JP2001027412A - Regenerative combustion burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase an air supply pressure and to reduce and NOx by providing a thermal storage material separated to a plurality of portions, burner tiles having an air supply and exhaust surface having an opened vent hole, and a switching mechanism of a specific structure having a rotary disc and a fixed disc brought into surface contact with one another separably from each other. SOLUTION: In the regenerative combustion burner 1 in an industrial furnace 100, burner tiles in which a fuel injection nozzle 20 is inserted into a center are disposed at one axial side of a thermal storage material 30 separated into a plurality of portions in a circumferential direction, and a switching mechanism 40 is arranged at an another axial direction of the material 30. The mechanism 40 has a rotary disc 44 and a fixed disc 46 brought into slidable surface contact with one another and an air supply and exhaust partition wall 41 to communicate or shut off a plurality of ventilation openings 42, 43 by a rotation of the disc 44. An air supply to the burner 1 is conducted through an air supply passage 2 by operating an air supply means 4 to the burner 1, and an air exhaust is induction exhausted through an exhaust passage 3 by operating an exhaust induced draft fan 101.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage device in which exhaust gas is stored in a heat storage device by passing exhaust gas through a heat storage device, heat of the exhaust gas is stored in the heat storage device, and the flow of air supply and exhaust gas is alternately switched. TECHNICAL FIELD The present invention relates to an industrial furnace, a regenerative combustion burner, and a method for burning an industrial furnace, which performs warm regenerative combustion.

[0002]

2. Description of the Related Art Japanese Patent Laying-Open No. 5-256423 discloses an alternately switching type combustion burner. There, the regenerator is integrated into the burner body, but the switching valve is installed outside the burner body and connected to the burner body by piping. However, the conventional heat storage combustion burner has the following problems. Since the supply / exhaust switching valve is separate from the burner main body, piping for connecting the two is required, and there are problems such as the necessity of construction and an increase in the size of the piping distribution device. Further, since the volume from the switching valve to the combustion nozzle becomes large, the purge time at the time of switching becomes long. In order to solve the above-mentioned problem, one of the applicants of the present application has previously proposed a burner for heat storage combustion in which a switching mechanism is integrated into a burner body. There, the heat storage was partitioned by a partition, a rotating disk was slid on the partition wall end face, and the rotating disk was rotated to switch the flow of air supply and exhaust to the heat storage.

[0003]

However, the heat storage combustion burner has the following problems. Since the same vent hole is used as an air supply hole and an exhaust hole by switching the supply and exhaust, the cross-sectional area of the air supply passage and the cross-sectional area of the exhaust passage are the same. It is difficult. As a result, the exhaust gas in the furnace is trapped in the air supply and the circulation is so small that it is difficult to suppress NOx generation. Problems such as difficulty in reaching are caused. Further, air leaks between the end face of the partition wall and the rotating disk, and the supply air tends to short-circuit to the exhaust air. As a result, the supply air flow rate is reduced and the above problem is more likely to occur. In addition, insufficient air is supplied to the combustion to cause incomplete combustion, and the C
Problems such as an increase in O occur. The object of the present invention is
An object of the present invention is to provide an industrial furnace, a regenerative combustion burner, and a method for burning an industrial furnace, which can increase the flow rate of air supply.

[0004]

The present invention to achieve the above object is as follows. (1) A heat storage body divided into a plurality of parts, a hole arranged on one side in the axial direction of the heat storage body, into which a fuel injection nozzle is inserted, a plurality of ventilation holes for switching between supply and discharge, and the ventilation holes A burner tile having an air supply / exhaust surface having an opening, a rotating disk and a fixed disk disposed on the other axial side of the heat storage body and slidably in surface contact with each other, and further comprising a supply / exhaust partition. A wall, wherein the fixed disk has a plurality of through holes, the rotating disk has a plurality of ventilation openings which are communicated and blocked by the rotation of the rotating disk, and the ventilation openings are the partitions. A switching mechanism including an air supply ventilation opening communicating with one side of the wall and an exhaust ventilation opening communicating with the other side of the partition wall, wherein the heat storage element, the burner tile, The switching mechanism is separable from each other, and the heat storage body and the bar An industrial furnace, wherein at least one of the switching mechanism is fixed to the furnace body and forms a part of the furnace body. (2) The sum of the passage cross-sectional areas of the ventilation holes covered by the exhaust ventilation opening among the plurality of ventilation holes provided in the burner tile is the ventilation hole covered by the air supply passage opening. The industry according to (1), wherein a shape and a relative positional relationship between the ventilation opening provided in the rotating disk and the through hole provided in the fixing disk are set so as to be equal to or greater than the sum of the cross-sectional areas of the passages. Furnace. (3) The sum of the volume of the heat storage portion covered by the exhaust passage opening in the heat storage portion divided into a plurality of portions is equal to the volume of the heat storage portion covered by the air supply ventilation opening. The industrial furnace according to (1), wherein a shape and a relative positional relationship between the ventilation opening provided in the rotary disk and the through hole provided in the fixing disk are set so as to be equal to or greater than the sum. (4) The industrial furnace according to (1), wherein an air supply blower is directly connected to a portion of the switching mechanism that communicates with the air supply ventilation opening. (5) The industrial furnace according to (1), wherein an exhaust fan is directly connected to a portion of the switching mechanism that communicates with the exhaust ventilation opening. (6) A portion of the switching mechanism, which directly connects the air supply blower to the portion of the switching mechanism communicating with the air supply ventilation opening, and a portion of the switching mechanism which communicates with the exhaust ventilation opening of the switching mechanism. The industrial furnace according to (1), which is directly connected to (1). (7) A portion of the switching mechanism that directly connects the air supply blower to the portion that communicates with the air supply ventilation opening, and a portion of the switching mechanism that communicates with the exhaust ventilation opening of the switching mechanism. The industrial furnace according to (1), wherein the supply blower and the exhaust fan are directly driven by the same driving means. (8) The industrial furnace according to (1), wherein the heat storage body is divided into a plurality of heat storage body portions in the axial direction, and a gap for generating a turbulent flow field is provided between the heat storage body portions. (9) The industrial furnace according to (1), further including a partition for separating the heat storage body, the partition extending radially, and the partition wall of the switching mechanism extending in a circumferential direction. (10) The industrial furnace according to (1), wherein the rotating disk is a disk that is rotated only in one direction. (11) The industrial furnace according to (1), wherein the rotating drive means of the rotating disk comprises a motor. (12) The industrial furnace according to (1), wherein a drive motor for rotating a rotating portion of the switching mechanism is installed on a side of the inner and outer peripheries of the partition wall where the air supply ventilation opening is provided. (13) The rotating disk of the switching mechanism is a three-dimensional disk, and the fixed disk side ends of the air supply ventilation opening and the exhaust ventilation opening formed in the rotation disk are on the same circumference. The industrial furnace according to (1), wherein the through holes provided in the fixed disk are shared by air supply and exhaust and are arranged on the same circumference. (14) The rotating disk of the switching mechanism is a three-dimensional disk, and the fixed disk side ends of the air supply ventilation opening and the exhaust ventilation opening formed in the rotation disk are on the same circumference. An air supply passage connected to the air supply opening from the upstream side is connected to the switching mechanism in the axial direction, and an exhaust passage connected to the exhaust air opening from the downstream side is provided. The industrial furnace according to (1), wherein the furnace is connected to the switching mechanism in a direction perpendicular to an axial direction. (15) The industrial furnace according to claim 1, further comprising an exhaust attraction mechanism for ejecting air toward the downstream side of the exhaust flow at a downstream side of the exhaust flow at the exhaust ventilation opening. (16) The industrial furnace according to (1), wherein each part of the plurality of separated heat storage bodies is housed in a cylindrical sleeve. (17) Each part of the heat storage body separated into a plurality is accommodated in a cylindrical sleeve, and the ventilation hole of the burner tile has a funnel-shaped portion expanding toward the upstream side. The industrial furnace according to (1), which is smoothly connected to the cylindrical sleeve via the funnel. (18) The industrial furnace according to (1), wherein the rotating disk and the fixed disk are sealed by metal surface contact, and the rotating disk is pressed against the fixed disk by a spring bias. (19) The industrial furnace according to (1), wherein the ventilation holes provided in the rotating disk have a fan shape, and the through holes provided in the fixed disk also have a fan shape. (20) The industrial furnace according to (1), wherein the rotating disk is a disk that is reciprocally rotated. (21) The industrial furnace according to (1), wherein the driving means for reciprocatingly rotating the rotating disk is an air cylinder. (22) The switching mechanism includes a rotating disk that selectively takes a first position and a second position and that is reciprocated between the first position and the second position. The industrial furnace according to (1), wherein the shutter switches between the first position and the second position without forming a portion through which air supply or exhaust does not flow in a part of the plurality of divided portions. (23) The apparatus further includes a fuel supply amount adjusting mechanism that throttles fuel when the air supply ventilation opening of the rotating disk reaches the portion between the through holes of the fixed disk and the air supply is reduced. ). (24) The industrial furnace according to (1), wherein the exhaust ventilation opening of the rotating disk always takes a position where at least a part thereof is not closed by a portion between the through holes of the fixed disk. (25) The industrial furnace according to (1), wherein the switching mechanism comprises a porous shutter having three or more ventilation openings. (26) The industrial furnace is a melting furnace, a sintering furnace, a preheating furnace,
Soaking furnace, forging furnace, heating furnace, annealing furnace, soaking furnace, plating furnace, drying furnace, tempering furnace, quenching furnace, tempering furnace, redox furnace, baking furnace, baking furnace, roasting furnace, melting and holding Furnace, forehearth, crucible furnace, homogenizing furnace, aging furnace, reaction furnace, distillation furnace, ladle drying preheating furnace, mold firing preheating furnace, normalizing furnace, brazing furnace, carburizing furnace, coating drying furnace, holding furnace 2. The industrial furnace according to claim 1, wherein the furnace is a kind of furnace selected from the group consisting of a nitriding furnace, a salt bath furnace, a glass melting furnace, a boiler including a power boiler, an incinerator including a refuse incinerator, and a hot water supply device. (27) A heat storage body divided into a plurality of portions, a hole arranged on one side in the axial direction of the heat storage body, into which a fuel injection nozzle is inserted, a plurality of ventilation holes for switching between supply and discharge, and the ventilation holes A burner tile having an air supply / exhaust surface having an opening, a rotating disk and a fixed disk disposed on the other axial side of the heat storage body and slidably in surface contact with each other, and further comprising a supply / exhaust partition. A wall, the fixed disk has a plurality of through holes, and the rotating disk has a plurality of ventilation openings that are communicated and blocked by the rotation of the rotating disk,
A switching mechanism including an air supply ventilation opening communicating with one side of the partition wall and an exhaust ventilation opening communicating with the other side of the partition wall; Burner. (28) The sum of the passage cross-sectional areas of the ventilation holes covered by the exhaust ventilation opening among the plurality of ventilation holes provided in the burner tile is the ventilation hole covered by the air supply ventilation opening. (27) The heat storage according to (27), wherein the shape and the relative positional relationship between the ventilation opening provided in the rotating disk and the through hole provided in the fixing disk are set so as to be equal to or greater than the sum of the cross-sectional areas of the passages. Burner for combustion. (29) The heat storage combustion burner according to (27), wherein the air supply blower is directly connected to a portion of the switching mechanism that communicates with the air supply ventilation opening. (30) The heat storage combustion burner according to (27), wherein an exhaust fan is directly connected to a portion of the switching mechanism that communicates with the exhaust ventilation opening. (31) A portion of the switching mechanism that directly connects the air supply blower to the portion that communicates with the air supply ventilation opening, and a portion of the switching mechanism that communicates with the exhaust ventilation opening of the switching mechanism. (27) The burner for heat storage combustion according to (27), which is directly connected to. (32) A portion of the switching mechanism that directly connects the air supply blower to the portion that communicates with the air supply ventilation opening, and a portion of the switching mechanism that communicates with the exhaust ventilation opening of the switching mechanism. (27), wherein the air supply blower and the exhaust fan are driven by the same driving means. (33) The sum of the volume of the heat storage portion covered by the exhaust passage opening in the heat storage portion divided into a plurality of portions is equal to the volume of the heat storage portion covered by the air supply ventilation opening. (27) The heat storage combustion burner according to (27), wherein a shape and a relative positional relationship between the ventilation opening provided in the rotating disk and the through hole provided in the fixing disk are set so as to be equal to or greater than the sum. (34) The heat storage and combustion burner according to (27), further including a partition for separating the heat storage body, the partition extending radially, and the partition wall of the switching mechanism extending in a circumferential direction. (35) The heat storage combustion burner according to (27), wherein the heat storage element is divided into a plurality of heat storage elements in the axial direction, and a gap for generating a turbulent flow field is provided between the heat storage elements. (36) The heat storage combustion burner according to (27), wherein the rotating disk is a disk that is rotated only in one direction. (37) The heat storage combustion burner according to (27), wherein the rotation drive means of the rotary disk comprises a motor. (38) The heat storage combustion burner according to (27), wherein a drive motor for rotating a rotating portion of the switching mechanism is installed on a side of the inner and outer peripheries of the partition wall where an air supply ventilation opening is provided. (39) The rotating disk of the switching mechanism is formed of a three-dimensional disk, and the air supply ventilation opening and the exhaust ventilation opening formed in the rotation disk are provided on the same circumference, and the fixed disk is fixed. (27) The burner for heat storage combustion according to (27), wherein the through-hole provided in the disk is shared by the air supply and the exhaust and is arranged on the same circumference. (40) The rotating disk of the switching mechanism is a three-dimensional disk, and the fixed disk side ends of the air supply ventilation opening and the exhaust ventilation opening formed in the rotation disk are on the same circumference. An air supply passage connected to the air supply opening from the upstream side is connected to the switching mechanism in the axial direction, and an exhaust passage connected to the exhaust air opening from the downstream side is provided. The heat storage combustion burner according to (27), wherein the burner is connected to the switching mechanism in a direction perpendicular to an axial direction. (41) The heat storage combustion burner according to (27), further comprising an exhaust attraction mechanism for ejecting air toward a downstream side of the exhaust flow at a downstream side of the exhaust flow at the exhaust ventilation opening. (42) The heat storage combustion burner according to (27), wherein each of the plurality of separated heat storage bodies is accommodated in a cylindrical sleeve. (43) The respective portions of the heat storage body separated into a plurality of pieces are accommodated in a cylindrical sleeve, and the ventilation hole of the burner tile has a funnel-shaped portion expanding toward the upstream side. (27) The burner for heat storage combustion according to (27), wherein the burner is smoothly connected to the cylindrical sleeve via the funnel-shaped portion. (44) The burner according to (27), wherein the rotating disk and the fixed disk are sealed by metal surface contact, and the rotating disk is pressed against the fixed disk by a spring. (45) The heat storage combustion burner according to (27), wherein the ventilation holes provided in the rotating disk have a fan shape, and the through holes provided in the fixed disk also have a fan shape. (46) The burner for heat storage combustion according to (27), wherein the rotating disk is a disk that is reciprocally rotated. (47) The heat storage combustion burner according to (27), wherein the driving means for reciprocatingly rotating the rotating disk is an air cylinder. (48) The switching mechanism includes a rotating disk that selectively takes a first position and a second position and that is reciprocated between the first position and the second position. (27) The burner for heat storage combustion according to (27), wherein the shutter switches between the first position and the second position without forming a portion through which air supply or exhaust does not flow in a part of the plurality of divided portions. (49) There is further provided a fuel supply amount adjusting mechanism that throttles fuel when the air supply ventilation opening of the rotating disk reaches the portion between the through holes of the fixed disk and the air supply is reduced. ). (50) The heat storage combustion burner according to claim 27, wherein the exhaust ventilation opening of the rotating disk always takes a position at least a part of which is not closed by a portion between the through holes of the fixed disk. (51) The heat storage combustion burner according to (27), wherein the switching mechanism comprises a porous shutter having three or more ventilation openings. (52) Supplying air into the furnace through a ventilation hole serving as an air supply hole among a plurality of ventilation holes opened and closed in the air supply / exhaust surface, and provided in front of the air supply / exhaust surface in the air flow direction. The fuel and the air supply are mixed and burned, and the furnace exhaust gas is discharged from the plurality of vents, and the sum of the cross-sectional areas of the passages is the sum of the cross-sectional areas of the vents serving as the air supply holes. The method for burning an industrial furnace, comprising the steps of discharging to the outside of the furnace through the vent hole as described above.

