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Trapping device for sampling dioxin in flue gas and application thereof

A technology of flue gas and dioxin, which is applied in the direction of sampling device and test sample preparation, etc., which can solve the problems of pollution and difficult cleaning

Inactive Publication Date: 2012-05-16
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of the above two methods in practice is that a large amount of particles and dioxins will be adsorbed in the coil condenser. Since the particles and dioxins are adsorbed on the inner wall of the coil, it is difficult to be cleaned, and the residue will be harmful to the environment. Subsequent sampling activities constitute direct contamination

Method used

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  • Trapping device for sampling dioxin in flue gas and application thereof
  • Trapping device for sampling dioxin in flue gas and application thereof
  • Trapping device for sampling dioxin in flue gas and application thereof

Examples

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Embodiment 1

[0021] Example 1 Assemble a sampling device according to the structure of the attached drawings in the specification of the present invention, collect a sample of flue gas from a domestic waste incinerator, and add isotope-labeled XAD2 resin 37 Cl-2378-TCDD sampling internal standard, isokinetic sampling. Sampling rate 24.88l / min, standard dry flue gas flow rate 21.70l / min, sampling nozzle diameter 6mm, line speed 14.67m / s, sampling volume 2.3068m 3 (Volume of dry flue gas under standard conditions).

[0022] The collected samples are sealed and preserved after cleaning and collection procedures, and are transported to the laboratory at low temperature. After Soxhlet extraction, multi-step chromatography column purification, and isotope dilution high-resolution mass spectrometry analysis.

[0023] Table 1 is a comparison between sampling using the method of the present invention and sampling and analyzing the detection results using traditional methods. The analysis results show th...

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Abstract

The invention provides a trapping device for sampling dioxin in flue gas and application thereof. The trapping device is characterized in that a smoke dust trapping unit consists of a glass fiber filter cartridge or filter film, a flue gas cooling unit consists of a through-type water cooling condenser, and a flue gas trapping unit consists of XAD2 resin. The trapping device and method for sampling dioxin in flue gas, relating to the invention, are also applicable to the collecting of other semivolatile organic pollutants in flue gas. The trapping device has the characteristics that a condensing device in a device for collecting dioxin in flue gas is improved, and the trapping efficiency of the process of collecting dioxin in flue gas can be enhanced, residuals of a sampler can be reduced, and accuracy of sampling and environmental monitoring can be improved.

Description

Technical field [0001] The invention relates to a new trapping device for sampling dioxins in flue gas, in particular to a condensation trapping device for collecting dioxins in flue gas and its application. Background technique [0002] Sampling guns for flue gas dioxin pollutants such as polychlorinated dibenzo-pdioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are different from conventional soot sampling In order to ensure the sampling quality and meet the analysis requirements, the sampling gun is equipped with a gun body heating system, a dust collection chamber heating system, and flue gas cooling in accordance with the requirements of HJ / T 77.2, EPA 23 and EN 1948-1. System, condensate capture system and flue gas XAD2 capture system. [0003] The sampling gun system for monitoring dioxin pollutants in flue gas mainly considers the barrel heating system to prevent the flue gas from condensing in the barrel; the heating system of the dust collection chamber ensures t...

Claims

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Application Information

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IPC IPC(8): G01N1/22G01N1/24G01N1/28
Inventor 倪余文苏凡陈吉平车迅黄威东
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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