JP7175579B2 - Thermal storage material cleaning device for regenerative combustion equipment - Google Patents

Description

In the present invention, combustion air heated by heat stored in a heat storage material accommodated in a heat storage unit in one burner is mixed with fuel gas and burned in a furnace, while 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 contained in the heat storage unit, and the heat of the combustion exhaust gas is stored in the heat storage material, so that the combustion and heat storage are alternately performed in each burner. The present invention relates to a heat storage material cleaning device for a heat storage type combustion apparatus that cleans the heat storage material accommodated in each heat storage unit in the heat storage type combustion apparatus. In particular, while operating the regenerative combustion apparatus, it is possible to efficiently remove deposits such as dust adhering to the heat storage material accommodated in each heat storage unit, and to easily dispose of the removed deposits. It is characterized by points.

Conventionally, in an industrial furnace, etc., combustion air heated by heat stored in a heat storage material accommodated in a heat storage unit in one burner is mixed with fuel gas and burned in the furnace, while the other burner Without burning the fuel gas in the furnace, the flue gas after combustion in the furnace is guided to the heat storage material contained in the heat storage unit to store the heat of the flue gas in the heat storage material, and the combustion and heat storage are performed in each burner. A regenerative combustion apparatus is used in which the heat of the combustion exhaust gas is effectively used by alternately performing the operation.

Here, in the regenerative combustion apparatus, when the flue gas after combustion is guided to the heat storage material contained in the heat storage unit as described above and the heat of the flue gas is stored in the heat storage material, dust contained in the flue gas , scales, etc., adhere to and accumulate on the heat storage material, and the air permeability of the heat storage section decreases due to such adherents adhering to the heat storage material. In addition, the speed at which the flue gas passes through the heat storage unit containing the heat storage material becomes slower, and the dust and scale contained in the flue gas are more likely to adhere to the heat storage material. had to be replaced at an early stage.

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

In the device disclosed in Patent Document 1, when the combustion exhaust gas is guided to the heat storage material accommodated in the pallet as described above and the heat of the combustion exhaust gas is stored in the heat storage material, the dust contained in the combustion exhaust gas is removed. If it adheres to the heat storage material, in the state where the heat of the combustion exhaust gas is stored in the heat storage material as described above, the vibrator is vibrated to rotate the heat storage material accommodated in the pallet, and the heat storage material The dust adhering to the exhaust gas is separated from the exhaust gas by a filter, and guided from the dust scattering prevention plate to the dust discharge portion for discharge.

However, it is difficult to sufficiently remove the dust adhering to the heat storage material only by vibrating the vibrator and rotating the heat storage material accommodated in the pallet as described above. The work of separating the dust separated from the exhaust gas from the exhaust gas by a filter, leading this dust from the dust scattering prevention plate to the dust discharge part and discharging it is troublesome and time consuming, and furthermore, the work of processing the discharged dust There was also the problem of needing

In addition, in the device disclosed in Patent Document 2, a stirring blade rotated by a driving device is provided in a heat storage section in which a heat storage material is accommodated, and the combustion exhaust gas is guided to the heat storage material accommodated in the heat storage section 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 driving 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 by the heat storage section, and the dust and the like thus removed are dropped from the heat storage portion to the discharge port, and the dust and the like are periodically discharged to the outside.

However, in the technique disclosed in Patent Document 2, as in the technique described in Patent Document 1, the driving device only rotates the stirring blade in the heat storage section to stir the heat storage material and bring the heat storage materials into contact with each other. However, it is difficult to sufficiently remove the dust and the like adhering to the heat storage material. There is a problem in that the work of discharging the dust into the air is troublesome and takes a long time, and that the work of disposing of the discharged dust and the like is also required.

In addition, the one shown in Patent Document 3 applies vibration to a heat storage unit in which a heat storage material is accommodated by a vibration imparting device to bring the heat storage materials into contact with each other, removes dust etc. attached to the heat storage material, and places it in an inspection tank. The dust and the like dropped into the inspection tank are recovered.

