Dust haze component on-line monitoring device

Abstract

The invention relates to a dust haze component on-line monitoring device; the dust haze component on-line monitoring device comprises a dust haze collection unit, a signal excitation unit, a signal collection unit, a dust haze state monitoring unit and a computer; the dust haze collection unit comprises a dust haze collection cavity, a particle size selector, a potential well laser, a combination lens with beam expanding and collimation functions, a light chopper, a high power focusing lens, an airflow constraint instrument, a sheath flow pipe and an air extracting pump; the signal excitation unit comprises a pulse laser, a first connecting fiber and an excitation beam focusing probe; the signal collection unit comprises a signal collecting probe, a second connecting fiber and a spectrometer; and the dust haze state monitoring unit comprises a dust haze state monitoring probe, a CCD (charge coupled device) detector and a USB connecting line. The dust haze component on-line monitoring device can monitor in real time dust haze components in air, and has the characteristics of fast response speed, simultaneous analysis of a plurality of components, non-contact measuring and the like.

Description

technical field [0001] The invention relates to an online monitoring device for haze components, which belongs to the field of air quality monitoring. technical background [0002] PM2.5, also known as particulate matter that can enter the lungs, refers to particulate matter with a diameter less than or equal to 2.5 microns in the atmosphere, mainly derived from the residues emitted during the combustion process. During the breathing process, fine particles with a diameter of less than 2.5 microns are not easily blocked. After being inhaled into the human body, they will directly enter the bronchi, interfere with the gas exchange in the lungs, and cause various diseases. These particles can also enter the blood through the bronchi and alveoli, and the harmful gases and heavy metals in them are dissolved in the blood, which is more harmful to human health. In recent years, my country has paid more and more attention to air quality. Since 2012, key areas such as the Beijing-T...

AI Technical Summary

Problems solved by technology

Taking the time-of-flight mass spectrometer as an example, its further qualitative capabilities are limited due to the lack of tandem function

[0004] In summary, the existing technologies cannot be used for real-time online monitoring of haze components due to long analysis period, poor time resolution, or insufficient qualitative analysis capabilities.

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