SOOT REDUCTION DEVICE FOR GASIFICATION OF COMBUSTIBLES
In the context of the reduction of fossil fuels the usage of renewable combustibles becomes more and more important. For the combustion of biomass usually the combustible is first gasified and after that the gases are burned. In this process a large quantity of dusts is produced, especially when using pelletized biomass. In case the combustion process is combined with a cogeneration unit for the production of electricity as e.g. a stirling engine, the heat exchanger can be clogged up by the dust and soot particles. The result would be a reduction of efficiency of the cogeneration plant. Moreover, the dusts contains highly corrosive substances that can cause damages with steel components.1
One option to remain within the allowable limits for dust and soot particles is the application of filters which is possible but rather complex as it necessitates additional cleaning of the heat exchanger.
The innovation provides a solution for the reduction of dust and soot particles in a combustion process. The combustibles are burned in an updraft gasifier so that the gases pass through the biomass supply that acts as a filter for the particles. So, without any additional filter system the gas that is burned afterwards is almost soot free. Clogging up the heat exchanger or damaging steel components is avoided as there are no particles. Other aspects of the invention ensure the flow of pellet material when swelling due to water vapour. This can be achieved by the implementation of a vibration mechanism and a device for volume compensation.
Renewable energies for heating and electricity supply
STATUS OF DEVELOPMENT
 European Patent Application EP 3 088 493 A1