JP5164622B2 - Dust remover - Google Patents

Description

  The present invention relates to a dust removal device, and more particularly, for example, air in a car inspection station or a maintenance factory from which exhaust gas containing particulate pollutants is discharged, in various factories where dust is generated, or in a dusty room. The present invention relates to a dust removing apparatus that is most suitable for collecting and cleaning particulate pollutants, dust, or dust contained in the air when the air is discharged to the outside.

  For example, in car inspection halls and maintenance factories of automobiles, engine maintenance including concentration inspection of nitrogen oxides in exhaust gas emitted from inspection vehicles, noise reduction effect inspection of silencers, and adjustment of idling is performed. Since such inspections and maintenance are performed with the automobile engine being driven, the air in the vehicle inspection yard and maintenance shop is contaminated with exhaust gas. In addition, a large amount of dust and dust is generated at tunnel excavation sites, buildings under construction, and ironworks and lumber mills, and the dust drifts into the sealed work site. make worse.

  As a measure for improving the environment in such vehicle inspection yard, maintenance factory, or work site (hereinafter simply referred to as dust generation facility), many of these dust generation facilities have air purification systems. Air in the dust generation facility is released to the atmosphere via a dust removal device, etc., thereby improving the environment in the dust generation facility and preventing the release of particulate pollutants, dust, or dust into the atmosphere. ing. A filter medium is incorporated in the dust removing apparatus used in such an air purification system, and particulate contaminants, dust, or dust contained in the air is collected by the filter medium.

In general, this type of dust remover periodically replaces the filter medium with a type having a removal mechanism that can remove dust, dust, or particulate contaminants collected by the filter medium from the filter medium in the dust remover. There are types. Among these, a dust removal apparatus of a type that periodically replaces the filter medium is required to use a filter medium that retains a large amount of dust, dust, or particulate contaminants (collected amount) and has high durability. Conventionally, a filter (Patent Literature 1 and Patent Literature 2) folded in a zigzag shape is generally used for a dust removing device used for improving the working environment. The reason why this filter is folded in a zigzag manner like the filters described in Patent Document 1 and Patent Document 2 is to store the filter in a relatively small space and to process a large amount of air flow, to obtain a proportional filtration area. Because.
Japanese Patent Laid-Open No. 2003-024732 JP 2006-043669 A

  However, in the conventional filter medium, since the filter is folded in a zigzag shape and stored in a case or the like as described above, most filters are formed thin. As a result, this type of conventional filter has a low amount of dust, dust, or particulate matter, so the filter replacement cycle is short and the collection efficiency is low. There was a problem that the degree of purification of air released into the atmosphere was not so good.

  Therefore, in place of the conventional filter, a filter (filter material) formed of non-combustible or flame-retardant fibers with a large collection amount of dust, dust, or particulate matter and high collection efficiency has been developed. Such a filter medium has a mat shape and is much thicker than a conventional filter. Therefore, when a dust removal device is configured by housing a plurality of filtration units using this filter medium in a casing, the dust removal device becomes large because a casing having a very large volume is required. The reason for this is that when a plurality of filtration units are placed in a relatively small volume casing in an attempt to avoid an increase in the size of the dust removal device, the filter media of adjacent filtration units come into contact with each other and block most of the ventilation surface. As a result, the amount of processing air is reduced, and as a result, the dust removal capability is significantly reduced. For this reason, a major issue is how to reduce the size of a dust removal device with a high dust removal performance using the filtration unit using the above-described filter medium having a large collection amount and high collection efficiency. It was.

  An object of the present invention is to solve such a conventional problem, and is high in the collection efficiency of dust, dust, or particulate contaminants contained in the air, and further increases the collection amount thereof. Another object of the present invention is to provide a small dust removing apparatus including a plurality of filtration units using a non-combustible or flame-retardant fiber as a filter medium having a long exchange cycle, or a filter medium made of woven or non-woven fabric treated in such a manner.

  In order to solve the technical problem described above, the present invention is configured as follows. That is, the present invention is a dust removing device that collects and cleans particulate pollutants, dust, and dust contained in the air, and the feature thereof is that the inside is a first chamber and a second chamber. A plurality of filtration units disposed adjacent to each other in the first chamber of the casing, and at least a spacer installed between the adjacent filtration units. The filtration unit has at least a ventilated and rigid wall surface portion, and has a box-shaped support frame body having a space portion surrounded by the wall surface portion, and is attached to the wall surface portion of the support frame body. The internal space of each filtration unit communicates with the second chamber through an opening formed in the support frame, and the filter medium is nonflammable or flame retardant. It is made of fiber and 25.0mm-8 A mat having a thickness of 0.0 mm, and the spacer is disposed between the filter medium in one of the filtration units disposed in the first chamber of the casing and the filter medium in the other filtration unit adjacent to the filter medium. In addition to being arranged, it is formed in a structure that allows ventilation.

