Special detection device for analyzing three-channel mine drainage gas

Abstract

The invention discloses a special detection device for analyzing three-channel mine drainage gas, belonging to the field of detection equipment for a mine. The special detection device comprises a gas chromatograph, a signal collecting card and a management work station, wherein a first chromatographic column, a second chromatographic column and a third chromatographic column are arranged in the gas chromatograph; and the first chromatographic column is connected with a thermal conductivity detector. The special detection device is characterized in that the second thermal conductivity detector and the third thermal conductivity detector are respectively correspondingly connected with a first hydrogen flame detector and a second hydrogen flame detector, which are mutually independent, and a nickel catalytic agent converter is arranged between the second chromatographic column and the first hydrogen flame detector; the thermal conductivity detector, the first hydrogen flame detector and the second hydrogen flame detector are respectively correspondingly connected with three input ends of the signal collecting card, and the signal collecting card is connected with the management work station. According to the detection device, the chromatographic columns and the detectors are in one-to-one correspondence, so that spectral peaks of more than two gases are prevented from overlapping in the prior art, the time for waiting the wrong peaks is saved, and the analysis detection period of the sample gas in the mine is shortened.

Description

technical field [0001] The invention belongs to the field of detection equipment for mines, and in particular relates to a special detection device for mine gas analysis. Background technique [0002] In recent years, with the enhancement of mine safety awareness, the fire spontaneous combustion bundle tube monitoring system has gradually been widely used in the coal industry. Under the control of the control cabinet, the gas circuit is automatically switched through the control cabinet to detect the sample gas, and the possible risk of spontaneous combustion and explosion is analyzed through the gas change trend diagram and the principle of triangular explosion analysis, so as to realize the early warning of spontaneous combustion and explosion in underground fires and avoid accidents. [0003] At present, the main detection equipment used is a two-channel chromatograph, which is used to detect the concentration of eight gases: oxygen, nitrogen, carbon monoxide, carbon diox...

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Problems solved by technology

[0005] However, in actual use, due to the aging of the chromatographic column and unstable gas flow, the positions of the peaks in each chromatographic column often shift, resulting in overlapping peaks of two or more gases in the detected sample gas, resulting in partial gas missed detection, affecting the detection results of the system

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