JP7663535B2 - Air supply processing device and air supply processing method - Google Patents

Description

The present invention relates to an air supply treatment device and an air supply treatment method, and in particular to an air supply treatment device and an air supply treatment method suitable for an air supply treatment device equipped with multiple filters that filter the outside air introduced into a room to make it clean air.

For example, facilities such as nuclear power plants are equipped with emergency power generation equipment to supply electricity in the event of a power outage.

Such emergency power generation equipment often uses internal combustion engines such as diesel engines, but this emergency power generation equipment is required to start reliably and to be able to generate electricity stably in the event of a power loss.

For example, Patent Document 1 describes a technique for replacing filters in diesel engines for nuclear power plants without stopping their operation.

That is, in order to make it possible to easily replace the filter without stopping the operation of the diesel engine for a nuclear power plant, Patent Document 1 describes a filter device that includes a filter body that captures volcanic ash contained in the intake air of the diesel engine, a first rail that supports the filter body so that it can slide in a cross direction that crosses the flow direction of the intake air, a second rail that is arranged on the upstream or downstream side of the first rail in the flow direction of the intake air and supports a closure plate through which the intake air cannot pass so that it can slide in the cross direction, and a frame that supports the first rail so that a plurality of the filter bodies are arranged side by side in the cross direction and supports the second rail so that a plurality of the closure plates are arranged side by side in the cross direction.

JP 2019-37933 A

The above-mentioned Patent Document 1 proposes that filter replacement can be performed using rails, without stopping the operation of the diesel engine, but in recent years, in response to new regulations, volcanic ash has also been taken into consideration in air conditioning, and a volcanic ash filter has been installed to remove volcanic ash from volcanic eruptions, and if the volcanic ash filter becomes clogged, it is planned to replace it manually.

However, because the volcanic ash concentration during a volcanic eruption is estimated to be extremely high, the technology described in Patent Document 1 had the problem of requiring the volcanic ash filter to be replaced very frequently.

The present invention has been made in consideration of the above points, and its purpose is to provide an air supply treatment device and an air supply treatment method that can turn the introduced outside air into clean air.

In order to achieve the above object, the air supply treatment device of the present invention comprises a casing, first and second filters housed in the casing, a third filter having a coarser mesh than the first and second filters housed in the casing, a first room in which a first opening is formed and in which a first fan is installed, a second room in which a second opening is formed and in which a second fan is installed, a third opening formed at the boundary between the first room and the second room and communicating the first room with the second room, and first, second and third partition plates that close at least the first, second and third openings, respectively. During normal operation when the first fan or the second fan is activated, the third opening is closed by the third partition plate, and in this state the first opening or the second opening is opened to introduce outside air into the first room or the second room, and the introduced outside air is filtered by the third filter to form clean air.

In order to achieve the above object, the air supply treatment method of the air supply treatment device of the present invention includes a casing that includes a first and second filter and a third filter that is coarser than the first and second filters, a first opening is formed in the first room in which the first fan is installed, a second opening is formed in the second room in which the second fan is installed, and a third opening that communicates the first and second rooms is formed at the boundary between the first and second rooms, and the device has first, second, and third partition plates that close at least the first, second, and third openings, respectively, and during normal operation when the first fan or the second fan is activated, the third opening is closed using the third partition plate, and the first opening or the second opening is opened to introduce outside air into the first room or the second room, and the introduced outside air is filtered by the third filter to produce clean air.

In order to achieve the above object, the air supply treatment device of the present invention comprises a casing, first and second filters housed in the casing, a third filter having a coarser mesh than the first and second filters housed in the casing, a first chamber in which a first opening is formed and in which a first fan is installed, a second chamber in which a second opening is formed and in which a second fan is installed, a third opening formed at the boundary between the first chamber and the second chamber and communicating the first chamber with the second chamber, and first, second and third partition plates for closing at least the first, second and third openings, respectively. During operation when the first fan is started in a state in which volcanic ash has fallen, the first filter is placed in the first opening, and the air containing the volcanic ash passes through the first filter to remove the volcanic ash, and the air from which the volcanic ash has been removed by the first filter is sent to the third filter and filtered by the third filter to form clean air.

