Powder dust automatic cleaning type filter device system

Abstract

To provide a volcanic ash automatic cleaning type filter device system which can capture falling volcanic ashes without fail and does not need immediate maintenance for replacement of primary and secondary side filters during an emergency even after long-term use.SOLUTION: The invention includes: suction part forming means having a structure which reduces an amount of powder dust to be suctioned; passage forming means having a structure which prevents adhesion and accumulation of the suctioned powder dust; means for measuring adhesion state of powder dust adhering to a filter in which a filter surface is arranged facing downward so as to prevent entry of powder dust which has passed through a passageway; cleaning means which cleans the filter to which powder dust adheres when a measured powder dust adhering state exceeds a determined threshold value; processing step parts provided at two or more positions; and control means which performs control in which when the powder dust adhering state exceeds the threshold value at one of the positions, operation of the processing step part in the one position is switched to operation in the other position and filter cleaning is performed at the processing step part in the one position preventing powder dust processing from being stopped.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a filter device system for volcanic ash and other dust particles that captures dust, dirt, pollen, and other suspended particulate matter in the outside air, as well as volcanic ash. In particular, the present invention relates to a BCP (Business Continuity Planning) automatic cleaning filter device system for volcanic ash and other dust particles that can perform self-cleaning operations even while the filter device system is in operation, preventing failures and shutdowns of important air conditioning heat exchange infrastructure equipment due to clogged filters and enabling the continuous operation of important equipment to prevent and suppress damage caused by filter clogging due to volcanic ash. This allows the volcanic ash filter device system to continue operating over a long period of time in the event of a natural disaster, and does not require immediate emergency measures or maintenance such as filter replacement, allowing the operation of important facility infrastructure to continue in the event of a volcanic eruption. [Background technology]

[0002] Japan is a volcanic country, with active volcanoes found all over the country. Even now, there are areas where many active volcanoes erupt frequently, and in these areas, dealing with and dealing with falling volcanic ash is a pressing issue in order to protect BCP business continuity activities for society's politics, economy, security, and other aspects. However, even in such areas of active volcanic activity, it is still necessary to take in outside air as usual for important atmospheric infrastructure, and atmospheric air filter systems must be used.When using filter systems in areas of active volcanic activity, there is a particular need for filter systems that can efficiently remove volcanic ash and prevent the filter from becoming clogged due to the capture of volcanic ash, making the filter unusable.

[0003] Volcanic ash is extremely dangerous and can seep into defense and security infrastructure, important government facility infrastructure, airports, railways, power generation substations, fire and police facilities, IT computer centers, public broadcasting facilities, digital communications facilities, factory air conditioning systems, tower buildings, office buildings, and even homes and workplaces. It can even seep into expensive and important equipment such as televisions, computers, and cameras, potentially causing irreparable damage. Furthermore, unlike ordinary household dust and dirt, volcanic ash has a sharp, crystalline, glass-like structure, which means that when it is wiped or brushed off, it can scratch and abrade the surfaces of important equipment, furniture, and electrical appliances.

[0004] Also, when it rains, the accumulated volcanic ash becomes wet and less likely to move, which can make the air clearer. However, when the air dries, the volcanic ash can easily be stirred up by wind or passing cars, and is likely to move and scatter into all areas of society. As a result, the amount of floating volcanic ash will become extremely large, and as mentioned above, it will have a negative impact on the safety and health management and health of all businesses, businesses, and households, hindering the activities of important government agencies, airports, railway transportation, hospitals, school air conditioning, public power utilities, communications services, fire and police forces, and other social security infrastructure facilities. It will reach a level like that.

[0005] Volcanic ash is transported by rain and wind and then fixed in the soil by grass and other plants. However, during large-scale ashfall, this process occurs very slowly, resulting in ash accumulation on the ground and requiring manual cleanup and removal from critical infrastructure and residential areas. Furthermore, winds can re-introduce ash into areas that have already been cleared, meaning that ash will remain suspended in the air over and around communities for months, or even years, after an eruption.

[0006] However, the filters in the filter equipment system are significantly affected by volcanic ash, and the maintenance work for the various filter equipment used in volcanic areas requires a great deal of effort. This is because frequent replacement of filters in filtration systems and other maintenance work is essential for several months after volcanic ash falls. Similar concerns existed regarding filters in air conditioners and heating appliances.

[0007] In light of the above situation, the inventors have already devised the idea that the type of volcanic ash, and in particular the particle size ratio of the volcanic ash, differs depending on the volcano that erupts in each region, and that a volcanic ash filter system used to capture volcanic ash with different particle size ratios should use different filter media, etc.

