On-line atmospheric fine particle concentration and collection device and on-line atmospheric fine particle concentration and collection method

Abstract

The invention belongs to the technical field of environmental protection, and particularly relates to an online atmospheric fine particulate matter concentration and collection device and method. Thedevice comprises a PM2.5 cutting head, a water tank system, a virtual cutting system, a condensation circulating system and an online concentrated sample collection system, wherein the water tank system comprises a water tank, an electric heating rod and a temperature control digital display device, the PM2.5 cutting head is communicated with the water tank, the virtual cutting system comprises avirtual cutter, a concentrated airflow vacuum pump and a main airflow vacuum pump, the condensation circulating system comprises a condensing agent circulating pipe and a condenser, the condensation circulating system is used for circulating condensate to condense and grow up saturated particulate matters, and the online concentrated sample collection system comprises a biological sampling bottle,an electromagnetic valve, a relay, an automatic fraction collector and a computer subdivision constant flow pump. The device can concentrate the actual atmospheric fine particles by 7-10 times, and the concentration efficiency is high; technical support can be provided for subsequent online chemical component or toxicity detection; and the device is simple and convenient to operate, reliable, stable and low in maintenance cost.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a medium-flow particle concentration system and method, in particular to an online atmospheric fine particle concentration and collection device and method. Background technique [0002] PM 2.5 Refers to particulate matter in the atmosphere with an aerodynamic equivalent diameter of less than or equal to 2.5 microns, also known as inhalable particulate matter. Although PM 2.5 It is only a small component of the earth's atmospheric composition, but it has an important impact on air quality and visibility. Atmospheric PM 2.5 The particle size is small, the specific surface area is large, it contains a large amount of toxic and harmful substances, and it has a long suspension time in the atmosphere and a long transmission distance. Therefore, the negative impact on human health and the quality of the atmospheric environment cannot be ignored. [0003...

AI Technical Summary

Problems solved by technology

However, due to the restriction of detection technology and instruments (such as high detection limit), the determination of the toxicity of atmospheric fine particles is still in the offline detection stage, and it needs to be carried out under the conditions of heavy pollution and long continuous sampling time. Meet the requirements for real-time monitoring of the concentration of atmospheric fine particles and the characteristics of toxic chemical components

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