System for recycling vent natural gas in compressor station

A technology for venting natural gas and compressor stations, which is applied in pipeline systems, gas/liquid distribution and storage, liquid variable capacity machinery, etc. It can solve problems such as inability to pressurize natural gas, lower recovery rate of vented natural gas, and inability to pressurize natural gas , to achieve the effect of increasing the recovery rate

Pending Publication Date: 2020-09-04
PETROCHINA CO LTD
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  • Abstract
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Problems solved by technology

[0005] The reciprocating compressor not only cannot effectively pressurize the natural gas with a low pressure (for example, less than 4 MPa), resulting in a decrease in the recovery rate of the vented natural gas, but also when the amount of vented natural gas is less than the boosting capacity of the reciprocating compressor, the reciprocating compressor Can not effectively pressurize the vented natural gas

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  • System for recycling vent natural gas in compressor station
  • System for recycling vent natural gas in compressor station
  • System for recycling vent natural gas in compressor station

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Embodiment Construction

[0053] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0054] It should be noted that the pipeline compressor A involved in the embodiment of the present invention is installed between the upstream pipeline and the downstream pipeline, and pressurizes the natural gas in the upstream pipeline so that the natural gas in the upstream pipeline can smoothly flow into the downstream pipeline.

[0055] The embodiment of the present invention provides a system for recovering the emptied natural gas of the compressor station, as shown in the attached figure 1 As shown, the system includes: a multi-stage gas dynamic compressor 1, a gas reciprocating compressor 2, and a controller;

[0056]The high-pressure intake end of the first-stage gas dynamic compressor 1a communicates with the outlet end of th...

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Abstract

The invention discloses a system for recycling vent natural gas in a compressor station and belongs to the technical field of natural gas recycling. The system comprises a multilevel gas power compressor, a gas reciprocating compressor and a controller. According to the coordination of the multilevel gas power compressor and the gas reciprocating compressor, the controller is utilized to control the opening and closing of a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve and a seventh electromagnetic valve based on a detection result transferred by a first pressure transducer, a second pressure transducer, and a third pressure transducer. Gas of differentpressure and different capacity discharged from a vent end of a pipeline compressor can be effectively supercharged in time so that the supercharged pressure can reach the requirement of predetermined recoverable pressure, and the recovery rate of vent natural gas in the compressor station is improved.

Description

technical field [0001] The invention relates to the technical field of natural gas recovery, in particular to a system for recovering emptied natural gas in a compressor station. Background technique [0002] During the service of long-distance natural gas pipelines, it is necessary to regularly vent the natural gas in the pipeline compressors for maintenance. In order to avoid the waste of vented natural gas and the environmental pollution caused by discharge into the atmosphere, it is necessary to recover the vented natural gas. Wherein, the pipeline compressor is provided with an inlet end connected with the upstream pipeline, an air outlet end connected with the downstream pipeline, and a venting end. [0003] Currently, pressurization loopback is performed by having a reciprocating compressor between the vent end and the intake end of the in-line compressor. [0004] The inventor finds that the prior art has at least the following problems: [0005] The reciprocating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D1/02F17D3/01F04B41/06F04B49/00F04B49/06F04B49/22F04F5/16
CPCF04B41/06F04B49/007F04B49/06F04B49/22F04F5/16F17D1/02F17D3/01
Inventor 李毅贾彦杰周代军梁俊张霄
Owner PETROCHINA CO LTD
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