RU44367U1 - INSTALLATION FOR PREPARATION OF ASSOCIATED OIL OR NATURAL GAS FOR GAS PIPELINE TRANSPORT - Google Patents

Abstract

Usage: preparation of gas to move through the pipeline. Task: increasing the degree of gas purification from condensate-forming fractions. An installation for preparing associated petroleum or natural gas for transport through a gas pipeline contains a receiving gas line 1, through which an initial associated petroleum or natural gas enters the installation, a device 2 for increasing or decreasing gas pressure (compressor or vacuum pump), a flow gas line 3, whereby associated petroleum or natural gas, first 4 and second 5 vortex tubes, first 6 and second 7 separators, ezh Ktorov 8 and condensate accumulator 9. In 4 ₁ of the first pipe 4 through the swirl device 2 is connected to the reception line of the gas outlet 5 and 2 ₂ of the second cold flow vortex tube 5. Yield ₂ 4 of the first cold flow vortex tube 4 is connected to flowline gas line 3 via control valve V1 and with the inlet of the cooling chamber 4 ₄ through the control valve V2. Moreover, the cold flow pipeline 4 ₂ is made in the form of a combination of telescopic pipe elements, with which methane or other gas components necessary for various kinds of technical equipment are selected. The output of the cooling chamber 4 _{4 is} connected to the input of the cooling chamber 5 ₄ , the output of which is connected to the flow gas line 3. 1 nez. P. f-ly, 1 ill.

Description

The technical field to which the utility model relates.

The utility model relates to methods of moving gas through a gas pipeline and can be used in the oil, chemical, gas, oil refining, gas processing industries for the purification of oil and natural gases from condensate of heavy hydrocarbons (C ₅ -C ₁₅ ) and impurities with the release of light fractions (C ₁ -C ₄ ) at the initial stage of gas production and its preparation for transportation through the gas pipeline.

State of the art

A known installation for compressing and transporting oil gas, including a device for increasing gas pressure (compressor), a receiving and flow line, a gas bypass line connected to the discharge line of the compressor, shut-off elements, and the installation is combined with the oil and gas pipeline of the oil separation device connected by a gas pipeline to the receiving compressor line, and the other with a gas bypass line and an oil and gas pipeline, and the shut-off elements installed on the additional gas pipeline are connected through a regulator with pressure sensors of the compressor suction line (USSR Author's Certificate №1735658, cl. F 17 D 1/07, 1992).

Signs of the known device, which coincides with the features of the claimed technical solution, are the availability of a device for increasing the gas pressure (compressor), receiving and flow lines, as well as locking elements.

The reason that prevents obtaining a technical result, which is provided by the claimed technical solution, is that the separation of heavy hydrocarbons from oil gas is carried out due to mass transfer processes of gas and gas-liquid flows in the receiving oil and gas pipeline.

The closest analogue (prototype) is an installation for the preparation of oil or natural gas in transport through a gas pipeline, including a device for increasing or decreasing gas pressure, a receiving and flow gas line, a vortex tube containing a scroll and a cold flow pipeline connected to it, and at least one a hot flow pipeline, a cooling chamber, in which a hot flow pipeline is enclosed, as well as a condensation unit connected by its inlet to the outlet of the hot flow pipeline, by one outlet m - with the condensate outlet of the installation, and its other outlet - with a cooling chamber, while the outlet of the cold flow pipe is connected to the discharge gas line, the inlet of the cooling chamber is connected to the receiving gas line, the outlet of the cooling chamber is connected to the inlet of the device to increase or decrease the gas pressure the output of which is connected to the entrance of the vortex tube (Patent RU No. 2181459 C1, CL F 17 D 1/02, publication date: 2002.04.20).

Signs of the known device that match the features of the claimed technical solution, are the availability of a device for increasing or decreasing the gas pressure, receiving and flow gas lines, a vortex tube, made with the possibility

forced cooling of its working area and separator (condensation unit).

The reason that prevents the obtaining of a technical result, which is provided by the claimed technical solutions, is that the separation of heavy hydrocarbon fractions is carried out under conditions of increased working pressure and increased concentration of heavy hydrocarbons, which reduces the efficiency of the desired separation of the gas stream in the vortex tube.

Utility Model Disclosure

The problem to which the claimed technical solution is directed is to increase the degree of gas purification from condensate-forming fractions.

The technical result, which mediates the solution of this problem, consists in applying the reduced operating pressure mode at the second stage of gas purification (second vortex tube) and the reduced temperature and heavy hydrocarbon concentration regimes in the gas stream entering the inlet of the first (main) vortex tube.

