Safe and quick method for precisely determining gas-liquid ratio

Abstract

The invention relates to a safe and quick method for precisely determining the gas-liquid ratio. The method is implemented by a precise gas-liquid ratio measuring device. The method includes the following specific steps that after a liquid-carrying gas phase enters a flow fine-tuning valve from a pipeline, a gas source with lower pressure and stable and slow flow rate can be obtained; after treatment, the gas source enters the middle of a buffer flask from a gas inlet pipeline and then rapidly expands in the buffer flask, the temperature and the pressure are fully lowered, cooling liquid in the gas inlet pipeline directly drops into a liquid meter, and the remaining fluid is further cooled by a peripheral cooling tank; the separated liquid enters the liquid meter, and the gas phase entersthe gas meter through a gas outlet pipeline. The entire measuring body device including the buffer flask, the liquid meter and a base is designed in an integrated structure. After the measurement is completed, the gas source is turned off, the liquid meter and other main devices are taken out from the liquid nitrogen cooling tank, and the precise gas-liquid ratio can be obtained by directly reading data on the liquid meter and a gas meter when the temperature of the liquid meter and gas meter is restored to room temperature. The process test is safe, and the method is convenient and fast, highin test precision and easy to apply and popularize.

Description

technical field [0001] The invention relates to a safe and quick method for accurately measuring the gas-liquid ratio of a liquid-carrying gas phase. Background technique [0002] In the chemical industry, petroleum engineering and other fields, experiments to accurately determine the gas-liquid ratio are involved. For example, in the field of petroleum engineering, it is often necessary to know the precise composition of underground crude oil to provide basic data for numerical simulation. For example, in the compounding experiment of condensate oil, in order to verify whether the components of the condensate oil have been formulated are correct, it is necessary to re-separate the gas-liquid at room temperature and test again. Therefore, a method that can accurately measure the gas-liquid ratio is particularly important. However, when conducting condensate compounding experiments at present, the gas source is often under sufficient pressure and the flow rate is fast, resul...

AI Technical Summary

Problems solved by technology

However, when doing condensate oil compounding experiments, the gas source is often under sufficient pressure and the flow rate is fast, resulting in incomplete gas-liquid separation, affecting measurement accuracy, and it is easy to burst the test tube for measuring liquid samples, causing safety hazards

In addition, when the liquid phase volume is small, the laboratory generally uses a graduated needle tube to inhale and read. Due to the inevitable adsorption residue on the test tube, considering that the liquid phase volume is originally small, the secondary error will be large.

Finally, there may be convection between the pipelines, and the gas phase after gas-liquid separation may still carry liquid seriously, which will affect the test accuracy

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