JPH10277365A - Catalyst structure for air cleaning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the loss of heat energy while the adsorption area of an adsorbent which adsorbs odor components or harmful components in air being increased when it is regenerated by heating. SOLUTION: A disk-shaped adsorption plate 8 carrying an adsorbent is rotated by a motor 9. A fan-shaped cover 11 which covers part of the plate 8 and allows the rotation of the plate 8 is installed. Odor components or harmful components in air are adsorbed by the uncovered part of the plate 8, and the covered part of the plate is heated by a heating unit to desorb the components so that adsorbent is regenerated while the desorbed components are decomposed/ removed by a catalyst.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purification catalyst structure for trapping and decomposing and removing odorous or harmful components in air.

[0002]

2. Description of the Related Art In order to remove odor components or harmful components from the air, an adsorbent that adsorbs the odor components or harmful components, a catalyst that decomposes the odor components or harmful components desorbed from the adsorbent, It is generally known that a catalyst structure formed by combining an adsorbent and a heating element for heating a catalyst is incorporated into an air purification device, a refrigerator, an air conditioner, or the like. In this case, the adsorbent is regenerated by removing odorous or harmful components by heating by the heating element.

For example, JP-A-5-146683 discloses a catalyst layer formed on a surface of a substrate by using zeolite and active alumina serving as an adsorbent as carriers and supporting a platinum group metal serving as a catalyst on the carrier. An air purification catalyst structure in which a heating element is disposed on the back side of a substrate is described. In this method, odor components in the room are adsorbed by zeolite and activated alumina, and when the adsorption capacity is near the limit, the odor components are oxidized and decomposed by heating the catalyst layer to regenerate the odor components. .

[0004]

However, the conventional catalyst structure for air purification uses an adsorbent / catalyst composed of an adsorbent and a catalyst in a state where the odor component is adsorbed by a heating element. Since it is heated, it is not suitable for use in a space where the temperature is controlled, for example, in a cooled room. That is, the adsorption / catalyst body is heated during cooling, so that the heating efficiency is poor, the temperature cannot be raised quickly, and the cooling and heating are performed at the same time. Loss increases. On the other hand, if the surface area of the adsorption / catalyst body is reduced to reduce the above energy loss, it becomes impossible to secure the required deodorizing ability.

[0005]

In order to solve the above-mentioned problems, the present inventor has proposed an adsorbent for adsorbing odorous or harmful components in air by an adsorbent, and a regenerating unit for regenerating the adsorbent by heating. And the adsorbent is moved between the adsorbing section and the regenerating section to improve the heating efficiency and reduce energy loss even when the adsorbing area of the adsorbent is increased. It has been found that the present invention can be performed, and the present invention has been completed.

That is, the air purifying catalyst structure according to the invention of the present application comprises an adsorbing plate (8) carrying an adsorbent for adsorbing odorous or harmful components in the air, and the adsorbing plate (8). A rotation driving means (9) for rotating the center of rotation at a center of rotation, and a part of the adsorbing surface of the adsorbing plate (8) covered for regeneration of the adsorbent, and the remaining part being an odorous or harmful component in air. (8) exposed for adsorption of
And a cover (11) covered on the suction plate (8) so as to allow the rotation of the suction plate (8). The cover (11) is rotated into the suction plate (8) or the cover (11). A heating element (1) that heats the adsorption surface for regeneration of the adsorbent
5) and a catalyst (16) for decomposing odorous or harmful components adsorbed by the adsorbent.

The odor components include, for example, ammonia, acetaldehyde, trimethylamine, methyl mercaptan, hydrogen sulfide, and the like.
O, NOx (nitrogen oxide), SOx (sulfur oxide) and the like. Further, in this specification, the "odor component or harmful component", when only one of them is targeted, when targeting any one of multiple types,
And the case where both odor components and harmful substances are targeted. That is, “or” here means that at least one of them is targeted.

In the case of the present invention, by exposing the portion of the adsorbing plate (8) exposed from the cover (11) to air, odor components or harmful components in the air are adsorbed by the adsorbent in the exposed portion, The air can be purified. on the other hand,
The portion of the adsorbing plate (8) covered by the cover (11) is heated by a heating element to desorb odorous or harmful components from the adsorbent of the portion and regenerate the adsorbent. The deodorized odor component or harmful component is decomposed by using a catalyst, so that it can be prevented from leaking from the cover (11).

That is, the suction plate (8) is covered with the cover (11).
Is divided into a part for adsorbing the odor component or harmful component in the air to the adsorbent and a portion for regenerating the adsorbent. When the adsorbent is regenerated, the odor component or the harmful component of the adsorption plate (8) is used. There is no need to wastefully heat the part exposed to the air for the adsorption of water, and the heating efficiency for regeneration increases. In addition, since it is not necessary to heat the part of the suction plate (8) exposed to air, even if the suction surface of the part exposed to air is widened, there is no problem of heat energy loss.
The adsorption capacity can be improved.

