Device for automatically determining mass concentration of double-channel particulate matters

Abstract

The invention discloses a device for automatically determining the mass concentration of double-channel particulate matters. A particulate matter separation and sampling module is connected with a gas sample humidity control module; a gas outlet of the gas sample humidity control module is connected with a double-channel sampling detection module; two paths of gas outlets of the double-channel sampling detection module are connected with two-path constant-flow regulation module respectively; a gas outlet of the two-path constant-flow regulation module is connected with a sampling pump through a three-way valve. The device provided by the invention can determine the mass concentrations of PM10 particulate matters and PM2.5 particulate matters in atmospheric environment at the same time, has the advantages of simple structure, low maintenance cost, long running period, rapidness and accuracy in data and actual realization on online automatic continuous monitoring, truly realizes the effect that double-channel continuous online sampling process can be finished with only one beta-ray detection device and one beta-ray source and has the remarkably advantages of simple structure, low maintenance cost, long running period, rapidness and accuracy in data, reduction in instrument cost and later maintenance cost and actual realization on online automatic continuous monitoring.

Description

technical field [0001] The invention belongs to the technical field of atmospheric automatic monitoring equipment, and in particular relates to a device for automatically measuring the mass concentration of dual-channel particulate matter. Background technique [0002] The atmospheric environment has a vital impact on people's life and health, so the monitoring of particulate matter in the atmospheric environment is also particularly important. 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). PM10 and PM2.5 refer to atmospheric particles with aerodynamic diameters less than or equal to 10 μm and 2.5 μm, respectively. PM10 is also called inhalable particulate matter, and the World Health Organization (WHO) refers to it as particulate matter that can enter the ches...

AI Technical Summary

Problems solved by technology

At present, most of the automatic monitoring instruments on the market are single-channel particle monitors, which can only measure one parameter of PM10 or PM2.5. Two instruments are required to measure two parameters, which occupy a large area, cost high, and require a lot of maintenance. inconvenient

Although there are also related dual-channel particle automatic detection devices in the prior art, there are still relatively large defects in this type of product in actual use, and there are the following technical problems: (1) due to the relative cost of the β-ray detector and the β-radiation source Higher, use at the same time on the same machine will inevitably increase the input cost of the equipment:; (2) because the beta radiation source is radioactive, its measurement rays will pollute the environment for a long time, and it will take about 5730 years to really decompose; (3) due to the beta radiation Detectors and beta radiation sources need to be calibrated and cleaned regularly, which relatively brings relatively high equipment maintenance costs

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