For this reason, it is difficult for the method disclosed in Patent Document 3 to sufficiently remove the dust and the like adhering to the heat storage material from the heat storage material, as with the methods described in Patent Documents 1 and 2. The work of dropping the dust and the like removed from the heat storage material into the inspection tank for collection is troublesome and time-consuming, and furthermore, there is the problem that the work of processing the collected dust and the like is also required.

JP-A-7-158825 JP-A-2005-257200 JP 2007-309597 A

In the present invention, combustion air heated by heat stored in a heat storage material accommodated in a heat storage unit in one burner is mixed with fuel gas and burned in a furnace, while 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 contained in the heat storage unit, and the heat of the combustion exhaust gas is stored in the heat storage material, so that the combustion and heat storage are alternately performed in each burner. It is an object of the present invention to solve the above-described problems in the case of cleaning the heat storage material accommodated in each heat storage unit in a heat storage type combustion apparatus.

That is, the present invention efficiently removes deposits such as dust adhering to the heat storage material accommodated in each heat storage unit while operating the regenerative combustion apparatus as described above, and easily removes the removed dust. The task is to make it possible to process.

In the heat storage material cleaning device of the regenerative combustion apparatus according to the present invention, in order to solve the above problems, combustion air heated by the heat stored in the heat storage material accommodated in the heat storage part 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 contained in the heat storage unit without burning the fuel gas in the other burner, and the heat of the combustion exhaust gas is is stored in the heat storage material, and when the combustion and heat storage are alternately performed in each burner, the heat storage material cleaning device of the heat storage type combustion apparatus for cleaning the heat storage material accommodated in each heat storage unit, A ball-shaped heat storage material is used as the heat storage material, and the combustion air heated by the heat stored in the heat storage material accommodated in the heat storage unit is mixed with the fuel gas and burned in the furnace by the burner. At this time, the heat storage material accommodated in the heat storage unit is vibrated by a vibrating device to remove deposits adhering to the heat storage material, and the deposits removed from the heat storage material are mixed with the fuel gas together with the combustion air. As the vibrating device, a rotating body that is driven to rotate about two orthogonal axes by a gimbal mechanism is provided under the heat storage unit in which the heat storage material is accommodated. It is rotated to apply an impact to the bottom of the heat storage section, thereby vibrating the heat storage material accommodated in the heat storage section .

Here, when the combustion air heated by the heat stored in the ball-shaped heat storage material accommodated in the heat storage unit as described above is mixed with the fuel gas and burned in the furnace by the burner, the heat storage unit The ball-shaped heat storage material housed in the above-mentioned combustion air loses heat, the temperature decreases, the heat shrinks, and the heat storage material becomes easier to separate from each other, and the deposits attached to the heat storage material Easy to peel off from.

For this reason, as in the present invention, when the combustion air heated by the heat stored in the ball-shaped heat storage material accommodated in the heat storage unit is mixed with the fuel gas and burned in the furnace by the burner, vibration occurs. When the ball-shaped heat storage material accommodated in the heat storage unit is vibrated by the device, the deposits adhering to the ball-shaped heat storage material accommodated in the heat storage unit are easily peeled off and removed from the heat storage material as described above. As such, the deposits peeled off and removed from the heat storage material are vaporized or mixed with fuel gas together with combustion air to be burned in the furnace.

Here, in the heat storage material cleaning device of the regenerative combustion apparatus according to the present invention, the vibrating device, which rotates around two orthogonal axes by a gimbal mechanism, is placed below the heat storage unit in which the ball-shaped heat storage material is accommodated. A rotating body to be driven is provided, and the rotating body is rotated to apply an impact to the bottom of the heat storage section, thereby vibrating the heat storage material accommodated in the heat storage section .

Further, in the heat storage material cleaning device for a heat storage type combustion apparatus according to the present invention, a piston member that performs a piston movement toward the heat storage section is provided above the rotating body, and the piston moves together with the rotating body. It is possible to vibrate the ball-shaped heat storage material accommodated in the heat storage section by applying an impact to the bottom of the heat storage section by the piston member.

