A number of typical interlocking shutdown incidents have occurred in an alkylation spent acid regeneration unit in Ningbo since its start-up.The process principle and technical characteristics of the spent acid regeneration unit are presented,the causes of the interlocking shutdown incidents are analyzed,the optimization measures are proposed such as single measurement point interlocking optimization and improved process operation methods,thereby ensuring the long-term safe and stable operation of the spent acid regeneration unit.
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