| 摘要 |
PURPOSE:To directly and rapidly measure a hydrogen converting ratio with respect to the reactor such as the recombiner of an off-gas system, by providing a separator equipped with a hydrogen permeable membrane and a flowmeter to the bypass pipe bypassing the reactor. CONSTITUTION:When off-gas containing hydrogen, oxygen, nitrogen and steams flows in a recombiner 8, the greater part of hydrogen and oxygen are bonded by a catalyst 17 to generate steam and the off-gas passing through the catalyst 17 flows out to the piping 11 of an off-gas system on the downstream side. At this time, difference is generated between the hydrogen partial pressures on the upstream and downstream sides of the hydrogen permeable membrane 22 of the hydrogen converting ratio measuring device 15 provided so as to bypass a reactor 16. Hydrogen transmits through the hydrogen permeable membrane 22 by the difference between the hydrogen partial pressures to flow from the upstream side to the downstream side. The transmitting flow rate of this hydrogen is measured by a flowmeter 20 and the concn. of hydrogen is calculated from the calculated difference between the hydrogen partial pressures to make it possible to easily obtain a hydrogen converting ratio.
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