Analysis device and analysis method for quality index of natural gas product and application

A device for analyzing quality indicators of a natural gas product, the device comprising a sample loading assembly, and first, second, third, fourth, and fifth chromatographic column analysis systems connected in parallel, wherein the first chromatographic column analysis system is configured for separating sulfides from the natural gas;

• the second chromatographic column analysis system is configured for separating hydrocarbons having C3 and higher from the natural gas;
• the third chromatographic column analysis system is configured for separating oxygen, nitrogen, methane, and carbon monoxide from the natural gas;
• the fourth chromatographic column analysis system is configured for separating carbon dioxide and ethane from the natural gas;
• and the fifth chromatographic column analysis system is configured for separating helium and hydrogen from the natural gas;
• wherein
• each chromatographic column analysis system is provided with a quantitative tube, a carrier gas tube, and a chromatographic column, the quantitative tube is configured for storing a natural gas sample, and the carrier gas tube is configured for delivering a carrier gas to the chromatographic column analysis system to subject the natural gas sample in the quantitative tube to a component separation within the chromatographic column;
• the sample loading assembly is connected to the quantitative tubes of the first, second, third, fourth, and fifth chromatographic column analysis systems in a connection/disconnection controllable manner to provide the natural gas sample to the quantitative tubes of the first, second, third, fourth, and fifth chromatographic column analysis systems;
• and
• each chromatographic column analysis system is connected to a corresponding detector, respectively.