System for automatic sampling and detection of on-line gas by high-temperature and high-pressure simulator and detection method thereof

A system for automatic sampling and detection of on-line gas by high-temperature and high-pressure simulator, comprising an automatic control program system and a vacuum system, wherein the automatic control program system controls the vacuum system;

• the vacuum system comprises a vacuum manifold I and a vacuum manifold II;
• an outlet conduit of a high-temperature and high-pressure kettle is connected to a front end of the vacuum manifold I through a pneumatic valve;
• the pneumatic valve is successively connected to an electromagnetic valve and an air compressor;
• the vacuum manifold I is successively connected to, from a front end to a back end, a pressure controller, a gas-liquid separator, a gas automatic metering collector, a first trace quantitative gas collector, and a mechanical pump;
• a terminal end of the vacuum manifold I is connected to a high-vacuum six-way valve of a gas chromatograph;
• the gas-liquid separator is connected to a cold trap;
• the first trace quantitative gas collector is connected to a first power source;
• on the vacuum manifold II, from a front end to a back end, a high-low pressure convertor, a second trace quantitative gas collector, a gas transferring device, a heavy oil trap, a filtering trap, and a pressure gage head are connected successively;
• a terminal end of the vacuum manifold II is connected to a sample introduction port of the gas chromatograph;
• the second trace quantitative gas collector is connected to a second power source;
• the gas transferring device is connected to a carrier gas;
• a terminal end of the vacuum manifold II is connected to a terminal end of the vacuum manifold I, constituting a loop;
• a back end of the first trace quantitative gas collector on the vacuum manifold I is connected to a back end of the filtering trap on the vacuum manifold II through a vacuum manifold III, constituting another loop.