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A device for measuring high-temperature thermal radiation characteristics of solid particles

A solid particle and measuring device technology, applied in the direction of measuring devices, particle and sedimentation analysis, instruments, etc., to achieve the effects of convenient measurement, weakening pollution, and adjustable geometric thickness

Active Publication Date: 2019-04-09
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Mix solid particles and particles with high transmittance to form compressed tablets or uniformly disperse solid particles into liquid to form a suspension, and then measure the compressed tablet or suspension to obtain a particle system. The measurement method is not suitable for high-temperature solid particles It is a feasible and accurate method to measure the high-temperature thermal radiation characteristics of the particle system by dispersing solid particles into the gas to form a suspended particle system, and then measuring the heated particle system. Lack of an effective and easy-to-operate measurement device for high-temperature thermal radiation characteristics of solid particles

Method used

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  • A device for measuring high-temperature thermal radiation characteristics of solid particles
  • A device for measuring high-temperature thermal radiation characteristics of solid particles
  • A device for measuring high-temperature thermal radiation characteristics of solid particles

Examples

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Embodiment 1

[0036] A device for measuring high-temperature thermal radiation characteristics of solid particles, such as Figure 1-4 As shown, it consists of a particle dispersion unit 1, a heating unit 2, a measurement unit 3 and a particle collection unit 4 connected in sequence.

[0037] Particle dispersing unit 1 comprises valve 5, flow meter 11, feed bin 12 and mixer 14 connected in sequence, and feed bin 14 is provided with motor 13, and motor 13 drives the impeller in feed bin 12 to rotate, will enter the compression of feed bin 12 The gas forms a powder-containing airflow, and the powder-containing airflow passes through the mixer 14, is mixed with another stream of compressed gas entering the mixer 14, and then sent to the heating unit 2;

[0038] The heating unit 2 includes a heating furnace 21, a heating chamber 22 is arranged in the heating furnace 21, the heating chamber 22 is cylindrical, the inlet and outlet of the heating chamber 22 are conical, and a heating element 23 is...

Embodiment 2

[0044] In this embodiment, an interferometer-type spectrometer is used to measure the transmittance, and the schematic diagram is as follows Figure 6 As shown, the measurement method using an interferometric spectrometer is similar to that of Example 1. The main difference is that the optical detection part system and measurement steps are different. The outgoing light of the infrared radiation source enters the port 1 of the detection head after passing through the aperture, and the port 3 is connected with the Fourier transform infrared spectrometer. Since the thermal radiation of the measurement unit and the high-temperature air flow also enters the infrared spectrometer, the background signal generated by the thermal radiation of the measurement unit needs to be deducted in the actual measurement.

[0045] First measure the signal value of the light passing through the pure gas. Close the diaphragm, close the motor 13 and the valve 5 of the compressed gas, another strea...

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Abstract

The invention relates to a device for measuring high-temperature heat radiation characteristics of a solid particle system. The device comprises a particle dispersing unit, a heating unit, a measuring unit and a particle collecting unit which are connected in order. The heating unit comprises a heating furnace. A heating cavity is disposed in the heating furnace. The measuring unit comprises a middle vertical pipe measuring cavity and a cross four-way pipe. Each end port of the four-way pipe is provided with an optical measuring element. The lower end of the vertical pipe measuring cavity is connected to the outlet of the heating cavity. The heating unit and the measuring unit are provided with temperature measuring elements. During measurement, the particle dispersing unit forms a powder-containing air flow, and the powder-containing air flow is heated by the heating cavity in the heating unit, fed into the vertical pipe measuring cavity, detected, processed by the particle collecting unit and finally discharged. Through dispersing solid particles into air to form a suspended particle system, heating the system and measuring, the high-temperature heat radiation characteristics of the particle system can be measured conveniently by the device, and therefore the device is an effective and convenient device for measuring the high-temperature heat radiation characteristics of the particle system.

Description

technical field [0001] The invention relates to a measuring device, in particular to a measuring device for high-temperature heat radiation characteristics of solid particles. Background technique [0002] The thermal radiation characteristics of solid particles are of great significance in many fields. In many engineering applications and natural phenomena, the radiation properties (absorption, transmission, reflection, scattering, emission, etc.) of solid particle systems play an important role in the energy transfer process. For example, in addition to the high-temperature flue gas participating in radiation heat transfer in a coal-fired boiler, the suspended particles dispersed in the furnace (including coke or carbon black particles produced in the early stage of pulverized coal combustion and fly ash produced after burning out) have an important effect on radiation heat transfer. have an important role. Among them, the radiation of coke particles accounts for 25%-30%...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/00
CPCG01N15/00G01N2015/03
Inventor 朱群志李彦李斌段芮姚博伟贺会强
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER