OPERATING METHOD OF FLUIDIZED-BED INCINERATOR AND THE INCINERATOR

摘要

A fluidized-bed incinerator capable of absorbing a local and temporal temperature abnormality occurred due to variations in a load on the furnace or properties of waste by increasing the thermal capacity of the free boards of the fluidized-bed incinerator in order to burn waste such as sewage sludge and municipal refuse with high moisture content, characterized in that a flowing medium is bubbly-fluidized while a primary air for fluidization is blown from the underside of a fluidized-bed, a secondary air is led into a splash area in which particles are blown up by the rupture of bubbles on a fluidized sand bed surface in the bubbly fluidized area, the fluidized medium discharged into the splash area by the secondary air is transported to the outside of the incinerator through the free boards over the fluidized medium, the particles are circulated in the bubbly fluidized area through an external circulating part and, in addition, the ratio of the primary air to the secondary air is adjusted so as to regulate the heat capacity of the free boards and control a sand layer temperature to a constant.