In-pipe phase-separated high-gas content gas-liquid two-phase fluid flow measurement device and method
A measuring device and fluid flow technology, which is applied in the direction of volume flow measuring device, liquid/fluid solid measuring, measuring device, etc., can solve the problems of low measurement lower limit, difficult measurement, inability to measure, etc., to reduce volume, reduce manufacturing cost, Improve real-time performance
Inactive Publication Date: 2017-03-29
XI AN JIAOTONG UNIV
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However, there will be a difficulty in use. When the flow rate of the liquid phase or the gas phase in the two-phase flow is very small (high gas content or low gas content), due to the split flow, the liquid phase flowing out of the separator Or the gas phase flow rate is even smaller, so that it is lower than the measurement lower limit of the existing smallest flowmeter, which makes measurement difficult or even impossible to measure
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[0026] The present invention will be described in more detail below in conjunction with the accompanying drawings.
[0027] attached figure 1 According to the current research results of two-phase flow, such as the Mandhane flow diagram, the flow diagram of the gas-liquid two-phase fluid in the horizontal tube at high gas content (volume gas content greater than 90%) is drawn. The gas 01 is distributed in the pipeline 2 in the form of a continuous state (the blank part in the figure), while the liquid exists in the pipeline 2 in three forms: dispersed in the gas as fine droplets 4 (micron level and below) to Large droplets 6 (millimeter scale) are suspended in the gas flow and adhere to the tube wall with a continuous liquid film 8 . When the flow velocity is low (less than 4-6 m / s), the liquid film 8 will be deposited on the bottom of the pipeline 2 (with figure 1 , A), when the flow rate increases further (greater than or equal to 6-12 m / s), a semi-annular flow (attached ...
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A device and method for measuring the flow rate of gas-liquid two-phase fluid with high gas content and high gas content in a pipe, the device mainly consists of a pipe, an inner pipe, a two-stage cyclone, a reducer, a swirl pipe, a transition pipe, and an expander , racemator, conventional small separator, and gas and liquid flowmeters; the method adopts the phase separation technology in the pipe, cooperates with centrifugal and gravity separation, and completes the complete separation of gas-liquid two-phase fluid in the pipe through multiple separation steps , and finally use the gas and liquid flow meters to measure the flow of each phase; through the present invention, the volume of the separation method-like gas-liquid two-phase flow measurement device can be greatly reduced, the real-time performance of the measurement can be improved, and the manufacturing cost can be significantly reduced. Widely used in engineering.
Description
technical field [0001] The invention belongs to the technical field of flow measurement, and in particular relates to a flow measurement device and method for gas-liquid two-phase fluid with high gas content and high gas content in a pipe. Background technique [0002] "Phase" in the present invention refers to each part of the multiphase fluid with the same physical properties, such as gas phase, liquid phase, oil phase, water and so on. Among them, the gas phase and liquid phase can be either single-component substances, or a uniform mixture of multi-component substances, such as air, crude oil, etc. In-pipe phase separation refers to the process of converging and isolating each phase to a specific area in the pipe, so as to finally achieve complete separation. Among the two-phase flow measurement techniques, the separation method is still the most reliable and accurate technique at present. Because this method separates the gas-liquid two-phase fluid into single-phase g...
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IPC IPC(8): G01F15/08G01F7/00
Inventor 王栋卫鹏凯王帅杨杨
Owner XI AN JIAOTONG UNIV