[0008] Furthermore, they developed an experimental device capable of reproducing actual volcanic ash fall. In other words, in the reproduction test using this experimental device, it was possible to conduct ash fall tests using, for example, the Cabinet Office's ash fall simulation conditions for volcanic eruptions as a reference. As a result, they discovered that volcanoes in different regions each have their own unique particle size ratios of volcanic ash, and that filters should be constructed using filter media with mesh openings that correspond to those particle size ratios, and that the filter's inlet should have an attachment shape that corresponds to those particle size ratios.

[0009] Based on this, the inventors began developing an automatic volcanic ash cleaning filter device system that can reliably capture volcanic ash, regardless of the volcanic ash that falls from any volcanic region, and that does not require filter replacement even after long-term use. In other words, there was a demand for an automatic dust-cleaning filter system for volcanic ash and other particles that could be used for long periods of time without the need for filter replacement, and that could efficiently remove volcanic ash, in particular volcanic ash, when used in areas of active volcanic activity, and that would not cause the filter to become clogged due to the capture of volcanic ash, rendering the filter of important atmospheric infrastructure equipment unusable. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-57894 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0011] Thus, the present invention has been devised to address the above-mentioned conventional problems and demands, and aims to provide an automatic volcanic ash cleaning filter device system that can reliably capture volcanic ash, regardless of the volcanic ash that falls from any volcanic region, and that does not require immediate maintenance in the event of an emergency, such as replacing the primary and secondary filter members, even after long-term use.In other words, to provide an automatic volcanic ash cleaning filter device system that can efficiently remove volcanic ash when used in areas of active volcanic activity, and that does not cause the filter to become clogged with volcanic ash, making the filter unusable. [Means for solving the problem]

[0012] The self-cleaning dust filter device system of the present invention comprises: a suction section forming means for forming a suction section having a structure capable of suppressing the amount of dust sucked in; a passage forming means for forming a passage having a structure capable of capturing the sand and dust sucked in by the formed suction section; and a dust adhesion state measuring means for measuring the state of dust adhesion on a filter having a filter surface facing downward to prevent the intrusion of dust that has passed through the passage. a filter cleaning means for cleaning the filter to which dust has adhered when the dust adhesion state measured by the dust adhesion state measuring means exceeds a determined threshold value; At least two or more processing sections each equipped with the dust adhesion state measuring means and the filter cleaning means are provided, and when the dust adhesion state in one processing section exceeds the threshold value, the operation of the processing section in that section is switched to the operation of the processing section in the other section, and the filter cleaning is performed by the filter cleaning means in the one processing section, and a control means is provided for controlling the dust processing so that it does not stop. It is characterized by the fact that or The dust is volcanic ash or sand dust. It is characterized by the fact that or The suction forming means is controlled by a suction portion forming control unit of the control means. It is characterized by the fact that or The passage forming means is controlled by a passage forming control unit of the control means. It is characterized by the fact that or the adhesion state measuring means is controlled by a measurement control unit of the control means; It is characterized by the fact that or The filter cleaning means is controlled by a cleaning control unit of the control means. It is characterized by the following.

[0013] That is, the automatic dust cleaning filter device system of the present invention comprises a suction section forming means for forming a suction section with a structure capable of suppressing the amount of suction of dust, a passage forming means for forming a passage with a structure for capturing sand dust and dust sucked by the formed suction section midway through its passage and removing volcanic ash from the air, a dust adhesion state measuring means for measuring the state of dust adhesion on a filter equipped with a duct layout in which the filter surface is arranged downward to prevent the intrusion of dust that has passed through the passage, and a dust adhesion state measuring means for automatically ventilating the filter device when the dust adhesion state measured by the dust adhesion state measuring means exceeds a determined threshold value. The system includes a filter cleaning system that switches the passageway of the volcanic ash and automatically cleans any clogged passageways, and at least two or more treatment process sections equipped with the dust adhesion state measuring means and filter cleaning means are provided in multiple rows.When the dust adhesion state in one treatment process section exceeds the threshold value, the air passageway of the treatment process section at that location is automatically switched to another volcanic ash treatment filter row, and the automatic filter cleaning means automatically switches into a filter cleaning control mode, performing automatic volcanic ash filter control processing that prevents adverse effects on facility equipment and prevents the equipment from stopping, even when important infrastructure equipment is in operation.

