TW201831829A - Regenerative burner device characterized by using the regenerator to recover the heat of the burned gas therein and heat the air used in combustion - Google Patents

Abstract

Disclosed is a regenerative burner device provided with a regenerator to recover the heat of the burned gas therein and heat the air used in combustion. The present regenerative burner device is characterized by having a main fuel pipe used to supply fuel and a plurality of air supply/discharge pipes arranged at the periphery of the main fuel pipe to supply air used in combustion and discharge the burned gas. In addition, the sub-fuel pipes used to supply fuel are individually installed in the proximity of each air supply/discharge pipe. Wherein, the main fuel pipe and the sub-fuel pipes can adjust the fuel supply amount.

Description

Regenerative burner device

FIELD OF THE INVENTION The present invention relates to an invention of a regenerative burner apparatus.

BACKGROUND OF THE INVENTION Conventionally, in a combustion apparatus such as a heating furnace or a combustion furnace, in order to save energy, a heat storage body is provided in a burner to recover heat of combustion gas combusted in the furnace and to heat the combustion air. Regenerative burner devices are well known. Further, as shown in Patent Documents 1 and 2, there is a combustion apparatus in which a burner for supplying fuel and combustion air is disposed in the center of the furnace introduction portion, and combustion air is supplied and discharged around the burner. The gas supply and exhaust pipes are used to form a main flame. Prior Technical Literature Patent Literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2007-024335. Patent Document 2: Japanese Patent Laid-Open No. 2010-127525

SUMMARY OF THE INVENTION Problems to be Solved by the Invention In these examples, a jet of combustion air from an exhaust pipe will form a long flame from a furnace introduction portion, and a furnace having a small internal space, particularly a furnace. In the furnace with a short depth from the inner introduction portion, the flame will hit the furnace wall, and there is a problem that it is difficult to obtain a large amount of heat.

Accordingly, in the present invention, it is an object of the invention to provide a regenerative burner device which can maintain the combustion amount of a conventional regenerative burner device and shorten the flame length. Means to solve the problem

The present invention relates to a regenerative burner device, comprising a heat storage body that recovers heat of combustion gas combusted in the furnace and heats combustion air, and the regenerative burner device is characterized by: a main fuel pipe for supplying fuel; and a plurality of supply and exhaust pipes disposed around the main fuel pipe to supply combustion air and discharge combustion gas, and each of the supply and exhaust pipes is provided with a supply separately The auxiliary fuel pipe of the fuel, the main fuel pipe and the auxiliary fuel pipe can adjust the fuel supply amount.

According to the above configuration, since the air supply and exhaust pipe is disposed around the main fuel pipe and the sub fuel pipe is provided in the vicinity of the air supply and exhaust pipe, the main fuel can be used as the fuel is injected into the air supply from each of the air supply and exhaust pipes. tube. Further, since the main fuel pipe and the sub fuel pipe can adjust the fuel supply amount, the main fuel pipe can be used in combination and the amount of combustion can be adjusted.

The present invention further preferably has the following constitution. (1) The first supply and exhaust pipe and the second supply and exhaust pipe are provided in the exhaust pipe, and the main fuel pipe is disposed in the furnace opening, and the first supply and exhaust pipe is disposed in the furnace. An opening of the second fuel pipe is provided in the vicinity of the opening of the first supply and exhaust pipe in the vicinity of the opening of the first supply and exhaust pipe between the opening and the opening of the second supply and exhaust pipe in the furnace. An opening of the third fuel pipe in the furnace is provided in the vicinity of the opening of the second air supply and exhaust pipe, and the regenerative burner device is configured to provide the main fuel pipe when the combustion air is supplied to the first supply and exhaust pipe. And the second fuel pipe supplies fuel, the second supply and exhaust pipe recovers waste heat, the third fuel pipe does not supply fuel, and the main fuel pipe and the main fuel pipe are configured when the combustion air is supplied to the second supply and exhaust pipe The third fuel pipe supplies fuel, the first supply and exhaust pipe recovers waste heat, and the second fuel pipe does not supply fuel. (2) In the above configuration (1), the maximum fuel supply amount of the main fuel pipe, the maximum fuel supply amount of the second fuel pipe, and the maximum fuel supply amount of the third fuel pipe are each obtained in the heat storage. The fuel supply amount of one-half-burn amount of the maximum combustion amount set by the burner device. (3) In the above configuration (1) or (2), the second fuel pipe is configured to be opened in the first supply and exhaust pipe, and to supply fuel into the first supply and exhaust pipe, the third The fuel pipe is configured to open in the second supply and exhaust pipe and to supply fuel into the second supply and exhaust pipe. (4) In the above configuration (1) or (2), the opening of the second fuel pipe is located on the opposite side of the opening of the main fuel pipe with respect to the opening of the first supply and exhaust pipe The opening of the third fuel pipe is located on the opposite side of the opening of the main fuel pipe with respect to the opening of the second supply and exhaust pipe. (5) A first air pipe is provided, and the first air pipe supplies combustion air into the main fuel pipe.

