JP5841718B2 - Purification unit and purification structure using the purification unit - Google Patents

Description

  The present invention is used as, for example, a blindfold in a sidewalk or a parking lot, and pollutants such as dust containing nitrogen oxides, sulfur oxides, volatile hydrocarbons, and suspended particulate matter contained in a fluid to be purified such as air The present invention relates to a purification unit using a catalyst fiber effective for removing water, and a purification structure using the purification unit.

  Nitrogen oxides and sulfur oxides contained in fluids to be purified such as air flowing through ventilation passages in environments with significant air pollution such as roadside roads where automobile traffic is high and industrial areas where power plants and factories are densely packed There has been proposed a purification unit using catalyst fibers that are effective in removing contaminants such as volatile hydrocarbons and dust containing suspended particulate matter (see, for example, Patent Document 1 below).

  Specifically, the purification unit is configured to include activated carbon fibers, is processed into a pleat shape, and has an activated carbon fiber molded body having ventilation between the front and back of the pleat, and disposed on the pleat surface side of the activated carbon fiber molded body. The surface plate is formed with ventilation holes that allow ventilation between the front and back surfaces, and purifies the fluid to be purified that enters the ventilation space along the pleat crease through the ventilation holes of the surface plate. It is formed as a purification space.

  This purification unit (or a purification structure configured using the purification unit) has a purification function for removing contaminants such as nitrogen oxides, sulfur oxides, volatile hydrocarbons, and dust containing suspended particulate matter. Yes.

JP 2009-101348 A

  The conventional purification unit has a purification function for removing contaminants such as nitrogen oxides, sulfur oxides, volatile hydrocarbons, and dust containing suspended particulate matter. The purification space is merely an area for purifying the purification target fluid entering from the ventilation holes provided in the surface plate.

  However, this type of purification unit is installed outdoors as described above. That is, it is exposed to a fluid to be purified such as air and also exposed to rainwater. And in the said purification | cleaning unit, there was room for examination about the purification | cleaning by the relationship with moisture, such as rain water which penetrate | invaded in the purification unit.

  In view of the above problems, the present invention provides a purification unit that is extremely excellent in removing pollutants such as dust containing nitrogen oxides, sulfur oxides, volatile hydrocarbons, and suspended particulate matter, and a purification structure using the same. Objective.

The present invention is a purification unit for removing pollutants contained in air, and an activated carbon fiber molded body that includes activated carbon fibers and has ventilation between the front and back is provided in the purification unit main body. A plurality of shape retention members are provided for retaining the activated carbon fiber molded body in a pleated shape, and are disposed on the surface side of the activated carbon fiber molded body to allow ventilation between the front and back surfaces. It has a surface plate with ventilation holes formed on the plate surface, and a sound absorbing material built in the purification unit body is disposed on the back side of the shape-retaining member, and peaks and valleys that are the height of the activated carbon fiber molded body The activated carbon fiber molded body is held in a pleated shape by the shape-retaining member, and the purification unit is set so that the distance to the portion is set larger than the distance from the surface of the sound absorbing material to the back surface of the front plate In the state of being held by the main body. Then, the crest portion on the surface plate side of the activated carbon fiber molded body is pressed to the back surface side by the surface plate, and the area where the fiber density of the activated carbon fiber is high and the area where the fiber density is low are the spreading direction of the activated carbon fiber molded body. It is characterized by being present alternately.

In the above configuration, the activated carbon fiber molded body is formed in a pleated shape that repeats the crest and trough by the shape-retaining member, and the crest on the surface plate side of the activated carbon fiber molded body is on the back side by the surface plate. Since it is pressed, on the back side of the front plate, the space area formed by the two peaks and the valleys of the activated carbon fiber molded body is partitioned from the adjacent space area. The purification target fluid that has entered the purification unit main body through the ventilation holes of the face plate easily stays in the space region, and the time for which the purification target fluid staying in the space region is in contact with the activated carbon fiber molded body is increased accordingly. Therefore, contaminants are easily removed. Further, according to this configuration, the purification unit is also used as a noise reduction unit.

  Here, a region where the fiber density of the activated carbon fiber is high and a region where the fiber density is low are alternately present in the spreading direction of the activated carbon fiber molded body. That is, the region where the fiber density is high and the region where the fiber density is low are vertically and horizontally. Or an activated carbon fiber molded body formed into a sheet shape before being formed into a pleated shape by a shape-retaining member, including a vertical direction and a direction inclined with respect to the left-right direction. It is a concept that includes.

  Moreover, the peak part by the side of the surface plate of an activated carbon fiber molding is pressed to the back side by the surface board, and the area | region where the fiber density of an activated carbon fiber is high and the area | region where it is low are alternately with the spreading direction of an activated carbon fiber molding. Since water such as rainwater that has entered the purification unit main body through the ventilation holes of the surface plate is absorbed by the activated carbon fiber molded body, it slowly falls in the region where the fiber density is high, and the fiber density is low. In the region, since it descends more rapidly than in the high region, the ability to purify the activated carbon fiber molded body with moisture is improved by the amount provided for the region where the fiber density is high.

