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PM10 single-stage atmosphere sampling cutter

An atmospheric sampling and cutter technology, applied in the sampling device and other directions, can solve the problems of small size, inability to achieve particle classification collection, and inability to simultaneously collect gaseous POPs, etc., and achieve the effect of accurate particle size cutting and precise stratification.

Inactive Publication Date: 2014-09-03
FOSHAN ENVIRONMENTAL PROTECTION TECH & EQUIP RES DEV PROFESSIONAL CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MOUDIMMI, Andersen eight-stage impact sampler, and Sioutas Cascade Impactor (SKC), which are commonly used in the world, have a flow rate of only 9L / min-90L / min and a small volume, which is far from meeting the requirements for particle POPs analysis. sample size
In addition, none of these samplers can simultaneously collect gaseous POPs
The more commonly used large-flow samplers in the study of atmospheric POPs, such as Tisch Environmental, Thermo Scientific, and Digitel, can simultaneously collect particulate and gaseous pollutants, but the collected particles are basically total suspended particles (TSP). Classified collection of particulate matter cannot be achieved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In this example, a monodisperse aerosol with specific particle size generated by a monodisperse aerosol generator is selected as a sample, and the sampling flow rate is 300 L / min.

[0040] Table 1

[0041] Particle size (μm) 17 15 13 10 9 7 5 Efficiency n (%) 92.5 83.7 77.2 52.3 41.8 21.3 6.8

[0042] From the test data in Table 1, it can be obtained as Figure 4 shown in the chart.

[0043] Referring to the PM10 sampling technical requirements and detection methods of the State Environmental Protection Administration, the particle capture performance of the sampler has a polynomial regression equation expressed as n=A+Bd p +Cd p 2 +Dd p 3 , the linear regression equation of the capture efficiency can be obtained from the data in Table 1: n=-19.104+1.0189d p +0.9963d p 2 -0.0396d p 3 .

[0044] From this regression equation, it can be found that when n is 50, d 50 =9.89 um, the absolute error with the 10 um actually required...

Embodiment 2

[0046] In this embodiment, the urban area of ​​Guangzhou is used as the experimental area, and the present invention is used to collect volatile organic compounds. After the test of the present invention, the experimental data of the content of volatile organic compounds collected by the gaseous organic pollutant collection layer are shown in Table 2.

[0047]

[0048] According to the inspection data in Table 2, it can be seen that the polyurethane foam (PUF) on the upper layer can effectively adsorb gaseous organic pollutants, while the polyurethane foam (PUF) on the lower layer can further check and re-adsorb gaseous organic pollutants , wherein organic substances such as dihydroacenaphthene, fluorene, anthracene, fluoranthene, benz[a]anthracene, and chrysene have been completely absorbed in the polyurethane foam (PUF) in the upper layer, while acenaphthene, phenanthrene, and pyrene pass through the polyurethane foam (PUF) in the upper layer ( PUF), only a trace amount r...

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Abstract

The invention discloses a PM10 single-stage atmosphere sampling cutter. The PM10 single-stage atmosphere sampling cutter is approximately cylindrical, and comprises a cutting hole cap layer, an impact nozzle layer, an impact plate layer, a filter membrane collection layer, a gaseous organic pollutant collection layer and a gas outlet layer, wherein the cutting hole cap layer, the impact nozzle layer, the impact plate layer, the filter membrane collection layer, the gaseous persistent organic pollutants (POPs) collection layer and the gas outlet layer are sequentially connected in series in a sealed manner; the impact nozzle layer comprises impact nozzles and impact nozzle plates; the impact nozzles are arranged at equal intervals and are vertically inserted into the impact nozzle plates to form a circle; 6 to 8 tubular impact nozzles are arranged; and the impact plate layer is provided with impact plates which are annular grooves. By the PM10 single-stage atmosphere sampling cutter, the characteristic of middle and small flow of the conventional air sampler is broken, the PM10 single-stage atmosphere sampling cutter with a 300L / min flow design standard can meet POPs sampling requirements, the cut particle size is accurate, and target particles are cut by inertial impact force and are accurately layered.

Description

technical field [0001] The invention relates to the field of ambient air collection and monitoring, in particular to a PM10 single-stage air sampling cutter. 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. For a long time, PM10 inhalable particulate matter has been the focus of atmospheric environment monitoring. PM10 refers to particles with an aerodynamic equivalent diameter of ≤10 μm, also known as inhalable particulate matter, which can be inhaled into the human body through the respiratory system and stay in the environment for a long time Longer, and more heavy metals and toxic and harmful substances are adsorbed, which will have an important impact on human health. After being inhaled, respirable particulate matter will accumulate in the respiratory system. PM10 particulate matter is usually deposited in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/22
Inventor 李军张干邹世春
Owner FOSHAN ENVIRONMENTAL PROTECTION TECH & EQUIP RES DEV PROFESSIONAL CENT
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