JP2011027271A - Combustion device for furnace heating - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combustion device for furnace heating capable of adjusting a ratio between a primary air amount flowing in a primary air flow passage and a secondary air amount flowing in a secondary air flow passage while simplifying the composition, and also capable of reducing an installation space outside a furnace. <P>SOLUTION: A long burner B formed in a dual-pipe shape is provided while penetrating a back wall part 4A positioned on a side away from a furnace wall 1A of a wind box 4. An edge part of the burner B is positioned inside a cylinder part T while forming the secondary air flow passage A2 for flowing the air in the wind box as secondary air between its outer peripheral surface and an inner peripheral surface of the cylinder part T. The primary air flow passage A1 provided for the burner B is provided at the edge part of the burner B in a state that the air in the wind box is taken from a rear end part and is made to flow to the edge side. A burner supporting means D is provided for supporting the burner B with respect to the back wall part 4A of the wind box 4 to be able to freely adjust its position in the longitudinal direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

In the present invention, a wind box connected to the furnace wall in a state communicating with a flame passage hole formed in the furnace wall has a cylindrical tube portion on the furnace wall side, and combustion air is supplied from the combustion air supply means. Provided in the supplied state,
A long burner formed in a double tube having a fuel flow path for allowing gas fuel to flow in the center and a primary air flow path for allowing primary air to flow to the outer periphery of the fuel flow path. Provided in a state of penetrating the back wall portion located on the side away from the furnace wall,
In the state where the tip of the burner forms a secondary air flow path for allowing the air in the wind box to flow as secondary air between the outer peripheral surface of the burner and the inner peripheral surface of the cylindrical portion. The present invention relates to a furnace for heating a furnace located inside.

Such a furnace heating combustion apparatus is used to heat various furnaces such as a melting furnace for melting an object to be melted such as glass or metal, and a heating furnace for heating an object to be heated such as a forged product. .
As such a furnace heating combustion apparatus, a burner is provided in a state extending over the entire length of the burner to form a fuel flow path, and a tip from a position located outside the wind box in the tubular body An air supply tubular body, which is positioned so as to cover a portion extending over a portion, forms a primary air flow path with the tubular body, and forms a secondary air flow path with the tubular portion of the wind box; In addition to the fact that combustion air from a blower as combustion air supply means is supplied to the wind box, a portion located outside the wind box in the tubular body for air supply There is one configured to be supplied to (see, for example, Patent Document 1).

JP 2002-13704 A (FIGS. 1 to 3)

In the conventional furnace heating combustion apparatus, the burner portion located outside the burner wind box has a double tubular large diameter, which has the disadvantage of increasing the installation space, and combustion air from the blower In addition to supplying the air to the wind box, the structure for supplying the combustion air to the burner is complicated, because the air supply tubular body is supplied to a portion located outside the wind box, There was an inconvenience that the installation space outside the furnace becomes large.
In other words, the space outside the furnace is used for various purposes such as being used as a work space for maintenance and the like, and it is desired to make various devices arranged in the space compact. However, the conventional furnace heating combustor requires a large installation space outside the furnace in addition to the complicated configuration, and it is desired to make the apparatus compact.

Further, in such a furnace heating combustion apparatus, the ratio of the primary air amount flowing through the primary air passage and the secondary air amount flowing through the secondary air passage is adjusted to Combustion state in which the gas fuel to be ejected is sufficiently primary burned with sufficient primary air while secondary combustion is performed with secondary air, or gas fuel ejected from the fuel flow path is being burned with less primary air In order to adjust the formation state of the combustion flame, such as switching the combustion state in which secondary combustion is performed with sufficient secondary air according to the use situation, the amount of primary air flowing through the primary air flow path and It is desirable to be able to adjust the ratio with the amount of secondary air flowing through the secondary air flow path.
And in the conventional furnace heating combustion apparatus, in order to be able to adjust the ratio of the primary air amount flowing through the primary air passage and the secondary air amount flowing through the secondary air passage, The flow rate supplying combustion air from the blower to the wind box and the flow channel supplying combustion air from the blower to the air supply tubular body are provided with a damper for adjusting the air volume. When the damper is provided, the installation space outside the furnace is further increased.

