System and method for measuring ash content and calorified value of coal

A system for measuring an ash content and a calorific value of a coal, comprising:

• at least two dual-energy gamma ray transmission measuring devices and a computing device, wherein
• at least one first dual-energy gamma ray transmission measuring device is disposed before an inlet of a coal combustion apparatus for measuring a first attenuation coefficient of a gamma ray from the at least one first dual-energy gamma ray transmission measuring device with regard to the coal before combusted;
• at least one second dual-energy gamma ray transmission measuring device is disposed after an outlet of the coal combustion apparatus for measuring a second attenuation coefficient of a gamma ray from the at least one second dual-energy gamma ray transmission measuring device with regard to a coal ash formed by combusting the coal;
• and
• the at least two dual-energy gamma ray transmission measuring devices are connected with the computing device respectively to transmit the first attenuation coefficient and the second attenuation coefficient to the computing device, and the computing device is configured to compute the ash content and the calorific value of the coal based on the first attenuation coefficient and the second attenuation coefficient.