Portable oscillation balance method particle standard monitor and monitoring method thereof

Abstract

The invention relates to a portable oscillation balance method particle standard monitor and a monitoring method thereof. The device comprises a divider, a flow divider, a plurality of sample gas dryers and a main machine which are sequentially connected from top to bottom; and the flow diverter is connected with the main machine through a manual sampling and weighing unit, and the main machine is connected with a sucking pump. Therefore, the method has the following advantages: 1) the method is based on the principle of micro-oscillation balance mass measurement; and the micro-oscillation balance method is a classic micro-mass measurement method, is high in detection sensitivity, and is not influenced by the form, density and components of particulate matters; 2) based on a sampling filter membrane volatility compensation technology, through compensation, the influence of sample gas humidity on particulate matter concentration measurement is eliminated; 3) full-time continuous measurement is realized based on a dual-channel time-sharing alternate working mode; and 4) homologous and synchronous manual sampling and weighing can be realized by utilizing an auxiliary flow channel, so that the concentration data measured by the instrument is active, traceable, evidence-documented, evidence-based and more persuasive.

Description

technical field [0001] The invention relates to a monitor and a monitoring method, in particular to a portable vibration balance particle standard monitor and a monitoring method. Background technique [0002] At present, my country has begun to monitor the concentration of particulate matter nationwide. There are nearly 10,000 ambient air automatic monitoring stations. The particulate matter monitoring equipment used is divided into the pump beta ray method and the oscillatory balance method according to the principle; these types of instruments are long-term continuous automatic operation. Due to the influence of environmental factors, sensor signal drift, operation and maintenance, etc., the accuracy of the measurement concentration varies. In order to ensure the accuracy of the measurement of particulate matter in the atmospheric environment of each station, it is necessary to use the classic manual sampling weighing method to The data of the automatic monitor is compared ...

AI Technical Summary

Problems solved by technology

These two methods are methods of indirect quality measurement. Among them, the light scattering method has small volume, light weight, high particle measurement sensitivity and fast response, but it is greatly affected by humidity, particle shape, density and composition, and the accuracy of concentration data is low.

The main principle of the β-ray method is thickness measurement, so it is also greatly affected by humidity, particle shape, density, and composition, and because it uses a radioactive source with radiation, there are also certain safety hazards

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