Flow measuring device for gas-liquid two-phase fluid and measuring method thereof

Abstract

The invention discloses a flow measuring device for gas-liquid two-phase fluid and a measuring method thereof. The flow measuring device mainly consists of a horizontal pipeline, a liquid collection box, a gas collection box, a gas flow meter and a liquid flow meter; when flowing through the horizontal pipeline, the gas-liquid two-phase fluid generates natural separation under the action of gravity thereof, i.e. the liquid is deposited on the bottom of the pipeline, and the gas is gathered on the upper part of the pipeline; the liquid is collected into the liquid collection box through the porous wall of the lower part of the pipeline, and then is measured by the liquid flow meter; and simultaneously, part of the gas is collected into the gas collection box through the porous wall of the upper part of the pipeline, then is measured by the gas flow meter, and then is subject to conversion based on the proportional relationship to obtain the total gas flow. By adopting the invention, the separation method is simplified, the volume of the whole measuring device is greatly reduced, the measurement instantaneity is improved, and the automaticity is improved, thus the invention is convenient to be applied to engineering.

Description

technical field [0001] The invention belongs to the technical field of multiphase flow flow measurement, and in particular relates to a flow measurement device and a measurement method for gas-liquid two-phase fluid. Background technique [0002] At present, the traditional gas-liquid two-phase fluid flow measurement method is still the separation method, that is, a gas-liquid two-phase fluid is firstly separated into single-phase gas and liquid by using a gas-liquid separation device, and then each phase is measured by a single-phase flowmeter. flow. The advantage of this method is that it has high working reliability and the measurement result has nothing to do with the flow pattern, but the biggest disadvantage is that the equipment is huge, the cost is high, the degree of automation is low, and the real-time performance of the measurement is poor. These shortcomings seriously limit its wide application in engineering, especially as the diameter of the fluid pipeline inc...

AI Technical Summary

Problems solved by technology

On the surface, this method does save the traditional separator, but because the diameter of the steel pipe used is very large, and also uses the cyclone separation method and the complicated liquid level control system, it is essentially different from the traditional separator. There is no substantial difference between the two methods, and the more important thing is that this system is only suitable for occasions where the gas phase flow rate is relatively small, and is not suitable for working conditions with high gas content

Because as the gas velocity increases, the ability of the gas to carry liquid also increases. When the gas is separated from the pipeline, a large amount of liquid will inevitably follow the gas into the gas pipeline, resulting in separation failure.

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