  In this invention, the structure where the area | region where the fiber density of activated carbon fiber is high and the area | region where it is low exists alternately can be employ | adopted. According to this configuration, since the average flow rate of the water descending the activated carbon fiber molded body is lower than that of the activated carbon fiber molded body formed only in the region where the fiber density is low, the activated carbon fiber molded body is increased by moisture accordingly. The ability to purify is improved.

  In the purification unit of the present invention, a configuration in which the shape retaining member is provided only on the back surface side of the activated carbon fiber molded body and has air permeability can be employed. According to this configuration, by providing the shape-retaining member only on the back side of the activated carbon fiber molded body, the manufacturing cost can be reduced compared to the case of providing on both sides, and the activated carbon fiber molded body is retained. This process is also facilitated. Moreover, according to the shape-retaining member imparted with air permeability, even if the shape-retaining member is in contact with the activated carbon fiber molded body, the purification target fluid extends between the front and back surfaces of the activated carbon fiber molded body. It is possible to pass through.

  In the purification unit of the present invention, it is possible to adopt a configuration in which the ventilation holes formed in the surface plate are formed at least in a region facing the valley portion of the activated carbon fiber molded body. According to this configuration, the purification target fluid easily reaches the valley.

  In the purification unit of the present invention, it is possible to employ a configuration in which a waterproof film for preventing water from entering the sound absorbing material is provided on the surface of the sound absorbing material. According to this configuration, since the sound absorbing material is unlikely to absorb moisture such as rainwater, the sound absorbing performance of the sound absorbing material is ensured.

  The purification structure of the present invention is characterized in that the purification units described in any one of the above are combined in adjacent directions in at least one of the vertical direction and the horizontal direction. By combining the purification units in this way, it is possible to obtain a purification structure adapted to the place where the purification unit is installed.

  According to the purification unit of the present invention and the purification structure using the same, the activated carbon fiber molded body is formed into a pleated shape that repeats the crest and trough by the shape-retaining member. Since the crests on the surface plate side are pressed to the back side by the surface plate, the valleys of the pleats are partitioned, so the fluid to be purified that has entered the purification unit main body from the ventilation holes of the surface plate is the trough. Since the fluid to be purified that stays in the part and stays in the valley part is in contact with the activated carbon fiber molded body, the pollutant can be effectively removed.

  In addition, since the crests on the surface plate side of the activated carbon fiber molded body are pressed to the back surface side by the surface plate, regions with high and low fiber density of the activated carbon fibers are alternately present. Moisture such as rainwater that has entered the purification unit main body through the ventilation holes, when absorbed by the activated carbon fiber molded body, falls slowly in areas where the fiber density is high, and in areas where the fiber density is low, it is more rapid than in areas where the fiber density is high. Therefore, the ability to purify the activated carbon fiber molded body with moisture can be improved by the amount provided for the region where the fiber density is high.

It is a front view of the purification | cleaning structure which shows one Embodiment of this invention. It is a rear view of the purification structure. It is a disassembled perspective view which shows a part of component of the air purification unit which comprises the purification structure. It is a vertical side view of the same air purification unit. It is the perspective view which isolate | separated the vertical frame member which comprises the air purification unit. It is a perspective view of the vertical frame member (right vertical frame member) which comprises the air purification unit. It is a perspective view of the activated carbon fiber molding which comprises the air purification unit. It is a cross-sectional view which shows the connection state of the air purification unit and a column member. It is the end elevation which omitted the internal structure in the XX area | region of the same FIG. Is a table showing the test results of the purification ability of the NO ₂ in the cleaning structure. It is a graph which shows the test result of the purification capacity of NO of the purification structure.

  Hereinafter, an embodiment of a purification structure according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the purification structure 1 in this embodiment is used as, for example, a blindfold in a sidewalk or a parking lot, and includes nitrogen oxide, sulfur oxide, volatile carbonization contained in a fluid to be purified such as air. It is composed of a plurality of air purification units (corresponding to purification units) 2 using catalyst fibers effective for removing contaminants such as hydrogen and dust containing suspended particulate matter. Further, the purification structure 1 has a purification function using the fluid to be purified as air and a soundproofing function for absorbing noise generated from the vehicle.

  As shown in FIG. 1, the purification structure 1 is formed by combining an air purification unit 2 up and down. Here, the configuration of one air purification unit 2 will be described. As shown in FIGS. 2 to 7, the air purification unit 2 includes a purification unit main body (hereinafter simply referred to as “main body”) 3 formed in a box shape, an activated carbon fiber molded body 4 housed in the main body 3, and a sound absorption. A material 5 and a shielding material 6 are provided.

  The main body 3 includes a frame composed of an upper frame member 7, a lower frame member 8, a left vertical frame member 10, and a right vertical frame member 11, a rectangular surface plate 12 provided at the front of the frame, It is comprised from the rectangular backplate 13 provided in the rear part of the body.

