JP2021148327A - Heat storage material cleaning device for heat storage type combustion device - Google Patents

Abstract

To efficiently remove the deposits adhering to the heat storage material housed in the heat storage unit while operating the heat storage type combustion device, at the same time, the removed dust can be easily processed and recovery is not required.SOLUTION: In removing the deposits adhering to a heat storage material x housed in heat storage units 12a and 12b of paired burners 10a and 10b, when the combustion air heated by the heat stored in the heat storage material housed in the heat storage unit is mixed with the fuel gas and burned in a furnace 1 by a burner, the heat storage material housed in the heat storage unit is vibrated by vibrating devices 20a and 20b to remove the deposits adhering to the heat storage material. The deposits removed from the heat storage material are mixed with the fuel gas together with the combustion air and burned in the furnace.SELECTED DRAWING: Figure 2

Description

In the present invention, the combustion air heated by the heat stored in the heat storage material stored in the heat storage unit in one burner is mixed with the fuel gas and burned in the furnace, while the fuel gas is burned in the other burner. Instead, the combustion exhaust gas after combustion in the furnace is guided to the heat storage material housed in the heat storage section so that the heat of the combustion exhaust gas is stored in the heat storage material, and the above-mentioned combustion and heat storage are alternately performed by each burner. The present invention relates to a heat storage material cleaning device of a heat storage type combustion device for cleaning the heat storage material housed in each heat storage unit in the heat storage type combustion device. In particular, while operating the heat storage type combustion device, the deposits such as dust adhering to the heat storage material housed in each heat storage unit can be efficiently removed, and the removed deposits can be easily treated. It is characterized by points.

Conventionally, in an industrial furnace or the like, one burner mixes combustion air heated by the heat stored in the heat storage material stored in the heat storage unit with fuel gas and burns it in the furnace, while the other burner. In, without burning the fuel gas, the combustion exhaust gas after combustion in the furnace is guided to the heat storage material housed in the heat storage unit to store the heat of the combustion exhaust gas in the heat storage material, and the above-mentioned combustion and heat storage are performed in each burner. A heat storage type combustion device is used in which the heat of the combustion exhaust gas is effectively utilized by alternately performing the combustion.

Here, in the above-mentioned heat storage type combustion apparatus, when the combustion exhaust gas after combustion is guided to the heat storage material housed in the heat storage unit and the heat of the combustion exhaust gas is stored in the heat storage material as described above, the dust contained in the combustion exhaust gas And scale etc. adhere to the heat storage material and accumulate, and the air permeability of the heat storage part decreases due to the deposits adhering to the heat storage material in this way, and it is sufficient to heat the combustion air with the heat storage material stored in the heat storage part. In addition, the speed at which the combustion exhaust gas passes through the heat storage section containing the heat storage material becomes slower, and dust and scale contained in the combustion exhaust gas are more likely to adhere to the heat storage material. There was a problem that it had to be replaced at an early stage.

Here, in recent years, as shown in Patent Document 1, in the heat storage type combustion apparatus as described above, a heat storage material is filled in a porous pallet, and a vibrator is connected to the pallet, while the pallet is described. It has been proposed that a filter is provided under the pallet to exhaust and blow air through the filter, and a dust scattering prevention plate and a dust discharge part are provided under the pallet.

Then, in what is shown in Patent Document 1, when the combustion exhaust gas is guided to the heat storage material housed in the pallet and the heat of the combustion exhaust gas is stored in the heat storage material as described above, the dust contained in the combustion exhaust gas is generated. When it adheres to the heat storage material, the heat storage material contained in the pallet is rotated by vibrating the vibrator in a state where the heat of the combustion exhaust gas is stored in the heat storage material as described above. The dust adhering to the dust is separated from the exhaust gas by a filter, and the dust is guided from the dust scattering prevention plate to the dust discharge portion and discharged.

However, it is difficult to sufficiently peel off the dust adhering to the heat storage material only by vibrating the vibrator as described above and rotating the heat storage material housed in the pallet, and the heat storage material as described above. The work of separating the dust separated from the exhaust gas from the exhaust gas by a filter and guiding this dust from the dust scattering prevention plate to the dust discharge part and discharging it is troublesome and time-consuming, and further, the work of treating the discharged dust. There was a problem that it was also necessary.

