Online acoustic emission detection of multi-layer wrapped ammonia converter

Acoustic emission (AE) detection technology is used for on-line detection and diagnosis of multi-layer wrapped ammonia converter. Because the ammonia converter is in high temperature and complex working environment, the finite element method is used for simulation analysis, the wave guide rod is used to collect the acoustic emission signal of the equipment. According to the collected signals, the source position of acoustic emission signal is determind, and the magnetic particle and ultrasonic testing method are used to recheck it. The characteristics of acoustic emission signal source are analyzed, and the causes are speculated. The online test results can help to diagnose whether the equipment is safe or not.