Multi-blade capacitor device with phase separation function of swirling flows for measuring moisture content

Abstract

The invention relates to a multi-blade capacitor device with a phase separation function of swirling flows for measuring the moisture content, which comprises a swirling flow phase separation unit anda capacitance measuring unit. The device is characterized in that: the swirling flow phase separation unit comprises a spiral blade support rod, and two or more spiral blades and an outer tube wall distributed on the outer circumference of the spiral blade support rod; the capacitance measuring unit comprises a metal inner core, an insulating layer and an outer metal tube wall covering the outercircumference of the metal inner core; the water-facing surface of the spiral blade support rod is streamlined. The multi-blade capacitor device has a good distribution effect of gas-liquid phase separation and does not depend on two-phase flow pattern, and can reliably measure the moisture content through the capacitor unit.

Description

technical field [0001] The invention belongs to the technical field of flow measurement of gas-liquid two-phase flow, and relates to a multi-blade flow-guiding swirl phase-separation capacitor water content measuring device. Background technique [0002] Gas-water two-phase flow exists widely in petroleum, chemical industry, energy and other fields, and the accurate measurement of its water content is of great significance. At present, the water content measurement methods mainly include ray technology, microwave technology, electrical (resistance, capacitance) technology, differential pressure technology, etc. The use of radioactive techniques has been limited in recent years due to increasingly stringent safety regulations. [0003] Among the non-radioactive water content measurement technologies, the capacitance method has a long history, simple principle, and convenient maintenance. The disadvantage is that it is seriously affected by the flow pattern. [0004] Based o...

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Problems solved by technology

[0008] Chinese patent application 201710465819.9 and Chinese patent application 201710465822.0 propose a device that can improve the capacitive sensor being affected by the flow pattern and measure the water content of the capacitor by diversion type swirl phase separation. However, because the device is designed for a single helical blade, it will cause two Phase flow has limited swirling effect at low flow rates

[0009] To sum up, according to the analysis of the research status of the phase holdup measurement by the capacitance method, it can be seen that domestic and foreign researchers have carried out a lot of research work on the capacitor structure and gained valuable experience. However, the response of the capacitance sensor still strongly depends on Due to the spatial distribution of the dispersed phase medium, the measurement results of the phase holdup are all affected by the flow structure

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