Measuring method and device of eddy flow enriched sparseness gas and solid two-phase flow capacitance chromatography imaging

A technology of electrical capacitance tomography and measuring devices, which is applied in the direction of mass flow measuring devices, volume flow measuring devices, measuring devices, etc., and can solve problems such as poor spatial resolution, uneven distribution of sensitive fields, and weak sensitivity of large-diameter pipes , to achieve the effect of broadening the application range, improving measurement accuracy and spatial resolution

Inactive Publication Date: 2009-05-27
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0005] In order to overcome the shortcomings of existing ECT sensors such as weak sensitivity to large-diameter pipes, poor spatial resolution, and uneven distribution of sensitive fields, especially for sparse gas-solid two-phase flow, the present invention provides a warp-

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  • Measuring method and device of eddy flow enriched sparseness gas and solid two-phase flow capacitance chromatography imaging
  • Measuring method and device of eddy flow enriched sparseness gas and solid two-phase flow capacitance chromatography imaging
  • Measuring method and device of eddy flow enriched sparseness gas and solid two-phase flow capacitance chromatography imaging

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[0023] exist figure 1 A schematic diagram of the cyclone concentration structure of the present invention can be seen in , wherein (1) is the inlet of the cyclone separator, (2) is the sensor electrode, (3) is the insulation test pipe section, and (4) is the shielding cover. The sensor electrode has two layers, the upper layer is used for concentration measurement, and the lower layer sensor is used to capture the capacitance signal and perform correlation calculation with the upper layer capacitance signal. There is no specific regulation on the electrode length. Here, the electrode length is 1.2 times the outer diameter of the test pipe section. The electrode width is equally divided into the outer circumference of the test pipe section according to the number of electrodes. The center distance of the two-layer electrode sensors is 1.5 to 2 times the test section pipe diameter. In order to obtain better imaging quality and improve the measurement accuracy of the concentratio...

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Abstract

The invention discloses an eddy flow concentration sparse gas-solid two-phase flow capacitance chromatography imaging measurement method and device which belong to gas-solid two-phase flow measurement technology. The device includes an eddy flow concentration apparatus connected with a sparse gas-solid two-phase flow channel, the eddy flow concentration apparatus is connected with a control valve and an air pump, an outlet of the air pump is connected to the sparse gas-solid two-phase flow channel. The method includes that after eddy flow concentration of the sparse gas-solid two-phase flow, solid particle is concentrated at wall surface, solid particle concentration is measured by single-layer capacitance sensor, speed is measured by double-layer capacitance sensor, and mass flow of the solid particle can be calculated by combining the solid particle concentration and the speed. Capacitance chromatography imaging technology is used to measure improved measurement precision. The measurement method and sensor provided by the present invention integrate concentration, speed and mass flow measurement, have advantages of simple structure and convenient calibration, solve problem of measuring the sparse gas-solid two-phase flow in large-diameter pipeline by using the capacitance chromatography imaging technology, and have wide application field.

Description

technical field [0001] The invention belongs to gas-solid two-phase flow measurement technology, and in particular relates to a cyclone concentration method that uses electric capacitance tomography (Electri calcapacitance tomography, ECT) to measure the sparse gas-solid two-phase flow through the cyclone concentration. Sparse gas-solid two-phase flow capacitance tomography measurement method and device. Background technique [0002] Gas-solid two-phase flow is one of the important operation methods in the process of material conversion, energy utilization and environmental protection. In the electric power, metallurgy, chemical industry, food and other industrial sectors, pipeline pneumatic conveying technology is widely used to transport coal powder, ore, plastic Granules, salt and flour, etc., all belong to the category of gas-solid two-phase flow. Among them, the mass flow measurement and control of gas-solid two-phase flow is a difficult problem that needs to be solved...

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Application Information

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IPC IPC(8): G01F1/86G01F7/00
Inventor 刘石李志宏韩振兴李惊涛孙猛
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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