According to the above configuration (1), the fuel is supplied from the main fuel pipe, and the combustion air is alternately supplied between the first supply and exhaust pipe and the second supply and exhaust pipe, and is fitted to the second fuel pipe. Since fuel is alternately supplied between the third fuel pipes, fuel is supplied from two places of the main fuel pipe and the second fuel pipe to the air supply from the first fuel supply pipe, and the supply is from the second fuel supply pipe. The gas is supplied from two places of the main fuel pipe and the third fuel pipe, so that the formation of the flame is dispersed in two places, so that the shape of the flame becomes wide, so that the blowout can be prevented and the length of the flame can be shortened. Further, since the combustion air is mixed with the fuel and burned in the furnace, and then mixed with the fuel of the main fuel pipe and burned, the flame temperature can be lowered by dividing the time point of formation of the flame into two. As a result, the amount of NOx generated can be reduced.

According to the above configuration (2), the regenerative burner device can be obtained by separately setting the maximum fuel supply amount of the main fuel pipe, the maximum fuel supply amount of the second fuel pipe, and the maximum fuel supply amount of the third fuel pipe. The fuel supply amount of the half-burn amount, which is one of the set maximum combustion amounts, is comparable to that of the conventional maximum-combustion amount set in the conventional regenerative burner (for example, the same maximum combustion amount as the specification value in the catalogue or the like). Shorten the length of the flame and further stabilize the size of the flame.

According to the above configuration (3), since the flame is formed in the first supply and exhaust pipe and in the second supply and exhaust pipe, the flame state in the furnace can be further stabilized.

According to the above configuration (4), the mixing time of the fuel from the main fuel pipe and the combustion air is delayed with respect to the mixing timing of the fuel and the air from the second fuel pipe and the third fuel pipe, whereby the flame temperature can be made Lowering, the result is that the amount of NOx generated can be reduced. Moreover, it is easy to ensure the arrangement area of the second fuel pipe and the third fuel pipe, and it is easy to design the inclination angles of the second fuel pipe and the third fuel pipe to the furnace wall or the supply and exhaust pipe.

According to the above configuration (5), since the flame is formed in the main fuel pipe, the flame state in the furnace can be made more stable. Effect of the invention

In summary, according to the present invention, it is possible to provide a regenerative burner device which can maintain the combustion amount of the conventional regenerative burner device and shorten the flame length.

(Embodiment) FIG. 1 is a schematic cross-sectional schematic view of a regenerative burner device 10 according to an embodiment of the present invention. As shown in Fig. 1, the regenerative burner device 10 includes a main fuel pipe 1 and fuel supply, and two or more supply and exhaust pipes 21 and 22 disposed around the main fuel pipe 1, and are supplied with combustion air side by side. Put the combustion gas.

The main fuel pipe 1 is configured to supply fuel into the furnace interior S, and one end is connected to the furnace interior S. The supply and exhaust pipes 21 and 22 are configured to supply combustion air into the furnace interior S, and one end communicates with the furnace interior S. The main fuel pipe 1 is provided with a regulating valve 11, which switches the main fuel pipe 1 to adjust the fuel supply amount. The supply and exhaust pipes 21, 22 are inclined toward the furnace S so as to be close to the main fuel pipe 1. It is preferable that the exhaust pipes 21 and 22 are inclined at about 10 degrees in advance.

Further, a second fuel pipe 3 and a third fuel pipe 4 that supply fuel to the furnace S are provided. The second fuel pipe 3 is provided in the vicinity of the supply and exhaust pipe 21, and has an opening portion 31 facing the furnace interior S in the vicinity of the opening 21a of the furnace S in the supply and exhaust pipe 21. The second fuel pipe 3 is configured to supply fuel to the opening 21a of the exhaust pipe 21. The inner diameter of the second fuel pipe 3 is smaller than the inner diameter of the supply and exhaust pipe 21. The second fuel pipe 3 is provided with an adjustment valve 32 that switches the second fuel pipe 3 to adjust the fuel supply amount.

