Waste incineration plants

E.ON Energy from wasteEEW Hannover GmbH

Waste incineration plants in Germanyand in the Netherlands and Luxenburg

Facts about the waste incineration plants

• 230.000 tons per year

• Only household waste and household similar industrial waste

• No dangerous waste

• You get energy for 40.000 households

The principle

1 delivery2 bunker3 (pusher) grade4 slag remover5 cinder bunker6 ammonia water

7 boiler 8 turbine 9 generator10 condenser11 transformer12 spray absorber

13 absorber14 fabric filter15 induced draft fan16 emission measurement17 chimney

Delivery and bunker

• The waste is offloaded from trucks

• The waste is in the bunker

• A cran transports the waste into the boiler

Standpoint

Boiler and grade

• In the boiler the waste is spreaded by grades

• The fire temperature must be everytime over 870°C

Slag remover and cinder bunker

• The residue of the burned waste (slag) is transferred into the slag remover

• Now the slag is cooled down• The cold slag is brought into the cinder bunker• The slag will be transported to another

company• Iron, non ferric metals and not burned material

is taken out• The neutral slag is used for street building

Standpoint

But the smoke would damage the

nature, wouldn‘t it ?!?

No, because there is a cleaning principle!

First step:

Neutralisation of nitrogen oxides by spraying

25% ammonia water.

NH OH + NOx

are getting to

H O + N

4

ammonia water nitrogen oxides

2 2

water atmospheric nitrogen

Second step (spray absorber):

By atomisation of quick lime follows various reactions:

Ca(OH)2 Ca(OH)2 Ca(OH)2

+ + +

SO2 2 HCl 2 HF

H2O + CaSO3 2 H2O + CaCl2 2 H2O + CaF2

quick lime

sulphur oxid hydrochloric acid hydrofluoric acid

water calcium sulfite calcium chloride calcium fluoridwater water

Third step (absorber):Addition to spray absorber:

Gaseous heavy metals and dioxines were bound on carbon.

For reaching that, lime and activated carbon is sprayed against the cours of the smoke:

heavy metal doxines

activated carbon

attaches to attaches to

Forth step (fabric filter):

The solid components in the smoke get drained out by the filter membrane

Regular the solid components get cleaned from the filters by compressed air

The shaken off components are getting into a residue silo and after some time they get into an underground

depot

The clean gas leaves the Waste incineration plants threw the chimney

The induced draft fan supports the escape of the clean gas

Emission measurement

The leaving

Water circulation and steam circuit

How to get energy by burning waste…

… see where it is

•Inside the boiler are pipes in wich water is flowing

•The water is vaporized because of the heat in the boiler

•The steam rises because of the big pressure

•The steam powers the rator of the turbine•The generator produces electricity from the rator energy

•The transformer plant leads the electricity into

•The condenser cools the water down to 60°C

•The circulation begins again

the electricity grid

The principle

The endMade by Jolanda & Joana