TUBULAR FURNACE Russian patent published in 2016 - IPC F27B5/00 

FIELD: heating.

SUBSTANCE: invention relates to tubular vertical furnace with coils, flue pipe with recuperative heat exchanger. Tubular furnace consists of furnace housing vertical lined with protective shell, chimney with recuperative heat exchanger, inside furnace housing is mounted several coiled or rectangular inner and outer coils of pipes located coaxially and forming between each other and annular beam reflective partition installed between coils channels for passage of flue gases formed during combustion of fuel from burner fixed in furnace hearth, characterised by that flue gas duct with recuperative heat exchanger, recuperator tube furnace is installed in parallel to furnace housing on foundation separate from furnace at distance from furnace union outlet to recuperator union inlet, equal to length of case controlled gate and the length of suction inlet union and is connected to lower part of the with diameter equal to that of casing installed inside pipe recuperator adjustable shutter and monitoring sensors measuring instruments, and outlet branch pipe of furnace is connected to space of furnace formed between external coil with minimum gaps between pipes and heat-resistant protective shell, lining of furnace housing, and inner coil outside is equipped with beam reflective shell with bandages stiffness at the ends secured via posts and brackets to bottom and cover of furnace, and in upper part of internal coil an adjustable flame deflector opposite exhaust valve on detachable cover of furnace, and recuperator in the lower part of tube space is equipped with inlet nozzle of smoke exhauster in lower part of its distribution chamber there are inlet and outlet unions with connecting pipe, connected at bottom with external convective coil, at top with internal radiant coil and at bottom with pipe and outlet union passing through hole in bottom or furnace housing to consumers of end product.

EFFECT: higher efficiency and reliability of furnace operation.

1 cl, 1 dwg