JPH1076133A - Deodorizing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deodorizing device high in a cooling efficiency of a rotor and excellent in an adsorption efficiency. SOLUTION: The honeycomb like rotor 1 constituted so as to consist essentially of an adsorbent is rotatably driven around the central axis, the rotational passing zone of the rotor 1 is divided at least into a treating zone la, a regenerating zone 1c and a cooling zone 1b in this order and treating air is passed through the rotor 1 to remove a malodor component in the treating zone 1a. The regenerating air circulates in a circulation passage (pipe line 9), is heated to high temp. and heats the rotor 1 to desorb the malodor component and regenerate the rotor 1. Outdoor air is introduced into the cooling zone 1b and the air after cooled is supplied to the circulation passage for the regenerating air. A part of the regenerating air is picked up from the circulation passage and introduced into a discharging pipe line 7 for the treated air. Since the outdoor air is used to cool the rotor 1, the cooling efficiency of the rotor 1 is increased. And since the treating air, in which any thing is not incorporated, is kept low in the temp., the high adsorption efficiency in the rotor 1 is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing apparatus for removing various malodorous substances, and more particularly, to a method in which a gas to be treated and a regenerated gas are passed through a rotor while the honeycomb-shaped rotor is being driven to rotate. The present invention relates to a deodorizer for decomposing and removing malodorous components.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing a conventional deodorizing apparatus (Japanese Patent Laid-Open No. 7-256048). The deodorizing rotor 1 has a cylindrical shape, and is rotatably supported around its central axis. The rotor 1 is driven to rotate in one direction by an appropriate driving means. The front and back surfaces of the rotor 1 face rooms divided into three by partitions, and a predetermined gas can be passed through these three zones in the thickness direction of the rotor 1 without mixing with other zones. I can do it. As shown in FIG. 1, this zone includes an adsorption treatment zone 1a, a cooling zone 1b,
And a reproduction zone 1c.
It has dimensions of 5 °, 30 ° and 45 °.

The deodorizing device 1 is obtained by mixing a hydrophobic zeolite as an adsorbent and an oxidation catalyst as a catalyst, and supporting the mixture on a honeycomb-shaped ceramic base material. This oxidation catalyst includes iron, manganese, copper,
At least one component selected from the group consisting of zinc and nickel. The rotor 1 of the present apparatus is, for example, Cu
O: An oxidation catalyst containing 15 to 30% and MnO: 40 to 60% as main components. Further, the adsorbent is not limited to hydrophobic zeolite, and various substances such as activated carbon can be used. Further, the catalyst is not limited to an oxidation catalyst, and a noble metal catalyst such as platinum and palladium can be used.

The air to be deodorized is introduced into the processing zone 1 a of the rotor 1 through the pipe 6 after the dust is removed by the filter 2. This processing air is sent into the rotor 1 by the blower 3 provided in the pipe 6. The air that has exited the processing zone 1a is discharged to the outside via the pipe 7.

[0005] A part of the odorless air after the deodorization treatment discharged to the pipe 7 is passed through the pipe 8 to the cooling zone 1 of the rotor 1.
b.

On the other hand, the regeneration air is circulated through a pipe 9 in the regeneration zone 1c of the rotor 1, and is driven by a blower 4 provided in the pipe 9 so that the regeneration air is supplied to the regeneration zone of the rotor 1. 1c is circulated. A regeneration air heater 5 is disposed on the upstream side of the regeneration zone lc of the pipe 9. The regeneration air is heated to about 350 ° C. by the heater 5 and then introduced into the regeneration zone lc of the rotor 1. You. Thus, the air after passing through the cooling zone 1b is supplied to the recirculating air circulation pipe 9 via the pipe 9a. A pipe 10 is connected to the pipe 9 at a position downstream of the blower 4, and a part of the regenerated air is supplied to the pipe 1.
0 and is mixed with the process air before passing through the rotor.

