The ethylene plant comprises an propylene column, an ethylene column, a demethanizer, a light fuel oil stripper, a process water stripper, a high-pressure depropanizer, a low-pressure depropanizer, a deethanizer, a butane stripper, a spent caustic oxidation hydrocarbon removal column, a spent caustic oxidation water-washing column, an quench water column, and an quench oil column. These columns include both tray columns and packed columns, with the principal internal components comprising metallic random packing, coalescing packing, liquid distributors, liquid collectors, packing support grids, packing grid supports, tray assemblies (including float 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-, double-, and four-overflow tray – Single-overflow tray / Double-overflow tray / Four-overflow tray

● Float valve- BV-T floating valve / corrugated guide floating valve / BV-T fixed valve

 

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