[0005] The industrial furnace of (1) and (27)
In the heat storage combustion burner, the switching mechanism has a rotating disk and a fixed disk that are slidably brought into surface contact with each other, so that the rotating disk is in contact with the rotating storage and the end face of the partition wall of the heat storage body as compared with the sliding contact. A large area can be taken, so that the sealing property between the rotating disk and the fixed disk is good. Therefore, the amount of air supplied from the air supply opening to the exhaust air opening through the extremely small gap of the surface contact between the rotating disk and the fixed disk is suppressed, and the air supply is actually used for combustion. The proportion of the parts is increased and the efficiency is improved. In addition, the air supply pressure is increased due to the high sealing property, and the flow velocity of the air blown into the furnace is increased. In the industrial furnace of (2), the regenerative combustion burner of (28), and the combustion method of the industrial furnace of (52), the passage cross-sectional area of the vent serving as the exhaust vent serves as the supply vent. Since the cross-sectional area is equal to or larger than the passage cross-sectional area of the ventilation hole, the flow rate of the supply air through the ventilation hole serving as the supply air hole can be increased as compared with the conventional furnace. When the air supply flow rate becomes high, the fuel flows strongly accompanying the air supply, and the furnace exhaust gas is also entrained in the air supply and circulates strongly. When the fuel flows strongly accompanying the air supply, the short-circuit flow of the fuel to the exhaust hole is suppressed, and the incomplete combustion of the fuel and the generation of CO are suppressed. Further, when the exhaust gas in the furnace is entrained in the supply air and is strongly circulated in the furnace, the combustion is slowed down (so-called EGR effect), and the generation of NOx at high temperatures can be suppressed. In addition, the slowing of the combustion extends the combustion region long toward the back of the furnace, and averages the temperature of the combustion region. Therefore, the temperature of the entire combustion region can be increased to near the allowable temperature as compared with the conventional combustion region having a large temperature difference. As a result, the average heat flux can be increased, and high-efficiency heat transfer can be achieved (radiation heat transfer can be greatly improved). To achieve the same heat transfer, the furnace can be made more compact and space efficiency can be reduced. Improvement and reduction of initial cost can be achieved. In addition, by averaging the combustion temperature, it is possible to prevent the furnace wall from being locally heated to a high temperature, thereby increasing the life of the furnace body, reducing maintenance costs, and reducing initial costs. Furthermore, the slow combustion reduces the combustion noise. The above (3)
In the industrial furnace and the heat storage combustion burner of (29), the exhaust gas flow rate is reduced, so that the heat storage body easily takes heat of the exhaust gas (heat of the exhaust gas is easily stored in the heat storage body), and the heat recovery efficiency is improved. I do. In the industrial furnace of (4) and the heat storage combustion burner of (30), the equipment is compact because the air supply blower is directly connected to the switching mechanism. In the industrial furnace of the above (5) and the heat storage combustion burner of the above (31), the exhaust blower is directly connected to the switching mechanism, so that the equipment becomes compact, and the pressure in the furnace can be reduced because the exhaust fan is provided. In the industrial furnace of (6) and the heat storage combustion burner of (32), the air supply blower is directly connected to the switching mechanism, and the exhaust fan is directly connected to the switching mechanism. Since the exhaust fan is provided, the furnace pressure can be reduced. In the industrial furnace (7) and the heat storage combustion burner (33), the air supply blower is directly connected to the switching mechanism.
Since the exhaust fan is directly connected to the switching mechanism, and the air supply blower and exhaust fan are driven by the same driving means, equipment costs and installation space are reduced compared to the case where separate driving means are provided. Can be. In the industrial furnace of the above (8) and the heat storage combustion burner of the above (34), the heat storage is divided into a plurality of heat storages in the axial direction and the gap is provided between the heat storages. Turbulence can be generated in the gas flow, the heat transfer coefficient can be increased, and the heat transfer from the exhaust gas to the heat accumulator and from the heat accumulator to the air supply can be enhanced.

The industrial furnace according to the above (9) and the industrial furnace (35) above
In the burner for heat storage combustion described above, since the heat storage partition walls extend radially, the switching mechanism can have a rotating disk structure. In addition, since the partition wall of the switching mechanism extends in the circumferential direction, it is possible to easily cope with which one of the switching mechanisms of the apparatus, the outer circumference of which is desired to have a relatively low temperature. In the industrial furnace of (10) and the heat storage combustion burner of (36), the rotating disk rotates in one direction, so that the gas can easily flow sequentially over the entire circumferential direction of the heat storage body. Then, the portion of the heat storage body through which the supply and exhaust passes is sequentially switched in one direction.
In the industrial furnace of (11) and the heat storage combustion burner of (37), since the rotating disk is rotated by the motor, any number of rotations in one direction can be easily performed. The above (1
In the industrial furnace of 2) and the regenerative combustion burner of (38), the drive motor of the switching mechanism is installed on the low temperature side.
The drive system is installed in a low-temperature atmosphere, and failures are unlikely to occur.

The industrial furnace of (13) and the (3)
In the heat storage and combustion burner of 9), the air supply ventilation hole and the exhaust ventilation hole of the rotating disk are arranged on the same circumference, and the fixed disk through hole is arranged on the same circumference for both supply and discharge. Both the ventilation hole and the through hole can be made large, and the pressure loss of the flow at the switching mechanism can be reduced. In addition, since the through-hole provided in the fixed disk is shared for supply and discharge, the movable portion of the switching mechanism can be reduced, and the invention can be applied to a relatively large-capacity burner in which the thermal distortion of the disk is large. The above (1
In the industrial furnace of 4) and the heat storage combustion burner of (40), one of the air supply passage and the exhaust passage is connected to the switching mechanism in the axial direction, and the other is connected to the switching mechanism in the axial direction and orthogonal to the axial direction. The passage and the exhaust passage can be separated from each other, and components such as the drive mechanism can be assembled to the switching mechanism without being greatly affected by the high temperature of the exhaust gas. The above (15)
In the industrial furnace and the regenerative combustion burner of (41), an exhaust attraction mechanism is provided on the downstream side of the exhaust ventilation opening, and a special suction blower is provided by flowing excess air supply therethrough. , A fan or the like need not be provided (although it may be provided), and the equipment can be kept small. Further, by increasing or decreasing the supply air according to the combustion load, the suction force also increases or decreases in real time, so that supply / exhaust control by an inverter, a control motor or the like is not required.

The industrial furnace according to the above (16) and the industrial furnace (4)
In the heat storage combustion burner of 2), since the heat storage is accommodated in the cylindrical sleeve, the manufacture is easier and the replacement of the heat storage is easier as compared with the radial partition. In the industrial furnace of (17) and the heat storage combustion burner of (43), the heat storage body is accommodated in the cylindrical sleeve, and the ventilation hole of the cylindrical sleeve and the burner tile is provided through the funnel-shaped part. Is connected, no step is formed in the flow passage, the pressure loss of the flow can be reduced, and the directivity of air supply when exiting the vent hole can be enhanced. In the industrial furnace of the above (18) and the heat storage combustion burner of the above (44), the seal between the rotating disk and the fixed disk is a metal touch seal.
Since the O-ring is not used in the rotating part, the reliability of the seal is improved. In the industrial furnace of (19) and the burner for heat storage and combustion of (45), both the ventilation opening of the rotating disk and the through-hole of the fixed disk are fan-shaped.
The opening area can be increased, and the pressure loss of the flow can be reduced.

[0009] The industrial furnace of the above (20) and the above (4)
In the heat storage combustion burner of 6), since the rotating disk is reciprocated, the air cylinder can be used as the driving means. In the industrial furnace (21) and the regenerative combustion burner (47), switching can be performed instantaneously because the rotating disk drive means is an air cylinder. In the industrial furnace (22) and the regenerative combustion burner (48), the rotating disk is reciprocated between the first position and the second position. Since this rotation can be performed using a cylinder, the switching speed is faster than switching by one-way rotation by a motor or the like, and an instant shutter is formed. In the switching, at least one of the supply and exhaust air is always supplied to all portions of the plurality of separated heat storage units, so that a rest state does not occur in a part of the separated heat storage units. In the industrial furnace of (23) and the heat storage combustion burner of (49), when the air supply ventilation opening of the rotary disk comes to a portion between the through holes of the fixed disk, the air supply ventilation opening has a passage sectional area. Squeezed or blocked, at which time
Since the fuel supply adjustment mechanism throttles the amount of fuel, the ratio of air to fuel is kept substantially constant. In addition, even if the air supply ventilation opening is completely closed by the portion between the through holes, since the primary air is supplied from the primary air pipe, the supply of air does not stop completely, Continuous combustion is possible. In the industrial furnace of (24) and the heat storage combustion burner of (50), the exhaust ventilation opening of the switching shutter is not completely closed even if it is narrowed, so that continuous combustion is possible. It is.

The industrial furnace of (25) and (5)
In the heat storage combustion burner of 1), the supply and exhaust flow to all parts of the heat storage body almost uniformly by adopting the porous shutter.
The heat storage body is effectively used, and the heat storage body can be made substantially compact. Further, since the thermal storage is thermally uniformed, the thermal fatigue resistance of the thermal storage is also improved, and the life is extended. In the industrial furnace of the above (26), the present invention is applied to the various industrial furnaces listed.

[0011]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the figures, FIGS.
FIGS. 6, 16 and 17 show the configuration of an industrial furnace, a regenerative combustion burner and a method of burning an industrial furnace according to a first embodiment of the present invention, and FIGS. 7 and 8 show a second embodiment of the present invention. 9 to 11 show the configuration of an industrial furnace and a regenerative combustion burner according to the third embodiment of the present invention, and FIGS. FIG. 1 shows a configuration of an industrial furnace and a regenerative combustion burner according to a fourth embodiment.
4 and FIG. 15 show configurations of an industrial furnace and a heat storage combustion burner according to a fifth embodiment of the present invention. FIG. 18 shows a comparative example (conventional example). Components that are common or similar throughout all embodiments of the present invention are given the same reference numerals throughout all embodiments of the present invention.

The present invention is applicable to both the industrial furnace 100 and the burner 1 for heat storage combustion. When the present invention is applied to an industrial furnace, for example, the regenerative combustion burner has a structure that can be separated into a plurality of parts, and a part of them (for example, a burner tile described later, or a burner tile and a frame body). , Etc.) are fixed to the furnace body 5 of the industrial furnace 100 to form a member on the furnace body side or a part of the furnace body. The industrial furnace 100 to which the present invention is applied includes a melting furnace, a sintering furnace, a preheating furnace, a soaking furnace, a forging furnace, a heating furnace, an annealing furnace, a soaking furnace, a plating furnace, a drying furnace, and a refining furnace. Furnace, quenching furnace,
Tempering furnace, redox furnace, firing furnace, baking furnace, roasting furnace, melting and holding furnace, forehearth, crucible furnace, homogenizing furnace, aging furnace, reaction furnace, distillation furnace, ladle drying preheating furnace, mold firing Preheating furnace, normalizing furnace, brazing furnace, carburizing furnace, coating drying furnace, holding furnace, nitriding furnace, salt bath furnace, glass melting furnace, boiler including power generation boiler, incinerator including waste incinerator, hot water supply device, Etc. shall be included.