  The dust removing apparatus of the present invention is composed of the essential components described above, but the components may be specifically as follows. The specific structure is that the spacer is also disposed between the filter medium of the filtration unit disposed adjacent to the inner wall of the casing in the first chamber to avoid contact between the filter medium and the inner wall of the casing. ing.

  In the dust removal apparatus of the present invention, the filter medium of each filtration unit is composed of a first filter medium layer and a second filter medium layer laminated on the surface of the first filter medium layer, and the first filter medium layer is The second filter medium layer has a thickness of 20.0 mm to 60.0 mm, and the second filter medium layer has a thickness of 5.0 mm to 25.0 mm, and the second filter medium layer is denser than the first filter medium layer. It is formed with a simple structure.

Moreover, in the dust removal apparatus of the present invention, the first filter medium layer and the second filter medium layer are made of any one of glass fiber, rock wool, and a non-flammable or flame-retardant woven or non-woven fabric. Yes. Further, in filtration apparatus of the present invention, the first filter medium layer having a basis weight in the range of ^{15kg / m 3 ~30kg / m 3} , the second filter layer has a basis weight of 40kg ^{/ m 3} ~90kg ^/ m 3 It is preferable that it is the range of these.

  According to the dust removing device of the present invention, the filter medium constituting the plurality of filtration units installed in the casing has a mat-like thickness excellent in dust collection efficiency, and is nonflammable or flame retardant. Filter material in each filtration unit by arranging a mesh spacer between adjacent filtration units even when using a material made of woven fabric or nonwoven fabric subjected to non-flammable or flame retardant treatment As a result, it is possible to secure a sufficient amount of processing air, and as a result, it is possible to obtain a high collection amount and dust collection efficiency, and at the same time to reduce the size of the dust removing device. .

  Moreover, according to the dust removal apparatus of the present invention, the filter medium of each filtration unit is formed of non-combustible or flame-retardant fibers, or is either a woven fabric or a non-woven fabric that has been subjected to a treatment incombustible treatment or a flame-retardant treatment. Therefore, the fire resistance and heat resistance are also very high, so the exhaust gas of automobiles, welding or fusing fumes in welding or fusing operations (metal vapor generated in welding operations etc. agglomerate into fine particles) It is also possible to collect particulate pollutants and dust contained in high-temperature air, etc., and can also be used to clean such air.

  According to the dust removing device of the present invention, since the spacer is also disposed between the filter medium of the filtration unit disposed adjacent to the inner wall of the casing in the first chamber and the inner wall of the casing, the filtration unit adjacent to the casing. As for the filter medium, the ventilation surface of the filter medium is not blocked, and as a result, the amount of collection and the dust collection efficiency in the dust removing device can be further improved.

According to the dust removing device of the present invention, since the contact between the filter media of the adjacent filter units is prevented by the mesh spacer, the first filter media layer having a thickness of 20.0 mm to 60.0 mm, Since the characteristics of the filter medium which is laminated on the surface of one filter medium layer and is composed of the second filter medium layer having a thickness of 5.0 mm to 25.0 mm can be sufficiently exhibited, it is extremely small while being small. It is possible to obtain a dust removing device having a collection amount and a high collection efficiency. In addition, the effect of such a dust removing device is as follows. (Claim 4) The first filter medium layer and the second filter medium layer are either glass fiber, rock wool, and woven or non-woven fabric that has been subjected to non-flammability treatment or flame retardant treatment It can be remarkably exhibited by comprising. Furthermore, the above-described effect of the dust removing device, the basis weight of the first filter layer in the range of ^{15kg / m 3 ~30kg / m 3} , a basis weight of the second filter layer in the range of 40kg ^{/ m 3} ~90kg ^/ m 3 This is even more effective.

  Hereinafter, the dust removing device according to the present invention will be described in more detail with reference to preferred embodiments shown in the accompanying drawings. FIG. 1 is a cross-sectional view showing a dust removing device 10 according to an embodiment of the present invention, FIG. 2 is a perspective view showing a filtration unit 20 installed in a casing 11 of the dust removing device 10, and FIG. It is a fragmentary sectional view which expands and shows a part of filter medium 30 which comprises. In the dust removing apparatus 10 according to this embodiment, four filtration units 20 are set in the casing 11. The casing 11 is composed of a casing body 11a having an upper opening as shown in FIG. 4 and a cover 11b (see FIG. 1) which is tightly covered with the opening and sealed. The casing body 11a is composed of a bottom wall 12 and four side walls 13 and has a box shape in which the adjacent side walls 13 and the bottom wall 12 and the side walls 13 are orthogonal to each other. A storage chamber 14 having a predetermined width is formed inside the casing body 11a.

