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Leudelange 02 | 03 Energetic Waste is a valuable source of energy. The energy from waste has been recycled in the plants of the EEW-Energy-from-Waste Group (EEW) for more than 40 years now and used to generate environmentally friendly power, district heating and process steam. At the same time thermal waste recycling is a supporting pillar of a modern, sustainable waste-disposal economy. EEW guarantees this to its partners and customers. For this reason EEW develops, constructs and runs wasteincineration plants of a high technical and ecological standard and thereby makes an important contribution to the environment and to climate protection. Taking control of waste disposal The waste business in Luxemburg is controlled by the three waste syndicates, Sidec, Sigre and Sidor. While Sidec and Sigre have a mechanical biological treatment plant and a landfill area, 70 percent of all waste in the Grand Duchy is disposed of in environmentally friendly fashion in the thermal waste recycling plant belonging to Sidor. This provides certainty of disposal for household and commercial waste from the town of Luxemburg as well as a further 34 boroughs. In addition the three syndicates are planning to work more closely together from 2015 in order to recycle and dispose of further thousands of tons of waste in the best possible fashion. In Leudelange, to the south of the town of Luxemburg, Sidor also owns the highly modern waste recycling plant which was planned and built by EEW. EEW Leudelange has been operating this plant since 2010 and produces electrical power from 150,000 tons of waste. 04 | 05 Everything at a glance k 11 3 6 7 9 10 1 2 8 4 1 Waste Bunker 2 Incineration Grates 3Furnace 4 Slag Bunker 5 Steam Turbine/Generator 6 Turbo Reactor 7 Bag Filter 8 Induced Draft Fan 9 Catalytic Converters 10 Emission Measurements 11Chimney 5 Ergänzende Daten Put into operation 2010 Total investments 100 million euros Capacity 150,000 tons No. of incineration lines 1 Waste storage volume 13,000 cubic metres ≈ 7,500 tons Heat Range for the Waste 8-14 megajoules/kilogram Combustion Temperature > 850 °C Power production 135,000 megawatt hours ≈ 35,000 households 06 | 07 Residual waste turns into energy Several thousand tons of waste are brought to the plant every week where it is collected and put into interim storage in the waste bunker. Up to 7,500 tons of waste can be stored in the bunker. This corresponds to the loads of around 1,500 garbage vehicles This ensures that operation is continuous even at the weekend or on official holidays. An employee of the plant regularly stirs the waste with the help of a crane claw to create a homogeneous mix. This is necessary since the waste comes from a wide variety of sources and therefore has a varied energy content. Only a consistent mix of waste can be burned on the grate without problems. The line can incinerate waste with an average calorific value of 10,500 kilojoules per kilogram. The crane claw can move up to three tons of waste. To ensure that no smells can escape into the air a slight underpressure is maintained in the bunker. This is created by suctioning air from the bunker for purposes of combustion. The prepared waste is transferred from the bunker via the feeding hopper to the incineration grates for the lines. Once ignited the waste material automatically continues to burn. The fire has a temperature of more than 850 °C. With this heat energy around 77 tons of steam per hour are produced in the boiler. With a pressure of 40 bar and a temperature of 400 °C this steam drives a turbine connected to a generator. In this way the plant produces up to 135,000 megawatt hours of electrical power per year which is then fed into the public grid. The operation of the thermal waste recycling plant represents an alternative to an annual energy production based on the use of nearly 53 million litres of heating oil. 08 | 09 Environment protection right from the start No chance for pollutants Environmental protection is already applied at the furnaceburning stage. The creation of dioxin and furans in the combustion chamber is reduced by keeping the temperature at 850 °C. At the same time the levels of carbon monoxide and nitrogen oxide are reduced. Ammonia water is injected into the flue gas finely distributed in order to split the nitrogen oxides in the catalytic converter into environmentally neutral nitrogen and water. The cleansed flue gas then leaves the 82 metre high chimney. With a temperature of 200 °C the flue gases leave the furnace and then undergo several further stages of fluegas cleansing during which other pollutants are reduced to a minimum. What remains is slag, flue ash and filtration dust. The slag is recovered and is used for roads and civil engineering projects. The flue ashes and filtration dust, by contrast, are removed and used as backfilling material. The flue gases first reach the turbo reactor. There sodium bicarbonate is sprayed into the flue gas in order to bind chlorine and sulphur compounds. At the same time further dioxins and furans are bound by adding hearth furnace coke. Solids are formed which are deposited together with dust particles on the hoses of the downstream bag filter. There they form an absorbent layer. The Leudelange location produces no waste water. Dirty water is recovered and reused in the flue gas cleansing process. In addition rainwater is collected and used as service water in the plant. The deposits are removed at regular intervals by means of jets of compressed air. 10 | 11 Strict specifications Our Environmental Contribution Thermal waste recycling is currently the most environment-friendly form of waste disposal. 150,000 tons of waste per year disposed of cleanly By using waste as fuel, emissions of carbon dioxide are reduced in the EEW Leudelange plant alone by some 23,000 tons a year - as compared to power production in conventional brown coal-fired power plants. The emissions levels laid down in Luxemburg‘s Règlement grand-ducal dated December 19, 2002 are easily met in Leudelange. 135,000 megawatt hours of power production per year Power for 35,000 households 23,000 tons of CO2 save Emission Data for EEW plant 100 80 60 40 20 1 Operating Values for Leudelange In accordance with the Luxemburg‘s Règlement grand-ducal ra fu et di ox in s/ m vy ea Utilization value in percent Limit Values 1 ns s al m r liu al /th m ta iu to dm lh st sil ve ick du ca or qu id ga e co nic m ca po rb un on ds e or hy dr og en flu lo xid hy dr og en ch io rd hu lp su rid e e id ox on m on rb ca ni t ro ge n ox id es 0 163 Rue de la Gare Rue e de C ge s s an 179 Rue a deL voir 4 urg mbo uxe de L Rue 163 4 'E ed Ru 4 A4 h sc 169 Route e de B A4 163 We hope that this flyer has made you curious to find out more. You are welcome to visit our plant. Please contact us under: EEW Energy from Waste Leudelange S.à r.l. Route de Bettemburg 3346 Leudelange Luxemburg T +352 37 85 41-1 F +352 37 86 89 [email protected] www.eew-energyfromwaste.com Our corporate design has won an award. 04/2014 bourg ttem EEW