Furthermore, in order to achieve the above object, the air supply treatment method of the air supply treatment device of the present invention includes a casing that includes a first and second filter and a third filter having a coarser mesh than the first and second filters, a first opening is formed in the first room in which the first fan is installed, a second opening is formed in the second room in which the second fan is installed, and a third opening is formed at the boundary between the first room and the second room, and the device has first, second, and third partition plates that close at least the first, second, and third openings, respectively, and is characterized in that, during operation when the first fan is started in a state where volcanic ash has fallen, the first filter is placed in the first opening, and the air containing the volcanic ash is passed through the first filter to remove the volcanic ash, and the air from which the volcanic ash has been removed by the first filter is sent to the third filter, and filtered by the third filter to obtain clean air.

According to the present invention, it is possible to make the introduced outside air into clean air.

1 is a plan view showing a state in which a first fan is activated during normal operation in the supply air treatment device according to the first embodiment of the present invention; FIG. 1 is a plan view showing a state in which the second fan is activated during normal operation in the supply air treatment device according to the first embodiment of the present invention. FIG. FIG. 1 is a plan view showing a state in which the first fan is started immediately after volcanic ash fall occurs in the supply air treatment device according to the first embodiment of the present invention. FIG. 2 is a plan view showing a backwash operation of the first volcanic ash filter in the supply air treatment device according to the first embodiment of the present invention. FIG. 2 is a plan view showing a backwash operation of the second volcanic ash filter in the air treatment device according to the first embodiment of the present invention. 5 is a cross-sectional view taken along line AA in FIG. 4.

The air supply processing device and air supply processing method of the present invention will be described below based on the illustrated embodiment. Note that the same reference numerals are used for the same components in each figure.

Figures 1 and 2 show a first embodiment of the air supply treatment device 20 of the present invention. Figure 1 shows the state in which the first fan 1 is activated during normal operation of the air supply treatment device 20, and Figure 2 shows the state in which the second fan 2 is activated during normal operation of the air supply treatment device 20.

As shown in Figures 1 and 2, the air intake treatment device 20 of this embodiment comprises a casing 12 which is an outer frame, a first volcanic ash filter 3 which is a first filter housed in the casing 12, a second volcanic ash filter 4 which is a second filter housed in the casing 12, a medium-performance filter 8 which is a third filter having a coarser mesh than the first volcanic ash filter 3 and the second volcanic ash filter 4 housed in the casing 12, a first opening 9 formed in a part of the casing 12, The fan is generally composed of a first chamber 15 to which the first fan 1 is connected, a second chamber 16 to which the second fan 2 is connected and a third opening 11 formed at the boundary between the first chamber 15 and the second chamber 16 and communicating the first chamber 15 and the second chamber 16, and a first partition plate 5, a second partition plate 6, and a third partition plate 7 that close the first opening 9, the second opening 10, and the third opening 11, respectively. The first fan 1 is attached to the casing 12 via a duct 13a, and the second fan 2 is attached to the casing 12 via a duct 13b.

As shown in FIG. 1, during normal operation when the first fan 1 is activated, the third opening 11 is closed by the third partition plate 7, and in this state the first opening 9 is opened to introduce outside air as indicated by the arrow into the first room 15. This introduced outside air is filtered by the medium-performance filter 8 to form clean air, which is then introduced into the building.

As shown in FIG. 2, during normal operation when the second fan 2 is activated, the third opening 11 is closed by the third partition plate 7, and in this state the second opening 10 is opened to introduce outside air as indicated by the arrow into the second room 16. This introduced outside air is filtered by the medium-performance filter 8 to form clean air, which is then introduced into the building.

