Energy recovery 3: Modern grate combustorspanos/444/1.9.2.WtE.pdfFlue gas treatment line...

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Sustainable Waste Management AIT Athens, Greece - 18-22 June 2012 Energy recovery 3: Modern grate combustors prof. Stefano Consonni Department of Energy, Politecnico di Milano

Transcript of Energy recovery 3: Modern grate combustorspanos/444/1.9.2.WtE.pdfFlue gas treatment line...

Page 1: Energy recovery 3: Modern grate combustorspanos/444/1.9.2.WtE.pdfFlue gas treatment line Electro-Static Precipitator (ESP), captures (large) particulate matter (fly ash) Injection

Sustainable Waste Management AIT Athens, Greece - 18-22 June 2012

Energy recovery

3: Modern grate combustors

prof. Stefano Consonni Department of Energy, Politecnico di Milano

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A conventional modern

Waste-to-Energy plant

with grate combustion

Graphics from MARTIN Gmbh

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Receiving area

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Receiving area

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Bunker

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Bunker

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Crane

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Crane

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Crane

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Feed hopper

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Feed hopper

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Feed hopper

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Grate

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Grate

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Grate

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Grate

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Grate

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Boiler

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Boiler

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Boiler

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Boiler

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Flue gas

treatment line

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Flue gas

treatment line Electro-Static

Precipitator (ESP), captures (large)

particulate matter (fly ash)

Injection of sodium bicarbonate or calcium (lime),

removes acid gases. Injection of activated carbon, removes micro-pollutants (dioxins,

heavy metals).

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Flue gas

treatment line Reactor warrants adequate contact

time between reactants and acid

gases

Fabric filter (or scrubber) removes remaining fly ash and products of acid gas

treatment

De-NOX SCR system (catalytic reactor) with injection of ammonia

or urea reduces nitrogen oxides

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Stack

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Stack