JP5892809B2 - Combustion equipment for heating furnace - Google Patents

Description

The present invention is provided with an oxygen-containing gas supply port that is formed in a horizontally long shape on the side wall of the furnace and supplies the combustion oxygen-containing gas in a wide flowing state toward the combustion region above the object to be heated in the heating furnace. And
The present invention relates to a combustion apparatus for a heating furnace in which a gas fuel injection portion for injecting gas fuel into the combustion zone is provided at a location below the oxygen-containing gas supply port on the furnace side wall.

  Such a combustion apparatus for a heating furnace is used to heat various heating furnaces such as a melting furnace that melts a melting object such as glass or metal, or a heating furnace that heats a heating object such as a forged product. It is.

  In a combustion apparatus for a heating furnace, it is desired to heat the inside of the furnace in a state in which the temperature distribution is made uniform, and in the case where the temperature distribution in the furnace is made uniform in that way, the gas fuel jet part is Thus, it is necessary to configure the fuel gas to be ejected so as to form a flame that extends along the width direction of the combustion zone above the object to be heated.

  As a first conventional example of a combustion apparatus for a heating furnace, a plurality of gas fuel injection nozzles are separately installed on the side wall of the furnace in a state of being dispersed along the lateral width direction of the combustion zone as a gas fuel injection portion. (For example, refer to Patent Document 1).

  In addition, as a second conventional example of a combustion apparatus for a heating furnace, gas fuel is ejected radially in a plan view so as to form a fan-shaped flame that extends along the width direction of the combustion zone as a gas fuel ejection section. Some gas fuel injection nozzles are provided on the furnace side wall (see, for example, Patent Document 2).

JP 2001-201262 A JP 2004-301369 A

  A combustion apparatus for a heating furnace according to a first conventional example ejects gas fuel from a plurality of gas fuel ejection nozzles that are dispersed and positioned along the lateral width direction of the combustion area above the object to be heated. Although it is possible to form a flame that spreads along the width direction of the gas well, a plurality of gas fuel injection nozzles are individually installed on the furnace side wall, so installation work of the plurality of gas fuel injection nozzles is complicated. There is inconvenience to work.

  Since the combustion apparatus for a heating furnace of the second conventional example is provided with gas fuel injection nozzles for jetting gas fuel radially in a plan view, the number of gas fuel injection nozzles is reduced. Although the nozzle installation operation can be simplified, there is a disadvantage that it is difficult to uniformly heat the entire object to be heated because it forms a fan-shaped flame extending along the lateral width direction of the combustion zone.

  That is, the fan-shaped flame that spreads along the width direction of the combustion zone spreads sufficiently along the width direction of the combustion zone at the tip side, but along the width direction of the fuel zone at the root side. Since the spread range is narrow, it is difficult to appropriately heat the object to be heated on the base side of the flame.

  The present invention has been made in view of the above circumstances, and the purpose thereof is a combustion apparatus for a heating furnace capable of simplifying installation work while being able to uniformly heat the entire heating object. Is to provide

The combustion apparatus for a heating furnace according to the present invention is formed in a horizontally long shape on the side wall of the furnace, and supplies the oxygen-containing gas for combustion in a fluid state that is wide toward the combustion zone above the object to be heated in the heating furnace. An oxygen-containing gas supply port is provided;
A gas fuel injection portion for injecting gaseous fuel into the combustion zone is provided at a location below the oxygen-containing gas supply port on the furnace side wall, and the first characteristic configuration is as follows:
As the gas fuel ejection portion, a burner tile in which a plurality of fuel ejection ports are formed in a state of being dispersed over the entire width in the lateral width direction is provided on the furnace side wall.

  That is, since the burner tile formed with a plurality of fuel injection ports in a state of being distributed over the entire width along the horizontal width direction is installed on the furnace side wall as the gas fuel injection portion, the horizontal width of the burner tile is sufficient. By forming it large, the plurality of fuel injection ports can be positioned in a state of being distributed over a large width along the lateral width direction of the combustion zone.

  Therefore, by ejecting gaseous fuel from a plurality of fuel jets, a flame that spreads sufficiently along the lateral width direction of the combustion region above the object to be heated can be formed, and the jets from the plurality of fuel jets can be formed. Since the flame formed by the gas fuel spreads along the lateral width direction of the combustion zone even at the base side portion, the entire heating object is easily heated uniformly.

  In addition, since the plurality of fuel jets located in a state of being dispersed along the width direction of the combustion zone are formed in the burner tile, a plurality of fuel injection ports are formed by simple installation work for installing the burner tile on the furnace side wall. A combustion jet can be provided on the furnace side wall.

  In short, according to the first characteristic configuration of the present invention, it is possible to provide a combustion apparatus for a heating furnace capable of simplifying the installation work while being able to uniformly heat the entire heating object.

In addition to the first feature configuration, the second feature configuration of the present invention includes:
As the plurality of fuel ejection ports, a plurality of upper portions formed in a state of being aligned in the lateral width direction of the burner tile on the center side in the lateral width direction of the burner tile and on the upper and lower sides in the vertical width direction of the burner tile. There are provided a spout and a plurality of lower spouts, and an intermediate spout formed at the center in the vertical width direction of the burner tile,
As the intermediate spout, a plurality of left spouts and a plurality of right spouts formed in a state of being arranged in the width direction of the burner tile in each of the left and right portions of the burner tile in the width direction And
A distribution rate adjusting means for changing and adjusting a distribution rate of gas fuel distributed and ejected from the upper jet port, the lower jet port, and the intermediate jet port is provided.

