WO2012101814A1 - 炉加熱用燃焼装置 - Google Patents
炉加熱用燃焼装置 Download PDFInfo
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- WO2012101814A1 WO2012101814A1 PCT/JP2011/051750 JP2011051750W WO2012101814A1 WO 2012101814 A1 WO2012101814 A1 WO 2012101814A1 JP 2011051750 W JP2011051750 W JP 2011051750W WO 2012101814 A1 WO2012101814 A1 WO 2012101814A1
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- Prior art keywords
- burner
- flow path
- combustion
- air
- furnace
- Prior art date
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
- F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/008—Flow control devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/56—Nozzles for spreading the flame over an area, e.g. for desurfacing of solid material, for surface hardening, or for heating workpieces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L1/00—Passages or apertures for delivering primary air for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L13/00—Construction of valves or dampers for controlling air supply or draught
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L13/00—Construction of valves or dampers for controlling air supply or draught
- F23L13/02—Construction of valves or dampers for controlling air supply or draught pivoted about a single axis but having not other movement
- F23L13/04—Construction of valves or dampers for controlling air supply or draught pivoted about a single axis but having not other movement with axis perpendicular to face
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
- F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel by discharging the air above the fire
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
- F23M9/02—Baffles or deflectors for air or combustion products; Flame shields in air inlets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/20—Burner staging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/11402—Airflow diaphragms at burner nozzle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14021—Premixing burners with swirling or vortices creating means for fuel or air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Definitions
- a wind box connected to the furnace wall in a state communicating with a flame passage hole formed in the furnace wall has a cylindrical tube portion on the furnace wall side, and combustion air is supplied from the combustion air supply means. It is provided in a supplied state, and is provided with a fuel flow path that allows gas fuel to flow at the center and a primary air flow path that allows primary air to flow to the outer periphery thereof, and is formed in a double tubular shape.
- a burner is provided in a state of penetrating a back wall portion located on the side of the wind box away from the furnace wall, and the tip of the burner is between the outer peripheral surface and the inner peripheral surface of the cylindrical portion.
- the present invention relates to a furnace heating combustion apparatus that is positioned inside the cylindrical portion in a state in which a secondary air flow path that allows air in the wind box to flow as secondary air is formed.
- Such a furnace heating combustion apparatus is used to heat various furnaces such as a melting furnace for melting an object to be melted such as glass or metal, and a heating furnace for heating an object to be heated such as a forged product.
- a burner is provided in a state extending over the entire length of the burner to form a fuel flow path, and a tip from a position located outside the wind box in the tubular body
- An air supply tubular body which is positioned so as to cover a portion extending over a portion, forms a primary air flow path with the tubular body, and forms a secondary air flow path with the tubular portion of the wind box;
- combustion air from a blower as combustion air supply means is supplied to the wind box, a portion located outside the wind box in the tubular body for air supply
- a portion located outside the wind box in the tubular body for air supply There is one configured to be supplied to (see, for example, Patent Document 1).
- JP 2002-13704 A (FIGS. 1 to 3)
- the burner portion located outside the burner wind box has a double tubular large diameter, which has the disadvantage of increasing the installation space, and combustion air from the blower
- the structure for supplying the combustion air to the burner is complicated, because the air supply tubular body is supplied to a portion located outside the wind box, There was an inconvenience that the installation space outside the furnace becomes large.
- the space outside the furnace is used for various purposes such as being used as a work space for maintenance and the like, and it is desired to make various devices arranged in the space compact.
- the conventional furnace heating combustor requires a large installation space outside the furnace in addition to the complicated configuration, and it is desired to make the apparatus compact.
- the ratio of the primary air amount flowing through the primary air passage and the secondary air amount flowing through the secondary air passage is adjusted to Combustion state in which the gas fuel to be ejected is sufficiently primary burned with sufficient primary air while secondary combustion is performed with secondary air, or gas fuel ejected from the fuel flow path is being burned with less primary air
- the amount of primary air flowing through the primary air flow path is desirable to be able to adjust the ratio with the amount of secondary air flowing through the secondary air flow path.
- the flow rate supplying combustion air from the blower to the wind box and the flow channel supplying combustion air from the blower to the air supply tubular body are provided with a damper for adjusting the air volume.
- the damper is provided, the installation space outside the furnace is further increased.
