Hydroprocessing units primarily comprise hydrotreating, hydrofining, hydrodesulfurization, and hydrocracking processes, with plate-type towers being the predominant configuration. These include circulating hydrogen desulfurization towers, liquefied petroleum gas desulfurization towers, dry gas desulfurization towers, hydrogen sulfide stripping towers, main stripping towers, product fractionation towers, butane removal towers, ethane removal towers, and absorption towers, encompassing both packed and plate-type towers, though plate-type towers are dominant. The principal internal components include metal random packings, coalescing packings, liquid distributors, liquid collectors, packing support grids, packing grid supports, tower 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.
● Main tower tray assemblies
(1) Single- and Double-Overflow Tray – Single-Overflow Tray/Double-Overflow Tray
(2) Combined导向浮阀
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