Abstract:
Curing oven for crosslinking a continuous mat (12) of inorganic or plant fibres, comprising a plurality of heating chambers (20) through which said mat of fibres (12) passes in succession, said oven being characterized in that at least one of said chambers further comprises, between the exterior insulating jacket (49) of the oven and the central compartment (40) of said chamber, an integrated hot gas recirculation and heating device comprising: - at least one radial turbine (50) mounted horizontally on the upper wall (45) or the lower wall (46) of the central compartment (40), its axis of rotation arranged vertically, said turbine drawing in hot gas along said axis through a gas outlet orifice (48) of the central compartment (40) after the gas has passed through the mat (12) and discharging it radially toward curing means (51, 52), - means (51, 52) for recirculating the hot gas leaving the radial turbine (50) as far as an inlet orifice (47) via which the gas enters the compartment (40), said recirculation means being arranged at least in part on at least one lateral wall (43, 44) of the compartment, - at least one means (53) of heating the gas circulating in said chamber.
Abstract:
The invention relates to a method and to a system for thermally treating elongate, flat metallic material, in particular aluminum rolled ingots (2), in a furnace, a ring hearth furnace (1) being used as the furnace, said ring hearth furnace having a rotary-driven ring hearth floor (7a) between a thermally insulated outer housing (3) and a thermally insulated inner housing (4), said ring hearth floor being sealed off from the housing (3, 4), and at least one closable charging and discharging opening (15; 15a, 15b). For convection-heating of the aluminum rolled ingots (2) introduced into the ring hearth furnace (1), air, which is sucked upwards by circulation fans (19), which are provided on the ceiling side and distributed over the circumference of the ceiling (6), out of the ring hearth interior (1a), which is enclosed by the outer and inner housing (3, 4), is first conducted along heating means (20a, 20b; 21), which are arranged on the ceiling side and project into the hearth interior (12) and then flows into pressure ducts (22), which extend on the inner walls of the outer and inner housing (3, 4) and from which the air, which is increasingly heated up during the heat-up phase, is blown at the aluminum rolled ingots (2) via slot nozzles (23) in order to heat the aluminum rolled ingots (2).
Abstract:
A continuous heating furnace (200) includes a conveyance body (210) stretched in an endless shape and configured to convey a burning target, a furnace main body (212) partially or entirely surrounding the conveyance body to form a burning space, and a roller (214) configured to support a portion of the conveyance body in the furnace main body. The continuous heating furnace (200) further includes one or more closed gas heaters having an introduction hole configured to introduce a fuel gas into a heater main body, a combustion chamber in which the fuel gas is combusted, a discharge section to which an exhaust gas is guided, a radiation surface heated by the exhaust gas flowing through the discharge section or combustion in the combustion chamber and configured to transfer radiant heat to a burning target, and an exhaust hole configured to exhaust the exhaust gas that heats the radiation surface to the outside of the heater main body, and disposed in the furnace main body, and an exhaust pipe (216) in communication with the exhaust hole of the closed gas heater and through which the exhaust gas is guided. In addition, the exhaust pipe enables heat exchange between the exhaust gas flowing through the exhaust pipe and the roller.
Abstract:
The invention relates to a device for conveying metal strips in a floating manner by means of a gas, comprising a plurality of heat treatment units (1, 1'), each of which has a lower and upper jet nozzle system (4A, 4B), a lower and upper flow channel system, at least one ventilator (5A, 5A', 5B, 5B'), and multiple jet tubes (6A, 6B). The invention also relates to a method for operating such a device. The aim of the invention is to develop the device or the method such that the energy efficiency, the heat transfer, and thus the throughput performance as well as the product quality are improved. This is achieved in that each flow channel system has at least one depression (11A, 11B) transverse to the strip direction in the direction of the jet nozzle system (4A, 4B) in order to receive at least one jet tube (6A, 6B).