Method and apparatus for measuring charge distribution of pneumatic conveying two-phase flow particles

A measurement method and pneumatic conveying technology, applied in the direction of measuring devices, measuring electrical variables, particle suspension analysis, etc., can solve problems such as low inversion accuracy, less effective information, and single sensing mechanism, and achieve the effect of breaking through technical bottlenecks

Pending Publication Date: 2018-08-14
YANGZHOU UNIV
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Problems solved by technology

The current EST technology has not made substantial progress in practical applications. There are two main reasons: one is that EST uses passive electrostatic sensors, the sensing mechanism is single, and the effective information obtained is less, resulting in low resolution of charge distribution measurement and negative feedback. Second, the induced charge on the EST sensor probe depends not only on the charge amount of the cha...

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  • Method and apparatus for measuring charge distribution of pneumatic conveying two-phase flow particles
  • Method and apparatus for measuring charge distribution of pneumatic conveying two-phase flow particles
  • Method and apparatus for measuring charge distribution of pneumatic conveying two-phase flow particles

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Embodiment Construction

[0032] A pneumatically conveyed two-phase flow particle charge distribution measurement device based on an electrostatic coupling capacitor dual-mode multiplexing sensor, mainly including an electrostatic coupling capacitor dual-mode multiplexing sensor 1, an electrostatic and capacitive signal separation and acquisition module 2, and a concentration distribution measurement module 3. Velocity distribution measurement module 4 and imaging computer 5, such as figure 1 shown.

[0033] Electrostatic coupling capacitive dual-mode multiplexing sensors such as figure 2 , image 3 As shown, it includes 16 electrostatic-capacitance dual-mode multiplexing arc detection electrodes and 8 capacitive excitation electrodes; the 16 electrostatic-capacitance dual-mode multiplexing arc-shaped detection electrodes are respectively S 11 , S 12 , S 13 , S 14 , S 15 , S 16 , S 17 , S 18 , S 21 , S 22 , S 23 , S 24 , S 25 , S 26 , S 27 , S 28 ; 8 capacitive excitation electrodes a...

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Abstract

The invention belongs to the technical field of gas-solid two-phase flow detection. It is a method for measuring particle charge distribution in two-phase flow in pneumatic conveying. Combining the projection data from the electrostatic signal of the sensor, the prior information from the distribution of particle medium and velocity with the dynamic space charge sensitivity of the sensor, the particle charge distribution is retrieved by the image reconstruction algorithm. The invention also discloses a corresponding measuring apparatus. According to the particle charge distribution measurementmethod provided by the method, the problems existing in the current particle charge distribution measurement are effectively solved, and the effective measurement of the particle charge distributioncan be realized. The method and apparatus for measuring charge distribution of pneumatic conveying two-phase flow particles has the advantages that the charge distribution of the two-phase flow particle of the pneumatic conveying can be effectively measured in real time. The method and apparatus for measuring charge distribution of pneumatic conveying two-phase flow particles provides a basic measurement method and a method for exploring the basic flow characteristics of the gas-solid two-phase flow, monitoring the industrial production process and preventing the electrostatic hazards.

Description

technical field [0001] The invention belongs to the technical field of gas-solid two-phase flow flow detection, and in particular relates to a charging measurement method and a measurement device for pneumatically transported two-phase flow particles. Background technique [0002] Pneumatic conveying system is widely used in electric power, chemical industry, pharmaceutical, metallurgy and other fields. In the process of pneumatic conveying, the phenomenon of particle charging is ubiquitous. Achieving real-time and accurate measurement of particle charge can effectively prevent various types of electrostatic discharges in the process of pneumatic conveying and accidents such as fires and explosions caused by them. The research on the charging detection method and technology of pneumatically conveyed two-phase flow particles has important scientific significance and industrial application value. [0003] There are two main methods for measuring the charge of particles in pn...

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Application Information

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IPC IPC(8): G01R29/24G01N15/00G01N15/06
CPCG01N15/00G01N15/0656G01R29/24G01N2015/0003
Inventor 王胜南许传龙李健
Owner YANGZHOU UNIV
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