The characteristics of coincineration of dewatered sludge, waste oil and waste solvent in commercial-scale fluidized bed incinerator

A commercial-scale Fluidized Bed Incinerator (FBI), which has a capacity of 60 tons per day to treat dewatered sludge and waste oil or solvent, was developed as one of the governmental R&D projects from 1990 to 1997. From the design, construction and operation of the plant, the characteristics of co-combustion and appropriate operating conditions with successful fly ash recirculation and with effluent controls have been investigated. Without adding any bed materials, sand, the co-incineration of sludge and spent-solvent can be achieved. The sludge combustion steps could be observed and confirmed, which consist of evaporation, agglomeration, devolatilization, combustion and attrition. The plant can also incinerate various types of sludge from wastewater treatment facilities with waste oil or solvent.