  That is, the distribution state of the flame can be adjusted by changing and adjusting the distribution rate of the gas fuel ejected from the upper jet port, the lower jet port, and the intermediate jet port by the distribution rate adjusting means.

For example, if most or all of the gas fuel supplied to the gas fuel injection portion is adjusted to a distribution ratio that is jetted from the upper jet port and the intermediate jet port, a plurality of left jet ports, a plurality of upper jet ports Since most or all of the gas fuel is ejected from the ejection port and the plurality of right-side ejection ports, a flame spreading along the width direction of the combustion area above the object to be heated is formed on the upper side. can do.
Further, if most or all of the gas fuel supplied to the gas fuel jet part is adjusted to a distribution ratio jetted from the lower jet port and the intermediate jet port, a plurality of left jet ports, a plurality of lower jet ports Since most or all of the gas fuel is ejected from the ejection port and the plurality of right-side ejection ports, a flame that extends along the width direction of the combustion area above the object to be heated is formed on the lower side. can do.

  That is, for example, in the case where the glass melting furnace as a heating furnace melts the glass raw material supplied from the raw material supply port to the glass melting tank while flowing from the raw material supply side toward the molten glass extraction side, In the raw material supply side portion in the flow direction, the flame can be formed closer to the upper side, and in the molten glass take-out side portion in the flow direction of the glass raw material, the flame can be formed from the lower side.

  In addition, the part on the raw material supply side of the upper surface of the glass melting tank is uneven because the massive glass raw material floats, so that the flame does not hit the glass raw material, Since the glass raw material is melted and flat on the upper surface of the glass melting tank, it is desirable to form a flame in order to efficiently heat the upper surface of the glass melting tank. Although it is desired to form from below, it is possible to form a flame in a state according to the request.

  In order to efficiently heat the upper surface of the glass melting tank, even if the flame is formed from below, if the glass raw material is colorless glass, the vicinity of the upper surface of the melted glass raw material in the glass melting tank is oxidized. In order to create an atmosphere, a flame is formed at a position away from the upper surface of the melted glass raw material, and when the glass raw material is colored glass, the vicinity of the upper surface of the melted glass raw material in the glass melting tank is changed to a reducing atmosphere. Therefore, it is desirable to form a flame at a position close to the upper surface of the melted glass raw material, but the distribution ratio of the gas fuel ejected from the upper jet port, the lower jet port, and the intermediate jet port By changing and adjusting, a desired flame can be formed.

  In short, according to the second characteristic configuration of the present invention, in addition to the operational effects of the first characteristic configuration, it is possible to provide a combustion apparatus for a heating furnace that can adjust the formation state of a flame.

The third feature configuration of the present invention is in addition to the second feature configuration,
The intermediate jet port is characterized in that a central jet port formed at the center of the burner tile in the lateral width direction is provided.

  That is, as the intermediate spout, in addition to the plurality of left spouts and the plurality of right spouts, a central spout formed at the center in the width direction of the burner tile is provided. Due to the presence of the gas fuel to be ejected, the gas fuels ejected from the plurality of left jet ports, the plurality of upper jet ports, the plurality of lower jet ports, and the plurality of right jet ports become an integrated flame. And stable and easy to burn.

  That is, in the case where most or all of the gas fuel supplied to the gas fuel ejection portion is ejected from the upper ejection port and the intermediate ejection port to form a flame closer to the upper side, a plurality of left ejection ports Gas fuel ejected from a plurality of upper jet nozzles and a plurality of right jet nozzles is easily burned stably as an integrated flame due to the presence of gas fuel jetted from an intermediate jet nozzle It becomes.

  Similarly, in the case where most or all of the gas fuel supplied to the gas fuel ejection portion is ejected from the lower ejection port and the intermediate ejection port and the flame is formed closer to the lower side, a plurality of left injections The gas fuel ejected from the outlet, the plurality of lower jet nozzles, and the plurality of right jet nozzles is easily burned stably as an integrated flame due to the presence of the gas fuel ejected from the intermediate nozzle. It will be a thing.

  In short, according to the third characteristic configuration of the present invention, it is possible to provide a combustion apparatus for a heating furnace capable of achieving stable combustion in addition to the operational effects of the second characteristic configuration.

The fourth feature configuration of the present invention is in addition to the third feature configuration,
The upper jet port, the lower jet port, and the intermediate jet port are configured to jet in a direction in which fuel gas is focused.

  That is, since the upper jet port, the lower jet port, and the intermediate jet port are jetted in the direction in which the fuel gas is converged, the gas fuel jetted from the upper jet port and the intermediate jet port is an integrated flame. Combustion, and gas fuel jetted from the lower jet port and the intermediate jet port can be accurately burned as an integrated flame, further improving stable combustion it can.