The technical result is achieved by the fact that the installation for the preparation of associated petroleum or natural gas for transport through a gas pipeline contains a device for increasing or decreasing the pressure, a receiving gas line through which the source associated petroleum or natural gas enters the installation, a flow gas line through which from the installation associated gas, purified from heavy fractions of hydrocarbons, associated petroleum or natural gas, two vortex tubes, made with the possibility of forced cooling their working areas, two separators, an ejector and a condensate tank, while the input

the first vortex tube through a device for increasing or decreasing the pressure is connected to the receiving gas line and the output of the cold stream of the second vortex pipe, the output of the cold stream of the first vortex work is connected to the discharge gas line, the output of the hot stream of the first vortex tube through the ejector in which this stream is the working body, connected to the inlet of the first separator, the condensate output of which is connected to the condensate accumulator, and the gas outlet to the inlet of the second vortex tube, the cold stream output of the second vortex tube connected to the said receiving gas line for the possibility of combining this cold stream with the original associated petroleum or natural gas to supply the stream thus combined to the inlet of the first vortex tube, the outlet of the hot stream of the second vortex tube is connected to the inlet of the second separator, the condensate outlet of which is connected to the storage condensate, and the gas outlet through the said ejector is connected to the inlet of the first separator.

New features of the claimed technical solution are that the installation contains a second vortex tube, a second separator, an ejector, while the entrance of the first vortex tube through a device for increasing or decreasing the pressure is connected to the receiving gas line and the output of the cold stream of the second vortex pipe, the output of the hot stream the first vortex tube through the ejector, in which the flow is a working fluid, connected to the input of the first separator, the condensate output of which is connected to the condensate storage, and the gas output to the input by the second vortex tube, the cold stream output of the second vortex pipe is connected to the said receiving gas line to be able to combine this cold stream with the original associated petroleum or natural gas to supply the thus combined stream to the inlet of the first vortex

pipes, the outlet of the hot stream of the second vortex tube is connected to the inlet of the second separator, the condensate outlet of which is connected to the condensate accumulator, and the gas outlet through the said ejector is connected to the inlet of the first separator.

Brief Description of the Drawings

In FIG. shows a functional diagram of an installation for the preparation of associated petroleum or natural gas for transport through a gas pipeline

Utility Model Implementation

An installation for preparing associated petroleum or natural gas for transport through a gas pipeline contains a receiving gas line 1 through which the source of associated petroleum or natural gas enters the installation, a device 2 for increasing or decreasing gas pressure (compressor or vacuum pump), a flow gas line 3, whereby associated petroleum or natural gas, first 4 and second 5 vortex tubes, first 6 and second 7 separators, ezh Ktorov 8 and 9, condensate accumulator.

The first vortex tube 4 includes a scroll 4 ₁ , which is the inlet of this vortex tube, a cold stream conduit 4 ₂ that is the outlet of the cold stream of this vortex tube, a hot flow conduit 4 ₃ , which is the outlet of the hot stream of this vortex tube, and a cooling chamber 4 ₄ , inside which is located the pipeline 4 ₃ , equipped with ribs to increase the area of heat transfer.

The second vortex tube 5 includes a scroll 5 ₁ , which is the inlet of this vortex tube, a cold flow conduit 5 ₂ that is the outlet of the cold flow of this vortex tube, a hot flow conduit 5 ₃ , which is the outlet of the hot flow of this vortex tube, and a cooling chamber 5 ₄ , inside which is located the pipeline 5 ₃ , equipped with ribs to increase the area of heat transfer.

The inlet 4 _{1 of the} first vortex tube 4 through the device 2 for increasing or decreasing the pressure is connected with the receiving gas line 2 and the outlet 5 _{2 of the} cold stream of the second vortex tube 5. The outlet 4 _{2 of the} cold stream of the first vortex tube 4 is connected to the discharge gas line 3 through the control valve V1 and with the inlet of the cooling chamber 4 ₄ through the control valve V2. Moreover, the cold flow pipeline 4 ₂ is made in the form of a combination of telescopic pipe elements, with which methane or other gas components necessary for various kinds of technical equipment are selected.

The output of the cooling chamber 4 _{4 is} connected to the input of the cooling chamber 5 ₄ , the output of which is connected to the flow gas line 3.

The output of the hot stream 4 _{3 of the} first vortex tube 4 through the ejector 8, in which this stream is a working fluid, is connected to the input of the first separator 6. The condensate output 6 _{1 is} connected to the condensate storage 9 through the condensate of the first separator 6. The gas outlet 6 ₂ of the first separator 6 is connected to the inlet 5 _{1 of the} second vortex tube 5.

The outlet 5 _{2 of the} cold stream of the second vortex tube 5 is connected to the said receiving gas line 2 to be able to combine this cold stream with the original associated petroleum or natural gas to supply the thus combined stream to the inlet 4 _{1 of the} first vortex tube. Output 5 ₃ hot stream second vortex

the pipe 5 is connected to the inlet of the second separator 7, the condensate outlet 7 _of which is connected to the condensate storage 9, and the gas outlet 7 ₂ through the said ejector 8 is connected to the inlet of the first separator 6.

The operation of the installation is as follows.

Oil (or natural) gas from a gas source (not shown) through a receiving line 1 enters the inlet of device 2 to increase or decrease the pressure, where it is mixed with purified gas coming from the exit 5 _{2 of the} second vortex tube 5, and then the mixture with the necessary pressure enters the inlet 4 _{1 of the} first vortex tube 4.