  A shelf plate 15 having a shape matching the planar shape is installed in the storage chamber 14 with its end edges fixed to the inner surfaces of the side walls 13 of the casing body 11a by welding or the like. The first chamber 14a is lower than the shelf 15 and the second chamber 14b is higher than the shelf 15. In the casing 11, a connecting pipe portion 16 communicating with the first chamber 14 a is formed on the bottom wall 12 of the casing body 11 a, and a connecting pipe portion communicating with the second chamber 14 b is also formed on the cover 11 b. 17 is formed. The shelf plate 15 is formed with an opening 15a for attaching a filtration unit 20 to be described later. The number of openings 15a corresponds to the number of filtration units 20 arranged inside the casing 11, and in this embodiment, the dust removing device 10 including four filtration units 20 is taken as an example. Four openings 15a are formed side by side. The shape and size of these openings 15a will be described later.

  Next, the structure of the filtration unit 20 will be described with reference to FIG. The filtration unit 20 includes a support frame body 23 formed by attaching a suspension plate 22 to a support frame body 21, and a filter medium 30 attached to the support frame body 21 of the support frame body 23. The support frame main body 21 has a rectangular opening 24 formed in an upper portion thereof, and a box shape in which an arbitrary cut surface parallel to the opening surface of the opening 24 has a rectangular shape substantially the same size as the opening 24. Therefore, the support frame main body 21 includes four flat wall surfaces 25a, 25b, 25c, and 25d in the circumferential direction, and also includes a flat wall surface (bottom wall) 25e at the bottom portion facing the opening 24. ing. As apparent from FIG. 2, the support frame main body 21 has an area of a pair of opposing wall surfaces 25a and 25b larger than that of the other pair of opposing wall surfaces 25c and 25d, and the opening 24 and the bottom wall 25e. It is a vertically long rectangular parallelepiped with a long interval.

  The suspension plate 22 is formed of a plate-like substrate having a predetermined thickness and rigidity. The suspension plate 22 is similar to the shape of the opening 24 in the support frame body 21 and has a rectangular shape larger than the opening 24. The suspension plate 22 includes an opening 22 a at the center thereof, and the opening 22 a is formed in the same shape and size as the opening 24 of the support frame main body 21. The suspension plate 22 includes a flange-shaped upper surrounding frame 22b formed on the lower surface thereof. The upper surrounding frame 22b is formed so as to surround the opening 22a outside a predetermined distance from the inner edge of the opening 22a. The suspension plate 22 abuts the back surface of the suspension plate 22 against the end surface of the opening 24 in the support frame main body 21 so that the opening 22a is aligned with the opening 24 of the support frame main body 21, and supports the suspension plate 22 by means such as welding. It is fixed to the frame body 21.

  The upper surrounding frame 22b formed on the lower surface of the suspension plate 22 is formed with a hanging length that substantially faces a fixing portion 26 of the support frame main body 21, which will be described later, when the suspension plate 22 is fixed to the support frame main body 21. ing. The suspension plate 22 is provided with two U-shaped handles 22c on the surface thereof, and these two handles 22c are attached in parallel in the vicinity of both ends in the longitudinal direction of the substrate forming the suspension plate 22. Further, the suspension plate 22 includes a plurality of screw holes 22d formed on the surface thereof, and these screw holes 22d are along side edges 22e and 22f extending in the longitudinal direction of the substrate forming the suspension plate 22 and to each other. There is an interval.

  By the way, the surrounding wall surfaces 25a to 25d in the support frame main body 21 include a fixing portion 26 for holding a filter medium, in which the surrounding wall surface portion in the vicinity of the opening 24 that is the upper portion of the support frame main body 21 is formed of a flat steel plate. The portion excluding the fixing portion 26 is formed by a part of the ventilation wall surface portion 27 formed of a relatively rigid wire mesh or the like. The fixing part 26 for holding the filter medium is a part that literally fixes a mouth part 30a of the filter medium 30 described later. The ventilation wall surface portion 27 is an air passage portion through which air passes from the internal space portion 21a of the support frame main body 21 to the outside or in the opposite direction. In addition, as above-mentioned, the ventilation wall surface part 27 in the filtration unit 20 which concerns on this embodiment is comprised by the part except the fixing | fixed part 26 in surrounding wall surface 25a-25d, and the bottom wall 25e. Thus, the bottom wall 25e of the support frame main body 21 can also be included in the ventilation wall surface portion 27 by forming it with a mesh-like material such as a wire mesh. However, the bottom wall 25e is a flat surface steel plate as will be described later. Since it may form, it may not be contained in the component of the ventilation wall surface part 27. FIG. In addition, if the bottom wall 25e is formed of a steel plate, the rigidity of the ventilation wall surface portion 27 formed of a mesh-like material such as a wire mesh in the surrounding wall surfaces 25a to 25d can be further increased. The ventilation wall surface portion 27 may be a lattice formed of a thin steel rod in addition to a wire mesh, or may be formed of a porous plate in which an infinite number of holes are formed in a steel plate.