  That is, in the case where most or all of the gas fuel supplied to the gas fuel ejection portion is ejected from the upper ejection port and the intermediate ejection port to form a flame closer to the upper side, a plurality of left ejection ports The gas fuel ejected from the plurality of upper ejection ports, the plurality of rightward ejection ports, and the intermediate ejection port can be accurately burned as an integrated flame.

  Similarly, in the case where most or all of the gas fuel supplied to the gas fuel ejection portion is ejected from the lower ejection port and the intermediate ejection port and the flame is formed closer to the lower side, a plurality of left injections The gas fuel ejected from the outlet, the plurality of lower nozzles, the plurality of right nozzles, and the intermediate nozzle can be accurately burned as an integrated flame.

  In short, according to the fourth characteristic configuration of the present invention, it is possible to provide a combustion apparatus for a heating furnace that can further improve the stable combustion in addition to the operational effects of the third characteristic configuration.

In addition to the second or third characteristic configuration described above, the fifth characteristic configuration of the present invention includes:
The upper jet port, the lower jet port, and the intermediate jet port are configured such that the jet direction of the gas fuel can be changed and adjusted.

  That is, by changing the ejection direction of the gas fuel ejected from the upper ejection port, the lower ejection port, and the intermediate ejection port, flames having various shapes can be formed according to installation conditions and the like.

  That is, for example, the jet direction of the gas fuel ejected from the upper jet port, the lower jet port, and the intermediate jet port is changed up and down to form a flame extending obliquely upward or a flame extending obliquely downward. It is also possible to change the jet direction of the gas fuel ejected from the upper jet port, the lower jet port, and the intermediate jet port to the left and right so that the flame extending to the left and the flame extending to the right Various flames can be formed, such as being able to form.

  In short, according to the fifth characteristic configuration of the present invention, in addition to the operational effects of the second or third characteristic configuration, it is possible to provide a combustion apparatus for a heating furnace that can form flames of various shapes.

In addition to any of the first to fifth feature configurations described above, the sixth feature configuration of the present invention includes:
A plurality of the burner tiles are juxtaposed along the width direction of the oxygen-containing gas supply port with respect to one of the oxygen-containing gas supply ports.

  That is, a plurality of burner tiles are juxtaposed along the lateral width direction of the oxygen-containing gas supply port with respect to one of the oxygen-containing gas supply ports. In this case, the burner tile can be easily manufactured and the installation work can be facilitated.

  In other words, the oxygen-containing gas supply port may be provided with a large lateral width so as to supply the oxygen-containing gas in a wide state. In such a case, a lateral width equivalent to the lateral width of the oxygen-containing gas supply port is provided. Although it is conceivable to manufacture and install a burner tile having the above, in this case, the work of manufacturing a large burner tile is disadvantageous, and the operation of installing a large burner tile is a complicated work There are disadvantages.

  On the other hand, according to the sixth characteristic configuration, a burner tile having a size that is easy to manufacture and easy to install is manufactured, and a plurality of burner tiles are attached to one of the oxygen-containing gas supply ports. Since they can be arranged side by side, it is possible to facilitate the production of the burner tile and the installation work.

  In short, according to the sixth feature configuration of the present invention, in addition to the operational effects of any of the first to fifth feature configurations, it is possible to facilitate the manufacture of the burner tile and the installation work. A combustion apparatus for a heating furnace can be provided.

Longitudinal front view of the glass melting furnace of the first embodiment II-II arrow view of FIG. Vertical front view of the glass melting furnace of the same embodiment Front view of the same section Front view of the combustion apparatus of the first embodiment Burner tile partially cutaway side view Partial cutaway plan view of burner tile Schematic diagram showing gas fuel supply configuration Longitudinal rear view of the glass melting furnace of the second embodiment XX arrow view of FIG. Front view of combustion apparatus of second embodiment Partially cutaway plan view of another embodiment

[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, a glass melting furnace as a heating furnace includes a rectangular glass melting tank 2 in a plan view at a lower portion of a furnace body 1 having a ceiling formed in an arch shape. 4, the front side wall 4F, the rear side wall 4R, and the left and right lateral side walls 4S are provided in a partitioned state, and the front side wall 4F is formed with an inlet 4i for charging a glass raw material as a heating object, On the rear side wall 4R, an outlet 4e for taking out the molten glass from the glass melting tank 2 is formed, and a work tank 3 communicating with the glass melting tank 2 is provided at the outlet 4e. Six combustion apparatuses N for burning fuel are provided.

The glass melting furnace causes the glass raw material charged from the charging port 4i to flow toward the work tank 3 while being melted in the glass melting tank 2, and guides the clean molten glass to the work tank 3 through the outlet 4e. It is configured as follows.
Incidentally, FIG. 1 is a longitudinal sectional view of a portion adjacent to the inlet 4i in the flow direction of the glass raw material, and FIG. 3 is an intermediate portion between the inlet 4i and the outlet 4e in the flow direction of the glass raw material. FIG. 4 is a longitudinal sectional view of a portion adjacent to the outlet 4e in the flow direction of the glass raw material.

  The six combustion devices N are installed in a state where three are distributed to each of the left and right lateral sidewalls 4S, and the three combustion devices N on the left side and the three combustion devices N on the right side are set for a set time. It is comprised so that it may burn alternately every (for example, 15 minutes-30 minutes).

