| 摘要 |
In the production of water vapor, particularly in the production of especially clean water vapor, dissolved gases, mainly atmospheric gases, are removed from feed water. The feed water is sprayed by a spray nozzle mounted in a hemispherical chamber in a spray pattern which matches an area of an upper end of an arrangement of vertical feed tubes of a falling film evaporator. The dissolved gases are liberated quickly from the sprayed droplets and removed through outlets in the hemispherical chamber. The sprayed droplets collect at the upper ends of the vertical evaporation channels and are distributed evenly thereamong before atmospheric gases can be redissolved.
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