Wireless measuring device and method for measuring dynamic parameters of non-spherical particles in three-dimensional dense gas-solid system

A technology of non-spherical particles and dynamic parameters, which is applied in the field of multiphase flow measurement, and can solve problems such as inability to realize three-dimensional full-field measurement and disturbing flow field

Inactive Publication Date: 2014-11-19
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: The present invention aims at the problems that the conventional particle position measurement method can only obtain apparent particle motion information, some measurement methods have safety problems, the conventional collision force measurement device will interfere with the flow field, and cannot realize three-dimensional full-field measurement, etc., and provides A wireless measurement device and method for the dynamic parameters of non-spherical particles in a three-dimensional dense gas-solid system

Method used

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  • Wireless measuring device and method for measuring dynamic parameters of non-spherical particles in three-dimensional dense gas-solid system
  • Wireless measuring device and method for measuring dynamic parameters of non-spherical particles in three-dimensional dense gas-solid system

Examples

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Embodiment 1

[0035] In this implementation, an experimental device is designed for the pyrolysis process of solid waste in a rotary kiln, which is used to measure the position change and impact force of solid waste under different operating parameters. The specific implementation steps are as follows:

[0036] (1) Prepare the experimental device and experimental materials. Take the rotary kiln (three-dimensional dense gas-solid system) as the experimental device, with a diameter of 500mm and a length of 1500mm. Experimental materials include spherical heat carriers and non-spherical materials. Quartz sand is used as heat carrier, and various solid wastes of different shapes are used as materials. A regular cylindrical material is selected from the non-spherical granular material to be detected, and the average diameter of the cylindrical material is 16 mm, and the average height is 48 mm.

[0037] (2) Make tracer particles. The shell and the core channel are respectively made of glass, ...

Embodiment 2

[0042] In this implementation, the experimental device is designed for the biomass fluidized bed combustion boiler, which is used to measure the collision force and corresponding position of the biomass particles during the fluidization process. The specific implementation steps are as follows:

[0043] (1) Prepare the experimental device and experimental materials. Take the fluidized bed (three-dimensional dense gas-solid system) as the experimental device, the cross-sectional area of ​​the bed is 400mm×400mm, and the height is 2000mm. Experimental materials include spherical fluidized media and non-spherical materials. Quartz sand is used as the fluidized medium, and biomass straw particles of various shapes are used as materials. A regular cylindrical material is selected from the non-spherical granular material to be detected, and the average diameter of the cylindrical material is 15 mm, and the average height is 42 mm.

[0044] (2) Make tracer particles. The shell and...

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Abstract

The invention discloses a wireless measuring device for measuring the dynamic parameters of non-spherical particles in a three-dimensional dense gas-solid system. The device comprises tracing particles, a microwave heating unit, a wireless signal receiving unit, and a data processing unit. A pressure measuring function, a temperature measuring function, and a wireless signal emitting functions are integrated into the tracing particles, the tracing particles are placed in a three-dimensional dense gas-solid system, and the shape and size of the tracing particles are similar to those of the non-spherical particles in the system. When the device is applied to measurement, the microwave heating unit can carry out oriented heating on the heat receptors in the tracing particles, an infrared sensor can obtain the temperature signals through infrared ray sensing, at the same time a thin film pressure sensor can directly measure the collision force on the particles; finally the temperature and force-bearing signals are transmitted to a wireless signal receiving system out of the system through a wireless mode, and the collision force and position information is obtained through data comparison. The provided measuring method and device is capable of measuring the parameters of position and collision force of moving particles in a three-dimensional dense gas-solid system, and have the advantages of no interference on flow field and realtime on-line measurement.

Description

technical field [0001] The invention belongs to the technical field of multiphase flow measurement, and in particular relates to a wireless measurement method and device for dynamic parameters of non-spherical particles in a three-dimensional dense gas-solid system. Background technique [0002] Dense gas-solid systems are widely used in industrial production, especially in the fields of chemical industry and energy power. In these application processes, solid materials contain not only spherical particles but also non-spherical particles, such as solid waste rotary kiln combustion gasification, biomass straw fluidized bed combustion, spherical / non-spherical particle mixture fluidized separation, etc. Obviously, whether it is a physical treatment process or a chemical reaction process, the mass transfer, heat transfer and momentum transfer between materials are extremely important, which directly affects the process efficiency and product quality. Measuring particle kinetic...

Claims

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Application Information

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IPC IPC(8): G01N15/00
Inventor 张勇钟文琪金保昇郑昕
Owner SOUTHEAST UNIV
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