  The upper frame member 7 is formed in a rectangular tube shape along the left-right direction from the front plate portion 71, the rear plate portion 72, the bottom plate portion 73, and the top plate portion 74. In the lower part of the front plate portion 71, a front holding groove 75 is formed along the left-right direction in which the upper side portion 120 of the surface plate 12 is inserted and supported. A rear holding groove 76 along the left-right direction is formed in the lower portion of the rear plate portion 72 and the upper side portion 130 of the back plate 13 is inserted and supported. The mounting grooves 77 and 77 along the left-right direction for mounting a cap C, which will be described later, or for inserting insertion pieces 87, 87, which will be described later, are formed in the front and rear portions of the top surface of the top plate 74. ing. On the inner side of the upper frame member 7, dovetail-shaped screw holes 78, 78 are formed in the left and right directions on the opposing surfaces of the front plate portion 71 and the rear plate portion 72.

  The lower frame member 8 is formed in a rectangular tube shape along the left-right direction from the front plate portion 81, the rear plate portion 82, the bottom plate portion 83, and the top plate portion 84. In the upper part of the front plate portion 81, a front holding groove 85 is formed along the left-right direction in which the lower side portion 121 of the surface plate 12 is inserted and supported. In the upper part of the rear plate part 82, a rear holding groove 86 is formed along the left-right direction into which the lower side 131 of the back plate 13 is inserted and supported. The insertion pieces 87, 87 that are fitted in the mounting grooves 77, 77 of another air purification unit 2 (for example, disposed on the lower side) in the front and rear portions of the bottom surface of the bottom plate portion 83, along the left-right direction. Is formed so as to protrude downward. The front plate portion 81 and the rear plate portion 82 are formed with plate-like extensions 88 and 88 extending downward with respect to the bottom plate portion 83 in the left-right direction. On the inner surface of the lower frame member 8, dovetail-shaped screw holes 89 and 89 are formed in the left and right directions on the opposing surfaces of the front plate portion 81 and the rear plate portion 82.

  Since the left vertical frame member 10 and the right vertical frame member 11 are configured to be used symmetrically, the right vertical frame member 11 will be described in detail with reference to FIGS. 5 and 6 and also used for the description of the left vertical frame member 10. To do. The right vertical frame member 11 is formed at a predetermined height (length), and is horizontal from the front vertical plate portion 110 and the horizontal vertical plate portion 111 bent rearward from the end of the front vertical plate portion 110. The cross section in the direction is formed in a substantially L shape. Two front sandwiching longitudinal members 112 that are parallel to the front vertical plate portion 110 and protrude toward the front surface plate 12 are provided at the front portion of the horizontal vertical plate portion 111 with a predetermined width in the front and rear, and are integrated as a pair. Is formed. Two rear sandwiching longitudinal members 113 that are parallel to the front sandwiching longitudinal member 112 and project to the back plate 13 side are arranged at a rear portion of the lateral longitudinal plate portion 111 with a predetermined width in the front and rear. Is formed.

  Between the front clamping longitudinal member 112, the right side part 122 of the surface plate 12 is inserted and clamped. A right side portion 132 of the back plate 13 is inserted and sandwiched between the rear clamping longitudinal members 113 (see FIG. 8). The front sandwiching longitudinal member 112 and the rear sandwiching longitudinal member 113 are formed so as to be lower (shorter) than the height (length) of the lateral longitudinal plate portion 111 (same for the longitudinal longitudinal plate portion 110). Both the longitudinal member 112 and the rear clamping longitudinal member 113 do not reach the upper end portion and the lower end portion of the lateral vertical plate portion 111, and the upper and lower portions of the lateral longitudinal plate portion 111 are the upper frame member 7 and the lower frame member. 8 are used as the contact planes 111a with which the end faces 8 respectively contact.

  Screw holes 114, 114 penetrating in the left-right direction are formed in the contact flat surface 111 a at the upper end of the lateral side vertical plate portion 111. When the end surface of the upper frame member 7 comes into contact with the upper contact plane 111a, screws (not shown) are screwed from the screw holes 114, 114 toward the screw holes 78, 78 of the upper frame member 7. The right vertical frame member 11 and the upper frame member 7 are fixed to each other by being inserted.

  Screw holes 115, 115 penetrating in the left-right direction are also formed in the contact flat surface 111 a at the lower end of the horizontal side vertical plate portion 111. When the end surface of the lower frame member 8 comes into contact with the lower contact plane 111a, screws (not shown) are screwed from the screw holes 115, 115 toward the screw holes 89, 89 of the lower frame member 8. By making it enter, the lateral side vertical plate portion 111 and the lower frame member 8 are fixed to each other.

