Device, method and system for detecting energy source gas

Abstract

The invention relates to a device, a method and a system for detecting energy source gas. The device comprises a main cavity, a gas inlet valve and a gas outlet valve, wherein the inside of the main cavity has a cylindrical shape and is used for storing gas to be detected; the gas inlet valve is positioned on the main cavity and used for filling the gas to be detected into the main cavity; the gas outlet valve is positioned on the main cavity and used for discharging the gas to be detected; the two ends of the main cavity have sealing structures; a double-reflection concave mirror is arranged inside the sealing structure at one end; a quartz window is arranged in the middle of the sealing structure at the other end; and terahertz (Thz) wave which is emerged through the quartz window is received by the double-reflection concave mirror, subjected to double reflection and output through the quartz window. By using the device, the method and the system for detecting the energy source gas in the embodiment of the invention, under the condition of not changing the fixed light path of equipment, the problems of narrow detecting space, short light path, low gas cavity pressure resistance and the like in the mainstream Thz experimental equipment at present are solved, and technical support is provided for the Thz measurement of nonpolar molecular gas in the energy source gas.

Description

technical field [0001] The present invention relates to the field of petroleum and petrochemical technology, in particular to the field of energy gas detection technology, in particular to an energy gas detection device, method and system. Background technique [0002] Gas energy such as natural gas, ethylene, acetylene, etc., as one of the main energy types today, has attracted more and more attention. The characterization, detection and detection of energy gases are also becoming more and more important. [0003] As the most typical energy gas, natural gas has been extensively studied in various aspects such as its exploration, exploitation, storage, transportation and use. 1. In terms of exploration, my country has abundant natural gas reserves, and the current proven reserves are about 47-48 trillion cubic meters. Natural gas can be divided into organic and inorganic origin gas according to its origin, and the methods of identification generally include isotope identif...

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Problems solved by technology

2. In terms of mining, H 2 S, H 2 O.CO 2 Such gases have brought adverse effects on many aspects such as life safety and instrument corrosion. For example, when operating natural gas wells, H 2 The detection and alarm method of S gas is very passive and fixed, which cannot meet the important safety requirements such as hierarchical alarm and downhole concentration early warning.

[0007] However, most energy gas molecules such as CH 4 、H 2 、C 2 h 6 、C 2 h 2 etc. belong to non-polar molecules, and THz waves have a weak absorption effect on non-polar molecules. The energy gas detection system in the prior art has a small space, so that terahertz waves cannot effectively detect energy gases. Therefore, for non-polar The detection of molecular gas samples is more difficult

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