Next, the operation of the conventional deodorizing device having the above-described structure will be described. The processing air containing the offensive odor gas is sent to the processing zone 1a of the deodorizing rotor 1, and the offensive odor component is adsorbed and removed by an adsorbent portion made of a hydrophobic zeolite constituting a part of the rotor 1. The air after passing through the processing zone is discharged as purified air.

[0008] Then, the rotor 1 that has absorbed the offensive odor component rotates to the regeneration zone lc. Then, in this regeneration zone lc, the malodorous component adsorbed on the rotor 1 becomes
By heating the rotor 1 with high-temperature air heated by the regeneration heater 5, the rotor 1 is detached from the adsorbent portion of the rotor 1. Regenerated air containing a high concentration of malodorous components desorbed from the rotor 1 circulates through the regeneration path via the pipe 9 and is introduced into the heater 5. Then, the regeneration air containing the malodorous component at a high concentration passes through the rotor 1 at a high temperature in the regeneration zone lc, and the malodorous component is oxidized and decomposed by the catalyst portion of the rotor 1.

Next, the rotor 1 heated to a high temperature in the regeneration zone 1c rotates into the cooling zone 1b. The rotor 1 is cooled in the cooling zone 1b by receiving the passage of the clean air after the adsorption process. As a result, the ability of the rotor 1 to absorb the malodorous component is restored, and the rotor 1 is sequentially subjected to the adsorption process in the processing zone 1a.

In the present apparatus, the heat after cooling is recovered from the cooled air to which the heat of the rotor is transferred without discharging the cooled air to the outside air or returning it to the processing inlet air. The cooled air is introduced into the pipe 9 of the circulation regeneration air path. Then, substantially the same amount of air as the cooled air introduced into the pipe 9 is extracted from the pipe 9, returned to the upstream side of the processing blower 3 via the pipe 10, and mixed with the air before the processing.

As described above, according to this embodiment, a gas containing a malodorous component can be deodorized with high efficiency.
That is, even when a gas containing aromatic hydrocarbons such as toluene, xylene and phenol is deodorized, the adsorbed substance is decomposed by the catalyst in the regeneration zone 1c, so that it remains on the rotor due to thermogravimetry. And the life of the rotor is not shortened. In addition, regardless of the form in which the catalyst is added to the adsorbent, the catalyst is constituted by a honeycomb-shaped rotor, so that its specific surface area is large and a substance having a strong odor can be sufficiently deodorized. Furthermore,
Since the deodorizing treatment is performed only by the rotor 1, the apparatus does not become large and the running cost is low.

[0012]

However, this conventional deodorizing device has a disadvantage that the cooling efficiency of the rotor 1 is low. That is, the cooling gas supplied to the cooling zone 1b is air after the adsorption process after passing through the processing zone 1a. Since the adsorption of the deodorizing component by the rotor is an exothermic reaction, the rotor 1 generates heat in the adsorption processing zone 1a, and the temperature of the air after the processing, which has exited from the adsorption processing zone 1a, increases as compared with that before the processing. ing. Therefore, the cooling air supplied to the cooling zone 1b is relatively high in temperature, the cooling efficiency is low, and the adsorption efficiency in the processing zone 1a in the next step is low.

Further, in the conventional deodorizing device, a part of the regenerated air circulating in the regenerating zone 1c is supplied to the processing zone 1a.
Will be returned to the entrance side. The regenerated air is heated to about 250 ° C. by the heater 5 and then cooled by passing through the regenerating zone. However, the temperature of the regenerated air is relatively high. And mixed with the air to be treated.

The air to be adsorbed to be adsorbed is at a high temperature, and has a drawback that the efficiency of adsorbing malodorous components in the treatment zone 1a is low.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a deodorizing device having high cooling efficiency of a rotor and excellent adsorption efficiency.