  The filter medium 30 attached to the support frame main body 21 is a non-combustible fiber such as metal fiber, glass fiber, or rock wool, or non-combustible treatment or flame retardant, as shown in FIG. The first filter medium layer 31 formed of a woven or nonwoven fabric subjected to a heat treatment, and a non-flammable fiber such as glass fiber or rock wool, or a woven or nonwoven fabric subjected to a non-flammable treatment or a flame retardant treatment. The second filter medium layer 32 is formed and laminated on the surface of the first filter medium layer 31. The first filter medium layer 31 has a thickness in the range of 20.0 mm to 60.0 mm. When the thickness of the first filter medium layer 31 is 20.0 mm or less, the trapped amount of contaminating particles and the like is reduced, and when it exceeds 60.0 mm, the trapped amount is improved but is exerted on the first filter medium layer 31. The surface pressure becomes too high and the processing air volume decreases, and the entire thickness of the filter medium 30 becomes too thick, resulting in an increase in size. For this reason, the thickness of the first filter medium layer 31 is preferably about 40 mm. The second filter medium layer 32 has a thickness in the range of 5.0 mm to 25.0 mm. When the thickness of the second filter medium layer 32 is 5.0 mm or less, the trapping amount of contaminating particles and the like is reduced. When the thickness exceeds 25.0 mm, the trapping amount is improved but is exerted on the second filter medium layer 32. The surface pressure becomes too high and the processing air volume decreases, and the entire thickness of the filter medium 30 becomes too thick, resulting in an increase in size. For this reason, the thickness of the second filter medium layer 32 is preferably about 15 mm.

The second filter medium layer 32 is formed in a dense structure as compared with the first filter medium layer 31. Specifically, the basis weight of the first filter layer 31 ^is in the range of ^{15kg / m 3 ~30kg / m 3} . If the basis weight of the first filter medium layer 31 is 15 kg / m ³ or less, the collected amount of contaminating particles and the like will decrease, and if it exceeds 30 kg / m ³ , it will reach the first filter medium layer 31 even if the collected amount is improved. The surface pressure generated becomes too high, and the processing air volume decreases. The basis weight of the second filter layer 32 ^is in the range of ^{40kg / m 3 ~90kg / m 3} . If the basis weight of the second filter medium layer 32 is 40 kg / m ³ or less, the collected amount of contaminating particles and the like will decrease, and if it exceeds 90 kg / m ³ , the collected amount will be improved but will reach the second filter medium layer 32. The surface pressure generated becomes too high, and the processing air volume decreases. Therefore, the basis weight of the first filter medium layer 31 is preferably around 24 kg / m ³ , and the basis weight of the second filter medium layer 32 is preferably around 80 kg / m ³ .

  As described above, the second filter medium layer 32 overlapping the surface of the first filter medium layer 31 is formed with a dense structure as compared with the first filter medium layer 31. Such a filter medium 30 is formed by independently forming a first filter medium layer 31 and a second filter medium layer 32 as shown in FIG. 5 and overlapping each other or as shown in FIG. The filter medium layer 31 can be used as a base material, and a non-combustible fiber such as metal fiber, glass fiber, or rock wool is sprayed on the surface, and the second filter medium layer 32 is deposited.

  Such a filter medium 30 is used by being attached to the support frame main body 21. As an example of the attachment method, the filter medium 30 is formed in a bag shape so that the first filter medium layer 31 is an inner layer and the second filter medium layer 32 is an outer layer as is apparent from FIG. The support frame body 21 in the support frame body 23 is enclosed so that the bottom side of the support frame body 21 described above is inserted therein. As a means for fixing the bag-shaped filter medium 30 to the support frame body 23, as shown in FIG. 1, when the bag-shaped filter medium 30 is put on the support frame main body 21 as described above, the mouth portion 30a of the filter medium 30 is Then, it is pushed into the space between the upper surrounding frame 22b and the fixed plate 26. Next, the wedge-shaped pressing member 28 is press-fitted into the interval portion along the outer peripheral surface of the mouth portion 30 a of the bag-shaped filter medium 30, whereby the mouth portion 30 a of the bag-shaped filter medium 30 is fixed to the fixing portion of the support frame main body 21 by the wedge-shaped pressing member 28. 26 is attached in pressure contact.

  FIG. 7A shows another means for fixing the bag-shaped filter medium 30 to the support frame 23. In another means for fixing the bag-shaped filter medium 30 to the support frame body 23, the bag-shaped filter medium 30 is attached to the support frame body 23 using the suspension plate 122 without the upper surrounding frame as a member constituting the support frame body 23. . Specifically, the support frame main body 21 is relatively inserted into the bag-shaped filter medium 30 from the bottom side to cover the peripheral wall surfaces 15a to 15d of the support frame main body 21, and the vicinity of the mouth 30a of the filter medium 30 is the support frame. It is positioned at the fixing portion 26 of the main body 21. Next, a belt-like pressing plate 123 is applied from the outside of the mouth portion 30 a of the bag-shaped filter medium 30 facing the surface of the fixing portion 26, and the pressing plate 123 is fixed to the steel plate of the fixing portion 26 with screws 124. As a result, the vicinity of the mouth portion 30a of the bag-shaped filter medium 30 is strongly pressed by the holding plate 123 and the fixed portion 26 over the entire periphery, and as a result, the filter medium 30 is in close contact with the outer peripheral surface of the fixed portion 26. It can be attached to the support frame main body 21 in a state.

