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Constant-temperature rapid air sampling device and using method thereof

An air sampling and constant temperature technology, applied in the direction of sampling devices, etc., can solve problems such as inability to accurately reflect the real situation, and achieve the effects of effective sampling, reducing system errors, and short gas collection time.

Active Publication Date: 2015-02-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually select another sampling point or remove this sampling point, so that it cannot accurately reflect the real situation
Therefore, effective sampling of air pollutants that cannot meet the sampling time has become a current technical problem

Method used

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  • Constant-temperature rapid air sampling device and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Sampling is carried out in order to measure the VOCs in the air in a subway car that does not last a long time in a certain state.

[0023] Such as figure 1 As shown, a constant temperature and rapid air sampling device, its structure includes: a particle filter 1, a first valve switch 2-1, a second valve switch 2-2, a third valve switch 2-3, a fourth valve switch 2 -4, fifth valve switch 2-5, heat insulation shell 3, pressure gauge 4, temperature sensor 5, heating wire 6, air collection bag 7, metal box 8, flexible hose 9, upper sampling pipe interface 10-1, lower Sampling pipe interface 10-2, retractable flexible hose 11, flow meter 12, sampling pump 13 and parameter setting table 14. There is a metal box 8 on the periphery of the air-collecting bag 7 made of heat-conducting material, and the volume ratio to the air-collecting bag 7 is 5:4. The heating wire 6 is evenly wound on the outer wall of the metal box 8. The diameter of the gas-collecting port c...

Embodiment 2

[0025] Example 2: To study the relationship between traffic volume and BTEX exposure of pedestrians on sidewalks.

[0026] as attached figure 1As shown, a constant temperature and fast air sampling device, its structure includes: particulate matter filter 1 first valve switch 2-1, second valve switch 2-2, third valve switch 2-3, fourth valve switch 2- 4. Fifth valve switch 2-5, heat insulation shell 3, pressure gauge 4, temperature sensor 5, heating wire 6, air collection bag 7, metal box 8, flexible hose 9, upper sampling pipe interface 10-1, lower Sampling pipe interface 10-2, retractable flexible hose 11, flow meter 12, sampling pump 13 and parameter setting table 14.

[0027] In order to measure the BTEX in the air around the sidewalk in the actual working conditions where the traffic flow changes rapidly, effective sampling is carried out. First, measure the temperature of the air around the sidewalk, simulate the same environment in the metal box of the sampler, and au...

Embodiment 3

[0028] Example 3: VOCs monitoring is carried out on the high-temperature flue gas discharged from the high chimney of a certain factory.

[0029] as attached figure 1 As shown, a constant temperature and rapid air sampling device, its structure includes: a particle filter 1, a first valve switch 2-1, a second valve switch 2-2, a third valve switch 2-3, and a fourth valve switch 2 -4, the fifth valve switch 2-5, heat insulation shell 3, pressure gauge 4, temperature sensor 5, heating wire 6, air collection bag 7, metal box 8, flexible hose 9, upper sampling pipe interface 10-1, Lower sampling pipe interface 10-2, retractable flexible hose 11, flow meter 12, sampling pump 13 and parameter setting table 14.

[0030] In order to effectively monitor VOCs in the high-temperature flue gas emitted by a high chimney in a factory. First measure the temperature of the flue gas 66 0 C, through the temperature sensor 5, the circuit path of the heating wire 6 is automatically controlled,...

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Abstract

The invention relates to a constant-temperature rapid air sampling device and a using method thereof. The device disclosed by the invention is divided into three systems, namely an air buffering system, a high-efficiency sampling system and an automatic control system, wherein the air buffering system consists of a first valve switch, a second valve switch, a third valve switch, a fourth valve switch, a fifth valve switch, a heat insulation shell, a metal box, a particulate filter and a gas collection bag; the high-efficiency sampling system consists of a fourth valve switch, a telescopic flexible adapter tube, an embedded sampling pipe joint, a flexible hose and a sampling pump; and the automatic control system consists of a pressure meter, a temperature sensor, a heating wire, a flowmeter and a parameter setting meter. The device disclosed by the invention is advanced and reasonable in design structure and easy and rapid to operate, automatic control is realized, and rapid gas collection and high-efficiency sampling can be realized.

Description

technical field [0001] The invention relates to an air sampling device, in particular to a constant temperature and rapid air sampling device and a using method thereof. Background technique [0002] In recent years, the quality of atmospheric environment has received more and more attention. Sampling instruments for collecting the atmospheric environment are becoming more and more common, portable and sophisticated. The concentration of pollutants in the atmosphere is generally relatively low (ppm-ppb order of magnitude), and the direct sampling method often cannot meet the requirements of the detection limit of the analysis method. Therefore, it is necessary to use the enrichment sampling method to concentrate the pollutants in the atmosphere. However, in some special sampling environments in the air, the air state can only be maintained for a short period of time. For the adsorbent (or absorption night) of the enrichment sampling method, it often requires low-flow and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24
Inventor 徐斌陈玲龚宇吴娅
Owner TONGJI UNIV