Enrichment device and method for trace single hydrocarbon component in dry natural gas

The invention provides an enrichment device and method for trace single hydrocarbon components in dry natural gas, the device is provided with a gas enrichment mechanism, the gas enrichment mechanism is connected with a gas chromatography through a four-way valve and a gas sensor, a natural gas sample can be introduced into the gas chromatography, and then the gas sensor is used for identifying target components to be enriched; effective enrichment of hydrocarbon target components is realized in combination with the passage regulation and control effect of the four-way valve; a sampling mechanism is connected with the gas enrichment mechanism through a first electromagnetic valve, an isotope ratio mass spectrometer is connected with the sampling mechanism, and a vacuum pump is connected with the device through a second electromagnetic valve and used for forming vacuum to create a differential pressure environment; the control module is used for collecting real-time data and automatically controlling each comp