JPH07119957A - Heat accumulation type burner - Google Patents

Abstract

PURPOSE:To enable a safe and efficient removal of heat within a furnace to be carried out by a method wherein either one of or both a first burner and a second burner is provided with a gas cooler for cooling discharged gas dispersed through a heat accumulating body. CONSTITUTION:When a heating operation is to be carried out, a first burner 1a and a second burner 1b are alternatively ignited. When the burner 1a is ignited, heat is accumulated in a heat accumulating body 6b with combustion discharged gas discharged from the burner 1b under no combustion, combustion air passing through the heat accumulating body 6b is preheated when the burner 1b is ignited and then a combustion cycle and a gas discharging cycle are alternatively repeated. During cooling operation, supplying of fuel to fuel nozzles 2a and 2b is stopped, pilot burners 5a and 5b are extinguished, air is supplied form the burner 1b not provided with any gas cooler 7 so as to cool the furnace. The burner 1a having the gas cooler 7 sucks atmosphere gas within the furnace to cause the gas to be passed through the gas cooler 7 through the heat accumulating body 6b and then the atmosphere gas within the furnace is cooled to a temperature lower than a heat-resistant temperature at a facility on the downstream side of the gas cooler 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerative burner used in a metal heating furnace or the like.

[0002]

2. Description of the Related Art In recent years, in industrial furnaces such as metal heating furnaces and heat treatment furnaces, a regenerative burner has been adopted in order to increase the thermal efficiency of the furnace, and one example thereof is JP-A-62-9470.
There are inventions disclosed in Japanese Patent No. 3 and Japanese Patent Application Laid-Open No. 2-10002.

The heat storage type burner described in Japanese Patent Laid-Open No. 2-10002 has a pair of a first burner and a second burner each having a heat storage body through which combustion air and combustion exhaust gas pass, and a pair or a plurality of burners. The pair of burner groups is arranged in one combustion chamber. Then, the first burner and the second burner are burned alternately, and the heat of the combustion exhaust gas passing through the heat storage body of the burner is transferred to the heat storage body when the burner is not burning,
The heat is stored, and the heat stored in the heat storage body at the time of combustion of the burner is removed from the combustion air passing therethrough and preheated, and the cycle is repeated.

Further, the heat storage type radiant tube burner described in JP-A-62-94703 has a pair of burners having a heat storage body through which combustion air and combustion exhaust gas pass, connected to both ends of the radiant tube. , The burner is burned alternately in the radiant tube, and the combustion exhaust gas is discharged from the other burner through the radiant tube, and the heat of the combustion exhaust gas that passes through the heat storage body of the burner is stored when it is not burning. The heat is transferred to and stored in the body, and the heat stored in the heat storage body during combustion is removed from the combustion air passing therethrough to be preheated.

[0005]

As described above, the heat storage type burner causes the heat of the combustion exhaust gas passing through the heat storage body of the burner when the burner is not combusting to be transferred to the heat storage body to store the heat. The heat stored in the regenerator during combustion repeats the cycle in which the passing combustion air is deheated and preheated, so the thermal efficiency of the regenerative burner is such that the temperature of the combustion exhaust gas after passing through the regenerator can be lowered. The more you improve, the better.
That is, the larger the heat storage capacity of the heat storage body, the higher the thermal efficiency. It is widely known that this heat storage heat exchange is in principle capable of highly efficient heat recovery.

However, in a furnace using a regenerative burner, when the temperature inside the furnace is rapidly lowered or the object to be heated in the furnace is cooled, especially, cooling air is supplied from the burner port by a combustion air supply system. When it is blown into the furnace, the heat storage body stores the heat removed from the furnace and preheats the cooling air blown into the furnace by this heat, so the so-called heat removal efficiency that removes heat from the furnace decreases. . Therefore, when the temperature inside the furnace is lowered, it takes time to use the conventional heat storage type burner.

