| 摘要 |
PURPOSE:To improve measurement precision and reduce operation cost by providing a flow meter at the sample introduction part of a sampling pipe and nearby a gas analyzer. CONSTITUTION:Sample gas in a dry well 12 is sucked by a sampling pump 24 and guided to the sampling pipe 14, and then dehumidified by a cooler 16; almost all of the dehumidified sampling gas SG is guided to return piping 22 through a by-pass pipe 72 and the remainder enters the gas analyzer 20. An H2 concn. and O2 concn. of the SG entering the analyzer 20 are measured by a heat conduction type hydrogen gas detector and a magnetic wind type oxygen detector and the gas is admitted into the piping. The SG in the piping 22 is returned to the dry well 12 through the pump 24. Vapor condensed by the cooler 16, on the other hand, is discharged into a suppression chamber through piping 70. Thus, the H2 concn. and O2 concn. after the analysis 20 are corrected with measured values of a manometer 58, thermometer 60, differential pressure gauge 62, manometer 64, thermometer 66, and differential pressure gauge 68 to detect the H2 concn. and O2 concn. in the dry well 12. |
