JP2006305194A - Catalyst holder, and gas removing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas removing apparatus where surface leakage in plasma discharge can be prevented and voltage is applied uniformly to the whole of the catalyst. <P>SOLUTION: The gas removing apparatus is provided with catalyst holders 11 which are respectively provided with: a plane electrode 3 arranged on the upper surface of an insulation plate 1; a pair of regulation members 5A and 5B arranged on the upper surface of the insulation plate 1 across the electrode 3; a pair of air circulation members 7 arranged on one end side and the other end side of the pair of regulation members 5A and 5B and permitting the flow of air in a direction along the upper surface of the insulation plate 1; a pelletized catalyst 9 arranged on the electrode 3 in an area surrounded by the pair of regulation members 5A and 5B and the pair of air circulation members 7; and a lead wire part 3A of the electrode 3. In the catalyst holder 11, the whole constitution is constituted to be flat to be piled up into multiple layers. Then, the plurality of catalyst holders 11 are laminated so that the air circulation members 7 in the plurality of catalyst holders 11 may direct the same side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a catalyst holding device that holds a catalyst used in an air conditioner such as an air purifier or an air conditioner to remove odors and harmful gases, and gas removal using the catalyst holding device. More particularly, when plasma discharge is performed to generate ozone, plasma discharge can be performed by applying a low voltage to prevent creeping leakage, and voltage can be uniformly applied to the entire catalyst. The present invention relates to a catalyst holding device that can apply a gas and a gas removal device that can easily change the gas removal capacity.

Conventionally, a catalyst is arranged between a pair of electrodes, an AC voltage is applied to the electrodes to generate plasma discharge, ozone deodorization is performed by ozone generated by the plasma discharge and an ozone decomposition catalyst, and heat is generated during discharge. Is used to regenerate the catalyst (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 11-319489

  In the configuration as described in Patent Document 1, when the volume of the catalyst is increased in order to increase the processing capacity, the distance between the electrodes is increased, and accordingly, the applied voltage is increased, and creeping leakage is likely to occur. In addition, it is difficult to apply a voltage uniformly to the entire catalyst, and there is a problem that a deviation tends to occur when the catalyst is regenerated.

  The present invention has been made in view of the conventional problems as described above, and is a catalyst holding device, in which a planar electrode disposed on the upper surface of an insulating plate and the upper surface of the insulating plate are interposed between the electrodes. A pair of arranged regulating members, a pair of air flow members arranged on one end side and the other end side of the pair of regulating members and permitting an air flow in a direction along the upper surface of the insulating plate, and the pair of pairs It comprises a pellet-shaped catalyst disposed on the electrode in a region surrounded by a regulating member and a pair of air flow members, and a lead line portion of the electrode.

  Further, the catalyst holding device is a planar electrode disposed on the upper surface of the insulating plate, a regulating member disposed on the upper surface of the insulating plate so as to surround the electrode, and a direction along the upper surface of the insulating plate And a pellet-shaped catalyst disposed on the electrode in a region surrounded by the restricting member, and an extraction line for the electrode. And a portion.

  Further, in the catalyst holding device, the overall configuration is configured to be flat so that a plurality of the catalyst holding devices can be stacked.

  Further, a planar electrode disposed on the upper surface of the insulating plate, a pair of regulating members disposed on the upper surface of the insulating plate with the electrode in between, and disposed on one end side and the other end side of the pair of regulating members And disposed on the electrode in a region surrounded by a pair of air flow members that allow air flow in a direction along the upper surface of the insulating plate, the pair of regulating members, and the pair of air flow members. A plurality of catalyst holding devices are stacked such that the air circulation members in a plurality of catalyst holding devices each having a pellet-shaped catalyst and a lead wire portion of the electrode are directed to the same side. .

  In the gas removal device, the directivity of the catalyst holding devices adjacent to each other is opposite to each other so that the lead-out line portions are opposite to each other.

  In the gas removal apparatus, the pellet-shaped catalyst is hopcalite.

  According to the present invention, the electrode interval for generating discharge can be made, for example, the same as the diameter of the pellet-shaped catalyst or several times smaller, and the voltage applied to the electrode can be reduced compared to the conventional method. It is possible to prevent creeping leaks and improve safety.

  In addition, according to the present invention, since the gas removal device is configured by stacking a plurality of identical catalyst holding devices, the number of catalyst holding devices can be arbitrarily stacked and stacking can be facilitated. Can be easily changed.

  Hereinafter, a catalyst holding device and a gas removal device using the catalyst holding device according to an embodiment of the present invention will be described with reference to the drawings. The catalyst holding device is created as follows.