[0016]

According to the present invention, there is provided a deodorizing apparatus comprising: a honeycomb-shaped rotor having an adsorbent as a main component; driving means for rotating the rotor about its central axis; Division means for dividing the rotation passage area into at least a processing zone, a regeneration zone and a cooling zone in this order, processing air introduction means for passing processing air to the rotor in the processing zone, and supplying outside air as cooling air to the cooling zone. Cooling air introduction means for introduction, regeneration air supply means for circulating and supplying regeneration air to the regeneration zone, heating means provided in a circulation path of the regeneration air for heating the regeneration air, The air after passing through the cooling zone is introduced into the circulation path of the working air, and air corresponding to the introduced air is supplied from the circulation path to the processing zone outlet side. And having a means for discharging.

Another deodorizing device according to the present invention is a honeycomb-shaped rotor composed mainly of an adsorbent, driving means for rotating this rotor around its central axis, and a rotating passage area of the rotor. A dividing means for dividing at least a processing zone, a regeneration zone and a cooling zone in this order, a processing air introducing means for passing processing air through the rotor in the processing zone, and a part of the processing air as cooling air in the cooling zone. Cooling air introduction means for introduction, regeneration air supply means for circulating and supplying regeneration air to the regeneration zone, heating means provided in a circulation path of the regeneration air for heating the regeneration air, While introducing the air after passing through the cooling zone into the circulation path of the working air, air corresponding to the introduced air is supplied from the circulation path to the processing zone outlet side. And having means for exiting, the.

In this deodorizing apparatus, a catalyst tank containing a material mainly composed of an oxidation catalyst can be provided in the circulation path of the regeneration air.

In the present invention, outside air or a part of the processing air is introduced as cooling air for cooling the rotor in the cooling zone. Unlike the air treated in the deodorizer, the outside air or the treated air is at a low temperature, so that the cooling efficiency is extremely high. In addition, the processing air is not introduced into the rotor in the processing zone after the air processed in the deodorizing device is mixed, as in the conventional case. Remains cold. For this reason, the adsorption efficiency of the malodorous component is extremely high.

[0020]

Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing a deodorizing apparatus according to a first embodiment of the present invention. 1, the same components as those in FIG. 3 are denoted by the same reference numerals, and detailed description thereof will be omitted. The first embodiment differs from the conventional deodorizer shown in FIG. 3 in that the cooling gas introduced into the cooling zone 1b is outside air. Another point is that a part of the regeneration gas circulating in the regeneration zone 1c is returned to the air discharge pipe 7 after the adsorption treatment.

That is, the outside air flows through the pipe 12 through the blower 11.
To the cooling zone 1b of the rotor 1. The post-cooling gas after passing through the cooling zone 1a is returned via the pipe 13 to a position upstream of the blower 4 in the pipe 9 which is a circulation path of the regeneration gas. A pipe 14 for discharging a part of the regenerated gas into the processed air is connected between a position between the blower 4 and the heater 5 in the pipe 9 and the processed air discharging pipe 7. The pipe 8 and the pipe 10 (see FIG. 3) in the prior art are not provided in the apparatus of this embodiment.

In the apparatus of the present embodiment thus configured, the processing air is filtered by the filter 2 and then introduced into the processing zone 1 a of the rotor 1 via the pipe 6 by the blower 3. When the processing air passes through the processing zone 1b, its malodorous components are adsorbed and removed by the rotor 1, and the cleaned air is discharged to the pipe 7. The rotor 1 that has absorbed the malodorous component rotates to the regeneration zone 1c. In the regeneration zone 1c, the regeneration air heated by the heater 5 is circulated and supplied to the rotor 1 by the blower 4 through the pipe 9, and the rotor 1 passes through the high-temperature regeneration air sent through the pipe 9. Receiving and heating to desorb adsorbed components. In this manner, the rotor 1 desorbs the adsorbed odor component and is cleaned,
The odor components after the desorption are discharged to the pipe 9. When the regeneration air passes through the rotor 1 in the regeneration zone 1c, the malodorous component is subjected to an oxidative decomposition action at the catalytic portion of the rotor 1 and is removed. Therefore, some of them are oxidatively decomposed by heat, so that the concentration of the malodorous component in the regenerated air in the pipe 9 does not become high.

