Multi-component detection system based on single column
A detection system and multi-component technology, applied in the field of chromatography, can solve the problems of complicated valves, chromatographic columns and gas paths, complicated double-valve and double-column gas paths, unfavorable installation and maintenance, etc., and achieves reduced maintenance, simple structure and low cost. Effect
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Embodiment 1
[0029] figure 1 Schematically presents a simplified structural diagram of a multi-component detection system based on a single column in an embodiment of the present invention, as shown in figure 1 As shown, the multi-component detection system based on single column comprises:
[0030] Quantitative loop 81, there is only one multi-way valve 71 directly connected with only one quantitative loop 81;
[0031] A multi-way valve 71, the two ends of the quantitative loop 81 are respectively connected to the ports of the multi-way valve 71;
[0032] Sample gas inlet 41, calibration gas inlet 42, carrier gas inlet 43, hydrogen inlet 44, oxygen inlet 45 and calibration gas outlet 46, filters are arranged downstream of each gas inlet;
[0033] A chromatographic column 61, the two ends of the only one chromatographic column 61 are respectively connected to the port of the multi-way valve 71;
[0034] figure 1 Schematically provides the structural diagram of the chromatographic colum...
Embodiment 2
[0042] An application example of the single-column-based multi-component detection system in the detection of non-methane total hydrocarbons according to Embodiment 1 of the present invention.
[0043] In this application example, if figure 1 As shown, the only one multi-way valve, the only quantitative loop and the gas circuit adopt the existing technology;
[0044] Such as figure 2 As shown, the chromatographic column in this application example adopts a dual-channel concentric composite chromatographic column. The center is the first channel, which is an inertized empty column for separating total hydrocarbons; To separate methane; the cross section of the first channel perpendicular to the direction of its internal fluid flow velocity is circular, the cross section of the second channel perpendicular to the direction of its internal fluid flow velocity is circular, the output of the first channel and the second channel The air resistance of the cylindrical structure is ...
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