A heat storage chamber T extending in the longitudinal direction of the melting tank is provided in each of the left and right lateral outer portions of the furnace body 1, and the combustion device N passes through the heat storage chamber T and has a high temperature (1000 to 1200 ° C.) as will be described later. The gas fuel is combusted by the combustion air A preheated to a high temperature.
The heat storage chamber T is configured to store the heat held by the exhaust gas E when the exhaust gas E after combustion by the combustion device N passes therethrough.

  As shown in FIGS. 1, 2, and 5, the combustion apparatus N includes an oxygen-containing gas supply unit that supplies combustion air A as an oxygen-containing gas toward a combustion zone above the glass raw material in the glass melting furnace. K and a gas fuel ejection portion W that ejects gas fuel into the combustion zone.

The oxygen-containing gas supply unit K has an air port 5 as an oxygen-containing gas supply port formed in a horizontally long shape on the side wall 4 </ b> S as the furnace side wall 4, and an air supply path 6 that connects the heat storage chamber T and the air port 5. As described above, the combustion air A that has been preheated to a high temperature after passing through the heat storage chamber T is supplied through the air port 5 in a fluid state that is wide toward the combustion zone. Yes.
The supply speed of the combustion air A is, for example, 8 to 15 m / S.

As shown in FIG. 5, the cross-sectional shape of the air supply path 6 and the shape of the air port 5 at the tip of the air supply path 6 are formed such that the lower edge is linear and the upper edge is curved upward to connect both ends of the lower edge. It is a crumbly shaped.
Incidentally, the lower edge portion of the air supply path 6 is inclined downward by 10 degrees with respect to the horizontal direction in a side view, and the top portion of the upper edge of the air supply path 6 is horizontal in the side view. In this case, the combustion air flows downward toward the combustion zone.

As shown in FIG. 1, the air in the blower S is supplied to one of the left and right heat storage chambers T, and the exhaust gas E discharged from the other heat storage chamber T is discharged to the outside. A flow path switching mechanism U for switching to a state in which the exhaust gas E supplied to the other of the chambers T and discharged from the one heat storage chamber T is discharged to the outside is provided.
By switching between the state where the combustion air A is supplied to the left combustion device N and the state where the combustion air A is supplied to the right combustion device N by the flow path switching mechanism U, as described above, It is configured to switch between a state in which the left combustion device N is combusted and a state in which the right combustion device N is combusted.

  The gas fuel ejection part W will be described. As shown in FIGS. 2 and 5, as the gas fuel ejection part W, a burner in which a plurality of gas fuel ejection openings 7 are formed in a state of being dispersed over the entire width in the lateral width direction. A tile 8 is installed on the lateral side wall 4S as the furnace side wall 4.

Specifically, in this embodiment, three burner tiles 8 are juxtaposed with respect to one air port 5 along a direction corresponding to the lateral width direction of the combustion zone.
Incidentally, the lateral width L1 along the lateral width direction of the combustion region of the air port 5 is, for example, 1.5 to 2 m, and the lateral width L2 along the lateral width direction of the combustion region of the burner tile 8 is, for example, 400 mm, The vertical width along the vertical direction of the burner tile is, for example, 350 mm.
The width L1 of the air opening and the width L2 of the burner tile 8 are such that the product of L2 and the number of burner tiles 8 divided by L1 is 0.6 or more and 1.0 or less. It will be determined to be.

As shown in FIG. 5, a plurality of gas fuel outlets 7 formed in the burner tile 8 are arranged in the width direction at the center side in the width direction of the burner tile 8 and at the upper and lower portions in the vertical width direction of the burner tile. A plurality of upper jet nozzles 7 u and a plurality of lower jet nozzles 7 s formed in a lined state, and an intermediate jet nozzle 7 t formed at the center in the vertical width direction of the burner tile 8 are provided.
Incidentally, in the present embodiment, five upper jet outlets 7u and lower jet outlets 7s are formed.

Then, as the intermediate spout 7t, a plurality of left spouts 7h and a plurality of right spouts formed in a state of being aligned in the lateral width direction of the burner tile 8 in each of the left side portion and the right side portion of the burner tile 8 in the lateral width direction. A side jet outlet 7m and a central jet outlet 7c formed at the center of the burner tile 8 in the lateral width direction are provided.
Incidentally, in the present embodiment, three left jets 7h and right jets 7m are formed, and one central jet 7c is formed.

  Further, a distribution rate adjusting means V (see FIG. 8) for changing and adjusting the distribution rate of the gas fuel distributed and ejected from the upper jet port 7u, the lower jet port 7s, and the intermediate jet port 7t is provided, which will be described later. As described above, the flame formation state can be changed.

When the burner tile 8 is described and the upper jet port 7u, the lower jet port 7s, and the intermediate jet port 7t are further described, the outer shape of the burner tile 8 is formed in a rectangular parallelepiped shape (see FIG. 8).
As shown in FIG. 6, the burner tile 8 includes a gas fuel flow hole Gu that forms an upper jet port 7 u at the tip portion, a gas fuel flow hole Gs that forms a lower jet port 7 s at the tip portion, and an intermediate jet port. A gas fuel flow hole Gt forming 7t is provided.