If the burner is not switched and the air is blown into the furnace by flowing the air in a fixed direction,
On the suction side of the furnace atmosphere gas, heat is stored in the heat storage body by heat removal from the furnace, and when the heat storage body exceeds its heat storage capacity, the exhaust gas temperature on the heat storage body outlet side becomes almost equal to the furnace temperature,
The pipes and valves on the downstream side of the heat storage body (hereinafter, referred to as the upstream side or the downstream side based on the outflow direction of the combustion exhaust gas and the furnace atmosphere gas) may be destroyed. For this reason, it is necessary to make the various equipments on the downstream side of the heat storage body heat-resistant, which increases equipment costs.

Further, in the case of heating a steel material, the temperature inside the furnace is 130
If a heat resistant valve that can maintain heat resistance at about 0 ° C. is used, the valve becomes large and the opening / closing operation becomes slow, so it is difficult to apply it to a heat storage burner.

Furthermore, equipment for cooling the furnace, that is,
Equipment that installs cooling air supply nozzles or cooling tubes and ancillary equipment is complicated and large in equipment cost,
Therefore, there are various problems such as a rise in equipment cost.

The present invention has been made to solve the above problems, and in a furnace using a regenerative burner, when the temperature inside the furnace is rapidly lowered or the object to be heated inside the furnace is cooled, The purpose of the present invention is to obtain a regenerative burner that can safely and efficiently remove heat from the furnace without the risk of enlarging the equipment or destroying the equipment.

[0011]

The heat storage burner according to the present invention is configured as follows in order to solve the above problems. (1) A first burner and a second burner are arranged as a pair, and one or more pairs of burner groups are arranged in one combustion chamber, and each burner has a heat storage body through which combustion air and combustion exhaust gas pass. , The first burner and the second burner are alternately burned, and the heat of the combustion exhaust gas passing through the heat storage body of the burner is transferred to and accumulated in the heat storage body when the burner is not burning, and when the burner burns. In a regenerative burner that repeats a cycle in which combustion air that passes through the heat stored in the regenerator is deheated and preheated, the regenerator is provided in either or both of the first burner and the second burner. A cooling means was provided for cooling the exhaust gas that passed through and was diffused.

(2) The first burner and the second burner are paired to form a pair or a plurality of pairs of burner groups in one combustion chamber, and each burner has a heat storage body through which combustion air and combustion exhaust gas pass. The first burner and the second burner are alternately burned, and the heat of the combustion exhaust gas passing through the heat storage body of the burner when the burner is not burning is transferred to and stored in the heat storage body. In a regenerative burner that repeats a cycle in which the combustion air passing through the heat stored in the regenerator during combustion is deheated and preheated, one or both of the first burner and the second burner, A bypass pipe for bypassing combustion exhaust gas or combustion air is provided in the heat storage body, and a cooling means for cooling the exhaust gas is provided in the bypass pipe.

(3) One or a plurality of pairs of burner groups each having a first burner and a second burner as a pair are arranged in one combustion chamber, and each burner has a heat storage body through which combustion air and combustion exhaust gas pass. The first burner and the second burner are alternately burned, and the heat of the combustion exhaust gas passing through the heat storage body of the burner when the burner is not burning is transferred to and stored in the heat storage body. In a regenerative burner that repeats a cycle in which the combustion air passing through the heat stored in the heat storage body is deheated and preheated during combustion, the first burner and the second burner, or both of them, A replacement means was provided for replacing the heat storage body and the cooling means for cooling the exhaust gas sucked and diffused from the burner port.

(4) A burner having a heat storage body through which combustion air and combustion exhaust gas pass is arranged at both ends of the radiant tube, the burners are burned alternately, and the heat storage body of the burner is burned when the burner is not burning. A heat storage type radiant tube burner that repeats a cycle in which the heat of the passing combustion exhaust gas is transferred to the heat storage body to store the heat, and the combustion air passing through the heat stored in the heat storage body is removed and preheated during combustion of the burner. In either or both of the burners arranged at both ends of the radiant tube,
A cooling unit was provided for cooling the exhaust gas that passed through the heat storage body and was diffused.

(5) A burner having a heat storage body through which combustion air and combustion exhaust gas pass is arranged at both ends of the radiant tube, and the burners are burned alternately, and the burner passes through the heat storage body of the burner when the burner is not burning. In the heat storage type radiant tube burner which repeats a cycle in which the heat of the combustion exhaust gas to be transferred to the heat storage body is stored, and the combustion air passing through the heat stored in the heat storage body during combustion of the burner is deheated and preheated, Either or both of the burners arranged at both ends of the radiant tube are provided with a bypass pipe through which the combustion exhaust gas or combustion air can bypass the heat storage body, and a cooling means for cooling the exhaust gas is provided in the bypass pipe. .