The third fuel pipe 4 is provided in the vicinity of the supply and exhaust pipe 22, and has an opening portion 41 facing the furnace interior S in the vicinity of the opening portion 22a of the furnace S in the supply and exhaust pipe 22. The third fuel pipe 4 is configured to supply fuel to the opening 22a of the exhaust pipe 22. The inner diameter of the third fuel pipe 4 is smaller than the inner diameter of the supply and exhaust pipe 22. The third fuel pipe 4 is provided with an adjustment valve 42 that switches the third fuel pipe 4 to adjust the fuel supply amount.

The other end of the supply and exhaust pipe 21 is in communication with the supply and exhaust chamber 211. The heat storage body 212 is disposed in the supply and exhaust chamber 211. Similarly, the other end of the supply and exhaust pipe 22 communicates with the supply and exhaust chamber 221. The heat storage body 222 is disposed in the supply and exhaust chamber 221 .

Fig. 2 is a schematic view of the regenerative burner device 10 as seen from the side S of the furnace. As shown in FIG. 2, the main fuel pipe 1 is disposed at the center, the supply and exhaust pipe 21 is disposed to the left of the main fuel pipe 1, and the supply and exhaust pipe 22 is disposed to the right of the main fuel pipe 1. The second fuel pipe 3 is disposed on the left side of the exhaust pipe 21, and the third fuel pipe 4 is disposed on the right side of the exhaust pipe 22. Further, the second fuel pipe 3, the supply and exhaust pipe 21, the main fuel pipe 1, the supply and exhaust pipe 22, and the third fuel pipe 4 are arranged in a line from the left to the right.

The distance L1 between the second fuel pipe 3 and the supply and exhaust pipe 21 is smaller than the distance L2 between the exhaust pipe 21 and the main fuel pipe 1. It is desirable that the distance L1 is less than half of the distance L2. Similarly, the distance L3 between the third fuel pipe 4 and the supply and exhaust pipe 22 is smaller than the distance L4 between the exhaust pipe 22 and the main fuel pipe 1. It is desirable that the distance L3 is less than half of the distance L4. Furthermore, the distance L1 is equal to the distance L3, and the distance L2 is equal to the distance L4.

As shown in FIG. 1, the supply and exhaust chamber 211 is connected to the air-to-exhaust gas switching device 61 through a pipe 51, and the supply and exhaust chamber 221 is also connected to the air-to-air switching device 61 through the pipe 52 in the same manner. The supply and exhaust chamber 211 and the pipe 51 are connected via the flange 213, and the supply and exhaust chamber 221 and the pipe 52 are connected via the flange 223. The piping 51 is provided with a regulating valve 511 that switches the piping 51 to adjust the amount of supply of combustion air, and the piping 52 is provided with an adjustment valve 521 that switches the piping 52 to adjust the combustion. Air supply. The air-to-exhaust gas switching device 61 is connected to the air supply pipe 62 and the exhaust gas discharge pipe 63, and includes a switching valve 61a that communicates the air supply pipe 62 with the pipe 51 or the pipe 52, and simultaneously causes the exhaust gas discharge pipe 63 and The piping 52 or the piping 51 is in communication. An air supply blower (not shown) for supplying combustion air is provided in the air supply pipe 62, and an exhaust fan (not shown) for exhausting the combustion exhaust gas is provided in the exhaust gas discharge pipe 63.

3 and 4 are views for explaining switching of the air-to-air switching device 61. In FIG. 3, the switching valve 61a of the air-to-exhaust gas switching device 61 causes the air supply pipe 62 to communicate with the pipe 51, and causes the exhaust gas discharge pipe 63 to communicate with the pipe 52. As a result, the combustion air from the air supply pipe 62 passes through the pipe 51, is heated by the heat storage body 212 of the supply and exhaust chamber 211, and is then ejected from the supply and exhaust pipe 21 into the furnace S. Further, the combustion exhaust gas from the furnace S passes through the supply and exhaust pipe 22 by the exhaust fan provided in the exhaust gas discharge pipe 63, and the waste heat is recovered and stored by the heat storage body 222 of the supply and exhaust chamber 221, It is discharged from the exhaust gas discharge pipe 63 through the pipe 52.

On the other hand, in FIG. 4, the switching valve 61a of the air-to-air switching device 61 causes the air supply pipe 62 to communicate with the pipe 52, and causes the exhaust gas discharge pipe 63 to communicate with the pipe 51. As a result, the combustion air from the air supply pipe 62 passes through the pipe 52, is heated by the heat storage body 222 of the supply and exhaust chamber 221 that has been stored, and is then ejected from the supply and exhaust pipe 22 into the furnace S. In addition, the combustion exhaust gas from the furnace S passes through the supply and exhaust pipe 21 by the exhaust fan provided in the exhaust gas discharge pipe 63, and the waste heat is collected and stored by the heat storage body 212 of the supply and exhaust chamber 211. It is discharged from the exhaust gas discharge pipe 63 through the pipe 51.