Further, in the one shown in Patent Document 2, a stirring blade rotated by a drive device is provided in the heat storage unit containing the heat storage material, and the combustion exhaust gas is guided to the heat storage material housed in the heat storage unit as described above. When the heat of the combustion exhaust gas is stored in the heat storage material, if dust or the like adheres to the heat storage material, the above-mentioned drive device rotates the stirring blade in the heat storage unit to stir the heat storage material and bring the heat storage materials into contact with each other. The dust and the like adhering to the heat storage material are removed, and the dust and the like removed in this way are dropped from the heat storage unit to the discharge port so that the dust and the like are periodically discharged to the outside.

However, as in the case of the above-mentioned Patent Document 2, similarly to the above-mentioned Patent Document 1, only the heat storage materials are brought into contact with each other by rotating the stirring blade in the heat storage unit by the driving device to stir the heat storage materials. , It is difficult to sufficiently remove the dust etc. adhering to the heat storage material, and the dust etc. removed from the heat storage material as described above is dropped from the heat storage part to the discharge port to periodically remove the dust etc. to the outside. There is a problem that the work of discharging the heat is troublesome and time-consuming, and the work of treating the discharged dust and the like is also required.

Further, in the case shown in Patent Document 3, vibration is applied to the heat storage unit containing the heat storage material by a vibration applying device to bring the heat storage materials into contact with each other, and dust and the like adhering to the heat storage material are removed and placed in an inspection tank. It is dropped and the dust and the like dropped in the inspection tank in this way are collected.

For this reason, it is difficult to sufficiently remove dust and the like adhering to the heat storage material from the heat storage material in the case shown in Patent Document 3, as in the case of the above-mentioned Patent Documents 1 and 2, and as described above. There is a problem that the work of dropping the dust or the like removed from the heat storage material into the inspection tank and collecting it is troublesome and time-consuming, and further the work of treating the collected dust or the like is required.

Japanese Unexamined Patent Publication No. 7-158825 Japanese Unexamined Patent Publication No. 2005-257200 JP-A-2007-309957

In the present invention, the combustion air heated by the heat stored in the heat storage material stored in the heat storage unit in one burner is mixed with the fuel gas and burned in the furnace, while the fuel gas is burned in the other burner. Instead, the combustion exhaust gas after combustion in the furnace is guided to the heat storage material housed in the heat storage section so that the heat of the combustion exhaust gas is stored in the heat storage material, and the above-mentioned combustion and heat storage are alternately performed by each burner. An object of the present invention is to solve the above-mentioned problems in the case of cleaning the heat storage material housed in each heat storage unit in the heat storage type combustion device.

That is, the present invention efficiently removes deposits such as dust adhering to the heat storage material housed in each heat storage unit while operating the heat storage type combustion device as described above, and easily removes the removed dust. The challenge is to be able to process it.

In the heat storage material cleaning device of the heat storage type combustion device according to the present invention, in order to solve the above-mentioned problems, combustion air heated by the heat stored in the heat storage material housed in the heat storage unit in one burner. Is mixed with the fuel gas and burned in the furnace, while the combustion exhaust gas after combustion in the furnace is guided to the heat storage material housed in the heat storage section without burning the fuel gas in the other burner to heat the combustion exhaust gas. In the heat storage material cleaning device of the heat storage type combustion device, which cleans the heat storage material housed in each of the heat storage units, when the heat storage material is stored in the heat storage material and the combustion and the heat storage are alternately performed in each burner. When the combustion air heated by the heat stored in the heat storage material stored in the heat storage unit is mixed with the fuel gas and burned in the furnace by the burner, it is stored in the heat storage unit by the vibration device. The heat storage material was vibrated to remove deposits adhering to the heat storage material, and the deposits removed from the heat storage material were mixed with combustion air and fuel gas and burned in the furnace.

Here, when the combustion air heated by the heat stored in the heat storage material stored in the heat storage unit as described above is mixed with the fuel gas and burned in the furnace by the burner, it is stored in the heat storage unit. The heat storage material is deprived of heat by the combustion air, and the temperature is lowered to cause heat shrinkage, so that the heat storage materials are easily separated from each other, and the deposits adhering to the heat storage material are easily peeled off from the heat storage material.

