Gas chromatographic analysis device and analysis method of MTO reactive product gas

Abstract

The invention provides a gas chromatographic analysis device and an analysis method of a MTO reactive product gas. The analysis device comprises a first analysis unit, a second analysis unit and a third analysis unit, wherein the first analysis unit is used for analyzing content of hydrocarbon gases and oxygen-containing compounds, and comprises a first ten-way valve, a first pre-separation column, a second pre-separation column, a six-way valve and a first detector which are connected in sequence, and a first chromatographic analysis column and a damping tube, two ends of the first chromatographic analysis column and the damping tube are connected with the six-way valve, and the first ten-way valve is provided with a tenth opening J connected with an air source to be detected; the second analysis unit is used for analyzing the content of H2 and comprises a second ten-way valve, a third pre-separation column, a second chromatographic analysis column and a second detector which are sequentially communicated, and the second ten-way valve is provided with a tenth opening J' connected with the air source to be detected; and the third analysis unit is used for analyzing the content of permanent gases except for hydrogen, and comprises a third ten-way valve, a third chromatographic analysis column and a third detector which are sequentially communicated, and the third ten-way valve is provided with a ten-way valve is provided with a tenth opening J'' connected with the air source to be detected. Only one instrument is needed, and the analysis time is short.

Description

technical field [0001] The invention relates to the field of gas analysis, in particular to a gas chromatography analysis device and an analysis method for MTO reaction product gas. Background technique [0002] Ethylene and propylene in low-carbon olefins are the basic organic raw materials of modern chemical industry, and their demand will be increasing. The traditional route for producing ethylene and propylene is through naphtha cracking. The disadvantage of this route is that it relies too much on petroleum. For oil, there are problems of rising prices and unstable supply and demand in a short period of time; in the long-term, there are limited resource reserves, resulting in the problem of "oil crisis". [0003] The production of light olefins such as ethylene and propylene from coal via methanol is the most promising process to replace the naphtha route to olefins. Because Shenhua Baotou Coal Chemical Branch is the world's first and the world's largest coal-to-olefi...

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Problems solved by technology

[0013] The main purpose of the present invention is to provide a gas chromatographic analysis device and analysis method for MTO reaction product gas, to solve the problems of complex and time-consuming analysis of MTO reaction product gas in the prior art

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