Wet gas flow online measurement method and device based on piecewise characteristic of pressure loss ratio of V cone

A measurement method and segment characteristic technology, which is applied in the field of multiphase flow measurement, can solve problems such as poor safety and reliability, high cost, complex structure, etc., achieve impact resistance and device reliability, improve measurement accuracy, and reduce cumulative errors. Effect

Active Publication Date: 2020-02-14
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] Aiming at the problems of complex structure, high cost and poor safety and reliability of gas-liquid two-phase flow measurement devices in the prior art, an online wet gas flow measurement method and device based on the V-cone pressure loss ratio segmentation characteristics are provided, which have a simple structure, With the advantages of low cost, safety and reliability, the measurement accuracy can meet the needs of industrial measurement

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  • Wet gas flow online measurement method and device based on piecewise characteristic of pressure loss ratio of V cone
  • Wet gas flow online measurement method and device based on piecewise characteristic of pressure loss ratio of V cone
  • Wet gas flow online measurement method and device based on piecewise characteristic of pressure loss ratio of V cone

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Embodiment Construction

[0056] The present invention will be further described in detail below in conjunction with the accompanying drawings, which are explanations rather than limitations of the present invention.

[0057] refer to figure 1 , an online wet gas flow measurement device based on the V-cone pressure loss ratio segmentation characteristics, including a downstream flange 1, a pipe 2, a V-cone 3 and an upstream flange 4.

[0058] The upstream flange 1 and the downstream flange 4 are connected to the pipeline 2 by welding and are located at both ends of the pipeline. The pressure gauge 5 is used for pressure measurement in the pipeline 2, and the differential pressure gauge 6 is used for the upstream of the V cone 3 and the throat of the V cone 3. The pressure at the throat position of the V-cone 3 is measured through a hole at the apex of the back-cone of the V-cone 3, and the pipe 2 is led out from the support rod through the cone. The differential pressure gauge 7 is used to measure the t...

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Abstract

The invention discloses a wet gas flow online measurement method and device based on the piecewise characteristic of the pressure loss ratio of a V cone. The V cone of a throttling element is fixed through three support columns which are distributed uniformly along the circumferential direction, so that the impact resistance of the throttling element can be improved effectively, and the device reliability is improved. A two-phase mass flow coefficient K and a pressure loss ratio delta with the piecewise function characteristic are introduced to establish a two-phase flow prediction relation; the temperature, pressure, pressure difference and pressure loss signal in a pipeline are acquired in real time; and the signal is solved iteratively based on the established two-phase flow predictionmethod, so that the online measurement of the two-phase flow can be realized. The wet gas flow dual-parameter online measurement method and device based on the piecewise characteristic of the pressureloss ratio of the V cone have the advantages of simple structure, stability and reliability, and the measurement accuracy can meet the industrial demands.

Description

technical field [0001] The invention belongs to the field of multiphase flow measurement, and in particular relates to an online measurement method and device for wet gas flow based on the V-cone pressure loss ratio segmentation characteristics. Background technique [0002] Moisture widely exists in scientific research and engineering practice in the fields of nuclear energy, chemical industry, metallurgy, and power. The precise measurement of gas-liquid two-phase flow in wet gas has always been one of the research hotspots in the field of multiphase flow. [0003] At present, the measurement of gas-liquid two-phase flow is mainly divided into two types: separation method and on-line method. The separation measurement method has huge equipment, high investment cost and cannot be measured in real time. Pressure flowmeters are widely used, and the representative ones are single-phase flowmeter combination, single-phase flowmeter and phase holdup sensor combination. The singl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/86
CPCG01F1/86
Inventor 白博峰赵凡任舒心李珊珊
Owner XI AN JIAOTONG UNIV
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