Online real-time detection method for gas-transmission-pipe water dew points

Abstract

The invention discloses an online real-time detection method for gas-transmission-pipe water dew points. The method includes the steps that 1, all valves on a gas-transmission-pipe-water-dew-point online real-time detection device are adjusted to be in a closed state; 2, a water-dew-point analysis meter is started, and the detecting parameters of the water-dew-point analysis meter are set; 3, an outlet pressure value of the adjusting valve is set; 4, the first stop valve and the fourth stop valve are adjusted to be in a full open state, and then the second stop valve is slowly opened; 5, the first flow control valve is opened, and the second flow control valve is adjusted, and the flow of gas flowing through the water-dew-point analysis meter is located in a requirement range of the water-dew-point analysis meter; 6, gas is detected by the water-dew-point analysis meter, and a detection result is transmitted to a control system. The online real-time detection method for the gas-transmission-pipe water dew points has the advantages that an automatic online detection function of gas-transmission-pipe-water-dew-point gas components is achieved; the detection timeliness and accuracy ofthe pipe water dew points are improved, the running safety of a pipe and equipment is guaranteed, and staff loads are reduced.

Description

technical field [0001] The invention relates to the technical field of natural gas detection, in particular to an online real-time detection method for water dew point of a gas transmission pipeline. Background technique [0002] In the process of long-distance natural gas pipeline transportation, changes in temperature and pressure will lead to changes in the dew point of natural gas water. When the critical point is exceeded, liquid water will be precipitated, causing corrosion damage to equipment such as pipelines and compressors. Therefore, real-time monitoring of natural gas water dew point is particularly important. In the past, the water dew point detection of pipeline natural gas was generally carried out offline detection in the laboratory after sampling gas from the pipeline. For the sampling operation of high-pressure pipeline, the requirements for personnel are high, and the operation risk is inevitable, and this method has a large personnel load. , complex proc...

AI Technical Summary

Problems solved by technology

In the past, the water dew point detection of pipeline natural gas was generally carried out offline detection in the laboratory after sampling gas from the pipeline. For the sampling operation of high-pressure pipeline, the requirements for personnel are high, and the operation risk is inevitable, and this method has a large personnel load. , complex process, long time-consuming, and insufficient real-time performance, etc., which ultimately lead to low accuracy of custody transfer of gas pipelines

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