The regenerated rotor from which the offensive odor component has been desorbed then rotates into the cooling zone 1b. This cooling zone 1
At b, the rotor 1 receives the flow of outside air. That is, the outside air is cooled by the blower 11 through the pipe 12 to the cooling zone 1b.
After cooling the rotor 1, it is introduced into the pipe 9 via the pipe 13. An amount of regenerated air corresponding to the amount of the cooled air supplied from the cooling zone 1b is extracted from the pipe 9 in the circulation path, and supplied to the pipe 7 via the pipe 14.

Next, after the rotor 1 is cooled by the outside air, it rotates into the processing zone 1a. In this case, since the cooling gas of the rotor 1 is outside air, the temperature is low and the cooling efficiency of the rotor 1 is extremely high. Therefore, the rotor 1 is cooled to a temperature at which the adsorption efficiency is sufficiently high, and the processing zone 1a adsorbs and removes offensive odor components in the processing air with extremely high adsorption efficiency. Also, since nothing is mixed with the processing air supplied to the processing zone 1a, the processing air does not rise in temperature, and therefore, the adsorption efficiency does not decrease. For this reason, this embodiment can remove malodorous components with extremely high efficiency.

Next, a second embodiment of the present invention will be described with reference to FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. In this embodiment, the cooling gas supplied to the cooling zone 1b is a part of the processing air supplied to the processing zone 1a, and the circulation path (piping 9) of the regeneration air exchanges heat with the catalyst 17. A vessel 15 is provided.

That is, in this embodiment, the pipe 19 is branched from the pipe 6, and the pipe 19 is connected to the cooling zone 1b. A gas burner direct-fired heater 16 is provided between the blower 4 and the rotor 1 in the pipe 9 which is a circulation path of the regeneration air. Heated to 350 ° C. Further, a catalyst tank 17 is provided in the pipe 9 between the heater 16 and the rotor 1. The regenerated air after heating is supplied to the catalyst tank 17.
During the passage, the oxidation reaction of the malodorous components in the regenerated air is promoted by the catalyst, the malodorous components are decomposed, and the amount of the malodorous components in the pipe 9 decreases.

The catalyst 17 and the rotor 1 in the pipe 9
And a heat exchanger 15 for performing heat exchange between a position between the blower 4 and the heater 16. After being heated by the heater 16, the heat exchanger 15 transfers the retained heat of the high-temperature regenerated air that has passed through the catalyst tank 17 to the regenerated air before being heated by the heater 16, and the regenerated zone 1 c
The regeneration air immediately before being introduced into the heater 16 is cooled, and the regeneration air immediately before being introduced into the heater 16 is heated. In addition, a pipe 18 serving as a bypass for the heat exchanger 15 is provided between the catalyst tank 17 and the rotor 1 in the pipe 9.
By adjusting the amount of the regenerated air that has passed through the heat exchanger 15 for heat exchange by the heat exchanger 15 and the amount by which the heat exchanger 15 is bypassed by the pipe 18, the regeneration zone 1c
The temperature of the regeneration air to be supplied to is controlled.

Next, the operation of the deodorizing device configured as described above will be described. In the present embodiment, a part of the processing air is introduced as a cooling gas into the cooling zone 1b of the rotor 1, and the cooled air is supplied to a pipe 9 serving as a circulation path of the regeneration air.
Will be introduced.

An amount of regenerated air corresponding to the introduced amount is supplied to the pipe 1.
The air is extracted from the pipe 9 via the pipe 4 and discharged to the pipe 7 of the treated air. In the pipe 9, the regenerated air heated by the heater 16 first promotes the oxidative decomposition of the malodorous component by the catalyst in the catalyst tank 17, the malodorous component is removed, and the concentration of the malodorous component decreases. Next, part of the regenerated air is cooled by passing through the heat exchanger 15, and the remainder is supplied to the downstream side of the heat exchanger 15 via the bypass pipe 18 as it is. Then, the regenerated air merges again and the rotor 1
Is supplied to the reproduction zone 1c. By adjusting the amount of the regeneration air passing through the heat exchanger 15 and the amount of the regeneration air passing through the bypass pipe 18, the temperature of the regeneration air supplied to the regeneration zone 1c is adjusted.