As described above, by switching the switching valve 61a of the air-to-exhaust gas switching device 61 between FIG. 3 and FIG. 4, it is possible to alternately repeat the combustion air between the supply and exhaust pipe 21 and the supply and exhaust pipe 22. The exhaust gas supplied to the combustion exhaust gas is recovered by the heat regenerators 212 and 222 of the combustion exhaust gas which is burned in the furnace S, and the combustion air is heated by the heat recovered by the heat storage bodies 212 and 222.

The present invention is configured to mix the fuel from the second fuel pipe 3 in the furnace S when the combustion air is supplied from the supply and exhaust pipe 21 into the furnace S and the combustion exhaust gas is discharged from the furnace S to the supply and exhaust pipe 22. A flame is formed with the combustion air from the supply and exhaust pipe 21, and a flame is further formed by the flame and the fuel from the main fuel pipe 1. Further, when the combustion air is supplied from the supply and exhaust pipe 22 to the furnace S and the combustion exhaust gas is discharged from the furnace S to the supply and exhaust pipe 21, the fuel from the third fuel pipe 4 is mixed in the furnace S. A flame is formed with the combustion air from the supply and exhaust pipe 22, and a flame is further formed by the flame and the fuel from the main fuel pipe 1.

The regenerative burner device 10 is configured to operate as follows.

The regenerative burner device 10 alternately repeats combustion and exhaust gas, that is, combustion by the fuel from the main fuel pipe 1 and the second fuel pipe 3 and the combustion air from the exhaust pipe 21, and from The exhaust gas of the combustion gas supplied from the exhaust pipe 22, the combustion by the fuel from the main fuel pipe 1 and the third fuel pipe 4, and the combustion air, and the exhaust gas from the combustion gas supplied from the exhaust pipe 21.

In the time point of the combustion by the fuel from the main fuel pipe 1 and the second fuel pipe 3, the combustion air from the supply and exhaust pipe 21, and the combustion gas from the exhaust pipe 22, As shown in FIG. 5, the adjustment valve 11 and the adjustment valve 32 are opened to supply fuel to the main fuel pipe 1 and the second fuel pipe 3. Here, when the adjustment valve 11 and the adjustment valve 32 are fully opened, the maximum fuel supply amount of the main fuel pipe 1 and the maximum fuel supply amount of the second fuel pipe 3 become the maximum combustion amount set in the regenerative burner device 10, respectively. (for example, a value such as a numerical value of the maximum combustion amount displayed as a specification value in a catalog, etc.). Further, in order to achieve an appropriate and necessary amount of combustion, the supply amount of fuel can be adjusted in the adjustment valve 11 and the adjustment valve 32.

Moreover, the adjustment valve 511 is opened, and the air supply means 62 and the piping 51 are supplied from the air supply pipe 62, and the combustion air is supplied to the supply and exhaust chamber 211. The combustion air supplied to the supply and exhaust chamber 211 is heated by the heat storage body 212 that has been stored therein, and is supplied to the exhaust pipe 21 at a high temperature. Further, the amount of combustion air supply is adjusted by adjusting the opening degree of the valve 511. At this time, the adjustment valve 42 is closed, and the fuel supply from the third fuel pipe 4 cannot be performed.

In the furnace S, first, the fuel from the second fuel pipe 3 and the combustion air from the supply and exhaust pipe 21 are mixed to form a flame. The flame is further formed by the flame and the fuel from the main fuel pipe 1.

Further, the adjustment valve 521 is opened, and the combustion gas combusted in the furnace S is heated and stored in the heat storage body 222 in the supply and exhaust chamber 221 through the supply and exhaust pipe 22, and then recirculated through the piping 52 and the air-to-exhaust switching device 61. The discharge pipe 63 is discharged.

In the time point of the combustion by the fuel from the main fuel pipe 1 and the third fuel pipe 4 and the combustion air from the supply and exhaust pipe 22 and the exhaust gas from the combustion gas supplied from the exhaust pipe 21, as shown in the figure As shown in FIG. 6, the adjustment valve 11 and the adjustment valve 42 are opened to supply fuel to the main fuel pipe 1 and the third fuel pipe 4. Here, when the adjustment valve 11 and the adjustment valve 42 are fully opened, the maximum fuel supply amount of the main fuel pipe 1 and the maximum fuel supply amount of the third fuel pipe 4 become the maximum combustion amount set in the regenerative burner device 10, respectively. (for example, a value such as a numerical value of the maximum combustion amount displayed as a specification value in a catalog, etc.). Moreover, in order to make a necessary amount of combustion, the supply amount of fuel can be appropriately adjusted in the adjustment valve 11 and the adjustment valve 42.

