Selective hydrogenation unit converts C4 alkynes into high-value butadiene,which improves the economic efficiency of the unit while treating the dangerous alkynes.However,the return of hydrogenated C4 alkynes to butadiene extraction unit may increase the load of the butadiene extraction unit,especially the load of the first extraction column.In this paper,the influence of newly installed C4 alkyne selective hydrogenation unit on the load of extraction columns in butadiene extraction unit are analyzed.The results show that the hydrogenated C4 mainly consists of C4 monoolefins and alkanes,and the content of diolefin and C4 alkyne is low,leading to different trends in the increase of gas load and liquid load in the first extraction column.The gas load in the rectification section of the first extraction column increases significantly,especially in the 41st to 47th trays above the C4 feed tray near the flooding line,while the increase in liquid load is limited.The newly installed C4 alkyne selective hydrogenation unit has a negligible effect on the load of the second extraction column.
维普
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