Introduction to Hydrogen Recovery
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Published Time:
2022-04-22 11:36
Hydrogen recovery refers to a system that treats hydrogen gas discharged from industrial production processes, removing dust, oil, oxygen, and water, to restore the hydrogen quality to meet production requirements, enabling its reuse in a secondary cycle.
The discharged hydrogen gas, containing solid and gaseous impurities, is passed through a filter to remove most of the solid impurities. It then enters a scrubber where water removes gaseous impurities and ammonia. After passing through a cooling system for heat exchange, the hydrogen dew point decreases from 43-47℃ (at furnace exit) to 15℃. Approximately 90% of the water is removed during scrubbing and cooling. This water is separated by a vapor-liquid separator. The remaining water in the hydrogen is sent to a drying tower where it is adsorbed by silica gel and molecular sieves to reach the required dew point. Finally, the purified hydrogen is recycled.
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