Horizontal type agitated bed reactor material volume detection method

Abstract

The invention discloses a horizontal stirred-bed reactor material level detection method. The method receives acoustic emission signal from the horizontal stirred-bed reactor; a acoustic signal receiving device receives outside wall vertical profile of the reactor line acoustic emission signal device on inspection time, and receives the acoustic emission signal in the stirred-bed reactor; analyzing the received acoustic signal, selecting the average energy E, amplitude A and mean-square deviation S as a character variables; the reactor material level is judged through the changes of the adjacent position acoustic signal amplitude mean-square deviation on the surface of the same circumference section outside wall of the reactor and the mean-square deviation ratio; the appropriate location is material level when the acoustic signal amplitude mean-square deviation and the mean-square deviation ratio both reach the maximum. The acoustic emission receiving device of the invention is non-plug-in, and easy and convenient to install, safe environment, rapid response, small measurement error, and has a wide applicability.

Description

technical field [0001] The invention relates to the detection of the material level of a reactor, in particular to a method for detecting the material holding capacity (material level) of a horizontal stirred bed reactor, especially a method for detecting the material level of solid pellets in polymerization kettles such as polyethylene and polypropylene. Background technique [0002] The material level refers to the relative height of the material in the reactor. As one of the parameters reflecting the flow state, it is very important for the control of the reactor load, the prevention of the formation of fibrous and lumpy materials, and the stable operation of the entire system. influences. If the material level is too low or too high, it will cause abnormalities in the reactor, such as agglomeration. Taking a horizontal stirred bed reactor as an example, too low a material level will cause: A) the average residence time of the catalyst is reduced, and the yield is reduce...

AI Technical Summary

Problems solved by technology

At present, the material level detector equipped on the industrial horizontal stirred bed reactor is a radiation material level detector using radioactive rays, and its reading is in the form of a percentage, and there is no specific definite value of the material level; when the pressure in the tank increases, the reading will change , at the same time, when the bulk density of the particles in the kettle changes, the readings also change; the main disadvantage is that when there is a lump on the stirring blade, the reflection of the rays does not match the actual situation, resulting in a false report of the material level ; In addition, radioactive rays are fatal to the human body

The above four problems ultimately lead to the operator being unable to determine the status of the material level in the reactor

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