TWI447331B - Combustion controll method for regenerative-combustion heat treat furnace - Google Patents

Description

Combustion control method for regenerative combustion type heat treatment furnace

The present application claims priority from Japanese Patent Application No. 2010-127569.

The present invention relates to a combustion control method for a regenerative combustion type heat treatment furnace, wherein the regenerative combustion type heat treatment furnace is provided with at least one pair of regenerative burners having a burner portion including a fuel gas supply pipe, a regenerator that accommodates the heat storage material, an air supply pipe that supplies combustion air to the regenerator, and an exhaust gas discharge pipe that exhausts the combustion exhaust gas from the regenerator, and passes through the regenerator from the air supply pipe in one of the regenerative burners The combustion air is guided to the burner unit, and the fuel gas is injected from the fuel gas supply pipe of the burner unit to perform the combustion operation. On the other hand, in the other regenerative burner, the combustion exhaust gas is guided to the above. In the regenerator, the heat of the combustion exhaust gas is accumulated in the heat storage operation of the heat storage material and discharged from the exhaust gas discharge pipe, and the combustion operation and the heat storage operation of the pair of regenerative burners are alternately switched. In particular, in the above-described regenerative combustion type heat treatment furnace, the supply amount of the fuel gas supplied from the fuel gas supply pipes of the regenerative burners and the supply amount of the combustion air supplied from the air supply pipe are provided. It is fixed, and proper combustion can be performed stably.

Conventionally, when heat-treating a material to be processed, a regenerative combustion type heat treatment furnace provided with at least one pair of regenerative burners having a burner portion including a fuel gas supply pipe is used. a regenerator for accommodating the heat storage material, an air supply pipe for supplying combustion air to the regenerator, and an exhaust gas discharge pipe for discharging the combustion exhaust gas from the regenerator, and passing through the air supply pipe in one of the regenerative burners The regenerator guides the combustion air to the burner unit, and injects the fuel gas from the fuel gas supply pipe of the burner unit to perform the combustion operation, and in the other regenerative burner, guides the combustion exhaust gas. In the regenerator, the heat of the combustion exhaust gas is accumulated in the heat storage material and then discharged from the exhaust gas discharge pipe, and the combustion operation and the heat storage operation of the pair of regenerative burners are alternately switched.

Further, in the above-described regenerative combustion type heat treatment furnace, in order to continuously heat-treat the material to be processed, a plurality of regenerative burners are provided in the heat treatment furnace, and switching combustion operation and heat storage operation are performed in each pair of regenerative burners. The time points are different in construction.

Further, in the above-described regenerative combustion type heat treatment furnace, when fuel gas is supplied to the fuel gas supply pipes of the respective regenerative burners, fuel gas is generally supplied to each fuel from a fuel gas supply device that supplies a certain amount of fuel gas. Gas supply pipe.

Here, in the above-described regenerative combustion type heat treatment furnace, the combustion operation and the heat storage operation of the pair of regenerative burners are alternately switched, and conventionally known as Japanese Patent Laid-Open No. Hei 10-185176 and Japanese Patent Application Laid-Open No. Hei 11-159744 In the regenerative burner in the combustion operation, after the supply of the fuel gas in the fuel gas supply pipe is stopped, the supply of the combustion air in the air supply pipe is stopped, and the regenerative type in the heat storage operation is performed. After the supply of the combustion air of the air supply pipe is started in the burner, the supply of the fuel gas of the fuel gas supply pipe is started.