- the present invention has been made in view of the above circumstances, and its purpose is to determine the ratio between the amount of primary air flowing through the primary air flow path and the amount of secondary air flowing through the secondary air flow path.
- the object of the present invention is to provide a furnace heating combustion apparatus capable of simplifying the configuration and reducing the installation space outside the furnace while allowing adjustment.
- the combustion apparatus for furnace heating is such that a wind box connected to the furnace wall in a state of communicating with a flame passage hole formed in the furnace wall has a cylindrical tube portion on the furnace wall side and supplies combustion air Provided with combustion air supplied from the means, A long burner formed in a double tube having a fuel flow path for allowing gas fuel to flow in the center and a primary air flow path for allowing primary air to flow to the outer periphery of the fuel flow path. Provided in a state of penetrating the back wall portion located on the side away from the furnace wall, In the state where the tip of the burner forms a secondary air flow path for allowing the air in the wind box to flow as secondary air between the outer peripheral surface of the burner and the inner peripheral surface of the cylindrical portion.
- the primary air flow path provided in the burner is provided at the tip of the burner in a state in which air in the wind box is taken in from the rear end and flows to the tip side, and the burner has its tip Formed in a state where the diameter is larger than the other part of the burner, In order to change and adjust the ratio between the amount of primary air flowing through the primary air flow path and the amount of secondary air flowing through the secondary air flow path, the position of the burner can be adjusted in the longitudinal direction thereof.
- Burner support means is provided for supporting the back wall portion.
- a part of the combustion air supplied to the wind box from the combustion air supply means is taken in from the rear end of the primary air flow path located in the wind box, and passes through the primary air flow path as primary air.
- a part of the combustion air supplied to the wind box from the combustion air supply means is caused by the outer peripheral surface of the tip of the burner located in the wind box and the inner periphery of the cylinder part in the wind box.
- the secondary air flow path formed between the two surfaces is circulated as secondary air, and the gaseous fuel that flows through the fuel flow path and is ejected from the tip of the fuel flow path is the primary air and It will be mixed with secondary air and burned.
- the position of the burner is adjusted in the longitudinal direction with respect to the back wall portion of the wind box, the primary air amount flowing through the primary air flow path, and the secondary air amount flowing through the secondary air flow path, By changing and adjusting the ratio, the combustion state in which the gas fuel ejected from the fuel flow path is subjected to secondary combustion in the secondary air while being sufficiently primary burned in sufficient primary air, and the fuel is ejected from the fuel flow path.
- the combustion state of the burner can be switched, for example, by switching the combustion state in which secondary gas combustion is performed with sufficient secondary air while burning a small amount of gas fuel with primary air.
- the amount by which the tip of the burner is inserted into the tube portion of the wind box can be changed. If the amount inserted into the cylindrical portion of the tip portion is changed, the flow resistance of the secondary air flow path formed between the outer peripheral surface of the tip portion of the burner and the inner peripheral surface of the cylindrical portion in the wind box increases or decreases. Thus, the ratio of the primary air amount through which the combustion air supplied into the wind box flows through the primary air passage and the secondary air amount through the secondary air passage is changed and adjusted. .
- the portion located outside the wind box of the burner forms a fuel flow path through which gas fuel flows, but it is not necessary to form a primary air flow path, so the diameter is small, and the burner is installed outside the furnace. Space can be reduced. Further, although the ratio of the primary air flow through the primary air flow path and the secondary air flow through the secondary air flow path is changed and adjusted, the combustion air supply is performed outside the furnace. Since only the flow path for guiding the combustion air from the means to the wind box is provided, the configuration for supplying the combustion air is simplified, and the installation space for installing the configuration for supplying the combustion air outside the furnace Can be reduced.
- the supporting means for supporting the burner on the back wall portion of the wind box is prevented from being damaged by being heated by the combustion heat and adjusting the position of the burner in the longitudinal direction for a long period of time. Can be performed well.
- the flow path leading the combustion air supplied from the combustion air supply means to the primary air flow path and the secondary air flow path in the wind box It is conceivable to provide a damper in the wind box that partitions the flow path to be guided and adjusts the amount of air guided from the wind box to the flow path.
- the ratio of the primary air flow through the primary air flow path and the secondary air flow through the secondary air flow path can be adjusted, while simplifying the configuration.
