ANALYSIS ON ABNORMAL TEMPERATURE RISE OF COLD BOX IN PURGE GAS RECOVERY SYSTEM AND TREATMENT
Linde cryogenic purge gas recovery process in synthetic ammonia plant was introduced.Taking an example of abnormal temperature rise of the cold box in a practical plant,it's searched from process,equipment and instrument to find the fundamental reasons of the accidents,such as tube leakage in heat exchanger and failure of on-line ammonia content analyzer.Corresponding measures were taken to release the hidden troubles.To provent similar problems from happening again,the optimizing and on-line detection measures were presented to enable the stable operation.