| The calcination behavior of pulverized limestone and dolostone sorbents was investigated under high temperature, short residence time conditions. Experiments were conducted in a laser heating apparatus and an entrained flow reactor which simulate a furnace injection process. Three aspects of the process were investigated: fragmentation of the sorbent particles, calcination kinetics, and sorbent physical property changes during calcination.;The study led to the following conclusions: (1) The fragmentation behavior was influenced by the sorbent type, particle size and particle temperature. Among these factors, the sorbent type was the most influential. (2) Heat transfer, mass transfer and chemical kinetics were all important aspects of the calcination process. During calcination, the sorbent particle temperature was considerably lower than the gas temperature, and temperature and CO;The calcination model developed in this study was applied to two practical systems, a transport coal-gasifier and a coal-fired pulse combustion system. The optimum calcination conditions were predicted. |
