JPH08112512A - Gas treating device - Google Patents

Abstract

PURPOSE: To miniaturize and simplify the entire equipment constitution in a gas treating device. CONSTITUTION: In a gas treating device which is provided with an adsorption zone (a) through which a gas G to be treated is passed and a desorption zone (b) through which a high temperature regenerating gas H is passed, and which has such constitution that an adsorption process where an adsorption means (m) is positioned in the adsorption zone (a) to subject a material to be adsorbed in the gas G to be treated to adsorptive action and a desorption process where the adsorption means (m) which has undergone adsorptive action is positioned in a desorption zone (b) to regenerate it by desorbing the adsorbed material with high temperature regenerating gas H are performed in the same time, a branching flow passage (x) for transferring a part of the treated gas G' which has passed through the adsorption zone (a) to the desorption zone (b) is installed, and a heating means HT for heating the treated gas G' transferred to the adsorption zone (b) by the branching flow passage (x) is installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas treatment device used for separating and removing a paint solvent component from a paint solvent-containing air discharged from a coating facility. A desorption zone for ventilating the high-temperature regeneration gas is provided, and an adsorption step for adsorbing an adsorption target in the gas to be treated by adsorbing means positioned in the adsorption zone, and an adsorption means after adsorption has been positioned in the desorption zone. The present invention relates to a gas treatment device configured to concurrently perform a desorption process of regenerating an adsorbate by desorption of a high temperature regeneration gas.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional structure of a gas treatment device as described above, where R is a ventilation rotor equipped with an adsorbent m'having activated carbon or the like as a main material, and the rotation range of this ventilation rotor R is
To divide into an adsorption area a through which the gas to be treated G is ventilated and a desorption area b through which the high-temperature regeneration gas H is ventilated, and rotate the ventilation rotor R while straddling the adsorption area a and the desorption area b. As a result, in the adsorption region a, the adsorbent m ′ is caused to adsorb to the adsorption target (that is, the removal target) in the gas to be treated G,
In parallel with this, in the desorption zone b, the adsorbent m ′ that has adsorbed in the previous passage through the adsorption zone is regenerated by desorbing the adsorbate with the high temperature regeneration gas H.

Then, the gas to be treated G is supplied to the adsorption area a through the air passage gi, and the entire amount of the treated gas G ′ which has passed through the adsorption area b is exhausted outdoors through the air passage go. On the other hand, in the desorption area b, on the other hand, in the desorption area b, the air (outside air) OA taken from the outside through the outside air introduction air passage oi is purified by the filter FI and heated by the heating means HT, This heated air is supplied as the high-temperature regeneration gas H to the desorption zone b through the air passage hi, and
The desorbed gas H ′ that has passed through the desorption area b is sent to the post-treatment process such as incineration treatment via the air passage ho.

[0004]

However, in the conventional apparatus as described above, it is prevented that the adsorbent ventilation portion of the ventilation rotor R is clogged with dust or the like contained in the high temperature regeneration gas H and the processing function is deteriorated. Therefore, a filter FI for the introduced outside air OA is required, and a facility for a duct as the outside air introduction air passage oi is also required. Therefore, there is a problem that the entire device configuration becomes large and complicated and the device cost increases. .

Further, when the treated gas G'is discharged to the outside and the desorbed gas H'is also subjected to post-treatment and then discharged to the outside, the amount of exhaust to the outside as a whole becomes large. Therefore, there is a problem that the neighborhood is affected, and further, there is a problem that the device heat loss is large due to heat dissipation in the air passage hi that sends the high temperature regeneration gas H from the heating means HT to the desorption zone b.

In view of the above circumstances, the object of the present invention is as follows.

A first object of the present invention is to rationalize the supply structure of the gas for high temperature regeneration, thereby making the whole device structure compact and simple, and to treat the treated gas and the desorbed gas. In both cases, when exhausting to the outdoors, it is a point to reduce the outdoor exhaust volume.

A second object of the present invention is to effectively suppress the heat loss of the apparatus and to make the apparatus structure compact.

[0009]

[Means for Solving the Problems]

[First Characteristic Configuration] A first characteristic configuration of the present invention is provided with an adsorption region through which a gas to be treated is ventilated and a desorption region through which a gas for high temperature regeneration is ventilated, and adsorption means is positioned in the adsorption region to be treated. In an apparatus configuration in which an adsorption process for adsorbing an object to be adsorbed in a gas and a desorption process for regenerating by adsorbing the adsorbent by a high-temperature regenerating gas by adsorbing the adsorbing means after the adsorption has been performed in the desorption region are performed in parallel. It is to provide a branching channel for sending a part of the treated gas which has passed through the adsorption zone to the desorption zone, and a heating means for heating the treated gas fed to the desorption zone through the branching channel.

[Second Characteristic Configuration] A second characteristic structure of the present invention is to specify a preferable structure in the implementation of the first characteristic structure, and is an inside of an apparatus casing having the adsorption area and the desorption area. In addition, the diversion channel and the heating means are arranged.

