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Ambient air nitrogen oxide sampling system

A technology of nitrogen oxides and ambient air, applied in sampling, sampling devices, measuring devices, etc., can solve the problems of increasing gas residence time, gas pump failure, increasing gas residence time in the absorption tube, etc., to achieve full contact mass transfer The effect of increased reaction time

Inactive Publication Date: 2021-04-23
杨松
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Prior art 1 adds "L"-shaped baffles in the bubble absorption tube to deflect the gas in the absorption tube to increase the residence time of the gas in the absorption tube, so that the pollutants and the absorption liquid can react more fully, so as to meet the The representativeness of sampling and the accuracy and precision of data analysis are the goals, but setting baffles will increase the resistance pressure drop of the absorption pipe, which may make the gas extraction pump unable to work
In prior art 2, the colorimetric tube is added as a baffle tube, the purpose is to deflect the gas in the absorption tube to increase the residence time of the gas in the absorption tube, so that the pollutants and the absorption liquid can react more fully. Similarly, the baffle tube is set It will increase the resistance pressure drop of the absorption pipe, which may make the gas extraction pump unable to work

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  • Ambient air nitrogen oxide sampling system
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  • Ambient air nitrogen oxide sampling system

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0042] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 As shown, the ambient air nitrogen oxide sampling system is characterized by: including hanging basket self-circulating sampling tube I, self-circulating sampling tube with low branch II, self-circulating sampling tube with high branch III, circulating fluidized bed type Sampling tube IV, gas pump V, the hanging basket self-circulating sampling tube I, low-branch self-circulating sampling tube II, high-branch self-circulating sampling tube III, circulating fluidized bed sampling tube IV, gas pump V is connected in series in sequence.

[0043] The hanging basket self-circulating sampling tube I includes a hanging basket self-circulating sampling tube body 1 and a plugged hanging basket air guide assembly 2. The air bubble 3 and the lower air bubbl...

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Abstract

The invention relates to the technical field of environmental monitoring, in particular to an ambient air nitrogen oxide sampling system. The system is characterized by comprising a hanging basket self-circulation type sampling pipe, a self-circulation type sampling pipe with a low branch, a self-circulation type sampling pipe with a high branch, a circulating fluidized bed type sampling pipe and a gas sampling pump, and according to a natural circulation working principle, a circulation loop is designed in an absorption bottle, so that absorption liquid naturally and circularly flows in the circulation loop in the absorption bottle, the bubbles naturally and circularly flow along with the absorption liquid until the bubbles grow into large bubbles, and then the bubbles are broken on the liquid surface, so that the time of full contact mass transfer reaction between the nitrogen oxide and the absorption liquid is prolonged even if the use amount of the absorption liquid is not increased and finer sieve pores are not designed.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to an ambient air nitrogen oxide sampling system. Background technique [0002] In the process of collecting samples of nitrogen oxide pollutants in the ambient air, both short-term sampling and long-term continuous sampling require that the pollutants fully react with the absorbing liquid, and the absorbing liquid will not be carried away by the gas. In addition to causing gas pump failure, It also affects the recovery and constant volume work of samples in the subsequent absorption liquid, thereby affecting the representativeness of sampling and the accuracy and precision of data analysis. Chinese invention patent (patent No. CN95218722.1, patent name is atmospheric sampling absorption tube) discloses a chemical analysis instrument for monitoring nitrogen oxides and sulfur dioxide in the atmospheric environment, which is characterized in that the pumping bubble (1...

Claims

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Application Information

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IPC IPC(8): G01N1/22
CPCG01N1/2214G01N2001/2217
Inventor 杨松
Owner 杨松