JP2018136049A - Regeneration burner device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a regeneration burner device which enables a length of a flame to be shortened while maintaining a combustion amount of a conventional regeneration burner.SOLUTION: A regeneration burner device 10 is provided with a heat reservoir, which recovers heat of a combustion gas burned in a furnace S and heats combustion air, and includes: a main fuel pipe 1 which supplies a fuel; and multiple air supply/exhaust pipes 21, 22 which are disposed around the main fuel pipe 1, supply the combustion air, and exhaust the combustion gas. Sub fuel pipes 3, 4 which supply the fuel are respectively provided near the air supply/exhaust pipes 21, 22. The main fuel pipe 1 and the sub fuel pipes 3, 4 are configured so that their fuel supply amount can be adjusted.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a regeneration burner apparatus.

  Conventionally, in a combustion apparatus such as a heating furnace or a combustion furnace, for the purpose of saving energy, the heat of the combustion gas burned in the furnace is recovered and the regenerator provided with a heat storage body in the burner so as to heat the combustion air. Burner devices are known. As shown in Patent Documents 1 and 2, a burner that supplies fuel and combustion air is disposed at the center in the furnace introduction section, and combustion air is supplied around the burner to exhaust the combustion gas. In some cases, a main flame is formed by arranging an air supply / exhaust pipe.

JP 2007-024335 A JP 2010-127525 A

  In these examples, the flame is formed long from the in-furnace introduction part by the jet of combustion air from the supply / exhaust pipe, and a furnace with a narrow internal space, particularly a furnace with a short depth from the in-furnace introduction part. Has a problem that it is difficult to obtain a large amount of heat because the flame hits the furnace wall.

  Therefore, an object of the present invention is to provide a regenerative burner device that can shorten the length of the flame while maintaining the combustion amount of the conventional regenerative burner device.

The present invention
A regenerative burner device provided with a heat storage body for recovering heat of combustion gas burned in the furnace and heating combustion air,
A main fuel pipe for supplying fuel;
A plurality of air supply and exhaust pipes disposed around the main fuel pipe and supplying combustion air and exhausting combustion gas;
Sub fuel pipes for supplying fuel are provided in the vicinity of the supply and exhaust pipes,
The main fuel pipe and the sub fuel pipe are characterized in that the fuel supply amount can be adjusted.

  According to the above configuration, the supply / exhaust pipe is disposed around the main fuel pipe, and the auxiliary fuel pipe is provided in the vicinity of the supply / exhaust pipe. Thus, when fuel is injected, the main fuel pipe can also be used. Since the main fuel pipe and the auxiliary fuel pipe can adjust the fuel supply amount, the combustion amount can be adjusted while also using the main fuel pipe.

The present invention preferably further comprises the following configuration.
(1) A first air supply / exhaust pipe and a second air supply / exhaust pipe are provided as the air supply / exhaust pipe, and an opening of the main fuel pipe into the furnace is an opening of the first air supply / exhaust pipe into the furnace. And the opening of the second air supply / exhaust pipe into the furnace,
As the auxiliary fuel pipe, an opening of the second fuel pipe is provided in the vicinity of the opening of the first air supply / exhaust pipe. An opening to the
When the first supply / exhaust pipe supplies combustion air, the main fuel pipe and the second fuel pipe supply fuel, the second supply / exhaust pipe collects exhaust heat, and the third fuel pipe No fuel is supplied,
When the second air supply / exhaust pipe supplies combustion air, the main fuel pipe and the third fuel pipe supply fuel, the first air supply / exhaust pipe collects exhaust heat, and the second fuel pipe The fuel is not supplied.
(2) In the 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 respectively set by the regenerative burner device. This is a fuel supply amount capable of obtaining a combustion amount that is half of the maximum combustion amount.
(3) In the configuration (1) or (2), the second fuel pipe opens into the first air supply / exhaust pipe and supplies fuel into the first air supply / exhaust pipe,
The third fuel pipe opens into the second air supply / exhaust pipe and supplies fuel into the second air supply / exhaust pipe.
(4) In the 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 / exhaust pipe. And
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 air supply / exhaust pipe.
(5) A first air pipe is provided for supplying combustion air into the main fuel pipe.

