Method and device for detecting state and fault diagnosis of radial reactor of moving bed by using acoustic emission

Abstract

The invention discloses a method and device for detecting a state and fault diagnosis of a radial reactor of a moving bed by using acoustic emission, and relates to the technical field of reactor fault diagnosis. The method comprises the following steps of arranging acoustic emission sensors connected with a waveguide rod or acoustic emission sensors not connected with the waveguide rod on the outer wall surface and an inner component of the radial reactor of the moving bed, then connecting the acoustic emission sensors with an acoustic emission signal acquisition system, employing a software analysis system to perform waveform analysis, parameter analysis and power spectrum analysis on acoustic emission signals, judging the operation state of the reactor according to the analysis results, and performing fault diagnosis. The method for fault diagnosis of the radial reactor of the moving bed by using acoustic emission has the advantages of real-time online, convenience and sensitivity, and is a non-invasive nondestructive testing technology. The fault diagnosis device and the method provided by the invention are beneficial to maintaining long-term stable operation of the moving bed reactor and the whole operation unit.

Description

technical field [0001] The invention relates to the technical field of reactor fault diagnosis, in particular to a method and device for detecting the status and fault diagnosis of a moving bed radial reactor by using acoustic emission. Background technique [0002] Moving bed radial reactors are widely used in catalytic reaction and environmental protection, especially in catalytic reforming in petroleum refining industry, propane dehydrogenation in chemical industry, toluene disproportionation, tail gas desulfurization, etc. have been successfully applied. In the moving bed radial reactor, the catalyst particles and the gas flow in a cross-flow mode, the catalyst particles flow downward under the action of gravity, and the gas flows horizontally in the bed. When the air velocity is high, there will be two abnormal operating states of the cavity and the wall. The generation of the cavity makes the distribution of the gas phase along the axial direction become uneven until ...

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Problems solved by technology

[0005] In fact, there is not a one-to-one relationship between the circulation amount of the catalyst in the moving bed reactor and the state of the reactor cavity and the wall. The change of multiple factors can change the circulation rate of the reactor. Therefore, only the catalyst circulation is measured. Velocity cannot determine if there are cavities or attached walls in the reactor

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