Electrical capacitance tomography sensor and system for high temperature fluidized bed measurement

A technology of electrical capacitance tomography and high-temperature fluidized bed, which is applied in the field of sensors, can solve the problems of difficult design and manufacture, great signal influence, etc., and achieve the effect of meeting the needs of dynamic testing, good insulation effect, and improving testing efficiency

Active Publication Date: 2021-06-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the high-temperature ECT sensors in the prior art adopt the method of external electrodes. The wall effect has a great influence on the signal at high temperature. To eliminate the wall effect, the method of built-in electrodes must be used.
The built-in electrode sensor is used for fluidized bed fluidization test, which has not been reported so far, and it is very difficult to design and manufacture

Method used

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  • Electrical capacitance tomography sensor and system for high temperature fluidized bed measurement
  • Electrical capacitance tomography sensor and system for high temperature fluidized bed measurement
  • Electrical capacitance tomography sensor and system for high temperature fluidized bed measurement

Examples

Experimental program
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Embodiment 1

[0055] figure 1 It is a longitudinal sectional view of an electrical capacitance tomography sensor in an embodiment of the present application, figure 2 It is a transverse cross-sectional view of an electrical capacitance tomography sensor in an embodiment of the present application, image 3 It is a schematic structural diagram of a single electrode in an electrical capacitance tomography sensor in an embodiment of the present application, Figure 4 It is a schematic structural diagram of a fixed cap in an electrical capacitance tomography sensor in an embodiment of the present application, combined with Figure 1~4 This embodiment will be specifically described.

[0056] The electrical capacitance tomography sensor provided in this embodiment includes a metal outer tube 100, a first insulating tube 200, and an electrode assembly 300; A high-temperature fluidized bed is formed in the cavity; the first insulating tube 200 is detachably inserted and fixed in the inner cavit...

Embodiment 2

[0077] Figure 5 It is a schematic structural diagram of an electrical capacitance tomography system in an embodiment of the present application, combined with Figure 5 The implementation of this embodiment will be described in detail.

[0078] This embodiment provides a capacitance tomography system, including a plurality of signal transmission lines 500 and any capacitance tomography sensor in the above-mentioned embodiments, and the plurality of signal transmission lines 500 are connected to the array electrode 301 for transmitting the array electrode 301 measures electrode signals.

[0079] Specifically, the number of signal transmission lines 500 is equal to the number of single electrodes in the array electrode 301, for example, when there are 8 single electrodes, there are 8 signal transmission lines 500, and each signal transmission line 500 is connected to a single electrode one by one. corresponding connection.

[0080] Optionally, the signal transmission line 50...

Embodiment 3

[0091] The electrical capacitance tomography sensor provided by the present application will be further introduced below.

[0092] Such as figure 1 and figure 2 As shown, the array electrode 301 includes 8 single electrodes of the same size, and the 8 single electrodes include a tile-shaped measurement part 3011 made of a stainless steel bar through a turning process and a wire cutting process. The outer diameter of the tile-shaped measuring part 3011 is equal to the inner diameter (45mm) of the supporting insulating tube 302, the length of the measuring part 3011 is 50 mm, and the thickness is 2 mm; the outer arc surface of the measuring part 3011 is welded by argon arc welding two long An M2.5 stainless steel screw of about 5 mm is used as the fixing part 3012 and the distance between the two screws is 25 mm. A stainless steel wire with a length of 500 mm and a diameter of 1 mm is welded at the middle of the top of the measurement part 3011 as the cable core of the high-te...

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Abstract

The application discloses an electrical capacitance tomography sensor for high-temperature fluidized bed measurement, including a metal outer tube, a first insulating tube, and an electrode assembly; a gas distribution plate is fixed at the bottom of the metal outer tube so that the inner cavity of the metal outer tube A high-temperature fluidized bed is formed in the middle; the first insulating tube is detachably inserted and fixed in the inner cavity of the metal outer tube; the electrode assembly is located in the inner cavity of the metal outer tube, and is tightened with the first insulating tube Assembling and fixing; the electrode assembly includes an array electrode and a supporting insulating tube, and the array electrode is fixed along the inner peripheral wall of the supporting insulating tube, wherein the array electrode is used for direct capacitance testing of fluid in a high-temperature fluidized bed. The sensor can realize the fluidization test at a high temperature of 1000°. The built-in electrode test method completely eliminates the influence of the wall effect and truly reflects the fluidization state of the measured sample; it is easy to disassemble and install, and can be used repeatedly. Improve measurement efficiency and reduce human labor.

Description

technical field [0001] The application relates to an electrical capacitance tomography sensor and system for high-temperature fluidized bed measurement, and belongs to the technical field of sensors. Background technique [0002] Electric capacitance tomography (ECT) is a kind of process tomography technology. Its basic principle is that multi-phase media have different dielectric constants. By arranging multi-electrode array capacitive sensors outside the measured object, when the measuring electrodes When the state of the section medium changes, it will cause a change in the equivalent dielectric constant, resulting in a change in the capacitance value between the electrode pairs measured by the sensor. Using the corresponding image reconstruction algorithm, the measured section can be obtained. media distribution. [0003] Disclosed in CN106896143A is a high-temperature-resistant capacitance tomography sensor, which includes an array distribution electrode, a shaft-end s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/22
CPCG01N27/22G01N27/221G01N27/226
Inventor 叶茂黄凯孟霜鹤刘中民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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