  That is, as shown in FIG. 1A, for example, glass such as ceramic, quartz, Pyrex (registered trademark), or a material appropriately selected from resins such as polyvinyl chloride, polypropylene, polyamide, polycarbonate, and acrylic, and paper. For example, a metal foil, a copper-plated fiber tape, a net, a wire, or the like is provided on the upper surface of the insulating plate 1 having a rectangular outer shape, on an appropriate inner region from the outer peripheral edge 1A of the insulating plate 1, or a conductive paint is applied. In addition to providing an appropriately planar electrode 3 having a planar spread, the lead wire portion 3A of the electrode 3 is provided so as to protrude from the outer peripheral edge 1A of the insulating plate 1.

  A pair of restricting members 5A and 5B are arranged on the upper surface of the insulating plate 1 at the opposite position around the electrode 3 with the electrode 3 in between. The restricting members 5A and 5B are made of a heat-resistant insulating member, and a gas such as air positioned between the pair of restricting members 5A and 5B permeates the restricting members 5A and 5B and flows out to the outside. Without restricting, the regulating members 5A and 5B are regulated to flow from one end side to the other end side. The regulating members 5A and 5B are fixed to the upper surface of the insulating plate 1 with an adhesive or the like.

  On the upper surface of the insulating plate 1 corresponding to one end side and the other end side of the pair of regulating members 5A and 5B outside the electrode 3, an air circulation member 7 made of, for example, a honeycomb-shaped insulating material is disposed and fixed. is there. The air circulation member 7 has substantially the same thickness as the restriction members 5A and 5B, and is provided with a groove or a through hole through which air can freely flow, and the air along the upper surface of the insulating plate 1 Is allowed.

  As understood from the above description, the electrode 3 disposed on the upper surface of the insulating plate 1 is surrounded by the pair of regulating members 5A and 5B and the air flow member 7, and the enclosed area is the regulating member. 5A, 5B and the recessed part equivalent to the thickness of the air distribution member 7 are formed. Therefore, a flat catalyst holding device 11 as shown in FIGS. 2A and 2B is obtained by filling and arranging the pellet-shaped catalyst 9 in the recess. In the configuration shown in the figure, the case where one regulating member 5A is arranged on the lead wire portion 3A of the electrode 3 is illustrated, but the positions of the regulating members 5A and 5B and the air circulation member 7 are changed. The air circulation member 7 may be arranged on the lead wire portion 3A.

  As shown in FIGS. 2 (A) and 2 (B), a plurality of catalyst holding devices 11 having the above-described configuration are stacked alternately, for example, with the directionality in the left-right direction reversed, and corresponds to the electrode 3 at the top. A lid member 13 having only an electrode (not shown) and a lead portion (not shown) on its upper surface is placed on the insulating plate. Further, for safety, only the insulating plate 1 may be placed to ensure safety such as insulation. And the gas removal apparatus 15 as shown in FIG.2 (C) is fixed by integrally fixing the laminated body which laminated | stacked the several catalyst holding | maintenance apparatus 11 with a bundling belt or a cyclic | annular bundling casing etc. (illustration omitted). It is obtained. A plurality of locations such as near both ends of the pair of regulating members 5A and 5B are provided with through holes, nuts are screwed into bolts that pass through the through holes, and the laminate is tightened by tightening the nuts. It is also possible to adopt a configuration in which the catalyst holding devices 11 are integrally fixed or an integrated configuration by bonding the catalyst holding devices 11 with an adhesive.

  In the gas removal device 15, each lead wire portion 3 </ b> A protruding to one side and each lead wire portion 3 </ b> A protruding to the other side are individually collected and connected to a power source.

  In the configuration as described above, when an AC voltage is applied to the drawn-out line portion 3A on one side and the drawn-out line portion 3A on the other side in the gas removing device 15 having a configuration in which a plurality of catalyst holding devices 11 are stacked, Plasma discharge is generated between the electrodes 3 with the catalyst 9 in the catalyst holding device 11 therebetween, and ozone is generated. Therefore, for example, odor contained in the air flowing into the inside of each catalyst holding device 11 from the one-way air circulation member 7 is deodorized and removed by the action of ozone and the catalyst.

  As described above, when an AC voltage is applied to the one lead wire portion 3A and the other lead wire portion 3A to cause a discharge between the electrodes 3 provided in each catalyst holding device 11, the catalyst holding devices are provided. 11 is a flat structure that is the same as the diameter of the internal pellet-shaped catalyst 9 or about a few times thinner, so that the applied voltage may be relatively low compared to the conventional structure. Leakage can be prevented and safety is further improved.