- Fuel adjusting means for changing and adjusting the amount of gas fuel supplied to the burner is provided, It is preferable that the combustion air supply means is configured to be able to change and adjust the supply amount of the combustion air.
- the combustion amount of the gas fuel can be changed in a state where the state of supplying the air amount necessary for burning the supplied gas fuel is maintained.
- the burner is provided over the entire length of the fuel supply tubular body to form the fuel flow path, and is positioned so as to cover the tip of the tubular body.
- a cylindrical flow path forming body that forms a primary air flow path and forms the secondary air flow path between the air duct and the cylindrical portion of the wind box, a rear end portion of the flow path forming body, and the fuel supply It is preferable that it is formed in the state provided with the flame holding plate arrange
- the burner is configured to cover the tip of the fuel supply tubular body forming the fuel flow path with the flow path forming body. And since it has a flame-holding plate disposed between the rear end portion of the flow path forming body and the fuel supply tubular body and formed with air flow holes for taking in primary air, the amount of gas combustion When there is little, gas fuel can be burned favorably, flame-holding with a flame-holding plate. Further, when the amount of gas combustion is large, a large amount of gas fuel can be burned while holding the flame in the cylindrical portion of the wind box.
- the gas fuel can be burned while changing the flame holding mode between the case where the gas combustion amount is large and the case where the gas combustion amount is small, so that it can be burned well even if the gas combustion amount is changed in a large range.
- the gas combustion amount can be changed within a large range.
- a cylindrical burner support body on which the burner is movably fitted in its longitudinal direction is provided on the back wall portion of the wind box, and the positioning state for positioning the burner with respect to the burner support body and the positioning are released.
- a positioning body that can be switched to a release state is provided.
- the burner support means is a means for supporting the burner by the burner support so as to be movable in the longitudinal direction, and positioning the burner in the longitudinal direction by the positioning body.
- the positioning body is switched to a release state in which the positioning of the burner is released, and the burner is moved and adjusted in the longitudinal direction with respect to the cylindrical burner support provided on the back wall portion of the wind box, and the positioning body Adjusting the position of the burner in the longitudinal direction, that is, the ratio of the amount of primary air flowing through the primary air flow path to the amount of secondary air flowing through the secondary air flow path Can do.
- the positioning body can be configured by a pressing bolt that is screwed to the burner support so as to be movable in the radial direction and presses the outer surface of the burner.
- the overall configuration can be simplified by simplifying the burner support means. Can be achieved.
- preheating means for preheating the combustion air supplied from the combustion air supply means with the exhaust gas discharged from the furnace is provided.
- the inside of the furnace can be efficiently heated to a high temperature.
- the support means for supporting the burner on the back wall portion of the wind box suppresses the damage caused by heating by the combustion heat, and the position adjustment of the burner in the longitudinal direction is prevented for a long time. Can be carried out satisfactorily.
- the combustion apparatus for furnace heating of the present embodiment is exemplified for use in heating a glass melting furnace G as shown in FIG. To do. That is, the glass melting furnace G is configured to include the melting tank 2 below the inside of the furnace body 1, and the furnace heating combustion device is placed sideways (that is, horizontally) in the furnace space above the melting tank 2. The gas fuel is combusted in a state where the flame F is formed.
- the furnace heating combustion apparatus includes a fuel flow path R through which gas fuel flows at the center and a primary air flow path A1 through which primary air flows at the outer periphery.
- a long burner B formed in a tubular shape, a wind box 4 connected to the furnace wall 1A in the furnace body 1 in a state communicating with the flame passage hole 3, and an air flow path 6 to the wind box 4
- a blower fan K as combustion air supply means for supplying combustion air through is provided.
- the air flow path 6 is provided with a heat exchanging portion E as preheating means for preheating the combustion air supplied from the blower fan K with the exhaust gas discharged from the inside of the furnace.
- the furnace temperature is set to 1000 ° C., for example.
- the wind box 4 is formed in a state in which the whole is in a cylindrical shape in a sideways posture (that is, a posture extending horizontally) and the back portion is closed by a back wall portion 4A located on the side away from the furnace wall 1A. And the inflow port 5 of the combustion air is formed in the upper part. And the front-end
- the cylindrical portion T is defined as a cylindrical portion in the wind box 4 between the outer surface of the furnace wall 1A and the point closest to the outer surface of the furnace wall 1A of the inflow port 5 for combustion air.
