Detection Og Gas Plpeline Effusion And Analysis Of Safe Operation

Because of many reasons, it will tend to produce effusion in gas-collecting long-distancepipeline. The existence of effusion not only drops gas transmission efficiency, but also causespipeline corrosion. It seriously influences the pipeline on normal and reliable operation.Therefore, based on effusion, the paper introduces gas-liquid two-phase flow parameters andflow pattern classification methods, researches theoretical calculation of effusion amount,analyzes vibration characteristics of pipeline conveying gas-liquid two-phase flow test withdifferent flow patterns, analyzes the failure of high sulfur gas pipeline and puts forward thecorresponding measures.Firstly, using component thermodynamic model to distinguish condensed liquid, andcombining hydraulics model to solve hold liquid rate, which is influence factor of effusionamount. The result shows that hold liquid rate would gradually increase with the existence ofcondensed liquid and it would tend to stabilize with the distance of pipeline.Secondly, the paper uses nonintervention detection method to test the horizontal pipeline andundulating pipeline in single-phase and two-phase flow situations. The measurement of vibrationsignals are separately analyzed from peak frequency, maximum amplitude, energy of velocityspectrum and acceleration spectrum. In the horizontal pipeline, analyze vibration situations ofsingle-phase under different conditions about diameter and point. And comparatively analyzethe differences of vibration spectrum signals in single-phase and gas-liquid two-phase flowpipeline. In the undulating pipeline, analyze the change conditions of peak frequency,maximum amplitude, energy under different statuses of undulating angle and flow pattern.And comparatively analyze the differences of vibration spectrum signals in the uplink pipelineand the downlink pipeline. Finally, analyze the failure factors of high sulfur gas pipeline and set up the disabled fault tree. Based on the qualitative and quantitative calculation of the faulttree, obtain the main influencing factors of pipeline failure and the probability formula of topevent. And put forward the corresponding security measures to ensure the pipeline on normaloperation.