  The above-described filter medium 30 is formed in a bag shape, and the support frame main body 21 is relatively inserted into the inside from the mouth portion 30a so as to be attached to the support frame body 23. Then, it is not necessary to form the filter medium 30 in a bag shape, and the filter medium 30 may be formed in a single sheet shape and attached so as to be wound around the peripheral wall surfaces 25 a to 25 d of the support frame main body 21. FIG. 7B shows a state in which such a sheet-like filter medium 30 is attached to the support frame main body 21. As shown in FIG. 1, the support frame main body 21 shown in FIG. 7 (b) has a flange-like upper enclosure frame 22b standing on the lower surface of the suspension plate 22 and at the same time also on the bottom side of the support frame main body 21. The lower enclosure frame 29 is provided. More specifically, when the filter medium 30 is in the form of a sheet, the bottom wall 25e of the support frame body 21 cannot be covered like the filter medium 30 formed in a bag shape. It is closed so that the circulation of is impossible. At that time, the peripheral edge portion of the bottom wall 25e formed of a steel plate or the like protrudes beyond the edge of the surrounding wall surfaces 25a to 25d, and the lower enclosure frame 29 at the end is the same as the upper enclosure frame 22b. Established.

  And the sheet-like filter medium 30 is wound around the surrounding wall surfaces 25a-25d of the support frame main body 21 containing the ventilation | gas_flowing wall surface part 27 so that the 1st filter medium layer 31 may be located inside. The upper end portion 30b of the filter medium 30 wound around the surrounding wall surfaces 15a to 15d is pushed into the space between the upper enclosure frame 22b and the fixing plate 26, and the lower end portion 30c is inserted into the lower enclosure frame 29 and the surrounding wall surfaces 25a to 25a. It is pushed into the space between 25d. Next, the wedge-shaped pressing members 28 are press-fitted into the respective spacing portions along the outer peripheral surfaces of the upper and lower end portions 30b, 30c of the filter medium 30, whereby the upper and lower ends 30b, 30c of the filter medium 30 are supported by the wedge-shaped pressing member 28. 21 is attached in pressure contact with the fixed portion 26 and the surrounding wall surfaces 25a to 25d. When the sheet-like filter medium 30 is wound around the peripheral wall surfaces 25a to 25d of the support frame main body 21, both ends in the circumferential direction are brought into close contact with each other so as not to form a gap, and are connected by an appropriate means.

  Next, the attachment method when attaching the filtration unit 20 mentioned above in the casing 11 and its structure are demonstrated. As described above, four openings 15a are formed in the shelf board 15 for attaching the filtration unit 20, and these openings 15a have a size and a shape into which the support frame main body 21 of the filtration unit 20 can be inserted. Yes. Each filtration unit 20 has a handle 22 c attached to the upper part of the suspension plate 22, inserts the support frame main body 21 from each opening 15 a of the shelf plate 15, and places the periphery of the suspension plate 22 on the shelf plate 15. It is placed on and suspended from the shelf board 15. Thereby, most of the filtration unit 20 is located in the first chamber 14 a in the casing 11. The suspension plate 22 is screwed to the shelf plate 15 using screw holes 22d formed therein, and the filtration unit 20 is firmly fixed to the shelf plate 15. When the suspension plate 22 is fixed on the shelf plate 15, it is also preferable that an annular packing or the like is interposed between them so that there is no gap between the mating surfaces of the suspension plate 22 and the shelf plate 15. .

  As described above, the filter medium 30 attached to the support frame main body 21 of the filtration unit 20 is a non-combustible fiber such as metal fiber, glass fiber, or rock wool, or a woven or non-woven fabric subjected to a non-combustible treatment or a flame-retardant treatment. The first filter medium layer 31 is formed of a non-combustible fiber such as glass fiber or rock wool, or a woven or non-woven fabric subjected to a non-combustible process or a flame-retardant process. The first filter medium layer 31 has a thickness in the range of 20.0 mm to 60.0 mm, and the second filter medium layer 32 has a thickness thereof. Is in the range of 5.0 mm to 25.0 mm. Therefore, the thickness of the entire filter medium 30 is in the range of 25.0 to 85.0 mm. Therefore, when the plurality of filtration units 20 are suspended on the shelf board 15, if the filter media 30 of the adjacent filtration units 20 come into contact with each other, aeration is inhibited at the contact surface portion, and a predetermined ventilation rate cannot be secured. As a result, the dust removal efficiency is reduced. However, if the filter units 20 are spaced apart from each other so that the filter media 30 of adjacent filter units 20 do not come into contact with each other, the dust remover 10 itself increases in size because the filter media 30 is thick as described above. Even if the filter mediums 30 of the adjacent filtration units 20 are spaced apart from each other at the time of installation of the filtration unit 20, the air sucked into the casing of the dust removing device 10 is not absorbed by the support frame body 21. When flowing from the inner side toward the outer side, a surface pressure is applied to the inner side of the filter medium 30, and the filter medium 30 swells to the outer side and comes into contact with the adjacent filter medium 30.