  According to the configuration (1), while supplying fuel from the main fuel pipe, combustion air is alternately supplied between the first air supply / exhaust pipe and the second air supply / exhaust pipe, and accordingly the second fuel pipe is supplied. Since the fuel is supplied alternately between the first fuel supply pipe and the third fuel pipe, the fuel is supplied from two locations of the main fuel pipe and the second fuel pipe with respect to the supply air from the first supply / exhaust pipe. Since the fuel is supplied from the two places of the main fuel pipe and the third fuel pipe with respect to the air supplied from the second air supply / exhaust pipe, the formation of the flame is dispersed in two places, so the shape of the flame is wide. It is difficult to blow out, and the length of the flame can be shortened. In addition, the combustion air and fuel are mixed and burned in the furnace, and then further mixed with the fuel in the main fuel pipe and burned. Therefore, the flame temperature is lowered by dividing the flame formation timing into two times. As a result, the amount of NOx generated can be reduced.

  According to the configuration (2), 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 set to the maximum set by the regenerative burner device. By setting the fuel supply amount so that a combustion amount that is half the combustion amount can be obtained, the same maximum combustion amount is set in the conventional regenerative burner (for example, the same maximum combustion amount is indicated in the catalog etc. as the specification value) The flame length can be shortened and the flame size can be stabilized.

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

  According to the configuration (4), the mixing timing of the fuel and the combustion air from the main fuel pipe is delayed with respect to the mixing timing of the fuel and the combustion air from the second fuel pipe and the third fuel pipe. Thus, the flame temperature can be lowered, and as a result, the amount of NOx generated can be reduced. In addition, it is easy to secure the arrangement area of the second fuel pipe and the third fuel pipe, and the inclination angle of the second fuel pipe and the third fuel pipe with respect to the furnace wall or the supply / exhaust pipe can be easily designed.

  According to the configuration (5), since the flame is formed in the main fuel pipe, the state of the flame in the furnace can be further stabilized.

  In short, according to the present invention, it is possible to provide a regenerative burner apparatus that can shorten the length of the flame while maintaining the combustion amount of the conventional regenerative burner apparatus.

It is a plane section schematic diagram of a regeneration burner device concerning an embodiment of the present invention. It is the schematic of the regeneration burner apparatus seen from the furnace inner side. It is a figure explaining switching of an air exhaust gas switching device. It is a figure explaining switching of an air exhaust gas switching device. 2 is a schematic cross-sectional view of a regenerative burner device at the timing of combustion from fuel from a main fuel pipe 1 and a second fuel pipe 3 and combustion air from a supply and exhaust pipe 21 and exhaust of combustion gas from a supply and exhaust pipe 22. FIG. FIG. 3 is a schematic cross-sectional view of the regenerative burner device at the timing of combustion with fuel from the main fuel pipe 1 and third fuel pipe 4 and combustion air from the supply and exhaust pipe 22 and exhaust of combustion gas from the supply and exhaust pipe 21. It is the cross-sectional schematic of the regeneration burner apparatus which concerns on another embodiment. It is the cross-sectional schematic of the regeneration burner apparatus which concerns on another embodiment.

(overall structure)
FIG. 1 is a schematic plan sectional view of a regeneration 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 that supplies fuel, and two or more supply pipes that are arranged around the main fuel pipe 1, supply combustion air, and exhaust combustion gas. Exhaust pipes 21 and 22 are provided.

  The main fuel pipe 1 supplies fuel to the furnace interior S, and one end communicates with the furnace interior S. The supply and exhaust pipes 21 and 22 are configured to supply combustion air to the furnace interior S, and one end communicates with the furnace interior S. The main fuel pipe 1 is provided with an adjustment valve 11 that opens and closes the main fuel pipe 1 and adjusts the fuel supply amount. The supply and exhaust pipes 21 and 22 are inclined toward the main fuel pipe 1 toward the inside S of the furnace. The supply / exhaust pipes 21 and 22 are preferably inclined by about 10 degrees.

  Further, a second fuel pipe 3 and a third fuel pipe 4 for supplying fuel to the furnace S are provided. The second fuel pipe 3 is provided in the vicinity of the air supply / exhaust pipe 21 and has an opening 31 to the furnace S in the vicinity of the opening 21 a to the furnace S of the air supply / exhaust pipe 21. The second fuel pipe 3 supplies fuel toward the opening 21 a of the air supply / exhaust pipe 21. The inner diameter of the second fuel pipe 3 is smaller than the inner diameter of the air supply / exhaust pipe 21. The second fuel pipe 3 is provided with an adjustment valve 32 that opens and closes the second fuel pipe 3 and adjusts the fuel supply amount.

