Model method for measuring flow rate of air-assisted liquid by Coriolis mass flowmeter (CMF)

A mass flow meter, liquid flow technology, applied in the direction of mass flow measurement devices, indirect mass flow meters, etc., can solve problems such as affecting the response of Coriolis mass flow meters

Inactive Publication Date: 2012-02-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of this slip velocity affects the response of the Coriolis mass flowmeter

Method used

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  • Model method for measuring flow rate of air-assisted liquid by Coriolis mass flowmeter (CMF)
  • Model method for measuring flow rate of air-assisted liquid by Coriolis mass flowmeter (CMF)
  • Model method for measuring flow rate of air-assisted liquid by Coriolis mass flowmeter (CMF)

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Embodiment Construction

[0028] The air-entrapped liquid flow measurement device based on Coriolis mass flowmeter has a metering pipeline (1), on which a pressure sensor (2), a Coriolis mass flowmeter (3), and an A / D conversion card are sequentially arranged on the metering pipeline (1) (4) is connected with the pressure sensor (2) and the Coriolis mass flow meter (3), and the computer (5) is connected with the A / D conversion card (4).

[0029] In this embodiment, the gas volume flow rate is from 0.29m 3 / h to 0.905m 3 / h, and the flow rate of air-entrained liquid with a water mass flow rate of 170Kg / min shall be measured by the model method.

[0030] 1) Measurement data

[0031] The pressure sensor is used to measure the instantaneous pressure P of the pipeline, and the Coriolis mass flowmeter is used to measure the instantaneous mass flow rate M of the gas-entrained liquid t , density ρ m and temperature T.

[0032] 2) Build a model

[0033] Establish the density ρ measured by the Coriolis mas...

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Abstract

The invention discloses a model method for measuring the flow rate of air-assisted liquid by a Coriolis mass flowmeter (CMF), which comprises the following three basic steps: 1) acquiring data by measurement: acquiring the data such as pressure value, instantaneous mass flow rate, medium density and medium temperature; 2) building models: building the relational model between density and air-assisted liquid flow density which are measured by the CMF, building the response model of the CMF, and building the drift-flux model of the air-assisted liquid; and 3) measuring the flow rate: estimating the flow density, the volume flow rate and the air void of the air-assisted liquid, and applying the drift-flux model to calculate instantaneous volume flow rate and the mass flow rate of gas and liquid. The model method for measuring the flow rate of the air-assisted liquid by the CMF has the advantages that the method is simple in structure, convenient to install, good in real-time performance, reliable, easy to realize and the like. The model method is applicable to measuring the air-assisted liquid. The model method can be used for measuring the flow rate of the air-assisted liquid. When the air void is less than 8%, the maximum relative error of liquid phase flow rate is 5%, and the maximum relative error of gas phase flow rate is 10%.

Description

technical field [0001] The invention belongs to the technical field of fluid measurement, and in particular relates to a model method for a Coriolis mass flowmeter to measure the flow of gas-entrained liquid. Background technique [0002] Air-entrained liquids widely exist in petroleum, chemical industry, metallurgy, energy, power, light industry and other departments. The universality and importance of its application have prompted the rapid development of research work in this field. Entrained liquid refers to the transition between liquid and gas or the medium containing two states caused by the design or flow conditions of the fluid in the pipeline. The flow rate of air-entrained liquid is a parameter with important scientific and engineering significance in the gas-liquid two-phase flow system, which has a significant impact on the measurement, control, reliability and efficiency of the gas-liquid two-phase flow application system. An important research direction in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/86
Inventor 王微微王平任东顺樊尚春朱小倩
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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