During normal operation when the first fan 1 and second fan 2 are activated, the first volcanic ash filter 3, the first volcanic ash filter 4, the first partition plate 5, and the second partition plate 6 are not in use.

Next, the operation of the air supply treatment device 20 when the first fan 1 and the second fan 2 start up in a state where volcanic ash has fallen will be explained using Figures 3, 4, and 5. Note that the configuration of the air supply treatment device 20 in Figures 3, 4, and 5 is the same as the configuration of the air supply treatment device 20 shown in Figures 1 and 2.

Figure 3 shows the case where the first fan 1 is started immediately after volcanic ash falls in the air supply treatment device 20 of this embodiment, Figure 4 shows the case where the first volcanic ash filter 3 is backwashed in the air supply treatment device 20 of this embodiment, and Figure 5 shows the case where the second volcanic ash filter 4 is backwashed in the air supply treatment device 20 of this embodiment.

The details are explained below.

As shown in Figure 3, when the first fan 1 is started in a state where volcanic ash has fallen, the first volcanic ash filter 3 is installed in the first opening 9, and the air containing volcanic ash is passed through the first volcanic ash filter 3 to remove the volcanic ash. The air from which the volcanic ash has been removed by the first volcanic ash filter 3 is then sent to the medium-performance filter 8, where it is filtered to become clean air and introduced into the building.

That is, when a worker manually places the first volcanic ash filter 3 in the first opening 9, air flows as shown by the arrows, and the air from which volcanic ash has been removed is sent to the medium-performance filter 8 by the front surface (air intake side) of the first volcanic ash filter 3, and the clean air filtered by the medium-performance filter 8 is then introduced into the building.

Next, when performing the backwash operation of the first volcanic ash filter 3, as shown in FIG. 4, the first volcanic ash filter 3 through which the volcanic ash has passed is placed in the third opening 11 with the side of the first volcanic ash filter 3 with the volcanic ash adhering thereto facing the first chamber 15, the first partition plate 5 is placed in the first opening 9 to close the first opening 9, and the second volcanic ash filter 4 is placed in the second opening 10. In this state, the first fan 1 is operated to introduce outside air from the second opening 10 through the second volcanic ash filter 4 into the second chamber 16, and the air introduced into the second chamber 16 is introduced from the third opening 11 through the first volcanic ash filter 3 into the first chamber 15, thereby removing the volcanic ash adhering to the first volcanic ash filter 3, thereby backwashing the first volcanic ash filter 3.

That is, the first volcanic ash filter 3 used in Fig. 3 is manually installed in the third opening 11 by a worker with its front surface (the air intake side in Fig. 3, which is the left side of the first volcanic ash filter 3 in Fig. 4 = the first chamber 15 side) facing the first fan 1. In addition, the first partition plate 5 is installed in the first opening 9, and the second volcanic ash filter 4 is installed in the second opening 10.

When the first fan 1 is operated in this state, the air flow indicated by the arrows removes volcanic ash from the front surface of the second volcanic ash filter 4 (the air intake side = second chamber 16 side), and the air that has passed through the second volcanic ash filter 4 performs a backwash to remove volcanic ash adhering to the front surface of the first volcanic ash filter 3 installed in the third opening 11.

By backwashing the first volcanic ash filter 3 shown in Figure 4, the volcanic ash removed from the first volcanic ash filter 3 falls onto the floor surface in the first room 15 of the air supply treatment device 20 if the particle size is large, and small particle size is removed by the medium-performance filter 8, and clean air from which the volcanic ash has been filtered is introduced into the building.

As shown in FIG. 6, which is a cross section taken along line A-A in FIG. 4, the bottoms of the first chamber 15 and the second chamber 16 are sloped so that they become lower toward the ends, allowing the volcanic ash 14 to accumulate at the ends of the air supply treatment device 20, making it easier to clean the air supply treatment device 20.