In addition, the regeneration of a part of the suction plate (8) and the adsorption of the odor component or the harmful component by the remaining portion can be performed simultaneously and in parallel, and the suction plate (8) is rotated by the rotation driving means (9). It can be used continuously by rotating it by a predetermined angle at regular intervals.

The suction plate (8) can be formed in a disk shape, in which case the cover (1)
Regarding 1), opposing front and rear fan-shaped portions which spread in a fan shape from the center side of the suction plate (8) to the periphery so as to cover a part of the front and rear suction surfaces of the suction plate (8);
What is necessary is just to provide a peripheral wall part which connects the front ends of both fan-shaped parts and covers a part of the peripheral surface of the suction plate (8).

As the adsorbent, for example, zeolite, silica gel, activated alumina, activated carbon fiber and the like can be used. As the catalyst, for example, activated alumina, ceria,
Ag, Cu, Pd, Pt, M on one or more carriers selected from zirconia, titania, silica, zinc oxide, lanthanum oxide, praseodymium oxide, zeolite, activated carbon and the like.
It can be constituted by supporting at least one selected from n, Ni, Co, Zn and the like.

The catalyst may be provided on the adsorbing plate (8) or on the inner wall surface of the cover (11). When the catalyst is provided on the adsorbing plate (8), the adsorbent and the catalyst are alternately arranged on concentric circles on the adsorbing plate (8), or are arranged so as to appear alternately in the circumferential direction.
Both may be arranged in a layered form or a mixture of both may be provided. Further, an adsorbent may be used as a carrier to carry the above metal catalyst component such as Ag.

Regarding the heating element, the cover (1)
It can be provided on the inner wall surface of 1), or can be provided on the suction plate (8). When the heating element is provided on the suction plate (8), a plurality of heating wires independent of each other are provided radially around the center of the suction plate (8), and only the heating wire rotated and moved into the cover (11). The cover (11) may be provided with an energizing connection terminal that is selectively connected to a terminal of each heating wire so as to be energized.

Heating during regeneration of the adsorbent generally acts to desorb odorous or harmful components from the adsorbent, and activates the catalyst to accelerate the decomposition of the odorous or harmful components. However, when the adsorbent and the catalyst are mixed and used, or when the adsorbent is used as a carrier and the catalyst component is carried on the adsorbent, the decomposition of the odor component or harmful component by the catalyst proceeds on the adsorbent. I do.

The suction plate (8) can be provided with air permeability so that air can pass through the suction plate (8). Of course, the suction plate (8) may be made impermeable so that air flows around it.

[0017]

Therefore, according to the invention of this application, the suction plate (8) carrying the adsorbent is rotated by the rotation driving means, and covers a part of the suction surface of the suction plate (8). A heating element for providing a cover (11) and heating the adsorbing surface rotated in the cover (11) for regeneration of the adsorbent in the adsorbing plate (8) or the cover (11);
Since a catalyst for decomposing odorous or harmful components adsorbed by the adsorbent is provided, a portion of the adsorbent plate (8) exposed to air for air purification is regenerated when the adsorbent is regenerated. The need for heating is eliminated, the heating efficiency for the regeneration is increased, and the adsorbing surface can be widened to improve the adsorbing ability while avoiding thermal energy loss.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

<Embodiment 1> This embodiment is shown in FIGS. In FIG. 1, reference numeral 1 denotes an air purifier, which is provided with an air flow path (2) for taking in indoor air, adsorbing and removing odorous or harmful components, and blowing out the purified air. The air inlet (3) of the air flow path (2) opens to the front of the air purifier (1), and the air outlet (4) opens to the rear of the air purifier. The air flow path (2) is provided with a pre-filter (pre-filter) (5), a catalyst structure (6), and a blower fan (7) in this order from the upstream side.

The pre-filter (5) is for removing suspended substances in indoor air, and is formed of a fine mesh, a nonwoven fabric, or the like.

The catalyst structure (6) includes a disk-shaped adsorption plate (8) for adsorbing odorous or harmful components in the air, and a motor (9) with a speed reducer for driving the adsorption plate (8) to rotate. And a cover (11) that covers a part of the suction plate (8). The adsorbing plate (8) is formed by solidifying an adsorbent such as zeolite with a binder into a disk shape, and has air permeability through which air passes back and forth. The motor (9) is supported by the bracket (12) on the upper wall of the air flow path (2), and the center of the suction plate (8) is connected to the output shaft (13).

As shown in FIGS. 2 and 3, the cover (11) covers a part of the front surface and a part of the rear surface of the suction plate (8) from the center to the periphery of the suction plate (8). A cross-section comprising a front and rear opposing quarter-circular fan-shaped part that fan-shapedly spreads toward each other, and a peripheral wall part that connects the tips of both fan-shaped parts and covers a part of the peripheral surface of the suction plate (8). It is U-shaped and is supported by the upper wall of the air flow path (2). A heat insulating material (14) is provided on the inner wall surface of the cover (11). The heating element (1) is placed inside the cover (11).
5) and a catalyst plate (16) are provided.

