JP2999794B2 - Rotary gas processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a first-stage rotating body and a second-stage rotating body that have an adsorbent as a main constituent material and are permeable to a rotating shaft center direction. In the rotation region, an adsorption region through which the gas to be processed passes through the rotation member and a desorption region through which the regeneration gas passes through the rotation member are provided, and the adsorption region of the former rotation member and the adsorption region of the latter rotation member. Are arranged in that order from the upstream side of the air passage in a series of gas air passages to be treated, and the desorption regions of the pre-rotation body and the post-rotation body are respectively arranged in a regeneration gas air passage, and the pre-rotation body and the A rotation mechanism for rotating the latter rotating body is provided, so that the gas to be treated is continuously processed by repeating the adsorption and desorption by rotating over the adsorption area and the desorption area of each of the former rotating body and the latter rotating body. The present invention relates to a gas processing apparatus.

[Conventional technology]

Conventionally, in the rotary gas processing apparatus as described above, the driving mechanism for rotating the first-stage rotator and the second-stage rotator is configured to simply rotate both rotators at the same rotational speed. In the structure disclosed in Japanese Patent Application Laid-Open No. 55-144526, both rotating bodies are integrally rotated by a common rotating shaft.

[Problems to be solved by the invention]

However, considering the adsorption / desorption efficiency of the rotating body, that is, the efficiency of appropriately separating and collecting the substance to be adsorbed in the gas to be treated by the adsorption / desorption, as shown in FIG. 3, the adsorption / desorption efficiency (η) is at a maximum. Is different depending on the concentrations (d) and (d ') of the substance to be adsorbed in the gas to be treated.

On the other hand, in the rotary gas processing apparatus of this type, the adsorption area of the first-stage rotator and the adsorption area of the second-stage rotator are arranged side by side from the air path upstream side and arranged in the gas passage to be treated. Naturally, the concentration of the substance to be adsorbed in the gas to be treated is different from the concentration of the substance to be adsorbed in the gas to be treated that reaches the adsorption area of the latter rotating body after passing through the adsorption area of the preceding rotating body (the exhaust of the painting booth). In the case of a substance to be adsorbed consisting of a plurality of components, such as a paint solvent contained, this concentration change occurs with a change in the component ratio due to the adsorption characteristics of the preceding rotating body.) In spite of the fact that the concentrations of the substances to be adsorbed in the processing gas are different from each other, simply rotating the former rotating body and the latter rotating body at the same rotation speed as in the above-described conventional apparatus requires the former rotating body and the latter rotating body. The biggest absorption and desorption for each of In this regard, the adsorption and desorption functions of the two rotating bodies are maximized, and the separation and collection efficiency of the apparatus as a whole with respect to the substance to be adsorbed in the gas to be treated, in other words, There is still room for improvement in improving the processing performance of the apparatus as a whole for the gas to be processed.

An object of the present invention is to improve the processing performance of the entire apparatus by rationalizing the driving rotation form of the first-stage rotating body and the second-stage rotating body.

[Means for solving the problem]

A first characteristic configuration of the rotary gas processing apparatus according to the present invention is that a main rotor is made of an adsorbent and a front-stage rotary body and a rear-stage rotary body that can be ventilated in the direction of the rotation axis are provided. In the zone, an adsorption zone for passing the gas to be processed through the rotary body and a desorption zone for passing the regeneration gas through the rotary body are provided, and the adsorption zone of the former rotary body and the adsorption zone of the latter rotary body, In that order, arranged in a series of gas passages to be treated, arranged from the upstream side of the air passage, the desorption areas of the pre-rotation body and the post-rotation body are respectively arranged in the regeneration gas air passage, and the pre-rotation body and the post-rotation In a configuration in which a driving mechanism for rotating the body is provided, the driving mechanism is configured to rotate the pre-rotation body and the post-rotation body at predetermined rotation speeds different from each other, and the predetermined rotation speed of the pre-rotation body is Adsorption area of the preceding rotating body The speed at which the adsorption and desorption efficiency of the preceding rotating body is maximized with respect to the concentration of the substance to be adsorbed of the gas to be treated is set, and the predetermined rotational speed of the latter rotating body is set to the adsorption area of the latter rotating body. The speed is set so that the adsorption / desorption efficiency of the subsequent rotating body is maximized with respect to the concentration of the substance to be adsorbed in the gas to be processed, and the operation and effect are as follows.

