Atmosphere suspended particulate matter mass concentration detector

Abstract

The invention relates to an atmosphere suspended particulate matter mass concentration detector based on the national environmental protection HJ618-2011 standard, wherein the atmosphere suspended particulate matter mass concentration detector is suitable for detection of mass concentration of particulate matters from PM2.5 to less than PM 10 in an air environment. In the prior art, PM2.5 fine particles are difficultly interdicted on filtration membranes with the existing quartz, mixed cellulose and other organic filtration membranes; and the oscillation frequency of the existing electronic oscillation balance method is affected by excessive thick dust accumulation, and the filtration membrane weight method has disadvantages of complex operation and difficult calibration accuracy. According to the present invention, based on the aerosol characteristic of the less than PM 10 particulate matters, particularly the PM2.5 fine particulate matters in the ambient air, a suitable microgram scale of a beta-source with a nickel-63 low-energy short-range is selected, the ionization energy absorption principle can be completed provided when the electron is loaded, and the atomic nucleus electron of the dust matter is fixed; and compared with the manual filtration membrane weight method, the method of the present invention can achieve the high accuracy requirement.

Description

Technical field: [0001] The present invention is based on national environmental protection HJ618-2011, HJ / 93, HJ / T194-2005 standards. Combined with the characteristics of nickel-63 low-energy β source in the national isotope management regulations, it is also a non-strictly managed jurisdiction-exempt product. It is especially suitable for the determination of the mass concentration of suspended particulate matter in the atmosphere, that is, the determination of the mass concentration of dust with fine particle sizes below PM10 in ambient air. Background technique: [0002] At home and abroad, the mass concentration of smoke and suspended dust has always been measured by the filter membrane gravimetric method. The equipment is complicated and heavy, the operation is cumbersome, the working condition is lagging, and the accuracy is not high. Especially for PM2.5 and below, it is worth discussing. It is known that the smoke from hookah pipes in the Qing Dynasty in my country...

AI Technical Summary

Problems solved by technology

[0002] At home and abroad, the mass concentration of smoke and suspended dust has always been measured by the filter membrane gravimetric method. The equipment is complicated and heavy, the operation is cumbersome, the working condition is lagging, and the accuracy is not high

Especially for PM2.5 and below, it is worth discussing. It is known that the smoke from hookah pipes in the Qing Dynasty in my country was filtered by water and inhaled into the lungs. It can be seen that it is difficult for general filter materials to block PM2.5 below, especially the measured particles with a unit of 0.1μ Even the new quartz filter membrane, mixed cellulose and other organic filter membranes, it is difficult to ensure that 99% of them are blocked on the filter membrane

In addition, β rays replace the filter membrane before and after the balance to irradiate the dust collection to calculate the dust concentration, which still has low accuracy and troublesome operation

In addition, the electronic oscillation balance method, that is, the uneven surface of the dust accumulation balance affects the actual oscillation frequency, and there are problems such as how to calibrate the accuracy of the filter membrane weighing method.

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