- the burner B is provided in a state of penetrating the back wall portion 4 ⁇ / b> A in the wind box 4, and its tip end portion is the outer peripheral surface and the inner peripheral surface of the tubular portion T of the wind box 4.
- the secondary air flow path A2 for allowing the air in the wind box to flow as secondary air is formed between and the cylinder portion T.
- tip part of the burner B is formed larger diameter than the other part of the burner B.
- the primary air flow path A1 provided to the burner B is in a state in which the air in the air box is taken into the front end portion of the burner B from the rear end portion of the flow path forming body 8 described below and flows to the front end side. Is provided.
- the burner B will be described with reference to FIGS. 4 and 5 as well.
- the burner B is provided in a state extending over its entire length to form the fuel flow path R, and the tubular body.
- 7 is a tube that is positioned so as to cover the tip of the tube 7, forms a primary air channel A 1 with the tubular body 7, and forms a secondary air channel A 2 with the tube part T of the wind box 4.
- a flame holding plate 9 disposed between the rear end portion of the flow path forming body 8 and the tubular body 7 and having an air flow hole S for taking in primary air. It is formed in a prepared state.
- the tubular body 7 includes a cylindrical body 7A on the proximal end side, an intermediate cylindrical body 7B that is externally fitted on the distal end of the cylindrical body 7A on the proximal end side, and a distal cylinder connected to the intermediate cylindrical body 7B.
- a gas fuel supply pipe 10 that supplies gas fuel is connected to the rear end portion of the cylinder 7A on the base end side.
- the intermediate cylinder 7B, the tip cylinder 7C, and the flame holding plate 9 are integrally formed as a nozzle, and the intermediate cylinder 7B in the nozzle is a base cylinder 7A.
- the gas fuel supply pipe 10 is configured using a flexible pipe that can be bent and extended so as to allow the burner B to be adjusted in its longitudinal direction.
- the flame holding plate 9 is positioned at an interval along the outer circumferential direction of the plate body 9A and the annular plate body 9A that is externally fitted to the cylindrical body 7C at the tip of the tubular body 7, and the plate body 9A.
- a support body 9B that connects the flow path forming body 8 and the air circulation hole S is formed between the plate body 9A and the flow path forming body 8 and between the adjacent support bodies 9B.
- a cooling hole U through which air flows for cooling is formed in the inner peripheral edge portion and the outer peripheral edge portion of the plate body 9A as a measure for preventing the flame holding plate 9 from burning.
- a plurality of ejection holes 14 for ejecting gas fuel into the primary air flow path A1 are formed at intervals in the circumferential direction to improve flame holding performance.
- a fuel adjustment valve V is provided as a fuel adjustment means for changing and adjusting the amount of gas fuel supplied to the burner B, and the blower fan K changes and adjusts the supply amount of combustion air. Accordingly, the rotational speed is freely adjustable.
- Control means H connected to the fuel regulating valve V and the blower fan K and controlling these operations is provided. Based on the combustion amount set by the combustion amount setting device W, the control means H supplies an amount of fuel corresponding to the set combustion amount to the burner B, and an amount corresponding to the set combustion amount. In order to supply combustion air to the wind box 4, the opening adjustment of the fuel adjustment valve V and the speed adjustment of the blower fan K are performed.
- the control unit H includes a CPU, a memory, and a communication unit, and an algorithm for implementing the function of the control unit H is stored in the memory.
- Burner support means D is provided for supporting B with respect to the back wall 4A of the wind box 4 so that the position of B can be adjusted in the longitudinal direction.
- the cylindrical burner support 12 to which the burner B is movably fitted in the longitudinal direction is fixed to the back wall portion 4A by a bolt with the annular plate portion 12A attached to the outside thereof, It is provided on the back wall portion 4 ⁇ / b> A of the wind box 4.
- the burner support body 12 As a positioning body that can be switched between a positioning state for positioning the burner with respect to the burner support body 12 and a release state for releasing the positioning, the burner support body 12 is screwed so as to be movable in the radial direction.
- a pressing bolt 13 that presses the outer surface is provided.
