Analysis and Countermeasures of Corrosion and Internal Leakage of Thread Locking Ring Heat Exchanger in Hydrogenation Upgrading Unit
In view of the problems of ammonium salt crystallization and internal leakage in the heat exchanger of high pressure thread locking ring in the hydrogenation upgrading unit,the working conditions of the high pressure thread locking ring heat exchanger in the environment containing sulfur and chlorine were investigated and studied.By strengthening the dehydration of raw oil,increasing the outlet temperature of the shell-and-tube side of the high-pressure thread-locked ring heat exchanger,optimizing the position of water injection point and total water injection quantity,etc.,the ammonium salt crystallization of the reaction effluent system was effectively avoided,and corrosion rate was decreased,the long-term operation of the plant was realized.
Hydrogenation upgrading unitThread locking ring heat exchangerAmmonium chlorideCorrosion
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