Sample gas intake system for on-line gas chromatographic detection
A technology of air intake system and gas chromatography, which is applied in the field of gas analysis, can solve the problems of sample gas sampling lag and easy damage of sampling pumps, and achieve accurate detection results and good stability
Pending Publication Date: 2018-04-10
HEFEI GOLD STAR MECHATRONICS TECH DEV CO LTD
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The invention discloses a sample gas intake system for on-line gas chromatographic detection. According to the invention, the gas inlet end of a sampling pump is connected with a gas source, and the gas outlet end of the sampling pump is connected with a first gas inlet of a reversing valve assembly; the gas inlet of a quantitative sample gas storage unit is connected with the first gas outlet ofthe reversing valve assembly, and the gas outlet of the quantitative sample gas storage unit is connected with the second gas inlet of the reversing valve assembly; the second gas outlet of the reversing valve assembly is connected with a first exhaust port via a buffer tank; a carrier gas pipeline is connected with the third gas inlet of the reversing valve assembly; and the third gas output of the reversing valve assembly is connected with a detection unit. The sampling pump pumps sample gas to the quantitative sample gas storage unit, and the quantitative sample gas storage unit is connected with the buffer tank, so the sample gas in the quantitative sample gas storage unit has good stability; and switching of closed circuits is carried out via the reversing valve assembly, and the sample gas with stable pressure is conveyed to the detection unit by the carrier gas for detection, so accurate detection results can be obtained.
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