However, in the above-described regenerative combustion type heat treatment furnace, a plurality of regenerative burners are provided, and in each pair of regenerative burners, the time at which the combustion operation and the heat storage operation are switched are different, and a certain amount of fuel is supplied from the fuel gas supply device. In the case where the gas is supplied to the regenerative combustion type heat treatment furnace of each of the fuel gas supply pipes, in the pair of regenerative burners to be switched between the combustion operation and the heat storage operation, the fuel gas supplied after passing through the fuel gas supply pipe as described above As a result of the temporary stop of the amount, the amount of fuel gas supplied from the fuel gas supply device to the fuel gas supply pipe of the other regenerative burner increases. As a result, in other regenerative burner pairs, the ratio of the fuel gas to the combustion air becomes high, so that the combustion state is changed, and there is a problem that stable combustion cannot be stably performed. In particular, when a gas having poor combustibility is used as the gas, for example, when propane gas is used as the fuel, when the ratio of the propane gas phase to the combustion air is high, black smoke (coal) is generated due to incomplete combustion, and thus there is an environment. The problem is that the coal is attached to the material to be treated and the heat treatment cannot be properly performed.

An object of the present invention is to solve the above-described problems of a regenerative combustion type heat treatment furnace which is provided as follows, wherein the regenerative combustion type heat treatment furnace is provided with at least one pair of regenerative burners having a fuel gas a burner unit of the supply pipe, a regenerator for storing the heat storage material, an air supply pipe for supplying combustion air to the regenerator, and an exhaust gas discharge pipe for discharging the combustion exhaust gas from the regenerator, in one of the regenerative burners The combustion air is guided from the air supply pipe to the burner portion through the regenerator, and the fuel gas is injected from the fuel gas supply pipe of the burner portion to perform the combustion operation, and on the other hand, in the other regenerative burner. The heat storage operation of guiding the combustion exhaust gas to the regenerator and accumulating the heat of the combustion exhaust gas in the heat storage material and discharging it from the exhaust gas discharge pipe, and mutually switching the combustion operation and the heat storage operation of the pair of regenerative burners.

In other words, in the above-described combustion operation and heat storage operation of the pair of regenerative burners, the supply amount of the fuel gas supplied from the fuel gas supply pipes of the regenerative burners and the The supply amount of the combustion air supplied from the air supply pipe is fixed, and proper combustion can be stably performed.

In order to solve the above-described problems, in the combustion control method of the regenerative combustion type heat treatment furnace according to the present invention, the regenerative combustion type heat treatment furnace is provided with at least one pair of regenerative burners having fuel gas a burner unit of the supply pipe, a regenerator for storing the heat storage material, an air supply pipe for supplying combustion air to the regenerator, and an exhaust gas discharge pipe for discharging the combustion exhaust gas from the regenerator, in one of the regenerative burners The combustion air is guided from the air supply pipe to the burner portion through the regenerator, and the fuel gas is injected from the fuel gas supply pipe of the burner portion to perform the combustion operation, and on the other hand, in the other regenerative burner. And a heat storage operation of guiding the combustion exhaust gas to the regenerator and accumulating the heat of the combustion exhaust gas in the heat storage material and discharging the same from the exhaust gas discharge pipe, and mutually switching the combustion operation and the heat storage operation of the pair of regenerative burners, the combustion The control method is characterized in that when the combustion operation and the heat storage operation of the pair of regenerative burners are to be switched, the combustion is performed. In the regenerative burner in operation, the supply amount of the fuel gas in the fuel gas supply pipe and the supply amount of the combustion air in the air supply pipe are reduced from the normal combustion state, and the regenerative combustion in the heat storage operation is performed. In the apparatus, the supply amount of the fuel gas of the fuel gas supply pipe and the supply amount of the combustion air of the air supply pipe are increased from a stopped state to supply the fuel gas supplied from the fuel gas supply pipe in the pair of regenerative burners. The supply amount and the supply amount of combustion air supplied from the air supply pipe are fixed.

