Double differential pressure throttle moisture measuring device

Abstract

The invention belongs to the multiphase flow rate measuring field, and relates to an online measuring device of the containing rate and flow rate of gas-liquid two phases, gas and liquid, which is composed of a double throttling device, comprising a conical throttling device and a Venturi throttling device which are connected in sequence, a measuring pipeline is installed with differential pressure, pressure and temperature transducers, the connection of the differential pressure transducer and the pressure transducer with the measuring pipeline is matched with a gas-liquid separation pot, the lower end of which is matched with a drain valve. The device has the advantages of simple structure, reliable measurement, no movable parts, convenient, reliable and accurate signal acquisition and the like, and the implementation is simple and convenient.

Description

technical field [0001] The invention belongs to the technical field of multiphase flow measurement and relates to a double differential pressure throttling device. Background technique [0002] Gas-liquid two-phase flow means that there are two different phases in the pipeline fluid flow process, namely gas phase and liquid phase, because there is a deformable interface between the two phases, and the gas phase is compressible, and there is a velocity slip between the two phases. The physical and chemical properties of the two phases are quite different, so the flow process is very complicated. There are many studies on this kind of flow at home and abroad, but due to its difficulty, the development has been slow. Moisture is a special form of gas-liquid two-phase flow, which is quite common in industrial production processes, such as oil and natural gas industries. In order to meet the application requirements of industrial sites, it is necessary to measure the flow of we...

AI Technical Summary

Problems solved by technology

The problem with this method is whether the gas-liquid ratio of the two-phase fluid in the sampling part is consistent with the ratio in the original flow; whether the sampling ratio itself is affected by the flow pattern, flow fluctuation, etc.

The limitations of this flowmeter are: using the mutual combination of Venturi, the differential pressure device has a similar structure and similar measurement characteristics, the resolution of the liquid phase holdup and the false high correction value is low, and the additional mixer has a large pressure loss. reduced measuring range

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