[0011]

[Action]

[Operation of First Characteristic Configuration] In the first characteristic configuration, in the parallel execution of the adsorption process and the desorption process, a part of the treated gas that has passed through the adsorption region is diverted and heated by the heating means, and this heated diverted gas is used. Is sent to the desorption area through the branching channel as high temperature regeneration gas.

[Operation of Second Characteristic Configuration] In the second characteristic configuration, by arranging the above-mentioned shunt channel and heating means inside the casing of the apparatus that houses the adsorption region and the desorption region,
The heat shielding by the device casing suppresses the heat radiation from the shunt channel to the outside of the device, and the device configuration is made compact as compared with the case where the shunt channel and the heating means are separately provided outside the device casing.

[0013]

【The invention's effect】

[Effect of First Characteristic Configuration] According to the first characteristic configuration of the present invention, a part of the treated gas purified by the adsorption treatment in the adsorption region is heated and sent to the desorption region as a gas for high temperature regeneration. As a result, a separate purification process for the high-temperature regeneration gas is not required, and it is possible to eliminate the need for a filter such as the conventional device described above, and the duct facility as an outside air introduction path is also unnecessary. Can be downsized and simplified, and the device cost can be reduced.

Further, even if the heated air obtained by heating the introduced outside air is used as a part of the high temperature regeneration gas,
Compared with the conventional device, the equipped filter can be made smaller and
The duct for the outside air introduction path only needs to have a small diameter, which also makes it possible to reduce the size and simplification of the overall device configuration and reduce the device cost.

Moreover, when both the treated gas and the desorbed gas are discharged outdoors, a part of the treated gas is used as a high-temperature regeneration gas, so that the total exhaust amount to the outdoors is larger than that of the conventional device. Can be reduced in quantity, which can mitigate the impact on neighbors.

[Effect of Second Characteristic Configuration] According to the second characteristic configuration of the present invention, the heat loss of the device due to heat radiation to the outside of the device can be suppressed, the operating cost can be reduced, and energy saving can be achieved. Since the device configuration can be made compact with a small external air passage, the installability can be improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 show an embodiment in which R is a ventilation rotor in which adsorption cassettes z each having a bottomed cylindrical shape are arranged side by side in the circumferential direction and are installed in an apparatus casing K, and a peripheral wall portion of the adsorption cassette z. As the adsorption means, a breathable mat-like adsorbent m filled with fibrous or granular activated carbon is attached.

The rotation region of the ventilation rotor R is divided into an adsorption region a, a desorption region b, and two extraction regions c located at the boundary between the adsorption region a and the desorption region b. The desorption side exhaust air passage ho is communicated with the desorption area b on one end surface side, and the short length air passage x is communicated with the desorption area b on the other end surface side of the ventilation rotor R, and each extraction area c A circulation air passage s is connected to the.

The internal space of the apparatus casing K is divided into a space portion ki located on one end surface side of the ventilation rotor R and a space portion ko located on the other end surface side, and a space located on one end surface side of the ventilation rotor R. The suction side air supply passage gi is communicated with the portion ki, and the space portion k located on the other end surface side of the ventilation rotor R
The suction side exhaust air passage go is communicated with o.

The other end of the circulation air passage s is communicated with the suction side air supply air passage gi, and the other end of the short air passage x is located in the casing space portion ko located on the other end surface side of the ventilation rotor R.
Further, a heater HT such as an electric heater or a steam heater is interposed in the short air passage x.

That is, in the above configuration, while the ventilation rotor R is rotated, the gas to be treated G is supplied to the casing inner space portion ki on the one end surface side of the rotor by the fan fa through the adsorption side supply air passage gi. The gas to be processed G is supplied to the adsorption zone a and the adsorption cassette z located in the adsorption zone a
The mat-like adsorbent m is ventilated, and in the ventilation process, the adsorption object in the gas to be treated G is adsorbed to the mat-like adsorbent m to purify the gas to be treated G.

The treated gas G ', which has passed through the adsorption zone a and is delivered to the casing inner space portion ko on the other end surface side of the rotor, is
A part of it is supplied to the desorption zone b after being heated by the heater HT via the short air passage x, whereby the heated gas is used as the high temperature regeneration gas H in the adsorption cassette z located in the desorption zone b. Of the mat-shaped adsorbent m (that is, the mat-shaped adsorbent m that has adsorbed during the passage of the adsorption region by the rotation of the rotor) of the mat-shaped adsorbent m of FIG.
The adsorbed substance in 1) is desorbed to regenerate the mat-shaped adsorbent m.

That is, while the adsorption cassettes z are alternately positioned in the adsorption region a and the desorption region b by the rotation of the ventilation rotor R, the purification process and the desorption region b of the gas to be treated G by the adsorption in the adsorption region a are performed. The regeneration treatment of the mat-like adsorbent m by desorption in step 1 is continuously performed in parallel.