(6) A burner having a heat storage body through which combustion air and combustion exhaust gas pass is arranged at each of both ends of the radiant tube, the burners are alternately burned, and the heat storage of the burner is performed when the burner is not burning. A heat storage radiant tube that repeats a cycle in which the heat of the combustion exhaust gas passing through the body is transferred to the heat storage body to store the heat, and the combustion air passing through the heat stored in the heat storage body during combustion of the burner is removed and preheated. In the burner, replacement means is provided in either or both of the burners arranged at both ends of the radiant tube for replacing the heat storage body and a cooling means for cooling the exhaust gas sucked and diffused from the burner port.

(7) In the regenerative burner of the above (1) to (6), when the furnace temperature is lowered or the object to be heated in the furnace is cooled, the exhaust gas cooling means is used. did.

[0018]

[Action]

(1) In the regenerative burner of the above (1), when heating, the first and second burners are alternately burned, and the combustion exhaust gas discharged from the non-burning burner stores heat in the regenerator, and when the burner burns. The combustion air passing through the heat storage body is preheated, and the combustion and exhaust cycles are alternately repeated. When lowering the furnace temperature or cooling the object to be heated in the furnace (hereinafter referred to as cooling)
Stops the supply to the fuel nozzle, extinguishes the pilot burner, and supplies air from the burner on the side not provided with cooling means to cool the furnace. The burner on the side provided with the cooling means sucks the atmosphere gas in the furnace, passes the cooling means through the heat storage body, and cools the temperature of the atmosphere gas in the furnace to a temperature not higher than the heat resistant temperature of the equipment on the downstream side of the cooling means. .

(2) The operation of the heat storage type burner of the above (2) at the time of heating is the same as that of the above (1). At the time of cooling, the pipeline to the heat storage body on the side provided with the cooling means is closed, and the atmosphere gas in the furnace is passed through the cooling means through the bypass pipe to be cooled.

(3) In the regenerative burner of the above (3), the regenerator is inserted into the burner side at the time of heating, and the burner is alternately burned in the same manner as in the above (1). At the time of cooling, the cooling means is inserted into the burner side to cool the atmosphere gas in the furnace in the same manner as in the above (1).

(4) The regenerative burners of (4), (5), and (6) described above blow combustion air from the burner into the radiant tube for combustion, and the non-combustion burner burns from the radiant tube. Emit exhaust gas. The action of alternating combustion of both burners is the same as in the above cases (1), (2) and (3). At the time of cooling, air is blown into the radiant tube from the burner on the side not equipped with the cooling means to cool the inside of the furnace, and the atmosphere gas inside the furnace in the radiant tube is sucked and the above (1), (2), (3) As in the case of, the cooling means cools.

(5) In the regenerative burner of (7), when the furnace temperature is rapidly lowered or the object to be heated in the furnace is cooled, the exhausted atmosphere gas in the furnace is changed to the above (1) to (). It cools by the cooling means of 4).

[0023]

【Example】

First Embodiment FIG. 1 is a schematic diagram showing the configuration of a first embodiment of a heat storage type burner according to the present invention. In the figure, 1a is a first burner, 1b is a second burner, and both burners 1a and 1b are provided.
And one or more pairs of burner groups are installed in one combustion chamber 20 of the furnace. 2a and 2b are first and second
Fuel is supplied from the fuel pipe 3 through the fuel supply cutoff valves 4a and 4b by the fuel nozzles provided near the burner ports of the burners 1a and 1b. 5a and 5b are pilot burners to which pipes (not shown) for supplying fuel and air are connected.

6a and 6b are heat storage bodies provided in pipe lines 8a and 8b for supplying combustion air to both burners 1a and 1b and discharging combustion exhaust gas, 7 on the downstream side of the fuel nozzles 2a and 2b. On the downstream side of the heat storage body 6b of the second burner 1b, a gas cooler provided in the pipe line 8b allows cooling water to pass therethrough. Reference numeral 9 is a pipeline 8a, 8b
Is a four-way switching valve for selectively switching and connecting the combustion air system and the combustion exhaust gas system.
And an exhaust gas discharge path 11.