  Since the left vertical frame member 10 is symmetrical with the right vertical frame member 11, the details are omitted, but the left side of the front plate 12 is interposed between the front clamping vertical members 112 of the left vertical frame member 10. The side part 123 is inserted and clamped. The left side portion 133 of the back plate 13 is inserted and sandwiched between the rear sandwiching longitudinal members 113. Although not shown, drain holes are formed in the lower portions of the left vertical frame member 10 and the right vertical frame member 11.

  As shown in FIGS. 3 to 5, the surface plate 12 is preferably made of punched metal. That is, the surface plate 12 has a large number of ventilation holes 12a having a predetermined diameter and allowing ventilation between the front and back surfaces on the plate surface. The ventilation holes 12a are formed to have the same diameter, and are arranged alternately (staggered) in the vertical direction and the horizontal direction. The back plate 13 is made of a laminate of an aluminum sheet and a synthetic resin sheet, and is excellent in impact resistance and wind pressure resistance.

  The activated carbon fiber molded body 4 is configured to include activated carbon fibers (also referred to as ACF) and has ventilation between the front and back surfaces. As shown in FIGS. 3, 4, and 7, the activated carbon fiber molded body 4 is formed by processing activated carbon fibers into a felt shape, a sheet shape, and a plate shape, and further forming a pleated shape. The pleated shape is a state in which a ventilation space AW is formed in the crease direction on each of the front and back surfaces of the fiber by forming a crease (pleat crease) in a flat fiber by alternately repeating a mountain fold and a valley fold. Say.

  Specifically, as shown in FIG. 3, the activated carbon fiber is processed into a pleated shape, whereby a ventilation space AW along the pleat fold is formed on the front side and the back side of the activated carbon fiber molded body 4. Become. The ventilation space AW is a purification space that purifies the air A entering from at least the ventilation holes 12a of the surface plate 12 by contacting the activated carbon fiber.

  Since the activated carbon fiber has air permeability, the air A can be passed between the pleats formed on the activated carbon fiber molded body 4. The pleats only need to have a shape capable of forming a purification space in which air A can be ventilated satisfactorily. However, the height of the pleats, that is, a peak 40 (protrusion toward the front side) and a valley The distance between the pleat crest 40 and crest 40 is also the distance between the trough 41 and the trough 41 (the distance between the trough 41 and the trough 41). It is preferable that it is about 10 mm-80 mm (in this case 35-50 mm). In this embodiment, it is comprised so that the peak part 40 and the trough part 41 may be repeated along the up-down direction of the backplate 13 or the surface board 12. FIG.

  The activated carbon fiber molded body 4 processes the activated carbon fiber into a felt shape, a sheet shape, and a plate shape. For example, felt-like, sheet-like, and plate-like activated carbon fibers can be obtained by processing activated carbon fibers into a flat nonwoven fabric using a known method. As shown in FIG. 7, a shape retaining member K is used to retain the activated carbon fiber molded body 4 in a pleated shape.

  The shape-retaining member K is made of a material that is provided only on the back side of the activated carbon fiber molded body 4 and has air permeability. Specifically, the shape retaining member K is formed in a wire mesh shape. By forming it in a wire mesh shape, it has air permeability, and this shape-retaining member K itself is formed in a pleat shape, and the activated carbon fiber molded body 4 is bonded along the mountain and valley portions of the shape-retaining member K. The activated carbon fiber molded body 4 can be held in a pleated shape by bonding with an agent.

The activated carbon fiber constituting the activated carbon fiber molded body 4 can satisfactorily oxidize and remove contaminants in the air A, particularly NOx. In this case, specific surface area by the nitrogen adsorption method is in a range of 400m ² / g~500m ² / g, in the pore distribution analyzed by the MP method, of the following micropores diameter 2 nm, the followings diameter 1nm total What occupies 80% or more of the micropore volume is preferably used. With such an activated carbon fiber adsorption function and catalytic function, it is possible to remove nitrogen monoxide (NO), which is difficult to remove at room temperature, among NOx causing air pollution, for a long period of time at room temperature.

In addition, as the activated carbon fibers constituting the activated carbon fiber molded body 4, it is preferable to use pitch-based activated carbon fibers (for example, “A-5” manufactured by Adol Co., Ltd.) or polyacrylonitrile-based activated carbon fibers. In addition to NO ₂ which is relatively easy, NO which has been difficult to remove can be removed well.

  In this embodiment, the sound-absorbing material 5 is a cotton-like assembly made of thermoplastic synthetic resin fibers, and is shaped into a rectangular sheet (plate), the size of which is the same as that of the surface plate 12. It is. A water repellent sheet 51 is provided on the entire surface of the front surface of the sound absorbing material 5. As shown in FIG. 4, the sound absorbing material 5 with the water repellent sheet 51 is housed together with the activated carbon fiber molded body 4 in a hollow portion formed between the front plate 12 and the back plate 13. The sound absorbing material 5 is formed thicker than the distance between the crest 40 and the trough 41, which is the height of the pleats forming the activated carbon fiber molded body 4.

