SU303485A1 - METHOD OF TREATING A GAS MIXTURE BY A WAY OF LOW-TEMPERATURE SEPARATION - Google Patents

Description

The invention relates to methods for the production and use of gas mixtures, and specifically to the processing of gas mixtures before their further processing, such as cleaning and drying the gas before it is separated.

The known method of preparing the gas mixture; further processing, including gas drying through low-temperature separation. According to a known method, the initial gas mixture is cooled (by heat exchange and throttling of the gas stream) to the temperature required for the formation of hydrates, and the separated hydrates are decomposed and separated from the gas stream.

It is known that hydrates include gas smegma, such as methane, ethane, hydrogen sulfide, etc., which are removed: when hydrates are released from the gas mixture.

The aim of the invention is to increase the recovery of harmful oils, for example hydrogen sulfide, through the use of the moisture absorption capacity of these components. This goal is achieved by adding additional water to the cooled gas flow, which increases the degree of hydrate formation, and the resulting hydrates decompose when they are removed-From-g over.

hydrogen from natural hydrocarbon gases.

Gas from a well with temperature and pressure exceeding hydrate formation conditions (for example, for hydrogen sulfide, a temperature of 29.5 ° C and a pressure of 80-90 atm) is directed through the pipeline / 3 separator 2 of the first stage, and from there through pipeline 3 - In the heat exchanger 4, where it is cooled to a temperature, to the cr5 of the heat exchanger 4, the gas is fed to an apparatus 5, for example, of the jet type, in which the throttling air: 1e of the gas flow occurs and is cooled to a temperature below the critical one, at which intensive hydrate formation occurs. Then the gas stream with hydrates is introduced into the separator 6 of the second stage, from which the precipitated hydrates are driven by means of the setup RCA 7 with the electric motor 8 and 3 separating e part of 5. From the tank 5 obtained during decomposition: -; and 1; water is discharged through conduit W, and condensate is conveyed through conduit 11 to storage.

Hydrogen sulfide with possible impurities of methane or ethane is removed through pipe 10 to collect and transport it. The purified, cold gas is discharged through line 13 to the collector. A portion of this flow through the regulator link M arrives in quality. passive lotol n jet apparatus, / 5. For deeper r-sources of gas from

hydrogen sulfide into the gas tray through the jet apparatus 15 water is added.

It is possible to inject through the jet apparatus into the gas flow of the metapolar from the reservoir 9, if the separation is carried out for the purpose of drying and gas stripping. Switching of connecting pipelines is carried out by valves 16, 17, 18, and pressure control by pressure regulators 19 and 20.

In the case of adhesion of hydrates to the walls of the apparatus, where the pelvis pelvic is small, an ultrasonic generator 2 / is installed.

Subject and z obre te n s

The method of treating the gas mixture with low-temperature separation by steam, including cooling the gas mixture to the temperature of hydrate formation and separating the hydrates formed from the gas trap, characterized in that, in order to increase the degree of extraction from the gas mixture, hydrogen sulfide, in the cooled the gas flow is added to the zod, and the crystalline hydrates do not decompose.

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