- the burner support means D is configured as means for supporting the burner B by the burner support 12 so as to be movable in the longitudinal direction, and positioning the movement of the burner B in the longitudinal direction by the pressing bolt 13. .
- the outer surface of the tubular body 7 in the burner B is provided with a scale with an interval in the longitudinal direction. Using this scale as a guide, the scale in the longitudinal direction of the burner B with respect to the burner support 12 is provided. By confirming the position, the insertion amount of the tip of the burner B with respect to the tube portion T of the wind box 4 can be recognized.
- the inner diameter P of the cylindrical portion T in the wind box 4 is 200 mm
- the outer diameter of the tip of the burner B that is, the outer diameter Q of the flow path forming body 8 is approximately.
- the length M of the flow path forming body 8 is approximately 110 mm
- the inner diameter N of the cylindrical body 7C at the tip of the tubular body 7 is 80 mm
- the length L of the cylindrical portion T is approximately 200 mm.
- the ratio (Q / P) of the outer diameter Q of the flow path forming body 8 to the inner diameter P of the cylindrical portion T is preferably set to 0.8 to 0.95.
- the length M is preferably set to a length in the range of 1/2 to 3/4 of the inner diameter P of the cylindrical portion T.
- the flow rate of the gas fuel is adjusted in the range of 50 to 100 Nm3 / H
- the flow rate of the combustion air is adjusted in the range of approximately 600 to 1200 Nm3 / H
- the burner B As shown in FIG. 2, by adjusting the position in the longitudinal direction, the entire tip of the burner B is inserted into the cylindrical portion T, and the length of the tip of the burner B as shown in FIG. The length for inserting the tip end portion of the burner B into the inside of the tube portion T is changed in a range between the state where half of M is inserted into the inside of the tube portion T.
- the furnace heating combustion apparatus of the present invention is applied to the glass melting furnace G.
- the furnace heating combustion apparatus of the present invention is applied to various heating furnaces such as a forging furnace. It can be done.
- the burner support means D is configured by the cylindrical burner support body 12 and the positioning body 13 in which the burner B is movably fitted in the longitudinal direction thereof is exemplified.
