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Portable air dioxin sampling device and method based on film adsorption

A sampling device and membrane adsorption technology, applied in sampling devices, sampling, measuring devices, etc., can solve the problems of reduced sampling efficiency, adsorption resin, filter cartridge damage, etc., and achieve the effect of simple structure

Pending Publication Date: 2020-05-19
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current sampling of dioxins mainly uses the improved soot sampler, and the filter cartridge, filter cartridge heating system, flue gas cooling system and resin adsorption filter device are loaded on the soot sampler, but the filter cartridge still occurs during the sampling process. Damaged, adsorbed resin and other phenomena, resulting in reduced sampling efficiency

Method used

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  • Portable air dioxin sampling device and method based on film adsorption
  • Portable air dioxin sampling device and method based on film adsorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The dioxin sampling device of the present invention is used to sample the dioxins in the exhaust gas of a waste incineration plant:

[0035] A waste incineration plant in Shanxi discharges flue gas into the air. After collecting and cooling the flue gas, it is introduced through the air inlet. The flue gas passes through the glass fiber membrane and enters the gas storage box. The flue gas flow rate during this process is controlled at 20ml / min. The flue gas in the gas storage box does not contain impurities such as large particles and flying plastics.

[0036] The flue gas in the gas storage box then enters the spiral sampling tube, and the flue gas is tested by using the fluorinated polypropylene fiber membrane prepared by fluorinating polypropylene under the condition of fluorine gas concentration of 2% (compared to air). Sampling of dioxin by adsorption lasts for 10 minutes.

[0037] The gas after absorbing and sampling dioxins through the spiral sampling tube flows ...

Embodiment 2

[0041] Get and use the dioxin sampling device of the present invention to sample the dioxins in the flue gas discharged by regional factories:

[0042] A factory in Guangzhou discharges flue gas into the air, collects and cools the flue gas, and then introduces it through the air inlet. The flue gas passes through the glass fiber membrane and enters the gas storage box. The flue gas flow rate during this process is controlled at 50ml / min. The flue gas in the gas storage box does not contain impurities such as large particles and flying plastics.

[0043] The air in the gas storage box then enters the spiral sampling tube, and the flue gas is adsorbed by the fluorinated polypropylene fiber membrane prepared by fluorinating polypropylene under the condition of fluorine gas concentration of 1.5% (compared to air). Sampling of dioxins lasts for 15 minutes.

[0044] The gas that has undergone adsorption and sampling of dioxin by the spiral sampling tube flows into the air through ...

Embodiment 3

[0048] Take the dioxin sampling device of the present invention to sample the dioxins in the flue gas discharged by a certain waste incineration plant:

[0049] A waste incineration plant in Beijing discharges flue gas into the air, collects and cools the flue gas and introduces it through the air inlet. The flue gas passes through the glass fiber membrane and enters the gas storage box. The flue gas flow rate during this process is controlled at 35ml / min. The flue gas in the gas storage box does not contain impurities such as large particles and flying plastics.

[0050] The air in the gas storage box then enters the spiral sampling tube, and the flue gas is adsorbed by the fluorinated polypropylene fiber membrane prepared by fluorinating polypropylene under the condition of fluorine gas concentration of 1% (compared to air). Sampling of dioxins lasts for 15 minutes.

[0051] The gas that has undergone adsorption and sampling of dioxin by the spiral sampling tube flows into ...

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Abstract

The invention discloses a portable air dioxin sampling device and method based on film adsorption. The portable air dioxin sampling device comprises an air pump sampler and a film absorption samplingdevice, wherein the air pump sampler comprises an air inlet pipe, an air pump, a gas flowmeter and an air storage tank, air inlets are formed at two sides of the top of the air storage tank, the air inlets are in threaded connection with the air inlet pipe, the gas flowmeter is mounted in the air storage tank, the air pump comprises an air suction nozzle and an air exhaust nozzle, the air suctionnozzle is mounted in the air storage tank, the film absorption sampling device comprises a spiral sampling pipe and an outer cover, the spiral sampling pipe is placed in the outer cover, the spiral sampling pipe and the outer cover are in threaded connection with the gas storage tank, the outer cover is provided with a plurality of small holes, and the bottom of the outer cover is provided with anexhaust nozzle of the air pump, and a fluorinated polypropylene fiber film is mounted on an inner wall of the spiral sampling pipe. The dioxin sampling device is advantaged in that dioxin in the airis efficiently and quickly sampled by utilizing the fluorinated polypropylene fiber film, and the dioxin sampling device is simple in structure, light and handy and portable.

Description

technical field [0001] The invention relates to the technical field of air sampling, in particular to a portable air dioxin sampling device and method based on membrane adsorption. Background technique [0002] Dioxins, also known as dioxins, are polychlorinated dibenzofurans (PCDFs) composed of an oxygen atom linked to two benzene rings substituted by chlorine atoms. It includes 210 kinds of compounds, which are very stable, have a high melting point, are extremely difficult to dissolve in water, can be dissolved in most organic solvents, and are colorless, odorless, fat-soluble substances. [0003] Dioxins are highly toxic organic chemicals with properties similar to the "Big 12," a group of dangerous chemicals known as persistent organic pollutants. Therefore, dioxin is the most terrible chemical substance created by human beings at present, and is called "the most toxic poison on earth". [0004] Dioxin hardly exists in nature and can only be produced through chemical ...

Claims

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Application Information

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IPC IPC(8): G01N1/22G01N1/24G01N1/40B01D53/22B01D65/02
CPCG01N1/2214G01N1/24G01N1/4055B01D53/228B01D65/02G01N2001/4061
Inventor 陆钢宋华英曾力希吕世杰黄腾浩朱璇瑾范存霖魏志永
Owner JINAN UNIVERSITY
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