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Device and method for measuring phase holdups of solid-liquid two-phase flow

A technology of phase holdup and phase flow, which is applied in the direction of measuring devices, material analysis using sound waves/ultrasonic waves/infrasonic waves, instruments, etc., can solve the problem of expensive flow of NRM devices, unsuitable for two-phase fluids with paramagnetism, slow two-phase Fluid and other problems, to achieve the effect of convenient and effective detection, simple structure and simple operation

Inactive Publication Date: 2017-07-07
CHINA JILIANG UNIV
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Problems solved by technology

NRM is limited to non-paramagnetic two-phase fluids and is not suitable for two-phase fluids with paramagnetism, and NRM devices are very expensive and limited to slow-flowing two-phase fluids

Method used

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  • Device and method for measuring phase holdups of solid-liquid two-phase flow
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  • Device and method for measuring phase holdups of solid-liquid two-phase flow

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with drawings and embodiments.

[0048] Such as figure 1 As shown, the specific implementation of the device of the present invention includes a pipeline 1, an ultrasonic transceiver 2 and a computer 3, the pipeline 1 is vertically arranged and installed, the ultrasonic transceiver 2 is installed on the side wall of the pipeline 1, the ultrasonic transceiver 2 is connected with the computer 3, and the ultrasonic transceiver 2 Generate ultrasonic waves and send them to the solid-liquid two-phase fluid in the pipeline 1, and receive the echo signals returned by the ultrasonic waves when encountering the solid-liquid two-phase fluid, convert them into digital quantities and send them to the computer 3 for processing and calculation.

[0049] Such as figure 2As shown, the side wall of the pipeline 1 is fixedly connected to one end of the fixed sleeve 7 along the direction perpendicular to the pipeline 1,...

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Abstract

The invention discloses a device and a method for measuring phase holdups of solid-liquid two-phase flow. The device comprises a pipeline, an ultrasonic transceiver and a computer. With the phase holdups of the solid-liquid two-phase flow inside the pipeline unchanged, supersonic wave is transmitted into the pipeline to obtain an echo signal; through FFT conversion, ultrasonic echo power spectrums are obtained; multiple ultrasonic echo power spectrums fit corresponding phase holdups so as to obtain a echo power spectrum-phase holdup curve; echo attenuation is calculated to obtain an echo attenuation-phase holdup curve; and fitting curves are compared to obtain the phase holdups of the solid-liquid two-phase flow. The method is accurate and convenient in measurement; transmittance and conductivity of the two-phase flow will not affect the measurement accuracy; and the method has a wider application range.

Description

technical field [0001] The invention relates to a device and method for measuring solid-liquid parameters, in particular to a device and method for measuring solid-liquid two-phase fluid phase holdup. Background technique [0002] Two-phase flow in the oil and mining industry. At present, in the measurement methods of solid-liquid two-phase flow phase holdup, optical method, impedance method, nuclear magnetic resonance imaging (NMR) and ultrasonic method are widely used. The optical method obtains the internal information of the solid-liquid two-phase flow through optical elements, and requires the solid-liquid two-phase flow (including the pipe wall in some cases) to have good optical transparency, which greatly limits the industrial application of this method. The electrical impedance (conductance) method uses a set of electrodes to detect the electrical impedance (or conductivity) distribution inside the two-phase flow to determine the particle phase holdup inside the tw...

Claims

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Application Information

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IPC IPC(8): G01N29/032
CPCG01N29/032G01N2291/015G01N2291/02416
Inventor 刘铁军李明凯
Owner CHINA JILIANG UNIV
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