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caustic Tower

caustic Tower

caustic Tower

(OP)
In Ethylene Cracker Plants, Caustic tower is placed between Cracked GAs Compressor Final Stage and Pre Final Stage(eg 3rd and 4th).Is there  any Technical reason behind it ? Or Its Just matter of Economics???

Your Views Please

RE: caustic Tower

Since you query for opinions I think that it is mostly economics to have the caustic tower at the high pressure end to reduce diameter. I think that a consideration for not having caustic scrubbing altogether after compression is to reduce water load on the driers via the compressor and its aftercoolers.

Its been several years since I worked in an ethylene plant, but this is what I think may lead to this common design. Others may have a even better reasoning.

best wishes,
sshep

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