  The present invention has been made in view of the above circumstances, and its purpose is to determine the ratio between the amount of primary air flowing through the primary air flow path and the amount of secondary air flowing through the secondary air flow path. The object of the present invention is to provide a furnace heating combustion apparatus capable of simplifying the configuration and reducing the installation space outside the furnace while allowing adjustment.

The combustion apparatus for furnace heating according to the present invention is such that a wind box connected to the furnace wall in a state of communicating with a flame passage hole formed in the furnace wall has a cylindrical tube portion on the furnace wall side and supplies combustion air Provided with combustion air supplied from the means,
A long burner formed in a double tube having a fuel flow path for allowing gas fuel to flow in the center and a primary air flow path for allowing primary air to flow to the outer periphery of the fuel flow path. Provided in a state of penetrating the back wall portion located on the side away from the furnace wall,
In the state where the tip of the burner forms a secondary air flow path for allowing the air in the wind box to flow as secondary air between the outer peripheral surface of the burner and the inner peripheral surface of the cylindrical portion. The first characteristic configuration is
The primary air flow path provided in the burner is provided at the tip of the burner in a state in which air in the wind box is taken in from the rear end and flows to the tip side, and the burner has its tip It is formed in a state where the part has a larger diameter than other parts,
In order to change and adjust the ratio between the amount of primary air flowing through the primary air flow path and the amount of secondary air flowing through the secondary air flow path, the position of the burner can be adjusted in the longitudinal direction thereof. The present invention is characterized in that burner support means for supporting the back wall portion is provided.

  That is, a part of the combustion air supplied to the wind box from the combustion air supply means is taken in from the rear end of the primary air flow path located in the wind box, and passes through the primary air flow path as primary air. In addition, a part of the combustion air supplied to the wind box from the combustion air supply means is caused by the outer peripheral surface of the tip of the burner located in the wind box and the inner periphery of the cylinder part in the wind box. The secondary air flow path formed between the two surfaces is circulated as secondary air, and the gaseous fuel that flows through the fuel flow path and is ejected from the tip of the fuel flow path is the primary air and It will be mixed with secondary air and burned.

  Further, the position of the burner is adjusted in the longitudinal direction with respect to the back wall portion of the wind box, the primary air amount flowing through the primary air flow path, and the secondary air amount flowing through the secondary air flow path, By changing and adjusting the ratio, the combustion state in which the gas fuel ejected from the fuel flow path is subjected to secondary combustion in the secondary air while being sufficiently primary burned in sufficient primary air, and the fuel is ejected from the fuel flow path. The combustion state of the burner can be switched, for example, by switching the combustion state in which secondary gas combustion is performed with sufficient secondary air while burning a small amount of gas fuel with primary air.

  That is, by adjusting the position of the burner in the longitudinal direction with respect to the back wall portion of the wind box, the amount by which the tip of the burner is inserted into the tube portion of the wind box can be changed. If the amount inserted into the cylindrical portion of the tip portion is changed, the flow resistance of the secondary air flow path formed between the outer peripheral surface of the tip portion of the burner and the inner peripheral surface of the cylindrical portion in the wind box increases or decreases. Thus, the ratio of the primary air amount through which the combustion air supplied into the wind box flows through the primary air passage and the secondary air amount through the secondary air passage is changed and adjusted. .

The portion located outside the wind box of the burner forms a fuel flow path through which gas fuel flows, but it is not necessary to form a primary air flow path, so the diameter is small, and the burner is installed outside the furnace. Space can be reduced.
Further, although the ratio of the primary air flow through the primary air flow path and the secondary air flow through the secondary air flow path is changed and adjusted, the combustion air supply is performed outside the furnace. Since only the flow path for guiding the combustion air from the means to the wind box is provided, the configuration for supplying the combustion air is simplified, and the installation space for installing the configuration for supplying the combustion air outside the furnace Can be reduced.

  Furthermore, it is possible to support the burner with respect to the back wall portion of the wind box so that the position of the burner can be adjusted in the longitudinal direction with a simple configuration, and the back wall portion of the wind box is cooled by outside air. Therefore, the supporting means for supporting the burner on the back wall portion of the wind box is prevented from being damaged by being heated by the combustion heat and adjusting the position of the burner in the longitudinal direction for a long period of time. Can be performed well.

