JPS5731717A - Incinerator for sewage sludge - Google Patents

Abstract

PURPOSE: To enable a combustion of sludge transported through a pipe by a method wherein a sludge being reduced in its viscosity by a heating means of a hopper is transported through the pipe to an atomizer provided at the top of a combustion furnace by a pump and jetted into the combustion furnace to be burned with heated and pressurized air.

CONSTITUTION: The sludge being reduced in its viscosity by the heating means 2 provided in the hopper 1 is pipe-transported to the atomizer 6 provided at the top of the combustion furnace 5 having a fluidized sand bed by the pump 3, atomized and sprayed to be burned with the heated and pressurized air supplied from blow the sand layer 8. For example, the sewage sludge of moisture content at 80% and a viscosity at 5,000CP is housed in the hopper 1 and heated until the viscosity becomes as low as 100CP. Then, the sludge is pipe-transported to the atomizer 6 through a pipe 4 by the pump 3, atomized thereby into fine particles of a diameter smaller than 500μ and sprayed. The sludge is burned countercurrently with the heated and pressurized air about 400C which is made to ascend by a combustion air pipe 10 while fluidizing the sand layer 8.

COPYRIGHT: (C)1982,JPO&Japio