High-frequency double-tube dynamic measurement device and method for atmospheric particulate matter dry settling flux

Abstract

The invention provides a high-frequency double-tube dynamic measurement device and method for atmospheric particulate matter dry settling flux. The device comprises an ultrasonic anemograph, a first particulate matter cutter, a second particulate matter cutter, a first sampling pipe, a second sampling pipe, a sucking pump, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a particulate matter online analysis instrument and an electric control device. The device has the advantages that (1) continuous sampling ofan atmospheric sample is ensured, and the collected sample is analyzed in real time; (2) rapid on-line analysis of the dry settling flux of the particulate matters is realized, and system errors suchas small sample amount, long analysis period and variable chemical components in an off-line analysis process are avoided; (3) a double-tube measurement method is adopted, so the situation that particulate matter samples are possibly polluted by one another in the collection process is avoided, the retention time of particulate matters in the sampling tube is reduced to the greatest extent by a dynamic measurement method, the loss of the sample amount is reduced, and the measurement accuracy is improved.

Description

technical field [0001] The invention belongs to the technical field of cause research and treatment of atmospheric particulate matter pollution, and in particular relates to a high-frequency double-tube dynamic measurement device and method for atmospheric particulate matter dry deposition flux. Background technique [0002] Atmospheric particulate matter is a general term for particulate matter formed by various solid and liquid pollutants in the atmosphere. The aerosol dispersion system formed by dispersing and suspending in a gas medium directly or indirectly affects climate change, air quality and human health etc. Due to the relatively slow settling velocity, aerosol particles tend to have a longer life cycle in the atmosphere than reactive gases, and have a profound impact on the environment and human beings. As dry deposition is one of the important means to remove particulate matter from the atmosphere, accurate measurement and analysis of dry deposition flux and ra...

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Problems solved by technology

[0016] At present, relaxation vorticity accumulation method is mostly combined with off-line analysis method, which still has the disadvantages of small sample amount, long analysis period, and variable chemical composition.

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