(Operation)

That is, as described above, the concentration of the substance to be adsorbed in the gas to be treated reaching the adsorption region of the preceding rotating body and the adsorption of the gas to be treated reaching the adsorption region of the latter rotating body after passing through the adsorption region of the preceding rotating body. While the substance concentrations are different from each other, as described above, the rotation speed of the first-stage rotator and the rotation speed of the second-stage rotator are made different from each other, so that the first-stage rotator is exposed to the adsorption region thereof. The pre-rotating body is rotated at a rotational speed that maximizes the adsorption / desorption efficiency of the pre-rotating body with respect to the concentration of the substance to be adsorbed in the processing gas (the initial concentration of the gas to be processed), and the post-rotating body is moved to the adsorbing region thereof. The substance to be adsorbed in the gas to be treated is treated by rotating it at a rotational speed that maximizes the rate of adsorption and desorption of the latter part of the rotating body with respect to the concentration of the substance to be adsorbed in the processing gas (the concentration reduced by passing through the former part of the rotating body). In doing so, the former stage rotor and the latter stage Rotating body each of the adsorption-desorption function can be maximized.

〔The invention's effect〕

From this, according to the present invention, the separation and collection efficiency of the entire device for the substance to be adsorbed in the gas to be treated, that is, the processing performance of the entire device for the gas to be treated in this type of rotary gas treatment device, It can be improved more effectively than the conventional device.

In particular, in the case of a substance to be adsorbed composed of a plurality of components as represented by a paint solvent contained in the exhaust gas from the coating booth, the substance reaches the adsorption region of the latter rotating body due to the adsorption characteristics of the former rotating body. In the gas to be treated, there is a state in which a large amount of components that are not adsorbed in the adsorption region of the pre-adsorber and remain in a large amount coexist in the gas together with the remaining components efficiently adsorbed in the adsorption region of the pre-rotor. However, by rotating the subsequent rotating body at a rotation speed at which the adsorption / desorption efficiency becomes maximum with respect to the concentration of the component to be adsorbed (the concentration as a whole in a state where the component ratio is changed) of the gas to be treated which reaches in such a state. By adsorbing and collecting each component of the substance to be adsorbed remaining in the gas in the adsorption region of the latter rotating body as much as possible, the preceding rotating body is rotated at a rotational speed at which the adsorption and desorption efficiency is maximized. Contained in the original gas to be treated Several components to be adsorbed can be efficiently separated and collected as a whole, and the improvement in the processing performance of the conventional apparatus becomes more remarkable compared to the case where the substance to be treated processes a single component gas to be treated. , In this regard,
The apparatus is particularly suitable for treating a gas to be treated containing a substance to be adsorbed composed of a plurality of components.

[Second characteristic configuration of the present invention] A second characteristic configuration of the rotary gas processing apparatus according to the present invention resides in that the gas to be processed is a paint booth exhaust containing a paint solvent as a substance to be adsorbed. According to the two characteristic configurations, as described above, since the processing performance can be particularly effectively enhanced in the processing of the gas to be treated including the substance to be adsorbed composed of a plurality of components, the exhaust gas from the coating booth is used as the gas to be treated. In this method, paint solvent as a substance to be adsorbed consisting of multiple components contained in it can be separated and collected more efficiently than in the conventional equipment, thereby improving the purification of paint booth exhaust and improving the environment. Can be promoted.

