Sludge incineration in single-stage combustor with gas scrubbing followed by afterburning and heat recovery

Abstract From the Canadian patent

of Disclosure, A method for sludge disposal in a singlecompartment furnace 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 and in the overlying freeboard to be below the eutectic melting or heavy metal fuming point, then immediately cooling and scrubbing the gases and only thereafter subjecting the resulting scrubbed and cooled gases to high temperature afterburning carried out with appropriate heat exchange functions. Apparatus is also disclosed for carrying out the method in a fluidized bed reactor.