  Therefore, in the dust removing apparatus 10 of this embodiment, the spacer 18 formed of a mesh-like material such as a wire net is disposed between the filtration units 20. The spacer 18 may be a lattice formed of a thin steel rod in addition to a wire mesh, like the ventilation surface of the support frame main body 21, that is, the ventilation wall surface portion 27, and a porous plate having innumerable holes formed in a steel plate. It can also be formed. In addition, the spacer 18 has a rectangular parallelepiped shape, that is, a box shape having an open top including four peripheral wall surfaces and a bottom surface, like the support frame main body 21. Such a box-shaped spacer 18 is attached so that its upper open end is suspended from the shelf 15 by being fixed to the lower surface of the crosspiece 15b between the openings 15a of the shelf 15 with screws or welding. It has been. The spacer 18 is also attached to the lower surface of a crosspiece 15b between the outermost opening 15a formed in the shelf 15 and the wall surface 13 of the casing body 11 in the arrangement direction of the opening 15a.

  As a result, as described above, each filtration unit 20 inserts the support frame main body 21 from each opening 15a of the shelf board 15 and places the periphery of the suspension board 22 on the shelf board 15 so as to be suspended on the shelf board 15. Then, the filter media 30 of the adjacent filtration units 20 are forcibly separated by the air-permeable spacers 18 so that mutual contact is prevented. Similarly, the filter medium 30 of the filtration unit 20 in which the support frame main body 21 is inserted into the outermost opening 15 a of the shelf plate 15 and suspended from the shelf plate 15 is also forced from the inner wall surface of the casing 11 by the air-permeable spacer 18. Therefore, contact with the inner wall surface of the casing 11 is prevented. As a result, the filter medium 30 in the plurality of filtration units 20 attached to the shelf board 15 has a structure in which the spacer 18 can be ventilated such as a mesh-like material, so that the portion in contact with the spacer 18 can also be ventilated. Become.

  In addition, when air flows from the inside to the outside of the support frame main body 21, the filter medium 30 tends to swell outward due to surface pressure, and since this bulge is also blocked by the spacer 18, Since the filter medium 30 is not in contact with the filter medium 30 and the filter medium 30 is not in contact with the inner wall of the casing 11 in the outer filter unit 21, a sufficient ventilation surface can be secured. As described above, in this dust removing device 10, even if a plurality of filtration units 20 are attached in the casing 11 in close proximity to each other, it is possible to ensure ventilation on all outer surfaces of the filter medium 30. Can be made small, and at the same time, the processing air volume can be increased. In this embodiment, the spacers 18 are formed in a box shape with a mesh-like material such as a wire mesh. However, the spacers 18 have a predetermined shape so that they are not easily deformed even when pressed by the filter medium 30. This is to obtain rigidity. Therefore, in the dust removing apparatus 10 of the present invention, the spacer 18 does not have to be box-shaped, and for example, two rigid plate-like bodies in which an infinite number of holes are formed are used, and they are spaced at a predetermined interval. It may be fixed and hung on the crosspiece 15b of the shelf 15 as described above, or it may be formed by arranging a large number of thin rods in a row and fixing their upper ends to the crosspiece 15b of the shelf 15 and suspending them. It can be easily understood that the same effect can be obtained even if it is configured as described above.

  Thus, when each filtration unit 20 is set in the storage chamber 14 of the casing main body 11a, the first chamber 14a and the second chamber 14b of the casing main body 11a are connected to the bag-shaped filter medium 30 attached to the support frame main body 21. Communicate only via. When the filtration unit 20 is set in the casing main body 11a, the cover 11b is put on the open portion of the casing main body 11a, and the second chamber 14b of the casing 11 is thereby sealed.

  According to the dust removing apparatus 10 according to this embodiment, exhaust gas such as an automobile containing particulate pollutants, air containing dust and dust (hereinafter simply referred to as contaminated air) is indicated by an arrow 40 in FIG. Into the second chamber 14 b of the casing 11 from the pipe line portion 17. The contaminated air introduced into the second chamber 14 b of the casing 11 enters the internal space 21 a from the opening 22 a in the suspension plate 22 of each filtration unit 20 and the opening 24 of the support frame main body 21, passes through the filter medium 30 and passes through the filter medium 30. It flows into one chamber 14a. At that time, particulate pollutants, dust, or dust in the contaminated air are sequentially collected by the inner first filter medium layer 31 and the outer second filter medium layer 32 forming the filter medium 30, so that the first The chamber 14a is filled with these particulate contaminants, dust, or clean air from which dust has been removed. Next, the purified air is discharged from the first chamber 14 a to the atmosphere through the pipe line portion 16 as indicated by an arrow 41. The introduction of contaminated air into the casing 11 can be performed by connecting an air supply pump (not shown) to either of the pipe sections 16 and 17.