  The third fuel pipe 4 is provided in the vicinity of the supply / exhaust pipe 22, and has an opening 41 to the furnace S in the vicinity of the opening 22a to the furnace S of the supply / exhaust pipe 22. The third fuel pipe 4 supplies fuel toward the opening 22 a of the air supply / exhaust pipe 22. The inner diameter of the third fuel pipe 4 is smaller than the inner diameter of the air supply / exhaust pipe 22. The third fuel pipe 4 is provided with an adjustment valve 42 that opens and closes the third fuel pipe 4 and adjusts the fuel supply amount.

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

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

  A distance L1 between the second fuel pipe 3 and the supply / exhaust pipe 21 is smaller than a distance L2 between the supply / exhaust pipe 21 and the main fuel pipe 1. Preferably, the distance L1 is not more than half of the distance L2. Similarly, the distance L3 between the third fuel pipe 4 and the supply / exhaust pipe 22 is smaller than the distance L4 between the supply / exhaust pipe 22 and the main fuel pipe 1. Preferably, the distance L3 is not more than half of the distance L4. Further, the distance L1 and the distance L3 are equal, and the distance L2 and the distance L4 are equal.

  As shown in FIG. 1, the air supply / exhaust chamber 211 is connected to the air exhaust gas switching device 61 via a pipe 51, and the air supply / exhaust chamber 221 is similarly connected to the air exhaust gas switching device 61 via a pipe 52. It is connected. The air supply / exhaust chamber 211 and the pipe 51 are connected via a flange 213, and the air supply / exhaust chamber 221 and the pipe 52 are connected via a flange 223. The piping 51 is provided with an adjustment valve 511 for opening and closing the piping 51 and adjusting the combustion air supply amount, and the piping 52 is provided with an adjustment valve 521 for opening and closing the piping 52 and adjusting the combustion air supply amount. It has been. The air exhaust gas switching device 61 is connected to the air supply pipe 62 and the exhaust gas discharge pipe 63, and communicates the air supply pipe 62 with the pipe 51 or the pipe 52, and simultaneously communicates the exhaust gas exhaust pipe 63 with the pipe 52 or the pipe 51. The switching valve 61a is provided. The air supply pipe 62 is provided with an air supply blower (not shown) for supplying combustion air, and the exhaust gas discharge pipe 63 is an exhaust fan (not shown) for discharging combustion exhaust gas. ) Is provided.

  3 and 4 are diagrams illustrating the switching of the air exhaust gas switching device 61. FIG. In FIG. 3, the switching valve 61 a of the air exhaust gas switching device 61 communicates the air supply pipe 62 and the pipe 51 and communicates the exhaust gas discharge pipe 63 and 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 in which heat is stored in the supply / exhaust chamber 211, and is injected into the furnace S from the supply / exhaust pipe 21. Further, the combustion exhaust gas from the furnace S passes through the air supply / exhaust pipe 22 by an exhaust fan provided in the exhaust gas exhaust pipe 63, and the exhaust heat is recovered and stored by the heat storage body 222 of the air supply / exhaust chamber 221. And is discharged from the exhaust gas discharge pipe 63.

  On the other hand, in FIG. 4, the switching valve 61 a of the air exhaust gas switching device 61 communicates the air supply pipe 62 and the pipe 52, and communicates the exhaust gas discharge pipe 63 and 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 in which heat is stored in the supply / exhaust chamber 221, and is injected from the supply / exhaust pipe 22 into the furnace S. The combustion exhaust gas from the furnace S passes through the air supply / exhaust pipe 21 by the exhaust fan provided in the exhaust gas exhaust pipe 63, and the exhaust heat is collected and stored by the heat storage body 212 of the air supply / exhaust chamber 211. And is discharged from the exhaust gas discharge pipe 63.

  As described above, by switching the switching valve 61a of the air exhaust gas switching device 61 between FIG. 3 and FIG. 4, the supply of combustion air and the combustion exhaust gas between the air supply / exhaust pipe 21 and the air supply / exhaust pipe 22 are performed. The exhaust gas is alternately repeated, and the heat of the combustion exhaust gas combusted in the furnace S is recovered by the heat accumulators 212 and 222, and the combustion air can be heated by the heat recovered by the heat accumulators 212 and 222. ing.