  Specifically, the material of the sound absorbing material 5 is a polyester mainly composed of polyethylene terephthalate, but it may be appropriately kneaded or copolymerized with a polyester such as polybutylene terephthalate or polyethylene isophthalate. Moreover, you may use synthetic resins, such as polyethylene, a polypropylene, an acrylic resin, and polyamide. Furthermore, when creating a fiber with these synthetic resins, the fiber may be constituted by a core part and a covering part arranged on the outer periphery thereof. In this embodiment, the fiber form of the sound absorbing material 5 is a synthetic resin fiber having a length of 30 to 100 mm and a thickness of 5 to 100 μm, but is not particularly limited thereto. In addition to the above materials, glass wool, glass wool or the like may be used.

  A shielding material 6 is further provided in the hollow portion. In this embodiment, the shielding material 6 is preferably a metal plate having a sound insulation function such as a sound insulation plate or a sound absorption and insulation plate. The shielding member 6 is formed in a U-shaped longitudinal section from a main body plate 151 having the same area as the sound absorbing material 5 and a holding side portion 152 formed by bending the upper and lower ends of the main body plate 151 forward. Has been. The sound absorbing material 5 is sandwiched between the holding side portions 152.

  The positional relationship among the activated carbon fiber molded body 4, the sound absorbing material 5 and the shielding material 6 is housed in the main body 3 from the front side in this order. That is, the activated carbon fiber molded body 4, the sound absorbing material 5 and the shielding material 6 are sandwiched between the front plate 12 and the back plate 13, and in particular, the activated carbon fiber molded body 4 is the apex of the peak portion 40 on the front side. The vicinity contacts the back surface of the surface plate 12 and is pressed backward, and the vicinity of the apex of the valley 41 on the rear surface side contacts the surface of the sound absorbing material 5 and is pressed forward.

  As described above, the crest 40 of the activated carbon fiber molded body 4 is pressed backward, and the trough 41 is pressed forward, so that the thickness of a predetermined region including the pressed portion has a pressing force. It is reduced by the amount received. That is, in the state where the activated carbon fiber molded body 4 is held by the main body 3, the peak 40 on the surface plate 12 side of the activated carbon fiber molded body 4 and the valley 41 on the sound absorbing material 5 side of the activated carbon fiber molded body 4 The fiber density is a region that is higher than that of other regions. That is, as shown in FIG. 7, the activated carbon fiber molded body 4 has a fiber density higher than that of the region 16 in which the fiber density of the activated carbon fiber is high and the region 16 in which the fiber density is high in the state of being embedded in the main body 3. Low regions 17 are alternately present in the vertical direction.

  However, the shape-retaining member K is provided only on the back surface of the activated carbon fiber molded body 4, and the trough portion 41 is provided with the shape-retaining member K, so that the fibers of the trough portion 41 are compared with the crest portion 40. The density is low. In FIG. 7, the region 16 and the region 17 are separated in a dimension line for convenience, but in actuality, they are not separated in this way, and the boundary is not clear.

  If this is taken as a dimensional viewpoint, the distance between the ridge 40 and the valley 41 of the activated carbon fiber molded body 4 that is the height of the pleats is the distance from the surface of the sound absorbing material 5 to the back of the surface plate 12. It is set larger than. Further, the ventilation holes 12 a formed in the surface plate 12 are arranged so as to be formed in a region of the activated carbon fiber molded body 4 facing at least the valley 41. That is, as shown by the phantom line in FIG. 7, when the activated carbon fiber molded body 4 receives a pressing force, the peak portion 40 has a shape that is scooped backward, and at least in the region that is in contact with the surface plate 12, the contact is made. The fiber density is higher than that of the unexposed area.

  In this embodiment, in the purification structure 1, two air purification units 2 having the above-described configuration are stacked in the vertical direction so that the surface plate 12 is flush. In order to overlap the air purification unit 2, the insertion piece 87 is fitted into the mounting groove 77.

  In FIG. 1, the code | symbol 18 is a pillar member for installing the air purification unit 2 in a predetermined place. The column member 18 is formed in a rectangular tube shape, and is attached to the side portion of the right vertical frame member 11 via front and rear overlapping plate members 19 and 20 as shown in FIG. The front overlapping plate member 19 is integrally formed from a covering plate portion 191 formed in a vertically long flat plate shape and an abutting plate portion 192 formed so as to be bent rearward from the column member 18 side end portion of the covering plate portion 191. Is formed. The covering plate portion 191 is superimposed on the front surface of the front vertical plate portion 110, and the contact plate portion 192 contacts the side plate 181 of the column member 18 in the left-right direction.

  The rear overlapping plate member 20 includes a vertically long flat plate-shaped covering plate portion 21, a contact plate portion 22 that is bent forward from an end portion of the covering plate portion 21, and contacts the side plate 181 of the column member 18. It is integrally formed with an overlapping portion 23 that is bent obliquely forward from the front portion of the contact plate portion 22 and abuts the front vertical plate portion 110 of the right vertical frame member 11 on the back surface thereof.

