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Device for measuring content of non-methane total hydrocarbon in ambient air

A technology of ambient air and measurement devices, applied in the direction of measurement devices, sampling devices, dispersed particle filtration, etc., can solve problems such as poor strength, easily damaged screens, and reduced air volume, and achieve the effect of ensuring service life

Pending Publication Date: 2021-12-17
SHANGHAI INST OF MEASUREMENT & TESTING TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to prevent the impurities in the air from entering the detection equipment when collecting air samples, a screen is generally used to filter and block. However, as the number of blocked impurities increases, the impurities accumulate on the top of the screen, which will affect the filter holes above the screen. Blocking reduces the amount of air that passes through the screen at one time, because the working efficiency of the air extraction equipment of the collection equipment remains unchanged, and the screen is a mesh structure with poor strength, which will cause the sampled air to cause damage to the screen. The increase of pressure will cause the screen to be easily damaged. Therefore, we propose a device for measuring the content of non-methane total hydrocarbons in ambient air

Method used

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  • Device for measuring content of non-methane total hydrocarbon in ambient air
  • Device for measuring content of non-methane total hydrocarbon in ambient air
  • Device for measuring content of non-methane total hydrocarbon in ambient air

Examples

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Embodiment 1

[0030] The present invention provides a technical solution: a device for measuring the content of non-methane total hydrocarbons in ambient air, please refer to figure 1 and figure 2 ,include,

[0031] Detection equipment 1, detection equipment 1 uses chromatographic separation technology to separate the methane in the gas to be tested and uses a hydrogen flame ionization detector to detect it separately, and at the same time uses a hydrogen flame ionization detector to detect the total hydrocarbons in the gas to be measured , the non-methane total hydrocarbon concentration value is obtained after subtracting the methane concentration from the total hydrocarbon concentration. This method belongs to the prior art and will not be described in detail; and,

[0032] Sampling equipment 2 includes a sampling box, a screening mechanism 3 and air extraction equipment, and the sampling box is installed on the top wall of the detection equipment 1, and the inner cavity of the sampling...

Embodiment 2

[0041] see Figure 4 and Figure 5 , on the basis of Embodiment 1, mounting blocks 310 are installed on the side walls of the guide sliders 39 on the left and right sides that are close to each other. Sliding connection, the top wall of the support block 311 is fixedly connected with the bottom wall of the lower screen 321, after the upper screen 321 is pulled away, the overall weight of the screening assembly 32 is reduced, so that the support block 311 moves up with the screening assembly 32 , when the screening assembly 32 is pressed down again, the middle screen 321 can correspond to the electromagnet 35, ensuring that the electromagnet 35 can absorb and fix the screen 321 again, and the outer wall of the support block 311 is provided with a horizontal placement groove 315 for placing The inner chamber of groove 315 inserts limit block 314, and limit block 314 is slidably installed in the inner chamber of placement groove 315 by connecting spring, and the vertical section...

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Abstract

The invention discloses a device for measuring the content of non-methane total hydrocarbon in ambient air in the technical field of atmospheric environment detection equipment. The device comprises detection equipment and sampling equipment, wherein the sampling equipment comprises a sampling box, a screening mechanism and air extraction equipment, the sampling box is mounted on the top wall of the detection equipment, an inner cavity of the sampling box is communicated with an air inlet of the detection equipment, the air extraction equipment is installed at the bottom part of an inner cavity of the sampling box, the screening mechanism is installed at the top part of the inner cavity of the sampling box, and the screening mechanism comprises a screening assembly installed at the top part of the inner cavity of the sampling box in a sliding mode. The device is buffered by a buffer spring in a telescopic mode, thus the pressure on a screen mesh can be reduced when the pressure on the screen mesh is increased due to more impurities accumulated on the screening assembly, the probability of bending deformation of the screen mesh is reduced, the influence on the filtering and blocking quality due to the increase of the aperture of the screen mesh is avoided, and the service life of the sampling equipment is ensured.

Description

technical field [0001] The invention relates to the technical field of atmospheric environment detection equipment, in particular to a device for measuring the content of non-methane total hydrocarbons in ambient air. Background technique [0002] Non-methane total hydrocarbons refer to hydrocarbons other than methane. When the content of non-methane total hydrocarbons in the air reaches a certain value, it will cause harm to people and the environment and needs to be detected. [0003] When using a measuring device to test the content of non-methane total hydrocarbons in the ambient air, it is necessary to collect an air sample in the test area first, and then use the testing equipment to test the sample air to determine the content of non-methane total hydrocarbons; [0004] In order to prevent the impurities in the air from entering the detection equipment when collecting air samples, a screen is generally used to filter and block. However, as the number of blocked impuri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N33/00B01D46/10
CPCG01N1/2205G01N1/2273G01N33/00B01D46/10
Inventor 张亚飞夏凯
Owner SHANGHAI INST OF MEASUREMENT & TESTING TECH
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