  When the combustion air is supplied from the supply / exhaust pipe 21 to the furnace interior S and the combustion exhaust gas is exhausted from the furnace S to the supply / exhaust pipe 22, the fuel from the second fuel pipe 3 and the supply / exhaust pipe 21 are exhausted in the furnace S. Are mixed with the combustion air from, and a flame is formed. The flame and the fuel from the main fuel pipe 1 further form a flame. When the combustion air is supplied from the supply / exhaust pipe 22 to the furnace interior S and the combustion exhaust gas is exhausted from the furnace S to the supply / exhaust pipe 21, the fuel and supply / exhaust gas from the third fuel pipe 4 are supplied in the furnace S. Combustion air from the pipe 22 is mixed to form a flame, and a flame is further formed by this flame and the fuel from the main fuel pipe 1.

  The regenerative burner device 10 operates as follows.

  The regenerative burner device 10 includes combustion from the main fuel pipe 1 and the second fuel pipe 3 and combustion air from the supply and exhaust pipe 21 and exhaust of combustion gas from the supply and exhaust pipe 22, and the main fuel pipe 1 and the second fuel pipe 10. 3. Combustion with fuel from the fuel pipe 4 and combustion air and exhaust of combustion gas from the supply / exhaust pipe 21 are repeated alternately.

  The timing of combustion by the fuel from the main fuel pipe 1 and the second fuel pipe 3 and combustion air from the supply and exhaust pipe 21 and the exhaust of the combustion gas from the supply and exhaust pipe 22 is adjusted as shown in FIG. The valve 11 and the regulating valve 32 are opened, and fuel is supplied to the main fuel pipe 1 and the second fuel pipe 3. Here, when the regulating valve 11 and the regulating 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 are the maximum values set by the regenerative burner device 10 respectively. The combustion amount is half of the combustion amount (for example, the numerical value of the maximum combustion amount indicated in the catalog or the like as a specification value). In addition, the fuel supply amount can be adjusted by the adjustment valve 11 and the adjustment valve 32 so that the required combustion amount is obtained as appropriate.

  Further, the adjustment valve 511 is opened, and combustion air is supplied from the air supply pipe 62 to the supply / exhaust chamber 211 via the air exhaust gas switching device 61 and the pipe 51. The combustion air supplied to the supply / exhaust chamber 211 is heated by the stored heat storage body 212 and is supplied to the supply / exhaust pipe 21 as high-temperature air. Note that the combustion air supply amount is adjusted by the opening degree of the adjustment valve 511. At this time, the regulating valve 42 is closed and fuel supply from the third fuel pipe 4 is not performed.

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

  Further, the combustion gas burned in the furnace S when the regulating valve 521 is opened passes through the air supply / exhaust pipe 22, heats and stores the heat storage body 222 in the air supply / exhaust chamber 221, and the piping 52 and the air exhaust gas switching device. The exhaust gas is discharged from the exhaust gas discharge pipe 63 through 61.

  As shown in FIG. 6, the timing of the combustion 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 of the combustion gas from the supply and exhaust pipe 21 is adjusted. The valve 11 and the regulating valve 42 are opened, and fuel is supplied to the main fuel pipe 1 and the third fuel pipe 4. Here, when the regulating valve 11 and the regulating 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 are the maximum values set by the regenerative burner device 10 respectively. The combustion amount is half of the combustion amount (for example, the numerical value of the maximum combustion amount indicated in the catalog or the like as a specification value). In addition, the fuel supply amount can be adjusted by the adjusting valve 11 and the adjusting valve 42 so that the necessary combustion amount is obtained as appropriate.

  Further, the regulating valve 521 is opened, and combustion air is supplied from the air supply pipe 62 to the supply / exhaust chamber 221 via the air exhaust gas switching device 61 and the pipe 52. The combustion air supplied to the supply / exhaust chamber 221 is heated by the stored heat storage body 222 and is supplied to the supply / exhaust pipe 22 as high-temperature air. Note that the combustion air supply amount is adjusted by the opening of the adjustment valve 521. At this time, the regulating valve 32 is closed, and fuel supply from the second fuel pipe 3 is not performed.