  The bolt B1 is inserted from the side of the column member 18 and screwed into the nut member T1 on the abutting plate portion 22 side, and the front overlap plate member 19 and the front vertical plate portion 110 of the right vertical frame member 11 are connected to the rear side. The air purification unit 2 is supported by the column member 18 by overlapping the overlapping portion 23 of the overlapping plate member 20 in the front-rear direction, inserting the screw B2 from the front side, and screwing the nut member T2 on the back side of the overlapping portion 23. Has been. Such column members 18 are on the left and right sides of the air purification unit 2, and the left side of the air purification unit 2 is supported in a symmetrical configuration. In FIG. 9, reference symbol C denotes the cap that is attached to the upper portion of the upper frame member 7 at the attachment portion of the column member 18 and the air purification unit 2.

  In the present embodiment, the air purification unit 2 is assembled as follows. That is, the upper side 120 of the front plate 12 is held in the front holding groove 75 of the upper frame member 7, the upper side 130 of the back plate 13 is held in the rear holding groove 76, and the lower side 121 of the front plate 12 is held in front of the lower frame member 8. The lower side 131 of the back plate 13 is inserted and supported in the groove 85 in the rear holding groove 86, and then either the right vertical frame member 11 or the left vertical frame member 12, for example, the right vertical frame member 11 is fixed. A box-like body having an open left side is formed. And the back board 13 is inserted into the inside of the said box state from the left side opening part, and also the sound-absorbing material 5 and the activated carbon fiber molding 4 are press-fitted. Thereby, since the activated carbon fiber molding 4 receives the force compressed from the front-back direction inside the said box state, the area | region 16 with a high fiber density and the area | region 17 with a low fiber density can be formed. In addition, if the peak part 40 and the trough part 41 of the activated carbon fiber molded body 4 are formed in the same direction as the press-fitting direction, the rigidity of the activated carbon fiber molded body 4 is increased and it is preferable to press-fit. Finally, the left vertical frame member 12 is fixed.

  As described above, in the purification structure 1, the two air purification units 2 configured as described above are stacked in the vertical direction so that the surface plate 12 is flush. When the air purification unit 2 is transported or handled at the installation site, the activated carbon fiber molded body 4 or the like inside the air purification unit 2 does not move easily due to the structure of the air purification unit 2. The damage, deformation, noise, etc. that occur can be suppressed.

  In the purification structure 1 having the above-described configuration, air A, which is a fluid to be cleaned, enters the air purification unit 2 from the ventilation holes 12 a of the surface plate 12. And the ventilation hole 12a is arrange | positioned so that it may be formed in the area | region facing the trough part 41 at least of the activated carbon fiber molded object 4, and the activated carbon fiber molded object 4 has the vertex vicinity of the peak part 40 of the front side. The back surface 12b of the front surface plate 12 is contacted and pressed rearward, and the vicinity of the apex portion of the rear surface valley 41 is in contact with the front surface 5a of the sound absorbing material 5 (water repellent sheet 51) and pressed forward. For this reason, the ventilation space AW (space area) on the back side of the surface plate 12 formed by the two peak portions 40 and the one valley portion 41 is partitioned from the ventilation space AW adjacent in the vertical direction.

  For this reason, the air A that has entered the main body 3 from the ventilation holes 12a of the surface plate 12 tends to stay in the ventilation space AW, and the time during which the air A stayed in the ventilation space AW is in contact with the activated carbon fiber molded body 4 is long. Since the length increases accordingly, the contaminant can be removed with a high removal rate.

  Further, in the activated carbon fiber molded body 4, the crest portion 40 on the surface plate 12 side is pressed to the back surface side by the surface plate 12. For this reason, the area | region 16 and the low area | region 17 with which the fiber density of activated carbon fiber is high exist alternately by the up-down direction. And rainwater etc. penetrate | invade from the ventilation hole 12a of the surface board 12. FIG. When moisture such as rainwater that has entered the main body 3 from the ventilation holes 12a of the surface plate 12 is absorbed by the activated carbon fiber molded body 4, it slowly falls in the region 16 where the fiber density is high, and in the region 17 where the fiber density is low. Compared to the high area 16, it descends rapidly. The moisture absorbed in the activated carbon fiber molded body 4 is lowered in this manner, so that the inside of the activated carbon fiber molded body 4 is lower than the activated carbon fiber molded body 4 formed only in the region 17 where the fiber density is low. The average flow rate of the water passing through is reduced. And if an average flow velocity becomes slow, the long time when a water | moisture content will contact the activated carbon fiber of the activated carbon fiber molding 4 will become long. For this reason, the purification property of NOx adsorbed by the activated carbon fiber molded body 4 is improved.