  That is, the amount of primary air flowing through the primary air flow path provided at the tip of the burner, and the secondary air flow formed between the outer peripheral surface of the burner tip and the inner peripheral surface of the cylindrical portion of the wind box. In adjusting the ratio of the amount of secondary air flowing through the passage, the flow path leading the combustion air supplied from the combustion air supply means to the primary air flow path and the secondary air flow path in the wind box It is conceivable to provide a damper in the wind box that partitions the flow path to be guided and adjusts the amount of air guided from the wind box to the flow path. Due to the fact that the inside is partitioned for flow path formation and the damper is provided in the wind box, the configuration is likely to be complicated, and in the wind box that is heated by combustion heat, Because it is equipped with a damper, the damper is heated and damaged by the combustion heat, There is a possibility that it is difficult to use well over a period.

  In short, according to the first characteristic configuration of the present invention, the ratio of the primary air amount flowing through the primary air passage and the secondary air amount flowing through the secondary air passage can be adjusted. It is possible to simplify the configuration, to reduce the installation space outside the furnace, and to provide a furnace heating combustion apparatus that can be used satisfactorily for a long period of time.

In addition to the first feature configuration, the second feature configuration of the present invention includes:
Fuel adjusting means for changing and adjusting the amount of gas fuel supplied to the burner is provided,
The combustion air supply means is configured to be able to change and adjust the supply amount of combustion air.

  That is, adjusting the amount of gas fuel supplied to the burner by the fuel adjusting means, and changing and adjusting the amount of combustion air supplied from the combustion air supply means in accordance with the adjustment of the gas fuel supply amount Thus, the combustion amount of the gas fuel can be changed in a state where the state of supplying the air amount necessary for burning the supplied gas fuel is maintained.

  In addition to changing the combustion amount of the gas fuel in this way, adjusting the ratio of the primary air amount flowing through the primary air passage and the secondary air amount flowing through the secondary air passage. Therefore, a large amount of gas fuel can be burned in secondary air with sufficient primary air while being burned in secondary air, and secondary with sufficient secondary air while being burned with less primary air. It is sufficient to switch between the combustion state to be burned, or to burn a small amount of gas fuel in the secondary combustion with secondary air while sufficiently burning the primary gas with sufficient primary air and burning with a little primary air It is possible to switch to various combustion states depending on the use situation, such as switching the combustion state in which secondary combustion is performed with secondary air.

  In short, according to the second characteristic configuration of the present invention, it is possible to provide a furnace heating combustion apparatus capable of switching to various combustion states while changing the combustion amount in addition to the operational effects of the first characteristic configuration.

The third feature configuration of the present invention is in addition to the second feature configuration,
The burner is provided over the entire length of the fuel supply tubular body to form the fuel flow path, and is positioned so as to cover the tip of the tubular body. A cylindrical flow path forming body that forms a primary air flow path and forms the secondary air flow path between the air duct and the cylindrical portion of the wind box, a rear end portion of the flow path forming body, and the fuel supply It is characterized in that it is formed in a state of being provided with a flame holding plate that is disposed between the tube body and the air passage hole for taking in primary air.

That is, the burner is configured to cover the tip of the fuel supply tubular body forming the fuel flow path with the flow path forming body.
And since it has a flame-holding plate disposed between the rear end portion of the flow path forming body and the fuel supply tubular body and formed with air flow holes for taking in primary air, the amount of gas combustion When there is little, gas fuel can be burned favorably, flame-holding with a flame-holding plate.
Further, when the amount of gas combustion is large, a large amount of gas fuel can be burned while holding the flame in the cylindrical portion of the wind box.
As described above, the gas fuel can be burned while changing the flame holding mode between the case where the gas combustion amount is large and the case where the gas combustion amount is small, so that it can be burned well even if the gas combustion amount is changed in a large range. In other words, the gas combustion amount can be changed within a large range.

  In short, according to the third characteristic configuration of the present invention, in addition to the operational effects of the second characteristic configuration, it is possible to provide a furnace heating combustion apparatus capable of changing the amount of gas combustion within a large range.