First, components common to all embodiments of the present invention will be described with reference to, for example, FIGS. 1 to 6, FIG. 16, and FIG. As shown in FIGS. 1 and 2, an industrial furnace 100 and a regenerative combustion burner 1 are provided with a supply air blower (for example, a blower, a compressor, or the like) via a supply passage 2.
4 is connected. The exhaust gas is exhausted through the exhaust passage 3, and an exhaust induction fan 101 (exhaust fan) is provided in the exhaust passage 3 as necessary. Desirably, the air supply blower 4 is directly connected to the burner main body (the portion of the switching mechanism 40), and when the exhaust fan 101 is provided, the exhaust fan 101 is also directly connected to the burner main body. This direct connection structure is to make the device compact. Exhaust fan 10
When 1 is provided, the air supply blower 4 and the exhaust fan 101 are driven by the same drive motor 102 to reduce the number of components and the installation space. On the other hand, the fuel from the fuel injection nozzle 20, the pilot air, and the supply air flowing through the regenerator 30 from the supply air opening 42 are sent into the furnace 100. The switching mechanism 40
The flow of the supply air and the exhaust gas to the heat storage body divided portion is performed at predetermined time intervals (for example, every several seconds to several minutes, preferably, for 6 seconds to 30 minutes).
(Every second). The supply air is, for example, about 20 ° C. on the upstream side of the heat storage body 30, is heated when passing through the heat storage body 30, and flows out of the air injection nozzle (vent) 26 as combustion air, for example, about 900 ° C. ° C
When entering the regenerator 30 as an exhaust gas flow, for example, about 1
000 ° C., and the temperature of the heat storage body is increased when passing through the heat storage body 30 to lower itself to, for example, about 200 ° C. Next, the switching mechanism 40 switches between the supply and the exhaust, and supplies the air to the place where the exhaust has been flowing, and the exhaust to the place where the supply has been flowing. Thus, the heat of the exhaust gas is stored in the heat storage body 30, and when switched to the supply air, the supply air is warmed by the stored heat.

As shown in FIGS. 1 and 2, an industrial furnace 100 and a regenerative combustion burner 1 according to an embodiment of the present invention include a regenerator 30 divided into a plurality of portions in a circumferential direction, and a shaft of the regenerator 30. A burner tile 22 having a hole which is disposed on one side in the direction and into which a fuel injection nozzle 20 is inserted, a ventilation hole 27 for switching between supply and discharge, and a supply / exhaust surface 23 where the ventilation hole 27 is opened;
And a switching mechanism 40 disposed on the other side in the 0 axial direction. The industrial furnace 100 and the heat storage combustion burner 1 may further include a frame 10 in which a fuel injection nozzle 20, a heat storage body 30, and a switching mechanism 40 are assembled.

FIG. 2 shows an enlarged example of the industrial furnace 100 and the burner 1 for regenerative combustion. The heat storage body 30 is made of a heat-resistant material such as ceramics or heat-resistant metal, and preferably has a monolith honeycomb structure in order to increase the contact area with the gas. However, the structure for increasing the contact area with the gas is not limited to the honeycomb structure, but may be, for example, a structure in which wires or small-diameter pipes are bundled. The heat storage body 30 allows gas to pass in the axial direction. The heat storage element 30 is also divided into a plurality of heat storage elements in the axial direction in order to prevent the occurrence of cracks due to the temperature gradient and to facilitate manufacture. Thermal storage 3
In the case where 0 is divided into a plurality of heat storage portions in the axial direction, spacers 32 made of a heat-resistant material are interposed between the heat storage portions at the time of assembling, and a slight distance (for example, about 3 to 5 mm) is provided between the heat storage portions. It is desirable to form the gap 33 to generate turbulence. By providing the turbulence field 33, heat transfer from the exhaust gas to the heat storage body 30 and from the heat storage body 30 to the supply air is improved. The fuel injection nozzle 20 extends in the axial direction at the center of the burner, and a primary air (pilot air) pipe 21 extends coaxially therewith. The outer peripheral surface of the fuel injection nozzle 20 and the inner peripheral surface of the primary air pipe 21 The primary air flows through the annular passage between the two. The fuel injection nozzle 20 is covered with an electrical insulating material, for example, an insulator, except for the tip, and a pilot fuel outlet 20a that discharges a part of the fuel as pilot fuel to the tip not covered with the electrical insulating material. Is provided, and the pilot fuel discharged therefrom is electrically sparked between the tip of the fuel injection nozzle not covered with the electric insulating material and the primary air pipe 21 to ignite. 3 and 4
Shows the detailed structure of the burner tile 22. The burner tile 22 is made of a refractory material and has a supply / exhaust surface 23, a protrusion 24 protruding therefrom, and a fuel release surface 25 formed inside the protrusion 24 and through which the fuel / primary air mixture flows out. I have. Desirably, the fuel release surface 25 has a flared (tapered, R-shaped, or the like) structure that expands toward the downstream side. However, the fuel release surface 25 may be formed straight up to the tip. A plurality of air holes 26 are opened in the air supply / exhaust surface 23, and the air holes 26 become air supply holes at some times due to switching of air supply and exhaust by the switching mechanism 40, and become air exhaust holes at some times. A curved portion 26R is desirably provided at an open end of the ventilation hole 26 to the air supply / exhaust surface 23 in order to smoothly flow exhaust gas into the ventilation hole 26.

An air guide groove 27 extending in the axial direction is formed on the outer peripheral surface of the projection 24. However, the air guide groove 27 is not essential. Air guide groove 27 and hole 2
Numeral 6 coincides in the axial direction, and at least a part of the supply air (secondary air, main air) flowing out through the hole 26 becomes a highly directional flow 28A through the air guide groove 27. This stream 28A includes a stream 28 of the fuel / primary air mixture.
B is entrained to form a combustion stream that reaches far away. Further, the combustion exhaust gas is entrained from the outside of the air guide groove 27, becomes oxygen-lean, and performs slow combustion, so that the generation of NO _X is small. Exhaust gas is inserted into the vent hole 26 by an arrow 28
Therefore, the fuel / primary air mixture is far from the fuel / primary air mixture flowing as indicated by the arrow 28B, and is hardly entrained, and CO due to incomplete combustion of the fuel is less contained in the exhaust gas.

The switching mechanism 40 has a rotating disk 44 and a fixed disk 46, which are slidably contacted with each other, and a partition wall 41 for air supply and exhaust. The fixed disk 46 has a through hole 47, and the ventilation openings 42, 43 are provided with the air supply ventilation openings 42 communicating with one side of the partition wall 41. The partition wall 41 includes an exhaust ventilation opening 43 communicating with the other side.

Some members of the switching mechanism 40 are movable members. For example, in the example of FIG. 5, the partition wall 41 and the rotating disk 44 are movable members. The remaining members of the switching mechanism 40 are stationary members. For example, the fixed disk 46 is a stationary member. The movable member of the switching mechanism 40 is driven in one direction or reciprocating rotation by a driving unit (for example, a motor, a cylinder, or the like) 45. Since the rotating disk 44 and the fixed disk 46 are in surface contact with each other on a plane having a large area, that is, the sliding between the plane orthogonal to the axis of the rotating disk 44 and the plane orthogonal to the axis of the fixed disk 46 is performed. Since the surfaces are in surface contact with each other, the contact area is larger than the contact between the end surface of the partition wall and the rotating disk, and the sealing property is enhanced. In order to improve the sealing performance, the rotating disk 44 is pressed against the fixed disk 46 by springs 51 and 52 (see FIGS. 9, 12 and 14). The heat storage body 30 is a stationary member. The heat storage body 30 is divided into a plurality of parts, and is separated by a partition wall 31 or housed in a sleeve 31S (FIG. 9) and separated from each other. By rotating the rotating disk 44, the supply and exhaust flow of the separated portion of the heat storage body 30 is switched.

Each of the plurality of heat storage portions is provided with a vent hole 26 of the burner tile 22 on the downstream side. Of the ventilation holes 26, the sum of the passage cross-sectional areas of the ventilation holes 26 covered by the exhaust ventilation openings 43 is the ventilation hole 2 covered by the air supply ventilation openings 42.
6 so that it is equal to or larger than the sum of the cross-sectional areas of the passages 6.
The shapes and relative positional relations of the ventilation openings 42 and 43 provided in the base 4 and the through holes 47 provided in the fixed disk 46 are set. For example, in the examples of FIGS. 5 and 6, one or two air holes 26 are covered by the air supply air opening 42, but three or more air holes 26 are covered by the exhaust air opening 43. Or two, and the supply air vent is narrowed to be equal to or more than the exhaust air vent. As a result, the air supply flow rate increases. In the above description, the number ratio between the ventilation holes 26 covered by the supply / ventilation openings 42 and the ventilation holes 26 covered by the exhaust / vent ventilation openings 43 may not be an integer ratio.

Supply and exhaust ventilation is performed so that the volume of the portion covered by the exhaust ventilation opening 43 among the plurality of separated heat storage portions is greater than the volume of the portion covered by the air supply ventilation opening 42. The number and shape of the openings 42 and 43 are set. For example, when the heat storage body 30 is divided into four by the partition wall 31, three or two are covered by the exhaust ventilation opening 43, and one is covered by the air supply ventilation opening 42. Or two. Since the exhaust flow velocity is reduced by increasing the exhaust volume, the heat storage body 3
0 easily stores heat.

The operation of the above common configuration is as follows. First, in the switching mechanism 40, since the rotating disk 44 and the fixed disk 46 are in slidable surface contact with each other on a wide plane, the contact area between the rotating disk 44 and the fixed disk 46 is increased, and the supply air is reduced. Leakage to the exhaust gas passing between the fixed disk 44 and the fixed disk 46 can be suppressed, and the flow rate of supply air to the furnace can be increased. The rotating disk 4
The degree of freedom of the air supply cover area is improved as compared with the case where the air passage 4 passes through the partition wall, and it is possible to set such that the air supply amount does not decrease at the time of switching (FIG. 8). The thickness of the heat storage chamber can be freely set, so that the design of the heat storage chamber is free.
Further, the fuel injection nozzle 20, the heat storage body 30, the switching mechanism 40
Is assembled inside the frame 10, so that the heat storage body 3
There is no need for piping to connect the zero and the switching mechanism 40, and there is no need to perform piping, and the apparatus is downsized. Further, when there is a pipe, it is necessary to purge the exhaust gas in the pipe at the time of switching, but since there is no pipe, purging is not required, and the switching time is short.

The ventilation opening 4 of the rotary disk 44
Since the shapes and positional relationships of the through holes 47 of the fixing disks 46 are set so that the cross-sectional area of the supply-air vent passage of the vent hole 27 is reduced to be equal to or less than the cross-sectional area of the exhaust vent passage. The flow rate of the air supply is improved. In addition to the increase in the sealing performance of the switching mechanism 40, the air supply flow rate becomes very large as compared with the conventional case. As shown in FIG. 16, when the flow rate of the supply air is large, the fuel flows strongly accompanying the supply air, and the exhaust gas in the furnace is entrained in the supply air and strongly circulates. When the fuel flows strongly accompanying the air supply, the short-circuit flow of the fuel to the exhaust hole is reduced, and the incomplete combustion of the fuel and the generation of CO are suppressed. Further, if the exhaust gas in the furnace is entrained in the supply air and strongly circulates in the furnace, the combustion becomes slow. As a result, the NOx generation amount decreases to about 20 ppm as shown in FIG. An industrial furnace 5 'equipped with a conventional regenerative combustion burner 1' (FIG. 1)
In 8), about 200 ppm of NOx is produced, and in a normal burner furnace, about 2000 ppm of NOx is produced.
In comparison with them, the NOx generation amount is greatly reduced. Further, due to the slow combustion, the combustion region R extends toward the back of the furnace as compared with the conventional combustion region R ', and the temperature T of the combustion region is averaged as shown in FIG. That is,
The temperature difference ΔT is smaller than the temperature difference ΔT ′ of the conventional furnace (FIG. 18). Therefore, the maximum temperature is set to the furnace wall allowable temperature Ta.
Under the following conditions, the temperature T of the combustion region R can be raised as a whole as compared with the conventional T '. As a result, it is possible to increase the average heat flux over almost the entire region of the combustion region R, enable high-efficiency heat transfer, and, when achieving the same heat transfer, make the furnace compact, improve space efficiency,
The initial cost can be reduced. In addition, by averaging the combustion zone temperature T, it is possible to prevent the furnace wall from being locally heated to a higher temperature, thereby extending the life of the furnace and reducing maintenance costs. Further, the slow combustion reduces the combustion noise.

The rotating disk 44 of the heat storage portion
Is set to be equal to or greater than the volume of the portion covered by the air supply opening 42 of the rotating disk 44, so that the flow rate of the exhaust gas passing through the heat storage 30 And the heat storage body 30 can easily recover the heat of the exhaust gas, and the heat recovery efficiency, and thus the heat efficiency of the furnace, increase.