Moreover, the adjustment valve 521 is opened, and the air supply means 62 and the piping 52 are supplied from the air supply pipe 62, and the combustion air is supplied to the supply and exhaust chamber 221. The combustion air supplied to the supply and exhaust chamber 221 is heated by the heat storage body 222 that has been stored in the heat, and is supplied to the exhaust pipe 22 at a high temperature. Further, the amount of combustion air supply is adjusted by adjusting the opening degree of the valve 521. At this time, the adjustment valve 32 is closed, and the fuel supply from the second fuel pipe 3 cannot be performed.

In the furnace S, first, the fuel from the third fuel pipe 4 and the combustion air from the supply and exhaust pipe 22 are mixed to form a flame. The flame is further formed by the flame and the fuel from the main fuel pipe 1.

Further, the adjustment valve 511 is opened, and the combustion gas combusted in the furnace S is heated and stored in the heat storage body 212 in the supply and exhaust chamber 211 through the supply and exhaust pipe 21, and then recirculated through the piping 51 and the air-to-exhaust gas switching device 61. The discharge pipe 63 is discharged.

According to the regenerative burner device 10 having the above configuration, the following effects can be exhibited.

(1) Since the supply and exhaust pipes 21 and 22 are disposed around the main fuel pipe 1, and the second fuel pipe 3 and the third fuel pipe 4 are provided in the vicinity of the supply and exhaust pipes 21 and 22, When the fuel is supplied from the exhaust pipes 21 and 22, the main fuel pipe 1 can be used in combination. Further, since the fuel supply amount can be adjusted by the main fuel pipe 1, the second fuel pipe 3, and the third fuel pipe 4, the main fuel pipe 1 can be used in combination and the amount of combustion can be adjusted.

(2) The second fuel pipe 3 and the third fuel pipe are configured to supply fuel from the main fuel pipe 1 and alternately supply combustion air between the supply and exhaust pipe 21 and the supply and exhaust pipe 22, and cooperate with this. Since fuel is alternately supplied between the four, the fuel from the supply and exhaust pipe 21 is supplied from two places of the main fuel pipe 1 and the second fuel pipe 3, and the gas supplied from the supply and exhaust pipe 22 is supplied. The fuel is supplied from two places of the main fuel pipe 1 and the third fuel pipe 4, so that the formation of the flame is dispersed in two places, so that the shape of the flame becomes wide, so that it is possible to make it difficult to blow off and shorten the length of the flame. Further, since the combustion air is mixed with the fuel and burned in the furnace, and then mixed with the fuel of the main fuel pipe 1 and burned, the flame temperature can be lowered by dividing the time point of formation of the flame into two times. The result is that the amount of NOx generated can be reduced.

(3) The maximum fuel supply amount of the main fuel pipe 1, the maximum fuel supply amount of the second fuel pipe 3, and the maximum fuel supply amount of the third fuel pipe 4 can be set in the regenerative burner device 10. The fuel supply amount of one-half-burning amount of the maximum combustion amount is comparable to that of the conventional maximum-combustion amount set in the conventional regenerative burner (for example, the same maximum combustion amount as the specification value in the catalogue, etc.) The length is shortened and the size of the flame is further stabilized.

(4) The second fuel pipe 3 is configured to be open in the furnace S, and supplies fuel to the opening 21a of the furnace S toward the exhaust pipe 21, and the third fuel pipe 4 is configured to open in the furnace S, and Fuel is supplied to the opening 22a of the furnace S toward the exhaust pipe 22. Therefore, since the combustion air is mixed with the fuel and burned in the furnace S, and then mixed with the fuel of the main fuel pipe 1 and burned, the flame temperature can be made by dividing the time point of formation of the flame into two times. Lowering, the result is that the amount of NOx generated can be reduced.

(5) The opening 31 of the second fuel pipe 3 is located on the opposite side of the opening of the main fuel pipe 1 with respect to the opening 21a of the exhaust pipe 21, and the opening 41 of the third fuel pipe 4 is opposed to The opening 22a of the supply and exhaust pipe 22 is located on the opposite side of the opening of the main fuel pipe 1. Therefore, by delaying the mixing of the fuel from the second fuel pipe 3 and the third fuel pipe 4 with the fuel from the main fuel pipe 1, the flame temperature can be lowered, and as a result, the amount of NOx generated can be reduced. Moreover, it is easy to ensure the arrangement angle of the second fuel pipe 3 and the third fuel pipe 4, and it is easy to design the inclination angles of the second fuel pipe 3 and the third fuel pipe 4 with respect to the furnace wall or the supply and exhaust pipes 21 and 22.