In addition to the first to third feature configurations described above, the fourth feature configuration of the present invention includes:
A cylindrical burner support body on which the burner is movably fitted in its longitudinal direction is provided on the back wall portion of the wind box, and the positioning state for positioning the burner with respect to the burner support body and the positioning are released. A positioning body that can be switched to a release state is provided.
The burner support means is a means for supporting the burner by the burner support so as to be movable in the longitudinal direction, and for positioning the movement of the burner in the longitudinal direction by the positioning body. .

That is, the positioning body is switched to a release state in which the positioning of the burner is released, and the burner is moved and adjusted in the longitudinal direction with respect to the cylindrical burner support provided on the back wall portion of the wind box, and the positioning body Adjusting the position of the burner in the longitudinal direction, that is, the ratio of the amount of primary air flowing through the primary air flow path to the amount of secondary air flowing through the secondary air flow path Can do.
Incidentally, the positioning body can be configured by a pressing bolt that is screwed to the burner support so as to be movable in the radial direction and presses the outer surface of the burner.

  As described above, since the burner can be moved and adjusted in the longitudinal direction with a simple configuration including the cylindrical burner support and the positioning body, the overall configuration can be simplified by simplifying the burner support means. Can be achieved.

  In addition, it is easy to install a cylindrical burner support on the back wall of the windbox, even for existing windboxes, so it is necessary to modify existing equipment and install burner support means. That is, it is possible to satisfactorily modify the existing apparatus to the apparatus of the present invention.

  In short, according to the fourth feature configuration of the present invention, in addition to the operational effects of the first to third feature configurations, the overall configuration can be simplified, and the existing device is modified by modifying the existing device. It is possible to provide a combustion apparatus for furnace heating that can be favorably modified to the above apparatus.

In addition to any of the first to fourth features described above, the fifth characteristic configuration of the present invention includes:
Preheating means for preheating combustion air supplied from the combustion air supply means with exhaust gas discharged from the inside of the furnace is provided.

That is, since the combustion air supplied from the combustion air supply means is preheated by the preheating means by the exhaust gas discharged from the inside of the furnace, the inside of the furnace can be efficiently heated to a high temperature.
Incidentally, when the combustion air is preheated in this way, the inside of the wind box becomes even hotter. However, as described in the first characteristic configuration, the back wall of the wind box Therefore, even when preheating the combustion air, the support means for supporting the burner on the back wall portion of the wind box is prevented from being damaged by being heated by the combustion heat. Can be satisfactorily adjusted over a long period of time.

  In short, according to the fifth characteristic configuration of the present invention, in addition to the operational effects of the first to fourth characteristic configurations, it is possible to provide a furnace heating combustion apparatus that can efficiently heat the inside of the furnace to a high temperature.

Schematic side view of furnace for combustion Notched side view of burner mounting part Notched side view of burner mounting part Vertical side view of burner tip Vertical front view of the burner tip Vertical rear view of burner base end

Embodiment
Hereinafter, an embodiment of a combustion apparatus for furnace heating according to the present invention will be described with reference to the drawings. The combustion apparatus for furnace heating of the present embodiment is exemplified for use in heating a glass melting furnace G as shown in FIG. To do.
That is, the glass melting furnace G is configured to include a melting tank 2 below the inside of the furnace body 1, and the furnace heating combustion device forms a horizontal flame F in the furnace space above the melting tank 2. In this state, the gas fuel is combusted.

As shown in FIG. 2, the furnace heating combustion apparatus includes a fuel flow path R through which gas fuel flows at the center and a primary air flow path A1 through which primary air flows at the outer periphery. A long burner B formed in a tubular shape, a wind box 4 connected to the furnace wall 1A in the furnace body 1 in a state communicating with the flame passage hole 3, and an air flow path 6 to the wind box 4 A blower fan K as combustion air supply means for supplying combustion air through is provided.
The air flow path 6 is provided with a heat exchanging portion E as preheating means for preheating the combustion air supplied from the blower fan K with the exhaust gas discharged from the inside of the furnace. And the furnace temperature is set to 1000 ° C., for example.

  The wind box 4 is formed in a state that the whole is in a cylindrical shape in a sideways posture and the back portion is closed by a back wall portion 4A located on the side away from the furnace wall 1A. An inflow port 5 is formed in the upper part. And the front-end | tip part by the side of a furnace wall is comprised as the cylindrical cylinder part T connected to 1 A of furnace walls.