Although not shown, five gas fuel flow holes Gu forming the upper jetting port 7u at the tip end are formed along the lateral width direction of the burner tile 8, and similarly, the lower jetting port 7s is set at the tip end. Although not shown, five gas fuel flow holes Gs are formed along the horizontal width direction of the burner tile 8.
In addition, as shown in FIG. 7, seven gas fuel flow holes Gt forming the intermediate injection port 7 t are formed along the horizontal width direction of the burner tile 8.

As shown in FIG. 6, five gas fuel flow holes Gu communicating with each of the five upper ejection ports 7u are formed so as to be inclined downward, and communicated with each of the five lower ejection ports 7s. The gas fuel flow holes Gs are formed so as to be inclined upward, so that the gas fuel ejected from the five upper ejection ports 7u and the five lower ejection ports 7s flows toward the converging point D. It is configured.
In addition, as shown in FIG. 6, the gas fuel flow hole Gt that forms the intermediate jet port 7t at the tip is formed in a posture along the horizontal direction in a side view.

  Incidentally, in the present embodiment, the five gas fuel flow holes Gu communicating with each of the five upper injection ports 7u are in the discharge direction of the combustion air A discharged from the air port 5 in plan view. The gas fuel flow holes Gu on the left and right sides of the five gas fuel flow holes Au are inclined so that the gas fuel flows toward the converging point D even in a plan view. You may form in.

  Similarly, in the present embodiment, the five gas fuel flow holes Gs communicating with each of the five lower jet nozzles 7s have a discharge direction of the combustion air A discharged from the air port 5 in a plan view. In the plan view, the gas fuel flow holes Gs on both the left and right sides of the five gas fuel flow holes Gs are inclined so that the gas fuel flows toward the converging portion D even in a plan view. May be formed in posture

  As shown in FIG. 7, the gas fuel flow holes Gt communicating with the three left outlets 7h among the intermediate outlets 7t are formed so as to be inclined to the right side as viewed from the top in a plan view. A gas fuel flow hole Gt communicating with each of the three right outlets 7m of the intermediate outlet 7t is formed so as to be inclined to the left side toward the distal end in plan view. A gas fuel flow hole Gt communicating with the central jet port 7c is formed in a posture along the discharge direction of the combustion air A discharged from the air port 5 in a plan view, and jetted from the seven intermediate jet ports 7t. The gas fuel is configured to flow toward the convergence point D described above.

That is, in the present embodiment, the upper jet port 7u, the lower jet port 7s, and the intermediate jet port 7t are configured to jet in the direction in which the gas fuel is focused, and the flame is longer than necessary. It is designed to shorten the flame.
Incidentally, in the present embodiment, the above-mentioned converging point D is set at a position of 0.5 to 1.0 m from the burner tile 8.

In the present embodiment, the angle K1 at which the gas fuel jet direction of the upper jet port 7u intersects the gas fuel jet direction of the lower jet port 7s is set to 25 degrees, and the left of the intermediate jet port 7t An angle K2 at which the gas fuel ejection direction of the ejection port 7h intersects the gas fuel ejection direction of the right ejection port 7m is set to 25 degrees.
Incidentally, in FIG. 6 and FIG. 7, in order to make the gas fuel ejection direction easy to understand, the relationship is different from the above setting relationship.

As shown in FIG. 6 and FIG. 7, a supply port assembly portion 9 for supplying gas fuel is provided at the rear portion of the burner tile 8 via a connection portion 10.
The supply port assembly portion 9 includes a rectangular plate body 9A, and an upper fuel supply port 11u for supplying gas fuel to the gas fuel flow hole Gu communicating with the upper jet port 7u. The lower fuel supply port 11s for supplying gas fuel to the gas fuel flow hole Gs communicating with the lower jet port 7s, and the intermediate fuel for supplying gas fuel to the gas fuel flow hole Gt communicating with the intermediate jet port 7t It is comprised in the form provided with the supply port 11t.

  Although not shown in the drawing, the connecting part 10 has five gas fuels supplied to the lower fuel supply port 11s, a flow path for guiding the gas fuel supplied to the upper fuel supply port 11u to the five gas fuel flow holes Gu. A flow path leading to the gas fuel flow holes Gu, and a flow path leading the gas fuel supplied to the intermediate fuel supply port 11t to the seven gas fuel flow holes Gt. The plate body 9A is bolted and connected to the rear end of the burner tile 8 by bonding or the like, so that the burner tile 8 and the supply port assembly portion 9 are connected.

  As is clear from the above description, in the present embodiment, the burner tile 8 configured as described above has the front side facing the inside of the furnace body 1 and the side wall 4S of the furnace body 1. Will be provided.

As shown in FIG. 8, a fuel supply path 12 for supplying gas fuel such as city gas (for example, 13A) is branched into eight burner tile fuel branch paths 12n, and each burner tile fuel branch path 12n is Furthermore, it branches into the upper branch path 12u, the lower branch path 12s, and the intermediate branch path 12t.
The upper branch 12u, the lower branch 12s, and the middle branch 12t of each burner tile fuel branch 12n are respectively connected to the upper fuel supply port 11u, the lower fuel supply port 11s, and the middle of each burner tile 8. It is connected to the fuel supply port 11t.