In the present embodiment, the cooling air supplied to the cooling zone 1b is a part of the processing air.
Has high cooling efficiency.

Since nothing is mixed with the processing air supplied to the processing zone 1a, the temperature of the processing air is low, and
The deodorizing efficiency of the malodorous component in the processing zone 1a of the rotor 1 is high, and the malodorous component can be removed with high efficiency.

In this embodiment, since the oxidative decomposition of the regenerated air is promoted by the catalyst provided in the circulation path, the concentration of the malodorous component in the circulation path can be further reduced, and the air after treatment is discharged to the pipe 7. The amount of offensive odor components in the regeneration air can be further reduced.

Further, in this embodiment, since the temperature of the regeneration air is adjusted by the heat exchanger 15 and the bypass pipe 18, the regeneration temperature can be adjusted to an appropriate value and the regeneration efficiency is high.

[0034]

Next, a description will be given of the result of actually assembling a deodorizing apparatus according to the present embodiment and determining the efficiency of removing the offensive odor component.

First, with respect to the embodiment shown in FIG. 1, the removal efficiencies were determined for the type having a processing air volume of 60 m ³ / min and the type having a processing air volume of 30 m ³ / min. The conditions and results are shown below.

[0036]

Next, with respect to the embodiment shown in FIG. 2, the removal efficiency was determined for a type having a processing air flow rate of 70 m ³ / min. The conditions and results are shown below. As described above, in the present embodiment, the removal efficiencies of the malodorous components are as high as 87.5%, 93.8% and 80.0%.

[0038]

According to the present invention, the outside air or the processing air is used as the cooling gas, and the regeneration air extracted from the circulation path of the regeneration gas is returned to the air piping after the processing, so that the rotor can be highly efficient. And the temperature of the processing air is low, so that the malodorous components can be desorbed and removed from the processing air with high efficiency. Thus, according to the present invention,
The malodorous component can be removed with high efficiency.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a deodorizing device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a deodorizing apparatus according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a conventional deodorizing device.

[Explanation of symbols]

 1; rotor 1a; treatment zone 1b; cooling zone 1c; regeneration zone 2; filters 3, 4, 11; blowers 5, 16; heaters 6, 7, 9, 9, 12, 13, 14, 18, pipes 15;

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B01J 35/04 301

Claims (3)

[Claims] 1. A honeycomb-shaped rotor comprising an adsorbent as a main component, driving means for driving the rotor to rotate around its central axis, and a rotation passage area of the rotor at least in a processing zone, a regeneration zone, and a cooling zone. Dividing means for dividing the processing zone into zones in this order, processing air introducing means for passing processing air through the rotor in the processing zone, cooling air introducing means for introducing outside air as cooling air to the cooling zone, and Regeneration air supply means for circulating and supplying regeneration air, heating means provided on the regeneration air circulation path for heating the regeneration air, and after passing through the cooling zone on the regeneration air circulation path. Means for introducing air and discharging air corresponding to the introduced air from the circulation path to the processing zone outlet side. Deodorizing device. 2. A honeycomb-shaped rotor comprising an adsorbent as a main component, driving means for driving the rotor to rotate around its central axis, and a rotation passage area of the rotor at least in a processing zone, a regeneration zone, and a cooling zone. Dividing means for dividing the processing air into zones in this order, processing air introducing means for passing processing air through the rotor in the processing zone, cooling air introducing means for introducing a part of the processing air to the cooling zone as cooling air, Regeneration air supply means for circulating and supplying regeneration air to the regeneration zone; heating means provided in the regeneration air circulation path for heating the regeneration air; and cooling for the regeneration air circulation path. Means for introducing air after passing through the zone, and discharging air corresponding to the introduced air from the circulation path to the processing zone outlet side. A deodorizing device characterized by the following. 3. The deodorizing apparatus according to claim 1, further comprising a catalyst tank provided in a circulation path of the regeneration air and containing a material containing an oxidation catalyst as a main component.