- the specific configuration of the support means D can be variously changed. For example, when the friction between the burner support 12 and the burner B is sufficiently large, the positioning body is not always necessary. Further, as the positioning body, resin, rubber, or other material that increases the friction coefficient disposed between the burner support 12 and the burner B can be used.
- the flame holding plate 9 is exemplified by the plate body 9A and the support plate 9B.
- the air circulation hole S is formed by forming a notch or a hole in the outer peripheral portion.
- Various modifications can be made to the specific configuration of the flame holding plate 9 such as the flame holding plate 9 being constituted by a single plate-like body.
- the furnace heating combustion apparatus is used to heat various furnaces such as a melting furnace for melting a material to be melted such as glass or metal, and a heating furnace for heating a material to be heated such as a forged product. Can do.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Abstract
Description
このような炉加熱用燃焼装置として、バーナが、バーナ全長に亘る状態で設けられて燃料流路を形成する燃料供給用の管状体と、その管状体における風箱の外部に位置する箇所から先端箇所に亘る部分を覆うように位置して、管状体との間に一次空気流路を形成し且つ風箱の筒部との間に二次空気流路を形成する空気供給用の管状体とを備える形態に構成され、そして、燃焼用空気供給手段としての送風機からの燃焼用空気が、風箱に供給されるのに加えて、空気供給用の管状体における風箱の外部に位置する部分に供給されるように構成されたものがある(例えば、特許文献1参照)。
つまり、炉外部の空間は、メンテナンス等を行う作業空間として利用されることになる等、種々の目的に使用されるものであり、その空間に配置する種々の機器類のコンパクト化が望まれるものとなるが、従来の炉加熱用燃焼装置は、構成が複雑であることに加えて、炉外部において大きな設置スペースを必要とするものであり、コンパクト化が望まれるものであった。
そして、従来の炉加熱用燃焼装置において、一次空気流路を通流する一次空気量と二次空気流路を通流する二次空気量との比を調整できるようにするには、一般に、送風機から風箱に燃焼用空気を供給する流路や、送風機から空気供給用の管状体に燃焼用空気を供給する流路に、風量調整用のダンパを備えさせることになるが、このようにダンパを備えさせるようにすると、炉外部における設置スペースが一層大きくなるものであった。
中央部にガス燃料を通流させる燃料流路を備え且つその外周部に一次空気を通流させる一次空気流路を備える二重管状に形成された長尺状のバーナが、前記風箱における前記炉壁から離間する側に位置する背壁部を貫通する状態で設けられ、
前記バーナの先端部が、その外周面と前記筒部の内周面との間に前記風箱内の空気を二次空気として通流させる二次空気流路を形成する状態で、前記筒部の内部に位置されているものであって、
前記バーナに備えさせる前記一次空気流路が、前記バーナの先端部に、前記風箱内の空気を後端部より取り入れて先端側に通流させる状態で設けられて、前記バーナが、その先端部を前記バーナの他の部分よりも大径にする状態に形成され、
前記一次空気流路を通流する一次空気量と前記二次空気流路を通流する二次空気量との比を変更調整すべく、前記バーナをその長手方向に位置調整自在に前記風箱の背壁部に対して支持するバーナ支持手段が設けられている。
また、一次空気流路を通流する一次空気量と前記二次空気流路を通流する二次空気量との比を変更調整するものでありながらも、炉外部においては、燃焼用空気供給手段からの燃焼用空気を風箱に導く流路を設けるだけとなるため、燃焼用空気を供給する構成の簡素化、及び、燃焼用空気を供給するための構成を炉外部における設置する設置スペースの減少化を図ることができる。
前記バーナに供給するガス燃料供給量を変更調整する燃料調整手段が設けられ、
前記燃焼用空気供給手段が、燃焼用空気の供給量を変更調整自在に構成されていることが好ましい。