Next, a configuration specific to each embodiment of the present invention,
The operation will be described. In the first embodiment of the present invention, the heat storage 30
The partition wall 31 that divides the heat storage body 30 radially extends as shown in FIG. 6 and divides the heat storage body 30 into a plurality (two or more, four in the embodiment of FIG. 6) in the circumferential direction. On the other hand, the partition wall 41 of the switching mechanism 40 extends in the circumferential direction, and forms the air supply passage 2 on one of the inner and outer circumferences and the exhaust passage 3 on the other. Rotating disk 4
4, an air supply ventilation opening 42 is formed in one of the inner and outer circumferences of the partition wall 41, and an exhaust ventilation opening 43 is formed in the other.
Has been opened. The air supply ventilation opening 42 is provided in the air supply passage 2.
The exhaust ventilation opening 43 is provided on the exhaust passage 3 side. As shown in FIGS. 5 and 6, the switching mechanism 40 includes a rotating disk 44 and a fixed disk 46.
It has a single disc structure. The rotating disk 44 includes
Air supply ventilation opening 4 extending in an arc shape on the outer peripheral side of partition wall 41
2 and an exhaust ventilation opening 43 extending in an arc shape on the inner peripheral side of the partition wall 41, and the fixed disk 46 is provided at a position corresponding to an intermediate portion of the partition wall 31 of the heat storage body.
Are provided with through holes 47 on the inner and outer circumferences, respectively. The rotating disk 44 is rotated only in one direction. For one-way rotation, a drive motor 45 can be used as the rotation drive means. The drive motor 45 is set on the air supply passage 2 side (the passage side with the air supply ventilation opening 42) from the partition wall 41 so as not to be affected by the heat of the exhaust gas. Also,
The heat storage body 30 is divided into four equal parts in the circumferential direction by partition walls 31. The exhaust ventilation opening 43 extends over three or two of the four divided portions of the heat storage body, and the air supply ventilation opening 42 extends over one portion. The positional relationship between the openings 42 and 43 is set so that the heat storage body divided portion covered by the exhaust ventilation opening 43 and the division covered by the air supply ventilation opening 42 do not overlap each other. . As long as the non-overlapping condition is satisfied, the number of divisions of the heat storage body 30 by the partition walls 31 may be other than four and is arbitrary.

The operation of the first embodiment will be described.
Of the rotating disk 44 because the partition wall 31 is radially extended.
By rotating, a switching structure for easily switching the supply and exhaust of each part of the heat storage body 30 is obtained. Rotating disk 4
When the rotating member 4 is rotated, the openings 42 and 43 rotate relative to the stationary through hole 47 in FIG. 6, and the region of the heat storage body 30 through which the air supply passes and the region through which the exhaust air passes sequentially shift. . As a result, the supply and exhaust are switched continuously. Further, since the partition wall 41 of the switching mechanism 40 is extended in the circumferential direction, the movable intake passage opening 42 always corresponds to the stationary intake passage 2 even when the rotating disk 44 is rotated,
The movable exhaust ventilation opening 43 can correspond to the stationary exhaust passage 3. Further, since the drive motor 45 is provided in the air supply passage 2, the influence of the heat of the exhaust gas on the drive motor 45 is suppressed.

In the second embodiment of the present invention, as shown in FIGS. 7 and 8, the through hole 47 of the fixed disk 46 is used for both supply and exhaust. The through holes 47 are arranged at equal intervals in the circumferential direction on the same circumference. The rotating disk 44 has a three-dimensional shape (three-dimensional shape) by increasing the thickness of the disk. The air supply opening 42 provided in the rotating disk 44 is open in the air supply passage 2 on one side of the partition wall 41, and the exhaust air opening 43 is provided in the exhaust passage 3 on the other side of the partition wall 41. It is open. The cover area of the exhaust ventilation opening 43 is larger than the cover area of the air supply ventilation opening 42. In addition, a sealing member 48 is interposed between the outer periphery of the rotating disk 44 and the fixed disk 46 to seal the rotating disk 44 and the fixed disk 46. An exhaust attraction mechanism 49 is provided downstream of the exhaust ventilation opening 43 on the exhaust flow side to eject an excess portion of the supply air toward the exhaust flow downstream. Further, a primary air inlet 50 is provided in a portion of the primary air pipe 21 corresponding to the inside of the rotary disk 44, and a part of the supply air is introduced into the primary air pipe 21 as primary air.

In the operation of the second embodiment, the through hole 47 of the fixed disk 46 is used for both supply and exhaust, so that the switching mechanism is compact and the area of the ventilation hole can be increased. Therefore, it can be easily applied to a large-capacity burner in which distortion or the like becomes a problem in a large-diameter disk. Since the seal member 48 is provided on the outer periphery of the rotating disk 44, it is possible to prevent air leaking from between the outer peripheral end of the rotating disk 44 and the fixed disk 46. Further, since the excess air supply is used for the exhaust attraction mechanism 49, it is not necessary to provide a special exhaust suction blower or the like, and the apparatus can be made compact and the cost can be reduced.

The third embodiment of the present invention is a further improvement of the second embodiment of the present invention as shown in FIGS. In the third embodiment of the present invention, each part of the heat storage body 30 divided into a plurality of pieces is accommodated in a cylindrical sleeve 31S. The cylindrical sleeve 31S is fixed to the end plate 10a of the frame 10. Each part of the heat storage body 30 is accommodated in a cylindrical sleeve 31S,
b and is held down by the fixed disk 46. When replacing each part of the heat storage body 30, the fixed disk 46 is removed from the end plate 10a of the frame 10, the cylindrical presser 10b is taken out, the part of the heat storage body 30 is taken out, and the new heat storage body 30 is taken out. After the insertion into the cylindrical sleeve 31S, the procedure is performed by inserting the cylindrical presser 10b and fastening the fixed disk 46 to the end plate 10a of the frame 10. The ventilation hole 26 of the burner tile 22 has a funnel-like portion 26A that expands toward the upstream side, and the ventilation hole 26 is smoothly connected to the cylindrical sleeve 31S via the funnel-like portion 26A. Since the cross section of the funnel-shaped portion 26A is circular and the cross section of the cylindrical sleeve 31S is also circular, both can be connected without forming a step. As a result, the air supply is
The directivity when leaving 6 is increased. The rotating disk 44 and the fixed disk 46 are metal touch seals,
The rotating disk 44 includes a fixed disk 46 and a spring 52.
Is pressed by the urging force. Therefore, no O-ring is provided on the rotary sliding portion. A plurality of springs 52 are provided in the circumferential direction, and press the rotating disk 44 against the fixed disk 46 with a uniform force. The rotation of the motor 45 is performed by the drive gear 45A and the driven gear 45A.
B, the sleeve 45C, and the coupling 45D are transmitted to the rotating disk 44. The spring 51 prevents the driven gear 45B from dancing. Rotating disk 4
The air supply / ventilation opening 42 and the exhaust opening 43 provided in 4 have a fan shape, and the through hole 47 provided in the fixed disk 46 also has a fan shape. The ends of the supply air ventilation opening 42 and the exhaust opening 43 on the fixed disk 46 side are provided on the same circumference. Assuming that the overlapping area between the air supply ventilation opening 42 and the through hole 47 is 1, the exhaust ventilation opening 43 and the through hole 47 are provided.
The positions and shapes of the air supply ventilation opening 42, the exhaust ventilation opening 43, and the through hole 47 are set so that the overlapping area with 2 is 3 or 3. I try to lower it. One of the air supply passage 2 connected to the air supply ventilation opening 42 and the exhaust passage 3 connected to the exhaust opening 43 is connected to the switching mechanism 40 in the axial direction,
The other is connected to the switching mechanism 40 from a direction perpendicular to the axial direction. As a result, the supply path and the exhaust path can be separated, and components such as the rotary disk drive motor 45 can be easily assembled to the switching mechanism 40.

The operation of the third embodiment will be described.
Are accommodated in the cylindrical sleeve 31S, so that the manufacture is easier and the heat storage body 30 can be easily replaced as compared with the radial partition wall 31. In addition, since the heat storage body 30 is accommodated in the cylindrical sleeve 31S and the cylindrical sleeve 31S and the ventilation holes 26 of the burner tiles 22 are connected via the funnel-shaped portion 26A, the flow passage is formed. Since no step is formed, the pressure loss of the flow can be reduced, and the directivity of the supply air flow when exiting the vent hole 26 can be enhanced.
In addition, since the seal between the rotating disk 44 and the fixed disk 46 is a metal touch seal, and the O-ring is not used in the rotating sliding portion, the reliability of the seal is improved. Further, the ventilation openings 42 and 43 of the rotary disc 44 are provided.
Since the through hole 47 of the fixed disk 46 also has a fan shape,
The opening area can be increased, and the pressure loss of the flow can be reduced.

In the fourth embodiment of the present invention, FIGS.
As shown in the figure, the switching mechanism 40 is configured to move the first position P1
Of the heat storage body 30 separated by the partition wall 31 without forming a portion through which at least one of the supply and exhaust air does not flow, without making the first position P1 and the second position P2. And a shutter for switching between. The rotating disk 44 is reciprocated. For reciprocating rotation, for example, an air cylinder can be used as the driving means 45 of the rotating disk 44. Switching by the air cylinder is performed in a short time, and is an instant shutter. Air supply ventilation opening 42
Comes to the portion between the through holes 47 of the fixed disk 46,
The air supply ventilation opening 42 is narrowed (closed). At that time, the fuel supply amount adjusting mechanism 6 provided in the pipe for sending fuel to the fuel injection nozzle 20, for example, a control valve throttles the fuel, and the fuel and air , And continuous operation with pilot fuel and primary air is possible. The heat storage body 30 is formed in a circumferential direction by partition walls 31 (31A, 31B), for example, by 2
Has been split. The thickness of the partition wall 31 is such that the partition wall 31A through which the air supply and ventilation opening 42 passes has the exhaust ventilation and ventilation opening 43.
Is larger than the partition wall 31B through which. Partition wall 31
The thickness of A (therefore, the distance between the through holes 47) is larger than the diameter of the air supply ventilation opening 42, and the thickness of the partition wall 31B (the distance between the opposite through holes 47) is the exhaust ventilation opening. 4
3 is smaller than the diameter. Therefore, at least a part of the exhaust ventilation opening 43 is not blocked by the portion between the through holes 47 (for discharging the primary combustion exhaust gas).

Regarding the operation of the fourth embodiment, the supply / exhaust ventilation openings 42, 4 which were initially on the first position P1.
3 are the partitions 31A, 31 as the rotating disk 44 rotates.
B reaches the portion between the through holes of the fixed disk 46 corresponding to B. Even if the air supply ventilation opening 42 is completely closed at the portion between the through holes of the fixed disk 46 corresponding to the partition wall 31A (even in this case, the primary air is supplied into the furnace body 5), the exhaust ventilation opening also exists. Exhaust gas flows to all the heat storage sections through the section 43, and enables continuous combustion switching without extinguishing the primary combustion. In addition, since there is no regenerator portion at rest, the entire regenerator 30 can be used most effectively, and the regenerator can be made more compact and the burner can be made smaller compared to a regenerator having a pause portion. I'm skewed.

The fifth embodiment of the present invention is different from the fourth embodiment of the present invention in that the number of the holes 42 and 43 of the ventilation opening is three or more. Have been. 14 and 15, the switching mechanism 40 includes a rotating disk 44 that is reciprocated by an air cylinder 45.
And a stationary fixed disk 46. The fixed disk 46 has, for example, a circular through hole 47 formed therein.
The rotating disk 44 is provided with, for example, a substantially square air supply opening 42 and an exhaust opening 43. The air supply ventilation openings 42 are provided on the outer peripheral side of the partition wall 41, and the number thereof is two or more for each of the left and right sides of the partition wall 31. Further, the exhaust ventilation openings 43 are on the inner peripheral side of the partition wall 41, and the number thereof is two or more for each of the right and left sides of the partition wall 31. Further, the exhaust passage is provided with an exhaust attraction mechanism 49 for causing a part of the supply air to flow to induce exhaust. Further, the rotating disk 44 is pressed against the fixed disk 46 by the spring 51, and the sealing performance is improved.

In the operation of the fifth embodiment, in FIG. 15, the position a is a state of right air supply and left exhaust, the position b is idle and the position c is a state of right exhaust and left air supply.
In the idle state, the air supply ventilation opening 42 is completely closed, but at least a part of the exhaust ventilation opening 43 can be exhausted through the through hole 47 (for discharging the primary combustion exhaust gas). The rotating disk 44 is rotated in the order of a, b, and c, and returned in the order of c, b, and a. In the fifth embodiment, since all the heat storage body divided portions are effectively used, the heat storage body 30, the industrial furnace 100, and the burner 1 are made compact. Further, compared to the fourth embodiment, the flow is more uniform in each part of the heat storage body 30 because of the porosity, and there is no local heating in heat storage and heat radiation. Thereby, the further effective use of the heat storage body 30 is achieved.

