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Accelerated Diffusion Atmospheric Sampling Device

A technology of atmospheric sampling and sampling box, applied in the direction of sampling device, etc., to achieve the effect of avoiding disturbance, accurate measurement and high sampling efficiency

Inactive Publication Date: 2017-10-03
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of the existing near-surface pollutant measurement methods, the present invention provides an air pollutant sampling device that does not change the micro-environment meteorological conditions, does not disturb the air, and has high sampling efficiency

Method used

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  • Accelerated Diffusion Atmospheric Sampling Device
  • Accelerated Diffusion Atmospheric Sampling Device
  • Accelerated Diffusion Atmospheric Sampling Device

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Embodiment Construction

[0022] The present invention will be further described through examples below in conjunction with the accompanying drawings, but the scope of the present invention is not limited in any way.

[0023] refer to figure 1 , the atmospheric sampling device includes a vacuum pump 1, two collection chambers 3, a sampling box 4, and a plurality of hoses 2 for connecting the vacuum pump 1, the collection chamber 3, and the sampling box 4, thereby jointly forming A gas circuit that can be internally circulated. The air outlet 1a of the vacuum pump 1 is connected to one end of a collection chamber 3 through a flexible pipe 2; the other end of the collection chamber 3 is connected to the inlet pipe 4b of the sampling box 4 through another flexible pipe 2; The air pipe 4a is connected to another collection chamber 3 through a flexible pipe 2; this collection chamber 3 is connected to the air inlet 1b of the vacuum pump 1 through a flexible pipe 2; thereby forming a complete gas circulatio...

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Abstract

The invention discloses a diffusion acceleration type atmosphere sampling device. The diffusion acceleration type atmosphere sampling device comprises a sampling box, a sucking pump, a first collection chamber and a second collection chamber, wherein a gas outlet of the sucking pump is communicated with one end of the first collection chamber and the other end of the first collection chamber is communicated with a gas inlet of the sampling box; the gas outlet of the sampling box is communicated with one end of the second collection chamber; and the other end of the second collection chamber is communicated with the gas inlet of the sucking pump, so as to form a circulating airflow circuit. In a gas sucking process, organic pollutants in circulating gas are collected by sampling media in the collection chambers and the concentration of the pollutants in the gas in the sampling box is relatively low all the time, so that the dispersion of the pollutants in an external environment to the sampling box is accelerated and the aims of accelerating diffusion and improving the sampling efficiency are realized. According to the sampling device disclosed by the invention, the disturbance to environment air caused by an initiative sampling manner is avoided, the efficiency is higher than that of a passive sampling manner, and microclimate conditions of a sampling point are not changed.

Description

technical field [0001] The invention relates to a sampling device for atmospheric volatile and semi-volatile organic pollutants, in particular to a sampling device for collecting pollutants in vertical sections near the ground through accelerated diffusion. Background technique [0002] Quantitative determination of the gas-to-ground exchange process and gas-to-ground exchange flux of gaseous volatile and semi-volatile organic pollutants is an important link to understand their environmental fate and secondary pollution release. However, due to the extremely low concentration of the target pollutants and the interference of multiple factors, characterization is very difficult. The eddy current correlation method currently used for the gas-to-ground exchange of pollutants is not suitable for trace amounts of gaseous organic pollutants due to the inability to carry out on-line quantitative determination. The existing methods include: flux box method, vertical section active s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/24
Inventor 卓少杰钟奇瑞陈源琛潘雪莲杜伟陶澍
Owner PEKING UNIV
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