Engineering:RDF-Powerstation
The RDF-PowerStation is a peripheral thermal recovery plant, which is based on renewable energy (especially on Refuse derived fuel (RDF)).
Concept
The RDF-Powerstation is directly integrated in a building like a business centre and is used as a cogeneration or trigeneration plant. Due to that the incineration unit and all additional components, which are necessary for the operation of the plant and the utilization of the energy, are located in the consumers’ area. So the energy is produced and used at the same place. The technical realization of this concept is based on the configuration of the process diagram.
Before the crude materials (e.g. municipal or commercial waste) are introduced into the incineration unit, these resources are mechanically treated at an external station. The treatment intensity is significantly linked to the quality and composition of the primary material. So the treatment process can be very different – from an ordinary crushing and a rough sortation to a multistep milling process with various product streams and a finishing briquetting. The final product of this step – the Refuse derived fuel – is used in the “RDF- Powerstation”.
The combustion unit is equipped with a water-cooled reciprocating grate, a post- combustion chamber, where the selective non-catalytic reduction of the nitrogen oxides is included and a steam boiler with the heat exchangers. The main part of the heat energy, which is captured in the live steam, is used for the electricity production. Another portion is applied for a heating grid or an absorption refrigerator.
Following the steam boiler the flue gas enters the 4-stage dry scrubber. There the pollutants of the flue gas are extracted by different additives, which separated at the baghouse filters. Additionally a catalyzer is included to enable an extra stage for the removal of the nitrogen oxides (SCR- process). At the end of flue gas purification process an algae reactor is mounted, where algae is converting carbon dioxide to biomass.
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