Combined portable PM2.5 sampling analysis device

Abstract

The invention discloses a combined portable PM2.5 sampling analysis device. The combined portable PM2.5 sampling analysis device comprises a host, a PM2.5 sampling head, a temperature and humidity sensor and a modular filter membrane assembly, wherein the PM2.5 sampling head, the temperature and humidity sensor and the modular filter membrane assembly are mounted on the host; the host comprises a sampling head fixing seat, a heating module, a filter paper compressing mechanism, a gas inlet pipe, a gas inlet connecting assembly, a filter paper supporting platform, a receiver seat, a ray source receiver and paper feeding assemblies; the sampling head fixing seat, the heating module, the filter paper compressing mechanism, the gas inlet pipe and the gas inlet connecting assembly are sequentially connected; the filter paper supporting platform, the receiver seat and the ray source receiver are positioned below the gas inlet connecting assembly and are sequentially connected; the paper feeding assemblies are positioned at two sides of the filter paper supporting platform; the modular filter membrane assembly is mounted in the filter paper supporting platform. By virtue of the matching of the modular filter membrane assembly and the host, the combined portable PM2.5 sampling analysis device can be used for directly reading PM2.5 on line, and can also be used for weighing PM2.5 concentration by using a weighing method; meanwhile, a sample can be taken back to a laboratory for further component analysis; an overall instrument is convenient to carry, low in detection cost, easy to operate, small in labor workload, high in real-time monitoring efficiency and capable of analyzing and comparing data diversity.

Description

technical field [0001] The invention relates to a PM2.5 sampling and analyzing device, in particular to a combined portable PM2.5 sampling and analyzing device. Background technique [0002] At present, the types of PM2.5 sampling and analysis equipment at home and abroad mainly include the equipment using the filter weighing method and the equipment using the β-ray analysis method. The filter membrane weighing method is the basic method, the β-ray analysis method is the indirect method, and the filter membrane weighing method is the It needs to be weighed with a high-sensitivity balance in the laboratory, which is not suitable for on-site testing. The β-ray analysis method is an online direct reading method, which is suitable for online monitoring and on-site detection. The PM2.5 detection instrument based on the β-ray analysis method needs to be traced and calibrated by weighing the filter membrane. Secondly, the existing β-ray method for measuring PM2.5 uses a paper tape...

AI Technical Summary

Problems solved by technology

However, the paper tape is for one-time use, and it is inconvenient to store and transfer

The filter membrane weighing method can recover the filter membrane and carry out subsequent chemical composition analysis of PM2.5. Both methods have their own advantages and disadvantages. These two instruments can analyze the concentration of PM2.5 separately, but in practice In use, both methods require the use of

This increases the cost of environmental monitoring and prolongs the monitoring cycle, and at the same time causes disadvantages such as inconvenient carrying when going out for monitoring.

The preliminary preparation work of the filter weighing method is cumbersome, the manual workload is large, and the direct reading data of the β-ray analysis method cannot be obtained after the sampling is completed to compare with the readings of the later weighing method. The performance is single, which affects the real-time monitoring efficiency.

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