As shown in FIGS. 2 and 3, the burner B is provided in a state of penetrating the back wall portion 4 </ b> A in the wind box 4, and its tip end portion is the outer peripheral surface and the inner peripheral surface of the tubular portion T of the wind box 4. The secondary air flow path A2 for allowing the air in the wind box to flow as secondary air is formed between and the cylinder portion T.
And the primary air flow path A1 provided to the burner B is provided in a state in which the air in the wind box is taken in from the rear end portion and flows to the front end side at the front end portion of the burner B, The tip portion is formed in a state of having a larger diameter than other portions.

  The burner B will be described with reference to FIGS. 4 and 5 as well. The burner B is provided in a state extending over its entire length to form the fuel flow path R, and the tubular body. 7 is a tube that is positioned so as to cover the tip of the tube 7, forms a primary air channel A 1 with the tubular body 7, and forms a secondary air channel A 2 with the tube part T of the wind box 4. And a flame holding plate 9 disposed between the rear end portion of the flow path forming body 8 and the tubular body 7 and having an air flow hole S for taking in primary air. It is formed in a prepared state.

The tubular body 7 includes a cylindrical body 7A on the proximal end side, an intermediate cylindrical body 7B that is externally fitted on the distal end of the cylindrical body 7A on the proximal end side, and a distal cylinder connected to the intermediate cylindrical body 7B. A gas fuel supply pipe 10 that supplies gas fuel is connected to the rear end portion of the cylinder 7A on the base end side.
Incidentally, the intermediate cylinder 7B, the tip cylinder 7C, and the flame holding plate 9 are integrally formed as a nozzle, and the intermediate cylinder 7B in the nozzle is a base cylinder 7A. On the other hand, it is configured to be externally fitted in a screwed state.
As will be described later, the gas fuel supply pipe 10 is configured by using a flexible pipe that can be flexed and extended in order to allow the burner B to be adjusted in its longitudinal direction.

The flame holding plate 9 is positioned at an interval along the outer circumferential direction of the plate body 9A and the annular plate body 9A that is externally fitted to the cylindrical body 7C at the tip of the tubular body 7, and the plate body 9A. And a support body 9B that connects the flow path forming body 8 and the air circulation hole S is formed between the plate body 9A and the flow path forming body 8 and between the adjacent support bodies 9B. ing.
In addition, a cooling hole U through which air flows for cooling is formed in the inner peripheral edge portion and the outer peripheral edge portion of the plate body 9A as a measure for preventing the flame holding plate 9 from burning. In the vicinity of the plate body 9A, a plurality of ejection holes 14 for ejecting gas fuel into the primary air flow path A1 are formed at intervals in the circumferential direction to improve flame holding performance.

As shown in FIG. 1, a fuel adjustment valve V is provided as a fuel adjustment means for changing and adjusting the amount of gas fuel supplied to the burner B, and the blower fan K changes and adjusts the supply amount of combustion air. Accordingly, the rotational speed is freely adjustable.
The control means H that controls the operation of the fuel adjustment valve V and the blower fan K supplies the burner B with an amount of fuel corresponding to the set combustion amount based on the combustion amount set by the combustion amount setting device W. In order to supply the combustion air in an amount corresponding to the set combustion amount to the wind box 4, the opening adjustment of the fuel adjustment valve V and the speed adjustment of the blower fan K are performed.

As shown in FIG. 2, FIG. 3 and FIG. 6, in order to change and adjust the ratio between the amount of primary air flowing through the primary air flow path A1 and the amount of secondary air flowing through the secondary air flow path A2. Burner support means D is provided for supporting B with respect to the back wall 4A of the wind box 4 so that the position of B can be adjusted in the longitudinal direction.
When the explanation is added, the cylindrical burner support 12 to which the burner B is movably fitted in the longitudinal direction is fixed to the back wall portion 4A by a bolt with the annular plate portion 12A attached to the outside thereof, As a positioning body that is provided on the back wall portion 4A of the wind box 4 and can be switched between a positioning state in which the burner is positioned with respect to the burner support 12 and a release state in which the positioning is released, its diameter with respect to the burner support A pressing bolt 13 is provided that is screwed so as to be movable in the direction and presses the outer surface of the burner.
The burner support means D is configured as means for supporting the burner B by the burner support 12 so as to be movable in the longitudinal direction, and positioning the movement of the burner B in the longitudinal direction by the pressing bolt 13. .

