Two-phase flow and dual parameter measurement with bent tube and flowmeter combination and system thereof

A flowmeter and dual-parameter technology, applied in the field of dual-parameter measurement methods and systems, can solve the problems of high instrument cost of imaging content rate analyzer, inapplicability of capacitance analyzer, unsatisfactory use effect, etc., and achieve low cost and system Small pressure loss and good reliability

Inactive Publication Date: 2006-03-15
薛国民
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Problems solved by technology

The principle of the density meter method is simple, but the actual application of the vibrating tube density meter is affected by problems such as installation stress and fouling, and the effect is not ideal. The capacitance analyzer is not suitable for high water content conditions, and the ray attenuation analyzer contains radioactive components. , safety and environmental protection in many aspects of management restrictions, imaging content analyzer instrument cost is high, complex equipment

Method used

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  • Two-phase flow and dual parameter measurement with bent tube and flowmeter combination and system thereof
  • Two-phase flow and dual parameter measurement with bent tube and flowmeter combination and system thereof
  • Two-phase flow and dual parameter measurement with bent tube and flowmeter combination and system thereof

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Embodiment Construction

[0008] As shown in the figure, the measurement system includes a differential pressure transmitter 1 , an elbow sensor 2 , a pressure transmitter 3 , a temperature transmitter 4 , a flow meter 5 , and a computer 6 .

[0009] When the fluid flows through the elbow 2 at a certain flow rate, a pressure difference is generated between the inside and outside of the elbow under the action of centrifugal force, and the differential pressure transmitter 1 detects the differential pressure value of the symmetrical part inside and outside the elbow, and the differential pressure is related to the flow velocity, fluid density, The functional relationship of the elbow structure size parameters is

[0010] ΔP = cρd v 2 R . . . ( 1 )

[0011] In the formula: ΔP-the pressure difference between the inner and oute...

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Abstract

A method of measuring double parameter of two ¿C phase stream by elbow and flow meter integrated system includes utilizing said system to obtain flow rate signal, differential pressure signal, fluid pressure signal and temperature signal; calculating out fluid average flow speed as per pipe section area based on obtained signals; obtaining mixed fluid density based on function relation of fluid density to elbow differential pressure and average flow rate; calculating out phase content rate of each fluid and flow rate of each phase as per fluid density of each phase . The elbow and flow meter integrated system is also provided.

Description

Technical field [0001] The invention belongs to the technical field of measurement and detection, and relates to a dual-parameter measurement method and system combined with an elbow and a flow meter for simultaneous measurement of liquid-liquid two-phase flow and phase holdup. Background technique [0002] Liquid-liquid two-phase flow commonly exists in petroleum, chemical and other industrial fields. Conventional metering methods are divided into two ways: separate metering and non-separate metering. Separation metering separates the liquid and liquid phases and then measures them separately. The advantage is that the single-phase liquids are measured separately, and the measurement accuracy is good. However, in the industrial process, to achieve ideal liquid-liquid separation requires the addition of high-efficiency separation devices and sufficient separation time, which affects the need for real-time measurement. The non-separated measurement adopts the method of flow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/34G01F5/00G01D21/02
Inventor 薛国民
Owner 薛国民
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