Practice of Independent Operation Technology Transformation of Hydrogen System in Continuous Reforming Unit
The 1#continuous reforming unit of Yangzi petrochemical adopts the first generation process technology of UOP in the United States.The original design of the hydrogen purification system is connected to the reaction system.When the reaction system fails for maintenance,the hydrogen system must be shut down synchronously.The hydrogen users of the aromatics complex are forced to shut down synchronously or reduce the load,which seriously affects the stable operation and efficiency improvement of the complex.Through simple modifications,firstly,an isolation valve was added between the hydrogen system and the reaction system.Secondly,a pipeline from the hydrogen system to the safety valve was added.Thirdly,an instrument was added to the hydrogen inlet buffer tank as a monitoring table,achieving isolation between the hydrogen system and the reaction system.The reaction system continued to be maintained,and the hydrogen system was pressurized by introducing hydrogen into the pipeline network,continuing to supply hydrogen downstream without affecting the load of the hydrogen device.The goal of independent operation of the hydrogen system without starting the reaction system has been achieved,solving the problem of insufficient hydrogen during reforming maintenance.
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