Monitoring system and monitoring method for continuous on-line observation of trace gas mercury

Abstract

The invention relates to a monitoring system for continuous on-line observation of trace gas mercury and a monitoring method. The system comprises two electromagnetic diaphragm pumps, two circulatingdiaphragm gas pumps, a mercury collecting trap, a nanocomposite particle film sensor and a main control circuit, wherein a system gas inlet, the first electromagnetic diaphragm pump, the mercury collecting trap, the first circulating diaphragm gas pump, the second circulating diaphragm gas pump and a system gas outlet are connected in sequence; the first electromagnetic diaphragm pump is connectedwith the gas inlet of the nanocomposite particle film sensor through a pipeline; the gas outlet of the nanocomposite particle film sensor is connected with the second circulating diaphragm gas pump through a pipeline; the second circulating diaphragm gas pump is connected with the second electromagnetic diaphragm pump through a pipeline; the sensing signal output terminal of the nanocomposite particle film sensor is connected with the main control circuit. The system adopts a gas circulation method, detects mercurial vapor released by the mercury collecting trap through the nanocomposite particle film sensor, is high in response signals and response speed, and can perform on-line continuous observation on the concentration change of the trace gas mercury.

Description

technical field [0001] The invention relates to the technical field of mercury gas trace observation, in particular to a monitoring system and method for continuous on-line observation of trace gas mercury, which is mainly used for underground fluid analysis and short-term earthquake prediction, and can also be used for mercury in the atmosphere Analysis of gas content. Background technique [0002] Fault zones record the rock and fluid properties closely related to earthquakes, and are also rich in information on the breeding and occurrence of earthquakes. Fluid migration and inhomogeneous penetration can generate huge local principal stress on faults, making faults lose stable and cause an earthquake. A large number of simulation tests and actual earthquakes have shown that mercury (Hg) element plays an important role in revealing the relationship between fault zone fluid and earthquake genesis. Mercury in the lower crust and upper mantle migrates to the surface along fa...

AI Technical Summary

Problems solved by technology

However, the signal response of the sensor used in this detection method is weak at present, and there are defects in the actual application that the adsorption equilibrium time is too long, the film structure has memory, and the detection instrument is easily affected by the ambient temperature and humidity, and the stability is poor , can not meet the needs of rapid, online continuous, long-term observation

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