| 摘要 |
Apparatus for purifying feed air by adsorption of water vapour and carbon dioxide therefrom comprises a purification vessel 4 in which are defined vertically arrange chambers 14 and 18, and another purification vessel 6 in which are defined vertically arranged chambers 16 and 20. None of the chambers 14, 16, 18 and 20 is in a series flow relationship with any of the others. Each chamber 14, 16, 18 and 20 contains a bed 22 of one or more adsorbents 24, 26 which is able to adsorb water vapour and carbon dioxide from the feed air and which forms a reversible part of a gas flow path extending between locations external of the vessels 4 and 6. Valves 38, 44, 52, 58, 64, 70 and 72 are associated with the said vessel and are operable to permit during a first adsorption period of time simultaneous flows of air to purified through at least two of the chambers 14, 16, 18 and 20, and during a second regeneration period of time simultaneous reverse flows of regeneration gas through the same chambers. <IMAGE> |