(6) The distance L1 between the second fuel pipe 3 and the supply and exhaust pipe 21 is smaller than the distance L2 between the exhaust pipe 21 and the main fuel pipe 1. It is preferable that the distance L1 is equal to or less than half of the distance L2. Therefore, the fuel from the second fuel pipe 3 and the combustion air from the supply and exhaust pipe 21 can be mixed first to form a flame, and then with the main fuel pipe 1. Fuel mixing. Therefore, by delaying the mixing of the fuel from the second fuel pipe 3 and the fuel from the main fuel pipe 1, the flame temperature can be lowered, and as a result, the amount of NOx generated can be reduced.

(7) The distance L3 between the third fuel pipe 4 and the supply and exhaust pipe 22 is smaller than the distance L4 between the exhaust pipe 22 and the main fuel pipe 1. It is preferable that the distance L3 is less than or equal to half the distance L4. Therefore, the fuel from the third fuel pipe 4 and the combustion air from the supply and exhaust pipe 22 can be mixed first to form a flame, and then with the fuel from the main fuel pipe 1. Fuel mixing. Therefore, by delaying the mixing of the fuel from the third fuel pipe 4 and the fuel from the main fuel pipe 1, the flame temperature can be lowered, and as a result, the amount of NOx generated can be reduced.

(8) The supply and exhaust pipes 21 and 22 are arranged symmetrically on the concentric circles of the main fuel pipe 1, and the second fuel pipe 3 and the third fuel pipe 4 are arranged on the concentric circles of the main fuel pipe 1. symmetry. Therefore, it is easy to uniformly supply the combustion air from the supply and exhaust pipes 21 and 22 and the exhaust gas of the combustion exhaust gas to the main fuel pipe 1, and it is also easy to form the main fuel pipe 1 symmetrically as follows. The flame, that is, the flame formed by mixing the combustion air from the supply and exhaust pipe 21 with the fuel from the second fuel pipe 3, and the combustion air from the supply and exhaust pipe 22 and the third fuel The flame formed by the fuel of the tube 4 makes it possible to stabilize the combustion state around the main fuel pipe 1 in the furnace S.

(Other Embodiments) Fig. 7 shows another embodiment of the present invention. The second fuel pipe 3 is configured not to open in the furnace S but to open in the air supply and exhaust pipe 21 and to be in the air supply and exhaust pipe 21. Fuel is supplied, and the third fuel pipe 4 is configured not to open in the furnace S but to open in the supply and exhaust pipe 22, and to supply fuel into the supply and exhaust pipe 22. The other embodiment differs from the above-described embodiment in that the opening positions of the second fuel pipe 3 and the third fuel pipe 4 are different, and other configurations are the same as those of the above embodiment. Therefore, in the description of the other embodiments, the same portions as those in the above-described embodiments will be denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 7, the second fuel pipe 3 has an opening 34 in the supply and exhaust pipe 21. The opening portion 34 is located on the air supply upstream side of the air supply and exhaust pipe 21 more than the opening portion 21a. Moreover, the angle θ1 formed by the axial direction of the supply and exhaust pipe 21 and the axial direction of the second fuel pipe 3 is 45 degrees or less.

Similarly, the third fuel pipe 4 has an opening 44 in the supply and exhaust pipe 22 . The opening portion 44 is located on the air supply upstream side of the air supply and exhaust pipe 22 more than the opening portion 22a. Moreover, the angle θ2 formed by the axial direction of the supply and exhaust pipe 22 and the axial direction of the third fuel pipe 4 is 45 degrees or less.

Therefore, when the combustion air is supplied from the supply and exhaust pipe 21 to the furnace S and the combustion exhaust gas is discharged from the furnace S to the supply and exhaust pipe 22, first, the second fuel pipe 3 is mixed in the supply and exhaust pipe 21. The fuel and the combustion air from the exhaust pipe 21 form a flame, and then, in the furnace S, a flame is further formed by the flame in the exhaust pipe 21 and the fuel from the main fuel pipe 1.

When the combustion air is supplied from the air supply and exhaust pipe 22 to the furnace interior S and the combustion air is discharged from the furnace interior S to the air supply and exhaust pipe 21, first, the third fuel pipe 4 is mixed in the air supply and exhaust pipe 22. The fuel and the combustion air from the supply and exhaust pipe 22 form a flame, and then, in the furnace S, a flame is further formed by the flame in the supply and exhaust pipe 22 and the fuel from the main fuel pipe 1.

