Multiple-point coal ash detection method

Abstract

The invention provides a multiple-point coal ash detection method which comprises the following steps of collecting a middle / low-energy gamma ray spectrum signal and a characteristic X ray; processing the collected signal; and calculating and displaying ash content of coal online. According to the multiple-point coal ash detection method, a middle / low-energy gamma source Am241 can serve as a low-energy gamma source for emitting a low-energy gamma ray and also serve as an excitation source of the characteristic X ray. An automatic ash discharging valve system can achieve multiple-point continuous measurement of the ash content by evenly and continuously measuring axis in a measurement period, so that the problem of poor representation of single point measurement on material unevenness measurement of the traditional double-energy gamma technology is avoided. The multiple-point coal ash detection method is simple, reliable, high in measurement accuracy and suitable for complex occasions where coal types are changeable.

Description

technical field [0001] The invention relates to a coal ash detection method, in particular to a multi-point coal ash detection method. Background technique [0002] At present, the use of gamma ray technology has been used as a routine technology in various measurement and analysis. It has many advantages that other analytical techniques do not have. For example, using the characteristic of strong penetration, gamma rays have been used for non-destructive testing of metals and ash in coal many years ago. In recent years, gamma-ray related nuclear measurement technology has been widely used, such as its application in cement, coal, ore and other fields. At present, the technology of using dual-energy gamma rays to detect the ash content in coal is very mature, but due to the traditional dual-energy gamma technology, only the ash content on the source detection axis is measured, which is a single-point measurement, and the representativeness is poor. If the material is unifor...

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Problems solved by technology

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a multi-point coal ash detection method, which uses the automatic uniform ash unloading valve system to continuously and uniformly unload the material within the measurement period, and realizes continuous multi-point measurement within the measurement period, solving the problem of It solves the representative problem of single-point measurement of traditional dual-energy ash analyzer, and effectively improves the representativeness and accuracy of measurement.

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