The Revolving-Type Fluidized-Bed Incinerator: Its Basic Performance in Msw Combustion

Abstract

For the purpose of investigating basic combustion characteristics of fluidized-bed incinerators, two types of test incinerator were built and subjected to refuse incineration tests burning non-shredded refuse. For stable operation of a fluidized-bed incinerator, it is very important to keep an adequate fluidized bed temperature, and this can be accomplished for various types of refuse by adequately controlling and selecting the combustion characteristics. Through temperature measurement and gas analysis in the incinerator, the factors that could affect the fluidized bed temperature were identified. Also, by comparison of conventional-type fluidized-bed incinerators and revolving-type fluidized-bed incinerators, it became clear that the latter type was able to keep its bed temperature more stable. This is quite desirable for a heat recovery type incinerator.

Release of Sulfur and Chlorine during Cofiring RDF and Coal in an Internally Circulating Fluidized Bed

“…Next, the primary air separately enters the bed from air boxes with high or low air velocity. Unevenly distributed fluidized air induces a large-size internally circulating flow of solid particle in the dense bed, which may improve the properties of lateral diffusion. , Particles under the high air velocity move upward sharply and form the fluidization zone, whereas particles under the low air velocity move downward slowly and form the moving bed. The cross section of the dense phase zone is 500 × 240 mm, and the height is 1000 mm.…”

Refuse-Derived Fuel and Integrated Calcium Hydroxide Sorbent for Coal Combustion Desulfurization

“…9−11 Cl 2 and HCl from combustion of RDF lead to the formation of polychlorinated dibenzodioxins and dibenzofurans (PCDDs/PCDFs), which are toxic to the environment. 12,13 The process of reducing flue gas emissions by conventional methods requires the construction of scrubbing facilities downstream of power-generation facilities, which increases capital and operational costs.…”

“…Moreover, the low sulfur content in RDF leads to lower sulfur dioxide (SO 2 ) emissions. However, generation of other pollutants such as hydrogen chloride (HCl) needs to be addressed upon combustion of RDF because of the existence of poly­(vinyl chloride). − Cl 2 and HCl from combustion of RDF lead to the formation of polychlorinated dibenzodioxins and dibenzofurans (PCDDs/PCDFs), which are toxic to the environment. , The process of reducing flue gas emissions by conventional methods requires the construction of scrubbing facilities downstream of power-generation facilities, which increases capital and operational costs.…”