In the present embodiment configured as described above,
At the time of heating, the four-way switching valve 9 alternately switches the combustion air system and the combustion exhaust gas system to alternately burn the first burner 1a and the second burner 1b, and one burner (for example, the first burner). 1a) during combustion, the heat of the combustion exhaust gas discharged through the heat storage body 6b of the non-combustion second burner 1b is transferred to the heat storage body 6b to store the heat.
The combustion air passing therethrough is preheated by removing the heat stored in the heat storage body 6b during the combustion of b. In this way
The first burner 1a and the second burner 1b alternately repeat the cycle of combustion and exhaust, and perform alternating combustion.

During the heating, no cooling water is passed through the gas cooler 7, and the pilot burners 5a, 5
The b may be ignited or extinguished in synchronization with the combustion and stop of the first and second burners 1a and 1b, or may be always burned. Further, in this embodiment, the combustion air is supplied by a forced air blower (not shown), and the combustion exhaust gas is sucked and exhausted by an exhaust gas suction blower (not shown).

At the time of cooling, that is, when the temperature in the furnace is rapidly lowered or the object to be heated in the furnace is cooled, the fuel supply cutoff valves 4a and 4b are closed to supply the fuel to the fuel nozzles 2a and 2b. Stop the pilot burner 5a, 5
The fuel supply to b is also stopped to extinguish the fire. Then, the four-way switching valve 9 is switched and fixed so that the combustion air is supplied to the pipe line 8a on the side not equipped with the gas cooler 7, and thus the first burner 1a, and the first burner 1a is connected to the furnace. Air is supplied to cool the furnace.

On the other hand, the side of the second burner 1b equipped with the gas cooler 7 sucks the atmosphere gas in the furnace and passes the gas cooler 7 through the heat storage body 6b. At this time, the cooling water is passed through the gas cooler 7, and the in-furnace atmosphere gas passing therethrough is cooled to a temperature not higher than the heat-resistant temperature of the equipment on the downstream side and discharged to prevent equipment destruction.

Water may be passed to the gas cooler 7 only during cooling as in this embodiment, or may be always passed. However, in the case of always passing water, the combustion passed through the heat storage body 6b at the time of combustion. Exhaust gas has a low temperature of 300 ° C. or lower, and further lowers as it passes through the gas cooler 7. Therefore, if sulfur is contained in the combustion exhaust gas, dew condensation may occur on the downstream side of the gas cooler 7. Corrosion measures are required.

Further, in cooling the atmosphere gas in the furnace, it is possible to install a device for blowing air or other gas at room temperature or lower into the furnace instead of the gas cooler 7. However, since the gas has a small heat capacity, it cannot be cooled to the required temperature unless the gas is blown in several times as much as the exhaust gas sucked from the furnace. Therefore, a large-capacity gas blowing device and an exhaust gas suction blower having a capacity commensurate with the cooling capacity at the time of cooling the exhaust gas are required, which is not preferable because the equipment cost increases.

Embodiment 2 FIG. 2 is a schematic diagram of the second embodiment of the present invention. In this embodiment, the first burner 1a and the second burner 1b of the first embodiment are respectively connected to both ends of the radiant tube 12, and the first and second burners 1a and 1b are connected in the radiant tube 12. The combustion is performed alternately, and the combustion exhaust gas is discharged from the radiant tube to the burner on the non-combustion side. Other configurations and operations are the same as in the case of the first embodiment.

Embodiment 3 FIG. 3 is a schematic view of the third embodiment of the present invention. In this embodiment, the gas cooler 7 in the first embodiment is omitted, and bypass pipes 13 that connect to the pipe 8b are provided before and after the heat storage body 6b of the second burner 1b (upstream side and downstream side). A gas cooler 7 through which cooling water is passed is installed in the pipe line 13, and shutoff valves 14a and 14b are provided in the pipe line 8b on the downstream side of the heat storage body 6b and on the bypass pipe line 13 on the downstream side of the gas cooler 7, respectively. It is a thing. The shutoff valves 14a and 14b are used for the heat storage body 6b and the gas cooler 7
It may be provided on the upstream side of.