[0034]

According to the industrial furnace of the first aspect and the burner for regenerative combustion of the twenty-seventh aspect, the switching mechanism comprises a rotating disk and a fixed disk which are brought into sliding contact with each other on a wide surface. The sealing area becomes large as compared with the sliding contact between the heat storage element and the end face of the heat storage partition, and the air leak from the air supply to the exhaust can be suppressed. Therefore boost pressure is substantially increased, the supply air flow rate upstream fuel injection side, CO reduction, NO _X reduction, can be achieved extension of flame distance. Further, by suppressing the supply air leak, the ratio between the fuel and the supply air can be kept almost constant, thereby contributing to complete combustion. An industrial furnace according to claim 2,
According to the heat storage combustion burner of claim 28 and the industrial furnace combustion method of claim 52, the supply air flow rate can be improved. As a result, CO reduction, NOx reduction, flame distance extension, combustion zone temperature averaging, combustion zone temperature rise, average heat flux increase, high efficiency heat transfer, furnace downsizing, space efficiency improvement, It is possible to reduce the initial cost, avoid local high-temperature heating of the furnace wall, extend the life of the furnace, reduce maintenance costs, and reduce combustion noise. According to the industrial furnace of claim 3 and the burner for regenerative storage combustion of claim 29, the exhaust volume of the regenerator is equal to or more than the supply volume, so that the flow velocity of the exhaust gas passing through the regenerator can be reduced and the heat recovery efficiency is improved. it can. In the industrial furnace according to the fourth aspect and the burner for heat storage combustion according to the thirtieth aspect, the equipment is compact because the air supply blower is directly connected to the switching mechanism. In the industrial furnace according to the fifth aspect and the heat storage combustion burner according to the thirty-first aspect, since the exhaust suction fan is directly connected to the switching mechanism, the equipment becomes compact, and the pressure in the furnace can be reduced because the exhaust suction fan is provided. In the industrial furnace of claim 6 and the heat storage combustion burner of claim 32, the air supply blower is directly connected to the switching mechanism, and the exhaust suction fan is directly connected to the switching mechanism. Since the suction fan is provided, the pressure in the furnace can be reduced. In the industrial furnace of claim 7 and the heat storage combustion burner of claim 33, the air supply blower is directly connected to the switching mechanism, and the exhaust suction fan is directly connected to the switching mechanism, so that the air supply blower and the exhaust suction fan are connected. Are driven by the same driving means, so that equipment costs and installation space can be reduced as compared with the case where driving means are separately provided. In the industrial furnace according to claim 8 and the heat storage combustion burner according to claim 34, the heat storage body is divided into a plurality of heat storage body parts in the axial direction and the gap is provided between the heat storage parts. Turbulence can be generated in the flow, the heat transfer coefficient can be increased, and the heat transfer from the exhaust gas to the heat storage body and from the heat storage body to the air supply can be increased. According to the industrial furnace of claim 9 and the burner for regenerative combustion of claim 35, the partition wall of the switching mechanism is extended in the circumferential direction. The opening can correspond to the exhaust passage, and the exhaust passage and the exhaust ventilation opening can correspond to each other. Claim 1
According to the industrial furnace of No. 0 and the burner for thermal storage combustion of claim 36, since the rotating disk is rotated in one direction, the supply and exhaust can be sequentially switched in the circumferential direction of the thermal storage body. According to the industrial furnace of the eleventh aspect and the burner for heat storage combustion of the thirty-seventh aspect, since the rotating disk is rotated by the motor, it can be easily rotated only in one direction. According to the industrial furnace of the twelfth aspect and the burner for heat storage combustion of the thirty-eighth aspect, the drive motor is disposed closer to the air supply passage than the partition wall, so that there is no need to be affected by heat from the exhaust gas. According to the industrial furnace of the thirteenth aspect and the burner for regenerative combustion of the thirty-ninth aspect, the through-hole provided in the fixed disk is shared for supply and discharge, so that the movable portion of the switching mechanism can be made small, and the thermal distortion of the disk is reduced In addition to being applicable to a burner having a relatively large capacity, which can be large, the diameter of the through-hole can be increased, so that pressure loss at the air supply ventilation opening and the exhaust ventilation opening can be reduced. In the industrial furnace of claim 14 and the regenerative combustion burner of claim 40, one of the air supply passage and the exhaust passage is connected to the switching mechanism in the axial direction, and the other is connected to the switching mechanism in the axial direction and orthogonal. The passage and the exhaust passage can be separated from each other, and components such as the drive mechanism can be assembled to the switching mechanism without being greatly affected by the high temperature of the exhaust gas. According to the industrial furnace of claim 15 and the burner for regenerative storage combustion of claim 41, since the exhaust attraction mechanism is provided, there is no need to provide another fan, blower or the like to induce the exhaust, and the apparatus is compact as a whole. Is being measured. According to the industrial furnace of claim 16 and the burner for heat storage and combustion of claim 42, since the heat storage is housed in the cylindrical sleeve, it is easier to manufacture as compared with the radial partition wall, and the heat storage is more compact. Exchange becomes easy. According to the industrial furnace of claim 17 and the burner for regenerative combustion of claim 43, the regenerator is housed in the cylindrical sleeve, and the vent hole of the cylindrical sleeve and the burner tile is provided via the funnel. Connected, so that no step is formed in the flow passage,
The pressure loss of the flow can be reduced, and the directivity of air supply when exiting the vent hole can be enhanced.
According to the industrial furnace of claim 18 and the heat storage combustion burner of claim 44, the seal between the rotating disk and the fixed disk is a metal touch seal, and the O-ring is not used in the rotating part. Reliability is increased. According to the industrial furnace of claim 19 and the burner for regenerative combustion of claim 45, both the ventilation opening of the rotating disk and the through hole of the fixed disk are fan-shaped, so that the opening area can be increased, and Pressure loss can be reduced. According to the industrial furnace of claim 20 and the burner for regenerative combustion of claim 46, an air cylinder can be used for driving the rotating disk. According to the industrial furnace of claim 21 and the burner for regenerative combustion of claim 47, the rotating disk can be rotated instantaneously and an instant shutter can be provided. According to the industrial furnace of claim 22 and the burner for heat storage combustion of claim 48, at least one of the flow of supply and exhaust is always flowed to all of the heat storage divided parts, so that the entire heat storage is effectively used. It is possible to make the heat storage body and the burner compact. According to the industrial furnace of claim 23 and the burner for regenerative combustion of claim 49, the fuel can be throttled when the air supply ventilation opening is narrowed, so that the ratio of fuel to air can be kept almost constant. According to the industrial furnace of claim 24 and the heat storage combustion burner of claim 50, the exhaust ventilation opening is not completely closed, so that the primary combustion exhaust gas can always be discharged.
According to the industrial furnace of the twenty-fifth aspect and the burner for regenerative combustion according to the fifty-first aspect, since the multi-hole shutter is used, the flow of supply / exhaust air in the regenerator can be uniformed, and the regenerator can be effectively used. In the industrial furnace according to claim 26, the present invention can be applied to various industrial furnaces.

[Brief description of the drawings]

FIG. 1 is an overall schematic sectional view of an industrial furnace and a regenerative combustion burner according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a part of an industrial furnace and a heat storage combustion burner in FIG.

FIG. 3 is a sectional view of a tile portion in FIG. 2;

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is an enlarged sectional view of a switching mechanism and its vicinity in FIG.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is an enlarged sectional view of a part of an industrial furnace according to a second embodiment of the present invention, a switching mechanism of a heat storage combustion burner, and its vicinity.

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is an enlarged sectional view of a part of an industrial furnace, a switching mechanism of a heat storage combustion burner, and its vicinity according to a third embodiment of the present invention.

FIG. 10 is a plan view seen from the switching mechanism side of FIG. 9;

FIG. 11 is a plan view as seen from a burner tile side in FIG. 9;

FIG. 12 is an enlarged sectional view of a part of an industrial furnace, a switching mechanism of a heat storage combustion burner, and its vicinity according to a fourth embodiment of the present invention.

FIG. 13 is a plan view of FIG.

FIG. 14 is an enlarged sectional view of a part of an industrial furnace according to a fifth embodiment of the present invention, a switching mechanism of a heat storage combustion burner, and its vicinity.

FIG. 15 is a plan view of FIG.

FIG. 16 is a schematic diagram of an industrial furnace according to an embodiment of the present invention and a heat flux distribution in the furnace.

17 is a diagram showing a relationship between CO and NOx generation amounts and furnace temperature of the industrial furnace of FIG.

FIG. 18 is a schematic diagram of a conventional industrial furnace having a regenerative combustion burner and a heat flux distribution in the furnace.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 burner for heat storage combustion 2 air supply passage 3 exhaust passage 4 blowing means 5 furnace body 10 frame body 20 fuel injection nozzle 21 primary air pipe 22 burner tile 23 supply / exhaust surface 24 protrusion 25 fuel open surface 26 vent hole 26A funnel-shaped portion 27 air guide groove 30 heat storage body 31 partition wall 31S sleeve 40 switching mechanism 41 partition wall 42 air supply ventilation opening 43 exhaust ventilation ventilation opening 44 rotating disk 45 drive motor or cylinder 46 fixed disk 47 through hole 48 seal 49 exhaust induction mechanism Reference Signs List 50 primary air inlet 51 spring 52 spring 100 industrial furnace P1 first position P2 second position

[Procedure amendment]

[Submission date] July 3, 2000 (2007.3)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Burner for heat storage combustion

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying heat to a regenerator which stores heat of exhaust gas by passing exhaust gas through a regenerator, storing heat of the exhaust gas in the regenerator, and alternately switching the flow of air supply and exhaust. Seki a regenerative combustion which heat the air to be that thermal storage combustion burners run to <br/>.

[0002]

2. Description of the Related Art Japanese Patent Laying-Open No. 5-256423 discloses an alternately switching type combustion burner. There, the regenerator is integrated into the burner body, but the switching valve is installed outside the burner body and connected to the burner body by piping .

[0003]

The object of the invention is to be Solved However, the next you have problems with the conventional regenerative combustion burner. Supply / exhaust switching valve
Piping to connect both because it is separate from the burner body
Is necessary, construction is required, and the piping distribution equipment becomes large.
That there are problems. An object of the present invention, the regenerator and the switching
No piping for connecting the replacement mechanism is required, and the device can be downsized.
To provide a burner for heat storage combustion.

[0004]

The present invention to achieve the above object is as follows. (1 ) The fuel injection nozzle, heat storage, and switching mechanism are assembled in a frame
And the frame is within the furnace wall thickness direction.
A burner for heat storage combustion, wherein the burner is arranged in a burner. (2 ) A plurality of passages and a heat storage element stored in the passages
Which is partially fixed inside the furnace of the industrial furnace and
A heat storage combustion burner that forms part of the material or furnace body.
The plurality of passages and heat stored in the passages.
The bodies are separated from one another within the thickness direction of the furnace wall of the furnace body
A burner for regenerative combustion characterized by being arranged in a vertical position. (3 ) The plurality of passages are mutually connected around a fuel injection axis.
(2) The heat storage according to (2), which is arranged separately.
Burner for combustion. (4 ) The plurality of passages extend in a thickness direction of the furnace wall of the furnace body.
Characterized by a plurality of sleeves arranged in the enclosure
The burner for heat storage combustion according to (2) or (3).

[0005] The bar for heat storage combustion of the above (1) or (2)
The fuel injection nozzle, heat storage, and switching mechanism are inside the frame
Is connected to the heat storage unit and the switching mechanism.
This eliminates the need for piping, which eliminates the need for
Type can be realized. Thermal storage combustion of (3) or (4) above
Burners use multiple vents for each part of the heat storage
Because it is stored in the road, production is easy and
In addition, replacement of the heat storage body is also facilitated.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the figures, FIGS.
FIGS. 6, 16 and 17 show the configuration of an industrial furnace, a regenerative combustion burner and a method of burning an industrial furnace according to a first embodiment of the present invention, and FIGS. 7 and 8 show a second embodiment of the present invention. 9 to 11 show the configuration of an industrial furnace and a regenerative combustion burner according to the third embodiment of the present invention, and FIGS. FIG. 1 shows a configuration of an industrial furnace and a regenerative combustion burner according to a fourth embodiment.
4 and FIG. 15 show configurations of an industrial furnace and a heat storage combustion burner according to a fifth embodiment of the present invention. FIG. 18 shows a comparative example (conventional example). Components that are common or similar throughout all embodiments of the present invention are given the same reference numerals throughout all embodiments of the present invention.

The present invention is applicable to both the industrial furnace 100 and the burner 1 for heat storage combustion. When the present invention is applied to an industrial furnace, for example, the regenerative combustion burner has a structure that can be separated into a plurality of parts, and a part of them (for example, a burner tile described later, or a burner tile and a frame body). , Etc.) are fixed to the furnace body 5 of the industrial furnace 100 to form a member on the furnace body side or a part of the furnace body. The industrial furnace 100 to which the present invention is applied includes a melting furnace, a sintering furnace, a preheating furnace, a soaking furnace, a forging furnace, a heating furnace, an annealing furnace, a soaking furnace, a plating furnace, a drying furnace, and a refining furnace. Furnace, quenching furnace,
Tempering furnace, redox furnace, firing furnace, baking furnace, roasting furnace, melting and holding furnace, forehearth, crucible furnace, homogenizing furnace, aging furnace, reaction furnace, distillation furnace, ladle drying preheating furnace, mold firing Preheating furnace, normalizing furnace, brazing furnace, carburizing furnace, coating drying furnace, holding furnace, nitriding furnace, salt bath furnace, glass melting furnace, boiler including power generation boiler, incinerator including waste incinerator, hot water supply device, Etc. shall be included.

[0008] First, the common components throughout all of the embodiments of the present invention, for example, Figures 1-6, Figure 16, with reference to FIG. 17 will be described. As shown in FIGS. 1 and 2, an industrial furnace 100 and a regenerative combustion burner 1 are provided with a supply air blower (for example, a blower, a compressor, or the like) via a supply passage 2.
4 is connected. The exhaust gas is exhausted through the exhaust passage 3, and an exhaust induction fan 101 (exhaust fan) is provided in the exhaust passage 3 as necessary. Desirably, the air supply blower 4 is directly connected to the burner main body (the portion of the switching mechanism 40), and when the exhaust fan 101 is provided, the exhaust fan 101 is also directly connected to the burner main body. This direct connection structure is to make the device compact. Exhaust fan 10
When 1 is provided, the air supply blower 4 and the exhaust fan 101 are driven by the same drive motor 102 to reduce the number of components and the installation space. On the other hand, the fuel from the fuel injection nozzle 20, the pilot air, and the supply air flowing through the regenerator 30 from the supply air opening 42 are sent into the furnace 100. The switching mechanism 40
The flow of the supply air and the exhaust gas to the heat storage body divided portion is performed at predetermined time intervals (for example, every several seconds to several minutes, preferably, for 6 seconds to 30 minutes).
(Every second). The supply air is, for example, about 20 ° C. on the upstream side of the heat storage body 30, is heated when passing through the heat storage body 30, and flows out of the air injection nozzle (vent) 26 as combustion air, for example, about 900 ° C. ° C
When entering the regenerator 30 as an exhaust gas flow, for example, about 1
000 ° C., and the temperature of the heat storage body is increased when passing through the heat storage body 30 to lower itself to, for example, about 200 ° C. Next, the switching mechanism 40 switches between the supply and the exhaust, and supplies the air to the place where the exhaust has been flowing, and the exhaust to the place where the supply has been flowing. Thus, the heat of the exhaust gas is stored in the heat storage body 30, and when switched to the supply air, the supply air is warmed by the stored heat.

