KOD Case Study

Chemical Industry Digest - - Compressor -

For­tu­nately, the au­thor has faced no KOD in­ad­e­quacy prob­lem. The plant needed to shut down its 3 bar­rel cen­trifu­gal com­pres­sor, in­volv­ing 2 days shut­down to re­new the eroded in­ter­me­di­ate cas­ing last wheel labyrinth set. The au­thor con­cluded from laby vis­ual in­spec­tion that the syn­the­sis gas car­ried wa­ter eroded the labys – the root cause.

The tech ser­vices en­gi­neers, the plant’s trou­bleshoot­ers af­firmed that no wa­ter car­ry­over like­li­hood from the 1st and 2nd bar­rels in­let MEs ex­it­ing 60 bars of syn­thetic gas. Nev­er­the­less, they of­fer no other rea­son for the laby ero­sion. A tech jour­nal ad on Su­per Ef­fi­cient KOD (SEKOD), ca­pa­ble of co­a­lesc­ing even sub-mi­cron sized and emul­si­fied par­ti­cles and drain­ing th­ese pe­ri­od­i­cally, at­tracted au­thor’s at­ten­tion. Since no other so­lu­tion was ap­par­ent, the man­age­ment au­tho­rized the au­thor to in­stall the SEKOD, as its neg­li­gi­ble cost com­pared to laby ero­sion losses. Thanks to the SEKOD in­stalled, down­stream ex­ist­ing KOD dur­ing the fol­low­ing TA Laby ero­sion and its as­so­ci­ated huge losses van­ished for­ever.

Crew changed the laby sets at 8-year in­ter­vals, if nec­es­sary, dur­ing the sched­uled TAs, as an abun­dant cau­tion.

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