When performing the backwash operation of the second volcanic ash filter 4, as shown in FIG. 5, the second volcanic ash filter 4 is placed in the third opening 11 with the side on which the volcanic ash is attached facing the second chamber 16, the second partition plate 6 is placed in the second opening 10 to close the second opening 10, the first partition plate 5 is removed from the first opening 9, and the first volcanic ash filter 3 is placed in the first opening 9. In this state, the second fan 2 is operated to introduce outside air from the first opening 9 through the first volcanic ash filter 3 into the first chamber 15, and the air introduced into the first chamber 15 is introduced from the third opening 11 through the second volcanic ash filter 4 into the second chamber 16, thereby removing the volcanic ash attached to the second volcanic ash filter 4 and backwashing the second volcanic ash filter 4.

That is, the second volcanic ash filter 4 used in Figure 4 is installed in the third opening 11 with its front surface (the air intake side in Figure 4, the right side of the second volcanic ash filter 4 in Figure 5 = the second room 16 side) facing the second fan 2 side. In addition, a second partition plate 6 is installed in the second opening 10. The first partition plate 5 is removed from the first opening 9, and instead the first volcanic ash filter 3 that was previously decontaminated is installed with its front surface facing the outside of the air supply treatment device 20. At this time, the accumulated volcanic ash 14 shown in Figure 6 is cleaned off.

When the second fan 2 is operated in this state, the air flow indicated by the arrows removes volcanic ash from the front surface of the first volcanic ash filter 3 (the air intake side = first chamber 15 side), and the air that has passed through the first volcanic ash filter 3 removes volcanic ash adhering to the front surface of the second volcanic ash filter 4 installed at the third opening 11, thereby backwashing the second volcanic ash filter 4.

By backwashing the second volcanic ash filter 4 shown in Figure 5, the volcanic ash removed from the second volcanic ash filter 4 falls onto the floor surface in the second room 16 of the air intake treatment device 20 if the particle size is large. As in Figure 6, the volcanic ash 14 accumulates at the end of the air intake treatment device 20, making it easier to clean the air intake treatment device 20. Smaller particle size particles are removed by the medium-performance filter 8, and clean air with the volcanic ash filtered out is introduced into the building.

According to this embodiment, it is possible to make the introduced outside air clean without replacing the filter with a new one, and even if the filter is equipped with a filter that removes volcanic ash, it is possible to remove volcanic ash without replacing it with a new filter. In addition, the life of the filter can be extended even when high concentrations of volcanic ash fall.

The present invention is not limited to the above-described embodiments, but includes various modifications. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and are not necessarily limited to those having all of the configurations described. It is also possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to add, delete, or replace part of the configuration of each embodiment with other configurations.

1...first fan, 2...second fan, 3...first volcanic ash filter, 4...second volcanic ash filter, 5...first partition plate, 6...second partition plate, 7...third partition plate, 8...medium performance filter, 9...first opening, 10...second opening, 11...third opening, 12...casing, 13a, 13b...duct, 14...volcanic ash, 15...first room, 16...second room, 20...air supply treatment device.

Claims (10)

