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Sound wave detecting method for catalyzer coke content in reactor

A sonic detection and catalyst technology, which is applied in the direction of material analysis, instruments, and measuring devices using sound waves/ultrasonic waves/infrasonic waves. problem, to achieve the effect of high precision

Inactive Publication Date: 2008-07-16
ZHEJIANG UNIV
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Problems solved by technology

However, first of all, the model is only a simplification of the actual reactor, which cannot fully reflect the actual reaction situation, and the accuracy is not high; secondly, the model reflects the overall reactor, and cannot obtain the carbon deposition information of the coking catalyst in the specific partial reactor section

Method used

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  • Sound wave detecting method for catalyzer coke content in reactor
  • Sound wave detecting method for catalyzer coke content in reactor
  • Sound wave detecting method for catalyzer coke content in reactor

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Embodiment

[0041] The sonic detection method of catalyst coke amount in the reactor comprises the following steps:

[0042] 1) Receive the acoustic emission signal generated by the catalyst inside the reactor or regenerator hitting the wall; the gas-solid circulation is made of plexiglass with a height of 1000mm, an inner diameter of 150mm, a distribution plate of 2.0mm in diameter, and an opening rate of 2.6%. In the fluidized bed, air is used as the fluidizing gas, the superficial gas velocity v=0.057, 0.071, 0.085, 0.099, 0.13m / s, and the passive acoustic emission transducer is attached 25mm above the distribution plate. Under the above conditions, the acoustic emission signals of the FCC fresh catalyst and the coked catalyst at the above gas velocities were respectively measured. The acoustic emission signal frequency is 0Hz-20MHz. The frequency of the acoustic emission signal is preferably 0 Hz-1 MHz. Acoustic signals of fresh FCC catalysts at the above-mentioned gas velocities we...

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Abstract

The invention discloses a sound wave detecting method of carbon amount in a catalyst in a reaction which analyzes received sound emission signal characteristic parameters and combines a small wave analysis or small wave packet analysis method to confirm whether the catalyst is coked and the carbon amount of the coked catalyst so as to realize the real time on-line monitoring on the catalyst coking and burning processes by receiving the sound emission signal inside a fluidized bed reactor and a regeneration reactor. The invention has the advantages of sensitivity, safety, environment protection, facility and shortcut, etc., can accurately on-line analyze the carbon amount of the catalyst and the change of the carbon amount of an FCC, MTO, GTO fluidized bed section and a regenerator section which is used for guiding production.

Description

technical field [0001] The invention relates to the field of acoustic wave detection, in particular to an acoustic wave detection method for catalyst carbon deposits in a reactor. Background technique [0002] Catalyst coking phenomenon widely exists in crude oil catalytic cracking (FCC), methanol to olefins (MTO), natural gas to olefins (GTO) and other processes. The so-called catalyst coking refers to the formation of carbon deposits in the active center of the catalyst or / and in the pores of the catalyst, resulting in the reduction or disappearance of the catalyst activity. Therefore, in industrial production, the coked catalyst must be regenerated and recycled. In the catalyst reaction-regeneration system, the amount of carbon deposit determines the reaction residence time of the catalyst, the oxygen consumption of the regenerator and the regeneration time. Therefore, the detection of the carbon deposition amount of the catalyst is very important to improve the single-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/00G01N29/44
Inventor 阳永荣王靖岱虞贤波任聪静蒋斌波刘烨
Owner ZHEJIANG UNIV
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