〔Example〕

FIGS. 1 and 2 show a rotary gas processing apparatus in which exhaust gas from a coating booth is used as a gas to be treated, and paint solvents and the like contained in the exhaust gas are separated and collected to purify the exhaust gas as the gas to be treated. And two disc-shaped rotating bodies (1) and (2) having a honeycomb structure mainly composed of fibrous fine activated carbon (an example of an adsorbent) and capable of ventilation in the direction of the rotation axis (P). The rotating bodies (1) and (2) are arranged concentrically within the casing (3) at appropriate intervals.

The casing (3) allows the gas to be treated (G) to flow from one end of the rotating body juxtaposition direction (that is, the direction of the rotation axis (P) of the rotating bodies (1) and (2)). (G) is sequentially passed through both rotators (1) and (2) in both rotators (1) and (2) at substantially the same specific phase portions (A ₁ ) and (A ₂ ) in the respective rotation ranges. After the treatment, a series of gas passages to be treated (GF) discharged from the other end is formed.

In the casing (3), both rotating bodies (1),
(2) Other same phase portions (B ₁ ) in each rotation range,
In (B ₂ ), high-temperature regeneration gas (H) is applied to each rotating body (1) and (2).
The recirculation gas passages (HF ₁ ) and (HF ₂ ) through which the gas passes are formed.

That is, in the rotation range of each of the rotating bodies (1) and (2),
The specific phase portions (A ₁ ) and (A ₂ ) through which the gas to be processed (G) passes are used as the adsorption zone, and the other phase portions (B ₁ ) and (B) through which the regeneration gas (H) passes. ₂ ) is the desorption area, and with the rotation of both rotating bodies (1) and (2),
In the adsorption areas (A ₁ ) and (A ₂ ), the substances to be adsorbed (ie, paint solvents and the like contained in the exhaust gas from the coating booth) in the gas to be treated (G) are rotated (1) and (2). And adsorbing the adsorbed substance in the desorption zones (B ₁ ) and (B ₂ ) with the rotating body (1),
The gas to be treated (G) is obtained by repeating the step (2) of desorbing the fine activated carbon into the high-temperature regeneration gas (H).
The paint solvent and the like are continuously separated and collected from the exhaust gas.

In addition, the desorption area (B ₁ ), (B ₂ ) of each rotating body (1), ( ₂ )
The regenerated gas paths (HF ₁ ) and (HF ₂ ) are connected as a series of air paths connected in series to each other, and in this series of regenerated gas paths (HF ₁ ) and (HF ₂ ), both rotating bodies (1) are connected. ),
Between the desorption zones (B ₁ ) and (B ₂ ) of ( ₂ ), the regeneration gas (H) whose temperature has dropped due to passing through the desorption zone (B ₂ ) on the upstream side
Is provided with an intermediate heater (4) for raising the temperature.

The regeneration gas (H) that has passed through both desorption zones (B ₁ ) and (B ₂ ) is then sent to a combustion device, where the desorption material such as solvent contained in the regeneration gas (H) is contained. Is incinerated.

The driving mechanism for rotating the first-stage rotator (1) in which the adsorption region is located on the upstream side and the second-stage rotator (2) in which the adsorption region is located on the downstream side in the gas flow path to be treated (GF) includes: Rotating shaft (1a) for attaching 1) and (2) in a fixed state
(2a), one motor (5) as a driving source, and
The rotational force of the motor (5) is applied to the rotating shafts (1a), (2a)
The transmission mechanisms (6a) and (6b) for transmitting power to the motor are configured as main constituent devices. In this drive mechanism, the first-stage rotating body (1) and the second-stage rotating body (2) are rotated at predetermined rotational speeds different from each other. In order to rotate at (v ₁ ) and (v ₂ ), the rotation axis (1a) for the first-stage rotator (1) and the rotation axis (2a) for the second-stage rotator (2) are separated and independent from each other. As the transmission mechanisms (6a) and (6b), a front-stage transmission mechanism (6a) for transmitting the rotational force of the motor (5) to the rotating shaft (1a) of the front-stage rotator (1) and the motor (5) A rear-stage transmission mechanism (6b) for transmitting the rotational force to the rotating shaft (2a) of the rear-stage rotating body (2) is separately provided, and these transmission mechanisms (6a),
(6b) The transmission ratios (that is, the rotation ratios of the driving side and the driven side) are different from each other.

