Patent ID: 8689708

Claim:
A device for combustion of a solid phase fuel, comprising: a burner device ( 1 ) comprising a burner pipe ( 16 ) with an inlet opening ( 11 a ) and a burner orifice ( 17 ) adjacent a combustion space ( 18 ); and a non-pneumatic feeding means ( 11 ) arranged to feed a solid phase fuel to the inlet opening ( 11 a ), wherein the burner device further comprises i) a first supply conduit ( 13 ) with a first oxidant inlet ( 13 a ) arranged adjacently surrounding the inlet opening ( 11 a ) such that a stream of the oxidant fed from the first supply conduit ( 13 ) exits the first oxidant inlet ( 13 a ) surrounding the solid phase fuel being fed to the inlet opening ( 11 a ) so that the stream of oxidant surrounding the solid phase fuel is fed through the burner pipe ( 16 ) and out through the burner orifice ( 17 ) into the combustion space ( 18 ), ii) a supply conduit ( 101 ) with a water vapour inlet in the form of a second opening ( 101 a ) arranged adjacently surrounding the first oxidant inlet ( 13 a ) such that a stream of water vapour fed from the supply conduit ( 101 ) exits the second opening ( 101 a ) surrounding the stream of the oxidant exiting the first oxidant inlet ( 13 a ), and a supply system ( 12 ; 19 ), arranged to supply the oxidant via the first supply conduit ( 13 ) and through the first oxidant inlet ( 13 a ), so that the stream of water vapour exits the second opening ( 101 a ) surrounding the stream of the oxidant exiting the first oxidant inlet ( 13 a ), and with the oxidant to creating an ejector action to cause the fuel to be conveyed through the burner pipe and out through the burner orifice such that the stream of the oxidant exits the first oxidant inlet ( 13 a ) surrounding the solid phase fuel, with the water vapour, the oxidant, and the solid phase fuel meeting in the burner pipe in essentially one and the same location and with the water vapour meeting and being added to the oxidant before the oxidant reacts with the fuel.