摘要:
An oxy-fuel boost burner for a regenerative furnace having a pair of regenerator ports configured to alternately fire into and exhaust from the furnace, including at least one burner element corresponding to each of the regenerator ports by being positioned to fire into a complimentary region of the furnace, each burner element including a selective distribution nozzle configured to flow a first reactant and a proportional distribution nozzle configured to flow a second reactant, and a controller programmed to identify which regenerator port is currently firing and which is currently exhausting and to independently control the first reactant flow to each selective distribution nozzle such that the at least one burner element corresponding to the currently firing regenerator port has a greater than average first reactant flow and the at least one burner element corresponding to the currently exhausting regenerator port as a less than average first reactant flow.
摘要:
The invention concerns an industrial furnace comprising a thermally insulated enclosure and a plurality of burners distributed in a plurality of heating areas, the furnace further comprising recovery means (6) intended to recover heat energy from recovery fumes (F2) originating from a first combustion carried out by the burners. According to the invention, the recovery means (6) comprise a rotary regenerator (7) associated with each heating area (Z1, Z2, Z3), each of the rotary regenerators (7) being suitable for receiving a predefined flow of recovery fumes and a predefined flow of supply air, and for preheating this supply air in order to supply the burners (3) in the associated heating area with a predefined flow of preheated combustion air (9).
摘要:
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.
摘要:
The present invention relates to a gas recirculating furnace which aims to enable generation of a high-temperature strong recirculating current and comprises heat sources 3A and 3B for heating a recirculating gas outside the furnace and an out-of-furnace circulating path 4 for taking combustion gas in the inner space of the furnace 18 to the outside of the furnace and flowing it back to the inside of the furnace 18 from a different position. The out-of-furnace circulating path 4 includes: regenerative beds 5A and 5B at recirculating gas current intake and outlet openings 9A and 9B communicating with heating chambers 2; a circulating fan 6; a passage switching device 7 for selectively and alternately connecting an intake side and a discharge side of the circulating fan 6 with one of the regenerative beds 5A and 5B; and a heat removing means 8 for performing heat removal or dilution in order to change gaseity of the gas current in a section between the regenerative beds 5A and 5B, thereby forming inside the furnace 18 a high-temperature strong recirculating current 10 for periodically inverting a flow direction of the gas current by the passage switching device 7.
摘要:
A heat-recovering oven system based on temperature gradient comprises: multiple chambers arranged in a sequence, the chambers configured for operating at various temperatures according to a temperature gradient arrangement that spans the sequence; a conveyor configured for transporting product through the multiple chambers in the sequence for heat treatment according to the temperature gradient arrangement; and multiple temperature-segregated heat exchanger systems, each heat exchanger system including a heat exchanger, a conduit to at least one of the chambers based on its temperature in the temperature gradient arrangement, and a return conduit from the at least one chamber to the heat exchanger.
摘要:
The invention relates to a method for the closed-loop controlled operation of an, in particular regenerative, heated industrial furnace (100) comprising a furnace chamber (10), in particular having a melting tank, in particular for glass, comprising the steps of feeding fuel into the furnace chamber (10) via at least one fuel injector (20, 20') designed for injection of fuel, in particular virtually without any combustion air, and feeding a gaseous oxygen carrier, in particular combustion air and/or oxygen, to the furnace chamber (10), wherein the supply of fuel and the supply of the gaseous oxygen carrier, in particular combustion air and/or oxygen, is controlled, in particular automatically controlled, by means of a control loop, and a first adjustable control variable in the form of a fuel flow to the furnace chamber (10) and/or a second adjustable control variable in the form of a flow of the gaseous oxygen carrier, in particular combustion air flow and/or oxygen flow, to the furnace chamber (10) is set using a control element, wherein in the control loop an energy requirement (E) is determined, in particular as an energy SETPOINT value (SP_ENERGIE), and the energy requirement (E) of a quantity control (VB-R) for the gaseous oxygen carrier, in particular for a combustion air quantity and/or an oxygen quantity, and a fuel quantity control (BS-R) for the fuel is supplied, and the flow of the gaseous oxygen carrier, in particular of the combustion air flow and/or the oxygen flow, is determined, in particular as a process value of a flow of the gaseous oxygen carrier, in particular a combustion air volume flow (SP BRENNLUFT) and/or of an oxygen volume flow (SP_OXYGEN), and the fuel flow is determined, in particular as a process value of a fuel volume flow (SP_BRENNGAS).
摘要:
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.
摘要:
Provided are an exhaust gas processing system and method capable of effectively utilizing the sensible heat of an exhaust gas for preheating air for burner combustion in a rotary hearth type reducing furnace while preventing troubles caused by adhesion of dust such as blockage in an exhaust gas processing facility for a rotary hearth type reducing furnace and corrosive deterioration in the facility without increasing the facility costs excessively. The system comprises a radiant heat exchanger 2 for heat exchange between an exhaust gas exhausted from the rotary hearth type reducing furnace and air. The radiant heat exchanger 2 includes an inner cylinder 22 made of metal surrounding a space through which the exhaust gas flows; an outer cylinder 21 disposed on an outer side in a radial direction of the inner cylinder to define a flow channel between the inner cylinder and the outer cylinder 21 for allowing the air to flow so as to exchange heat with the exhaust gas; and a highly thermal conductive refractory 23 applied to an inner side of the inner cylinder 22 so as to cover an inner surface thereof.