As shown in FIG. 3, the predetermined rotational speeds (v ₁ ) and (v ₂ ) of the first-stage rotator (1) and the first-stage rotator (2) are different from those of this kind of rotators (1) and (2). In contrast to the fact that the rotational speed (v) of the rotating body at which the adsorption / desorption efficiency (η) becomes the maximum differs depending on the concentrations (d) and (d ′) of the substance to be adsorbed in the gas (G) to be treated, The adsorption / desorption efficiency (η ₁ ) of the preceding rotating body (1) with respect to the concentration (d ₁ ) of the substance to be adsorbed (G) reaching the adsorption area (A ₁ ) of the body ( ₁ )
Is determined as the predetermined rotation speed (v ₁ ) of the _first- stage rotator (1), and the second-stage rotator (2) after passing through the adsorption area (A ₁ ) of the _first- stage rotator (1). Adsorption area (A ₂ )
The rotation speed at which the adsorption / desorption efficiency (η ₂ ) of the latter rotating body (2) becomes maximum with respect to the concentration of the substance to be adsorbed (d ₂ ) of the gas to be treated (G) reaching the predetermined rotating body (2) Rotation speed (v ₂ )
And the motor (5) is configured to rotate the first-stage rotator (1) and the second-stage rotator (2) at the predetermined rotational speeds (v ₁ ) and (v ₂ ) determined as described above. ) And the transmission ratio of each transmission mechanism (6a), (6b).

That is, as described above, each of the first-stage rotator (1) and the second-stage rotator (2) is connected to their adsorption / desorption efficiency (η ₁ ),
By rotating at the rotational speeds (v ₁ ) and (v ₂ ) at which (η ₂ ) is maximized, an extremely high separation and collection efficiency for the substance to be adsorbed in the gas to be treated (G) is obtained as a whole. It is made available.

In the rotation range of the latter rotating body (2), between the end of the desorption area (B ₂ ) and the beginning of the adsorption area (A ₂ ) in the rotational direction of the latter rotating body (2), the latter rotating body (2). The upstream side of () communicates with the gas path to be treated (GF), but the latter stage rotating body (2)
Downstream, a middle area (C) is provided which communicates with a return air path (RF) partitioned for both the gas path to be treated (GF) and the gas path for regeneration (HF ₂ ), and The return air passage (RF) has a downstream end connected to the gas passage to be processed (GF) at an upstream side of the pre-rotating body (1).

That is, in the intermediate region (C) immediately after passing through the desorption region (B ₂ ) in the rotation of the post-rotation body (2), the temperature of the post-rotation body (2) is still high, and The adsorbing effect on the adsorbing substance is low, so that the adsorbed substance passes through the intermediate region (C) without being adsorbed and captured.

Then, the gas to be treated (G) that has passed through the intermediate region (C) is returned to the gas passage to be treated (GF) on the upstream side of the pre-rotator (1) by the return air passage (RF), and is returned again. The separation and collection of the substance to be adsorbed is performed in the adsorption area (A ₁ ) of the first rotating body (1) and the subsequent adsorption area (A ₂ ) of the second rotating body (2). 2) is the above intermediate region (C)
Is sufficiently cooled by the gas to be treated (G) during the passage of the gas, and in the adsorption zone (A ₂ ) following the intermediate zone (C), a high adsorption action is exerted from the start end thereof, whereby the substance to be adsorbed is adsorbed. Adsorption area (A ₂ ) of post-rotator (2) without being captured
Is more reliably prevented from passing through.

(Another embodiment)

 Next, another embodiment of the present invention will be described.