In the heat storage material cleaning device of the regenerative combustion apparatus according to the present invention, the combustion air heated by the heat stored in the ball-shaped heat storage material accommodated in the heat storage unit as described above is mixed with the fuel gas to produce a burner. When burning in the furnace, the heat storage material accommodated in the heat storage unit from below the heat storage unit where the heat storage material is accommodated by a vibration device provided with a rotating body that is rotationally driven around two orthogonal axes by a gimbal mechanism is vibrated, the deposits adhering to the heat storage material accommodated in the heat storage part can be easily peeled off from the ball-shaped heat storage material and removed. The deposits are mixed with the fuel gas together with the combustion air and combusted in the furnace.

As a result, in the heat storage material cleaning device of the regenerative combustion apparatus according to the present invention, while operating the regenerative combustion apparatus, deposits such as dust adhering to the ball-shaped heat storage material accommodated in each heat storage unit can be efficiently removed. In addition to being able to be removed, the removed adherents can be easily treated, and recovery becomes unnecessary.

In the heat storage material cleaning device of the regenerative combustion apparatus according to the embodiment of the present invention, a vibrating device for vibrating the heat storage material accommodated in the heat storage unit to remove deposits adhering to the heat storage material is provided 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 contained in the heat storage unit is mixed with the fuel gas and burned in the furnace, the vibration device FIG. 10 is a schematic explanatory view showing a state in which the heat storage material housed in the heat storage unit is vibrated by to remove deposits such as dust adhering to the heat storage material. It is the schematic explanatory drawing which showed the vibration apparatus used in the said embodiment.

Hereinafter, a heat storage material cleaning device for a heat storage type combustion apparatus according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. Note that the heat storage material cleaning device for a regenerative combustion device according to the present invention is not limited to the following embodiments, and can be modified as appropriate without changing the gist of the invention.

In the regenerative combustion apparatus of this embodiment, as shown in FIG. 1, a pair of burners 10a and 10b are provided facing the inside of the furnace 1, and fuel gas is supplied to each burner 10a and 10b. Gas supply pipes 11a and 11b are provided, and heat storage portions 12a and 12b containing ball-shaped heat storage materials x are provided. Moreover, a grating 19 is provided in the lower part thereof, and allows the gas to flow while holding the heat storage material x.

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

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

Then, as shown in FIG. 1, on one burner 10a side of the regenerative combustion apparatus in 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. While the fuel gas is supplied through the pipe 11a, the exhaust gas on-off valve 18a provided on the exhaust gas discharge pipe 15a is closed, the combustion air on-off valve 17a provided on the air supply pipe 14a is opened, and the combustion air is supplied to the air supply pipe. 14a is led to the heat storage section 12a through the guide pipe 13a, and the combustion air thus guided to the heat storage section 12a is heated by the heat stored in the heat storage material x accommodated in the heat storage section 12a. Combustion air is mixed with the fuel gas and combusted in the furnace 1 for combustion operation.

On the other hand, on the other burner 10b side, the fuel gas opening/closing valve 16b provided in the fuel gas supply pipe 11b of this burner 10b is closed so as not to supply the fuel gas, and the combustion valve provided in the air supply pipe 14b is closed. 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 to guide the combustion exhaust gas after combustion in the furnace 1 to the heat storage material x housed in the heat storage portion 12b of the burner 10b. Then, 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.

In the regenerative combustion apparatus of this embodiment, the one burner 10a and the other burner 10b alternately repeat the combustion operation and the heat storage operation.

Here, if the combustion operation and the heat storage operation are repeatedly performed in each burner 10a, 10b in this way, the combustion exhaust gas after combustion is led to the heat storage material x accommodated in each heat storage unit 12a, 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 the heat storage portions 12a and 12b.

For this reason, in the regenerative combustion apparatus of this embodiment, vibration devices 20a and 20b are provided under the respective regenerative portions 12a and 12b, and, for example, as shown in FIGS. When performing the combustion operation as described above, the vibration device 20a provided under the heat storage section 12a on the one burner 10a side is driven to vibrate the heat storage material x accommodated in the heat storage section 12a. removes the deposits adhering to the heat storage material x from the heat storage material x, and sends the deposits removed from the heat storage material x upward together with the combustion air heated as described above in the heat storage section 12a. are mixed with the fuel gas supplied from the fuel gas supply pipe 11a, and combusted in the furnace 1 together with the fuel gas.

