Process and furnace for incinerating organic materials from the treatment of industrial or agricultural waste or wastewater, such as sludge.

摘要

The invention relates to a process for the incineration of organic matter resulting from the treatment of wastewater, industrial or agricultural waste, such as sludge and in particular sludge from purification plants, in a fluidized bed incineration furnace, said furnace comprising an enclosure in the lower part of which there is a bed of particles, preferably sand, constituting a Zf fluidization zone, Zf fluidization zone into which the organic materials are introduced as fuel while air is injected as an oxidizer into the sand bed from a wind box through a fluidization dome surmounting said box, the air passing through passages made in the fluidization dome, the furnace being configured to treat a nominal value Vn volume of organic matter to be treated Vmo. The invention consists in that the method comprises a step of adjusting the volume of the fluidization zone Zf as a function of the volume of organic materials to be treated Vmo in which, when the volume of organic materials to be treated Vmo is less than the value nominal Vn, the volume of the fluidization zone is reduced from an initial volume Vfi to a reduced volume Vfr, and the incoming air flow rate is reduced by closing off the air passages so as to leave active only the passages opening into the thus reduced fluidization zone Zfr. Figure to be published with the abstract: Fig. 1