Here, when the combustion operation and the heat storage operation of the pair of regenerative burners are to be switched as described above, in the regenerative burner in the combustion operation, the supply amount of the fuel gas in the fuel gas supply pipe and the air supply pipe are provided. The amount of supply of combustion air is reduced. On the other hand, in the regenerative burner during the heat storage operation, the supply amount of the fuel gas in the fuel gas supply pipe and the supply amount of the combustion air in the air supply pipe are increased. When the supply amount of the fuel gas supplied from the fuel gas supply pipe and the supply amount of the combustion air supplied from the air supply pipe are constant in the pair of regenerative burners, even when the combustion operation and the heat storage operation are switched, By the pair of regenerative burners, the amount of fuel gas supplied to the regenerative combustion type heat treatment furnace and the amount of combustion air and the ratio thereof can be made constant, and appropriate combustion can be stably performed.

Here, in the above-described regenerative combustion type heat treatment furnace, a plurality of regenerative burners may be used, and the time at which the combustion operation and the heat storage operation are switched may be different in each pair of regenerative burners.

Further, in the combustion control method of the regenerative combustion type heat treatment furnace of the present invention, the fuel gas can be supplied to the fuel gas supply pipe of each of the regenerative burners from the fuel gas supply means that supplies a certain amount of fuel gas. In this case, the supply amount of the fuel gas supplied from the fuel gas supply pipe and the supply from the air supply pipe may be provided in a pair of regenerative burners in which the combustion operation and the heat storage operation are switched as described above. Since the supply amount of the combustion air is constant, a certain amount of fuel gas and combustion air can be supplied to the regenerative combustion type heat treatment furnace.

Further, even if a plurality of pairs of regenerative burners are provided in the regenerative combustion type heat treatment furnace as described above, and the time at which the switching combustion operation and the heat storage operation are performed in each of the regenerative burners is different, the above-described operation may be performed as described above. A pair of regenerative burners that switch between the combustion operation and the heat storage operation supply a certain amount of fuel gas and combustion air, and as a result, the fuel gas supplied from the fuel gas supply device to the fuel gas supply pipe of the other regenerative burner pair The amount does not increase, even in other regenerative burner pairs, the ratio of fuel gas to combustion air is kept constant.

Further, in the combustion control method of the regenerative combustion type heat treatment furnace according to the present invention, when the combustion operation and the heat storage operation of the pair of regenerative burners are to be switched, it is preferable to make the fuel gas in the regenerative burner in the combustion operation. After the supply of the fuel gas of the supply pipe and the supply of the combustion air of the air supply pipe are stopped, the combustion exhaust gas is discharged from the exhaust gas discharge pipe, and on the other hand, the regenerative burner in the heat storage operation is discharged from the exhaust gas discharge pipe. After the operation of burning the exhaust gas is stopped, the supply of the fuel gas of the fuel gas supply pipe and the supply of the combustion air of the air supply pipe are started. In this way, when the combustion operation and the heat storage operation are to be switched, it is possible to reliably prevent the part of the combustion air that is guided from the air supply pipe to the regenerator from traveling to the regenerator while the switching operation by the switching valve is being performed. After that, it is discharged through the exhaust gas discharge pipe so that the ratio of the fuel gas supplied to the heat storage combustion type heat treatment furnace to the combustion air forms a more stable state.

In the combustion control method of the regenerative combustion type heat treatment furnace according to the present invention, when the combustion operation and the heat storage operation of the pair of regenerative burners are switched as described above, the fuel gas supply pipe is used in the regenerative burner in the combustion operation. The supply amount of the fuel gas and the supply amount of the combustion gas of the air supply pipe are reduced. On the other hand, in the regenerative burner in the heat storage operation, the supply amount of the fuel gas in the fuel gas supply pipe and the air supply are provided. The supply amount of the combustion air is increased, so that the supply amount of the fuel gas supplied from the fuel gas supply pipe and the supply amount of the combustion air supplied from the air supply pipe are constant in the entire pair of regenerative burners. Therefore, even when the combustion operation and the heat storage operation are switched, a certain amount of fuel gas and combustion air can be supplied into the heat storage combustion type heat treatment furnace.

As a result, when the combustion operation and the heat storage operation of the pair of regenerative burners are to be switched, the change in the combustion state in the regenerative combustion type heat treatment furnace can be suppressed, and appropriate combustion can be stably performed.

