JPH0716287A - Deodorizing device - Google Patents

Abstract

PURPOSE:To provide an adsorption type deodorizing device having the capability of recovering adsorption characteristics at any time and easily by forming a surface adsorption layer on a metal honeycomb body having electrical heat generating function for constituting an adsorbing and deodorizing medium. CONSTITUTION:A metal honeycomb body H of winding type having many mesh type vent passages (cells) 3 to permit a flow of malodorous gas is fabricated, using a metal sheet flat strip material 1 and a corrugated strip material 2. A center electrode material B is laid in the core of the honeycomb body H. Also, an external power supply C is connected to the electrode material B and the external surface of the body H via lead wires C1 and C2, thereby supplying power and heating the body H. In addition, an adsorption layer 4 formed out of organic porous substance such as alumina, zeolite and activated carbon having adsorbing function, is laid on the surface of each of the strip materials 1 and 2 forming the body H. Thus, an adsorbed malodorous component is desorbed from the layer 4 via the supply of electric power and subsequent heat generation, thereby enabling the adsorbing function to be restored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adsorption type deodorizing device. More specifically, the present invention relates to an adsorption type deodorizing device capable of exhibiting and maintaining a deodorizing function for a long period of time.

[0002]

2. Description of the Related Art Recently, some household appliances have been provided with deodorizing measures. For example, in an electric kotatsu or an electric refrigerator, there is one that oxidizes and burns a malodorous component under a catalytic action to deodorize. More specifically, in the former case, an adsorbent ceramic porous body is provided on the surface of a heating medium such as a quartz tube, and in the latter case, a porous body such as alumina, silk, or zeolite is formed on the surface of the defrosting heater. It is coated and has a platinum catalyst supported thereon.

However, the above-mentioned household equipment having a deodorizing function utilizes a heating medium possessed by an electric kotatsu, an electric refrigerator, etc., and develops the deodorizing function in conformity with the usage environment of these applied products. , Its structure is complicated and expensive. On the other hand, the adsorption type simple deodorizing device using activated carbon or the like works even at normal temperature, but has a short life. Further, in addition to the various household appliances described above, as a deodorizing device for a wide space space such as a home space or a factory space, for example, an adsorption type deodorizing device in which a deodorant such as activated carbon is applied in an air purifier is used. However, in order to obtain a deodorizing effect for a long period of time, it is complicated to replace or replace the deodorant, and the recycling process is troublesome even if it is recycled.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. The present invention uses a metal honeycomb body having a honeycomb structure manufactured by using a flat band material and a corrugated plate material made of a thin metal plate, and the metal honeycomb body is an electric heating type, and This is based on the finding that when a deodorizing device is provided with a coating layer of an inorganic porous material on the wall surface, excellent effects are exhibited. According to the present invention, there is provided an adsorption type deodorizing device capable of easily reproducing the adsorption characteristic at any time.

[0005]

Means for Solving the Problems If the present invention is outlined, the first invention of the present invention is a deodorizing apparatus for adsorbing and deodorizing malodorous components, wherein the adsorbing deodorizing medium is (i) a metal honeycomb body having an electric heating function. And (ii) a deodorizing device having an adsorption layer on the surface of the metal honeycomb body.

The second invention of the present invention is, in a deodorizing apparatus for adsorbing and deodorizing a malodorous component, the adsorbing deodorizing medium is (i) a metal honeycomb body having an electric heating function, and (ii) the metal honeycomb body It has an adsorption layer on the surface, and (ii
i) A deodorizing device characterized in that it comprises a catalyst substance supported on the adsorption layer.

The technical construction and embodiments of the present invention will be described in detail below with reference to the drawings. It goes without saying that the present invention is not limited to the illustrated one.

