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Two-differential-pressure moisture flow on-line measuring device and method

A measuring device and dual differential pressure technology, which is applied in the direction of detecting fluid flow by measuring pressure difference and volume/mass flow generated by mechanical effects, can solve the problem of large flow resistance of orifice flowmeter, unfavorable pipeline moisture transportation, downstream flow Problems such as large field disturbance

Inactive Publication Date: 2015-12-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the flow resistance of the orifice flowmeter is relatively large, which increases the flow pressure drop and is unfavorable to the moisture transportation of the pipeline.
At the same time, the venturi of the existing dual differential pressure combination flowmeter is placed at the back, while the front orifice or V-cone disturbs the downstream flow field greatly, which is not conducive to the stability of the flow field in the installation area of ​​the combination flowmeter. And then affect the measurement performance of the rear Venturi flowmeter

Method used

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  • Two-differential-pressure moisture flow on-line measuring device and method

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Embodiment Construction

[0039] combined with figure 1 The specific embodiment of the present invention is described further:

[0040] The dual differential pressure wet gas flow online measurement device 2 includes an upstream Venturi flowmeter 1, a downstream spindle flowmeter 3 and a processor. The opposite ends of the Venturi flowmeter and the spindle flowmeter are connected by a flange. The flowmeter and the spindle flowmeter are respectively connected to the processor;

[0041] The inlet position and the throat position of the Venturi flowmeter are respectively equipped with pressure collection points, and the two pressure values ​​P1 and P2 before and after the Venturi flowmeter are collected (P1 is the upstream pressure of the Venturi flowmeter, and P2 is the downstream pressure of the Venturi flowmeter) , wherein, the pressure P1 at the inlet position of the Venturi flowmeter (that is, the upstream pressure of the Venturi flowmeter) is the pressure of the pipeline;

[0042] The upstream and...

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Abstract

The invention discloses a two-differential-pressure moisture flow on-line measuring device and method. The device comprises a Venturi flowmeter on the upstream part, a spindle flowmeter on the downstream part and a processor. The opposite ends of the Venturi flowmeter and the spindle flowmeter are connected through a flange. The Venturi flowmeter and the spindle flowmeter are connected with the processor. The processor is provided with a moisture two-phase flow measuring module, and gas-liquid two-phase flow is output on line according to input parameters. The Venturi flowmeter is arranged in front of the spindle flowmeter, and influences caused by the flowermeter on the front portion on a flow field and the flowmeter on the rear portion are reduced to the greatest degree. The spindle flowmeter is of a good streamline structure, is small in flow resistance, has the good flow stabilizing and interference resisting ability and is arranged on the downstream part of the Venturi flowmeter, and therefore the measuring performance of the combined flowmeter can be improved to the greatest degree.

Description

technical field [0001] The invention relates to an on-line monitoring device for wet gas flow, in particular to an online measuring device and method for wet gas flow with double differential pressure of Venturi and spindle. Background technique [0002] Currently, most of the flowmeters on the market are single-phase fluid flowmeters, and the types of flowmeters for online measurement of wet gas two-phase flow are few and expensive. The differential pressure flowmeter has stable performance and low cost, and has a wide range of application fields. In the flow measurement model of the differential pressure method, the flow rate is a function of the pipe size, the physical properties of the fluid, and the differential pressure of the flowmeter. The dual differential pressure flowmeter is mainly composed of two differential pressure flowmeters at the front and rear. In the dual differential pressure wet gas flow online measurement model, the two-phase flow is a function of th...

Claims

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Application Information

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IPC IPC(8): G01F1/44G01F1/36
Inventor 周日峰白博峰许光赵雯晴张健中
Owner CHINA PETROLEUM & CHEM CORP
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