The device utilization of natural gas from the disconnected sections of the main gas pipeline

 

(57) Abstract:

The invention relates to gas industry. The technical result of the invention is the provision of natural gas recovery from the disconnected sections of the pipeline located to the compressor station, and after it in the direction of gas flow at little cost to the preparatory work. In the proposed device uses low-pressure supercharger, staff supercharger station and staffing pipeline, and the low-pressure suction blower connected with the suction and pressure piping standard blower and pressure - suction pipeline of regular supercharger. 1 Il.

The invention relates to a gas compressor units, transporting gas through pipelines.

Known mobile compressor station (ISS) for pumping natural gas from the disconnected sections of the main pipeline, described in the journal "Gas industry" No. 5, 1998, page 16 and "Mobile unit for pumping gas from the disconnected section of the main pipeline (options)" on patent N 2108489."

Disadvantages technical solutions are the need for sufficient is aproved, the deployment of equipment and connecting it to the gas under pressure. For the deployment and operation of the ISS is also required crane, mobile power station, mobile dwelling unit.

The closest technical solution is "gas Pumping unit of the main gas pipeline".with. 916783.

The disadvantage of this technical solution is the inability to recycle gas from the disconnected areas located outside the compressor station (CS).

The aim of the invention is a device utilizing gas from the disconnected sections of the pipeline located to the COP, and after the COP does not require delivery of equipment for utilization of gas to a location off site.

This goal is achieved by the fact that the low-pressure supercharger, interacting with the standard compressor COP, is connected on the suction with suction and discharge staff of the compressor, and the pressure from the suction pipe standard blower.

The features which are described in the known technical solutions are available compressors and pipelines.

forming and pressure piping standard blower KS, and at head - with the suction pipe of standard supercharger.

The present invention is illustrated in the drawing, which shows a fragment of the pumping KS, containing two branches of the main pipeline, split locking bodies (hereinafter valves 1 and 2 in sections 3 and 4, located to the COP and the sections 5 and 6, located behind the COP on the direction of gas flow, staffing compressor 7 with suction pipes 8 and 9 and the valves 10, 11 and discharge pipes 12 and 13 with valves 14, 15. For pumping gas from the disconnected sections of the pipeline, the device is equipped with a low-pressure compressor 16 with suction piping gas utilization 17, 18 with the valves 19, 20, connected with the suction pipes 8 and 9 staff of the supercharger 7, suction piping gas utilization 21, 22 with the valves 23, 24 connected to the discharge pipes 12 and 13 staff of the compressor 7, the discharge pipeline gas utilization 25 with valve 26 and a crosspiece 27 with valve 28 connected to the suction piping of the regular blower 7.

The gas utilization device provides two stage recycling and works as follows.

The first stage gas utilization ASU staff blower (about 5 MPa). When disposing of gas from the site 3 or 4 on the standard pipe 8 or 9 through the valve 10 or 11 comes to the standard supercharger 7 and is blown by the standard pipeline 12 or 13 through valves 14 or 15 in the working section of the pipeline 5 or 6. When disposing of gas from phase 5 gas by pipeline utilization 21 with valve 23 and the jumper 27 with the valve 28 and the pipe 25 with the valve 26 is supplied to the standard blower 7 and the pipe 13 through the valve 15 is forced into the working section of the pipeline 6. When disposing of gas from section 6 gas in a similar way forced in work area 5.

At the second stage gas utilization of sections 3 or 4 gas pipeline 17 or 18 through valves 19 or 20 is supplied to the low-pressure compressor 16 and the pre-compressed is fed to the standard blower 7 through the pipeline 12 or 13 through valves 14 or 15 pumps the gas in the working section of the pipeline 5 or 6.

When disposing of gas from section 5 of the gas through the pipeline 21 to the valve 23 is supplied to the low-pressure compressor 16 and a pre-compressed is fed to the standard blower 7, which pipe 13 through the valve 15 is pumping gas into the working section of the pipeline 6. When disposing of gas from section 6 gas similar to the motor in series and provides a constant minimum pressure on the suction staff supercharger, equal to about 5 MPa. The residual pressure in the recycling section of the pipeline depends on the type of low-pressure compressor and may be equal to 0.1...1.0 MPa.

As a low-pressure blower can be used or the gas-jet ejector or the compressor volumetric type.

As a staff blowers on the COP used a centrifugal compressor with a compression ratio of about 1.5.

A device for recycling gas is located on CA and provides recycling gas from 2, 3 sections of the pipeline before the constitutional court, and after the COP. The number of sections of the pipeline between the COP is 4-6. Therefore, the device for gas utilization provides its utilization of the entire pipeline.

Device for gas utilization can be made stationary, mounted on each COP or as a mobile, serving several KS. In this case, the COP provides extensions to the standard pipelines for connecting the device for gas utilization.

Due to the fact that the main gas pipeline is a complex set of interconnected pipelines with remotely-controlled equipment, as well as seasonal mode of operation, throughput ability what is the waste gas from gas pipelines, located to the COP, and after the COP on the direction of gas flow without delivery equipment for utilization of gas in the gas pipeline route, and in the absence of a necessary connection on the track under pressure.

The device utilization of natural gas from the disconnected sections of the main pipeline containing low-pressure supercharger, staff supercharger compressor station and pipeline, characterized in that the low-pressure supercharger is connected to the suction with the suction and pressure piping standard blower and pressure - suction pipeline of regular supercharger.

 

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