A light scattering particle (pm2.5/pm10) monitor

Abstract

The invention provides a light-scattering particle (PM 2.5 / PM 10 ) monitor, which solves the problem of deviation in the measurement results due to the small particle size and weak scattering signal in the existing light scattering method. The blower is connected to the drying chamber through the first air inlet pipe, and the first air inlet pipe between the air blower and the drying chamber is equipped with a valve and a flow meter in sequence, and the drying chamber is connected to the upper end of the dispersion chamber through the second air inlet pipe provided with a particle cutting head. The outlet at the lower end of the dispersion chamber is connected to the air inlet at the upper end of the light scattering chamber. There are multiple groups of electrodes evenly distributed around the dispersion chamber, and the electrodes are connected to a negative power supply. The other side end of the scattering cavity is provided with a Forbes lens and a photomultiplier tube in sequence, and the photomultiplier tube is connected to a computer through a data acquisition card, and a discharge needle is provided at the lower end of the air inlet of the light scattering cavity, and the lower end of the discharge needle is The light scattering chamber is provided with an air outlet, and the discharge needle is connected to a positive power supply placed outside the light scattering chamber through a wire.

Description

technical field [0001] The present invention relates to the monitoring of atmospheric particulate matter, especially a kind of light scattering particulate matter (PM 2.5 / PM 10 ) monitor. Background technique [0002] With the continuous development of industry, the situation of air pollution is becoming more and more serious. Atmospheric particulate matter refers to the general term for solid or liquid particulate matter dispersed in the atmosphere, and its particle size ranges from about 0.1 μm to 100 μm. The monitoring range of atmospheric particulate matter mainly includes TSP (Total Suspended Particulate) with an aerodynamic diameter less than or equal to 100 μm, and inhalable particulate matter PM with an aerodynamic diameter less than or equal to 10 μm 10 (Particles with Diameters of 10 μm or less) and fine particulate matter PM with an aerodynamic diameter less than or equal to 2.5 μm 2.5 (Particles with Diameters of 2.5μm or less) Three kinds. Meteorologists a...

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a light-scattering particle (PM 2.5 / PM 10 ) monitor, which effectively solves the problem of deviation in the measurement results due to the small particle size and weak scattering signal in the existing light scattering method

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