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

  Further, the combustion gas burned in the furnace S when the regulating valve 511 is opened passes through the supply / exhaust pipe 21, heats and stores the heat storage body 212 in the supply / exhaust chamber 211, and the piping 51 and the air exhaust gas switching device. The exhaust gas is discharged from the exhaust gas discharge pipe 63 through 61.

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

(1) The supply / 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 / exhaust pipes 21 and 22. The main fuel pipe 1 can also be used when fuel is injected into the air supplied from the respective supply / exhaust pipes 21 and 22. The main fuel pipe 1, the second fuel pipe 3, and the third fuel pipe 4 can adjust the fuel supply amount, so that the combustion amount can be adjusted while the main fuel pipe 1 is also used.

(2) While supplying fuel from the main fuel pipe 1, combustion air is supplied alternately between the supply / exhaust pipe 21 and the supply / exhaust pipe 22, and the second fuel pipe 3 and the third fuel pipe 4 are accordingly adjusted. Since the fuel is supplied alternately with the fuel, the fuel is supplied from two locations of the main fuel pipe 1 and the second fuel pipe 3 with respect to the air supplied from the air supply / exhaust pipe 21, and the air supply / exhaust Since the fuel is supplied from the two locations of the main fuel pipe 1 and the third fuel pipe 4 with respect to the supply air from the pipe 22, the formation of the flame is dispersed in two places, so the shape of the flame is widened and blown It is hard to disappear and the length of the flame can be shortened. In addition, since combustion air and fuel are mixed and burned in the furnace, and further mixed with the fuel in the main fuel pipe 1 and burned, the flame temperature is reduced by dividing the flame formation timing into two times. As a result, 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 are half of the maximum combustion amount set in the regenerative burner device 10. The same maximum combustion amount is set with the conventional regenerative burner by setting the fuel supply amount that can obtain the combustion amount of the same (for example, the same maximum combustion amount is indicated in the catalog etc. as the specification value) Rather, the length of the flame can be shortened, and the size of the flame can be stabilized.

(4) The second fuel pipe 3 opens into the furnace S and supplies fuel toward the opening 21a of the air supply / exhaust pipe 21 into the furnace S. The third fuel pipe 4 The fuel is supplied to the opening S in the furnace S toward the opening 22a of the supply / exhaust pipe 22 to the furnace S. Therefore, after the combustion air and the fuel are mixed and burned in the furnace S, they are further mixed with the fuel in the main fuel pipe 1 and burned, so that the flame temperature is divided by dividing the flame formation timing into two times. As a result, the amount of NOx generated can be reduced.

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

(6) The distance L1 between the second fuel pipe 3 and the supply / exhaust pipe 21 is smaller than the distance L2 between the supply / exhaust pipe 21 and the main fuel pipe 1. Preferably, the distance L1 is equal to or less than half of the distance L2. Therefore, after the fuel from the second fuel pipe 3 and the combustion air from the air supply / exhaust pipe 21 are first mixed to form a flame, The fuel from the fuel pipe 1 can be mixed. 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 / exhaust pipe 22 is smaller than the distance L4 between the supply / exhaust pipe 22 and the main fuel pipe 1. Preferably, the distance L3 is equal to or less than half of the distance L4. Therefore, after the fuel from the third fuel pipe 4 and the combustion air from the supply / exhaust pipe 22 are first mixed to form a flame, The fuel from the fuel pipe 1 can be mixed. 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 / exhaust pipes 21 and 22 are arranged symmetrically on the concentric circle of the main fuel pipe 1, and the second fuel pipe 3 and the third fuel pipe 4 are on the concentric circle of the main fuel pipe 1. Are arranged symmetrically. Therefore, the supply of combustion air from the supply / exhaust pipes 21 and 22 and the exhaust of the combustion exhaust gas are easily performed uniformly on the main fuel pipe 1. The flame formation by mixing with the fuel from the fuel pipe 2 and the flame formation by mixing the combustion air from the supply / exhaust pipe 22 and the fuel from the third fuel pipe 4 are symmetrical with respect to the main fuel pipe 1. In the furnace S, the combustion state around the main fuel pipe 1 can be further stabilized.