Further, even when fuel gas is supplied from the fuel gas supply device that supplies a certain amount of fuel gas to the fuel gas supply pipe of each of the regenerative burners, one of switching between the combustion operation and the heat storage operation as described above can be performed. In the regenerative burner, a certain amount of fuel gas and combustion air are supplied to the regenerative combustion type heat treatment furnace, so that the total amount of fuel gas supplied from the fuel gas supply device to each regenerative burner does not change, but Proper combustion is carried out steadily.

Further, even when a plurality of pairs of regenerative burners are provided in the regenerative combustion type heat treatment furnace, and the time at which the combustion operation and the heat storage operation are switched between the respective regenerative burners are different, the fuel gas supply device is supplied to the other as described above. The amount of fuel gas in the fuel gas supply pipe of the regenerative burner pair does not increase, and even in other regenerative burner pairs, the ratio of the fuel gas to the combustion air is kept constant, and can be stably performed appropriately. Burning. Therefore, even when the fuel gas supplied from the fuel gas supply pipe is a propane gas or the like which is poor in flammability, the generation of black smoke (coal) can be prevented, and there is no environmental problem or coal adhesion. In the case of the material to be treated.

Hereinafter, a combustion control method of a regenerative combustion type heat treatment furnace according to an embodiment of the present invention will be specifically described with reference to the drawings. In addition, the combustion control method of the regenerative combustion type heat treatment furnace of the present invention is not limited to the embodiment described below, and can be appropriately modified without departing from the scope of the invention.

Here, in this embodiment, as shown in FIG. 1, the material to be processed 1 composed of steel material is guided to the heat storage combustion type heat treatment furnace 10 from the inlet 11 of the heat storage combustion type heat treatment furnace 10, and the beam 2 is used. The heat treatment is carried out in the heat storage combustion type heat treatment furnace 10, and the material to be treated 1 thus subjected to the heat treatment is taken out from the heat storage combustion type heat treatment furnace 10 through the outlet 12 of the heat storage combustion type heat treatment furnace 10.

Next, in the above-described heat storage combustion type heat treatment furnace 10, a pair of regenerative burners 20 having a burner portion 21 and a regenerator 22 are opposed to each other along the above-described treatment. In the direction of movement of the material 1, four pairs of regenerative burners 20 are provided in the regenerative combustion type heat treatment furnace 10, and fuel is supplied to the burner portion 21 of each regenerative burner 20 from a fuel gas supply device 30 that supplies a certain amount of fuel gas. gas.

In the above-described pair of regenerative burners 20, as shown in Fig. 3, in one of the regenerative burners 20a, an air supply pipe for supplying combustion air to the regenerators 22a in which the heat storage materials 23a are accommodated is provided. The air supply valve 25a of 24a is opened, and the gas discharge valve 27a provided in the exhaust gas discharge pipe 26a that discharges the combustion exhaust gas through the regenerator 22a is closed, and the heat storage material 23a accommodated in the heat storage chamber 22a is closed. The combustion air that has been guided to the inside of the regenerator 22a by the air supply pipe 24a is heated.

Next, the combustion air thus heated is supplied to the burner portion 21a, and the gas supply valve 29a that introduces the fuel gas to the fuel gas supply pipe 28a provided at the center of the burner portion 21a is opened to make the fuel The fuel gas supplied from the gas supply device 30 is injected from the fuel gas supply pipe 28a, and a combustion operation for burning the fuel gas in the thermal storage combustion type heat treatment furnace 10 is performed.

On the other hand, in the other regenerative burner 20b, the gas supply valve 29b that supplies the fuel gas to the fuel gas supply pipe 28b and the air supply valve 25b provided in the air supply pipe 24b are closed and are not burned. On the other hand, the gas discharge valve 27b provided in the exhaust gas discharge pipe 26b that discharges the combustion exhaust gas through the regenerator 22b is opened.

