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

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...

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

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