As shown in FIGS. 1 and 2, an industrial furnace 100 and a regenerative combustion burner 1 according to an embodiment of the present invention include a regenerator 30 divided into a plurality of portions in a circumferential direction, and a shaft of the regenerator 30. A burner tile 22 having a hole which is disposed on one side in the direction and into which a fuel injection nozzle 20 is inserted, a ventilation hole 27 for switching between supply and discharge, and a supply / exhaust surface 23 where the ventilation hole 27 is opened;
And a switching mechanism 40 disposed on the other side in the 0 axial direction. The industrial furnace 100 and the heat storage combustion burner 1 may further include a frame 10 in which a fuel injection nozzle 20, a heat storage body 30, and a switching mechanism 40 are assembled.

FIG . 2 shows an enlarged example of the industrial furnace 100 and the burner 1 for regenerative combustion. The heat storage body 30 is made of a heat-resistant material such as ceramics or heat-resistant metal, and preferably has a monolith honeycomb structure in order to increase the contact area with the gas. However, the structure for increasing the contact area with the gas is not limited to the honeycomb structure, but may be, for example, a structure in which wires or small-diameter pipes are bundled. The heat storage body 30 allows gas to pass in the axial direction. The heat storage element 30 is also divided into a plurality of heat storage elements in the axial direction in order to prevent the occurrence of cracks due to the temperature gradient and to facilitate manufacture. Thermal storage 3
In the case where 0 is divided into a plurality of heat storage portions in the axial direction, spacers 32 made of a heat-resistant material are interposed between the heat storage portions at the time of assembling, and a slight distance (for example, about 3 to 5 mm) is provided between the heat storage portions. It is desirable to form the gap 33 to generate turbulence. By providing the turbulence field 33, heat transfer from the exhaust gas to the heat storage body 30 and from the heat storage body 30 to the supply air is improved. The fuel injection nozzle 20 extends in the axial direction at the center of the burner, and a primary air (pilot air) pipe 21 extends coaxially therewith. The outer peripheral surface of the fuel injection nozzle 20 and the inner peripheral surface of the primary air pipe 21 The primary air flows through the annular passage between the two. The fuel injection nozzle 20 is covered with an electrical insulating material, for example, an insulator, except for the tip, and a pilot fuel outlet 20a that discharges a part of the fuel as pilot fuel to the tip not covered with the electrical insulating material. Is provided, and the pilot fuel discharged therefrom is electrically sparked between the tip of the fuel injection nozzle not covered with the electric insulating material and the primary air pipe 21 to ignite. 3 and 4
Shows the detailed structure of the burner tile 22. The burner tile 22 is made of a refractory material and has a supply / exhaust surface 23, a protrusion 24 protruding therefrom, and a fuel release surface 25 formed inside the protrusion 24 and through which the fuel / primary air mixture flows out. I have. Desirably, the fuel release surface 25 has a flared (tapered, R-shaped, or the like) structure that expands toward the downstream side. However, the fuel release surface 25 may be formed straight up to the tip. A plurality of air holes 26 are opened in the air supply / exhaust surface 23, and the air holes 26 become air supply holes at some times due to switching of air supply and exhaust by the switching mechanism 40, and become air exhaust holes at some times. A curved portion 26R is desirably provided at an open end of the ventilation hole 26 to the air supply / exhaust surface 23 in order to smoothly flow exhaust gas into the ventilation hole 26.

An air guide groove 27 extending in the axial direction is formed on the outer peripheral surface of the projection 24. However, the air guide groove 27 is not essential. Air guide groove 27 and hole 2
Numeral 6 coincides in the axial direction, and at least a part of the supply air (secondary air, main air) flowing out through the hole 26 becomes a highly directional flow 28A through the air guide groove 27. This stream 28A includes a stream 28 of the fuel / primary air mixture.
B is entrained to form a combustion stream that reaches far away. Further, the combustion exhaust gas is entrained from the outside of the air guide groove 27, becomes oxygen-lean, and performs slow combustion, so that the generation of NO _X is small. Exhaust gas is inserted into the vent hole 26 by an arrow 28
Therefore, the fuel / primary air mixture is far from the fuel / primary air mixture flowing as indicated by the arrow 28B, and is hardly entrained, and CO due to incomplete combustion of the fuel is less contained in the exhaust gas.

The switching mechanism 40 has a rotating disk 44 and a fixed disk 46, which are slidably contacted with each other, and a supply / exhaust partition wall 41. The rotating disk 44 communicates and is cut off by the rotation of the rotating disk 44. The fixed disk 46 has a through hole 47, and the ventilation openings 42, 43 are provided with the air supply ventilation openings 42 communicating with one side of the partition wall 41. It includes an exhaust ventilation opening 43 communicating with the other side of the partition wall 41.

[0013] Some of the members of the switching mechanism 40 is a movable member. For example, in the example of FIG. 5, the partition wall 41 and the rotating disk 44 are movable members. The remaining members of the switching mechanism 40 are stationary members. For example, the fixed disk 46 is a stationary member. The movable member of the switching mechanism 40 is driven in one direction or reciprocating rotation by a driving unit (for example, a motor, a cylinder, or the like) 45. Since the rotating disk 44 and the fixed disk 46 are in surface contact with each other on a plane having a large area, that is, the sliding between the plane orthogonal to the axis of the rotating disk 44 and the plane orthogonal to the axis of the fixed disk 46 is performed. Since the surfaces are in surface contact with each other, the contact area is larger than the contact between the end surface of the partition wall and the rotating disk, and the sealing property is enhanced. In order to improve the sealing performance, the rotating disk 44 is pressed against the fixed disk 46 by springs 51 and 52 (see FIGS. 9, 12 and 14). The heat storage body 30 is a stationary member. The heat storage body 30 is divided into a plurality of parts, and is separated by a partition wall 31 or housed in a sleeve 31S (FIG. 9) and separated from each other. By rotating the rotating disk 44, the supply and exhaust flow of the separated portion of the heat storage body 30 is switched.

[0014] The plurality of separated regenerator section, for each, the vent hole 26 of the burner tile 22 is provided on the downstream side. Of the ventilation holes 26, the sum of the passage cross-sectional areas of the ventilation holes 26 covered by the exhaust ventilation openings 43 is the ventilation hole 2 covered by the air supply ventilation openings 42.
6 so that it is equal to or larger than the sum of the cross-sectional areas of the passages 6.
The shapes and relative positional relations of the ventilation openings 42 and 43 provided in the base 4 and the through holes 47 provided in the fixed disk 46 are set. For example, in the examples of FIGS. 5 and 6, one or two air holes 26 are covered by the air supply air opening 42, but three or more air holes 26 are covered by the exhaust air opening 43. Or two, and the supply air vent is narrowed to be equal to or more than the exhaust air vent. As a result, the air supply flow rate increases. In the above description, the number ratio between the ventilation holes 26 covered by the supply / ventilation openings 42 and the ventilation holes 26 covered by the exhaust / vent ventilation openings 43 may not be an integer ratio.

[0015] plurality volume of the portion covered by the exhaust ventilation openings 43 of the separated regenerator portion sheet so that the above volume of the portion covered by the openings 42 for air supply vent, the exhaust vent The number and shape of the openings 42 and 43 are set. For example, when the heat storage body 30 is divided into four by the partition wall 31, three or two are covered by the exhaust ventilation opening 43, and one is covered by the air supply ventilation opening 42. Or two. Since the exhaust flow velocity is reduced by increasing the exhaust volume, the heat storage body 3
0 easily stores heat.

The operation of the above common configuration is as follows. First, in the switching mechanism 40, since the rotating disk 44 and the fixed disk 46 are in slidable surface contact with each other on a wide plane, the contact area between the rotating disk 44 and the fixed disk 46 is increased, and the supply air is reduced. Leakage to the exhaust gas passing between the fixed disk 44 and the fixed disk 46 can be suppressed, and the flow rate of supply air to the furnace can be increased. The rotating disk 4
The degree of freedom of the air supply cover area is improved as compared with the case where the air passage 4 passes through the partition wall, and it is possible to set such that the air supply amount does not decrease at the time of switching (FIG. 8). The thickness of the heat storage chamber can be freely set, so that the design of the heat storage chamber is free.
Further, the fuel injection nozzle 20, the heat storage body 30, the switching mechanism 40
Is assembled inside the frame 10, so that the heat storage body 3
There is no need for piping to connect the zero and the switching mechanism 40, and there is no need to perform piping, and the apparatus is downsized. Further, when there is a pipe, it is necessary to purge the exhaust gas in the pipe at the time of switching, but since there is no pipe, purging is not required, and the switching time is short.

Further, the ventilation opening 4 of the rotary disc 44
Since the shapes and positional relationships of the through holes 47 of the fixing disks 46 are set so that the cross-sectional area of the supply-air vent passage of the vent hole 27 is reduced to be equal to or less than the cross-sectional area of the exhaust vent passage. The flow rate of the air supply is improved. In addition to the increase in the sealing performance of the switching mechanism 40, the air supply flow rate becomes very large as compared with the conventional case. As shown in FIG. 16, when the flow rate of the supply air is large, the fuel flows strongly accompanying the supply air, and the exhaust gas in the furnace is entrained in the supply air and strongly circulates. When the fuel flows strongly accompanying the air supply, the short-circuit flow of the fuel to the exhaust hole is reduced, and the incomplete combustion of the fuel and the generation of CO are suppressed. Further, if the exhaust gas in the furnace is entrained in the supply air and strongly circulates in the furnace, the combustion becomes slow. As a result, the NOx generation amount decreases to about 20 ppm as shown in FIG. An industrial furnace 5 'equipped with a conventional regenerative combustion burner 1' (FIG. 1)
In 8), about 200 ppm of NOx is produced, and in a normal burner furnace, about 2000 ppm of NOx is produced.
In comparison with them, the NOx generation amount is greatly reduced. Further, due to the slow combustion, the combustion region R extends toward the back of the furnace as compared with the conventional combustion region R ', and the temperature T of the combustion region is averaged as shown in FIG. That is,
The temperature difference ΔT is smaller than the temperature difference ΔT ′ of the conventional furnace (FIG. 18). Therefore, the maximum temperature is set to the furnace wall allowable temperature Ta.
Under the following conditions, the temperature T of the combustion region R can be raised as a whole as compared with the conventional T '. As a result, it is possible to increase the average heat flux over almost the entire region of the combustion region R, enable high-efficiency heat transfer, and, when achieving the same heat transfer, make the furnace compact, improve space efficiency,
The initial cost can be reduced. In addition, by averaging the combustion zone temperature T, it is possible to prevent the furnace wall from being locally heated to a higher temperature, thereby extending the life of the furnace and reducing maintenance costs. Further, the slow combustion reduces the combustion noise.

The rotating disk 44 of the heat storage portion
Is set to be equal to or greater than the volume of the portion covered by the air supply opening 42 of the rotating disk 44, so that the flow rate of the exhaust gas passing through the heat storage 30 And the heat storage body 30 can easily recover the heat of the exhaust gas, and the heat recovery efficiency, and thus the heat efficiency of the furnace, increase.

Next, unique to each embodiment of the present invention structure,
The operation will be described. In the first embodiment of the present invention, the heat storage 30
The partition wall 31 that divides the heat storage body 30 radially extends as shown in FIG. 6 and divides the heat storage body 30 into a plurality (two or more, four in the embodiment of FIG. 6) in the circumferential direction. On the other hand, the partition wall 41 of the switching mechanism 40 extends in the circumferential direction, and forms the air supply passage 2 on one of the inner and outer circumferences and the exhaust passage 3 on the other. Rotating disk 4
4, an air supply ventilation opening 42 is formed in one of the inner and outer circumferences of the partition wall 41, and an exhaust ventilation opening 43 is formed in the other.
Has been opened. The air supply ventilation opening 42 is provided in the air supply passage 2.
The exhaust ventilation opening 43 is provided on the exhaust passage 3 side. As shown in FIGS. 5 and 6, the switching mechanism 40 includes a rotating disk 44 and a fixed disk 46.
It has a single disc structure. The rotating disk 44 includes
Air supply ventilation opening 4 extending in an arc shape on the outer peripheral side of partition wall 41
2 and an exhaust ventilation opening 43 extending in an arc shape on the inner peripheral side of the partition wall 41, and the fixed disk 46 is provided at a position corresponding to an intermediate portion of the partition wall 31 of the heat storage body.
Are provided with through holes 47 on the inner and outer circumferences, respectively. The rotating disk 44 is rotated only in one direction. For one-way rotation, a drive motor 45 can be used as the rotation drive means. The drive motor 45 is set on the air supply passage 2 side (the passage side with the air supply ventilation opening 42) from the partition wall 41 so as not to be affected by the heat of the exhaust gas. Also,
The heat storage body 30 is divided into four equal parts in the circumferential direction by partition walls 31. The exhaust ventilation opening 43 extends over three or two of the four divided portions of the heat storage body, and the air supply ventilation opening 42 extends over one portion. The positional relationship between the openings 42 and 43 is set so that the heat storage body divided portion covered by the exhaust ventilation opening 43 and the division covered by the air supply ventilation opening 42 do not overlap each other. . As long as the non-overlapping condition is satisfied, the number of divisions of the heat storage body 30 by the partition walls 31 may be other than four and is arbitrary.

