| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated fractionating tray capable of decreasing the workload for attaching and detaching a supporting element attached to the inside of a fractionating column in the case of attaching and exchanging fractionating trays in the column and simplifying the design shape of the tray thereby lowering the installation cost. SOLUTION: The laminated fractionating tray used for the fractionation distillation of a volatile compound has a cylindrical outside column 1 sealed at the upper part and the lower part and a downcomer 13 constituted of a side wall 18 extending from a vapor-liquid contact area of an upper side 1st and a lower side 2nd fractionating trays, each of which is formed of a porous deck plate, and is constituted of a 1st and a 2nd fractionating trays, in which the 1st tray is supported by the 2nd tray in the column 1 and the 2nd tray is supported by a leg attached to the outside column 1.
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