Turbulent bed incinerator for partially dewatered sludge - secondary combustion air injectors inclined adjustably towards afterburner

摘要

A turbulent bed furnace for incinerating partially de-watered sludge, has a bed formed by a mass of particles of refractory material, maintained in a state of agitation by compressed air fed in from below, which also partially satisfies the combustion requirements, whilst the sludge is injected from above; a combustion zone is provided above the turbulent layer, and larger in section than it; and having a horizontal roof in which a cylindrical afterburning chamber is arranged; has nozzles arranged close to the afterburning chamber inlet for the injection of secondary combustion air. The nozzles are adjustable in their oblique alignment towards the turbulent bed and their tangential direction towards the section of the afterburning chamber inlet. Improved recovery of the heat energy made available. Coarser particles of sludge lifted from the bed, are blown back by the flow from the inclined secondary air nozzles, and burned completely.