  In addition, although not illustrated, the outer surface of the tubular body 7 in the burner B is marked with a scale in the longitudinal direction at intervals, and the scale in the longitudinal direction of the burner B with respect to the burner support 12 is used as a guide. By confirming the position, the insertion amount of the tip of the burner B with respect to the tube portion T of the wind box 4 can be recognized.

Incidentally, as shown in FIG. 2, in this embodiment, the inner diameter P of the cylindrical portion T in the wind box 4 is 200 mm, and the outer diameter of the tip of the burner B, that is, the outer diameter Q of the flow path forming body 8 is approximately. 190 mm, the length M of the flow path forming body 8 is approximately 110 mm, the inner diameter N of the cylindrical body 7C at the tip of the tubular body 7 is 80 mm, and the length L of the cylindrical portion T is approximately 200 mm. However, the dimensions of each part can be variously changed.
However, the ratio (Q / P) of the outer diameter Q of the flow path forming body 8 to the inner diameter P of the cylindrical portion T is preferably set to 0.8 to 0.95. The length M is desirably set to a length in the range of 1/2 to 3/4 of the inner diameter P of the cylindrical portion T.

  Further, in this embodiment, the flow rate of the gas fuel is adjusted in the range of 50 to 100 Nm3 / H, and the flow rate of the combustion air is adjusted in the range of approximately 600 to 1200 Nm3 / H, and the burner B As shown in FIG. 2, by adjusting the position in the longitudinal direction, the entire tip of the burner B is inserted into the cylindrical portion T, and the length of the tip of the burner B as shown in FIG. The length for inserting the tip end portion of the burner B into the inside of the tube portion T is changed in a range between the state where half of M is inserted into the inside of the tube portion T.

An example of the operation method of the furnace heating combustion apparatus described above will be described below.
When the supply amount of the gas fuel is small, that is, when the flow rate of the gas fuel is small, as shown in FIG. 2, the entire tip of the burner B is inserted into the cylindrical portion T, and the secondary air flow path A2 Gas fuel can be burned while holding the flame with the flame holding plate 9 while making the combustion air flow sufficiently through the primary air flow path A1 so that the combustion air does not flow through the flame.

Further, when the supply amount of the gas fuel is large, that is, when the flow rate of the gas fuel is large, as shown in FIG. 3, half of the length M of the tip end portion of the burner B is inserted into the cylindrical portion T, Gas while holding the flame in the cylindrical portion T of the wind box 4 while allowing the combustion air to flow easily through the secondary air flow path A2 and allowing the combustion air to sufficiently flow through the secondary air flow path A2. Fuel can be burned.
Incidentally, in this operation method, although the length of the flame F varies depending on the amount of gas fuel supplied, the temperature at the front end side of the flame F can be increased regardless of the amount of gas fuel supplied. It will be a thing.

[Another embodiment]
Next, another embodiment will be described.
(A) In the above embodiment, the furnace heating combustion apparatus of the present invention is applied to the glass melting furnace G. However, the furnace heating combustion apparatus of the present invention is applied to various heating furnaces such as a forging furnace. It can be done.

(B) In the above embodiment, the case where the burner support means D is constituted by the cylindrical burner support body 12 and the positioning body 13 with which the burner B is movably fitted in the longitudinal direction thereof is exemplified. The specific configuration of the support means D can be variously changed.

(C) In the above embodiment, by adjusting the position of the burner B in the longitudinal direction, the state in which the entire tip of the burner B is inserted into the cylindrical portion T and half the length M of the tip of the burner B In the range between the state in which the end portion of the burner B is inserted into the cylindrical portion T, the case where the length for inserting the distal end portion of the burner B into the inner portion of the cylindrical portion T is exemplified. In the range between the state in which the entirety is inserted into the tube portion T and the state in which only the tip portion of the tip portion of the burner B is inserted into the tube portion T, the tip end portion of the burner B is placed inside the tube portion T. The range in which the length for inserting the tip end of the burner B into the cylindrical portion T by adjusting the position of the burner B in the longitudinal direction, such as changing the length to be inserted into the cylinder T, depends on the purpose of use. Can be changed.

