A sampling device and method for estimating the intensity of air pollution area sources

A sampling device and non-point source technology, which are applied in the field of sampling of air pollution non-point source intensity estimation to achieve the effects of good aerodynamic performance and uniformity

Active Publication Date: 2015-10-28
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There may still be a big gap between directly using the above methods to estimate the area source intensity and the actual situation

Method used

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  • A sampling device and method for estimating the intensity of air pollution area sources
  • A sampling device and method for estimating the intensity of air pollution area sources

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Estimation of Surface Emission Sources from Landfill Sites

[0038] A sampling method for estimating surface source intensity at landfill sites, which uses sampling devices such as figure 1 As shown, it includes a frequency conversion fan 1 connected in sequence by pipelines, an activated carbon tank 2, a differential pressure flowmeter combination composed of an interconnected differential pressure flowmeter 3 and a pressure transmitter 4, and a sampling wind tunnel 5. The sampling wind tunnel 5 The outlet is connected to the wind tunnel outlet mixing pipe 9, and the wind tunnel outlet mixing pipe 9 is provided with a sampling port 10.

[0039] The sampling wind tunnel 5 is made of polished stainless steel, which is corrosion-resistant and prevents the deviation of measurement results due to adsorption and cross-contamination. The ratio of the cross-sectional area of ​​ventilation is controlled between 0.4 and 0.8. There is an opening at the bottom of the sampling win...

Embodiment 2

[0042] Estimation of Source Intensity Sampling Determination of Surface Emission Sources on Liquid Pool Surfaces

[0043] A sampling method for area source intensity estimation of liquid pools, the sampling device used is such as figure 2 As shown, it includes a frequency conversion fan 1 connected in sequence by pipelines, an activated carbon tank 2, a differential pressure flowmeter combination composed of an interconnected differential pressure flowmeter 3 and a pressure transmitter 4, and a sampling wind tunnel 5. The sampling wind tunnel 5 The outlet is connected to the wind tunnel outlet mixing pipe 9, and the wind tunnel outlet mixing pipe 9 is provided with a sampling port 10.

[0044] The sampling wind tunnel 5 is made of polished stainless steel, which is corrosion-resistant and prevents the deviation of measurement results due to adsorption and cross-contamination. The ratio of the cross-sectional area of ​​ventilation is controlled between 0.4 and 0.8. There is a...

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Abstract

The invention relates to a sampling apparatus and a sampling method used for estimation of the source intensity of a non-point atmospheric pollution source. The apparatus comprises a frequency-variable fan, a gas purifying tank, a differential pressure flowmeter and a sampling wind tunnel successively connected through pipelines, wherein the outlet of the sampling wind tunnel is connected with a wind tunnel outlet hybrid tube which is provided with a sampling port. According to the invention, the frequency of the frequency-variable fan is indicated and adjusted through the differential pressure flowmeter so as to purify a set flow of ambient air, and the purified ambient air is sent to the sampling wind tunnel, passes through the surface of the non-point source below the sampling wind tunnel at a corresponding sweeping air speed and carries pollutants given out by the surface of the non-point source; and the emission source intensity of the non-point source at the surface wind speed can be estimated through acquisition and determination of gas-phase concentration of the pollutants under such a condition at a sampling point of an outlet pipeline of the sampling wind tunnel and combined consideration of determined parameters like the flow of sweeping gas and a sweeping area. Compared with the prior art, the invention has the advantages of accuracy, reliability and the like.

Description

technical field [0001] The invention relates to the technical field of environmental protection and solid waste treatment and disposal, in particular to a sampling method for estimating the intensity of air pollution area sources. Background technique [0002] The source intensity and discharge law of pollution sources are the basis for estimating pollution hazards and formulating control measures. At present, there are mature sampling tests and source intensity calculation methods for air pollution point sources discharged through exhaust tubes, but for atmospheric non-point source pollution sources whose pollution source intensity will change with changes in environmental wind speed, etc., there is still a lack of general methods. method for estimating source strength. For example, with the continuous increase of urban population, the amount of domestic waste is also increasing. As the final disposal method of urban domestic waste, sanitary landfill is widely used because...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/22G01M9/02
Inventor 羌宁王红玉
Owner TONGJI UNIV
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