Integrated Development Concerning a Resource-Efficient Operation of MBT-Processes with RTO-Technology

Due to the installation of regenerative thermal oxidizers (RTO) for exhaust air purification in the field of mechanical-biological waste treatment plants three general issues emerged:
• corrosion, preferential in the crude gas feeding systems and in the discharge systems of clean gas,
• deposits at the ceramic heat storage units,
• unanticipated high consumption of additional fuel.
The paper refers to the objectives of a recently started research project dealing with these issues in an integrated approach, which particularly includes the interaction between the MBT-process itself and the exhaust air purification system.

In order to keep the emission limits required by the 30. BImSchV (Federal Imission Control Act) - first of all the organic loads - combustion plants (so-called RTO plants) for waste gas from the mechanical biological waste treatment steps have been implemented. These are problematic in operation for three reasons: 
• Problems with corrosion arise. 
• The ceramic heat storage units are plugging from deposits. 
• Consumption of additional fuel is too high.
In order to confront these challenges systematically a research project has been launched what is the planning basis for an optimization of the processes including RTO.
• On the one hand the waste treatment processes method itself should be improved so that the potential of corrosion and deposits and the fuel demand for the RTO will be significantly reduced
• On the other hand a new RTO technology shall be developed and tested which is less sensitive for corrosion (resource efficiency) and can cope with deposits in a more improved manner.
The task involved with the research project and the hereby selected further actions shall be demonstrated in the frame of this paper. The project is carried out by the Engineering office for waste management and energy technology (iba) together with Clausthaler Umwelttechnik Institute (CUTEX) and started in the last year. It is supported by the working group of the Industrial Research Association of industrial research associations in the frame of the ZIM programme.



Copyright: © Arbeitsgemeinschaft Stoffspezifische Abfallbehandlung ASA e.V.
Quelle: 9. Recyclingtage 2012 (September 2012)
Seiten: 15
Preis: € 14,50
Autor: Univ.-Prof. Dr.-Ing. Otto Carlowitz
Dipl.-Ing Olaf Neese
Ketel Ketelsen
 
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