SWIRLING-TYPE FURNACE Russian patent published in 2004 - IPC

FIELD: industrial and power-generating boilers burning husk, comminuted vegetable and wood waste or solid fuel. SUBSTANCE: swirling-type furnace has at least one screened swirling-type combustion chamber and one after-burner chamber connected by gas overflow window that is framed with aerodynamic protrusion 100-200 mm in size directed towards swirling-type combustion chamber. Ratio of cross-section of swirling-type combustion chamber to its depth amounts to 2-6 and ratio of cross-section of swirling-type after-burner chamber to diameter of gas overflow window is 1.4-5.0. Fuel supply ejector in this case terminates in diffuser which outlet is located on front wall of swirling-type combustion chamber at distance of 100 mm as minimum from bottom, is inclined downwards and oriented on root of first group of blast nozzles installed along lower generating line of swirling-type combustion chamber. First blast nozzles are directed upwards at angle of 30-45 degrees and are oriented on root of second group of blast nozzles located on rear wall of swirling-type combustion chamber and directed along tangent line to aerodynamic protrusion of gas overflow window. Relation of cross-section areas of ejector and each group of blast nozzles is equal to 1.25-2.0 and relation of blast speeds in them is correspondingly equal to 0.8-0.5. Swirling-type furnace also has burner. Swirling-type furnace can have two swirling-type combustion chambers and one after-burner chamber positioned between them. Gas burner is placed in swirling-type combustion chamber or in after-burner chamber and is inclined towards bottom of swirling-type combustion chamber. EFFECT: simplified design of swirling-type furnace, enhanced fuel burning efficiency and ecological safety of furnace. 4 cl, 5 dwg