Then, the combustion exhaust gas after being burned in the regenerative combustion type heat treatment furnace 10 as described above is guided to the regenerator 22b, and the heat of the combustion exhaust gas is accumulated in the heat storage material 23b accommodated in the regenerator 22b, and then the combustion exhaust gas is made. The heat storage operation is discharged to the outside through the exhaust gas discharge pipe 26b.

Next, in the pair of regenerative burners 20a and 20b, the combustion operation and the heat storage operation as described above are alternately performed.

Further, in each of the pair of regenerative burners 20, as described above, the above-described combustion operation and heat storage operation are alternately switched in the respective pair of regenerative burners 20a and 20b, and in each pair of regenerative burners 20, The timing at which the combustion operation and the heat storage operation are switched is different.

Next, an operation of switching the combustion operation and the heat storage operation of each of the pair of regenerative burners 20a and 20b in each of the pair of regenerative burners 20 described above will be described based on the timing chart shown in FIG.

Here, when the combustion operation and the heat storage operation are to be switched, the operation of closing the air supply valve 25a and the gas supply valve 29a in the open state in the regenerative burner 20a during the combustion operation is started, so that the air supply pipe is closed. The amount of combustion air supplied to the burner portion 21a through the regenerator 22a is gradually decreased, and the amount of fuel gas injected from the fuel gas supply pipe 28a is gradually decreased.

When the air supply valve 25a and the gas supply valve 29a are closed and the combustion air and the fuel gas are no longer supplied to stop the combustion, the gas discharge valve 27a in the closed state is opened to be guided to the heat storage. The heat of the combustion exhaust gas in the chamber 22a is accumulated in the heat storage material 23a accommodated in the heat storage chamber 22a, and then the combustion exhaust gas is discharged to the outside through the exhaust gas discharge pipe 26a.

On the other hand, in the regenerative burner 20b in the heat storage operation, the gas discharge valve 27b in the open state is closed, and the operation of discharging the combustion exhaust gas to the outside through the exhaust gas discharge pipe 26b is stopped. At the same time as the operation of closing the air supply valve 25a and the gas supply valve 29a of the regenerative burner 20a, the operation of opening the air supply valve 25b and the gas supply valve 29b in the closed state is started, so that heat is stored from the air supply pipe 24b. The amount of combustion air supplied to the burner portion 21b of the chamber 22b is gradually increased, and the amount of the fuel gas injected from the fuel gas supply pipe 28b is gradually increased to start combustion.

Here, the opening and closing operations of the air supply valves 25a and 25b and the gas supply valves 29a and 29b are usually required for several seconds. Therefore, during this period, the combustion air of the regenerative burner 20a during the combustion operation must be The amount of decrease in the fuel gas and the amount of increase in the combustion air and the fuel gas in the regenerative burner 20b during the heat storage operation are controlled to be constant. In the fourth embodiment, the operation of closing the air supply valve 25a and the gas supply valve 29a and the operation of opening the other air supply valve 25b and the gas supply valve 29b are started simultaneously, and the operation is started. It takes the same amount of time to move.

Here, the pair of regenerative burners 20a and 20b are such that the supply amount of the entire fuel gas supplied from the respective fuel gas supply pipes 28a and 28b and the combustion supplied from the air supply pipes 24a and 24b are as described above. The total supply of air does not change, but a certain amount of fuel gas and combustion air can be supplied.

In this manner, even when the combustion operation and the heat storage operation of the pair of regenerative burners 20a and 20b are switched, the amount of fuel gas supplied to the regenerative combustion type heat treatment furnace 10 and the amount of combustion air and the ratio thereof are constant. It can be stably burned appropriately.