a casing constituting the air supply processing device contains first and second filters and a third filter having a coarser mesh than the first and second filters, a first opening is formed in a first chamber in which a first fan is installed, a second opening is formed in a second chamber in which a second fan is installed, and a third opening is formed at a boundary between the first chamber and the second chamber, communicating the two chambers, and the device has first, second and third partition plates for closing at least the first, second and third openings, respectively;
During normal operation when the first fan or the second fan is started, the third opening is closed using the third partition plate, and the first opening or the second opening is opened to introduce outside air into the first room or the second room, and the introduced outside air is filtered by the third filter to convert it into clean air. a casing constituting the air supply treatment device contains first and second filters and a third filter having a coarser mesh than the first and second filters, a first opening is formed in a first chamber in which a first fan is installed, a second opening is formed in a second chamber in which a second fan is installed, and a third opening is formed at a boundary between the first chamber and the second chamber to communicate with each other, and the device has first, second and third partition plates for closing at least the first, second and third openings, respectively;
This is an air supply treatment method for an air supply treatment device, characterized in that when the first fan is started up when volcanic ash has fallen, the first filter is installed at the first opening, and the air containing the volcanic ash is passed through the first filter to remove the volcanic ash, and the air from which the volcanic ash has been removed by the first filter is sent to the third filter, and filtered by the third filter to produce clean air. 3. An air supply processing method for the air supply processing device according to claim 2, comprising:
An air supply treatment method for an air supply treatment device, characterized in that the first filter through which the volcanic ash has passed is installed in the third opening with the surface of the first filter to which the volcanic ash has adhered facing the first room, the first partition plate is installed in the first opening to close the first opening, and the second filter is installed in the second opening, and by operating the first fan in this state, outside air is introduced into the second room from the second opening through the second filter, and the air introduced into the second room is introduced into the first room from the third opening through the first filter, thereby removing the volcanic ash adhered to the first filter. 4. The air supply processing method of claim 3,
An air supply treatment method for an air supply treatment device, characterized in that the surface of the second filter to which the volcanic ash is attached is placed in the third opening with the surface facing the second room, the second partition plate is placed in the second opening to close the second opening, the first partition plate is removed from the first opening and the first filter is placed in the first opening, and in this state, the second fan is operated to introduce outside air from the first opening through the first filter into the first room, and the air introduced into the first room is introduced from the third opening through the second filter into the second room, thereby removing the volcanic ash attached to the second filter. a casing, first and second filters housed in the casing, a third filter having a coarser mesh than the first and second filters housed in the casing, a first chamber having a first opening and a first fan installed therein, a second chamber having a second opening and a second fan installed therein, a third opening formed at a boundary between the first chamber and the second chamber and communicating the first chamber with the second chamber, and first, second and third partition plates closing at least the first, second and third openings, respectively;
During normal operation when the first fan or the second fan is activated, the third opening is closed by the third partition plate, and in this state, the first opening or the second opening is opened to introduce outside air into the first room or the second room, and the introduced outside air is filtered by the third filter to form clean air. a casing, first and second filters housed in the casing, a third filter having a coarser mesh than the first and second filters housed in the casing, a first chamber having a first opening and a first fan installed therein, a second chamber having a second opening and a second fan installed therein, a third opening formed at a boundary between the first chamber and the second chamber and communicating the first chamber with the second chamber, and first, second and third partition plates closing at least the first, second and third openings, respectively;
This air treatment device is characterized in that, during operation when the first fan is started when volcanic ash has fallen, the first filter is installed at the first opening, and air containing the volcanic ash passes through the first filter to remove the volcanic ash, and the air from which the volcanic ash has been removed by the first filter is sent to the third filter, where it is filtered to form clean air. The air supply treatment device according to claim 6,
The first filter through which the volcanic ash has passed is installed in the third opening with the surface of the first filter to which the volcanic ash has adhered facing the first room, the first partition plate is installed in the first opening to close the first opening, and the second filter is installed in the second opening, and by operating the first fan in this state, outside air is introduced into the second room from the second opening through the second filter, and the air introduced into the second room is introduced into the first room from the third opening through the first filter, thereby removing the volcanic ash adhered to the first filter. The air supply treatment device according to claim 7,
The surface of the second filter to which the volcanic ash is attached is installed in the third opening so as to face the second room, the second partition plate is installed in the second opening to close the second opening, and the first partition plate is removed from the first opening and the first filter is installed in the first opening, and by operating the second fan in this state, outside air is introduced into the first room from the first opening through the first filter, and the air introduced into the first room is introduced into the second room from the third opening through the second filter, thereby removing the volcanic ash attached to the second filter. The air supply treatment device according to claim 7,
3. The air supply processing device according to claim 2, wherein the first and second fans are attached to the casing via ducts. The air supply treatment device according to claim 7,
4. The air supply processing device according to claim 1, wherein the bottoms of the first and second chambers are formed so as to be inclined downward toward the ends.

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