  The fuel supply passage 12 is provided with a fuel intermittent valve 13 for intermittently supplying the gas fuel, and each burner tile fuel branch 12 n has a burner tile fuel adjustment for adjusting the amount of gas fuel supplied to the burner tile 8. A valve 14 is provided.

The upper branch passage 12u is provided with an upper fuel control valve 15u that adjusts the amount of gas fuel supplied to the five upper outlets 7u, and the lower branch passage 12s has five lower jets. A lower fuel adjustment valve 15s for adjusting the amount of gas fuel supplied to the outlet 7s is provided, and further, an intermediate for adjusting the amount of gas fuel supplied to the seven intermediate injection ports 7t is provided in the intermediate branch passage 12t. A fuel control valve 15t is provided.
That is, in the present embodiment, the above-described distribution rate adjusting means V is configured by the upper fuel adjustment valve 15u, the lower fuel adjustment valve 15s, and the intermediate fuel adjustment valve 15t.

As shown in FIG. 8, in the present embodiment, an operation control unit 20 that controls the operation of the six combustion devices N and an operation unit 21 that instructs the operation control unit 20 to give various control commands are provided. ing.
Although not shown in the operation unit 21, in addition to the operation switch for instructing the start and stop of the operation of the combustion device N, the flame formation state corresponding to each of the six combustion devices N is changed to the upper side flame. A flame formation state command switch or the like for selectively instructing one of the formation state, the short flame formation state, and the lower side flame formation state is provided.

In the upper side flame formation state, the gas fuel supplied to the burner tile 8 is set in advance so that most of the gas fuel is ejected from the five upper jet ports 7u. For example, at 80: 20: 0), it is a state in which it is distributed and ejected from five upper jet outlets 7u, seven intermediate jet outlets 7t, and five lower jet outlets 7s.
In the upward flame formation state, as shown in FIG. 1, the flame is formed in a state extending obliquely upward from the burner tile 8.

In the short flame formation state, the short flame formation set in advance is performed so that most of the gas fuel supplied to the burner tile 8 is ejected from the five upper ejection ports 7u and the five lower ejection ports 7s. This is a state of being distributed and ejected from the five upper jetting ports 7u, the seven intermediate jetting ports 7t, and the five lower jetting ports 7s at the set distribution ratio (for example, 40:20:40).
And in a short flame formation state, as shown in FIG. 3, a flame is formed in the state extended toward the horizontal direction from the burner tile 8. As shown in FIG.

In the lower side flame formation state, the gas fuel supplied to the burner tile 8 is set in advance so that most of the gas fuel is ejected from the five lower jet ports 7s. For example, at 0:20:80), it is a state in which it is distributed and ejected from five upper ejection ports 7u, seven intermediate ejection ports 7t, and five lower ejection ports 7s.
And in a downward flame formation state, as shown in FIG. 4, a flame is formed in the state extended from the burner tile 8 toward diagonally downward.

  As described above, the flame formation state is changed to the upper side flame formation state, the short flame formation state, and the lower side flame formation state. In any state, as shown in FIG. A flame having a large width that is the same as the horizontal width is formed.

  As shown in FIG. 1, the portion on the upper side of the glass raw material flow direction in the glass melting tank 2 floats while the glass raw material is melted. As shown in FIG. 4, the glass raw material flow direction downstream side has almost flattened the upper surface of the glass melting tank 2 because most of the glass raw material is melted up to that portion and the glass raw material is not floating. is there.

  Therefore, the flame formation state in each of the six combustion devices N provided on the left and right lateral side walls 4S of the furnace body 1 is set to the first closest to the inlet 4i by the flame formation state command switch of the operation unit 21. The combustion device N is set to the upper side flame formation state, the second combustion device N next to the input port 4i is set to the short flame formation state, and the third combustion device N far from the input port 4i is set to the lower side flame formation state. Set.

  By setting the formation state of the flame in this way, the flame in a state of extending from the burner tile 8 obliquely upward as shown in FIG. 1 in the upper part of the glass raw material flow direction in the glass melting tank 2. Therefore, it is possible to prevent a flame from hitting the glass raw material floating in the glass melting tank 2.

  Further, as shown in FIG. 3, a flame extending in the horizontal direction from the burner tile 8 is formed in the middle part of the glass raw material flow direction in the glass melting tank 2, so that the glass raw material floating in the glass melting tank 2 is formed. Even if it remains, the flame can be brought close to the upper surface of the glass melting tank 2 and the glass melting tank 2 can be efficiently heated while suppressing the flame from hitting the glass raw material.

  Furthermore, as shown in FIG. 4, a flame extending obliquely downward from the burner tile 8 is formed at the downstream side of the glass raw material flow direction in the glass melting tank 2. The glass melting tank 2 can be efficiently heated close to the upper surface of 2.

  As described above, the flame formation height can be changed and adjusted in a state where the burner tile 8 is attached to the horizontal side wall 4S of the furnace body 1, so that the three burner tiles 8 are connected to the side wall of the furnace body 1. When installing in 4S, the complicated operation | work which changes and installs the installation height of each burner tile 8 according to the position in a glass raw material flow direction becomes unnecessary, and as mentioned above, each burner tile 8 is installed. All can be provided at the same height, and the installation work of the combustion apparatus N can be simplified.

