Pollution source fine particulate matter dilution sampling method and device

Abstract

The invention relates to a pollution source fine particulate matter dilution sampling method and device. The device comprises a multifunctional sampling pipe, a retention chamber, a PM10 particulate matter cutter, a shunt, an automatic film changing device, a PM2.5 particulate matter cutter, a PM10 sampling filter film, a PM2.5 sampling filter film, a flow sensor q, a three-way pipe, an electromagnetic valve, a PM10 sampling pump, a PM2.5 sampling pump, a dilution gas channel system and pipeline, a single-chip microcomputer, a pitot pipe differential pressure sensor delta P1, a temperature sensor Tc, a pressure sensor Pc, a pressure sensor Pd, a display device, a keyboard and a communication interface, wherein the multifunctional sampling pipe, the retention chamber, the PM10 particulate matter cutter and the shunt are sequentially connected in series. The device provided by the invention can realize the functions of constant-speed sampling of sample gas, simultaneous constant-current graded sampling of particulate matters with different particle sizes in the sample gas, real-time measurement of humidity of the sample gas and automatic film changing, and also can figure out the emission concentration and emission amount of PM10 and PM2.5 according to the flow rate of the sample gas in the pipeline, the diameter of the pipeline, the sampling volume and the amount of PM10 and PM2.5 obtained by sampling.

Description

technical field [0001] The invention relates to a dilution sampling method and device for fine particles of pollution sources, belonging to the field of environmental protection monitoring instruments. Background technique [0002] The exhaust gas and fine particles discharged from the pollution source discharge pipeline (hereinafter referred to as the pipeline), because the humidity and temperature of the gas in the pipeline are higher than the ambient humidity and temperature, many dynamic physical and chemical dynamic processes (nucleation) will occur after being discharged into the ambient atmosphere. action, condensation, compression, etc.) and chemical processes that pollute the ambient air. In order to monitor the emission of fine particulate matter from pipelines and the source of air pollution, it is necessary to collect samples with a fine particulate matter sampler from the pollution source. [0003] Existing technologies are: [0004] The jet technology is used...

AI Technical Summary

Problems solved by technology

In addition to increasing the size, weight, cost, and energy consumption of the sampler, PM cannot be calculated 2.5 Particulate Matter Concentration and Emissions

[0006] The existing samplers do not have real-time humidity monitoring function during the sampling process, nor can they be used to collect PM at the same time 10 , PM 2.5 sample, and the filter membrane needs to be replaced manually, which is labor-intensive

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