Further, a part of the gas to be processed G supplied to the casing inner space portion ki on the one end face side of the rotor is supplied to each of the gas extraction regions c, and the gas to be processed G is located in each of the gas extraction regions c. It passes through the mat-shaped adsorbent m of the adsorption cassette z,
In the extraction region c, the gas G to be treated is not efficiently purified due to the thermal effect from the adjacent desorption region b which is a high temperature region. In order to do so, the fan fc returns to the suction side air supply air passage gi through the circulation air passage s.

That is, such a bleed region c is provided at both positions adjacent to the desorption region b where the purification process of the gas to be treated G by adsorption is not performed efficiently, and the gas to be treated which has passed through the bleed region c is provided. By subjecting G to reprocessing, the cleanliness of the gas delivered as the treated gas G ′ to the casing internal space ko on the other end surface side of the rotor is increased.

On the other hand, of the treated gas G'passed through the adsorption zone a and sent to the casing inner space ko on the other end face side of the rotor, the remaining gas after being split into the short air passage x is exhausted to the outside. The desorbed gas H ′ (that is, the gas containing the desorbed adsorbate) that has been sent to a predetermined exhaust location through the adsorption-side exhaust air passage go and has passed through the desorption area b is
It is sent to a post-treatment step such as incineration processing by the fan fb through the desorption side exhaust air passage ho, and then sent to a predetermined exhaust location such as exhausting outdoors.

In short, in the present embodiment, the short air passage x constitutes a branch passage for sending a part of the treated gas G ′ that has passed through the adsorption area a to the desorption area b, and is installed in the short air passage x. The heated heater HT constitutes a heating means for heating the treated gas G ′ to be sent to the desorption zone b by the branch channel, and these branch channels and the heating means are device casings containing the adsorption zone a and the desorption zone b. It is arranged inside K.

[Other Embodiments] Next, other embodiments will be listed. (1) As the adsorbing means, instead of adopting the mat-like adsorbent m as described above, various materials and structures such as using a breathable block-shaped body mainly composed of an adsorbent such as activated carbon Can be adopted.

(2) The means for arranging the adsorption means m in the adsorption area a and the means for arranging the adsorption means m adsorbed in the adsorption area a in the desorption area b can have various structures. It is not limited to the rotating rotor R as described above.

(3) In order to carry out the purification treatment of the gas to be treated G by adsorption and the regeneration of the adsorption means m by desorption continuously in parallel, the adsorption means m which has acted in the adsorption zone a as in the above-mentioned embodiment. When the adsorbing means m desorbed the adsorbate in the desorbing area b is transferred to the adsorbing area a as the adsorbing means m is fixed in each of the two ventilation areas, It is also possible to adopt a mode in which these two ventilation areas are reciprocally changed to the adsorption area a and the desorption area b by switching the paths.

(4) Treated gas G'passing through the adsorption zone a
The specific air passage structure of the branch passage for sending a part of the branch passage to the desorption area b can be modified in various ways. In some cases, the branch passage and the heating means are arranged outside the apparatus casing K. Good.

(5) The gas G to be treated is not limited to the paint solvent-containing air discharged from the coating equipment (that is, the paint solvent to be removed is the object to be removed by adsorption), but the gas contained by the adsorbing means m is not limited. As long as it is a gas that can be adsorbed, it is possible to target gases for various applications in various fields.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view showing a device configuration.

FIG. 2 is a sectional view taken along line I-I in FIG.

FIG. 3 is a sectional view taken along line II-II in FIG.

FIG. 4 is a device configuration diagram showing a conventional example.

[Explanation of symbols]

 G gas to be treated a adsorption region H gas for high temperature regeneration b desorption region m adsorption means G'treated gas x shunt channel HT heating means K device casing

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B01D 53/74

Claims (2)

[Claims] 1. An adsorption zone (a) for ventilating a gas to be treated (G) and a desorption zone (b) for ventilating a high temperature regeneration gas (H), wherein an adsorption means (m) is provided in the adsorption zone (m). The adsorption process for adsorbing the adsorption target in the gas to be treated (G) located in a), and the adsorption means (m) that has undergone the adsorption action are in the desorption zone (b).
A gas treatment apparatus configured to perform a desorption process of regenerating the adsorbate by desorption of a high temperature regeneration gas (H) in parallel with the treated gas (G ′) which has passed through the adsorption zone (a). ), And a heating means (HT) for heating the divided flow path (x) for sending a part of the above) to the desorption zone (b) and the treated gas (G ′) sent to the desorption zone (b) by the divided flow path (x). And a gas treatment device provided with. 2. The adsorption area (a) and the desorption area (b)
The gas treatment device according to claim 1, wherein the branch flow passage (x) and the heating means (HT) are arranged inside a device casing (K) in which the above is installed.