Hereinafter, the control operation of the operation control unit 20 will be described.
When the operation start is instructed by the operation switch of the operation unit 21, the operation control unit 20 opens the fuel intermittent valve 13 in a state where the igniter (not shown) provided for each burner tile 8 is operated. Then, the operation of the burner tile fuel control valve 14 of each burner tile fuel branch 12n is controlled so that the supply amount of gas fuel to each burner tile 8 becomes a preset set fuel supply amount. The operation of the device N is started.

  Incidentally, since the six combustion devices N are alternately burned three by three as described above, when the start of operation is commanded by the operation switch of the operation unit 21, the three combustion devices N that start the combustion first are used. In order to supply the combustion air A to the burner tile 8 corresponding to the combustion device N, the flow path switching mechanism U is switched, and the burner tile 8 corresponding to the three combustion devices N that start combustion first is used. The gas fuel is supplied to the burner tiles 8 in a state where an igniter (not shown) provided for the burner tiles is operated.

Further, the operation control unit 20 determines the upper fuel control valve 15 u corresponding to each burner tile 8 based on the command information of the main flame formation state for each burner tile 8 by the flame formation state command switch of the operation unit 21. The operation of each of the fuel control valve 15s and the intermediate fuel control valve 15t is controlled.
For example, when the upper side flame formation state is instructed, the gas fuel supplied through the burner tile fuel branch 12n is supplied to the upper branch 12u and the intermediate at the set distribution rate for the upper side flame formation. The operations of the upper fuel adjustment valve 15u, the intermediate fuel adjustment valve 15t, and the lower fuel adjustment valve 15s are controlled so as to be distributed to the branch passage 12t and the lower branch passage 12s.

  When the operation stop is instructed by the operation switch of the operation unit 21, the operation control unit 20 closes the fuel intermittent valve 13 and the oxygen intermittent valve 18 and stops the operation of the combustion device N.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. This second embodiment exemplifies a different configuration of the glass melting furnace, and the combustion apparatus N of the second embodiment is a first embodiment. In the following, the configuration of the glass melting furnace and the parts different from the first embodiment of the combustion apparatus N will be described in detail, and the same as in the first embodiment. Constituent parts are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted.

As shown in FIGS. 9 and 10, the glass melting furnace of the second embodiment is a pair of four furnace side walls 4 surrounding the four sides of the rectangular glass melting tank 2 in plan view, which are on the long side. An inlet 4i is provided at a location close to the front side wall 4F in one of the lateral side walls 4S, and a side of the front side wall 4F and the rear side wall 4R on the short side adjacent to the side wall 4S that is away from the inlet port 4i. An outlet 4e is provided in the rear side wall 4R.
That is, this glass melting furnace is configured to flow the glass raw material in a bent shape from the inlet 4i toward the outlet 4e.

And as shown in FIG. 11, the two combustion apparatuses N are juxtaposed on the front side wall 4F adjacent to the inlet 4i among the front side wall 4F and the rear side wall 4R which become the short side mentioned above.
The two combustion devices N are configured to burn alternately every set time (for example, 15 to 30 minutes).

  In the present embodiment, in the present embodiment, a pair of left and right air ports 5 are formed on the front side wall 4F so as to correspond to the two combustion devices N, and one burner tile 8 is provided for each air port 5. Is set.

  Incidentally, in the case of the second embodiment, for example, the flame forming state by the burner tile 8 on the side adjacent to the charging port 4i is set to the upper side flame forming state, and the burner tile 8 on the side far from the charging port 4i is set. The flame formation state due to is set to the downward flame formation state or the short flame formation state.

[Another embodiment]
Next, another embodiment will be described.
(A) In the first and second embodiments, the combustion apparatus N of the present invention is applied to a glass melting furnace. However, the combustion apparatus N of the present invention is used in various heating furnaces such as a forging furnace. Applicable.

(B) In the first and second embodiments, the case where the central jet 7c is provided as the intermediate jet 7t at the central portion in the horizontal width direction of the burner tile 8 is illustrated, but the central jet 7c is omitted. You may implement with a form.

(C) As illustrated in the first embodiment, when the burner tiles 8 are juxtaposed along the glass raw material flow direction in the glass melting tank 2, the juxtaposition number depends on the size of the glass melting tank 2 in plan view. Can be changed. Moreover, when the magnitude | size in planar view of the glass dissolution tank 2 is small, one may be sufficient.

(D) The type of flame formation state is not limited to the type exemplified in the first embodiment.
For example, the distribution ratio between the left jet port 7h and the right jet port 7m at the intermediate jet port 7t is changed and adjusted. For example, in the upper flame formation state or the lower flame formation state, the left jet The ejection amount from the outlet 7h is made larger than the ejection amount from the right ejection port 7m, and the upper left side flame formation state in which the flame is formed to extend leftward and upward, or the flame is elongated leftward and downward. It can be set as the lower left side flame formation state formed in a state.

  Similarly, in the upper flame formation state and the lower flame formation state, the amount of ejection from the right ejection port 7m is made larger than the ejection amount from the left ejection port 7h, and the flame extends rightward and upward. It is possible to form in a right upper side flame forming state formed on the right side or a right lower side flame forming state in which the flame is formed to extend rightward and downward.