As described above, in the deodorizing apparatus for adsorbing and deodorizing the malodorous component of the present invention, the main constitution is a metal honeycomb body. This kind of metal honeycomb body is known as a metal carrier matrix for carrying a catalyst for purifying exhaust gas of an automobile or the like. That is, the metal carrier matrix for supporting the above-mentioned catalyst for purifying exhaust gas (for example, catalysts such as Pt, Rh, Pd) should have a large amount of catalyst supported per unit volume (exhaust gas per unit volume). Maximize the effective contact area between the gas and the purification catalyst), reduce the back pressure (exhaust resistance) in relation to engine efficiency, and further reduce the weight of the metal-supported matrix as much as possible. In consideration of the above, etc., a honeycomb-shaped structure is formed by stacking heat-resistant thin metal plate flat plate-shaped strips (hoops) and corrugated strips so that they are in contact with each other (honeycomb body). ).

The above-mentioned metal honeycomb body having a honeycomb structure may be of a wound type or a laminated type, depending on the method of forming the flat plate-shaped band material and the corrugated plate-shaped band material into the honeycomb structure. The wound-type metal honeycomb body is manufactured by stacking a flat plate-shaped band material and a corrugated plate-shaped band material, and winding and forming the stacked spiral-wound shape in one batch. It is manufactured by alternately stacking the steps. By molding both strips into a honeycomb body, a large number of mesh-like ventilation passages (cells) serving as exhaust gas passages are automatically formed. In addition, various types such as a radial type, an S-shaped type, a tongue-shaped type, and an X-wrap type are known. (JP-A-62-273050, the same
62-273051, JP-A 1-218637, Japanese Patent Publication 3-50266,
JP-A-4-227855).

The metal honeycomb body for treating the exhaust gas of the internal combustion engine is, for example, 0.1 mm or less (preferably
It is manufactured by using flat strips and corrugated strips made of heat-resistant thin steel plate (50 μm or less). The flat and corrugated strips are made of materials such as high temperature corrosion resistance, cold and heat resistance (durability under stop and start cycles of internal combustion engine), and high temperature oxidation resistance in consideration of their use environment. Fe-Cr-Al type (20Cr-5Al type) excellent in physical properties such as properties, or added with a small amount of rare earth element component (REM) to further improve high temperature oxidation resistance is used. ing.

In the present invention, it is not always necessary to use the above-mentioned expensive heat-resistant steel foil in consideration of the use environment of the deodorizing device, generally operating at room temperature and the conditions for the regeneration treatment of the adsorption characteristics described later, and it is not always necessary. It is sufficient to use a strip material made of a thin metal plate. Of course, when the adsorbed substance is made completely harmless, for example, when the adsorbed substance is oxidized and burned under a catalytic action as described later, a highly heat-resistant strip (steel foil) is used. Needless to say. Further, in the present invention, in the metal honeycomb body configured as described above, the contact portion between the flat plate-shaped band member and the corrugated plate-shaped band member is
Part or all of them are joined by welding or brazing.

FIG. 1 shows the above-mentioned metal honeycomb body (H).
FIG. 3 is a perspective view of the deodorizing device (A) of the first embodiment of the present invention whose main component is. The illustrated metal honeycomb body (H) is a wound type manufactured by using a flat band member (1) made of a thin metal plate and a corrugated plate member (2). As shown in the figure, by winding the strips (1, 2) around a honeycomb body, a large number of mesh-like ventilation holes for distributing malodorous gas in the household, office, or factory to be deodorized. The path (cell) (3) is automatically formed.

In FIG. 1, an external power source (which may be DC or AC) (C) is a lead wire (C ₁ , C ₂ ).
Is connected to the central electrode material (B) disposed in the central portion of the metal honeycomb body (H) and the outer peripheral portion of the metal honeycomb body (H), and the metal honeycomb body (H) is of the electric heating type.

FIG. 2 is a perspective view of a deodorizing device (A) according to a second embodiment of the present invention, which has a metal honeycomb body (H) having a structure different from that of FIG. 1 as a main constituent element. In the deodorizing device (A) of the second embodiment, other technical constitution is the same as that of the first embodiment except that the structure of the metal honeycomb body (H) is of a laminated type in which layers are laminated in layers. It is the same as the deodorizer. Next, the structure of the metal honeycomb body (H) of the present invention will be described.