In this embodiment as described above, the shutoff valve 14a on the heat storage body 6b side is opened and the shutoff valve 14a on the gas cooler 7 side is closed during heating. Then, the heat of the combustion exhaust gas passing through the heat storage body 6b of the non-combustion burner (for example, the second burner 1b) is transferred to the heat storage body 6b by alternately burning the first burner 1a and the second burner 1b. Let it store heat, second
When the burner 1b is burned, the heat stored in the heat storage body 6b is removed from the combustion air passing therethrough to be preheated, thereby repeating the alternating combustion.

During cooling, the combustion supply cutoff valves 4a and 4b are closed to stop the fuel supply to the fuel nozzles 2a and 2b, and also to stop the fuel supply to the pilot burners 5a and 5b to extinguish the fire. Further, the shutoff valve 14a is closed to shut off the shutoff valve 14a.
While opening b, the four-way switching valve 9 is switched and fixed so that combustion air is supplied to the first burner 1a side.
Air is supplied from the burner 1a of No. 1 to the inside of the furnace to be cooled.

On the other hand, on the side of the second burner 1b, cooling water is passed through the gas cooler 7, and the in-furnace atmosphere gas is sucked by the exhaust gas suction blower to bypass the gas cooler 7 from the bypass line 13.
The exhaust gas is cooled to a temperature lower than the heat resistant temperature of the equipment downstream of the gas cooler 7 and discharged to prevent equipment damage.

Embodiment 4 FIG. 4 is a schematic diagram of the fourth embodiment of the present invention. In the present embodiment, the first burner 1a and the second burner 1b of the third embodiment are connected to both ends of the radiant tube 12, respectively, and other configurations and actions are the same as those of the third embodiment. It is almost the same.

Embodiment 5 FIG. 5 is a schematic view of the fifth embodiment of the present invention. In the present embodiment, a pipe 8b of the second burner 1b is provided with a cylindrical or prismatic guide 15 which is orthogonal to the pipe 8b and closed at both ends, and the heat storage body 6b and the cooling water are stored in the guide 15. A gas cooler 7 through which water is passed is arranged, both are integrally connected by a rod 19 or the like, and the heat storage body 6b is connected to a piston rod 18 of an air cylinder 16.

In the present embodiment constructed as described above,
At the time of heating, the piston 17 is moved forward to move the heat storage body 6b to the conduit 8
located within b, the first burner 1a and the second burner 1b
Are alternately burned to transfer heat to the heat storage body 6a or 6b by the combustion exhaust gas discharged from the non-combustion side conduit 8a or 8b to store heat, and to pass through the heat storage body 6a or 6b during combustion of the burner. Preheat the air.

During cooling, the piston 17 is retracted to position the gas cooler 7 in the pipe 8b as shown in the figure, and air is supplied into the furnace from the first burner 1a side according to the procedure described above. After cooling, the in-furnace atmosphere gas is sucked from the second burner 1b side to pass through the gas cooler 7 to be cooled. In the above description, the case where the gas cooler 7 is arranged above the figure and the heat storage body 6b is arranged below is shown, but the heat storage body 6b may be arranged above and the gas cooler 7 may be arranged below. Also,
Although the example in which the heat storage body 6b and the gas cooler 7 are driven by the air cylinder 16 has been shown, other driving means may be used.

Embodiment 6 FIG. 6 is a schematic diagram of the sixth embodiment of the present invention. In this embodiment, the first burner 1a and the second burner 1b of the fifth embodiment are connected to both ends of the radiant tube 12, respectively, and other configurations and actions are almost the same as those of the fifth embodiment. Is the same.

Embodiment 7 In each of the above embodiments, the case where the gas cooler 7 or the bypass pipe line 13 having the gas cooler 7, the heat storage body 6b, the gas cooler 7 and their driving means are provided on the side of the second burner 1b is shown. However, in this embodiment, these are the first burner 1
It is provided on the a side, or on both the first burner 1a side and the second burner 1b side.

