Method for measuring coal ash material position using nuclear radiation field theory

Abstract

The present invention discloses a method which applies a nuclear radiation field theory for measuring the flyash material level, firstly the boundary condition of the flyash bucket is assured; the interface of flyash in the ash bucket is leaded to approximate to the surface-shaped radiant body, and the relationship between the boundary of the surface-shaped radiant body and the boundary conditionof the ash bucket is established; according to the mathematical model of exposure rate of gamma filed at the upper part of the interface surface-shaped radiant body, the corresponding relationship between the gamma exposure rate and the height of the material level is established; the actually measured gamma exposure rate is taken into the corresponding relationship, then the ash bucket inner material level height corresponding to the gamma exposure rate is obtained. The method of the invention uses the theoretical knowledge of the nuclear radiating field, the flyash interface in the ash bucket is taken as the surface-shaped radiating body for considering, the relationship between the exposure rate of the gamma field at the upper part of the surface-shaped radiating body and the height ofmaterial level in the ash bucket is established, only with the boundary condition of the ash bucket and the measured gamma-field exposure rate the height of the material level in the ash bucket can be obtained. In the practical application the invention has the advantages of practicability, simple operation and accurate data.

Description

technical field [0001] The invention relates to the application of the nuclear radiation field theory in the measurement of the fly ash material level, and in particular relates to a method for measuring the fly ash material level in an inverted quadrangular ash hopper using the nuclear radiation field theory. Background technique [0002] At present, the methods for measuring the level of fly ash are generally divided into three categories: [0003] Contact material level measurement method: During measurement, the measuring device needs to be in contact with fly ash. Commonly used measuring devices include float level gauges, capacitive level gauges, radio frequency admittance level gauges, vibrating rod level gauges, etc. Since the measuring device directly contacts the fly ash, when the temperature of the fly ash is high, the electronic circuit part of the measuring device is often damaged. In industrial use, the influence of fly ash on the wear of the measuring device ...

AI Technical Summary

Problems solved by technology

The core of the disclosed method is to "calibrate the corresponding relationship between the measured radioactive level and the material level in the container, and obtain the actual material level in the container according to the corresponding relationship between the calibrated radioactive level and the material level in the container". In the measurement of the ash level of fly ash, since the storage bin of fly ash is generally steel or concrete closed structure, it is difficult to realize the calibration step. , Acoustic and other sensory organs are almost impossible to achieve, only through the instrument to achieve the corresponding relationship between the calibration level, and the calibration process of the instrument is too cumbersome, it is generally difficult to use

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