Device and method for detecting flow parameters of powder flow in rectangular tube based on electrostatic induction
A technology of electrostatic induction and flow parameters, which is used in measurement devices, fluid dynamics tests, and testing of machine/structural components. Flow field distribution identification and other issues, to achieve the effect of simple structure, low maintenance cost and low price
Inactive Publication Date: 2017-08-04
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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However, since the square electrostatic sensor in this patent uses a square ring electrode that surrounds the entire pipeline section, although it has high sensitivity, it cannot measure the flow parameters of the local powder at the sensor section, and cannot realize the flow field distribution (i.e. flow pattern) identification , and in practical applications, it is difficult to achieve accurate measurement of powder flow velocity and flow
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[0030] The invention provides a device and method for detecting flow parameters of powder flow in rectangular pipes based on electrostatic induction, which realizes real-time detection of overall and local flow parameters of powder flow in rectangular pipes, and makes up for the gap in the application of electrostatic sensors to rectangular pipes. Below in conjunction with accompanying drawing and implementation example the present invention will be further described:
[0031] The schematic diagram of the structure of the powder flow parameter detection device in the rectangular tube based on electrostatic induction is shown in Fig. figure 1 As shown, the rectangular electrostatic sensor array 2 is installed on the rectangular pipe 1; in this implementation case, 6 sets of strip electrodes are used to form the rectangular electrostatic sensor array 2, 3 sets of narrow strip electrodes and 3 sets of wide strip electrodes Three narrow electrode rings and three wide electrode rin...
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A device and method for detecting flow parameters of powder flow in a rectangular tube based on electrostatic induction belongs to the field of parameter detection of gas-solid two-phase flow. The device is composed of a rectangular electrostatic sensor array connected in sequence, a signal conditioning unit, a data fusion unit, and an output display unit; It is composed of strip-shaped electrodes distributed at intervals, and each strip-shaped electrode is insulated from each other. The particles generate static electricity during the flow process. Based on the principle of electrostatic induction, the electrodes induce the induced charges related to the flow state of the particles, which are amplified, filtered, analyzed and processed by the signal conditioning processing unit, and then the data is fused to obtain the whole or partial powder in the rectangular tube. Stream real-time flow parameters. The invention has simple structure, low cost, high resolution, is not easily affected by harsh environments, and can realize real-time detection of flow parameters of the whole or local powder flow in the rectangular tube.
Description
technical field [0001] The invention belongs to the field of parameter detection of gas-solid two-phase flow, in particular to a device and method for detecting flow parameters of powder flow in a rectangular tube based on electrostatic induction. Background technique [0002] Rectangular and square pipes are often used in circulating fluidized bed power plants, some coal-fired power plants, and flue gas discharge systems due to their simple manufacturing process, relatively small actual space occupied by the same cross-sectional area, and easier installation and layout on site. Pneumatic conveying pipelines, powder flow in pneumatic conveying pipelines is a typical gas-solid two-phase flow flow, and the detection of gas-solid two-phase flow parameters in the pipeline is closely related to the economic benefits and safe operation of the enterprise. Rectangular and square cross-section pipes, compared with circular pipes, due to the non-central symmetry and the existence of r...
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IPC IPC(8): G01M10/00
Inventor 闫勇张帅张文彪钱相臣黄孝彬胡永辉刘石
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)