Saturator and natural gas reforming system provided with same

摘要

Provided are a saturator and a natural gas reforming system that make it possible to more efficiently recover and use heat from a heat source and to maximize the amount of water vapor added to a fluid. The saturator (20) comprises: a flow path inside of which a first fluid flows; a first heat exchange unit (22) that causes heat exchange between the first fluid and a second fluid; a second heat exchange unit (23) that causes heat exchange between a third fluid and the first fluid after the first fluid has passed through the first heat exchange unit (22); a humidifying unit (26) that adds water to the first fluid upstream from the first heat exchange unit (22) and the second heat exchange unit (23); and a conveyance path that conveys the third fluid after heat exchange from the second heat exchange unit (23) to the upstream side of the first heat exchange unit (22) and causes said third fluid to flow into the flow path as the first fluid. The first fluid is heated and humidified at the first heat exchange unit (22), the second fluid is cooled and discharged to outside of the system, the first fluid is heated at the second heat exchange unit (23) and humidified to saturation vapor pressure before being discharged to outside of the system, and the third fluid is cooled.