Gas-liquid two-phase flow metering device and method

A gas-liquid two-phase flow and metering device technology, applied to measuring devices, instruments, etc., can solve the problems of phase separation and measurement error increase, and achieve the effect of small resistance loss and high measurement accuracy

Inactive Publication Date: 2016-01-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the gas-liquid two-phase flow often undergoes phase separation during the sampling process, resulting in increased measurement errors.

Method used

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  • Gas-liquid two-phase flow metering device and method
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  • Gas-liquid two-phase flow metering device and method

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Embodiment Construction

[0039] Such as figure 1 As shown, a gas-liquid two-phase flow metering device according to the present invention mainly includes a cyclone 1, a rectifier 2, an ultrasonic probe 3, an ultrasonic Doppler flow meter 5, a pitot tube 6, a differential pressure sensor 7 and data The acquisition computer 9, the cyclone 1, the rectifier 2, and the pitot tube 6 are sequentially arranged inside the pipeline 11 to be tested along the flow direction of the gas-liquid two-phase fluid. The Doppler flow meter 5 and the differential pressure sensor 7 are respectively connected to the data acquisition computer 9 through data lines.

[0040] The ultrasonic probe 3 is located on the outer wall of the pipeline 11 to be tested between the rectifier 2 and the pitot tube 6, and the angle θ between the ultrasonic probe 3 and the direction of the gas-liquid two-phase flow in the pipeline 11 to be tested is 50° to 70°. °. In order to enhance the ultrasound transmission effect, the gap between the end...

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Abstract

The invention provides a gas-liquid two-phase flow metering device, which mainly comprises a cyclone, a rectifier, an ultrasonic probe, an ultrasonic Doppler velocimeter, a Pitot tube, a differential pressure transducer, a pressure transducer, a temperature transducer, a data acquisition computer, and the like. A flow metering method provided by the invention comprises the steps of separating a gas-liquid two-phase flow in a tube by means of the cyclone to form an annular liquid film region and a central gas region, measuring the liquid flow in a liquid film by means of the ultrasonic Doppler velocimeter, and measuring the gas flow by means of the Pitot tube. Compared with a multiphase flowmeter in the prior art, the above gas-liquid two-phase flow metering device is small in size, compact in structure, small in resistance loss, wide in measurement range, and high in measurement precision.

Description

Technical field: [0001] The invention belongs to the field of flow measurement, in particular to a device and method for measuring the flow and dryness of gas-liquid two-phase flow in a pipeline. Background technique: [0002] Gas-liquid two-phase flow widely exists in many industrial fields such as petroleum, chemical industry and nuclear energy. The flow measurement of two-phase fluid in a system with two-phase flow is generally unavoidable, and it is also a difficult problem that has not been well solved. Multiphase flow measurement methods can generally be divided into three types according to whether they are separated and the degree of separation: complete separation, non-separation method, and split-phase separation method. [0003] The complete separation method is to use separation equipment to separate the gas-liquid mixture into single-phase gas and single-phase liquid, and then measure it through an ordinary single-phase flowmeter. Therefore, the measurement of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
Inventor 梁法春方召君郑洪峰孙媛宋连敏
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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