SLUDGE INCINERATION IN SINGLE-STAGE COMBUSTOR WITH GAS SCRUBBING FOLLOWED BY AFTERBURNING AND HEAT RECOVERY

摘要

A method for sludge disposal in a single-compartment furnace (10) in which fouling of the apparatus by low melting eutectics and/or the release to the atmosphere of heavy metal fumes is avoided by limiting the temperature in the combustion bed (14) and in the overlying freeboard (16) to be below the eutectic melting or heavy metal fuming point, then immediately cooling and scrubbing (19) the gases and only thereafter subjecting the resulting scrubbed and cooled gases to high temperature afterburning (22) carried out with appropriate heat exchange functions. Apparatus is also disclosed for carrying out the method in a fluidized bed reactor.