High altitude airborne X fluorescence real-time analyzer

A real-time analysis and fluorescence technology, applied in the analysis of materials, particle suspension analysis, suspension and porous material analysis, etc., can solve the problems of bulky X-ray fluorescence equipment, and achieve no chemical pollution, low detection limit, and short measurement time Effect

Active Publication Date: 2015-10-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the X-ray fluorescence equipment in the experiment is very heavy. Even a small portable X-ray fluorescence equipment weighs 2-3kg. How to develop X-ray fluorescence equipment with smaller

Method used

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  • High altitude airborne X fluorescence real-time analyzer
  • High altitude airborne X fluorescence real-time analyzer
  • High altitude airborne X fluorescence real-time analyzer

Examples

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Effect test

Example Embodiment

[0031] Example 1

[0032] The isotope X-ray source involved in this embodiment is 238 Pu isotope source, collimator length 1cm, aperture 2mm; sampling membrane aperture 2.5um, diameter 5cm; the distance between isotope source and sampling membrane is 10mm, and the angle is 70 degrees; the miniature silicon drift detector adopts SDD of American amptek company -123 silicon drift detector, weighs about 200g, the miniature digital multi-channel spectrometer adopts the PX6 digital multi-channel spectrometer of American amptek company; the distance between the detection device and the sampling film is 10mm, the angle is 70 degrees; the miniature portable power supply It is a Huawei mobile power bank with a capacity of 5200mAh and a 5V output; the wireless transmission device is Huawei mobile WIFIE5200c; the aluminum alloy box size is 20mm*10mm*7.5mm in length * width * height respectively, thickness is 1mm, weight is about 300g, using screws (M3* 12) Fix the aluminum alloy box with the...

Example Embodiment

[0034] Example 2

[0035] On the basis of Example 1, samples with different sulfur (S) content were configured and burned. The sulfur content was 1.5, 2, 2.5, 3, 3.5, 4, 4.5, and 5 wt%. The high-altitude airborne X The fluorescence real-time analyzer measures the smoke emitted when the sample burns by hovering in the air, the measurement time is 300s, and the detection results are as follows Figure 4 As shown, the X fluorescence of S (K α 2.3 keV) The count has a good linear relationship with the concentration of S, and the linear correlation coefficient R 2 =0.995. This curve can be used to quantitatively analyze the S content in emissions.

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Abstract

The invention relates to a high altitude airborne X fluorescence real-time analyzer, which includes an excitation source, a sampling membrane, a detection device, a power supply, a wireless transmission device, and a processor. Specifically, the excitation source includes a micro-isotope X ray source and a collimator in fixed connection. The rays emitted by the emission source irradiate on the sampling membrane, and are reflected to the detection device. The detection device comprises a micro-silicon drift detector and a micro-digital multichannel spectrometer that are connected in order, and the rays enter the micro-digital multichannel spectrometer through the micro-silicon drift detector. The wireless transmission device sends the information processed by the detection device into the processor, and the power supply provides power to the detection device and the wireless transmission device. The analyzer provided by the invention employs the X fluorescence method to conduct real-time fast detection on heavy metal particle samples at a high altitude sewage outlet by an aircraft, and has the advantages of simple operation, real-time and fast measurement, wide detection range, and low detection limit, and realizes real-time monitoring of high altitude pollutants.

Description

technical field [0001] The invention relates to the field of real-time detection and analysis of high-altitude pollutants, in particular to a high-altitude airborne X-ray fluorescence real-time analyzer. Background technique [0002] my country's smog weather is becoming more and more frequent and severe, and the main root cause is the extensive use of fossil energy. The combustion of a huge amount of coal will produce a large amount of toxic and harmful substances, among which trace heavy metal elements are very harmful to human beings and the environment. The surface of submicron particles is discharged into the atmosphere along with submicron particles, and exists in the form of aerosol for a long time, which is not easy to settle, which not only affects the visibility of the atmosphere, but also makes people and other organisms harmed by heavy metals. These burned pollutants are basically discharged to the high altitude through the chimney. If the high-altitude sewage o...

Claims

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Application Information

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IPC IPC(8): G01N15/06G01N23/223
Inventor 张焱贾文宝张新磊单卿陈达
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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