Further, as described above, the regenerative combustion type heat treatment furnace 10 is provided with a plurality of regenerative burners 20, and the fuel gas is supplied from the fuel gas supply means 30 supplying a certain amount of fuel gas to the respective fuel gases of the respective pairs of regenerative burners 20. In the case of the supply pipes 28a and 28b, even when the combustion operation and the heat storage operation of the pair of regenerative burners 20a and 20b are switched as described above, the fuel is supplied to the entire pair of regenerative burners 20a and 20b. When the supply amount of the fuel gas supplied from the gas supply pipes 28a and 28b is constant, the amount of the fuel gas supplied from the fuel gas supply device 30 to each of the fuel gas supply pipes 28a and 28b of the other regenerative burners 20 is not Changed.

Therefore, when the combustion operation and the heat storage operation of the pair of regenerative burners 20a and 20b are switched, in the other regenerative burners 20, the combustion state is changed without increasing the ratio of the fuel gas to the combustion air. In the case where the fuel gas is a propane gas or the like which is inferior in flammability, black smoke (coal) is not generated as a result of incomplete combustion, and environmental problems are caused, or coal is attached to the material to be treated. In the case where the heat treatment cannot be performed properly, appropriate combustion can be stably performed.

Further, in the regenerative burner 20a that performs the combustion operation, when the air supply valve 25a and the gas supply valve 29a are closed as described above, the combustion air and the fuel gas are no longer supplied, and the combustion is stopped, and the shutdown state is performed. When the gas discharge valve 27a is opened, it is possible to prevent a part of the combustion air guided to the regenerator 22a from the air supply pipe 24a from traveling to the regenerator 22a and passing therethrough, and discharging it through the exhaust gas discharge pipe 26a.

In the regenerative burner 20b that performs the heat storage operation, when the gas discharge valve 27b in the open state is closed as described above, when the air supply valve 25b and the gas supply valve 29b in the closed state are opened, the slave can be prevented from being opened. A part of the combustion air that is guided to the regenerator 22b by the air supply pipe 24b does not travel to the regenerator 22b and passes by, and is discharged through the exhaust gas discharge pipe 26b.

As a result, it is possible to prevent the proportion of the combustion air supplied to the regenerative combustion type heat treatment furnace 10 from decreasing, and to make the ratio of the fuel gas and the combustion air supplied to the regenerative combustion type heat treatment furnace 10 to a more constant state, and to stably stabilize Perform a more appropriate combustion.

1. . . Material to be treated

2. . . Beam

10. . . Regenerative combustion type heat treatment furnace

11. . . Entrance

12. . . Export

20, 20a, 20b. . . Regenerative burner

21, 21a, 21b. . . Burner department

22, 22a, 22b. . . Regenerator

23a, 23b. . . Heat storage material

24a, 24b. . . Air supply pipe

25a, 25b. . . Air supply valve

26a, 26b. . . Exhaust gas exhaust pipe

27a, 27b. . . Gas discharge valve

28a, 28b. . . Fuel gas supply pipe

29a, 29b. . . Gas supply valve

30. . . Fuel gas supply device

1 is a schematic cross-sectional view showing an internal state of a regenerative combustion type heat treatment furnace in a combustion control method of a regenerative combustion type heat treatment furnace according to an embodiment of the present invention.

Fig. 2 is a schematic plan view of the above-described regenerative combustion type heat treatment furnace in the embodiment.

Fig. 3 is a schematic explanatory view showing a state in which the combustion operation is performed by one of the regenerative burners of one of the regenerative burners, and the heat storage operation is performed by the other regenerative burner.

Fig. 4 is a timing chart showing the operation of switching the combustion operation and the heat storage operation in each of the regenerative burners of the respective pairs of regenerative burners in the embodiment.