[0014] Furthermore, continuous measurements by the dust adhesion state measuring means on the switched passage side can be maintained by a control means that switches to measurement at the treatment process section on the other row, and by repeating this operation, volcanic ash capture and removal processing can be performed on one side of the route, and at the same time, automatic cleaning of the volcanic ash filter route device can be performed on the other side, making it an automatically continuous volcanic ash treatment control device system that can simultaneously and repeatedly perform volcanic ash filter dust removal processing and automatic filter cleaning control. Furthermore, the aforementioned volcanic ash filter device has multiple rows of passageways, and it is recognized that the greater the number of parallel volcanic ash processing filter paths, the longer the durability will be in the event of a long-term volcanic eruption. [Effects of the Invention]

[0015] The automatic volcanic ash cleaning filter system of the present invention can reliably capture volcanic ash, regardless of the type of volcanic ash that falls from any volcanic region, and does not require replacement of the filter members even after long-term use. In other words, when used in areas of active volcanic activity, it is possible to provide an automatic volcanic ash cleaning filter system that can efficiently remove volcanic ash and does not become clogged with volcanic ash, rendering the filter unusable. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic diagram illustrating the schematic configuration of a system according to the present invention; [Figure 2] FIG. 2 is a diagram illustrating the configuration of a control means according to the present invention. [Figure 3] 1 is a schematic diagram illustrating the configuration of the present invention. [Figure 4] FIG. 2 is a schematic diagram illustrating an installation state of a filter. [Figure 5] FIG. 4 is an explanatory diagram illustrating an attachment state of a vibration generating member. [Figure 6] FIG. 2 is a schematic diagram illustrating the configuration of a collision device. [Figure 7] FIG. 2 is a schematic diagram illustrating the configuration of a processing section. [Figure 8] FIG. 10 is an explanatory diagram illustrating a specific example of a pressure loss value at which a filter is switched to cleaning. BEST MODE FOR CARRYING OUT THE INVENTION

[0017] The present invention will now be described with reference to the embodiments shown in the drawings. Fig. 1 is a schematic explanatory diagram showing an outline of the system according to the present invention. As shown in Fig. 1, the automatic dust cleaning filter device system according to the present invention comprises suction section forming means 2 for forming suction section 1 with a structure capable of suppressing the amount of suction of dust such as volcanic ash, passage forming means 4 for forming passage 3 with a structure capable of efficiently capturing volcanic ash sucked by said suction section 1, adhesion state measuring means 6 for measuring the state of dust adhesion on filter 5, which is arranged with the filter surface facing downward to prevent the intrusion of dust that has passed through said passage 3, and a dust cleaning device that acts on said filter 5 to clean the filter 5 from which dust has adhered when a value indicating the adhesion state measured by said adhesion state measuring means 6 exceeds a set threshold value. The system is provided with at least two or more treatment process sections 8 each equipped with a filter cleaning means 7 and the adhesion state measuring means 6 and filter cleaning means 7, and when the value indicating the adhesion state in one treatment process section 8 exceeds the threshold value, the route to that treatment process section 8 is switched to another treatment process section 8, allowing the operation of the volcanic ash filter treatment device to continue, and while the operation continues, the treatment process section 8 that exceeds the threshold value is switched to filter cleaning mode using the filter cleaning means 7, and filter cleaning is carried out, and is configured with switching means 16 that switches so that measurement by the adhesion state measuring means 7 is carried out in the other treatment process section 8 (see Figure 1).

[0018] Furthermore, as can be seen from Figure 2, the suction part forming means 2 is controlled by the suction part formation control unit 30 of the control means 9 to form the suction part 1 with an optimal structure that can reduce the amount of dust such as volcanic ash that is sucked in. That is, the suction section formation control section 30 of the control means 9 receives input of local volcanic ash data 27, such as the type of volcanic ash in the area where the system of the present invention is being constructed, the particle size ratio of the volcanic ash, and the predicted amount of ash fall, as well as various ash fall simulation condition data 28 in the event of a volcanic eruption in the volcanic area provided by the Cabinet Office, and based on this data, controls the formation of suction section 1 so that it has a structure that can appropriately suck in the amount of dust and volcanic ash that the system of the present invention installed in the area will suck in.

[0019] Referring to Figure 3, the suction port 25 is configured to open downwards, preventing a large amount of volcanic ash from being sucked in through the suction port 25. This configuration allows the relatively heavy volcanic ash to fall to the bottom before entering the suction port 25. Furthermore, the suction section forming means 2 is provided with a suction volume adjustment damper 10 at the suction port 25, the opening of which faces downward, and is configured so that the suction volume adjustment damper 10 can be operated and controlled by the suction section formation control section 30 of the control means 9 to optimize the suction section 1 for the volcanic region. Note that this control also references local volcanic ash data 27, such as the type of volcanic ash, the particle size ratio of volcanic ash, and predicted ash fall amount in the region where this system is constructed, as well as various ash fall simulation condition data 28 provided by the Cabinet Office in the event of a volcanic eruption in the volcanic region.

[0020] A schematic diagram of the configuration is shown in Figure 3. As can be seen from Figure 3, the suction unit 1 is optimally installed so that the opening serving as the suction port 25 is on the lower side in the approximately vertical direction and the opening surface is horizontal. Around the suction port 25, large, heavy volcanic ash particles fall to the bottom before being sucked into the suction port 25. This is because it has been confirmed that light, fine volcanic ash is mainly sucked in through the suction port 25.

