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Miniature onboard cloud droplet sampling system and working method thereof

A sampling system and minicomputer technology, applied in sampling devices and other directions, can solve the problems of high purchase cost, large volume of aeronautical atmospheric observation samplers, hindering research development, etc., and achieve convenient processing, improved feasibility and practicability, and convenient use. Effect

Inactive Publication Date: 2013-01-16
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the air pollutant airborne atmospheric observation samplers used are relatively large in size, expensive to purchase, and all of them are imported from abroad, which has great problems in the operation process, after-sales installation, technical training and maintenance. To a certain extent, it hinders the development of relevant research in China

Method used

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  • Miniature onboard cloud droplet sampling system and working method thereof
  • Miniature onboard cloud droplet sampling system and working method thereof
  • Miniature onboard cloud droplet sampling system and working method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as Figure 1-3 shown.

[0035] A small airborne cloud droplet sampling system, comprising a gas compression pump 15, a dryer 16, a filter 17, a mass flow controller 18, a small airborne cloud droplet sampling device 19, and a flow diversion device 20 sequentially connected in accordance with the direction of the sampling airflow , sampling membrane 21, drier 22, filter 23, mass flow controller 24 and air pump 25;

[0036] Described small-sized airborne cloud drop sampling device comprises air inlet chamber 1 and collection chamber 2, and described collection chamber 2 is arranged on the inside of air inlet chamber 1; The front end of described air inlet chamber 1 and the outer edge of the sampling end of collection chamber connected, the front end of the air inlet chamber 1 is tapered, and the tail of the air inlet chamber 1 is provided with an air inlet pipe 3; the collection chamber 2 includes a tubular sampling end 4, a preheating chamber 5 and a pipe shaped c...

Embodiment 2

[0040] A kind of method that utilizes the collection cloud droplet of system as described in embodiment 1, comprises steps as follows:

[0041] (1) After the plane takes off, first turn on the heating device and preheat the preheating chamber to 48-52°C;

[0042] (2) After flying to the target collection airspace, turn on the gas compression pump and air extraction pump at the same time;

[0043] (3) The sampled gas enters the intake cavity along the intake pipe;

[0044] (4) The sampling gas in the intake chamber enters the collection chamber along the micropores on the tubular sampling end, the flow rate F1 of the intake pipe is greater than the flow rate F2 of the exhaust pipe, and the sampling gas entering from the intake pipe passes through the tube with micropores It is divided into two channels of sampling gas when the sampling end is shaped: one of the sampling gas A has the same flow rate F2 and the same direction as the sampling gas of the extraction pipe, and the o...

Embodiment 3

[0052] Cloud droplet sampling system as described in embodiment 1, its difference is,

[0053] The length of the tubular sampling end 4: 8mm, the diameter of the tubular sampling end: 1.5mm; there are multiple circles of microholes around the tubular sampling end, the number of micropores in each circle is 6, and the interval between adjacent circles is 1.5 mm. mm; the diameter of the micropore: 10 μm; the diameter of the preheating cavity: 4 mm; the diameter range of the air inlet cavity: 18 mm. The tubular capturing end is at an angle of 25° counterclockwise to the horizontal.

[0054] The particle size range of the aerosol particles or cloud droplets collected by the cloud droplet sampling device described in this embodiment is between 5-10 μm, which meets the experimental requirements for selectively collecting large aerosol particles or cloud droplets.

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Abstract

The invention relates to a miniature onboard cloud droplet sampling system. The system comprises a gas compression pump (15), a dryer (16), a filter (17), a mass flow controller (18), a miniature onboard cloud droplet sampling device (19), a flow division device (20), a sampling membrane (21), a dryer (22), a filter (23), a mass flow controller (24) and an extraction pump (25), which are sequentially connected according to an airflow sampling direction. The miniature onboard cloud droplet sampling device comprises an air inlet cavity and a collection cavity, wherein the collection cavity is formed in the air inlet cavity; the front end of the air inlet cavity is connected with the outer edge of the sampling end of the collection cavity; an air inlet pipe is arranged on the tail part of the air inlet cavity; the collection cavity comprises the tubular sampling end, a preheating cavity body and a tubular capturing end, which are sequentially connected; and a through micropore is formed on the tube wall of the tubular sampling end. The sampling system can be special for collecting aerosol particles or cloud droplets with large particle sizes.

Description

technical field [0001] The invention relates to a small-sized airborne cloud drop sampling system and a working method thereof, belonging to the technical field of atmospheric cloud physical and chemical sampling equipment and analysis. Background technique [0002] With the decline of air quality and the development of aviation technology, researchers at home and abroad have started to study the method of atmospheric sampling on airplanes—aero-sampling technology since the mid-1980s. The application of aerial sampling technology is conducive to understanding the air quality conditions at high altitudes and then studying the causes of air pollution. At present, a large number of studies have shown that aerosol particles emitted by a large number of industrial and urban pollution sources can affect the formation and lifespan of clouds. Due to the limitations of current sampling techniques, most of these problems are speculated through satellite observation data. However, sat...

Claims

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Application Information

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IPC IPC(8): G01N1/22
Inventor 陈建民李卫军刘磊赵立宁朱超刘澎
Owner SHANDONG UNIV
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