20a, 20b. . . Regenerative burner

Claims (4)

A combustion control method for a regenerative combustion type heat treatment furnace, wherein the regenerative combustion type heat treatment furnace is provided with at least one pair of regenerative burners, the regenerative burner having a burner portion including a fuel gas supply pipe for accommodating the heat storage material a regenerator, an air supply pipe that supplies combustion air to the regenerator, and an exhaust gas discharge pipe that exhausts the combustion exhaust gas from the regenerator; in one of the regenerative burners, the combustion air is passed from the air supply pipe through the regenerator Leading to the burner unit, and injecting fuel gas from the fuel gas supply pipe of the burner unit to perform a combustion operation, and in the other regenerative burner, guiding the combustion exhaust gas to the regenerator and The heat of the combustion exhaust gas accumulates in the heat storage operation of the heat storage material and then discharged from the exhaust gas discharge pipe, and alternately switches the combustion operation and the heat storage operation of the pair of regenerative burners, wherein the combustion control method is characterized in that the pair is to be switched In the combustion operation and the heat storage operation of the regenerative burner, the fuel gas is used in the regenerative burner in the combustion operation The supply amount of the fuel gas of the supply pipe and the supply amount of the combustion air of the air supply pipe are reduced from the normal combustion state, and on the other hand, in the regenerative burner in the heat storage operation, the fuel gas of the fuel gas supply pipe is made The supply amount and the supply amount of the combustion air of the air supply pipe are increased from the stopped state, and the supply amount of the fuel gas supplied from the fuel gas supply pipe in the pair of regenerative burners and the supply from the air supply pipe are supplied. The supply amount of the combustion air is made constant, and the fuel gas is supplied to the fuel gas supply pipe of each of the above-described regenerative burners from a fuel gas supply device that supplies a certain amount of fuel gas. A combustion control method for a regenerative combustion type heat treatment furnace, wherein the regenerative combustion type heat treatment furnace is provided with at least one pair of regenerative burners, the regenerative burner having a burner portion including a fuel gas supply pipe for accommodating the heat storage material a regenerator, an air supply pipe that supplies combustion air to the regenerator, and an exhaust gas discharge pipe that exhausts the combustion exhaust gas from the regenerator; in one of the regenerative burners, the combustion air is passed from the air supply pipe through the regenerator Leading to the burner unit, and injecting fuel gas from the fuel gas supply pipe of the burner unit to perform a combustion operation, and in the other regenerative burner, guiding the combustion exhaust gas to the regenerator and The heat of the combustion exhaust gas accumulates in the heat storage operation of the heat storage material and then discharged from the exhaust gas discharge pipe, and alternately switches the combustion operation and the heat storage operation of the pair of regenerative burners, wherein the combustion control method is characterized in that the pair is to be switched In the combustion operation and the heat storage operation of the regenerative burner, the fuel gas is used in the regenerative burner in the combustion operation The supply amount of the fuel gas of the supply pipe and the supply amount of the combustion air of the air supply pipe are reduced from the normal combustion state, and on the other hand, in the regenerative burner in the heat storage operation, the fuel gas of the fuel gas supply pipe is made The supply amount and the supply amount of the combustion air of the air supply pipe are increased from the stopped state, and the supply amount of the fuel gas supplied from the fuel gas supply pipe in the pair of regenerative burners and the supply from the air supply pipe are supplied. The supply amount of the combustion air is constant, and in the regenerative burner in the combustion operation, after the supply of the fuel gas of the fuel gas supply pipe and the supply of the combustion air of the air supply pipe are stopped, the combustion exhaust gas is discharged from the exhaust gas. Tube discharge, on the other hand, during heat storage In the regenerative burner, after the operation of discharging the combustion exhaust gas from the exhaust gas discharge pipe is stopped, the supply of the fuel gas in the fuel gas supply pipe and the supply of the combustion air in the air supply pipe are started. The combustion control method of the regenerative combustion type heat treatment furnace according to the second aspect of the invention, wherein the fuel gas supply device supplies the fuel gas to the fuel gas supply of each of the regenerative burners from a fuel gas supply device that supplies a certain amount of fuel gas tube. The combustion control method of the regenerative combustion type heat treatment furnace according to any one of the first to third aspect, wherein the regenerative combustion type heat treatment furnace is provided with a plurality of regenerative burners, and each pair of regenerative heaters In the burner, the timing at which the combustion operation and the heat storage operation are switched is different.