Fluidised Bed: Difference between revisions

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===Rotating Fluidised Bed===

The rotating [[Fluidised Bed]] [[Incineration|incinerator]] is a development of the stationary/bubbling bed for [[Waste|waste]] [[Incineration|incineration]]. The [[Fluidised Bed]] is rotated, which results in a longer residence time in the [[Incineration|incineration]] chamber, combined with the uneven distribution of primary air over the distributor to create an imposed mixing pattern, allows for the treatment of a wide range of [[Waste|waste]] types and sizes. These include sludge, [[MSW]] and industrial [[Waste|waste]] after minimal pre-treatment<ref name="ref1" />. Inclined nozzle plates, wide bed ash extraction chutes and upsized feeding and extraction screws are specific features to ensure reliable handling of solid [[Waste|waste]]. Temperature control within the refractory-lined combustion chamber (bed and freeboard) is by [[Flue Gas|flue gas]] recirculation. This allows the [[Incineration|incineration]] of fuels with a wide range of [[Calorific ~~Values~~|calorific values]]<ref name="ref2" />.

The rotating [[Fluidised Bed]] [[Incineration|incinerator]] is a development of the stationary/bubbling bed for [[Waste|waste]] [[Incineration|incineration]]. The [[Fluidised Bed]] is rotated, which results in a longer residence time in the [[Incineration|incineration]] chamber, combined with the uneven distribution of primary air over the distributor to create an imposed mixing pattern, allows for the treatment of a wide range of [[Waste|waste]] types and sizes. These include sludge, [[MSW]] and industrial [[Waste|waste]] after minimal pre-treatment<ref name="ref1" />. Inclined nozzle plates, wide bed ash extraction chutes and upsized feeding and extraction screws are specific features to ensure reliable handling of solid [[Waste|waste]]. Temperature control within the refractory-lined combustion chamber (bed and freeboard) is by [[Flue Gas|flue gas]] recirculation. This allows the [[Incineration|incineration]] of fuels with a wide range of [[Calorific Value|calorific values]]<ref name="ref2" />.

===Circulating Fluidised Bed===

The circulating [[Fluidised Bed]] [[Incineration|incinerator]] recirculates the bed material/[[Feedstock|feedstock]] using a hot cyclone. It works with fine bed material and at high gas speeds that remove most of the solid material particles from the [[Fluidised Bed]] chamber with the [[Flue Gas|flue gas]]. The particles are then separated in a downstream cyclone and returned to the bottom of the [[Incineration|incineration]] chamber. Particles below the cut-size of the cyclone (ash) are removed from the reactor.

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 ===Rotating Fluidised Bed===
 [[File:Schematic diagram of a rotating fluidised bed furnace.png|250px|right|Schematic diagram of a rotating fluidised bed reactor. All rights reserved.]]
-The rotating [[Fluidised Bed]] [[Incineration|incinerator]] is a development of the stationary/bubbling bed for [[Waste|waste]] [[Incineration|incineration]]. The [[Fluidised Bed]] is rotated, which results in a longer residence time in the [[Incineration|incineration]] chamber, combined with the uneven distribution of primary air over the distributor to create an imposed mixing pattern, allows for the treatment of a wide range of [[Waste|waste]] types and sizes. These include sludge, [[MSW]] and industrial [[Waste|waste]] after minimal pre-treatment<ref name="ref1" />. Inclined nozzle plates, wide bed ash extraction chutes and upsized feeding and extraction screws are specific features to ensure reliable handling of solid [[Waste|waste]]. Temperature control within the refractory-lined combustion chamber (bed and freeboard) is by [[Flue Gas|flue gas]] recirculation. This allows the [[Incineration|incineration]] of fuels with a wide range of [[Calorific Values|calorific values]]<ref name="ref2" />.
+The rotating [[Fluidised Bed]] [[Incineration|incinerator]] is a development of the stationary/bubbling bed for [[Waste|waste]] [[Incineration|incineration]]. The [[Fluidised Bed]] is rotated, which results in a longer residence time in the [[Incineration|incineration]] chamber, combined with the uneven distribution of primary air over the distributor to create an imposed mixing pattern, allows for the treatment of a wide range of [[Waste|waste]] types and sizes. These include sludge, [[MSW]] and industrial [[Waste|waste]] after minimal pre-treatment<ref name="ref1" />. Inclined nozzle plates, wide bed ash extraction chutes and upsized feeding and extraction screws are specific features to ensure reliable handling of solid [[Waste|waste]]. Temperature control within the refractory-lined combustion chamber (bed and freeboard) is by [[Flue Gas|flue gas]] recirculation. This allows the [[Incineration|incineration]] of fuels with a wide range of [[Calorific Value|calorific values]]<ref name="ref2" />.
 <br clear=all />
 ===Circulating Fluidised Bed===
-[[File:Main components of a circulating fluidised bed.png|300px|right|Main components of a circulating fluidised bed. All rights reserved.]]
+[[File:Main components of a circulating fluidised bed.png|400px|right|Main components of a circulating fluidised bed. All rights reserved.]]
 The circulating [[Fluidised Bed]] [[Incineration|incinerator]] recirculates the bed material/[[Feedstock|feedstock]] using a hot cyclone. It works with fine bed material and at high gas speeds that remove most of the solid material particles from the [[Fluidised Bed]] chamber with the [[Flue Gas|flue gas]]. The particles are then separated in a downstream cyclone and returned to the bottom of the [[Incineration|incineration]] chamber. Particles below the cut-size of the cyclone (ash) are removed from the reactor.