(Another embodiment)
FIG. 7 shows another embodiment according to the present invention, in which the second fuel pipe 3 does not open into the furnace S but opens into the air supply / exhaust pipe 21 to supply fuel into the air supply / exhaust pipe 21. The third fuel pipe 4 does not open into the furnace S, but opens into the air supply / exhaust pipe 22 and supplies fuel into the air supply / exhaust pipe 22. Another embodiment is different from the above embodiment in that the opening positions of the second fuel pipe 3 and the third fuel pipe 4 are different, and the other configurations are the same as the above embodiment. For this reason, in description of another embodiment, the same code | symbol is attached | subjected to the same part as the said embodiment, and detailed description is abbreviate | omitted about those content.

  As shown in FIG. 7, the second fuel pipe 3 has an opening 34 in the air supply / exhaust pipe 21. The opening 34 is located on the air supply upstream side of the opening 21 a in the air supply / exhaust pipe 21. The angle θ1 formed by the axial direction of the supply / 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 air supply / exhaust pipe 22. The opening 44 is located on the air supply upstream side of the opening 22 a in the air supply / exhaust pipe 22. The angle θ2 formed by the axial direction of the supply / exhaust pipe 22 and the axial direction of the third fuel pipe 4 is 45 degrees or less.

  Therefore, when supplying combustion air from the supply / exhaust pipe 21 to the furnace interior S and exhausting the combustion exhaust gas from the furnace S to the supply / exhaust pipe 22, first, from the second fuel pipe 3 in the supply / exhaust pipe 21. The fuel and the combustion air from the supply / exhaust pipe 21 are mixed to form a flame. Next, in the furnace S, a flame is further generated by the flame in the supply / exhaust pipe 21 and the fuel from the main fuel pipe 1. It is supposed to be formed.

  When supplying combustion air from the supply / exhaust pipe 22 to the furnace interior S and exhausting the combustion exhaust gas from the furnace S to the supply / exhaust pipe 21, first, from the third fuel pipe 4 in the supply / exhaust pipe 22. The fuel and the combustion air from the supply / exhaust pipe 22 are mixed to form a flame. Next, in the furnace S, a flame is further generated by the flame in the supply / exhaust pipe 22 and the fuel from the main fuel pipe 1. It is supposed to be formed.

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

  Since the angle formed between the axial direction of the supply / 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 is used as the combustion air in the supply / exhaust pipe 21. It flows smoothly along the flow direction, and the mixing of the fuel from the second fuel pipe 3 and the combustion air from the supply / exhaust pipe 21 can be promoted.

  Since the angle formed between the axial direction of the supply / 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 is used as the combustion air in the supply / exhaust pipe 22. It flows smoothly along the flow direction, and the mixing of the fuel from the third fuel pipe 4 and the combustion air from the supply / exhaust pipe 22 can be promoted.

  In the above embodiment and another embodiment, the main fuel pipe 1 supplies only fuel, but the main fuel pipe 1 may supply fuel and combustion air. FIG. 8 is a schematic cross-sectional view of the regeneration burner apparatus 10 in which a first air pipe 12 that supplies combustion air to the main fuel pipe 1 is provided.

  As shown in FIG. 8, the first air pipe 12 has an opening 12 a in the main fuel pipe 1. The opening 12 a is located in the fuel supply upstream side of the main fuel pipe 1 relative to the opening 1 a into the furnace S of the main fuel pipe 1. The first air pipe 12 is provided with an adjusting valve 13 that opens and closes the first air pipe 12 and adjusts the combustion air supply amount. 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 / exhaust pipe 21 to the furnace interior S and the combustion exhaust gas is exhausted from the furnace S to the supply / exhaust pipe 22, first, in the furnace S, the fuel from the second fuel pipe 3 and Combustion air from the air supply / exhaust pipe 21 is mixed to form a flame. 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. In the furnace S, a flame is further formed by the flame from the second fuel pipe 3 and the supply / exhaust pipe 21 and the flame from the main fuel pipe 1.

  In addition, when supplying combustion air from the supply / exhaust pipe 22 to the furnace interior S and exhausting combustion exhaust gas from the furnace S to the supply / exhaust pipe 21, first, in the furnace S, the fuel from the third fuel pipe 4 and Combustion air from the supply / exhaust pipe 22 is mixed to form a flame. 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. In the furnace S, a flame is further formed by the flame from the third fuel pipe 4 and the supply / 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 state of the flame in the furnace S can be further stabilized.

