A measurement method of liquid level of a coke-cracking tower based on dual-energy γ-ray transmission is presented

Both liquid level and height of foam in a coke-cracking tower have been determined by using the measured real-time curves. It was shown that the productive efficiency was raised

the productive cycle was shortened from 23 h to 16 h

and the defoamer was saved by 12%. Meanwhile

by using rod-like radioactive sources and high performance γ-ray spectrometer

both precision and stability of the measurement were improved

e.g. the measurement error of liquid level was less than 4.3%.