According to the above configuration, since the flame is formed in the supply and exhaust pipe 21 and in the supply and exhaust pipe 22, the flame state in the furnace S can be further stabilized.

Since the angle between the axial direction of the exhaust pipe 21 and the axial direction of the second fuel pipe 3 is 45 degrees or less, the fuel from the second fuel pipe 3 flows along the combustion air of the supply and exhaust pipe 21. The direction flows smoothly, and the mixing of the fuel from the second fuel pipe 3 and the combustion air from the supply and exhaust pipe 21 can be promoted.

Since the angle between the axial direction of the exhaust pipe 22 and the axial direction of the third fuel pipe 4 is 45 degrees or less, the fuel from the third fuel pipe 4 flows along the combustion air of the supply and exhaust pipe 22 . The direction flows smoothly, and the mixing of the fuel from the third fuel pipe 4 and the combustion air from the supply and exhaust pipe 22 can be promoted.

In the above embodiment and other embodiments, the main fuel pipe 1 is configured to supply only fuel, but the main fuel pipe 1 may be configured to supply fuel and combustion air. FIG. 8 is a schematic cross-sectional view of the regenerative burner device 10 in which the first air pipe 12 is provided, and the first air pipe 12 supplies combustion air to the main fuel pipe 1.

As shown in FIG. 8, the first air pipe 12 has an opening 12a in the main fuel pipe 1. The opening portion 12a is located on the upstream side of the fuel supply in the main fuel pipe 1 from the opening portion 1a of the main fuel pipe 1 toward the furnace interior S. The first air pipe 12 is provided with an adjustment valve 13 that switches the first air pipe 12 and adjusts the amount of supply of combustion air. Moreover, the angle θ3 formed by the axial direction of the main fuel pipe 1 and the axial direction of the first air pipe 12 is 45 degrees or less.

Therefore, when the combustion air is supplied from the supply and exhaust pipe 21 to the furnace S and the combustion exhaust gas is discharged from the furnace S to the supply and exhaust pipe 22, first, the fuel from the second fuel pipe 3 is mixed in the furnace S. A flame is formed with the combustion air from the supply and exhaust pipe 21. Further, in the main fuel pipe 1, the fuel from the main fuel pipe 1 and the combustion air from the first air pipe 12 are mixed to form a flame. Further, in the furnace S, a flame is further formed by the flame from the second fuel pipe 3 and the supply and exhaust pipe 21 and the flame from the main fuel pipe 1.

Further, when the combustion air is supplied from the supply and exhaust pipe 22 to the furnace S and the combustion exhaust gas is discharged from the furnace S to the supply and exhaust pipe 21, first, the fuel from the third fuel pipe 4 is mixed in the furnace S. A flame is formed with the combustion air from the supply and exhaust pipe 22. Further, in the main fuel pipe 1, the fuel from the main fuel pipe 1 and the combustion air from the first air pipe 12 are mixed to form a flame. Further, in the furnace S, a flame is further formed by the flame from the third fuel pipe 4 and the supply and exhaust pipe 22 and the flame from the main fuel pipe 1.

According to the above configuration, since the flame is formed in the main fuel pipe 1, the flame state in the furnace S can be made more stable.

Since the angle formed by the axial direction of the main fuel pipe 1 and the axial direction of the first air pipe 12 is 45 degrees or less, the combustion air from the first air pipe 12 smoothly flows along the fuel flow direction of the main fuel pipe 1. The flow can promote the mixing of the fuel from the main fuel pipe 1 and the combustion air from the first air pipe 12.

In addition, in order to heat the combustion air in the first air pipe 12, a heating device such as an electric heater may be provided in the first air pipe 12.

In the above embodiment, the regenerative burner device 10 includes two supply and exhaust pipes 21 and 22, but the number of the supply and exhaust pipes may be three or more. Further, in consideration of the fact that the combustion air is alternately supplied between the supply and exhaust pipes and the combustion gas is discharged, the number of the supply and exhaust pipes is preferably an even number of two or more.

In the above embodiment, the supply and exhaust pipes 21 and 22 are arranged symmetrically on the concentric circles of the main fuel pipe 1, but may be arranged asymmetrically with respect to the main fuel pipe 1. Similarly, the second fuel pipe 3 and the third fuel pipe 4 are arranged symmetrically on the concentric circle of the main fuel pipe 1, but may be arranged asymmetrically with respect to the main fuel pipe 1.

Various changes and modifications can be made without departing from the spirit and scope of the inventions. Industrial availability

In the present invention, since it is possible to provide a regenerative burner device capable of maintaining the combustion amount of the conventional regenerative burner device and shortening the flame length, the same amount of combustion can be obtained even in a furnace having a short depth.

