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Início - ICHMT DL Ano atual Arquivos Comitê executivo Centro Internacional para Transferência de Calor e Massa

THE NEW STRAW PELLETS COMBUSTION BOILER FOR HEATING BULDINGS (SITUATION IN GREECE AND RUSSIA)

DOI: 10.1615/ICHMT.2012.SEBUA-12.280
pages 357-361

Rafail Isemin
Tambov State Technical University, Tambov, Russia

Sergey Kuzmin
Tambov State Technical University, Tambov, Russia

Valentin Konyakhin
Tambov State Technical University, Tambov, Russia

Alexander Mikhalev
Tambov State Technical University, Tambov, Russia

Dmitriy Viryasov
Tambov State Technical University, Tambov, Russia

Oleg Milovanov
Tambov State Technical University, Tambov, Russia

Nikos Nikolopoulos
Centre Of Research Technology Hellas / Institute of Solid Fuels and Technology Applications

Emmanouil Karampinis
Center for Research and Technology Hellas/Institute for Solid Fuels Technology & Application, Athens, Greece

Nikolaos Margaritis
Center for Research and Technology Hellas/Institute for Solid Fuels Technology & Application, Athens, Greece

Panagiotis Grammelis
Center for Research and Technology Hellas/Institute for Solid Fuels Technology & Application, Athens, Greece

Resumo

The use of straw and similar pellets (replacing fossil fuels) leads to the reduction of greenhouse gas (GHG) emissions and therefore contributes to the objective of the EU Directive for a 20% reduction of GHG emissions. Greece and Russia have significant available quantities of straw, which can be used in the production of straw pellets; these pellets can then be used as a fuel for heating / electricity either at a domestic level or as a process fuel and have significant advantages in regards to logistics compared to other handled forms, such as bales. However, the use of straw pellets in combustion applications has so far been limited by it ash properties, namely the low melting temperatures due to the presence of alkalis. In bed combustion in particular low ash melting temperatures promote the formation of slag agglomerates, which lead to increased pressure drops and, eventually, to the defluidization of the bed and boiler shutdowns. The results of the research on combustion of straw and similar pellets in a turbulent fluidized bed boiler are introduced. The proposed technology allows preventing slag and ash agglomeration in a bed.

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