In the vortex tube 4, the gas undergoes primary vortex separation into a cold stream of the first stage and a hot stream of the first stage.

The cold stream of the first stage (pipeline 4 ₂ ) contains a percentage of more light fractions and has a relatively low temperature, as a result of which it is suitable for further transportation through the gas pipeline to the consumer through the flow line 3 and for controlled cooling of the pipes 4 ₃ and 5 _{3 of the} mentioned vortex tubes . Preliminarily, methane (or other gas) is taken from this stream using telescopic pipe elements (not shown) built into the pipeline 4 ₂ . Further, the specified cold stream by means of control valves V1 and V2 is divided into two streams: the first stream through valve V1 enters directly to the flow line 3, and the second stream through valve V2 passes sequentially through the cooling chamber 4 ₄ and 5 ₄ , where it performs the function of cooling medium, and connecting further with the aforementioned first stream, enters with the flow in the flow line 3. Passing through these chambers with a flow rate determined by the ratio of the passage sections of the valves V1 and V2, cold

the stream cools the pipelines of the hot stream of vortex tubes so as to exclude the influence of the gas flow of the first stage on the gas temperature at the inlet of the second vortex tube. This is necessary so that the source gas entering the inlet of the second vortex tube ensures that the minimum component T · ΔS ^R is minimally low (where ΔS ^R is the entropy component, T is the gas temperature at the inlet of the second vortex tube).

The hot stream of the first stage (pipeline 4 ₃ ) contains a percentage of more heavy fractions and impurities that are most convenient for condensing in the separator 6. This stream through the ejector 8, in which it (the stream) is the working fluid, enters the first separator 6, where condensate is extracted from it. The condensate thus formed from the output 6 _{1 of the} separator 6 enters the accumulator 9.

The remaining part of the gas of this first-stage hot stream remaining after this condensation is fed to the inlet 5 _{1 of the} second vortex tube 5, where it is subjected to secondary vortex separation into a cold stream of the second stage (pipeline 5 ₂ ), which contains mainly light fractions of hydrocarbons, and a hot stream of the second stage (pipeline 5 ₃ ) containing predominantly heavy fractions of hydrocarbons.

The hot stream of the second stage (pipeline 5 ₃ ) with a relatively high concentration of droplet-forming fractions enters the second separator 7, where condensate is extracted from it. This condensate from the outlet 7 _{1 of the} separator 7 enters the accumulator 9. The remaining part of the gas of the above-mentioned hot stream of the second stage remaining from this condensate discharge from the outlet 7 _{2 of the} second separator 7 enters the inlet of the ejector 8, where this part is mixed with hot

the flow of the first stage, and the mixture thus formed is fed to the input of the first separator 6.

Thus, the feature of the claimed technical solution is that the gas preparation process is divided into two stages. The first stage (vortex tube 4 and separator 6) ensures maximum gas purification from condensate-forming fractions with simultaneous partial condensate separation and methane emission in the required volume for technological applications, making gas suitable for transport through a gas pipeline. At the same time, the first stage provides the technological conditions of the second stage. In turn, the second stage (vortex tube 5 and separator 7) performs a deep separation of the condensate and forms a quality recovery volume of gas, which ensures effective quality and technological conditions of the first stage. In this case, the operation mode of the installation is determined by the cooling conditions of the pipelines 4 ₃ and 5 _{3 of the} hot vortex tube flows and the pressure difference of the inlet and outlet gas flows. The latter, in turn, determines the energy-saving nature of the gas treatment technology implemented by the claimed installation.

Claims (2)

1. Installation for the preparation of associated petroleum or natural gas for transport through a gas pipeline, comprising a device for increasing or decreasing pressure, a receiving gas line through which the source of associated petroleum or natural gas enters the installation, a flow gas line through which from the installation to the gas pipeline further transport comes associated oil or natural gas, purified from heavy fractions of hydrocarbons, two vortex tubes, an ejector and a condensate accumulator, while the entrance of the first vortex tube through the device in order to increase or decrease pressure, it is connected with the receiving gas line and the output of the cold stream of the second vortex tube, the output of the cold stream of the first vortex tube is connected to the discharge gas line, the output of the hot stream of the first vortex tube through an ejector in which this stream is a working fluid is connected to the inlet of the first separator, the condensate outlet of which is connected to the condensate accumulator, and the gas outlet is connected to the inlet of the second vortex tube, the cold stream output of the second vortex tube is connected to the said gas inlet the second line for the possibility of combining this cold stream with the original associated petroleum or natural gas to supply the stream thus combined to the inlet of the first vortex tube, the outlet of the hot stream of the second vortex tube is connected to the inlet of the second separator, the condensate outlet of which is connected to the condensate storage, and the outlet gas through the said ejector is connected to the inlet of the first separator. 2. The installation according to claim 1, characterized in that it is equipped with two cooling chambers, in which the corresponding pipelines of the hot flow of the corresponding vortex tubes are located, while the cooling medium in both chambers is the cold stream of the first vortex tube supplied to these chambers with the possibility of regulation its expense.