The butene-1 unit comprises a deisobutane tower, a butene purification tower, a butene-1 tower, and other equipment; these towers include both tray columns and packed columns. The principal internal components encompass metal packings, liquid distributors, liquid collectors, packing support grids, packing grid supports, tray assemblies (including floating valves, tray decks, downcomers, receiving trays, liquid seal trays, and their corresponding support beams), oil collection tanks, gas–liquid feed distributors and distribution pipes, as well as fasteners such as bolts, nuts, clamps, and washers.

● Single- and Double-Overflow Tray- Single-overflow tray / Double-overflow tray / Floating valve / Structured packing

 

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