Therefore, as in the present invention, when the combustion air heated by the heat stored in the heat storage material housed in the heat storage unit is mixed with the fuel gas and burned in the furnace by the burner, the vibration device is used. When the heat storage material housed in the heat storage part is vibrated, the deposits adhering to the heat storage material housed in the heat storage part can be easily peeled off from the heat storage material and removed as described above. The deposits that have been peeled off and removed from the heat storage material are vaporized or mixed with the fuel gas together with the combustion air and burned in the furnace.

Here, in the heat storage material cleaning device of the heat storage type combustion device according to the present invention, as the vibration device, the heat storage material is rotationally driven around two orthogonal axes by a gimbal mechanism under the heat storage unit in which the heat storage material is housed. A rotating body can be provided, and the rotating body can be rotated to apply an impact under the heat storage unit to vibrate the heat storage material housed in the heat storage unit.

Further, in the heat storage material cleaning device of the heat storage type combustion device according to the present invention, a piston member that moves a piston toward the heat storage portion is provided above the rotating body, and the piston moves together with the rotating body. An impact can be applied under the heat storage unit by the piston member to cause the heat storage material housed in the heat storage unit to vibrate.

In the heat storage material cleaning device of the heat storage type combustion device of the present invention, the combustion air heated by the heat stored in the heat storage material housed in the heat storage unit as described above is mixed with the fuel gas and inside the furnace by a burner. Since the heat storage material housed in the heat storage unit is vibrated by the vibrating device when burning in, the deposits adhering to the heat storage material housed in the heat storage part are easily peeled off from the heat storage material and removed. At the same time, the deposits thus peeled off and removed from the heat storage material are mixed with the fuel gas together with the combustion air and burned in the furnace.

As a result, in the heat storage material cleaning device of the heat storage type combustion device of the present invention, it is possible to efficiently remove deposits such as dust adhering to the heat storage material housed in each heat storage unit while operating the heat storage type combustion device. , The removed deposits can be easily processed and recovery is not required.

In the heat storage material cleaning device of the heat storage type combustion device according to the embodiment of the present invention, a vibration device that vibrates the heat storage material housed in the heat storage unit to remove the deposits adhering to the heat storage material is installed under each heat storage unit. It is the schematic explanatory drawing which showed the provided state. On one burner side in the above embodiment, when the combustion air heated by the heat stored in the heat storage material housed in the heat storage unit is mixed with the fuel gas and burned in the furnace, the vibration device is described. It is a schematic explanatory drawing which showed the state which vibrates the heat storage material accommodated in the heat storage part by, and removes the deposits such as dust adhering to a heat storage material. It is the schematic explanatory drawing which showed the vibration apparatus used in the said embodiment.

Hereinafter, the heat storage material cleaning device of the heat storage type combustion device according to the embodiment of the present invention will be specifically described with reference to the accompanying drawings. The heat storage material cleaning device of the heat storage type combustion device according to the present invention is not limited to the one shown in the following embodiment, and can be appropriately modified and implemented without changing the gist of the invention.

In the heat storage type combustion apparatus of this embodiment, as shown in FIG. 1, paired burners 10a and 10b are provided toward the inside of the furnace 1, respectively, and fuel for supplying fuel gas to the burners 10a and 10b, respectively. The gas supply pipes 11a and 11b are provided, and the heat storage portions 12a and 12b in which the ball-shaped heat storage material x is housed are provided. Further, a grating 19 is provided below the grating 19 so that the gas can flow while holding the heat storage material x.

Further, on the bottom side of each of the heat storage units 12a and 12b, air supply pipes 14a and 14b for supplying combustion air to the heat storage units 12a and 12b via guide pipes 13a and 13b, respectively, and in the furnace 1. Exhaust gas discharge pipes 15a and 15b for discharging the combustion exhaust gas to the outside through the heat storage units 12a and 12b are connected.