[0020] For the operation of the first embodiment, the regenerator 30
Of the rotating disk 44 because the partition wall 31 is radially extended.
By rotating, a switching structure for easily switching the supply and exhaust of each part of the heat storage body 30 is obtained. Rotating disk 4
When the rotating member 4 is rotated, the openings 42 and 43 rotate relative to the stationary through hole 47 in FIG. 6, and the region of the heat storage body 30 through which the air supply passes and the region through which the exhaust air passes sequentially shift. . As a result, the supply and exhaust are switched continuously. Further, since the partition wall 41 of the switching mechanism 40 is extended in the circumferential direction, the movable intake passage opening 42 always corresponds to the stationary intake passage 2 even when the rotating disk 44 is rotated,
The movable exhaust ventilation opening 43 can correspond to the stationary exhaust passage 3. Further, since the drive motor 45 is provided in the air supply passage 2, the influence of the heat of the exhaust gas on the drive motor 45 is suppressed.

In the second embodiment of the present invention, as shown in FIGS. 7 and 8, the through hole 47 of the fixed disk 46 is used for both supply and exhaust. The through holes 47 are arranged at equal intervals in the circumferential direction on the same circumference. The rotating disk 44 has a three-dimensional shape (three-dimensional shape) by increasing the thickness of the disk. The air supply opening 42 provided in the rotating disk 44 is open in the air supply passage 2 on one side of the partition wall 41, and the exhaust air opening 43 is provided in the exhaust passage 3 on the other side of the partition wall 41. It is open. The cover area of the exhaust ventilation opening 43 is larger than the cover area of the air supply ventilation opening 42. In addition, a sealing member 48 is interposed between the outer periphery of the rotating disk 44 and the fixed disk 46 to seal the rotating disk 44 and the fixed disk 46. An exhaust attraction mechanism 49 is provided downstream of the exhaust ventilation opening 43 on the exhaust flow side to eject an excess portion of the supply air toward the exhaust flow downstream. Further, a primary air inlet 50 is provided in a portion of the primary air pipe 21 corresponding to the inside of the rotary disk 44, and a part of the supply air is introduced into the primary air pipe 21 as primary air.

In the operation of the second embodiment, since the through hole 47 of the fixed disk 46 is used for both supply and exhaust, the switching mechanism is compact and the area of the ventilation hole can be increased. Therefore, it can be easily applied to a large-capacity burner in which distortion or the like becomes a problem in a large-diameter disk. Since the seal member 48 is provided on the outer periphery of the rotating disk 44, it is possible to prevent air leaking from between the outer peripheral end of the rotating disk 44 and the fixed disk 46. Further, since the excess air supply is used for the exhaust attraction mechanism 49, it is not necessary to provide a special exhaust suction blower or the like, and the apparatus can be made compact and the cost can be reduced.

Third embodiment of the [0023] present invention, as shown in FIGS. 9 to 11 is obtained by further improving the second embodiment of the present invention. In the third embodiment of the present invention, each part of the heat storage body 30 divided into a plurality of pieces is accommodated in a cylindrical sleeve 31S. The cylindrical sleeve 31S is fixed to the end plate 10a of the frame 10. Each part of the heat storage body 30 is accommodated in a cylindrical sleeve 31S,
b and is held down by the fixed disk 46. When replacing each part of the heat storage body 30, the fixed disk 46 is removed from the end plate 10a of the frame 10, the cylindrical presser 10b is taken out, the part of the heat storage body 30 is taken out, and the new heat storage body 30 is taken out. After the insertion into the cylindrical sleeve 31S, the procedure is performed by inserting the cylindrical presser 10b and fastening the fixed disk 46 to the end plate 10a of the frame 10. The ventilation hole 26 of the burner tile 22 has a funnel-like portion 26A that expands toward the upstream side, and the ventilation hole 26 is smoothly connected to the cylindrical sleeve 31S via the funnel-like portion 26A. Since the cross section of the funnel-shaped portion 26A is circular and the cross section of the cylindrical sleeve 31S is also circular, both can be connected without forming a step. As a result, the air supply is
The directivity when leaving 6 is increased. The rotating disk 44 and the fixed disk 46 are metal touch seals,
The rotating disk 44 includes a fixed disk 46 and a spring 52.
Is pressed by the urging force. Therefore, no O-ring is provided on the rotary sliding portion. A plurality of springs 52 are provided in the circumferential direction, and press the rotating disk 44 against the fixed disk 46 with a uniform force. The rotation of the motor 45 is performed by the drive gear 45A and the driven gear 45A.
B, the sleeve 45C, and the coupling 45D are transmitted to the rotating disk 44. The spring 51 prevents the driven gear 45B from dancing. Rotating disk 4
The air supply / ventilation opening 42 and the exhaust opening 43 provided in 4 have a fan shape, and the through hole 47 provided in the fixed disk 46 also has a fan shape. The ends of the supply air ventilation opening 42 and the exhaust opening 43 on the fixed disk 46 side are provided on the same circumference. Assuming that the overlapping area between the air supply ventilation opening 42 and the through hole 47 is 1, the exhaust ventilation opening 43 and the through hole 47 are provided.
The positions and shapes of the air supply ventilation opening 42, the exhaust ventilation opening 43, and the through hole 47 are set so that the overlapping area with 2 is 3 or 3. I try to lower it. One of the air supply passage 2 connected to the air supply ventilation opening 42 and the exhaust passage 3 connected to the exhaust opening 43 is connected to the switching mechanism 40 in the axial direction,
The other is connected to the switching mechanism 40 from a direction perpendicular to the axial direction. As a result, the supply path and the exhaust path can be separated, and components such as the rotary disk drive motor 45 can be easily assembled to the switching mechanism 40.

[0024] For the operation of the third embodiment, the regenerator 30
Are accommodated in the cylindrical sleeve 31S, so that the manufacture is easier and the heat storage body 30 can be easily replaced as compared with the radial partition wall 31. In addition, since the heat storage body 30 is accommodated in the cylindrical sleeve 31S and the cylindrical sleeve 31S and the ventilation holes 26 of the burner tiles 22 are connected via the funnel-shaped portion 26A, the flow passage is formed. Since no step is formed, the pressure loss of the flow can be reduced, and the directivity of the supply air flow when exiting the vent hole 26 can be enhanced.
In addition, since the seal between the rotating disk 44 and the fixed disk 46 is a metal touch seal, and the O-ring is not used in the rotating sliding portion, the reliability of the seal is improved. Further, the ventilation openings 42 and 43 of the rotary disc 44 are provided.
Since the through hole 47 of the fixed disk 46 also has a fan shape,
The opening area can be increased, and the pressure loss of the flow can be reduced.

In the fourth embodiment of the present invention, FIGS.
As shown in the figure, the switching mechanism 40 is configured to move the first position P1
Of the heat storage body 30 separated by the partition wall 31 without forming a portion through which at least one of the supply and exhaust air does not flow, without making the first position P1 and the second position P2. And a shutter for switching between. The rotating disk 44 is reciprocated. For reciprocating rotation, for example, an air cylinder can be used as the driving means 45 of the rotating disk 44. Switching by the air cylinder is performed in a short time, and is an instant shutter. Air supply ventilation opening 42
Comes to the portion between the through holes 47 of the fixed disk 46,
The air supply ventilation opening 42 is narrowed (closed). At that time, the fuel supply amount adjusting mechanism 6 provided in the pipe for sending fuel to the fuel injection nozzle 20, for example, a control valve throttles the fuel, and the fuel and air , And continuous operation with pilot fuel and primary air is possible. The heat storage body 30 is formed in a circumferential direction by partition walls 31 (31A, 31B), for example, by 2
Has been split. The thickness of the partition wall 31 is such that the partition wall 31A through which the air supply and ventilation opening 42 passes has the exhaust ventilation and ventilation opening 43.
Is larger than the partition wall 31B through which. Partition wall 31
The thickness of A (therefore, the distance between the through holes 47) is larger than the diameter of the air supply ventilation opening 42, and the thickness of the partition wall 31B (the distance between the opposite through holes 47) is the exhaust ventilation opening. 4
3 is smaller than the diameter. Therefore, at least a part of the exhaust ventilation opening 43 is not blocked by the portion between the through holes 47 (for discharging the primary combustion exhaust gas).

[0026] For the operation of the fourth embodiment, initially supply, exhaust ventilation openings which was on the first position P1 42,4
3 are the partitions 31A, 31 as the rotating disk 44 rotates.
B reaches the portion between the through holes of the fixed disk 46 corresponding to B. Even if the air supply ventilation opening 42 is completely closed at the portion between the through holes of the fixed disk 46 corresponding to the partition wall 31A (even in this case, the primary air is supplied into the furnace body 5), the exhaust ventilation opening also exists. Exhaust gas flows to all the heat storage sections through the section 43, and enables continuous combustion switching without extinguishing the primary combustion. In addition, since there is no regenerator portion at rest, the entire regenerator 30 can be used most effectively, and the regenerator can be made more compact and the burner can be made smaller compared to a regenerator having a pause portion. I'm skewed.

Fifth embodiment of the [0027] present invention, a fourth embodiment of the present invention is obtained by a number of 3 or more porous shutter ducting aperture holes 42 and 43, shown in Figure 14, Figure 15 Have been. 14 and 15, the switching mechanism 40 includes a rotating disk 44 that is reciprocated by an air cylinder 45.
And a stationary fixed disk 46. The fixed disk 46 has, for example, a circular through hole 47 formed therein.
The rotating disk 44 is provided with, for example, a substantially square air supply opening 42 and an exhaust opening 43. The air supply ventilation openings 42 are provided on the outer peripheral side of the partition wall 41, and the number thereof is two or more for each of the left and right sides of the partition wall 31. Further, the exhaust ventilation openings 43 are on the inner peripheral side of the partition wall 41, and the number thereof is two or more for each of the right and left sides of the partition wall 31. Further, the exhaust passage is provided with an exhaust attraction mechanism 49 for causing a part of the supply air to flow to induce exhaust. Further, the rotating disk 44 is pressed against the fixed disk 46 by the spring 51, and the sealing performance is improved.

[0028] The operation of the fifth embodiment, in FIG. 15, a state of a position right air supply left exhaust, in position b is idle, c position is the state of the right exhaust left air supply.
In the idle state, the air supply ventilation opening 42 is completely closed, but at least a part of the exhaust ventilation opening 43 can be exhausted through the through hole 47 (for discharging the primary combustion exhaust gas). The rotating disk 44 is rotated in the order of a, b, and c, and returned in the order of c, b, and a. In the fifth embodiment, since all the heat storage body divided portions are effectively used, the heat storage body 30, the industrial furnace 100, and the burner 1 are made compact. Further, compared to the fourth embodiment, the flow is more uniform in each part of the heat storage body 30 because of the porosity, and there is no local heating in heat storage and heat radiation. Thereby, the further effective use of the heat storage body 30 is achieved.

[0029]

The heat storage combustion according to claim 1 or 2
Fuel burner, heat storage, switching mechanism
Is installed inside the frame, so the heat storage
Piping to connect the structure is not required, and piping is not required
Thus, the size of the apparatus can be reduced. Claim 3 or Claim
According to the heat storage combustion burner described in 4, each of the heat storage bodies
Part is stored in multiple ventilation paths,
The production becomes easy, and the exchange of the heat storage body becomes easy.

[Brief description of the drawings]

FIG. 1 is an overall schematic sectional view of an industrial furnace and a regenerative combustion burner according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a part of an industrial furnace and a heat storage combustion burner in FIG.

FIG. 3 is a sectional view of a tile portion in FIG. 2;

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is an enlarged sectional view of a switching mechanism and its vicinity in FIG.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is an enlarged sectional view of a part of an industrial furnace according to a second embodiment of the present invention, a switching mechanism of a heat storage combustion burner, and its vicinity.

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is an enlarged sectional view of a part of an industrial furnace, a switching mechanism of a heat storage combustion burner, and its vicinity according to a third embodiment of the present invention.

FIG. 10 is a plan view seen from the switching mechanism side of FIG. 9;

FIG. 11 is a plan view as seen from a burner tile side in FIG. 9;

FIG. 12 is an enlarged sectional view of a part of an industrial furnace, a switching mechanism of a heat storage combustion burner, and its vicinity according to a fourth embodiment of the present invention.

FIG. 13 is a plan view of FIG.

FIG. 14 is an enlarged sectional view of a part of an industrial furnace according to a fifth embodiment of the present invention, a switching mechanism of a heat storage combustion burner, and its vicinity.

FIG. 15 is a plan view of FIG.

FIG. 16 is a schematic diagram of an industrial furnace according to an embodiment of the present invention and a heat flux distribution in the furnace.

17 is a diagram showing a relationship between CO and NOx generation amounts and furnace temperature of the industrial furnace of FIG.

FIG. 18 is a schematic diagram of a conventional industrial furnace having a regenerative combustion burner and a heat flux distribution in the furnace.

[Description of Signs] 1 Burner for heat storage and combustion 2 Air supply passage 3 Exhaust passage 4 Blowing means 5 Furnace body 10 Frame body 20 Fuel injection nozzle 21 Primary air pipe 22 Burner tile 23 Supply / exhaust surface 24 Projecting portion 25 Fuel release surface 26 Communication Pores 26A Funnel-shaped part 27 Air guide groove 30 Heat storage body 31 Partition wall 31S Sleeve 40 Switching mechanism 41 Partition wall 42 Air supply ventilation opening 43 Exhaust ventilation opening 44 Rotating disk 45 Drive motor or cylinder 46 Fixed disk 47 Through hole 48 Seal 49 Exhaust air induction mechanism 50 Primary air inlet 51 Spring 52 Spring 100 Industrial furnace P1 First position P2 Second position

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomohiko Nishiyama 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Co., Ltd. (72) Ryoichi Tanaka 2-1-153 Shirite, Tsurumi-ku, Yokohama-shi, Kanagawa Japan Furnace Industrial Co., Ltd.