  Further, a water repellent sheet 51 that prevents moisture from entering the sound absorbing material 5 is applied to the surface of the sound absorbing material 5. For this reason, since it is difficult for water to enter the sound absorbing material 5, the sound absorbing property of the sound absorbing material 5 can be ensured. Further, since the back plate 13 is made of a laminate of an aluminum sheet and a synthetic resin sheet and uses a material excellent in impact resistance and wind pressure resistance, even if the purification structure 1 receives some external force, the purification structure It can suppress that 1 deform | transforms greatly or is destroyed.

Here, when the activated carbon fiber is formed in a pleat shape, the apex distance (peak height) between the peak 40 and the valley 41 is about 15 mm, and the distance (pitch) between the peak 40 and the peak 40 is about 38 mm. The result of having carried out the experiment of the purification rate of NOx by attaching the activated carbon fiber molded body 4 to the air purification unit 2 is shown. The results of the NO ₂ purification rate experiment are shown in the table of FIG. 10, and the results of the NO purification rate experiment are shown in the diagram of FIG. Further, activated carbon fiber A-5 manufactured by Adol Co., Ltd. was used as the activated carbon fiber, and this was processed into a felt activated carbon fiber molded body 4 having a thickness of 6 mm by card processing, and an aluminum lath net ( 16 * 32 mm) is attached to one side of the activated carbon fiber molded body 4 with an acrylic adhesive, and then the activated carbon fiber molded body 4 is pleated to have the above dimensions. The thing of the state of no load was used, without pressing a back surface.

  The test method is as follows. That is, in the air purification unit 2 having the activated carbon fiber molded body 4 having a width of 2 m and a height of 1 m, the left and right widths are 20 cm from the left end and the range of 1 m in height is the entrance of the test air, and the width is 20 cm in the center. The range of 1m in height is used as an intermediate measurement port, the width of 20cm from the right end and the range of 1m in height as the end measurement port, and the other parts (surface plate 12 etc.) are covered with a plate so that air purification units can be used from unnecessary places. As a state in which the air A did not enter and exit 2, a NOx mixed gas was introduced. A predetermined amount of standard gas having a known concentration was introduced from the cylinder into NOx, and a predetermined amount of air (inlet air amount) was introduced into the air A by a fan to adjust the inlet NOx concentration. And the NOx density | concentration in predetermined | prescribed wind speed (entrance cross-section wind speed) was measured in the entrance, the intermediate | middle measurement port, and the termination | terminus measurement port. The NOx concentration was measured with a chemiluminescence automatic NOx meter, and the wind speed was measured with a hot-wire anemometer.

From Figure 10, the inlet cross-section wind speed 0.17 m / s, and two kinds of 0.34 m / s, the inlet air volume as two types of 1.84m ³ /min,3.67m ³ / min, intermediate measurement port and the end It was confirmed that the NO ₂ removal rates at the measurement port were 57.1 to 88.3% and 77.0 to 87.0%, respectively, which were very high removal rates.

From Figure 11, the inlet cross-section wind speed 0.2 m / s, and two kinds of 0.34 m / s, the inlet air volume as two types of 2.16m ³ /min,3.67m ³ / min, intermediate measurement port and the end It was confirmed that the NO removal rate (denitration rate) at the measurement port was 10.7 to 14.8% and 20.6 to 26.2%, respectively. 10 and 11, the (NO ₂ , NO) concentration at the measurement port indicates the concentration at the intermediate measurement port and the terminal measurement port, respectively.

  The reason why the inlet cross-section wind speed and the inlet air volume are set to the above values is that the purification structure 1 according to this embodiment is used for air pollution such as roadside roads where automobile traffic is high, industrial areas where power plants and factories are densely packed, etc. This is to simulate a remarkable environment and conditions suitable for use in a monthly parking lot, a parking lot in a general household, or a blindfold in a general household where noise is a concern.

  The present invention is not limited to the above embodiment. In the said embodiment, the activated carbon fiber molded object 4 was shape | molded and hold | maintained to the pleat shape, and it comprised so that the peak part 40 and the trough part 41 could be repeated over an up-down direction. However, it is also preferable that the activated carbon fiber molded body 4 is shaped and held in a pleated shape and configured so that the crests 40 and the troughs 41 are repeated in the left-right direction, and this is internally provided in the main body 3. Alternatively, it is possible to repeat the configuration in the vertical direction or the direction inclined with respect to the horizontal direction, not limited to the vertical direction and the horizontal direction. Even in these cases, the space region on the back side of the surface plate 12 formed by the two peak portions 40 and the one valley portion 41 is partitioned from the adjacent space region. For this reason, the air A that has entered the main body 3 tends to stay in each space area, and the air A staying in the space area is in contact with the activated carbon fiber molded body 4 for a longer time. Can be removed with a high removal rate.

