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

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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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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