(2) In the above embodiment, the case where the flame passage hole 3 is formed to have a large diameter on the inner side of the furnace is exemplified, but the shape of the flame passage hole 3 is variously changed, such as being formed in a right cylindrical shape. it can. Moreover, in the said embodiment, although the case where the flame passage hole 3 was formed in the furnace wall 1A was illustrated, generally the burner tile which forms the flame passage hole 3 is provided in the furnace wall 1A.

(E) In the above-described embodiment, the case where one burner B is disposed with respect to the furnace body 1 is exemplified, but in general, a plurality of burners B are disposed with respect to the furnace body 1. is there.
And when the some burner B is arrange | positioned, it is not necessary to adjust the combustion amount of the some burner B so that it may become the same, You may adjust so that it may burn with a different combustion amount.

(F) In the above embodiment, the flame holding plate 9 is exemplified by the plate body 9A and the support plate 9B. However, the air circulation hole S is formed by forming a notch or a hole in the outer peripheral portion. Various modifications can be made to the specific configuration of the flame holding plate 9, for example, the flame holding plate 9 is configured by a single plate-like body.

DESCRIPTION OF SYMBOLS 1A Furnace wall 3 Flame passage hole 4 Wind box 4A Back wall part 7 Tubular body 8 Flow path formation body 9 Flame holding plate 12 Burner support body 13 Positioning body A1 Primary air flow path A2 Secondary air flow path B Burner D Burner support means K Combustion air supply means R Fuel flow path S Air circulation hole T Tube portion V Fuel adjustment means

Claims (5)

A state in which the wind box connected to the furnace wall in a state communicating with the flame passage hole formed in the furnace wall has a cylindrical tube portion on the furnace wall side and combustion air is supplied from the combustion air supply means Provided in
A long burner formed in a double tube having a fuel flow path for allowing gas fuel to flow in the center and a primary air flow path for allowing primary air to flow to the outer periphery of the fuel flow path. Provided in a state of penetrating the back wall portion located on the side away from the furnace wall,
In the state where the tip of the burner forms a secondary air flow path for allowing the air in the wind box to flow as secondary air between the outer peripheral surface of the burner and the inner peripheral surface of the cylindrical portion. A combustion apparatus for heating a furnace located inside
The primary air flow path provided in the burner is provided at the tip of the burner in a state in which air in the wind box is taken in from the rear end and flows to the tip side, and the burner has its tip It is formed in a state where the part has a larger diameter than other parts,
In order to change and adjust the ratio between the amount of primary air flowing through the primary air flow path and the amount of secondary air flowing through the secondary air flow path, the position of the burner can be adjusted in the longitudinal direction thereof. Combustion apparatus for furnace heating provided with burner support means for supporting the back wall of the furnace. Fuel adjusting means for changing and adjusting the amount of gas fuel supplied to the burner is provided,
The combustion apparatus for furnace heating according to claim 1, wherein the combustion air supply means is configured to be able to change and adjust the supply amount of combustion air.   The burner is provided over the entire length of the fuel supply tubular body to form the fuel flow path, and is positioned so as to cover the tip of the tubular body. A cylindrical flow path forming body that forms a primary air flow path and forms the secondary air flow path between the air duct and the cylindrical portion of the wind box, a rear end portion of the flow path forming body, and the fuel supply The combustion apparatus for furnace heating according to claim 2, wherein the combustion apparatus is provided with a flame holding plate disposed between the tubular body and the air passage hole for taking in primary air. A cylindrical burner support body on which the burner is movably fitted in its longitudinal direction is provided on the back wall portion of the wind box, and the positioning state for positioning the burner with respect to the burner support body and the positioning are released. A positioning body that can be switched to a release state is provided.
The burner support means is means for supporting the burner by the burner support body so as to be movable in the longitudinal direction, and positioning the movement of the burner in the longitudinal direction by the positioning body. A combustion apparatus for furnace heating as described in any one of the above.   The combustion for furnace heating according to any one of claims 1 to 4, further comprising preheating means for preheating the combustion air supplied from the combustion air supply means with exhaust gas discharged from the inside of the furnace. apparatus.

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