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Stationary-source particle dilution sampling system

A sampling system and particle technology, applied in the direction of sampling device, test sample preparation, etc., can solve the problems of inability to control the residence time, deviation of measurement results, loss of particles, etc., to reduce length, reduce experimental error, and strengthen uniform mixing degree of effect

Inactive Publication Date: 2015-12-16
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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  • Stationary-source particle dilution sampling system
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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the examples, but the present invention is not limited to the following examples.

[0031] The structural diagram of the specific embodiment of the fixed source particulate matter dilution sampling system provided by the present invention is as follows: figure 1 shown. The invention is mainly composed of five parts: a gas introduction system, a dilution retention system, a sample collection system, a control and data collection system, and a remote operation terminal.

[0032] The flue gas introduction system is composed of a digital isokinetic sampling bong, a heating insulation pipe I4, a drainage chamber 5, and a mass flow controller A6 (installed in the main box) in series. A sampling nozzle 1 , a heating sampling tube 2 and a liquid crystal control panel 3 are arranged on the digital isokinetic sampling gun. The outlet of the sampling port of the drainage chamber 5 is connected to the inlet...

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Abstract

A stationary-source particle dilution sampling system is disclosed and belongs to the field of environment monitoring. The system comprises a smoke introduction system, a dilution staying system, a sample acquisition system and a control and data acquisition system. The system employs a three-grade injection type diluter which is capable of enhancing the mixing uniformity of smoke and a diluting gas and reducing the length of the dilution mixing segment, and the first-grade and second-grade diluters control the dilution ratio both by adjusting the flow rate and the pressure of the diluting gas.

Description

technical field [0001] The invention relates to a boiler flue gas PM2.5 level volatile organic compound dilution sampling system, in particular to a system capable of cooling the high-temperature flue gas discharged from a coal-fired boiler source, adopting an atmospheric environment particulate matter sampling method for particulate matter sampling, and can be changed Dilution sampling system for remote control of sampling equipment by dilution ratio and residence time. It belongs to the field of environmental monitoring. technical background [0002] Boiler flue gas emission is one of the main sources of primary PM2.5 in my country. Reasonable collection of PM2.5 emitted by various boilers and clarification of the particle size distribution and physical and chemical characteristics of the emitted particles are useful for analyzing the source of air pollutants and formulating scientific and effective regulations. The PM2.5 compliance control plan is of great significance. ...

Claims

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Application Information

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IPC IPC(8): G01N1/24G01N1/38
Inventor 程水源姚森张晗宇陈国磊
Owner BEIJING UNIV OF TECH
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