1‧‧‧Main fuel pipe

Openings 1a, 12a, 21a, 22a, 31, 34, 41, 44‧‧

3‧‧‧2nd fuel pipe (sub fuel pipe)

4‧‧‧3rd fuel pipe (sub fuel pipe)

10‧‧‧ Regenerative burner installation

11, 13, 32, 42, 511, 521‧‧ ‧ adjustment valve

12‧‧‧1st air tube

21, 22, 23, 24‧‧‧ exhaust pipes

51, 52‧‧‧ piping

61‧‧‧Air exhaust switching device

61a‧‧‧Switching valve

62‧‧‧Air supply pipe

63‧‧‧Exhaust exhaust pipe

211, 221‧‧ ‧ supply and exhaust room

212, 222‧‧ ‧ regenerator

213, 223‧‧‧Flange

L1~L4‧‧‧Distance

S‧‧‧ furnace

Θ1～θ3‧‧‧ angle

Fig. 1 is a schematic cross-sectional view showing a regenerative burner device according to an embodiment of the present invention. Fig. 2 is a schematic view of a regenerative burner device as seen from the inside of the furnace. Fig. 3 is a view for explaining switching of an air-to-exhaust gas switching device. Fig. 4 is a view for explaining switching of an air-to-exhaust gas switching device. 5 is a time point in the combustion by the fuel from the main fuel pipe 1 and the second fuel pipe 3 and the combustion air from the supply and exhaust pipe 21 and the exhaust gas from the combustion gas from the exhaust pipe 22 A schematic cross-sectional view of a regenerative burner device. 6 is a time point in the combustion by the fuel from the main fuel pipe 1 and the third fuel pipe 4 and the combustion air from the supply and exhaust pipe 22 and the exhaust gas from the combustion gas supplied from the exhaust pipe 21 A schematic cross-sectional view of a regenerative burner device. Fig. 7 is a schematic cross-sectional view showing a regenerative burner device according to another embodiment. Fig. 8 is a schematic cross-sectional view showing a regenerative burner device according to still another embodiment.

Claims (6)

A regenerative burner device is provided with a regenerator that recovers heat of combustion gas combusted in the furnace and heats combustion air. The regenerative burner device is characterized by: a fuel supply pipe; a plurality of supply and exhaust pipes disposed around the main fuel pipe, supplying combustion air and discharging combustion gas, and a fuel supply side in the vicinity of the supply and exhaust pipe The fuel pipe, the main fuel pipe and the auxiliary fuel pipe can adjust the fuel supply amount. The regenerative burner device according to claim 1, wherein the first supply and exhaust pipe and the second supply and exhaust pipe are provided in the exhaust pipe, and the main fuel pipe is disposed in the opening in the furnace 1 between the opening of the exhaust pipe and the opening of the second supply and exhaust pipe in the furnace, and the first fuel pipe is provided in the vicinity of the opening of the first supply and exhaust pipe (2) an opening of the fuel pipe, and an opening of the third fuel pipe in the furnace is provided in the vicinity of the opening of the second supply and exhaust pipe, and the regenerative burner device is configured to be supplied to the first supply and exhaust pipe In the case of the combustion air, the main fuel pipe and the second fuel pipe are supplied with fuel, the second supply and exhaust pipe recovers waste heat, the third fuel pipe is not supplied with fuel, and the second supply pipe is configured to be combusted. When air is used, the main fuel pipe and the third fuel pipe supply fuel, the first supply and exhaust pipe recovers waste heat, and the second fuel pipe does not supply fuel. The regenerative burner device according to claim 2, wherein the maximum fuel supply amount of the main fuel pipe, the maximum fuel supply amount of the second fuel pipe, and the maximum fuel supply amount of the third fuel pipe are respectively obtained in the foregoing The fuel supply amount of one half of the maximum combustion amount set by the regenerative burner device. The regenerative burner device according to claim 2 or 3, wherein the second fuel pipe is configured to be open in the first supply and exhaust pipe, and to supply fuel into the first supply and exhaust pipe, the third fuel The tube is configured to open in the second supply and exhaust pipe and to supply fuel into the second supply and exhaust pipe. The regenerative burner device according to claim 2 or 3, wherein the opening of the second fuel pipe is located on the opposite side of the opening of the main fuel pipe with respect to the opening of the first fuel supply pipe; The opening of the third fuel pipe is located on the opposite side of the opening of the main fuel pipe with respect to the opening of the second supply and exhaust pipe. The regenerative burner device according to any one of claims 1 to 5, wherein the first air pipe is provided, and the first air pipe supplies combustion air to the main fuel pipe.