Gas treating system applicable to online carbon dioxide measuring

Abstract

The invention discloses a gas treating system applicable to online carbon dioxide measuring and relates to the technical field of measuring. The gas treating system comprises a carbon dioxide separating and collecting unit and a fine control injecting unit, wherein the carbon dioxide separating and collecting unit comprises a first two-position six-way selection valve which is respectively connected with an element analyzer, a carbon dioxide molecular sieve, a vacuum pipeline and a helium tank, and the vacuum pipeline comprises a dual-ring cold-trap pipe and a cross quantitative pipe which are connected; the fine control injecting unit comprises a four-position selection valve and a second two-position six-way selection valve, and the second two-position six-way selection valve is respectively connected with the four-position selection valve, an ion source, a precise-temperature-control cold trap and the helium tank. The gas treating system has the advantages that freeze separation and storage are performed on the carbon dioxide released by the combustion of the element analyzer, the carbon dioxide is injected into the ion source in a fine control manner by the pressure difference between a carbon dioxide tank and the gas ion source, and the flow speed of the carbon dioxide flowing into the ion source is determined according to the calibrated pressure of the carbon dioxide.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a gas processing system suitable for on-line measurement of carbon dioxide. Background technique [0002] Usually, for organic solid carbon samples, our treatment process is high-temperature oxidation and combustion of solid carbonaceous substances, low-temperature freezing and separation to collect carbon dioxide gas, and then catalytic reduction into solid elemental carbon required for measurement, and then measurement. The whole process is often operated separately, which is cumbersome and lengthy, and it is easy to introduce errors, especially when dealing with trace samples. The measurement error is large, and the sample preparation is time-consuming and labor-intensive. Therefore, we want to establish a system that can burn the solid at the front end of the sample as it is. The measurement backend is directly connected to the intermediate gas processing system for onli...

AI Technical Summary

Problems solved by technology

The whole process is often operated separately, which is cumbersome and lengthy, and it is easy to introduce errors, especially when dealing with trace samples. The measurement error is large, and the sample preparation is time-consuming and labor-intensive. Therefore, we want to establish a system that can burn the solid at the front end of the sample as it is. The measurement backend is directly connected to the intermediate gas processing system for online measurement, which directly saves some processing links and realizes the automatic injection mode of micro samples, which is not only conducive to the integration of purification technology and measurement technology, but also realizes the current large scientific data. Rapid, large-scale and micro-sample analysis and testing requirements, promoting technological innovation and applied research fields of carbon dioxide gas measurement

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