  Since the angle formed between 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 is used as the fuel in the main fuel pipe 1. It flows smoothly along the flow direction, and the mixing of the fuel from the main fuel pipe 1 and the combustion air from the first air pipe 12 can be promoted.

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

  In the above embodiment, the regenerative burner device 10 includes the two air supply / exhaust pipes 21 and 22. However, the number of the air supply / exhaust pipes may be three or more. In consideration of supplying combustion air alternately between the supply and exhaust pipes and exhausting the combustion gas, the number of supply and exhaust pipes is preferably an even number of 2 or more.

  In the above embodiment, the supply / exhaust pipes 21 and 22 are arranged on the concentric circles of the main fuel pipe 1 so as to be symmetric, 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 on the concentric circle of the main fuel pipe 1 so as to be symmetrical, but may be arranged asymmetrically with respect to the main fuel pipe 1. .

  Various modifications and changes can be made without departing from the spirit and scope of the invention as set forth in the appended claims.

  In the present invention, it is possible to provide a regenerative burner device capable of shortening the length of the flame while maintaining the combustion amount of the conventional regenerative burner device. Can be obtained.

1 Main fuel pipe 1a Opening
11 Adjustment Valve 12 First Air Pipe 12a Opening 13 Adjustment Valve
21 Supply / Exhaust Pipe 21a Opening
22 Supply / Exhaust Pipe 22a Opening 23 Supply / Exhaust Pipe 24 Supply / Exhaust Pipe
3 Second fuel pipe (sub fuel pipe) 31 Opening 32 Adjusting valve 34 Opening
4 Third fuel pipe (sub fuel pipe) 41 Opening 42 Adjusting valve 44 Opening
211 Supply / exhaust chamber 212 Heat storage body 213 Flange
221 Supply / exhaust chamber 222 Heat storage body 223 Flange
51 Piping 511 Adjusting valve
52 Piping 521 Regulating valve
61 Air exhaust gas switching device 61a Switching valve
62 Air supply pipe 63 Exhaust gas discharge pipe
10 Regenerative burner equipment
S Furnace
L1-L4 distance
θ1-θ3 angle

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

Claims (6)

A regenerative burner device provided with a heat storage body for recovering heat of combustion gas burned in the furnace and heating combustion air,
A main fuel pipe for supplying fuel;
A plurality of air supply and exhaust pipes disposed around the main fuel pipe and supplying combustion air and exhausting combustion gas;
Sub fuel pipes for supplying fuel are provided in the vicinity of the supply and exhaust pipes,
A regenerative burner device characterized in that the main fuel pipe and the sub fuel pipe are adjustable in fuel supply amount.
As the air supply / exhaust pipe, a first air supply / exhaust pipe and a second air supply / exhaust pipe are provided, and the opening of the main fuel pipe into the furnace includes the opening of the first air supply / exhaust pipe into the furnace It is arranged between the opening to the furnace of 2 supply and exhaust pipes,
As the auxiliary fuel pipe, an opening of the second fuel pipe is provided in the vicinity of the opening of the first air supply / exhaust pipe. An opening to the
When the first supply / exhaust pipe supplies combustion air, the main fuel pipe and the second fuel pipe supply fuel, the second supply / exhaust pipe collects exhaust heat, and the third fuel pipe No fuel is supplied,
When the second air supply / exhaust pipe supplies combustion air, the main fuel pipe and the third fuel pipe supply fuel, the first air supply / exhaust pipe collects exhaust heat, and the second fuel pipe The regenerative burner device according to claim 1, wherein fuel is not supplied.
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 half the maximum combustion amount set in the regenerative burner device. The regeneration burner device according to claim 2, wherein the fuel supply amount is such that the amount can be obtained.
The second fuel pipe opens into the first air supply / exhaust pipe and supplies fuel into the first air supply / exhaust pipe;
4. The regeneration burner device according to claim 2, wherein the third fuel pipe opens into the second air supply / exhaust pipe and supplies fuel into the second air supply / exhaust pipe. 5.
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 air supply / exhaust pipe,
The regeneration burner device according to claim 2 or 3, wherein 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 / exhaust pipe. .
  The regeneration burner device according to any one of claims 1 to 5, further comprising a first air pipe for supplying combustion air into the main fuel pipe.

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