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

An acoustic emission sensor and moving bed technology, which is applied in the direction of material analysis, chemical instruments and methods, and measuring devices using acoustic emission technology, can solve the problem of not being able to determine whether there is a cavity or a wall in the reactor, and achieve long-term maintenance. The effect of stable operation, simple and easy installation, and timely fault monitoring and diagnosis

Pending Publication Date: 2021-06-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 mult

Method used

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

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Embodiment 1

[0046] The operating state of the acoustic emission detection reactor provided in this embodiment and the fault diagnosis system (device) refer to figure 1 shown by figure 1 The fault diagnosis system shown detects the mutual motion state of gas and catalyst particles in the moving bed radial reactor, and performs acoustic emission signal collection and fault diagnosis of the continuous reforming unit. In this embodiment, the continuous reforming unit has four moving bed radial reactors with different diameters and one moving bed regenerator, wherein the inner diameter of the first reactor is 2500 mm, and the average particle size of the catalytic reforming catalyst is 1.5 mm. figure 1 Only one of the moving bed radial reactors and regenerators and the flow diagram of the catalyst circulation system are shown in .

[0047] In the acoustic emission detection reactor operating status and fault diagnosis system, the oil and gas from the heating furnace enters the reactor 7 from ...

Embodiment 2

[0056] This embodiment provides a method for fault diagnosis of a moving bed hydrocarbon dehydrogenation device by using acoustic emission, and detects the state of mutual movement of gas and catalyst particles in a moving bed radial reactor. Using the same acoustic emission fault diagnosis system as in Example 1, acoustic emission sensors were installed on the outer wall and internal components of the moving bed hydrocarbon dehydrogenation device. If necessary, a waveguide rod can be added, and an acoustic emission sensor can be arranged at one end of the waveguide rod.

[0057] The sampling time of the acoustic emission signal acquisition system is set to 15s, and the sampling frequency is 1MHz to collect the acoustic wave signal on the outer wall of the moving bed hydrocarbon dehydrogenation reactor. Turn on the signal processing system, analyze the ASL, energy, absolute energy, impact number and other parameters of the acoustic emission signal of the moving bed hydrocarbon...

Embodiment 3

[0059] This embodiment provides a method for fault diagnosis of a moving bed aromatization process device by using acoustic emission. In this example, the aromatization process device has two moving bed radial reactors with different diameters. Acoustic emission sensors are installed on the outer wall surface of the radial reactor of the moving bed and at different axial and circumferential positions of the internal components, and are connected to the signal amplification acquisition and processing system.

[0060] The sampling time of the acoustic emission signal acquisition system is set to 15s, and the sampling frequency is 1MHz to collect the acoustic wave signal on the outer wall of the moving bed hydrocarbon dehydrogenation reactor. Turn on the signal processing system, analyze the ASL, energy, absolute energy, impact number and other parameters of the acoustic emission signal of the moving bed hydrocarbon dehydrogenation reactor, and analyze the power spectrum of the aco...

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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 ...

Claims

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Application Information

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IPC IPC(8): G01N29/14G01N29/44B01J8/08
CPCB01J8/08G01N29/14G01N29/4436
Inventor 闫遂宁莫雅婧陈剑飞鲍文俊
Owner CHINA PETROLEUM & CHEM CORP
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