Then, the fuel gas supply pipes 11a and 11b are provided with fuel gas on-off valves 16a and 16b for switching the supply and stop of the fuel gas to the burners 10a and 10b, and the air supply pipes 14a and 14b are provided with the fuel gas on-off valves 16a and 16b. , Combustion air on-off valves 17a and 17b for switching between supply and stop of combustion air to the heat storage units 12a and 12b are provided, and are further guided through the heat storage units 12a and 12b to the exhaust gas discharge pipes 15a and 15b. Exhaust gas on-off valves 18a and 18b for switching between discharge and stop of combustion exhaust gas are provided. Regarding the opening and closing of the on-off valves 16a, 16b, 17a, 17b, 18a, and 18b, the open state of the valve is shown in white and the closed state of the valve is shown in black in the drawings.

Then, as shown in FIG. 1, on the one burner 10a side of the heat storage type combustion device of this embodiment, the fuel gas on-off valve 16a provided in the fuel gas supply pipe 11a of the burner 10a is opened to supply the fuel gas. The fuel gas is supplied through the pipe 11a, and the combustion air on-off valve 17a provided on the air supply pipe 14a is opened with the exhaust gas on-off valve 18a provided on the exhaust gas discharge pipe 15a closed to supply the combustion air to the air supply pipe. The combustion air led from the 14a to the heat storage unit 12a through the guide pipe 13a is heated by the heat stored in the heat storage material x housed in the heat storage unit 12a, and is heated in this way. The combustion operation is such that the combustion air is mixed with the fuel gas and burned in the furnace 1.

On the other hand, on the other side of the burner 10b, the fuel gas on-off valve 16b provided in the fuel gas supply pipe 11b of the burner 10b is closed to prevent the fuel gas from being supplied, and for combustion provided in the air supply pipe 14b. With the air on-off valve 17b closed, the exhaust gas on-off valve 18b provided in the exhaust gas discharge pipe 15b is opened, and the exhaust gas after combustion in the furnace 1 is guided to the heat storage material x housed in the heat storage portion 12b of the burner 10b. Therefore, the heat of the combustion exhaust gas is stored in the heat storage material x, and then the combustion exhaust gas is exhausted from the guide pipe 13b through the exhaust gas discharge pipe 15b to perform a heat storage operation.

Then, in the heat storage type combustion device of this embodiment, the combustion operation and the heat storage operation are alternately repeated in the one burner 10a and the other burner 10b.

Here, when the combustion operation and the heat storage operation are repeated many times in the burners 10a and 10b in this way, the combustion exhaust gas after combustion is guided to the heat storage material x housed in the heat storage units 12a and 12b and burned. When the heat of the exhaust gas is stored in the heat storage material x, deposits such as dust and scale contained in the combustion exhaust gas adhere to and accumulate on the heat storage material x in each of the heat storage units 12a and 12b.

Therefore, in the heat storage type combustion device of this embodiment, vibration devices 20a and 20b are provided under the heat storage units 12a and 12b, and for example, as shown in FIGS. 1 and 2, one burner 10a side. In the above-mentioned combustion operation, the vibrating device 20a provided under the heat storage unit 12a on the one side of the burner 10a is driven to vibrate the heat storage material x housed in the heat storage unit 12a. , The deposits adhering to the heat storage material x are removed from the heat storage material x, and the deposits removed from the heat storage material x are sent to the upper part together with the combustion air heated as described above in the heat storage unit 12a. It is mixed with the fuel gas supplied from the fuel gas supply pipe 11a and burned together with the fuel gas in the furnace 1.

Here, on the burner 10a side performing the combustion operation as described above, the combustion air is heated by the heat stored in the heat storage material x stored in the heat storage unit 12a, so that the combustion air is stored in the heat storage unit 12a. The heat storage material x is deprived of heat by the combustion air, the temperature is lowered, and the heat shrinks, so that the heat storage materials x that are in close contact with each other are easily separated from each other, and the deposits adhering to the heat storage material x are the heat storage material x. In this state, when the vibrating device 20a is driven to vibrate the heat storage material x housed in the heat storage unit 12a, the deposits adhering to the heat storage material x can be easily removed from the heat storage material x. It will be peeled off from and removed.

Further, the deposits removed from the heat storage material x as described above are sent together with the combustion air heated in the heat storage unit 12a as described above, and mixed with the fuel gas supplied from the fuel gas supply pipe 11a. Then, when the combustion is performed together with the fuel gas in the furnace 1, it is not necessary to separately collect the deposits removed from the heat storage material x, and the burners 10a and 10b in the heat storage type combustion device perform the above-mentioned combustion operation. It becomes possible to easily remove the deposits adhering to the heat storage material x while alternately repeating the heat storage and exhaust operation.

