On-line monitoring method of atmospheric particulate concentration

Abstract

The invention discloses an on-line monitoring method of atmospheric particulate concentration. The method comprises the following steps: step one, obtaining the air volume V of certain air space particulates; step two, enabling the particulates with the air volume V to pass an aluminum foil layer arranged at an equal interval, adding voltage to the aluminum foil layer to form capacitance, and measuring capacitance voltage signals U; step three, then computing the number of the particulates with the air volume V through a particle counter; step four, weighing the particulates with the air volume V through a filter membrane weighing method, and measuring the mass M. According to the method, the concentration measurement of the particulates is performed through an interrupted air taking, the number and the weight of the particulates are respectively obtained through the particle counter and the filter membrane weighing method, the density of the particulates is obtained through the weight and the air volume, and the density is compared with the number of the particulates, so that the atmospheric space particulate concentration can be continuously monitored.

Description

technical field [0001] The invention belongs to the technical field of atmospheric particle concentration measurement, in particular to an online monitoring method for atmospheric particle concentration. Background technique [0002] The solid and liquid particles in the air are collectively referred to as air particulate matter (particulate matter). Natural phenomena such as sandstorms, volcanic eruptions, forest fires, and seawater splashes, and the combustion of various fuels (such as coal, liquefied petroleum gas, gas, natural gas, and oil) in human life and production activities are important sources of air particulate matter. [0003] The traditional inhalable particle measurement device based on the β-ray absorption method has the following defects: first, the recovery time requirements for the β-ray monitor are relatively high; second, it is difficult or even impossible to control the impact of the total radiation dose of the β-ray on the surrounding environment, Th...

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Problems solved by technology

[0003] The traditional inhalable particle measurement device based on the β-ray absorption method has the following defects: first, the recovery time requirements for the β-ray monitor are relatively high; second, it is difficult or even impossible to control the impact of the total radiation dose of the β-ray on the surrounding environment, Thereby creating unfavorable hidden dangers for the surrounding technicians and the related environment; thirdly, most of the monitoring equipment for measuring and calculating PM by the β-ray method on the market can only realize automatic measurement for one of PM2. If the synchronous simultaneous measurement of the other is necessary, another set of special measurement mechanism for measuring the concentration of another PM must be installed, which often leads to an excessively large occupied area and cumbersome maintenance operations, which should be done in actual operation. try to avoid

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