Here, on the side of the burner 10a performing the combustion operation as described above, the heat stored in the heat storage material x stored in the heat storage section 12a is used to heat the combustion air. The heat storage material x is deprived of heat by the combustion air, the temperature decreases, and the heat storage material x is thermally shrunk. In this state, when the vibration device 20a is driven as described above to vibrate the heat storage material x housed in the heat storage unit 12a, the deposits attached to the heat storage material x are easily removed from the heat storage material x. It will peel off and be removed from the

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 section 12a as described above, and mixed with the fuel gas supplied from the fuel gas supply pipe 11a. and combusted together with the fuel gas in the furnace 1, there is no need to separately collect the deposits removed from the heat storage material x, and the burners 10a and 10b in the regenerative combustion apparatus perform the above-described combustion operation and It is possible to easily remove deposits adhering to the heat storage material x while alternately performing the heat storage exhaust operation.

Here, in this embodiment, as the vibration devices 20a and 20b provided below the heat storage units 12a and 12b, for example, as shown in FIG. A rotating member 22 that rotates in the vertical direction is provided at an eccentric position, and a rotating body 23 is provided on the rotating member 22, and a heat storage part 12a (12b) is provided above the rotating body 23. A piston member 24 is provided for pistoning toward.

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

In this way, the heat storage material x in the heat storage part 12a (12b) can be vibrated by applying impacts from various directions, and the heat storage material x that has been in close contact with each other can be separated and the heat storage material x It is possible to more easily and sufficiently remove adhering substances 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 embodiment, and can vibrate the heat storage material x housed in the heat storage units 12a and 12b. Any device can be used as long as it can. For example, a device for vibrating the heat storage material as shown in the above-mentioned Patent Documents 1 to 3 can also be used.

1: Furnaces 10a, 10b: Burners 11a, 11b: Fuel gas supply pipes 12a, 12b: Heat storage units 13a, 13b: Guide pipes 14a, 14b: Air supply pipes 15a, 15b: Exhaust gas discharge pipes 16a, 16b: Fuel gas on-off valve 17a, 17b: combustion air on-off valves 18a, 18b: exhaust gas on-off valve 19: gratings 20a, 20b: vibration device 21: rotating member 22: rotating member 23: rotating body 24: piston member x: heat storage material

Claims (2)

In one burner, the combustion air heated by the heat stored in the heat storage material contained in the heat storage unit is mixed with the fuel gas and burned in the furnace, while the other burner does not burn the fuel gas, The combustion exhaust gas after combustion in the furnace is guided to the heat storage material contained in the heat storage unit so that the heat of the combustion exhaust gas is stored in the heat storage material, and the combustion and heat storage are performed alternately in each burner. In a heat storage material cleaning device of a regenerative combustion device for cleaning the heat storage material accommodated in each heat storage unit, a ball-shaped heat storage material is used as the heat storage material, and heat is stored in the heat storage material accommodated in the heat storage unit. When the heat-heated combustion air is mixed with the fuel gas and burned in the furnace by the burner, the heat storage material contained in the heat storage unit is vibrated by the vibrating device to cause the heat storage material to adhere to the heat storage material. When the deposits are removed, and the deposits removed from the heat storage material are mixed with the combustion air and the fuel gas and burned in the furnace , the vibrating device is placed under the heat storage unit in which the heat storage material is accommodated. a rotating body that is rotated about two orthogonal axes by a gimbal mechanism is provided, and the rotating body is rotated to apply an impact to the bottom of the heat storage section, thereby vibrating the heat storage material accommodated in the heat storage section; A heat storage material cleaning device for a heat storage type combustion device, characterized by: 2. A heat storage material cleaning device for a regenerative combustion apparatus according to claim 1 , wherein a piston member that performs piston movement toward the heat storage unit is provided above the rotating body, and the piston performs piston movement together with the rotating body. 1. A heat storage material cleaning device for a heat storage type combustion device, wherein a member applies an impact to the bottom of a heat storage unit to vibrate the heat storage material accommodated in the heat storage unit.

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