Method and device for measuring high-temperature and high-pressure wet steam flow

Abstract

The invention provides a method and device for measuring the high-temperature and high-pressure wet steam flow. The flow of fluid, the flow of a gas phase and the flow of a liquid phase can be obtained through the device without the requirement for separating the gas phase and the liquid phase of wet steam in advance. When the fluid passes through two V cone flowmeters with different diameters, pressure drop will be generated, and the mass flow rate of the fluid passing through a V cone can be calculated through the leant fluid knowledge. On the basis of the mass conservation principle, a basic equation can be derived, and the wet steam dryness can be obtained through the obtained equation. The wet steam flow can be worked out through the wet steam dryness and the flow of the liquid phase, wherein the flow of the liquid phase is measured through an ultrasonic Doppler flowmeter. The flow of the gas phase under the non-standard condition can be converted into the flow of the gas phase under the standard condition through a pressure and temperature sensor. The obtained data are connected with an ADAM data acquisition module, and finally the data are output.

Description

technical field [0001] The invention belongs to a method and device for measuring the flow rate of high-temperature and high-pressure wet steam used in oil fields, and specifically calculates the dryness of wet steam and the flow rate of passing liquid, thereby calculating the flow rate of each phase flow of gas and liquid. Background technique [0002] Moisture is a special form of gas-liquid two-phase flow, which widely exists in energy power, chemical industry, metallurgy and other industries. If only a single-phase fluid flows, its flow law is basically the same, and it is easy to establish a general mathematical model according to its characteristics. However, when two-phase or multi-phase fluids flow together, their physical properties and chemical changes may change dramatically. Fluid density, viscosity, etc., so when gas and liquid exist at the same time, those theories and mathematical equations of individual gas or liquid flow can no longer be applied. However, w...

AI Technical Summary

Problems solved by technology

This has forced scientists to extensively study and experiment with moisture, but current measurement methods are relatively complex and expensive

[0003] At present, the measurement methods of gas and liquid flow can be roughly classified into two categories. One is to separate the gas and liquid in advance and then measure them separately. Whether the remixing after separation can be consistent with the properties of the fluid before separation, and the cost of separation technology is also considerable

Therefore, it is somewhat unrealistic

Second, there are currently many methods of direct measurement without gas-liquid separation as in this article, but these technologies often use gamma rays; microwaves; capacitors, etc. Sensitive to the state, the calculation result is not easy to be stable, and the price is expensive, and the installation and maintenance are quite troublesome

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