In each of the above embodiments, the first burner and the second burner are used.
In the above, the case where the burners are installed in parallel on the furnace wall of the combustion chamber and alternately burned has been described. The present invention can also be applied to a regenerative burner which is designed to be burned in a heat storage type.

[0043]

As is apparent from the above description, according to the present invention, the first burner and the second burner are arranged as a pair, and a pair or a plurality of pairs of burner groups are arranged in one combustion chamber. Each has a heat storage body through which the combustion air and the combustion exhaust gas pass, the first burner and the second burner are burned alternately, and the heat of the combustion exhaust gas passing through the heat storage body of the burner when the burner is not burning. The heat storage type burner that repeats a cycle in which the heat is transferred to the heat storage body, heat is stored, and the combustion air passing through the heat stored in the heat storage body is removed and preheated during combustion of the burner, or both ends of the radiant tube. The burners having a heat storage body through which the combustion air and the combustion exhaust gas pass, respectively, are arranged, and the burners are alternately burned,
When the burner is not burning, the heat of the combustion exhaust gas passing through the heat storage body of the burner is transferred to the heat storage body to store the heat, and the combustion air passing through the heat stored in the heat storage body is removed during combustion of the burner. Since the heat storage type radiant tube burner that repeats the predicted cycle is configured as follows, a remarkable effect can be obtained.

By providing the first burner and the second burner, or one or both of the burners arranged at both ends of the radiant tube with cooling means for cooling the exhaust gas passing through the heat storage body and being diffused. When the temperature inside the furnace is rapidly lowered or the object to be heated inside the furnace is cooled, there is no risk that the equipment will be enlarged or destroyed, and the heat in the furnace can be removed safely and efficiently. Became.

A bypass pipe line is provided to allow the combustion exhaust gas or the combustion air to bypass the heat storage bodies of either or both of the first burner and the second burner or the burners arranged at both ends of the radiant tube. By providing a cooling means for cooling the exhaust gas in the pipe line, when the temperature inside the furnace is rapidly lowered or the object to be heated inside the furnace is cooled, there is no risk of increasing the size of the equipment or destroying the equipment. In addition, the heat inside the furnace can be removed efficiently.

The first burner and the second burner or the heat storage bodies of one or both of the burners arranged at both ends of the radiant tube and cooling means for cooling the exhaust gas sucked and diffused from the burner port are inserted. By providing a replacement means for replacing, when the temperature inside the furnace is rapidly lowered or the object to be heated in the furnace is cooled, there is no risk of causing equipment upsizing or equipment destruction, and it is possible to safely and efficiently It has become possible to remove heat.

In the above regenerative burner, when the furnace temperature is rapidly lowered or the object to be heated in the furnace is cooled, the exhaust gas cooling means is used. Can be cooled to an appropriate temperature in a short time.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an outline of a configuration of a first exemplary embodiment of the present invention.

FIG. 2 is a schematic diagram showing an outline of a configuration of a second exemplary embodiment of the present invention.

FIG. 3 is a schematic diagram showing an outline of a configuration of a third exemplary embodiment of the present invention.

FIG. 4 is a schematic diagram showing an outline of a configuration of a fourth exemplary embodiment of the present invention.

FIG. 5 is a schematic diagram showing an outline of a configuration of a fifth exemplary embodiment of the present invention.

FIG. 6 is a schematic diagram showing an outline of the configuration of a sixth embodiment of the present invention.

[Explanation of symbols]

 1a 1st burner 1b 2nd burner 2a, 2b Fuel nozzle 6a, 6b Heat storage body 7 Gas cooler 8a, 8b Pipe line 9 Four-way switching valve 12 Radiant tube 13 Bypass pipe line 14a, 14b Shutoff valve 15 Guide 16 Air cylinder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryoichi Tanaka 2-153, Shirute, Tsurumi-ku, Yokohama-shi, Kanagawa Japan Furnace Industry Co., Ltd. No. 53 In Japan Furnace Industry Co., Ltd. (72) Inventor Atsushi Sudo 2 1-353 Shirate, Tsurumi-ku, Yokohama-shi, Kanagawa Japan Furnace Industry Co., Ltd.