[0021] Additionally, the opening direction of the suction port 25 may be gradually tilted diagonally to the left or right depending on the ratio of the sizes of the falling volcanic ash and the amount of ash that falls, so that the suction section formation control section 30 of the control means 9 can control it to perform optimal suction. In addition, a suction volume adjustment damper 10 is provided near the suction port 25 so that the opening width and opening direction can be changed, and this suction volume adjustment damper 10 can be adjusted and controlled by the suction section formation control unit 30. By controlling in this way, the suction section 1 of the present invention can be configured to obtain optimal suction efficiency using the suction section formation means 2 depending on the conditions of the volcanic ash fall area.

[0022] Next, the path formation control section 31 of the control means 9 controls the path formation means 4 so that the volcanic ash sucked in by the suction section 1 configured as described above is formed into a path 3 with a structure that prevents adhesion or retention. However, this control also refers to local volcanic ash data 27, such as the type of volcanic ash in the area where the system is constructed, the particle size ratio of volcanic ash, and the predicted amount of ash fall, as well as various ash fall simulation condition data 28 provided by the Cabinet Office in the event of a volcanic eruption in the volcanic area in question, and is controlled to form an optimal path 3 with a structure that can efficiently capture volcanic ash, for example, by smoothly capturing and removing it in stages according to particle size from the entrance. Specifically, as shown in Figure 3, the path forming means 4 determines whether the path 3 should be configured in two or more vertical rows, and also determines how many baffle plates or eliminators 11, which are provided to prevent the passage of volcanic ash, should be arranged in the path 3 and in what orientation (up and down or left and right), thereby forming the optimal path 3.

[0023] In the embodiment shown in Figure 3, the passage 3 is configured with three rows of passages extending vertically. That is, volcanic ash that has passed through the suction section 1 rises in the first row of passages 3 and then descends in the second row of passages 3. During the descent, the heavy volcanic ash falls and accumulates at the bottom of the route duct. Furthermore, the volcanic ash that does not fall will enter the filter 5 installed in the third row aisle 3. In this case, the volcanic ash will also collide with the filter 5 and fall to the bottom.

[0024] Incidentally, multiple baffle plates or eliminators 11 are installed at an angle in the first and second rows of passages 3. By installing multiple baffle plates or eliminators 11 with this structure, the behavior of volcanic ash can be controlled by obstructing the flow of volcanic ash, and by creating a complex flow, it is possible to efficiently capture most of the volcanic ash in stages according to its particle size as it descends vertically, particularly in the second row of passages 3, and allow it to fall. In other words, as mentioned above, after being sucked in from below, the volcanic ash rises once, then falls again, and each time the airflow direction changes by 180 degrees, the ash collides with the walls of Passage 3, and then with the sides and corners of Passage 3, causing it to be knocked down.

[0025] Furthermore, a baffle plate or eliminator 11 for dropping volcanic ash located within the passage 3 can shake off much of the volcanic ash, thereby reducing the overall amount of volcanic ash taken into the passage. Baffle plates or eliminators 11 are also installed in a zigzag pattern within the second row of passages 3, and as the ash moves through this second row of passages it falls vertically, resulting in extremely little ash in the second row of passages 3. This is because large, medium and large particles of ash in particular fall and are removed.

[0026] As shown in Figure 3, the bottom of the second row of passages 3 has one or more recesses recessed below the top of the bottom. By providing such recesses, volcanic ash that falls vertically falls toward the recesses and accumulates in them. In other words, it does not accumulate on the bottom of passage 3. Therefore, only the wind is directed toward the filter 5, which has the great effect of preventing excessive adhesion of volcanic ash to the filter 5. The bottom of the recess is preferably constructed with an openable lid that swings downwards to open. When the lid is opened, the volcanic ash that has fallen into the recess and accumulated there can be easily removed (see Figure 3).

[0027] As already explained, the volcanic ash sucked into the passage 3 comes into contact with the baffle plate or eliminator 11, which makes it easier for the ash to fall, and the fallen volcanic ash accumulates in the bottom and recesses of the passage 3. During operation of the system of the present invention, the suction force (negative pressure) of the suction fan 35, which is composed of a blower fan or the like, is generated within the passage 3, and this suction force makes it difficult to discharge the volcanic ash that has accumulated in the bottom and recesses of the passage 3 to the outside. In other words, if the discharge valve that leads to the outside is opened while the suction force (negative pressure) of the suction fan 35 is generated within the passage 3, outside air will enter the passage 3, and the volcanic ash will fly up within the passage 3. However, the present invention has made a new technological innovation to solve this problem as well.

