Online volatile organic matter analyzer and using method thereof

Abstract

The invention relates to an online gas volatile organic matter analyzer and a using method thereof. The analyzer comprises a sampling device (1), a gas supplying device (2) and a refrigerating device (3), wherein the refrigerating device (3) is connected with the sampling device (1) and the gas supplying device (2) respectively. A double-hollow-pipe cold enriching double-detector gas online volatile organic matter analyzer further comprises a gas flow control device (4), an analysis device (5) and a data acquiring and processing device, wherein the gas flow control device (4) is connected with the sampling device (1) and the gas supplying device (2) respectively; the analysis device (5) is connected with the gas flow control device (4); and the data acquiring and processing device is connected with the analysis device (5). The invention has the advantages: ultralow temperature refrigeration is realized by adopting an electronic refrigerating technology, so that the defects of frequent addition of liquid nitrogen during refrigeration with liquid nitrogen and limit on the application conditions are overcome, the analyzer can run automatically continuously for a long time, and automatic operation is convenient.

Description

technical field [0001] The invention relates to an analyzer for volatile organic compounds in gas and a method of using the same, in particular to an on-line analyzer for volatile organic compounds in gas and a method for using the same. Background technique [0002] Volatile Organic Compounds (VOCs) refer to compounds with a boiling point range of 50°C-260°C and a saturated vapor pressure of more than 133.322Pa at room temperature. These compounds are ubiquitous in indoor and outdoor air and play an important role in the increase of tropospheric ozone and the generation of other oxidants, and they can also directly produce secondary pollutants such as organic aerosols. More importantly, some compounds in VOCs, such as benzene and 1,3-butadiene, have potential carcinogenic effects. Therefore, research on the existence, source, distribution, migration and transformation of VOCs in the environment and their impact on human health has been carried out. People's attention, and ...

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Problems solved by technology

[0008] Another object of the present invention is to solve the technical problems of low adsorption efficiency of some VOCs and replacement of adsorption tubes in the prior art for sampling with adsorbent tubes; to provide a long-term use of a low-temperature condensation and concentration method with an empty capillary column On-line volatile organic compound analyzer and its application method

[0009] Another purpose of the present invention is to solve the existing technical problems of single gas path sampling and dual-machine detection of C2-C12 hydrocarbons in the existing on-line detection technology; a dual gas path simultaneous sampling is provided to concentrate C2-C5 and C5 respectively -C12 hydrocarbons, an online volatile organic compound analyzer for simultaneously detecting C2-C12 hydrocarbons in one machine and its application method

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