前記バーナが、その全長に亘る状態で設けられて前記燃料流路を形成する燃料供給用の管状体と、その管状体の先端部を覆うように位置して、その管状体との間に前記一次空気流路を形成し且つ前記風箱の筒部との間に前記二次空気流路を形成する筒状の流路形成体と、その流路形成体の後端部と前記燃料供給用の管状体との間に配置され且つ一次空気取り入れ用の空気通流孔が形成された保炎板とを備える状態で形成されていることが好ましい。
そして、流路形成体の後端部と前記燃料供給用の管状体との間に配置され且つ一次空気取り入れ用の空気通流孔が形成された保炎板を備えているから、ガス燃焼量が少ないときに、保炎板にて保炎しながらガス燃料を良好に燃焼させることができる。
また、ガス燃焼量が多いときには、風箱における筒部にて保炎させながら多量のガス燃料を燃焼させることができる。
このように、ガス燃焼量が多い場合と少ない場合とで保炎の形態を変更させながら、ガス燃料を燃焼させることができるので、ガス燃焼量を大きな範囲で変更させても良好に燃焼させることができる、換言すれば、ガス燃焼量を大きな範囲で変更させることができる。
前記バーナがその長手方向に移動自在に嵌合する筒状のバーナ支持体が、前記風箱の背壁部に設けられ、そのバーナ支持体に対して前記バーナを位置決めする位置決め状態と位置決めを解除する解除状態とに切換え自在な位置決め体が設けられ、
前記バーナ支持手段が、前記バーナ支持体にて前記バーナをその長手方向に移動自在に支持し、かつ、前記バーナの長手方向の移動を前記位置決め体にて位置決めする手段であることが好ましい。
ちなみに、位置決め体としては、バーナ支持体に対してその径方向に移動自在に螺合して、バーナの外面を押圧する押圧ボルトにて構成することができる。
前記燃焼用空気供給手段から供給される燃焼用空気を炉内から排出される排気ガスにて予熱する予熱手段が設けられていることが好ましい。
ちなみに、このように燃焼用空気が予熱される場合には、風箱内は一層高温になるものであるが、風箱の背壁部は、外気にて冷却されるものとなるため、燃焼用空気を予熱する場合においても、バーナを風箱の背壁部に支持する支持手段が、燃焼熱により加熱されて損傷することを抑制して、バーナをその長手方向に位置調整することを長期間に亘って良好に行えるものとなる。
以下、本発明の炉加熱用燃焼装置の実施形態を図面に基づいて説明する
本実施形態の炉加熱用燃焼装置は、図1に示すように、ガラス溶解炉Gの加熱用として用いる場合を例示するものである。
すなわち、ガラス溶解炉Gが、炉本体1の内部の下方に溶解槽2を備えるように構成され、炉加熱用燃焼装置が、溶解槽2の上方の炉内空間に、横向き(すなわち水平方向)の火炎Fを形成する状態でガス燃料を燃焼させるように構成されている。
空気流路6には、送風ファンKから供給される燃焼用空気を炉内から排出される排気ガスにて予熱する予熱手段としての熱交換部Eが設けられて、燃焼用空気が例えば600℃に予熱されるように構成され、そして、炉内温度が例えば1000℃になるように構成されている。
そして、バーナBの先端部は、バーナBの他の部分よりも大径に形成されている。バーナBに備えさせる一次空気流路A1が、バーナBの先端部に、風箱内の空気を、下で説明される流路形成体8の後端部より取り入れて先端側に通流させる状態で設けられている。
ちなみに、中間の筒体7B、先端の筒体7C、及び、保炎板9が、ノズルとして、一体的に形成され、そして、そのノズルにおける中間の筒体7Bが、基端側の筒体7Aに対して、螺合する状態で外嵌着されるように構成されている。
尚、ガス燃料供給管10は、後述の如く、バーナBがその長手方向に位置調整することを許容すべく、屈伸自在なフレキシブル管を用いて構成されている。
尚、板体9Aの内周縁部と外周縁部とに、保炎板9の焼け防止対策として、冷却のために空気を通流させる冷却孔Uが形成され、また、先端の筒体7Cにおける板体9Aの近くには、ガス燃料を一次空気流路A1に噴出する噴出孔14が周方向に間隔を隔てて複数形成されて、保炎性を向上させるようになっている。
燃料調整弁V及び送風ファンKに接続され、これらの作動を制御する制御手段Hが設けられている。この制御手段Hは、燃焼量設定器Wにて設定される燃焼量に基づいて、設定された燃焼量に対応する量の燃料をバーナBに供給し、設定された燃焼量に対応する量の燃焼用空気を風箱4に供給すべく、燃料調整弁Vの開度調整及び送風ファンKの速度調整を行うように構成されている。制御手段Hは、CPUやメモリや通信ユニットを有し、制御手段Hが有する機能を実施するためのアルゴリズムがメモリに記憶されている。
説明を加えると、バーナBがその長手方向に移動自在に嵌合する筒状のバーナ支持体12が、その外部に付設した環状の板部12Aを背壁部4Aにボルトによって固定する状態で、風箱4の背壁部4Aに設けられている。そのバーナ支持体12に対してバーナを位置決めする位置決め状態と位置決めを解除する解除状態とに切換え自在な位置決め体として、バーナ支持体に対してその径方向に移動自在に螺合して、バーナの外面を押圧する押圧ボルト13が設けられている。
そして、バーナ支持手段Dが、バーナ支持体12にてバーナBをその長手方向に移動自在に支持し、かつ、バーナBの長手方向の移動を押圧ボルト13にて位置決めする手段として構成されている。
但し、流路形成体8の外径Qの筒部Tの内径Pに対する比(Q/P)は、0.8~0.95に設定することが望ましく、また、流路形成体8の長さMは、筒部Tの内径Pに対して、その1/2~3/4の範囲の長さに設定することが望ましいものである。
ガス燃料の供給量が少ない、つまりガス燃料の流量が少ないときには、図2に示すように、バーナBの先端部の全体を筒部Tの内部に挿入させる状態にして、2次空気流路A2を通して燃焼用空気が流れ難いようにして、一次空気流路A1を通して燃焼用空気を十分に流動させるようにしながら、保炎板9にて保炎しながらガス燃料を燃焼させることができる。