[0028] In order to prevent the above situation, in the present invention, when the waste valve is opened, the suction fan of the dust collector located on the outside is operated, and a suction force (negative pressure) stronger than the suction force (negative pressure) of the suction fan 35 composed of the blower fan, etc. is applied, so that the volcanic ash accumulated on the bottom surface and recesses of the passage 3 can be instantly sucked out to the outside. Here, there is no limitation on the material of the baffle plate or eliminator 11, but it may be made of, for example, an iron plate, a resin, or a nonwoven fabric that allows air to pass through.

[0029] Next, at the point where the passage 3 has passed, a filter 5 that prevents volcanic ash from entering is installed with its filter surface facing downwards, and installing the filter 5 with its filter surface facing downwards is a major feature of the present invention, as it prevents volcanic ash from entering the interior of the facility. In particular, in the case of a filter 5 that is installed with a V-shaped groove waveform, volcanic ash tends to adhere to the bottom of the V-shaped grooves, but if the filter 5 is installed with its filter surface facing downwards, the volcanic ash may not remain at the bottom of the V-shaped grooves but may fall downwards due to its own weight.

[0030] However, if the filter 5 is used for a long period of time, volcanic ash will adhere to the surface of the filter 5, causing the pressure loss value to deteriorate. In such cases, the filter 5 had to be replaced in the past, but in the present invention, the filter 5 does not need to be replaced for a long period of time because the filter 5 is designed to be automatically cleaned without removal.

[0031] The optimal requirement for the filter 5 used here is to use a filter from the Nanpu patented product owned by Unipack Co., Ltd., of which the inventor of this case is the representative, for which a patent application has already been filed and the patent rights have been obtained. In other words, it is believed that the use of the patented Nanpu Volcanic Ash Filter series, which has a special filter material specification, will ensure optimal operation of the automatic cleaning system of the present invention.

[0032] The present invention is configured so that the state of volcanic ash adhering to the filter 5, which is constantly being measured, can be recognized by various methods. Note that any measurement method can be used in the present invention as long as it can measure the state of volcanic ash adhering to the filter 5. One example of a method for measuring this is to measure the pressure loss state value of the filter 5.

[0033] When volcanic ash passes through the filter 5, the filter 5 acts as a resistance, causing a pressure loss (pressure loss, pressure difference). Pressure loss is an important parameter that affects the pressure required for filtration and the filter life. The pressure loss of the filter alone when there is no clogging or cake (a layer of particles that forms on the filter 5) is called the initial pressure loss.

[0034] The initial pressure loss of many filters 5 is expressed by the following formula. TIFF2025119253000002.tif1493ΔP: Pressure loss [Pa] u: Flow velocity [m / s] (= flow rate [l / min] ÷ filtration area [cm 2 ]×1 / 6) α: Viscous drag coefficient [m- 1 ] β: Inertial resistance coefficient [-] μ: Viscosity [Pa s] ρ: Density [kg / m 3 ] The viscous resistance coefficient α and the inertial resistance coefficient β are filter-specific coefficients that can be determined by calculation, air permeability tests, and fluid analysis. The resistance coefficients α and β of the main plain weave, twill weave, plain tatami weave, and twill tatami weave wire mesh are listed in the product catalog. The resistance coefficient α of Bekipore is also listed in the product catalogue.

[0035] The above formula can be used to measure the pressure loss value of the filter 5 during use. However, a pressure loss meter is usually used to measure the pressure loss value of the filter 5, and the present invention is configured so that when an increase in the value up to a predetermined pressure loss that should be measured by the pressure loss meter is confirmed, the increased value is output as a warning. When the adhesion state value measured by the adhesion state measuring means 6 exceeds a set threshold value, the content of the measurement is output from the measurement control section 32 of the control means 9 to the cleaning control section 33. Then, the cleaning control section 33 receives the output and controls the filter cleaning means 7 to operate, which acts on the filter 5 to clean the filter 5 from which dust has adhered.

[0036] As the threshold values, values such as filter pressure loss values of 150 PA, 200 PA, and 250 PA, which are generally used as a guide for replacing the filter 5, are used as shown in FIG. That is, when the pressure loss value of the filter 5 reaches 150 PA, 200 PA, or 250 PA, the filter 5 has conventionally been replaced as described above, but in the present invention, when these pressure loss values are measured, the filter 5 does not need to be removed and replaced, and the filter cleaning means 7 operates in that state, allowing the filter 5 to be cleaned in the attached state. However, this control is also performed by outputting from the measurement control section 32 of the control means 9 to the cleaning control section 33.

[0037] A specific device for the filter cleaning means 7 will now be described. Figure 4 is a schematic explanatory diagram showing the state in which the filter 5 of the present invention is installed. As can be seen from Figure 4, the filter 5 is attached within a rectangular frame 12. Furthermore, four filters 5 attached within the frame 12 are further attached within a frame main body 13 to form one filter section 14. However, there is no limit to the number of filters 5.