  Further, since the gas removal device 15 has a configuration in which a plurality of identical catalyst holding devices 11 are laminated, the gas removal device 15 can be easily manufactured, and the number of laminations can be changed according to the use environment, for example. It is easy to change the processing capacity.

  By the way, in the said description, although the case where regulation member 5A, 5B and the air distribution member 7 were each provided separately was demonstrated, it is equivalent to the said air distribution member 7 as an annular structure which surrounds the electrode 3 by the same member. It is also possible to form a slit or a through hole at the location to form an air circulation part. Thus, by forming the regulating members 5A and 5B and the air circulation member 7 in an annular shape by the same member, the number of components of the catalyst holding device 11 can be reduced, and the manufacture becomes easier.

  In the above description, the catalyst holding device 11 is described as having a quadrangular and planar configuration, but the shape is not limited to a quadrangular shape and may be any shape. Further, the catalyst holding device 11 can be configured to have a curved surface appropriately curved so as to increase the area without being limited to a flat shape.

  Moreover, as a structure of the electrode 3, in order to make plasma discharge easier to generate, it is desirable to provide the electrode 3 with a large number of edge portions so that a strong electric field is formed in accordance with the period of the applied AC voltage. That is, as the configuration of the electrode 3, a configuration in which a large number of convex portions or concave portions are provided in the form of dots or streaks on the entire surface of the plate-like electrode 3 shown in FIG. 1 (for example, a copper foil embossed tape that is a fiber tape) , Aluminum foil embossed tape, tin-plated copper foil embossed tape, copper-plated polyester cloth or copper-plated acrylic cloth), and a structure having a large number of intersecting grooves or ridges.

  Further, as the configuration of the planar electrode 3, as shown in FIG. 3 (A), a comb shape having a large number of slits S, or as shown in FIG. It is also possible to form. Also, as shown in FIG. 3 (C), it has a comb shape, and has a configuration in which a plurality of protrusions T are provided in a tooth portion, or a configuration in which a large number of holes H are provided as shown in FIG. 3 (D). It is also possible. That is, as the configuration of the electrode 3, various configurations can be adopted as long as the configuration has a planar spread. By configuring the electrode 3 as described above, an aspect in which an edge portion where a strong electric field is formed is provided in a planar shape, and a discharge is easily generated over the entire surface of the electrode 3.

  By the way, as the catalyst 9 provided in the catalyst holding device 11, hopcalite catalyst pellets are used for the purpose of removing carbon monoxide, and carbon dioxide is used for the purpose of removing VOC (volatile organic compounds) such as acetaldehyde. It is desirable to place and arrange pellets of manganese catalyst. The catalyst is not limited to the hopcalite catalyst or manganese dioxide catalyst, but includes platinum, palladium, copper oxide, iron oxide, nickel oxide, titanium oxide, zinc oxide, tin oxide, zeolite, barium titanate, and mixtures thereof. Various catalysts can be employed.

  By the way, to remove CO, hopcalite is effective as a catalyst. However, hopcalite is extremely weak in humidity, and depending on the season, it is deactivated by simply ventilating indoor air for several minutes, and CO removal cannot be performed. It is known. Therefore, the catalyst holding device 11 and the gas removal device 15 as described above were prepared and tested for the CO removal effect.

  The configuration of the catalyst holding device 11 and the stacked gas removal device 15 is as follows.

Insulation sheet 1 Material: Ceramic 160mm × 110mm × 0.63t
Electrode 3 Material: Aluminum foil tape 120mm x 65mm x 0.05t
Regulating member 5A, 5B Material: Acrylic 110mm × 15mm × 3t
Air circulation member 7 Material: Corrugated cardboard 130mm × 20mm × 1.5t (3t in 2 layers)
Pellet-shaped catalyst 9 Material: Hopcalite φ1.2 × 3t (23g packed)
Number of layers 32 layers Air flow 250L / min (0.25m ³ / min)
As understood from the above configuration, the thickness of the catalyst holding device 11 is several mm (5 mm or less) and extremely thin, and the hopcalite has several layers (three layers or less).

  The relationship between the power and the CO removal rate when air is circulated to the gas removal device 15 and only the plasma discharge is performed by applying an AC voltage to the electrode 3 of the catalyst holding device 11 is A shown in FIG. In the case of air after being dehumidified by a dehumidifier under the same conditions, B. In the case of air dehumidified by a dehumidifier under the same conditions and heated to 45 ° C. by a heater, it was C (measured only when power was 130 w).

  As understood from the above test results, the CO removal effect by the hopcalite catalyst is higher as the humidity of the air to be treated is lower, and the CO removal effect is higher as the temperature of the air is higher. Furthermore, the larger the input power, the higher the CO removal effect.