Claims (7)

[Claims] 1. A pair or a plurality of pairs of burner groups each having a first burner and a second burner as a pair are arranged in one combustion chamber, and each burner has a heat storage body through which combustion air and combustion exhaust gas pass. The first burner and the second burner are alternately burned, and the heat of the combustion exhaust gas passing through the heat storage body of the burner is transferred to and accumulated in the heat storage body when the burner is not burning. In a regenerative burner that repeats a cycle in which combustion air passing through the heat stored in the regenerator during combustion is deheated and preheated, in either or both of the first burner and the second burner, A regenerative burner characterized by comprising cooling means for cooling the exhaust gas passing through the regenerator and being diffused. 2. A first burner and a second burner as a pair, and a pair or a plurality of pairs of burner groups are arranged in one combustion chamber, and each burner has a heat storage body through which combustion air and combustion exhaust gas pass. The first burner and the second burner are alternately burned, and the heat of the combustion exhaust gas passing through the heat storage body of the burner is transferred to and accumulated in the heat storage body when the burner is not burning. In a regenerative burner that repeats a cycle in which the combustion air that passes through the heat stored in the regenerator during combustion is deheated and preheated, one or both of the first burner and the second burner are provided with the heat storage. A regenerative burner characterized in that a bypass pipe for bypassing combustion exhaust gas or combustion air is provided to the body, and a cooling means for cooling the exhaust gas is provided in the bypass pipe. 3. A first burner and a second burner as a pair, and a pair or a plurality of pairs of burner groups are arranged in one combustion chamber, and each burner has a heat storage body through which combustion air and combustion exhaust gas pass. The first burner and the second burner are alternately burned, and the heat of the combustion exhaust gas passing through the heat storage body of the burner is transferred to and accumulated in the heat storage body when the burner is not burning. In a regenerative burner that repeats a cycle in which combustion air passing through the heat stored in the regenerator during combustion is deheated and preheated, in either or both of the first burner and the second burner, A regenerative burner characterized by comprising a replacement means for replacing a heat storage body and a cooling means for cooling exhaust gas sucked and emitted from the burner port. 4. A burner having a heat storage body through which combustion air and combustion exhaust gas pass, is arranged at both ends of the radiant tube, the burners are burned alternately, and the burner passes through the heat storage body when the burner is not burning. In the heat storage type radiant tube burner which repeats a cycle in which the heat of the combustion exhaust gas to be transferred to the heat storage body is stored, and the combustion air passing through the heat stored in the heat storage body during combustion of the burner is deheated and preheated. A heat storage burner characterized in that one or both of the burners arranged at both ends of the radiant tube are provided with cooling means for cooling exhaust gas passing through the heat storage body and being diffused. 5. A radiant tube is provided with burners each having a heat storage body through which combustion air and combustion exhaust gas pass, and the burners are burned alternately and passed through the heat storage body of the burner when the burner is not burning. In the heat storage type radiant tube burner which repeats a cycle in which the heat of the combustion exhaust gas to be transferred to the heat storage body is stored, and the combustion air passing through the heat stored in the heat storage body during combustion of the burner is deheated and preheated. In one or both of the burners arranged at both ends of the radiant tube, a bypass pipe that can bypass the exhaust gas or combustion air for the heat storage body is provided, and a cooling means for cooling the exhaust gas is provided in the bypass pipe. A heat storage type burner characterized by that. 6. A burner having a heat storage body through which combustion air and combustion exhaust gas pass is arranged at each of both ends of the radiant tube, the burners are burned alternately, and the heat storage body of the burner when the burner is not burning. A heat storage type radiant tube that repeats a cycle in which the heat of the combustion exhaust gas passing through the heat storage body is transferred to the heat storage body to store heat, and the combustion air passing through the heat stored in the heat storage body is removed and preheated. In the burner, one or both of the burners arranged at both ends of the radiant tube are provided with replacement means for replacing the heat storage body and a cooling means for cooling the exhaust gas sucked and diffused from the burner port. Regenerative burner characterized by. 7. The exhaust gas cooling means is used when lowering the furnace temperature or cooling an object to be heated in the furnace, claim 1, 2, 3, 4, 5 or 6. Regenerative burner.