Detection method for reactor of fluid-bed

Abstract

A method for detecting reactor of fluidized bed includes analyzing sound emission signal received from internal of fluidized bed reactor; selecting characteristic parameter of sound wave signal to confirm material level height in fluidized bed, initial fluidizing speed, initial turbulent flow fluidizing speed and flow mode of particles in fluidized bed; analyzing confirmed items by computer for defining fault coefficient of particle agglomeration and setting threshold of fault coefficient; judging that caking is occurred in fluidized bed when fault coefficient is greater than set threshold.

Description

technical field [0001] The invention relates to the detection of fluidized bed reactors, in particular to the acoustic wave detection of fluidized bed reactors. Background technique [0002] The material level height, initial fluidization velocity, initial turbulent velocity and particle flow mode of gas-solid fluidized bed are important parameters of fluidized bed. For example, the material level height of gas-solid fluidized bed is a basic parameter of fluidized bed. In the polyethylene fluidized reactor, the bed height directly affects the quality and output of the fluidized reaction product. Timely and accurate detection of the material level height can maintain the stable and optimized fluidization quality of the fluidized bed and ensure that the fluidized bed operates at the optimum level. Operate at the optimum fluidization height to obtain high output. The initial fluidization velocity and initial turbulent velocity of the gas-solid fluidized bed reactor are the ba...

AI Technical Summary

Problems solved by technology

[0005] 1) For the monitoring of the material level of the fluidized bed reactor, the pressure monitoring is easy to be blocked during the monitoring process, and it is difficult to maintain; the capacitance monitoring is difficult to install and easy to be damaged; the automation degree of the weight monitoring is low; the temperature monitoring error is large; and There is time insensitivity, that is, when the signal changes significantly, the fluidization quality of the bed cannot be improved by changing the operating conditions; ultrasonic monitoring is expensive, has many interferences, and requires power; gamma rays are harmful to Harmful to the human body

[0006] 2) The pressure, capacitance, weight and temperature monitoring, differential pressure method and pressure pulsation method are all plug-in types. When installing, holes must be drilled on the wall of the fluidized bed, which is not only inconvenient, but may also affect the fluidized bed. The flow field, which has a certain influence on the flow and reaction inside the system

[0007] 3) The environmental requirements are relatively high. For relatively harsh factory environments, such as high temperature, high pressure, dust and other environments, signal distortion may be caused, and the dynamic information inside the fluidized bed cannot be truly reflected.

[0008] 4) What is more important is that the current various signal analysis methods have not yet been able to obtain the material level height, fluidization state and flow pattern through signal decomposition

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