Automatic two-channel atmospheric particulate monitoring device

Abstract

The invention provides an automatic two-channel atmospheric particulate monitoring device, belongs to the technical field of atmosphere monitoring devices and is used for simultaneously monitoring PM2.5 concentration and PM10 concentration in atmosphere. The technical scheme is that a cutting device of a particulate separating and sampling module of the device is connected with two sampling tubes, the two sampling tubes are connected with two detecting channels of a two-channel dust sample detecting module, a filter paper band penetrates between a detector and a radioactive source, a plurality of sensors and an adjusting valve of a two-channel constant-current control module are connected on a pipeline at the rear portion of an air outlet pipe of the two-channel dust sample detecting module, and the adjusting valve is connected with a sampling pump. The automatic two-channel atmospheric particulate monitoring device can finish an automatic atmospheric particulate detection task, can simultaneously measure PM10 particulate concentration and PM2.5 particulate concentration and achieve continuous, on-line, real-time and automatic detection, has the remarkable advantages of being simple in structure, long in operation period, convenient to maintain, quick and accurate in data detection and capable of performing real-time transmission and control together with a central control station, and has high economic benefit and social benefit.

Description

technical field [0001] The invention relates to an automatic monitoring device for atmospheric particulate matter, in particular to a device capable of simultaneously monitoring PM 2.5 and PM 10 The continuous on-line monitoring device belongs to the technical field of atmospheric automatic monitoring equipment. technical background [0002] Atmospheric particulate matter is a general term for solid or liquid particulate matter dispersed in the atmosphere. Atmospheric particulate matter with a particle size of 0.01 μm to 100 μm is collectively referred to as total suspended particulate matter (TSP). while PM 10 and PM 2.5 They refer to atmospheric particles with aerodynamic diameters less than or equal to 10 μm and 2.5 μm, respectively. PM 10 Also known as inhalable particulate matter, the World Health Organization (WHO) refers to it as particulate matter that can enter the chest; PM 2.5 Particulate matter that can enter the alveoli of the human body is called lun...

AI Technical Summary

Problems solved by technology

[0005] At present, most of the automatic monitoring instruments on the market are single-channel particle monitors, which can only realize PM 10 or PM 2.5 For the measurement of one parameter, two instruments are required to measure two parameters, which takes up a large area, high cost, large maintenance, and inconvenient to use

[0006] The 1405D dual-channel particulate matter monitor produced by Thermo Scientific Company of the United States can monitor PM at the same time. 2.5 and PM 10 , but its measurement system requires working at a constant temperature of 50°C, and some volatile organic compounds in the sample gas are easy to volatilize, so the measured data is low. In addition, negative values ​​are easy to appear in rainy days with high humidity

And its maintenance is large, the cost is high

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