CFB (Circulating Fluidized Bed) is widely used for coal-fired boilers. For combusting sewage sludge in CFB, a suitable fluidization mode for damp material is required. Experiments for combusting sewage sludge were carried out using a pilot-scale CFB incinerator. As a result, a desirable combustion method was established by optimizing the fluidization mode and controlling the profiles of the temperature and pressure. The results indicated that CFB is applicable to sewage sludge incineration.

Circulating fluidized bed (CFB), Bubbling fluidized bed, Sewage sludge, De-watered cake, Two-stage combustion, Fluidization mode, Environmental impact