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Device and method for accurate negative pressure humidification of atmospheric vocs sampling tank

A sampling tank and negative pressure technology, which is applied in the field of precise negative pressure humidification devices for atmospheric VOCs sampling tanks, can solve the problems of VOCs component analysis deviation, humidity mismatch, etc., solve the problem of humidification expansion, low cost, convenient and fast humidification Process effect

Active Publication Date: 2021-05-18
CHENGDU ACADEMY OF ENVIRONMENTAL SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The present invention aims to provide a device and method for accurate negative pressure humidification of atmospheric VOCs sampling tanks, which can conveniently and quickly carry out the humidification process without destroying the vacuum degree in the sampling tank, and solve the problem of dry air in the process of monitoring and analyzing ambient air VOCs. The humidity of the standard gas does not match the actual one, which causes the problem of deviation in the analysis of VOCs components such as aldehydes and ketones that are easily soluble in water, and also solves the problem of humidification and expansion of dry standard gas by traditional dynamic diluters

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  • Device and method for accurate negative pressure humidification of atmospheric vocs sampling tank

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] Such as figure 1 As shown, the present invention provides a device for accurate negative pressure humidification of atmospheric VOCs sampling tanks, including a tube body 3, the upper end of the tube body 3 is provided with a sealing sleeve 4, and the lower end of the tube body 3 is provided with a A pipe body ferrule 5, and a connecting nut 6 is sheathed on the outer side of the pipe body ferrule 5.

[0030] The tube ferrule 5 is equivalent to a sealing ring, and the size of the connecting nut 6 matches the size of the connecting tube of the sampling tank to be connected.

[0031] Also includes a pressure gauge 1, the pressure gauge 1 is fixedly connected to the pipe body 3 through the pressure gauge nut 2, the pressure gauge is positive and negative vacu...

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Abstract

The invention discloses a device and method for accurate negative pressure humidification of atmospheric VOCs sampling tanks, which can conveniently and quickly perform the humidification process without destroying the vacuum degree in the sampling tank, and solve the dry standard in the process of ambient air VOCs monitoring and analysis. The gas humidity does not match the actual situation, which causes the problem of deviation in the analysis of VOCs components that are easily soluble in water such as aldehydes and ketones, and also solves the problem of humidification expansion of dry standard gases by traditional dynamic diluters.

Description

technical field [0001] The invention relates to the technical field of air detection, in particular to a device and method for accurate negative pressure humidification of atmospheric VOCs sampling tanks. Background technique [0002] As humans pay more and more attention to the problem of atmospheric environmental pollution, smog and ozone problems have gradually entered the public's attention. Scholars from all over the world have pointed out through a large number of studies that atmospheric volatile organic compounds (VOCs) are not only deeply involved in atmospheric photochemical reactions to generate strong oxidative secondary products—ozone, but also one of the important precursors of secondary organic aerosols (SOA) . The former is one of the most important culprits of photochemical pollution, and the latter is one of the most important components of smog. Therefore, the study of atmospheric VOCs is the key to solving the problem of air pollution. Although there a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 刘合凡宋丹林陆成伟谭钦文邓也张鑫周子航黄凤霞杨欣悦张恬月冯淼胡翔吴柯颖陈燕王成辉
Owner CHENGDU ACADEMY OF ENVIRONMENTAL SCI
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