  After confirming the above effect, next, (a) hepa filter → dehumidifier → plasma discharge region → hopalite pellets (1400 g), and (b) hepa filter under the same conditions → dehumidifier under the same conditions → When the air is sequentially circulated to the gas removal device (hopcalite pellets 1300 g under the same conditions), that is, the arrangement position of the plasma discharge region and the hopcalite pellet is different (a), and the plasma discharge region FIG. 5 shows the result of the test of the CO removal rate in the case of (b) where hopcarite and hopcalite are arranged in the same region.

  As is clear from FIG. 5, in the initial stage, the cases of (a) and (b) are almost the same, but as the number of cigarette loads increases, the case of (a) is better than the case of (b). The CO removal rate is reduced, and the CO removal rate is reduced to about 60% with about 130 pieces. However, in the case of (b), even about 200 are not reduced to about 60%. That is, since the hopcalite is provided in the discharge region, the adsorbed moisture is released because it is heated by the discharge, and the lifetime of the CO removal efficiency is improved. Further, since the catalyst is provided in the discharge region, the overall structure can be reduced in size as compared with the case where the catalyst is provided separately. Furthermore, since the entire catalyst can be uniformly heated by the overall discharge, it is possible to shorten the warm-up operation time for raising the catalyst to a predetermined temperature.

  By the way, since hopcalite as a pellet catalyst has a large CO removal effect and has an ozone removal performance, ozone generated by plasma discharge can also be removed. Therefore, in the gas removal device 15 having the above-described configuration, VOC such as aldehyde can be removed by the oxidizing power of ozone generated by plasma discharge. That is, CO removal, VOC removal, and reduction of the generated ozone concentration can be performed simultaneously.

  As can be understood from the above description, when hopcalite is used as a catalyst, the catalyst can be heated by discharge to release the adsorbed moisture, and the life can be extended by restoring the CO removal ability. Can do. Further, CO removal, VOC removal and generated ozone removal can be carried out simultaneously, and harmful gases can be removed effectively.

It is explanatory drawing at the time of manufacture of a catalyst holding | maintenance apparatus. It is explanatory drawing at the time of manufacturing a gas removal apparatus after manufacturing a catalyst holding | maintenance apparatus. It is explanatory drawing which shows the various forms of an electrode. It is explanatory drawing which shows the effect of the CO removal rate at the time of dehumidifying. It is explanatory drawing which shows CO removal rate in the case where it is made the same as the case where a plasma discharge area | region and a catalyst arrangement position are made separate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insulation board 3 Electrode 3A Lead wire part 5A, 5B Control member 7 Air distribution member 9 Pellet-shaped medium 11 Catalyst holding device 13 Cover member 15 Gas removal device

Claims (6)

  A planar electrode disposed on the upper surface of the insulating plate; a pair of regulating members disposed on the upper surface of the insulating plate with the electrode in between; and one end side and the other end side of the pair of regulating members, A pair of air flow members that allow air flow in a direction along the upper surface of the insulating plate, and a pellet shape disposed on the electrode in a region surrounded by the pair of regulating members and the pair of air flow members A catalyst holding device comprising a catalyst and a lead wire portion of the electrode.   Planar electrodes disposed on the upper surface of the insulating plate, a regulating member disposed on the upper surface of the insulating plate so as to surround the electrode, and air that allows air to flow in a direction along the upper surface of the insulating plate A circulation part is provided at a plurality of locations apart from the regulating member, and includes a pellet-shaped catalyst arranged on the electrode in a region surrounded by the regulating member, and a lead line part of the electrode. Catalyst holding device.   3. The catalyst holding device according to claim 1 or 2, wherein the catalyst holding device has a flat overall structure so that a plurality of the catalyst holding devices can be stacked.   A planar electrode disposed on the upper surface of the insulating plate; a pair of regulating members disposed on the upper surface of the insulating plate with the electrode in between; and one end side and the other end side of the pair of regulating members, A pair of air flow members that allow air flow in a direction along the upper surface of the insulating plate, and a pellet shape disposed on the electrode in a region surrounded by the pair of regulating members and the pair of air flow members A gas removal device, wherein a plurality of catalyst holding devices are stacked so that the air circulation members in a plurality of catalyst holding devices each including a catalyst and a lead wire portion of the electrode are directed to the same side.   5. The gas removing device according to claim 4, wherein the directivity of the catalyst holding devices adjacent to each other is opposite to each other so that the lead wire portions are opposite to each other.   6. The gas removing apparatus according to claim 4, wherein the pellet catalyst is hopcalite.

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