  As described above, the dust removing device 10 can be installed at an automobile inspection site, an automobile maintenance shop, a sawmill, an ironworks, or the like, and used as an element in a ventilation system for the entire work space. However, as shown in FIG. 8, the dust removal apparatus 10 can be used as an exhaust gas purification system 50 that directly sucks and purifies exhaust gas emitted from the exhaust pipe of a vehicle at an automobile inspection site, an automobile maintenance shop, or the like. Can also be configured. That is, the exhaust gas purification system 50 has a pipe line formed on the cover 11b of the dust removing device 10 with the other end of the suction hose 52 having a trumpet-shaped collection receiving port 51 attached to one end (tip) in order to suck contaminated air. On the other hand, one end of a supply hose 53 that guides purified air to a proper place is connected to a pipe line portion 16 formed in the casing body 11a.

  When the exhaust gas of the automobile is inspected or the engine of the automobile is serviced, the collection receiving port 51 positioned at the tip of the suction hose 52 is positioned at the outlet of the exhaust pipe 55 in the inspection or maintenance vehicle 54, and the exhaust pipe The exhaust gas emitted from 55 is directly sucked by the suction hose 52 and taken into the dust removing device 10, the particulate pollutant is collected by the filter medium 30, and the purified air is discharged from the feed hose 53 into the field. In the exhaust gas purification system 50 shown in FIG. 8, a feed pump for sucking exhaust gas discharged from the exhaust pipe 55 of the inspection or maintenance vehicle 54 into the dust removing device 10, purifying it, and releasing it. Although not shown, in reality, a feed pump is disposed between one of the two pipe sections 16 and 17 in the dust removing apparatus 10 and the suction hose 52 or the feed hose 53. In this way, if the exhaust gas emitted from the exhaust pipe for each inspection or maintenance vehicle is purified by the dust removing device 10, the contaminated air does not drift in the field at all, and the work environment in the field can be further prevented from deteriorating.

As the dust removing device 10, the one having the structure shown in FIG. 1 was used. That is, four rows of filtration units 20 were installed inside the casing 11. The filter medium 30 has four total surface areas of 2 m ² and air surface speed of 2 m / s.
The first filter medium layer 31 in the filter medium 30 is made of glass wool, has a thickness of 25 mm, and a basis weight of 32 kg / m ³ . The second filter medium layer 32 in the filter medium 30 is made of rock wool, has a thickness of 25.0 mm, and a basis weight of 40 kg / m ³ .
As shown in FIG. 2, the filtration unit 20 constituting the dust removing device 10 covers the mesh-like peripheral wall surfaces 25 a to 25 d and the mesh-like bottom wall 25 e in the box-shaped support frame main body 21 with a bag-like filter medium 30. The mouth portion 30 a was fixed to the fixing portion 16 of the support frame main body 11 with a wedge-shaped pressing member 28. In the used dust removing device 10, the contaminated air is introduced into the casing 11 from the pipe line portion 17 in the cover 11 b of the casing 11, and passes through the filter medium 30 from the inside of the support frame main body 21 in the same manner as the dust removing device 10 shown in FIG. 1. The purified and purified air is discharged from the pipe line part 16 of the casing body 11a to the outside. Accordingly, the bag-shaped filter medium 30 attached to the support frame main body 21 is formed such that the first filter medium layer 31 is positioned on the inner side and the second filter medium layer 32 is positioned on the outer side.

  When exhaust gas from a 2-ton diesel truck that does not have an exhaust gas purification device is introduced into the dust removal device 10 together with the surrounding workplace air and the purification capability is examined, the efficiency of the black smoke in the exhaust gas is 95% or more. I was able to collect it. Further, when the dust removing device 10 was used at an automobile vehicle inspection site, the vehicle inspection could be performed about 700 times or more before the filter medium 30 had to be replaced.

  In the dust removing apparatus 10 of the above-described embodiment, the filter medium 30 is attached to the ventilation wall surface portion 27 of the support frame main body 21, and the contaminated air is allowed to pass from the inner space portion 21 a of the support frame main body 21 to the outside, so In this case, dust or particulate contaminants are collected, but contaminated air is introduced into the dust removing device 10 from the pipe line portion 16, and is passed from the outside of the support frame body 21 through the ventilation wall surface portion 27. Dust, dust, or particulate contaminants contained in the contaminated air may be collected by the filter medium 30 through the internal space 21a. In that case, the filter medium 30 is configured such that the first filter medium layer 31 is located on the upstream side of the contaminated air. However, like the dust removing device 10 of the above-described embodiment, the contaminated air is passed from the inner space portion 21a of the support frame main body 21 to the outside through the vent wall surface portion 27, and the dust contained in the contaminated air with the filter medium 30; If dust or particulate contaminants are collected, the amount collected in the first filter medium layer 31 located inside the filter medium 30 is large, so that it was collected when the filter medium 30 was replaced after a predetermined period of time. There is an advantage that dust, dust, or particulate pollutants are hardly scattered around.

