초록 ▼

The heat recuperator of a burner for an industrial furnace makes use of a substantially cylindrical body of ceramic produced by extrusion in which there are two interleaved sets of parallel channels, one set for the flow of combustion product gases out of the furnace and another set for the supply o

The heat recuperator of a burner for an industrial furnace makes use of a substantially cylindrical body of ceramic produced by extrusion in which there are two interleaved sets of parallel channels, one set for the flow of combustion product gases out of the furnace and another set for the supply of air to be preheated in the recuperator and delivered to a combustion chamber coaxial with the recuperator and possibly located at least in part in the end portion of the cavity surrounded by the cylindrical ceramic body. The combustion product gases and the air being preheated flow in countercurrent and the disposition of the sets of channels facilitates heat transfer. The combustion chamber is constituted entirely of ceramic parts. A jet nozzle is provided on the outlet side of the combustion chamber and a fuel lance passing through the middle of the recuperator body and into the combustion chamber may also serve to adjust the jet nozzle by means of a valve body around its tip. Some of the air supply from the recuperator may discharge just outside of the combustion chamber so that a two-stage combustion may be provided, beginning with incomplete combustion in the combustion chamber.

대표청구항 ▼

Industrial burner means for heating furnaces and other high heat treatment installation having recuperative air-preheating means and a combustion chamber means (42) constructed of ceramic material providing for an input thereto of fuel and air and a hot gas exit in the form of jet-producing nozzle m

Industrial burner means for heating furnaces and other high heat treatment installation having recuperative air-preheating means and a combustion chamber means (42) constructed of ceramic material providing for an input thereto of fuel and air and a hot gas exit in the form of jet-producing nozzle means (43), and wherein: said recuperative air-preheating means is constituted as a substantially cylindrical centrally hollow body (4, 4a, 4b) of ceramic material disposed coaxially with said combustion chamber means (42) and said nozzle means (43) thereof and of tubular construction containing a multiplicity of longitudinal channels for countercurrent flow of combustion-supporting air and combustion product gas through respective sets of channels (9, 10) interleaved for provision of wall parts capable of thermally coupling said respective sets of channels, said channels of said set for flow of combustion supporting air being connected a supply manifold of a source of said air flow located at an axial extremity of said substantially cylindrical body of tubular construction opposite to an axial extremity thereof connected to said combustion chamber means; said channels (9, 10) of both of said sets of channels in said hollow cylindrical body being distributed annularly next to one another interleaved sets about the longitudinal axis of said hollow cylindrical body; said hollow cylindrical body having an inner substantially cylindrical jacket wall (5) surrounding an inner substantially cylindrical space (6), and said combustion chamber means (42) being provided either directly at a said end of said hollow cylindrical body or in a position utilizing an end portion of said substantially cylindrical space for at least a portion of said combustion chamber means; at least a portion of said channels (10) of said set for flow of combustion supporting air being connected at their flow output ends to said combustion chamber means and all of said channels (10) of said air flow set having outflow orifices at an end of said hollow cylindrical body in the vicinity of said combustion chamber means (42), and said nozzle means (43) being constituted, at least in part by structure either passing through said hollow cylindrical body or connected to said hollow cylindrical body or both passing through said hollow cylindrical body and connected thereto.