series-connected sections of ultrasonic channel degassers with power supplies, a heat exchanger, a heating unit with a power regulator, a separated gas extraction unit with a discharge line, a regulating mixing valve with an actuator and a control unit. EFFECT: optimisation of the installation operation. 1 cl, 1 tbl, 2 dwg

Inventors

• Dengaev Aleksej Viktorovich
• Igrevskij Leonid Vitalevich
• Marakov Denis Aleksandrovich
• SARGIN BORIS VIKTOROVICH

Dates

Publication Date

20260504

Application Date

20251014

Claims (1)

1. An installation for degassing unstable gas condensate, characterized in that it contains a multi-stage degassing unit consisting of series-connected sections of ultrasonic channel degassers with power units, a heat exchanger, a heating unit with a power regulator, a separated gas sampling unit with an outlet line, a regulating mixing valve with a drive and a control unit, wherein the inlet of the heat exchanger is connected to the unstable condensate supply line, and the outlet to the heating unit connected to the inlet of the degassing unit, on the outlet line of which a regulating valve is installed, connected via the outlet to the target stable condensate outlet line and via the cooled condensate return line to the heat exchanger, the outlet line of the degassing unit is connected to the heated condensate supply line to the heat exchanger, the first phase gas sampling line from the heating unit and the outlets of the degassers for the second phase gas are connected to the separated gas sampling unit, wherein on the lines for feeding unstable condensate to the heating unit, the degassing unit and on Temperature sensors are installed in the stable condensate outlet lines before and after the control valve, connected to the input of the control unit, the output of which is connected to the drive of the control mixing valve, to the power regulator of the heating unit and to the power supplies of the ultrasonic emitters of the channel degassers.

Description

The invention relates to the field of oil and gas refining industry and is intended for stabilizing gas condensate for the purpose of extracting hydrocarbon components, the presence of which negatively affects the transportation of unstable condensate due to the desorption of light hydrocarbon gases. A gas condensate stabilization unit is known, consisting of degassing units, condensate heaters, a gas separator and a stabilization column (see Zhagfarov F.G., Grigorieva N.A., Veretin M.S. Method for optimizing the gas condensate stabilization process in the case of “weighting” of hydrocarbon feedstock, Oil and Gas Chemistry Journal, 1, 2024, pp. 27-34). The high-temperature condensate stabilization used in the known device ensures insufficiently high quality of stable condensate due to the loss of some heavy fractions and due to a lower yield of light fractions, and also requires high energy consumption for heating the raw material. Also known is a gas condensate stabilization unit, which includes a preheating heat exchanger, a still tank with a built-in heat exchanger, a thermoelectric heater and an ultrasonic radiation source, a cap rectification column with a dephlegmator connected by a slurry pipe to a fuel collector heat exchanger, a still residue cooler, and a built-in heat exchanger with a burner (RU 25507, 2002). This unit is designed for processing gas condensate containing hydrocarbons C5 and higher, and is not effective in stabilizing unstable gas condensate containing hydrocarbons such as methane, ethane, propane, butane, which would be lost when using a known unit. Of the known technical solutions, the closest in technical essence and the achieved result is an installation for stabilizing unstable gas condensate, including a distillation column equipped in the bottom section with an ultrasonic radiation source, a line for feeding unstable gas condensate, wherein the line for feeding unstable gas condensate is connected to the middle and upper and/or bottom sections of the distillation column, or is connected to the upper, middle and through a furnace with the bottom sections of the distillation column, or is connected, at least, to the upper or middle sections of the distillation column and through at least one recuperative heat exchanger and a furnace with the bottom section of the distillation column (RU 102535, 2010). The well-known technical solution is more energy-efficient, simpler, safer and ensures the production of higher quality stable condensate than high-temperature stabilization. The disadvantages of the described solution include: low process efficiency due to the installation of emitters outside the stabilization column housings with a large wall thickness and due to the less efficient design of the stabilization column flow path in terms of acoustic wave propagation, a high risk of paraffin deposition, a long time spent on the stabilization process, an insufficiently high yield of light fractions, and high economic costs for the construction of the unit. The technical problem solved by the present invention is to improve the quality of stabilized condensate by obtaining condensate with a given saturated vapor pressure (SVP), reducing the process time, decreasing the maximum heating temperature and metal consumption, ensuring the mobility of the installation and reducing economic costs. The stated problem is solved in that the installation for degassing unstable gas condensate contains a multi-stage degassing unit consisting of series-connected sections of ultrasonic channel degassers with power units, a heat exchanger, a heating unit with a power regulator, a separated gas sampling unit with an outlet line, a regulating mixing valve with a drive and a control unit, wherein the inlet of the heat exchanger is connected to the unstable condensate supply line, and the outlet to the heating unit connected to the inlet of the degassing unit, on the outlet line of which a regulating valve is installed, connected via the outlet to the target stable condensate outlet line and via the cooled condensate return line to the heat exchanger, the outlet line of the degassing unit is connected to the heated condensate supply line to the heat exchanger, the first phase gas sampling line from the heating unit and the outlets of the degassers for the second phase gas are connected to the separated gas sampling unit, and on the lines supplying unstable condensate to the heating unit, the degassing unit and Temperature sensors are installed on the stable condensate outlet lines before and after the control valve, connected to the input of the control unit, the output of which is connected to the drive of the control mixing valve, to the power regulator of the heating unit and to the power supplies of the ultrasonic channel degassers. The achieved technical result consists in optimizing the operation of the unit by combining the thermal method and ultrasonic action, ensuring the flexibility and adaptab