| abstract |
Reactions are carried out between gases and solids in fluidized beds established above perforated supports 228, 248 and where, for example, combustion and desulfurization are carried out, the presence of an inert and non-combustible material such as sand and quartz pebble 230, 250 used to renew by attrition the active surface of a sorbent such as limestone combining with SO2, baffles 252 opposing the entrainment of solids out of the beds whose heights and the fluidization conditions are carefully adjusted with the aid of ascent devices 264 and descent 260, 266. |