[0038] As can be seen from FIGS. 5 and 6, a vibration generating member 15 is attached to the end of the filter section 14, and the vibration generating member 15 is configured to apply vibrations to the filter 5. The vibration generating member 15 applies vibrations in the left-right direction to the filter unit 14, which is installed in the horizontal direction. Note that by changing the settings of the vibration generating member 15, it is possible to apply vibrations not only in the left-right direction but also in the up-down direction.

[0039] In the present invention, for example, when the pressure loss value measured by the adhesion state measuring means 6 is 150 PA, the vibration generating member 15 is activated to vibrate the filter 5, shaking off the volcanic ash from the filter 5 and returning the filter 5 to its initial pressure loss value. Figure 5 is a diagram illustrating a vibration generating member 15 attached to the side end of a horizontally arranged filter 5, with the vibration generating member 15 attached to one side end of the filter section 14 to which the filter 5 is attached. A connecting member 18 is fixed to a fixed rod 21 such as a support column via a cushion member 20. When the vibration generating member 15 operates, the filter 5 of the filter section 14 vibrates left and right and / or up and down, causing the volcanic ash adhering to the underside of the filter 5 to be shaken off downward.

[0040] Next, when the pressure loss value measured by the adhesion state measuring means 6 is, for example, 200 PA and the volcanic ash adhering to the filter 5 cannot yet be completely removed, a collision device 23 is used, which causes a collision rod 22 to collide with the frame body 13 multiple times, as shown in Figure 6. This collision action also makes it possible to remove volcanic ash that has firmly adhered to the bottom grooves of the filter 5, which is configured in a U-shaped or V-shaped waveform.

[0041] Furthermore, when the pressure loss value measured by the adhesion state measuring means 6 is, for example, 250 PA, or when the filter 5 does not recover to the initial pressure loss value even after the operation of the vibration generating member 15 and the collision device 23, the air blow device 24 shown in Figure 4 is used. As shown in Figure 4, the blower unit 29 of the air blower 24 is provided so as to be freely movable horizontally above the filter 5. An operating member such as an air pump is then operated to eject air from the blower unit 29 so that it passes from the top to the bottom of the filter 5. The ejected air then easily removes volcanic ash adhering to the bottom grooves of the filter 5, which are configured in a U- or V-wave shape, for example.

[0042] Here, the cleaning control unit 33 of the control means 9 can arbitrarily change the setting for determining whether to start operation of various automatic pressure loss recovery devices, such as the vibration generating member 15, the collision device 23, the air blow device 24, etc., i.e., whether the control operation point is when the pressure loss value of the filter 5 is 150 PA, 200 PA, or 250 PA.

[0043] In addition, it is possible to arbitrarily change the settings as to which automatic pressure loss recovery device to use. Furthermore, the number of times each pressure loss automatic recovery device is used can also be arbitrarily set and changed. Moreover, the cleaning control section 33 of the control means 9 can also set control to activate the operation of the present invention simultaneously with a volcanic eruption.

[0044] The system of the present invention has a filter 5 that prevents the intrusion of volcanic ash, an adhesion state measuring means 6 that measures the state of volcanic ash adhesion to the filter 5, and multiple treatment process sections 8 that are equipped with the filter cleaning means 7 mentioned above (see Figures 3 and 7). When the value of the adhesion state of volcanic ash and the like measured by the adhesion state measuring means 6 in one of the treatment process sections 8 that is in operation exceeds the threshold value, the treatment process section 8 is switched by the automatic switching control operation of the volcanic ash filter treatment path by the switching means 16.

[0045] The process switches to the treatment process unit 8 on standby for the route that has already been cleaned. Then, the treatment process unit 8, which had been filtering out dust such as volcanic ash, switches from capturing and processing the dust to cleaning the filters using the filter cleaning means 7. In detail, the processing process section switching control unit 34 of the control means 9 operates the switching means 16, and controls the switching from one processing process section 8 in which filter cleaning is being performed by the filter cleaning means 7 to the other processing process section 8 in which filter cleaning by the filter cleaning means 7 is not being performed.

[0046] Then, in the other treatment process section 8 that has been switched to, a new filter 5 with a pressure drop value set to the initial value will be used, and the removal of volcanic ash will be able to continue using the new filter 5 without interrupting the operation of the system. As shown in Figure 3, suction volume adjustment dampers 10 are provided below the filters 5 in the treatment process sections 8 on one side and the other side, and by controlling the opening and closing of each of the suction volume adjustment dampers 10, it is possible to switch from one treatment process section 8 where the filter 5 needs to be cleaned to the other treatment process section 8 where an unused or cleaned filter 5 is installed, without stopping the dust removal work.

