Atmosphere dehumidification method and device

Abstract

The invention provides an atmosphere dehumidification method and device. The atmosphere dehumidification method comprises the following steps: introducing the atmosphere which needs to be dehumidified into a dehumidification gas channel arranged in an inner wall of a dehumidification pipe to ensure that the inner wall of the dehumidification pipe is in contact with the atmosphere which needs to be dehumidified; enabling a permeating membrane to adsorb moisture in the atmosphere, and diffusing the moisture adsorbed by the permeating membrane to the outer wall of the dehumidification pipe from the inner wall of the dehumidification pipe; collecting the requisite amount of drying atmosphere dehumidified by the dehumidification pipe by using a sampling pump, and enabling the surplus drying atmosphere dehumidified by the dehumidification pipe to enter a gas backflow channel in a backflow manner; and enabling the drying atmosphere in the gas backflow channel to be in contact with the outer wall of the dehumidification pipe, taking away the moisture of the outer wall of the dehumidification pipe, and discharging the wet atmosphere which is in contact with the outer wall of the dehumidification pipe. The atmosphere dehumidification method and device provided by the invention have the advantages that the damage caused by aerosol particles in a heating dehumidification process is effectively avoided, the influence of an atmospheric moisture factor on atmosphere mass concentration monitoring can be avoided, and the method and the device are suitable for lossless atmosphere mass quality monitoring use.

Description

Technical field [0001] The present invention relates to the field of air quality monitoring, in particular to an air dehumidification method and device. Background technique [0002] At present, the total emissions of major air pollutants in my country are still large. Atmospheric compound pollution represented by atmospheric fine particles PM2.5 and ozone is rapidly deteriorating and spreading. The situation of the atmospheric environment is very severe. Direct means of evaluation. [0003] In the four seasons of the year, the atmospheric humidity in our country is different, and the humidity difference between the south and the north is also large. The large proportion of water vapor in the atmosphere will cause the size of the aerosol particles in the atmosphere to increase, thereby making the measured atmosphere The mass concentration of particulate matter is too high. The relationship between atmospheric humidity and aerosol particle size is closely related to the environmenta...

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Problems solved by technology

[0003] In the four seasons of the year, the atmospheric humidity in our country is different, and the humidity in the south and the north is also very different. The large proportion of water vapor in the atmosphere will cause the size of the aerosol particles in the atmosphere to increase, so that the measured atmospheric The mass concentration of particulate matter is high, and the relationship between atmospheric humidity and aerosol particle size is closely related to the environmental conditions of the monitoring instrument. The exact relationship between them has not been found so far, so dehumidification of the sampled atmosphere before monitoring has become an important issue in the atmosphere. Necessary process in mass concentration monitoring

[0004] The method of heating and dehumidification can effectively remove the water vapor in the sampled atmosphere. In order to ensure the efficient volatilization of water vapor in the atmosphere, the heating and dehumidification device needs to be heated to a high temperature close to 100°C, but such a high temperature will cause some components in the sampled atmosphere to generate high temperature. Volatilization or high temperature damage, which affects the accuracy of monitoring results

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