ちなみに、この運転方法においては、ガス燃料の供給量の多少により火炎Fの長さは長短に変化するものの、ガス燃料の供給量の多少に拘わらず、火炎Fの先端側の温度を高温化できるものとなる。
次に別実施形態を説明する。
(1)上記実施形態においては、本発明の炉加熱用燃焼装置をガラス溶解炉Gに適用した場合を例示したが、本発明の炉加熱用燃焼装置は鍛造炉等の各種の加熱炉に適用できるものである。
そして、複数のバーナBを配設した場合において、複数のバーナBの燃焼量は、必ずしも同じになるように調整する必要はなく、異なる燃焼量にて燃焼するように調整してもよい。
3 火炎通過孔
4 風箱
4A 背壁部
7 管状体
8 流路形成体
9 保炎板
12 バーナ支持体
13 位置決め体
A1 一次空気流路
A2 二次空気流路
B バーナ
D バーナ支持手段
K 燃焼用空気供給手段
R 燃料流路
S 空気流通孔
T 筒部
V 燃料調整手段
Claims (5)
- 炉壁に形成した火炎通過孔に連通する状態で前記炉壁に接続される風箱が、炉壁側に円筒状の筒部を備え且つ燃焼用空気供給手段から燃焼用空気が供給される状態で設けられ、
中央部にガス燃料を通流させる燃料流路を備え且つその外周部に一次空気を通流させる一次空気流路を備える二重管状に形成された長尺状のバーナが、前記風箱における前記炉壁から離間する側に位置する背壁部を貫通する状態で設けられ、
前記バーナの先端部が、その外周面と前記筒部の内周面との間に前記風箱内の空気を二次空気として通流させる二次空気流路を形成する状態で、前記筒部の内部に位置されている炉加熱用燃焼装置であって、
前記バーナに備えさせる前記一次空気流路が、前記バーナの先端部に、前記風箱内の空気を後端部より取り入れて先端側に通流させる状態で設けられて、前記バーナが、その先端部を前記バーナの他の部分よりも大径にする状態に形成され、
前記一次空気流路を通流する一次空気量と前記二次空気流路を通流する二次空気量との比を変更調整すべく、前記バーナをその長手方向に位置調整自在に前記風箱の背壁部に対して支持するバーナ支持手段が設けられている炉加熱用燃焼装置。 - 前記バーナに供給するガス燃料供給量を変更調整する燃料調整手段が設けられ、
前記燃焼用空気供給手段が、燃焼用空気の供給量を変更調整自在に構成されている請求項1記載の炉加熱用燃焼装置。 - 前記バーナが、その全長に亘る状態で設けられて前記燃料流路を形成する燃料供給用の管状体と、その管状体の先端部を覆うように位置して、その管状体との間に前記一次空気流路を形成し且つ前記風箱の筒部との間に前記二次空気流路を形成する筒状の流路形成体と、その流路形成体の後端部と前記燃料供給用の管状体との間に配置され且つ一次空気取り入れ用の空気通流孔が形成された保炎板とを備える状態で形成されている請求項2に記載の炉加熱用燃焼装置。
- 前記バーナがその長手方向に移動自在に嵌合する筒状のバーナ支持体が、前記風箱の背壁部に設けられ、そのバーナ支持体に対して前記バーナを位置決めする位置決め状態と位置決めを解除する解除状態とに切換え自在な位置決め体が設けられ、
前記バーナ支持手段が、前記バーナ支持体にて前記バーナをその長手方向に移動自在に支持し、かつ、前記バーナの長手方向の移動を前記位置決め体にて位置決めする手段である請求項1~3のいずれか1項に記載の炉加熱用燃焼装置。 - 前記燃焼用空気供給手段から供給される燃焼用空気を炉内から排出される排気ガスにて予熱する予熱手段が設けられている請求項1~3のいずれか1項に記載の炉加熱用燃焼装置。
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- 2011-01-28 CN CN201180066106.6A patent/CN103328888B/zh not_active Expired - Fee Related
- 2011-01-28 WO PCT/JP2011/051750 patent/WO2012101814A1/ja active Application Filing
- 2011-01-28 SG SG2013055637A patent/SG192070A1/en unknown
- 2011-01-28 KR KR1020137022601A patent/KR101809574B1/ko active IP Right Grant
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Also Published As
Publication number | Publication date |
---|---|
CA2825371A1 (en) | 2012-08-02 |
EP2669574A1 (en) | 2013-12-04 |
US20140041559A1 (en) | 2014-02-13 |
KR20140023894A (ko) | 2014-02-27 |
CA2825371C (en) | 2018-01-23 |
CN103328888B (zh) | 2015-07-08 |
KR101809574B1 (ko) | 2017-12-15 |
SG192070A1 (en) | 2013-08-30 |
EP2669574A4 (en) | 2014-07-02 |
US9677760B2 (en) | 2017-06-13 |
CN103328888A (zh) | 2013-09-25 |
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