FIG. 3 is a partially enlarged view of a metal honeycomb body (H) made of the flat strip (1) and the corrugated strip (2) according to the first embodiment of the present invention. One abutting portion of the material (1, 2) and its vicinity are enlarged and illustrated. As shown in the figure, the metal honeycomb body (H) of the first embodiment having an electric heating function, which is a main component of the deodorizing apparatus (A) of the present invention, has an adsorption layer (4) on its surface. Is. That is, on the surfaces of the flat plate-shaped band member (1) and the corrugated plate-shaped band member (2) constituting the metal honeycomb body (H), an inorganic porous material such as alumina, zeolite, silica, or activated carbon having an adsorption function is provided. An adsorption layer (4) consisting of is formed. The adsorption layer (4) may be formed by immersing the metal honeycomb body (H) in a slurry of these inorganic porous bodies, and the method for forming the adsorption layer is not particularly limited. Also, regarding the thickness of the adsorption layer (4), considering the usage conditions,
It may be determined appropriately and is not particularly limited.

FIG. 4 is a partially enlarged view of a metal honeycomb body (H) made of the flat strip (1) and the corrugated strip (2) of the second embodiment of the present invention. One abutting portion of the strips (1, 2) and its vicinity are shown enlarged. As shown in the figure, the metal honeycomb body (H) of the second embodiment having an electric heating function, which is a main component of the deodorizing apparatus (A) of the present invention, has an adsorption and catalyst layer (5) on its surface.
Is to have. The adsorption and catalyst layer (5) is obtained by further supporting a catalyst component such as platinum (Pt) on the adsorption layer (4) of the first embodiment.

In the present invention, in the first embodiment, when the adsorption characteristic is regenerated, the metal honeycomb body (H) is electrically heated so that the adsorbed malodorous component is desorbed from the adsorption layer (4) to improve the adsorption characteristic. It is something to play. On the other hand, in the second embodiment, the metal honeycomb body (H) is electrically heated when the adsorption characteristic is regenerated, and the adsorbed malodorous component is oxidized by the catalytic action of the carried platinum (Pt) or the like. Alternatively, it oxidizes and burns to regenerate the adsorption characteristics.

FIG. 5 is a partially enlarged view of a metal honeycomb body (H) made of the flat strip (1) and the corrugated strip (2) according to the third embodiment of the present invention. One abutting portion of the strips (1, 2) and its vicinity are shown enlarged. As shown in the figure, the metal honeycomb body (H) of the third embodiment is characterized in that both strips (1, 2) are in abutting relationship with each other via the electric insulating layer (6). The electrically insulating layer (6) may be formed using an electrically insulative material such as a glass fiber sheet or a ceramic sheet, and is not particularly limited as long as it is electrically insulative.

In the present invention, the reason for providing the electric insulation layer (6) is that when the metal honeycomb body consisting of both strips (1, 2) made of a metal plate is of an electric heating type as shown in FIG. Flows in the shortest distance between the center electrode (B) and the outer peripheral portion of the honeycomb body (electricity flows in the shortest distance through the contact portion of both strips.) Depending on the material of the strip, sufficient resistance heat generation can be obtained. May not be. The third embodiment is intended to solve such a drawback, and electricity is allowed to flow through the inside of the honeycomb body at the longest distance from the electric insulating layer (6), and a sufficient resistance heat generation amount is secured. It

In the metal honeycomb body (H) of the present invention, which is of the electric heating type, it is heated to a temperature sufficient to cause desorption of the adsorbed material or oxidative combustion due to the catalytic action when the current is applied. . Depending on the material of the adsorption part, for example, if the NOx component in the air in the factory is also reduced, the surface temperature of the adsorption and catalyst layer (6) is 900 ℃.
It is preferred to maintain at ~ 1000 ° C. In the present invention,
As a means for maintaining the temperature of the metal honeycomb body (H) at a sufficiently high level during heating by energization, providing the electrically insulating sheet layer (6) as in the third embodiment is one means. Not limited. For example, instead of using a single metal honeycomb body (H) in FIG. 1, a plurality of metal honeycomb bodies may be arranged in series to obtain a sufficient resistance value. The scheme may be combined with the third embodiment.