[0047] FIG. 7 also illustrates the control state of the switching. In Fig. 7, two processing sections 8 each equipped with a filter 5 are provided on one side and the other side, and two passages 3 are provided connecting to the processing sections 8 on one side and the other side.

[0048] Here, the number of treatment process sections 8 is not limited to two, and there is no limit to the number as long as it is two or more. Furthermore, the plurality of treatment process sections 8 are each provided with the same number of passages 3 as described above, but there need only be at least two. In other words, it is sufficient if one treatment process section 8 and the passage 3 leading thereto can be cleaned, and the other treatment process section 8 and the passage 3 leading thereto can also be cleaned. That is, when cleaning the filter 5 in the processing section 8, the passage 3 leading to it is also not used, and the upper surface of the passage, the side surface of the passage, and the baffle plate or eliminator 11 in the passage 3 can be cleaned in the same way as cleaning the filter 5. Here, when cleaning the upper surface of the passage, the side surface of the passage, the baffle plate or eliminator 11 in the passage 3, the various automatic pressure loss recovery devices used when cleaning the filter 5 in the processing section 8, such as the vibration generating member 15, the collision device 23, the air blow device 24, etc., are used.

[0049] In Figure 7, the symbol 35 denotes a suction fan, and when the suction fan 35 is activated, air containing dust such as volcanic ash is sucked in from the outside through the suction section 1 into the passage 3 and filter 5. 2, the control means 9 is equipped with a suction section formation control section 30, a passage formation control section 31, a measurement control section 32, a cleaning control section 33, and a treatment process section switching control section 34. These control sections interact with each other to ensure smooth and repeated operation of the system.

[0050] The control means is generally configured with a computer control device, etc. An example of such a control device is a control device capable of PLC control. Here, PLC stands for Programming, Logistics, and Controller. A PLC control device can output directly to a vibrator that applies vibration, a solenoid valve that sends out blow, a magnet relay, an INV, etc., and can perform detailed operation control of the vibrator and solenoid valve. Furthermore, if the control device is capable of performing the PLC control, the automatic cleaning operation inside the passage 3, which is the air conveying path, can be controlled by varying the strength of the vibrator and solenoid valve while the passage 3 is not in use, i.e., when the suction operation by the filter 5 is stopped and the filter 5 is being cleaned, and not only this, but it can also be controlled so that the operation of the vibrator and solenoid valve can be reduced even when the passage 3 is in use, i.e., when the filter 5 is in suction operation (dynamic state).

[0051] However, if too much stimulation is given to the passage 3 while the filter 5 is in suction operation (dynamic state), it may send dust particles such as volcanic ash toward the filter 5 instead. In other words, when cleaning volcanic ash and other dust particles while the filter 5 is in suction operation (dynamic state), it is sufficient to not actively clean the inside of the passage 3, but to lightly remove the volcanic ash and other dust particles that have settled on the surface inside the passage 3. Therefore, the automatic cleaning operation inside the passage 3 while the filter 5 is in suction operation does not use devices such as vibrators or knockers, but is controlled to use a milder stimulus than these, in other words, a slight breeze blowing, etc. A PLC control device is ideal for this type of control.

[0052] (System Overview) As described above, in the system of the present invention, the suction section 1 is formed by the suction section formation control section 30 into a suction section 1 that can suppress the suction of volcanic ash, and the passageway formation control section makes the passageway 3 to the filter 5 into a passageway 3 that is less likely to accumulate or adhere to volcanic ash. The filter 5 installed at the point where the passage 3 passes is designed so that its surface faces downwards, making it easier for volcanic ash to fall to the bottom. The downward installation direction of the filter 5 can be slightly changed according to the client's needs.

[0053] In other words, the present invention is designed to reduce the amount of volcanic ash absorbed, allowing relatively large particles of volcanic ash to fall to the surrounding area, and to absorb fine particles and light volcanic ash, making it difficult for volcanic ash to accumulate in the filter 5. Furthermore, in this invention, taking into consideration that the quality of volcanic ash varies depending on the volcanic ash fall area, the size of the filter 5 is pre-varied, and the type of filter 5 can be selected according to the results of volcanic ash fall simulations conducted by specialized institutions such as the Japanese government.

[0054] In other words, it is possible to select a filter of volcanic ash size that matches the expected ash particle fall in each region, which not only improves the dust blocking rate of filter 5 but also extends its lifespan. As mentioned above, the volcanic ash that has accumulated at the bottom of the mesh of the filter 5 is gradually cleaned by the various filter cleaning means 7 mentioned above, and the pressure loss value can be returned to near the initial value.

