The gasoline hydrotreating unit primarily comprises the decarbonization five-column, decarbonization nine-column, and stabilization column, among others. The principal internal components include metal packings, liquid distributors, liquid collectors, packing pressure grids, packing grid supports, tray assemblies (including floating valves, tray decks, downcomers, receiving trays, liquid seals, 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 / fixed valve / structured packing / random-packed rectangular saddle ring packing

 

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