Measurement of circulation rates of coal particles in standpipe of a circulating fluidized bed system (CFBS) using radiotracer technique

Radiotracer technique was applied to measure the circulation rates of fine coal particles in standpipe of a pilot-scale bubbling circulating fluidized bed system (CFBS). ¹⁹⁸Au adsorbed on coal particles was used as a radiotracer. The radiotracer was injected into the standpipe and monitored at four different downstream locations. The circulation times and circulation rates were determined from the measured tracer concentration curves at different operating conditions. The measured parameters were intended to be used for optimizing the performance of existing CFBSs operating in industry and design of a new CFBS to be used as coal gasifier.