  As described above, according to the dust removing device of the present invention, the filter medium constituting the plurality of filtration units installed in the casing has a mat-like thickness that is excellent in dust collection efficiency. , Even when using non-flammable or flame-retardant fibers, or a material made of non-flammable or non-flammable woven or non-woven fabric, an air-permeable spacer is placed between adjacent filtration units Therefore, the air flow surface of the filter medium in each filtration unit is not blocked, and thereby a sufficient amount of processing air can be ensured. As a result, a high collection amount and dust collection efficiency can be obtained, and at the same time a dust removal device Can be miniaturized.

  In addition, according to the dust removing device of the present invention, the filter medium is made of non-flammable or flame-retardant fiber, or a woven fabric in which the non-flammable or flame-retardant treatment is applied, even though the dust removing device is downsized. Alternatively, it is made of non-woven fabric, and can use a mat-like filter medium with excellent dust collection efficiency, so it has a 0.3 micron particle collection performance, and as a result, dust containing air dust, pollen, etc. Or, black smoke of exhaust gas containing particulate pollutants can be efficiently collected, and the amount of the collected smoke is also large. Further, in the dust removing apparatus of the present invention, since the amount of collected dust such as dust in the air, dust including pollen, or black smoke of exhaust gas containing particulate pollutants is large, frequent replacement work of the filter media or There is no need for management, and labor required for replacement work and management can be greatly reduced compared to conventional filtration units. In addition, since the filter medium is fire-proof and heat-resistant, this filter unit is connected to the exhaust pipe outlet of an automobile with a heat-resistant hose, for example, and exhaust gas having a high temperature coming out of the exhaust pipe is drawn into the filter unit. It can also be purified directly.

Sectional drawing which shows schematically the dust removal apparatus which concerns on one Embodiment of this invention. The perspective view which shows roughly one filtration unit which comprises the dust removal apparatus of FIG. Sectional drawing which expands and shows the filter medium which comprises a filtration unit partially. The perspective view which shows partially the casing main body of the casing which comprises a dust removal apparatus. The perspective view which shows partially an example of the formation method of a filter medium. The perspective view which shows another example of the formation method of a filter medium partially. Sectional drawing which shows the filtration unit of the state which attached the bag-shaped filter medium and the sheet-like filter medium to the support frame main body, respectively. FIG. 3 is a schematic configuration explanatory diagram of an exhaust gas purification system that directly sucks exhaust gas emitted from an inspection or maintenance vehicle to prevent environmental deterioration in the site.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Dust remover 11 Casing 14 Storage chamber 14a 1st chamber 14b 2nd chamber 15 Shelf board 15a Opening 18 Spacer 20 Filtration unit 21 Support frame main body 22 Suspension plate 23 Support frame body 24 Opening 25a-25d Perimeter wall surface 25e Bottom wall surface 26 Fixing Part 27 Aeration wall part 30 Filter medium 31 First filter medium layer 32 Second filter medium layer

Claims (5)

In a dust removal device that collects and cleans particulate pollutants, dust, and dust contained in the air,
A casing having an interior partitioned into a first chamber and a second chamber, a plurality of filtration units disposed adjacent to each other in the first chamber of the casing, and at least between the adjacent filtration units With spacers installed in the
Each of the filtration units has at least a ventilated and rigid wall surface portion, and a box-shaped support frame body having a space portion surrounded by the wall surface portion, and the support frame body It consists of a filter medium attached to the wall surface,
The internal space of each filtration unit communicates with the second chamber via an opening formed in the support frame;
The filter medium is formed of non-combustible or flame-retardant fibers and has a mat shape having a thickness of 25.0 mm to 85.0 mm,
The spacer is disposed between the filter medium in one of the filtration units disposed in the first chamber of the casing and the filter medium in the other filtration unit adjacent to the spacer, and is formed in a structure that allows ventilation. A dust removing device characterized by that.   The said spacer is arrange | positioned also in between in order to avoid the contact with the said filter medium of the said filtration unit arrange | positioned adjacent to the inner wall of the said casing in the said 1st chamber, and the said inner wall of the said casing. Dust removal equipment.   The filter medium of each filtration unit is composed of a first filter medium layer and a second filter medium layer laminated on the surface of the first filter medium layer, and the first filter medium layer is 20.0 mm to 60.0 mm. The second filter medium layer has a thickness of 5.0 mm to 25.0 mm, and the second filter medium layer is formed in a denser structure than the first filter medium layer. The dust removing apparatus according to 1 or 2.   The said 1st filter-medium layer and the said 2nd filter-medium layer are any one of the Claims 1-3 comprised by the glass fiber, rock wool, and the woven fabric or nonwoven fabric which performed the nonflammable process or the flame-retardant process. The dust removing device described in 1. Said first filter layer has a basis weight in the range of ^{15kg / m 3 ~30kg / m 3} , the second filter layer is claim 3 or 4 having a basis weight in the range of 40kg ^{/ m 3} ~90kg ^/ m 3 The dust removing device described in 1.

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