Claims (52)

[Claims] 1. A heat storage body separated into a plurality of portions, a hole arranged on one side in the axial direction of the heat storage body, into which a fuel injection nozzle is inserted, and a plurality of ventilation holes for switching between supply and discharge.
A burner tile having a supply / exhaust surface in which the ventilation hole is opened; and a rotating disk and a fixed disk disposed on the other axial side of the heat storage body and slidably in surface contact with each other. An exhaust partition wall, the fixed disk has a plurality of through holes, the rotating disk has a plurality of ventilation openings that are communicated and blocked by rotation of the rotation disk, and the ventilation openings A switching mechanism including an air supply ventilation opening communicating with one side of the partition wall and an exhaust ventilation opening communicating with the other side of the partition wall, wherein the heat storage element and the burner An industrial furnace, wherein the tile and the switching mechanism are separable from each other, and at least one of the heat storage body, the burner tile, and the switching mechanism is fixed to the furnace body to form a part of the furnace body. 2. A passage covered by the air supply passage opening, the sum of the passage cross-sectional areas of the ventilation holes covered by the exhaust ventilation opening among the plurality of ventilation holes provided in the burner tile. The shape and relative positional relationship between the ventilation opening provided in the rotating disk and the through hole provided in the fixing disk are set so as to be equal to or greater than the cross-sectional area of the passage of the pore. Industrial furnace. 3. The sum of the volumes of the heat storage portion covered by the exhaust passage opening of the heat storage portion divided into a plurality of portions is equal to that of the heat storage portion covered by the air supply ventilation opening. 2. The industrial furnace according to claim 1, wherein the shape and relative positional relationship between the ventilation opening provided in the rotating disk and the through hole provided in the fixing disk are set so as to be equal to or greater than the sum of the volumes. . 4. The air supply blower is directly connected to a portion of the switching mechanism which communicates with the air supply ventilation opening.
The industrial furnace as described. 5. The exhaust fan is directly connected to a portion of the switching mechanism that communicates with the exhaust ventilation opening.
The industrial furnace as described. 6. An air supply blower is directly connected to a portion of the switching mechanism communicating with the air supply ventilation opening, and an exhaust fan is communicated with the exhaust gas ventilation opening of the switching mechanism. The industrial furnace according to claim 1, which is directly connected to a portion to be heated. 7. An air supply blower is directly connected to a portion of the switching mechanism communicating with the air supply ventilation opening, and an exhaust fan is communicated with the exhaust gas ventilation opening of the switching mechanism. 2. The industrial furnace according to claim 1, wherein the supply blower and the exhaust fan are directly driven by the same driving means. 8. The industrial furnace according to claim 1, wherein the heat storage body is divided into a plurality of heat storage parts in an axial direction, and a gap for generating a turbulent flow field is provided between the heat storage parts. 9. The industrial furnace according to claim 1, further comprising a partition for separating the heat storage body, the partition extending radially, and the partition wall of the switching mechanism extending in a circumferential direction. 10. The industrial furnace according to claim 1, wherein said rotating disk comprises a disk which is rotated only in one direction. 11. The industrial furnace according to claim 1, wherein said rotary disk rotating drive means comprises a motor. 12. The industrial furnace according to claim 1, wherein a drive motor for rotating a rotating portion of the switching mechanism is installed on a side of the inner and outer circumferences of the partition wall where an air supply ventilation opening is provided. 13. The rotating disk of the switching mechanism comprises a three-dimensional disk, and the fixed disk side end of each of the air supply ventilation opening and the exhaust ventilation opening formed in the rotation disk is the same circle. It is provided on the circumference,
The industrial furnace according to claim 1, wherein the through-holes provided in the fixed disk are shared for supply and exhaust and are arranged on the same circumference. 14. The rotating disk of the switching mechanism comprises a three-dimensional disk, and the fixed disk side ends of the air supply ventilation opening and the exhaust ventilation opening formed in the rotation disk are the same circle. It is provided on the circumference,
One of an air supply passage connected to the air supply opening from the upstream side and an exhaust passage connected to the exhaust air opening from the downstream side is connected to the switching mechanism in the axial direction, and the other is connected to the switching mechanism. The industrial furnace according to claim 1, wherein the industrial furnace is connected to the switching mechanism in a direction perpendicular to an axial direction. 15. The industrial furnace according to claim 1, further comprising an exhaust attraction mechanism for ejecting air toward a downstream side of the exhaust flow at a downstream side of the exhaust flow at the exhaust ventilation opening. 16. The heat storage element according to claim 1, wherein each part of the heat storage element is accommodated in a cylindrical sleeve.
The industrial furnace as described. 17. A part of each of the plurality of separated heat storage bodies is accommodated in a cylindrical sleeve, and a vent hole of the burner tile has a funnel-shaped portion expanding toward an upstream side. The industrial furnace according to claim 1, wherein the vent is smoothly connected to the cylindrical sleeve through the funnel. 18. The industrial furnace according to claim 1, wherein said rotating disk and said fixed disk are sealed by metal surface contact, and said rotating disk is pressed against said fixed disk by spring bias. 19. The industrial furnace according to claim 1, wherein the ventilation holes provided in the rotating disk have a fan shape, and the through holes provided in the fixed disk also have a fan shape. 20. The industrial furnace according to claim 1, wherein said rotating disk comprises a disk which is reciprocated. 21. The industrial furnace according to claim 1, wherein the driving means for reciprocatingly rotating the rotating disk is an air cylinder. 22. The heat storage device, wherein the switching mechanism includes a rotating disk that selectively takes a first position and a second position and is reciprocated between the first position and the second position. The industrial furnace according to claim 1, wherein the shutter is configured to switch between the first position and the second position without forming a portion through which air supply or exhaust does not flow in a part of the plurality of divided parts of the body. 23. A fuel supply amount adjusting mechanism which throttles fuel when the air supply opening of the rotary disk is located between the through holes of the fixed disk and the air supply is reduced. The industrial furnace according to claim 1. 24. The industrial furnace according to claim 1, wherein the exhaust ventilation opening of the rotating disk always takes a position at least part of which is not closed by a portion between the through holes of the fixed disk. 25. The industrial furnace according to claim 1, wherein the switching mechanism comprises a multi-hole shutter having three or more ventilation openings. 26. The industrial furnace includes a melting furnace, a sintering furnace, a preheating furnace, a soaking furnace, a forging furnace, a heating furnace, an annealing furnace, a soaking furnace, a plating furnace, a drying furnace, a tempering furnace, and a quenching furnace. , Tempering furnace, redox furnace, firing furnace, baking furnace, roasting furnace, melting and holding furnace, forehearth,
Crucible furnace, homogenizing furnace, aging furnace, reaction furnace, distillation furnace, ladle drying preheating furnace, mold firing preheating furnace, normalizing furnace, brazing furnace, carburizing furnace, coating drying furnace, holding furnace, nitriding furnace, salt The industrial furnace according to claim 1, which is a kind of furnace selected from a bath furnace, a glass melting furnace, a boiler including a power generation boiler, an incinerator including a refuse incinerator, and a hot water supply device. 27. A heat accumulator divided into a plurality of portions, a hole arranged on one side in the axial direction of the heat accumulator, into which a fuel injection nozzle is inserted, and a plurality of ventilation holes for switching between supply and discharge.
A burner tile having a supply / exhaust surface in which the ventilation hole is opened; and a rotating disk and a fixed disk disposed on the other axial side of the heat storage body and slidably in surface contact with each other. An exhaust partition wall, the fixed disk has a plurality of through holes, the rotating disk has a plurality of ventilation openings that are communicated and blocked by rotation of the rotation disk, and the ventilation openings Is a burner for heat storage combustion, comprising: a switching mechanism including an air supply ventilation opening communicating with one side of the partition wall and an exhaust ventilation opening communicating with the other side of the partition wall. 28. The sum of the passage cross-sectional areas of the ventilation holes covered by the exhaust ventilation opening of the plurality of ventilation holes provided in the burner tile is covered by the air supply ventilation opening. 28. The shape and relative positional relationship between the ventilation opening provided in the rotating disk and the through hole provided in the fixing disk are set so as to be equal to or greater than the cross-sectional area of the passage of the pore. Burner for heat storage combustion. 29. The heat storage combustion burner according to claim 27, wherein an air supply blower is directly connected to a portion of said switching mechanism communicating with said air supply ventilation opening. 30. The heat storage combustion burner according to claim 27, wherein an exhaust fan is directly connected to a portion of said switching mechanism communicating with said exhaust ventilation opening. 31. An air supply blower is directly connected to a portion of the switching mechanism communicating with the air supply ventilation opening, and an exhaust fan is communicated with the exhaust gas ventilation opening of the switching mechanism. 28. The heat storage combustion burner according to claim 27, wherein the burner is directly connected to a portion to be heated. 32. An air supply blower is directly connected to a portion of the switching mechanism communicating with the air supply ventilation opening, and an exhaust fan is communicated with the exhaust gas ventilation opening of the switching mechanism. 28. The heat storage combustion burner according to claim 27, wherein the burner for air supply and the fan for exhaust are directly driven by the same driving means. 33. The sum of the volumes of the heat storage portion covered by the exhaust passage opening in the heat storage portion divided into a plurality of portions is equal to that of the heat storage portion covered by the air supply ventilation opening. The shape and relative positional relationship between the ventilation opening provided in the rotary disk and the through hole provided in the fixing disk are set so as to be equal to or greater than the sum of the volumes. Burner. 34. The heat storage combustion burner according to claim 27, further comprising a partition for separating said heat storage body, said partition extending radially, and said partition wall of said switching mechanism extending in a circumferential direction. 35. The heat storage combustion burner according to claim 27, wherein the heat storage body is divided into a plurality of heat storage parts in the axial direction, and a gap for generating a turbulent flow field is provided between the heat storage parts. 36. The heat storage combustion burner according to claim 27, wherein the rotating disk is a disk that rotates only in one direction. 37. The heat storage combustion burner according to claim 27, wherein the rotating drive means of the rotary disk comprises a motor. 38. The heat storage combustion burner according to claim 27, wherein a drive motor for rotating a rotating portion of the switching mechanism is provided on a side of the inner and outer circumferences of the partition wall where an air supply ventilation opening is provided. . 39. The rotating disk of the switching mechanism comprises a three-dimensional disk, and the air supply ventilation opening and the exhaust ventilation opening formed in the rotation disk are provided on the same circumference, 28. The heat storage combustion burner according to claim 27, wherein the through-hole provided in the fixed disk is shared by the air supply and the exhaust and arranged on the same circumference. 40. The rotating disk of the switching mechanism is a three-dimensional disk, and the fixed disk side ends of the air supply ventilation opening and the exhaust ventilation opening formed in the rotation disk are the same circle. It is provided on the circumference,
One of an air supply passage connected to the air supply opening from the upstream side and an exhaust passage connected to the exhaust air opening from the downstream side is connected to the switching mechanism in the axial direction, and the other is connected to the switching mechanism. 28. The heat storage combustion burner according to claim 27, wherein the burner is connected to the switching mechanism in a direction perpendicular to the axial direction. 41. The heat storage combustion burner according to claim 27, further comprising an exhaust attraction mechanism for ejecting air toward the downstream side of the exhaust flow at a downstream side of the exhaust flow at the exhaust ventilation opening. 42. A part of each of the plurality of separated heat storage bodies is accommodated in a cylindrical sleeve.
A burner for heat storage combustion according to claim 7. 43. A part of each of the plurality of separated heat storage bodies is accommodated in a cylindrical sleeve, and a vent hole of the burner tile has a funnel-shaped part expanding toward an upstream side. 28. The burner according to claim 27, wherein the ventilation hole is smoothly connected to the cylindrical sleeve through the funnel. 44. The heat storage combustion burner according to claim 27, wherein said rotating disk and said fixed disk are sealed by metal surface contact, and said rotating disk is pressed against said fixed disk by spring bias. 45. The heat storage combustion burner according to claim 27, wherein the ventilation holes provided in the rotating disk have a fan shape, and the through holes provided in the fixed disk also have a fan shape. 46. The heat storage combustion burner according to claim 27, wherein said rotating disk is a reciprocating disk. 47. The heat storage combustion burner according to claim 27, wherein the driving means for reciprocatingly rotating the rotary disk is an air cylinder. 48. The heat storage device, wherein the switching mechanism includes a rotating disk that selectively takes a first position and a second position and is reciprocated between the first position and the second position. 28. The heat storage combustion burner according to claim 27, wherein the shutter switches between the first position and the second position without forming a portion through which air supply or exhaust does not flow in a part of the plurality of divided portions of the body. 49. A fuel supply amount adjusting mechanism which throttles the fuel when the air supply is reduced when the air supply ventilation opening of the rotary disk is located between the through holes of the fixed disk. A heat storage combustion burner according to claim 27. 50. The exhaust ventilation opening of the rotating disk always takes a position where at least a part thereof is not closed by a portion between the through holes of the fixed disk.
A burner for regenerative combustion as described. 51. The heat storage combustion burner according to claim 27, wherein said switching mechanism comprises a multi-hole shutter having three or more ventilation openings. 52. An air supply is supplied into the furnace through a ventilation hole serving as an air supply hole among a plurality of ventilation holes opened and closed between the air supply and exhaust surfaces, and a flow direction of the air supply from the air supply and exhaust surface. A fuel and an air supply are mixed and burned forward, and the furnace exhaust gas is used as an exhaust hole of the plurality of air holes, and the sum of the cross-sectional area of the air passage serves as the air supply hole. The method for burning an industrial furnace, comprising the steps of: