Method for detecting liquid height in stirred tank reactor

Abstract

The invention discloses a method for detecting the liquid height in a stirred tank reactor, including the following steps: (1)arranging an acoustic emission signal received device at the outer wall of the reactor; (2)receiving the acoustic emission signal in the stirred tank reactor; (3)selecting the average energy E of the acoustic emission signal at the wall of the stirred tank reactor as the characteristic variables; (4) judging the liquid height in the stirred tank reactor by the characteristic energy E of the acoustic emission signal stirred tank al at the wall of the stirred tank reactor according to the forecast model or standard curve of the predetermined characteristic variables E and the liquid height in the reactor. The acoustic emission signal received device for the method is non-inserted, and has convenient installation, safety and environment protection, sensitive response, accurate measure, wide application range and the like.

Description

technical field [0001] The invention relates to a method for detecting the liquid level height of a reactor, in particular to a method for detecting the liquid level height of a stirred tank reactor. Background technique [0002] The liquid level reflects the content of the material in the reactor. As an important operating parameter in the continuous chemical production, keeping it relatively stable is of great significance for controlling product performance and stable operation of the reactor. If the liquid level is too low or too high, it will cause abnormalities in the reactor. For the stirred tank reactor: the low liquid level will cause: 1) The average residence time of the catalyst is reduced, the yield is reduced, and the space-time yield of the reactor is reduced; 2) The liquid level in the reactor is too low, and the catalyst directly Spraying on the inner wall of the reactor or the bare surface of the agitator may produce fibrous and blocky polymers. A higher l...

AI Technical Summary

Problems solved by technology

At present, the liquid level detection instrument equipped on the industrial stirred tank reactor is a radiation liquid level detector using radioactive rays, which has some shortcomings, such as being harmful to the operator; the specific value of the liquid level cannot be obtained; when the operating conditions in the tank change Readings can also vary; and its main disadvantage is that it cannot be used at higher operating temperatures

The above problems ultimately lead to the operator being unable to determine the real situation of the liquid level in the reactor

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