Capacitive gas-liquid two-phase separation flow liquid film distribution measuring device
A measurement device and capacitance measurement technology, which is applied in the field of multiphase flow measurement, can solve problems such as uneven distribution of liquid film thickness and inability to obtain liquid film distribution rules, and achieve the elimination of liquid film thickness identification errors, small probe diameter, and structure simple effect
Inactive Publication Date: 2017-02-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
For the horizontal pipe annular flow, due to the gravity, the distribution of the liquid film thickness along the circumferential direction is not uniform, so the distribution law of the liquid film along the circumferential direction cannot be obtained by using this measurement method
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[0022] Such as figure 1 As shown, the present invention is mainly composed of a capacitance probe 1, a liquid phase electrode 2, a fixed ring 3, a capacitance measurement module 4 and a signal acquisition computer 5, the fixed ring 3 is located at the center of the measured pipeline 6, and one end of the capacitance probe 1 is fixed In the positioning hole 12 on the fixing ring 3, the other end is connected to the capacitive electrode 9 on the probe terminal 8 through the lead hole 7 arranged on the pipe wall, and several capacitive probes 1 are in the shape of Distributed radially, the capacitance electrode 9 and the liquid phase electrode 2 are respectively connected to the capacitance measurement module 4 through wires, and the capacitance measurement module 4 is connected to the signal acquisition computer 5 through data lines.
[0023] Such as figure 2 As shown, the capacitive probe 1 has a double-layer structure, the center is a conductive core 10, and the outer wall o...
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Abstract
The invention relates to a capacitive gas-liquid two-phase separation flow liquid film distribution measuring device. The measuring device mainly comprises capacitance probes, a liquid phase electrode, a fixing ring, a capacitance measurement module and a signal acquisition computer; and the plurality of capacitance probes are radially distributed on the cross-section of a pipeline through the fixing ring, so that accurate measurement of liquid film distribution at different locations of the cross-section of the pipeline can be realized. Compared with an existing measuring device, the capacitive gas-liquid two-phase separation flow liquid film distribution measuring device of the invention can eliminate liquid film thickness identification error when liquid phases exist at two sides of each conventional capacitance probe, is simple in probe layout, is not affected by temperature and the salt content of a medium, small in flow interference, low in manufacture cost, high in measurement accuracy, and has a broad application prospect in the two-phase flow measurement field.
Description
technical field [0001] The invention belongs to the technical field of multiphase flow measurement, and in particular relates to a capacitive gas-liquid two-phase separation flow liquid film distribution measurement device. Background technique [0002] Gas-liquid two-phase flow widely exists in petroleum, chemical, energy and power engineering fields. Due to the variability of flow pattern and the randomness of phase interface in gas-liquid two-phase flow, the measurement of phase interface parameters has always been a difficult problem. According to whether the gas-liquid phase is separated, the gas-liquid two-phase flow can be divided into separated flow, intermittent flow and diffuse flow. The most typical split flow patterns are stratified flow and annular flow. For these two flow patterns, the distribution of the liquid film is the most critical parameter, and accurate measurement of the circumferential distribution of the liquid film is the basis for studying the flo...
Claims
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Login to View More IPC IPC(8): G01B7/06
CPCG01B7/085
Inventor 梁法春孙石涛谢振强方召君陈婧曹学文
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)