[0055] The system then uses various filter cleaning means 7 to remove volcanic ash particles adhering to the filter surface according to the measured pressure loss value. Furthermore, when the volcanic ash that falls below filter 5 and accumulates at the bottom has accumulated to a certain extent (automatic lightweight weight - center approx. 1000g (set value can be changed as desired)), the automatic volcanic ash discharge damper is released, allowing the accumulated volcanic ash to be instantly discharged outside the room in a timely manner or forcibly.

[0056] Incidentally, the filters 5 used to remove volcanic ash are often installed inside installation rail support guide frames, and are often installed in various locations such as cooling towers, power generation equipment, mechanical equipment air intakes, and air conditioning air intake filter frames. Structurally, it consists of a fixed equipment base and a vibration frame. The bracket of the fixed base and the filter frame of the vibration part are connected with special connecting bolts, and a vibration rubber is sandwiched between them.

[0057] This rubber is the point that forms the connection between the fixed equipment frame and the vibration side filter case, and there are multiple fixed / vibration part connection bolt points for multiple filter units, so the configuration can be customized and various filter cleaning means can be attached. This structure allows the automatic vibrator to vibrate mainly the filter mounting side, allowing volcanic ash to fall off the filter media surface and filter plate. The range of the vibration frame can also be freely set.

[0058] Filter 5 is made of a special material, and its shape has U-shaped or V-shaped protrusions that allow some areas to collect volcanic ash and others not, so even if a certain amount of volcanic ash accumulates, the filter structure allows air to continue passing through. Filter 5 is also made of a material with extremely low surface tension, which makes it slippery and makes it difficult for debris to adhere. Furthermore, the filter's shape is designed to prevent volcanic ash from accumulating, and the protruding parts are designed to prevent volcanic ash from adhering to them. Various mesh sizes are available for the filter material, allowing users to select the mesh that best suits their region, enabling a long service life through self-regeneration. In addition, the filter's lifespan can be further extended with the addition of automatic forced regeneration control, i.e., automatic pressure loss regeneration control.

[0059] In the mode of the static filter cleaning means 7, the vibration generating member 15 is automatically operated to remove the volcanic ash that has clogged the filter. Furthermore, the collision device 23 automatically operates, shaking the volcanic ash that has stubbornly stuck to the ground. In the final cleaning operation, the vibration generating member 15, the impact device 23, and the air blow device 24 operate in combination simultaneously, thereby removing the volcanic ash from the filter 5.

[0060] In this way, this system can provide a long-life volcanic ash filter system through dynamic filter cleaning control and static cleaning control using the combined technology of the filter cleaning means 7 described above. [Explanation of symbols]

[0061] 1. Intake section 2. Suction section forming means 3 aisles 4 Passage forming means 5 Filters 6. Adhesion condition measurement means 7. Filter cleaning method 8 Processing Department 9. Control Measures 10 Suction volume adjustment damper 11 Baffle plate or eliminator 12 Frame 13 Frame body 14 Filter section 15 Vibration generating member 16 Switching Method 18 Connecting member 20 Cushion member 21 Fixed rod 22 Collision rod 23 Collision device 24 Air blower 25 Intake port 27 On-site volcanic ash data 28 Cabinet Office volcanic eruption ash fall simulation condition data 29 Blow section 30 Suction section formation control section 31 Passage formation control unit 32 Measurement control section 33 Cleaning control section 34 Processing process switching control unit 35 Suction fan

Claims

1. a suction section forming means for forming a suction section having a structure capable of suppressing the amount of dust sucked in; a passage forming means for forming a passage having a structure in which the dust sucked in by the formed suction section does not adhere or remain; and a dust adhesion state measuring means for measuring the state of dust adhesion to a filter having a filter surface facing downward to prevent the intrusion of dust that has passed through the passage; a filter cleaning means for cleaning the filter to which dust has adhered when the dust adhesion state measured by the dust adhesion state measuring means exceeds a determined threshold value; At least two or more processing sections each equipped with the dust adhesion state measuring means and the filter cleaning means are provided, and when the dust adhesion state in one processing section exceeds the threshold value, the operation of the processing section in that section is switched to the operation of a processing section in the other section, and in the one processing section, filter cleaning is performed by the filter cleaning means, and a control means is provided for controlling so that dust processing does not stop. A self-cleaning filter device system.

2. The dust is volcanic ash.

2. The self-cleaning filter device system of claim 1.

3. The suction forming means is controlled by a suction portion forming control unit of the control means.

2. The self-cleaning filter device system of claim 1.

4. The passage forming means is controlled by a passage forming control unit of the control means.

2. The self-cleaning filter device system of claim 1.

5. the adhesion state measuring means is controlled by a measurement control unit of the control means; 2. The self-cleaning filter device system of claim 1.

6. The filter cleaning means is controlled by a cleaning control unit of the control means.

2. The self-cleaning filter device system of claim 1.

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