Testing device and testing method for pollution reduction of maintenance liquid in pipeline

Abstract

The invention discloses a testing device and a testing method for pollution reduction of maintenance liquid in pipeline for the purpose of testing the pollution reduction performance of drag reduction agent to the maintenance liquid or dropsy in gas pipeline. A zero net-liquid gas-liquid two-phase flow is used as an experimental physical model of the maintenance liquid in gas pipeline; a critical inclination is used as the smallest inclination of the maintenance liquid or dropsy in gas pipeline and a vertical ascent pipe is used as the pipe with the biggest inclination. The pollution reduction rate of the maintenance liquid in the vertical pipeline and the tipping tube with an inclination as the critical inclination is used as the base data of the pollution reduction effect to the maintenance liquid of drag reduction agent. The performing method is to measure the liquid content remaining in a measuring section by a testing device which comprises a vertical pipeline and a tipping tube to acquire the rate of liquid maintenance in pipeline. The pollution reduction rate of the maintenance liquid is acquired by comparing the relative change rate of the maintenance liquid before and after adding the drag reduction agent.

Description

technical field [0001] The present invention relates to a test device and test method for pipeline liquid retention and emission reduction, especially for testing the reduction of drag reducer on pipeline liquid retention or liquid accumulation in the state of gas-liquid two-phase flow for natural gas pipelines or other gas pipelines performance. Background technique [0002] Multiphase flow drag reduction technology is not only to reduce flow frictional resistance, in some flow conditions, the main goal of multiphase flow drag reduction is to reduce pipeline liquid holdup. [0003] In the natural gas production and transportation system, liquid retention refers to the phenomenon that the liquid accumulated in the pipe cannot be discharged with the gas flow and continuously accumulates in the local area of ​​the pipeline. This phenomenon is also called liquid accumulation. The liquid-holding phenomenon in gas pipelines is often a special local phenomenon. At this time, the ...

AI Technical Summary

Problems solved by technology

The liquid-carrying ratio of foam is only a parameter reflecting the liquid-carrying ability of foam, and cannot reflect the real content of liquid in the pipeline

Therefore, by testing the liquid-carrying ratio of the foam, or by testing the amount of liquid discharged at the outlet of the pipe, it is impossible to accurately represent the true degree of the reduction of liquid holding in the pipe.

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