Arrangement for determining the phase distribution in multiphase media having at least one highly conductive phase

摘要

A grid sensor for measuring the phase distribution of a multiphase substance mixture with gaseous and liquid components in the presence of a highly conductive phase (such as salt water or liquid metal) employs 3 superposed electrode planes and an electronic measuring device. Application areas include determination of the liquid distribution and the fill level in containers, as well as the investigation of gas-liquid multiphase flows, in particular in pipelines, e.g. in petroleum production and processing.

主权项

1. Arrangement for determination of the phase distribution in multi-phase fluids with at least one highly conductive phase fraction and further presence of non-conductive and/or other conductive components, comprising three superposed electrode planes of wire-shaped electrodes, which are clamped in a sensor frame, wherein:
a. the electrodes in each plane are disposed in parallel with a small spacing to each other, b. two of the electrode planes are galvanically separated from a study medium by an insulating layer and one of the two electrode planes functions as a transmitter plane and another one as a receiver plane, and the two electrode planes are arranged in parallel and rotated at an angle to one other, c. a third one of the electrode planes is not isolated and is at ground potential, and the at least one highly conductive phase fraction in contact with the third one of the electrode planes is thus also at ground potential, and d. the arrangement is connected to an electronic measuring device configured to measure electrical capacitance or permittivity of the medium in individual intersections formed by the electrodes of the transmitter plane and the electrodes of the receiver plane, and the electronic measuring device is configured to successively charge a corresponding electrode of the transmitter plane with an AC voltage, while all other electrodes of the transmitter plane are switched to ground, and the electronic measuring device is configured to simultaneously measures step response function of a current signal at all electrodes of the transmitter plane in parallel.