Amine liquid regeneration cycle system

The invention provides an amine liquid regeneration cycle system. The amine liquid regeneration cycle system comprises a regeneration module and a process sub-line pipe, the liquid inlet end of the flow sub-line pipe is connected with the barren liquor outlet of the regeneration module, and the liquid outlet end of the flow sub-line pipe is connected with the rich liquor inlet of the regeneration module, so that the regeneration module and the flow sub-line pipe form a closed circulating pipeline. The amine liquid regeneration cycle system provided by the invention can realize internal self-circulation during shutdown of a coking device and a hydrogenation device and normal operation of a tail gas absorption tower of a sulfur production system, thoroughly displaces barren liquor and rich liquor pipelines, and ensures comprehensive maintenance of a gasoline processing system; the situation that maintenance time is shortened due to start-up, stop, construction and purging time prolonging is avoided, and the tec