(E) In the combustion apparatus N of the first embodiment, the upper jet port 7u, the lower jet port 7s, and the intermediate jet port 7t are configured to jet in the direction in which the gas fuel is focused. However, the upper jet port 7u, the lower jet port 7s, and the intermediate jet port 7t may be configured to jet gas fuel along directions parallel to each other.
Furthermore, the upper jet port 7u, the lower jet port 7s, and the intermediate jet port 7t may be configured to be jetted in a direction in which the gas fuel is diffused in a plan view. In this case, a flame that is sufficiently larger than the width of the burner tile 8 can be formed.

(F) In carrying out the present invention, the upper jet port 7u, the lower jet port 7s and the intermediate jet port 7t may be configured so as to change and adjust the jet direction of the gas fuel.
That is, you may comprise so that the injection direction of the gas fuel of the upper jet nozzle 7u, the lower jet nozzle 7s, and the intermediate jet nozzle 7t can be changed and adjusted to an up-down direction or a left-right direction.
For example, as shown in FIG. 12, a gas flow pipe Pu that forms an upper jet port 7u at the tip, a gas flow pipe Ps that forms a lower jet port 7s at the tip, and a gas flow pipe Pt that forms an intermediate jet port 7t at the tip Is configured to be swingable in the vertical direction around the tip of the burner tile 8, so that the upper jet port 7u, the lower jet port 7s and the intermediate jet port 7t move the gas fuel jet direction up and down. It can be changed.

  Although not shown, a gas flow pipe Pu that forms the upper jet 7u at the tip, a gas flow pipe Ps that forms the lower jet 7s at the tip, and a gas flow pipe Pt that forms the intermediate jet 7t at the tip Is configured so as to be swingable and adjustable in the left-right direction around the tip of the burner tile 8, so that the upper jet port 7u, the lower jet port 7s and the intermediate jet port 7t have the gas fuel jet direction left and right. It can be changed.

  If the upper jet port 7u, the lower jet port 7s, and the intermediate jet port 7t are configured to change and adjust the jet direction of the gas fuel, the flame formation state can be changed variously. Accordingly, the flame formation state can be changed and set.

(G) As the oxygen-containing gas discharged by the oxygen-containing gas supply unit K, oxygen-enriched air having an oxygen concentration higher than that of air can be used in addition to the air exemplified in the above embodiment.

(H) As a glass melting furnace to which the combustion apparatus N of the present invention is applied, there are various types of glass melting furnaces in addition to the glass melting furnaces described in the first embodiment and the second embodiment. For example, you may make it provide the combustion apparatus N of this invention in the batch type glass melting furnace which melt | dissolves a glass raw material by a batch type.

4 Furnace side wall 5 Oxygen-containing gas supply port 7 Fuel outlet 7u Upper outlet 7s Lower outlet 7t Intermediate outlet 7h Left outlet 7m Right outlet 7c Central outlet 8 Burner tile V Distribution rate adjusting means W Fuel injection Part

Claims (6)

An oxygen-containing gas supply port that is formed in a horizontally long shape on the side wall of the furnace and supplies the combustion-containing oxygen-containing gas in a wide fluid state toward the combustion zone above the object to be heated in the heating furnace is provided,
A combustion apparatus for a heating furnace provided with a gas fuel injection portion for injecting gaseous fuel into the combustion zone at a location below the oxygen-containing gas supply port on the furnace side wall,
A combustion apparatus for a heating furnace in which a burner tile in which a plurality of fuel injection holes are formed in a state of being dispersed over the entire width in the width direction as the gas fuel injection part is installed on the furnace side wall. As the plurality of fuel ejection ports, a plurality of upper portions formed in a state of being aligned in the lateral width direction of the burner tile on the center side in the lateral width direction of the burner tile and on the upper and lower sides in the vertical width direction of the burner tile. There are provided a spout and a plurality of lower spouts, and an intermediate spout formed at the center in the vertical width direction of the burner tile,
As the intermediate spout, a plurality of left spouts and a plurality of right spouts formed in a state of being arranged in the width direction of the burner tile in each of the left and right portions of the burner tile in the width direction And
The heating furnace for a heating furnace according to claim 1, further comprising a distribution ratio adjusting means for changing and adjusting a distribution ratio of gas fuel distributed and ejected from the upper outlet, the lower outlet, and the intermediate outlet. Combustion device.   The combustion apparatus for a heating furnace according to claim 2, wherein a central jet port formed at a central portion in the lateral width direction of the burner tile is provided as the intermediate jet port.   The combustion apparatus for a heating furnace according to claim 2 or 3, wherein the upper jet port, the lower jet port, and the intermediate jet port are configured to jet in a direction in which fuel gas is focused.   The combustion apparatus for a heating furnace according to claim 2 or 3, wherein the upper jet port, the lower jet port, and the intermediate jet port are configured to be capable of changing and adjusting the jet direction of the gas fuel.   6. The burner tile according to claim 1, wherein a plurality of the burner tiles are arranged in parallel along a width direction of the oxygen-containing gas supply port with respect to one of the oxygen-containing gas supply ports. Combustion device for heating furnace.

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