[0021]

The deodorizing apparatus for adsorbing and deodorizing malodorous components according to the present invention comprises a metal honeycomb body having an electric heating function, that is, a flat metal strip and a corrugated metal strip as main constituent elements. Since the manufactured honeycomb body having the honeycomb structure is adopted, the adsorption layer made of the inorganic porous material formed on the surface of the honeycomb body can secure a large area per unit volume, and thus has excellent adsorption ability and is lightweight.

After a predetermined time, the metal honeycomb body is energized and heated to desorb the malodorous component from the adsorption layer (of course, the desorbed component may be collected by a predetermined collecting liquid or the like). The characteristics can be easily reproduced.
Further, in the present invention, by supporting a catalyst such as an oxidation catalyst in the adsorption layer, the adsorption substance (a malodorous component) can be oxidized and burned at the time of regeneration of the adsorption property, and the adsorption property can be easily regenerated. .

[Brief description of drawings]

FIG. 1 is a perspective view of a deodorizing device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a deodorizing device according to a second embodiment of the present invention.

FIG. 3 is a partially enlarged cross-sectional view of the metal honeycomb body of the first embodiment, which is a main component of the deodorizing device of the present invention.

FIG. 4 is a partially enlarged cross-sectional view of a metal honeycomb body of a second embodiment which is a main constituent element of the deodorizing device of the present invention.

FIG. 5 is a partially enlarged cross-sectional view of a metal honeycomb body of a third embodiment which is a main constituent element of the deodorizing device of the present invention.

[Explanation of symbols]

A …………………………………… Deodorizer B ……………………………… Central electrode material C ……………………………… External power supply C ₁ , C ₂ …… …………… Lead wire 1 …………………………………… Flat plate strip 2 ……………………………… Corrugated strip strip 3 ……………………… ...... Reticulated vent passage (cell) 4 ……………………………… Adsorption layer 5 ………………………… Adsorption and catalyst layer 6 ……………………………… ...... Electrical insulation layer

Claims (6)

[Claims] 1. A deodorizing device for adsorbing and deodorizing a malodorous component, wherein the adsorbing deodorizing medium is (i) a metal honeycomb body having an electric heating function, and (ii) an adsorbing layer on the surface of the metal honeycomb body. A deodorizing device characterized by being configured with 2. A deodorizing device for adsorbing and deodorizing a malodorous component, wherein the adsorbing deodorizing medium is (i) a metal honeycomb body having an electric heating function, and (ii) an adsorbing layer on the surface of the metal honeycomb body, And (iii) a deodorizing device characterized in that it comprises a catalyst substance supported on the adsorption layer. 3. A metal honeycomb body having an electric heating function is a honeycomb body manufactured by laminating flat band members made of thin metal plates and corrugated plate members so as to be in contact with each other. The deodorizing device according to claim 1 or 2, which has an electrode terminal for. 4. A metal honeycomb body having an electric heating function is formed by using a strip material having a surface of at least one of a flat strip material and a corrugated strip material made of a thin metal plate. The deodorizing device according to claim 1 or 2, which is a honeycomb body manufactured by stacking both strips so as to be in contact with each other, and having an electrode terminal for energization. 5. The deodorizing device according to claim 1, wherein the adsorption layer is made of an inorganic porous material. 6. The deodorizing device according to claim 1, wherein the catalyst substance is an oxidation catalyst that oxidizes a malodorous component.