The heating element (15) is formed in a fan-shaped plate following the sector of the cover (11), generates heat when energized, and is provided along the inner surface of the sector of the cover (11). Have been. The catalyst plate (16) has a rectangular substrate on which a catalyst (a metal catalyst component such as Ag is supported on a base material such as activated alumina) is supported, and is provided inside the heating element (15). Is provided.

Therefore, when the blower fan 7 is driven,
The room air is sucked through the air inlet (3) of the air flow path (2), and the floating components are removed by the pre-filter (5) and reach the adsorbing plate (8). Then, the odor component or the harmful component in the air is removed from the cover (11) of the adsorption plate (8).
The air that has been adsorbed and removed by the adsorbent in the portion exposed from the air and is cleaned from the air outlet (4) is blown back into the room.

On the other hand, the cover (11) of the suction plate (8)
Is heated by the heat generated by the operation of the heating element (15). Thus, the adsorbent at the site is regenerated by removing odorous components or harmful components. Catalyst plate (1
6) is also heated by the heating element (15) to exhibit its activity, and the odorous or harmful components desorbed from the adsorbent are decomposed on the catalyst plate (16). Since the heating of the suction plate (8) is performed in the cover (11), the heat is less likely to leak to the air flow path (2), and the heating efficiency is increased. Further, since the decomposition of the odor component or the harmful component by the catalyst is also performed in the cover (11), the odor component or the harmful component is prevented from leaking into the air flow path (2).

The blower fan (7) and the heating element (15)
Is operated, and the adsorbing plate (8) is rotated by 90 degrees at regular time intervals by the motor (9), thereby regenerating the adsorbent of the adsorbing plate (8) while regenerating the adsorbent. The air flowing into the air flow path (2) can be purified using the agent.

<Embodiment 2> In this embodiment, only the main parts are shown in FIGS. That is, the center side of the sector on the rear side of the cover (11) is connected to the peripheral surface of the motor (9),
The center of the front sector is connected to the bearing (17). The heating element (15), the catalyst plate (16) and the heat insulating material (not shown) are the same as in the first embodiment.

Therefore, in the case of this embodiment, the suction plate (8),
Motor with reduction gear (9), cover (11), heating element (1
5) Since the catalyst plate (16), the heat insulating material, and the bearing (17) can be handled as one integrated component,
Assembly to the air purifier becomes easy.

Each of the above embodiments relates to an air purifier for purifying indoor air.
The air purification catalyst structure according to the present invention is incorporated into an air conditioner (for example, a cooler) to deodorize indoor air and to adsorb and decompose gaseous harmful substances generated in chemical factories and the like. In particular, the present invention can be used.

[Brief description of the drawings]

FIG. 1 is a sectional view of an air purifier according to a first embodiment.

FIG. 2 is a front view of a catalyst structure.

FIG. 3 is a sectional view of a cover and an internal member thereof.

FIG. 4 is a side view of a catalyst structure according to a second embodiment.

FIG. 5 is a rear view of the catalyst structure.

FIG. 6 is a front view of the catalyst structure in which an adsorption plate is omitted.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 air purifier 2 air flow path 3 air inlet 4 air outlet 5 pre-filter 6 catalyst structure 7 blower fan 8 suction plate 9 motor (rotation driving means) 11 cover 12 bracket 13 output shaft 14 heat insulator 15 heat generator 16 Catalyst plate 17 Bearing

Claims (4)

[Claims] 1. An adsorption plate (8) carrying an adsorbent for adsorbing odorous or harmful components in the air, and a rotation drive means (22) for rotating the adsorption plate (8) with its center of rotation as its center. 9) and a part of the adsorbing surface of the adsorbing plate (8) is covered for regeneration of the adsorbent, and the rest is exposed for adsorbing odorous or harmful components in the air. And a cover (11) covered on the suction plate (8) so as to allow the rotation of the suction plate (8). The cover (11) is rotated into the suction plate (8) or the cover (11). A heating element (15) for heating the adsorption surface for regeneration of the adsorbent; and a catalyst (1) for decomposing odorous or harmful components adsorbed on the adsorbent.
(6) An air purification catalyst structure, characterized in that: 2. The air-purifying catalyst structure according to claim 1, wherein the adsorbing plate (8) is formed in a disk shape, and the cover (11) is provided before and after the adsorbing plate (8). The front and rear opposing fan-shaped portions that spread in a fan shape from the center side to the periphery of the suction plate (8) so as to cover a part of the suction surface of the suction plate are connected to the suction plate (8). 8) A catalyst structure for air purification, comprising: a peripheral wall portion that covers a part of the peripheral surface of 8). 3. The air purifying catalyst structure according to claim 1, wherein the heating element (15) is provided on an inner wall surface of the cover (11). Structure. 4. The air purifying catalyst structure according to claim 1, wherein the catalytic body (16) is provided on an inner wall surface of the cover (11). Structure.