The Spittelau Waste Incineration Plant
Xu Yedan   Apr 30.2016

Introduction

The Spittelau Waste Incineration Plant

Year:1998

Region:Europe & Former Soviet Union States

Country:Austria

Summary:The plant is part of the Viennese waste management concept. The annual amount of waste which is thermal treated is about 265,000 t. Besides heat for the district heating system, it also produces electricity for its own purposes.

Reason to Be Selected

Another indicator for environmental compatibility of Spittelau waste incineration plant is the fact that the architectural design was carried out by the internationally renowned artist Friedensreich Hundertwasser who is a convinced environmentalist and who only agreed to undertake this project in an honorary capacity after long discussions on its environmental aspects.

Highlights:

In 1995 there had been connected to the district heating system of Vienna over 150,000 flats and over 3,000 public buildings.The Spittelau inceneration plant has state-of-the-art installations for environmental technology :

- electrostatic precipitators plus wet scrubbers for elimination of heavy metals, hydrochloric acid and sulphur dioxides.

- a catalytic flue gas scrubbing system reducing NOx, Dioxins and furan at a high degree of efficiency.

Details

Narrative:The waste lines of the Spittelau power plant are able to feed 60 MW into the network. The MWI has been in operation for over 25 years; its location as well as that of the Flotzersteig MWI was predetermined by big blocks of hospitals, which are to be supplied with district heat. As a precondition, the heat from waste should play major central role.To ensure a full-load operation of three days, a storage pit with a capacity of 7.000 m3 for accommodating the waste has been provided for. Two gantry cranes (with a span of about 20m,double-chain grab having a capacity of 4m3, lifting height about 25m) are provided for charging the furnaces and for the piling work in the storage pit.
When entering, the waste hauling vehicles are weighed on two bridge balances constructed for that purpose. 250 vehicles are frequenting the site per day. The trucks are discharged via eight dumping points.The original design, included an oil flue arranged in parallel with the waste combustion chamber to provide for adequate compensation in the event of any breakdown in the waste handling system. But in consideration of the network system of the heating corporation, the said furnace has not proved necessary, so that the oil burners were dismounted.
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In the reconstruction phase after 1987, according to the trend of times, two gas burners each were installed in the waste combustion chambers having an individual capacity of 9MW for the start-up and shut-down of the waste furnaces.

Based on that a combustion chamber temperature could be ensured of at least 900 C during the unstable start-up and shut-down phase. Thus, a better burnout of the flue gases could be safeguarded.

The pH-value is stabilized by adding lime slurry. Hydrochloric acid and hydrofluoric acid as well as dust together with heavy metals are separated in double-hollow conical water shields, where each of these filters covers the whole gas cross-section.

In order to prevent the loss of washing water and thus of Ca-ions from m scrubber 1 to scrubber 2, mist-eliminators are installed between the two washing towers.

It is worthwhile mentioning that the MWI Spittelau has been the first in Europe equipped with a SCR-plant behind a waste incineration installation with the longest operation period till now. Further, it is noteworthy that the dioxin emissions in the range of 0,02 to 0,06 ng TE/Nm3 are far below the limit value of 0,1 ng TE/Nm3 required by law.

On the part of the industrial and trade authorities the continuous measurement and registration of-following emission values were prescribed for the MWI Spittelau, where the MA22(Municipal Authority 22) has direct access to all operational and emission data of the plant (direct data link).

Further emission measurements at set intervals are carried out by the authorities throughout the year. Based on the considerable differences between the permitted and measured values, the potential reserves of the plant are evident.


 

 

 

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