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Automatic cut-off condition identification method for valve chamber containing compressor gas transmission main line

An automatic cut-off and identification method technology, which is applied in the direction of mechanical equipment, gas/liquid distribution and storage, complex mathematical operations, etc., can solve the problem that there is no improvement in the shut-off identification conditions of the cut-off valve in the gas transmission trunk line of the compressor, so as to reduce the error The effect of judging probability, reducing misjudgment, and reducing false shutdown

Pending Publication Date: 2022-03-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the existing technology, there is no idea of ​​improving the shut-off identification conditions of the shut-off valve of the gas transmission trunk line containing the compressor

Method used

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  • Automatic cut-off condition identification method for valve chamber containing compressor gas transmission main line
  • Automatic cut-off condition identification method for valve chamber containing compressor gas transmission main line
  • Automatic cut-off condition identification method for valve chamber containing compressor gas transmission main line

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Experimental program
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Effect test

Embodiment 1

[0035] Such as Figure 1 to Figure 5 As shown, the present invention discloses a method for identifying the automatic cut-off condition of the valve chamber of the gas transmission trunk line containing the compressor, which includes the following steps:

[0036] Step S1: Collect data of each valve chamber on the main gas transmission line in real time; the data includes gas pressure, gas delivery volume and gas composition data in the pipeline at each valve chamber.

[0037] Step S2: Calculate the pressure drop rate data of each valve chamber in real time according to the data; the calculation formula of the pressure drop rate is:

[0038]

[0039] Where: V i is the pressure drop rate, T i is the i-th time node when the data is collected, P i for at time T i The valve chamber pressure collected at the time.

[0040] Step S3: Draw the pressure drop rate-time trend graph of each valve chamber in real time according to the pressure drop rate data;

[0041] Step S4, acco...

Embodiment 2

[0045] This embodiment is based on Embodiment 1, and the data is collected and calculated by an automatic control system. The automatic control system is also connected with a display screen for displaying the pressure drop rate-time trend graph. The automatic control system includes a plurality of execution modules, the plurality of execution modules are respectively arranged in the valve chamber and / or the station, and the execution modules are used to close the pipeline.

[0046] The data is collected and calculated by the automatic control system, which can make the collection process and calculation process faster and more accurate. The display screen can display the pressure drop rate-time trend graph in real time, which is convenient for the on-duty personnel to observe and monitor in real time, and can be timely when the pipeline leaks. Respond to avoid greater losses due to time delays. The execution module can directly act on the pipelines in the valve chamber and / o...

Embodiment 3

[0049] In this embodiment, on the basis of Embodiment 1 and Embodiment 2, as a specific calculation example, a gas transmission trunk line in a certain area is taken as an example. The gas transmission trunk line includes two gas transmission stations and two shut-off valves There is a compressor in the station 2, and each station and valve room is equipped with a pipeline shut-off valve. The structural diagram of the main gas transmission line can be referred to figure 2 . The diameter of the pipeline is 813×14.2mm, the design pressure is 10MPa, and the transmission medium of the pipeline is the same purified natural gas, which does not contain H 2 S, with a small amount of CO 2 . Now according to the method of the present invention, it is judged whether each shut-off valve of the pipeline needs to be shut off, and the implementation steps are as follows:

[0050] Step 1, collect the real-time pressure, delivery volume, and natural gas composition data of each valve chamb...

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Abstract

The invention discloses a method for identifying automatic cut-off conditions of a valve chamber of a gas transmission trunk line containing a compressor, and relates to the technical field of oil and gas pipelines, comprising the following steps: collecting data of each valve chamber on the gas transmission trunk line in real time; pressure drop rate data of each valve chamber at each moment are calculated in real time through data; drawing a pressure drop rate-time trend chart of each valve chamber in real time according to the pressure drop rate data; according to the pressure drop rate-time trend chart, the operation working conditions of pipelines between the valve chambers are judged; the operation working conditions comprise a normal working condition, a compressor suction working condition and a leakage working condition. Data of gas pipeline pressure, gas transmission amount and gas composition are collected, the pressure drop rate of each valve chamber is calculated through the data, and the pipeline is divided into three working conditions from the pressure drop rate, namely a normal working condition, a compressor suction working condition and a leakage working condition. On one hand, misjudgment of leakage caused by working of the compressor can be avoided, and on the other hand, the leaked pipeline can be accurately positioned and the corresponding valve chamber can be closed in time when the pipeline leaks.

Description

technical field [0001] The present invention relates to the technical field of oil and gas pipelines, and more specifically, to the technical field of a method for identifying automatic cut-off conditions of a valve chamber of a gas transmission main line containing a compressor. Background technique [0002] In the natural gas pipeline industry, gas pipeline leaks occur from time to time, and natural gas leaks have the characteristics of being difficult to detect, spreading quickly, and potentially harmful. It is the key to reduce the consequences of gas pipeline leakage accidents to detect and take corresponding measures in time after pipeline leakage occurs. Therefore, for the main gas transmission line, multiple cut-off valve chambers are usually arranged on the pipeline at a certain distance to divide the main gas transmission line into multiple sections to reduce the loss of pipeline accidents and facilitate management. Usually, the method of monitoring pipeline leaka...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D5/00F17D5/02G06F17/10G06F17/11
CPCF17D5/005F17D5/02G06F17/10G06F17/11
Inventor 汤丁蒋华全雷思罗谢云杰杨颖陈家文王岩任科禹贵成廖浩然胡滨涛周俊池唐德许捷周明兵易美顺
Owner PETROCHINA CO LTD
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