On the basis of the analysis of the current hydraulic decoking monitoring system, it is proposed that use optical fiber Bragg grating (FBG) vibration sensor and fiber Fabry-Perot (FP) acoustic sensors to online monitor vibration signal and audio signal hydraulic of the coke drum in the running state progress, analysis the vibration sensor and acoustic sensor used in the system. Based on the actual monitoring results in Sinopec Wuhan Branch , the fiber optic acoustic emission sensors is more suitable for the hydraulic decoking online monitoring system than the FBG vibration sensor ,which can more accurate monitor of hydraulic decoking.
We present that an improved optical fiber acoustic emission sensor has been applied to the hydraulic decoking on-line monitoring system for the first time, meanwhile the characteristics of the improved acoustic emission sensor are analyzed. The actual research results of China Petrochemical Wuhan Petrochemical Corporation Group show that hydraulic decoking on-line monitoring system can monitor the real-time and accurate states of hydraulic decoking based on the optical fiber acoustic emission sensor technology, the system can realize the automation of hydraulic decoking monitoring effectively.
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