High-humidity flue gas particle sampling and measuring device and use method thereof

Abstract

The invention discloses a high-humidity flue gas particle sampling and measuring device and a use method thereof, and belongs to the technical field of flue gas particle matter sampling and measuring.The high-humidity flue gas particle sampling and measuring device includes a high-humidity flue gas dehumidification device, a flue gas dilution device, a particle separation device, a sampling and measuring device and a vacuum pump; a flue gas tube made from an ion exchange membrane is adopted, the selective permeability of the flue gas tube to water is used for conducting primary dehumidification, a heating device is arranged on the outer wall of a dry air convection tube, the temperature of flue gas is increased, and the flue gas is subjected to secondary dehumidification; external dry airis introduced to the high-humidity flue gas particle sampling and measuring device, introduction of the dry air facilitates outflow of escaping moisture, the concentration difference of the moistureon the two sides of the flue gas tube is increased, and the dehumidification ability is improved; and meanwhile, the flue gas with the increased concentration after dehumidification is diluted by arranging the flue gas dilution device and the particle separation device, and meanwhile, large particles of a non-test target are removed to meet the requirements of subsequent sampling and measuring. The high-humidity flue gas particle sampling and measuring device has reasonable structure design, convenient operation and accurate measuring values.

Description

technical field [0001] The invention belongs to the technical field of smoke particle sampling and measurement, and in particular relates to a high-humidity smoke particle sampling and measuring device and a use method thereof. Background technique [0002] PM2.5 in the air not only aggravates the smog weather, but also because of its small particle size and long residence time in the air, it is very easy to combine toxic substances in the air, when it enters the human blood circulation with breathing , will bring great harm to human health and increase the risk of disease. In recent years, with the increasing smog weather, atmospheric particulate matter pollution has become a hot topic in society. At present, my country has comprehensively carried out the measurement of atmospheric particulate matter to effectively control the emission of smoke particulate matter and other atmospheric particulate matter. [0003] According to relevant research, it is found that the flue ga...

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Problems solved by technology

This invention dehumidifies high-humidity flue gas through the gas-liquid cyclone separator placed at the front end of the sampling gun and the nafion tube bundle used in the sampling gun barrel, but the gas-liquid cyclone separator used in this invention is likely to cause mis-separation of particles during the working process , the sample collection error is relatively large, it is not suitable for the measurement and analysis of particle size characteristics, and the flue gas of this invention is diluted with gas to reduce the proportion of moisture content after being bundled by nafion tubes, and the dehumidification capacity is limited

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