Wood pellet combined heat and power plant with Stirling engine in condensing technology

摘要

In a wood pellet combined heat and power plant, comprising a pellet feed, a combustion chamber, a ash removal device and a Stirling engine, an exhaust gas recuperator (11) preheats combustion air (10) and gasifies wood pellets with part of this hot air (13) to achieve optimal efficiency , this part (13) of the hot combustion air (10) is guided above a grate (4) into a gasification combustion chamber (3a) and the resulting fuel gas (18) together with ash from a side channel compressor (7) down through the grate ( 4) is sucked, the fuel gas (18) under the grate (4) is mixed with a flow pulse of the rest (14) of the hot combustion air (10) that on the one hand a low lambda value close to the CO limit is maintained and depending on the temperature of the combustion chamber (3b), the combustion at a central nozzle (19) is stabilized or with increasing temperature of the combustion chamber (3b) more and more de r state of flameless combustion is set, whereby a potential vortex (20) arises in the combustion chamber (3b), which intensively mixes exhaust gas (6), combustion gas (18) and hot combustion air (14) so that combustion gas (18) and ash particles burn completely .