  Furthermore, even if the crest 40 and the trough 41 are repeated in the left-right direction or the inclination direction, the activated carbon fiber molded body 4 is in contact with the back surface of the surface plate 12 in the vicinity of the apex of the crest 40 on the front surface side. And pushed backward. For this reason, compared with the activated carbon fiber molded body 4 formed only by the area | region 17 with low fiber density, the average of the water | moisture content which passes the inside of the activated carbon fiber molded body 4 below at least in the area | region where a fiber density is pressed at least. The flow rate becomes slow. And if an average flow velocity becomes slow, the long time when a water | moisture content will contact the activated carbon fiber of the activated carbon fiber molding 4 will become long. For this reason, the purification property of NOx adsorbed by the activated carbon fiber molded body 4 is improved.

  In the said embodiment, although the shape retention member K was provided only in the back surface side of the activated carbon fiber molded object 4, it is not limited to this. That is, it is possible to keep the shape of the activated carbon fiber molded body 4 by providing the shape retaining member K on both surfaces of the activated carbon fiber molded body 4. However, in this case, the shape-retaining member provided on the front side needs to be configured so as not to obstruct the pressing of the peak 40 due to the contact between the peak 40 of the activated carbon fiber molded body 4 and the surface plate 12.

  Since the felt-like and sheet-like activated carbon fibers are flexible and have no shape stability, the activated carbon fiber molded body 4 can be appropriately adopted by adopting a wire net, aluminum, a SUS mesh, a resin net, or the like. Can be processed into a pleated shape.

  In the above embodiment, when the activated carbon fiber is processed into a pleated shape, the mountain fold and the valley fold are repeatedly processed so that the fold can be recognized as a line, but it is necessary that the pleated fold can be recognized as a line in this way. Instead, it may be formed in a wave shape so as to draw a curve that is gentle enough to secure the ventilation space AW (space area). That is, a flat plate made of activated carbon fibers may be processed into a zigzag shape (wave shape), and a pleat valley may be formed between the folds.

  It is also possible to form one or a plurality of holes (holes having a diameter larger than the interfiber distance) in at least one of the region 16 having a high fiber density and the region 17 having a low fiber density, in particular, the region 17 having a low fiber density. It is done. According to this configuration, the air A can easily reach the back side of the activated carbon fiber molded body 4, and then the air A can more easily come into contact with the activated carbon fiber molded body 4 (the contact area can be increased). Further, it becomes possible to further improve the purification efficiency of the air A. In the above-described embodiment, air has been described as a purification target fluid. However, any fluid that contains a contaminant can be used as a purification target fluid without particular limitation.

  The purification unit and the purification structure according to the present invention reduce noise in a place where a certain amount of airflow is generated, and also include nitrogen oxides, sulfur oxides, volatile hydrocarbons, dust containing suspended particulate matter, etc. It can be effectively used to remove pollutants.

  DESCRIPTION OF SYMBOLS 1 ... Purification structure, 2 ... Air purification unit, 3 ... Main body, 4 ... Activated carbon fiber molded object, 5 ... Sound absorption material, 6 ... Shielding material, 12 ... Surface plate, 12a ... Ventilation hole, 12b ... Back surface, 13 ... Back plate, 16 ... region with high fiber density of activated carbon fiber, 17 ... region with low fiber density of activated carbon fiber, 18 ... column member, 40 ... mountain, 41 ... valley, 51 ... water repellent sheet, A ... Air, AW ... Ventilation space, K ... Shape retaining member

Claims (6)

A purification unit for removing contaminants contained in air,
An activated carbon fiber molded body that includes activated carbon fibers and has ventilation between the front and back surfaces is incorporated in the purification unit body,
A shape retaining member for retaining the activated carbon fiber molded body in a pleated shape is provided, and a plurality of ventilation holes are provided on the surface side of the activated carbon fiber molded body and allow ventilation between the front and back surfaces. Provided with a surface plate formed on the plate surface,
A sound absorbing material incorporated in the purification unit main body is disposed on the back side of the shape retaining member,
The height of the activated carbon fiber molded body is set to be higher than the distance from the surface of the sound absorbing material to the back surface of the surface plate, so that it is activated by the shape retaining member. In a state where the carbon fiber molded body is held in a pleat shape and held in the purification unit main body, a peak portion on the surface plate side of the activated carbon fiber molded body is pressed to the back side by the surface plate, and the activated carbon fiber A purification unit characterized in that regions having a high fiber density and regions having a low fiber density are alternately present in the spreading direction of the activated carbon fiber molded body.   The purification unit according to claim 1, wherein regions having high fiber density and regions having low fiber density of the activated carbon fibers are alternately present in the vertical direction.   The purification unit according to claim 1 or 2, wherein the shape-retaining member is provided only on the back side of the activated carbon fiber molded body and has air permeability.   The purification unit according to any one of claims 1 to 3, wherein the ventilation hole formed in the surface plate is formed in a region of the activated carbon fiber molded body facing at least the valley portion.   The purification unit according to any one of claims 1 to 4, wherein a waterproof film that prevents water from entering the sound absorbing material is provided on a surface of the sound absorbing material. A purification structure comprising a combination of the purification units according to any one of claims 1 to 5 adjacent to each other in at least one of an up-down direction and a left-right direction.

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