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Dilution sampling system and sampling method of fixed source particles and volatile organic compounds

A volatile organic compound, sampling system technology, applied in the direction of sampling devices, etc., can solve the problems of particle loss, measurement result deviation, unable to control the residence time, etc., to reduce the length, strengthen the mixing uniformity, and maintain the pressure balance effect.

Inactive Publication Date: 2013-05-08
BEIJING UNIV OF TECH
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Problems solved by technology

On the one hand, the system does not heat the diluted air flow, and the mixture of flue gas and clean air causes premature condensation of particles due to local supercooling effect, resulting in the loss of part of the particles, resulting in deviations in measurement results
On the other hand, due to the constant gas volume entering the residence chamber, the system cannot control the residence time

Method used

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  • Dilution sampling system and sampling method of fixed source particles and volatile organic compounds
  • Dilution sampling system and sampling method of fixed source particles and volatile organic compounds

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Embodiment Construction

[0021] The structural schematic diagram of the specific embodiment of the fixed source particulate matter and volatile organic compound dilution sampling system provided by the present invention is as follows figure 1 shown.

[0022] The invention is mainly composed of five parts including a flue gas introduction system, a dilution system, a dwelling chamber, a sample collection system, and a control and data collection system.

[0023] The flue gas introduction system is composed of a constant velocity sampling bong, a heating insulation pipe I4, a drainage chamber 5, a flow controller 6 in the drainage chamber, and an air pump 7 connected in series. A sampling nozzle 1 , a heating sampling tube 2 and a pitot tube 3 are arranged on the isokinetic sampling gun. The outlet of the sampling port of the drainage chamber 5 is connected to the inlet of the dilution system, and the other end of the drainage chamber 5 is connected in series with the flow controller 6 of the drainage ...

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Abstract

The invention discloses a dilution sampling system and a sampling method of fixed source particles and volatile organic compounds, and belongs to the technical field of environmental monitoring. The dilution sampling system comprises a smoke introducing system, a diluting system, a stopping chamber, a sample collection system and a control and data collection system. The system can simulate the nucleation, condensation and coagulation processes of the fixed source smoke after being discharged to the atmosphere, can adopt a grain size classification sampling method of atmospheric particulate matters to sample the particulate matters, can adopt the atmospheric volatile organic matter sampling method to sample the volatile organic matters, and can realize the dynamic control of dilution ratio and the dynamic stopping time. Each part of the system has the advantages of high integration, high stability, automation in control, and easiness in operation.

Description

technical field [0001] The invention relates to a fixed source particle and volatile organic compound dilution sampling system, in particular to a system capable of cooling high-temperature flue gas discharged from a fixed source, adopting an atmospheric environment particulate matter sampling method for particle matter sampling, and adopting an atmospheric environment volatile organic compound sampling method The invention relates to a dilution sampling system capable of sampling volatile organic compounds and changing the dilution ratio and residence time, belonging to the technical field of environmental monitoring. technical background [0002] Particulate matter and volatile organic compounds emitted by stationary sources are important sources of air pollution. How to reasonably collect particulate matter and volatile organic compounds emitted by stationary sources, and analyze the particle size distribution and chemical composition of particulate matter and volatile org...

Claims

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Application Information

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IPC IPC(8): G01N1/24
Inventor 程水源李国昊郎建垒
Owner BEIJING UNIV OF TECH
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