(best examples and good practices) on household organic waste ...
(best examples and good practices) on household organic waste ... (best examples and good practices) on household organic waste ...
35 Pyrolysis: thermal degradation of organic material in the absence of oxygen Gasification: partial oxidation Incineration: full oxidative combustion. 3.2. Incineration The incineration (combustion) of carbon-based materials in an oxygen-rich environment (greater than stoichiometric), typically at temperatures higher than 850o, produces a waste gas composed primarily of carbon dioxide (CO2)
36 power
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power <str<strong>on</strong>g>and</str<strong>on</strong>g> 1,200 MWh district heating could be produced each day.<br />
(Moustakas.,2010)<br />
The method could be applied for the treatment of mixed solid <strong>waste</strong> as well as<br />
for the treatment of pre-selected <strong>waste</strong>. It can reduce the volume of the<br />
municipal solid <strong>waste</strong> by 90% <str<strong>on</strong>g>and</str<strong>on</strong>g> its weight by 75%. The incinerati<strong>on</strong><br />
technology is viable for the thermal treatment of high quantities of solid <strong>waste</strong><br />
(more than 100,000 t<strong>on</strong>nes per year) (Moustakas., 2010). A number of<br />
prec<strong>on</strong>diti<strong>on</strong>s have to be satisfied so that the complete combusti<strong>on</strong> of the<br />
treated solid <strong>waste</strong> takes place:<br />
adequate fuel material <str<strong>on</strong>g>and</str<strong>on</strong>g> oxidati<strong>on</strong> means at the<br />
combusti<strong>on</strong> heart<br />
achievable igniti<strong>on</strong> temperature<br />
suitable mixture proporti<strong>on</strong><br />
c<strong>on</strong>tinuous removal of the gases that are produced during<br />
combusti<strong>on</strong><br />
c<strong>on</strong>tinuous removal of the combusti<strong>on</strong> residues<br />
maintenance of suitable temperature within the furnace<br />
turbulent flow of gases<br />
adequate residence time of <strong>waste</strong> at the combusti<strong>on</strong> area<br />
(Gidarakos, 2006).<br />
3.2.1. Key features of a <strong>waste</strong> incinerator<br />
A <strong>waste</strong> incinerator is not an isolated furnace, but a complete industrial<br />
installati<strong>on</strong> c<strong>on</strong>taining most or all of the following features:<br />
‣ Waste storage <str<strong>on</strong>g>and</str<strong>on</strong>g> h<str<strong>on</strong>g>and</str<strong>on</strong>g>ling<br />
‣ Waste feeding<br />
‣ Combusti<strong>on</strong> in the furnace<br />
‣ Heat recovery followed by steam <str<strong>on</strong>g>and</str<strong>on</strong>g> electricity producti<strong>on</strong><br />
‣ Air polluti<strong>on</strong> c<strong>on</strong>trol (flue gas treatment)<br />
‣ Residue (ash <str<strong>on</strong>g>and</str<strong>on</strong>g> <strong>waste</strong>water) h<str<strong>on</strong>g>and</str<strong>on</strong>g>ling<br />
The combusti<strong>on</strong> is not a <strong>on</strong>e stage process. Before the <strong>waste</strong> ends up burning,<br />
drying which is <strong>on</strong>e of the most important parameter takes place, heating up