Here, as the vibrating devices 20a and 20b provided under the heat storage portions 12a and 12b, in this embodiment, for example, as shown in FIG. 3, as a gimbal mechanism, on the rotating member 21 rotating in the horizontal direction. A rotating member 22 that rotates in a direction perpendicular to the vertical direction is provided at an eccentric position, a rotating body 23 is provided on the rotating member 22, and a heat storage portion 12a (12b) is provided on the upper portion of the rotating body 23. A piston member 24 that moves toward the piston is provided.

Then, as shown in FIGS. 1 and 2, the rotating member 21 and the rotating member 22 rotate the rotating body 23 around two orthogonal axes, and are provided on the upper portion of the rotating body 23. The piston member 24 is vigorously moved up and down toward the heat storage portion 12a (12b), and the rotating body 23 and the piston member 24 hit the grating 19 under the heat storage portion 12a (12b) from below. I try to apply an impact from any direction. Although the mechanism for rotating the rotating member 21 and the rotating member 22 and moving the piston member 24 up and down is not shown here, these mechanisms are not particularly limited.

In this way, the heat storage material x in the heat storage unit 12a (12b) can be shocked from various directions to vibrate, and the heat storage materials x that are in close contact with each other can be separated from each other to form the heat storage material x. It becomes easier and more sufficient to remove the adhering deposits from the heat storage material x.

Here, the vibrating devices 20a and 20b provided under the heat storage units 12a and 12b are not limited to those shown in the above-described embodiment, and the heat storage material x housed in the heat storage units 12a and 12b can be vibrated. Any device can be used as long as it can be used, and for example, a device for vibrating the heat storage material as shown in Patent Documents 1 to 3 can be used.

1: Furnace 10a, 10b: Burner 11a, 11b: Fuel gas supply pipe 12a, 12b: Heat storage unit 13a, 13b: Guide pipe 14a, 14b: Air supply pipe 15a, 15b: Exhaust gas discharge pipe 16a, 16b: Fuel gas on-off valve 17a, 17b: Combustion air on-off valve 18a, 18b: Exhaust gas on-off valve 19: Grating 20a, 20b: Vibration device 21: Rotating member 22: Rotating member 23: Rotating body 24: Piston member x: Heat storage material

Claims (3)

In one burner, the combustion air heated by the heat stored in the heat storage material stored in the heat storage section is mixed with the fuel gas and burned in the furnace, while the other burner does not burn the fuel gas. When the combustion exhaust gas after combustion in the furnace is guided to the heat storage material housed in the heat storage unit to store the heat of the combustion exhaust gas in the heat storage material, and the above-mentioned combustion and heat storage are alternately performed in each burner, the above-mentioned In the heat storage material cleaning device of the heat storage type combustion device that cleans the heat storage material stored in each heat storage unit, the combustion air heated by the heat stored in the heat storage material housed in the heat storage unit is mixed with the fuel gas. When the burner is used to burn the heat in the furnace, the heat storage material contained in the heat storage unit is vibrated by a vibrating device to remove the deposits adhering to the heat storage material, and the deposits removed from the heat storage material are removed. A heat storage material cleaning device for a heat storage type combustion device, which is characterized in that a fuel gas is mixed with combustion air and burned in a furnace. In the heat storage material cleaning device of the heat storage type combustion device according to claim 1, as the vibration device, a rotating body that is rotationally driven around two axes orthogonal to each other by a gimbal mechanism under a heat storage unit in which the heat storage material is housed. A heat storage material cleaning device for a heat storage type combustion apparatus, which comprises rotating the rotating body to apply an impact under the heat storage unit to vibrate the heat storage material housed in the heat storage unit. In the heat storage material cleaning device of the heat storage type combustion device according to claim 2, a piston member that moves a piston toward the heat storage unit is provided above the rotating body, and the piston moves in combination with the rotating body. A heat storage material cleaning device for a heat storage type combustion device, characterized in that an impact is applied under the heat storage unit by a member to vibrate the heat storage material housed in the heat storage unit.

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