(A) The above-described embodiment is used to configure a drive mechanism capable of rotating the first-stage rotating body (1) and the second-stage rotating body (2) at different predetermined rotational speeds (v ₁ ) and (v ₂ ). Instead of such a configuration, for example, a configuration may be adopted in which a motor for rotating the first-stage rotator (1) and a motor for rotating the second-stage rotator (2) are separately provided. The configuration can be changed in various ways.

(B) the rotational speed of the rotational speed of the front rotary member (1) (v ₁₎ and subsequent rotary body (2) and (v _2), the rotating body (1), (2)
To be treated (G) for the adsorption area (A ₁ ) and (A ₂ )
May be appropriately changed and adjusted according to the change in the concentration (d ₁ ) or (d ₂ ) of the substance to be adsorbed, or the rotational speed (v ₁ ) of each of the rotating bodies (1) and (2) based on the concentration detection. ), (V ₂ ) may be automatically changed and adjusted.

(C) The first-stage rotator (1) and the second-stage rotator (2) are each 1
The number is not limited to one, and one or both of them may be plural.

(D) Three or more rotating bodies are juxtaposed, and the correlation between the first rotating body (1) and the second rotating body (2) of the present invention is applied to the first rotating body and the second rotating body. In addition, the apparatus configuration may be such that the correlation between the first-stage rotator (1) and the second-stage rotator (2) of the present invention is applied to the second rotator and the third rotator.

(E) Rotation direction of first-stage rotating body (1) and second-stage rotating body (2)
May be opposite to each other.

(F) The intermediate region (C) and the return air passage (RH) in the above embodiment may be omitted.

(G) The present invention is applicable not only to the exhaust from the coating booth but also to the treatment of various gases in various fields.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure shown in the attached drawings.

[Brief description of the drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a perspective view showing a schematic apparatus configuration, and FIG. 2 is a longitudinal sectional view. FIG. 3 is a graph showing the correlation between the concentration of the substance to be adsorbed, the rotation speed, and the adsorption / desorption efficiency. (1)… front rotator, (2)… rear rotator, (1
a), (2a), (5), (6a), (6b) ... driving mechanism,
(A ₁ ), (A ₂ ): adsorption area, (B ₁ ), (B ₂ ): desorption area, (GF): gas passage to be treated, (HF ₁ ), (HF ₂ )
Regenerative gas flow path, (v ₁ ), (v ₂ ) ... rotation speed, (G) ...
... gas to be treated, (d ₁ ), (d ₂ ) ... concentration of substance to be adsorbed,
(Η ₁ ), (η ₂ ): adsorption / desorption efficiency.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazuyuki Kawada 2-1-1 Katata, Otsu City, Shiga Prefecture Inside Toyo Boseki Co., Ltd. (56) References JP-A-3-258324 (JP, A) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) B01D 53/06

Claims (2)

(57) [Claims] A first rotating body and a second rotating body each having an adsorbent as a main component and capable of being ventilated in a direction of a rotation axis (P); 2) The gas to be treated (G) is supplied to the rotating bodies (1) and (2) in each of the rotation ranges.
Adsorption zone (A _1), passing through a (A ₂₎ and the regeneration gas to (H) the rotating body (1), the desorption zone to pass to (2) (B _1),
(B ₂ ), and the adsorption area (A ₁ ) of the preceding rotating body ( ₁ )
And the adsorption area (A ₂ ) of the latter rotating body (2) are arranged in that order from the upstream side of the air path and arranged in a series of gas passages to be treated (GF), and the former rotating body (1) and the latter Rotating body (2)
Each of the desorption areas (B ₁ ) and (B ₂ ) is connected to the regeneration gas airway (H
F ₁ ), (HF ₂ ), and drive mechanisms (1 a), (2) for rotating the former rotating body (1) and the latter rotating body (2)
A rotary gas processing apparatus provided with a), (5), (6a), and (6b), and its driving mechanisms (1a), (2a), (5), (6a), (6b)
Is configured to rotate the first-stage rotator (1) and the second-stage rotator (2) at predetermined rotation speeds (v ₁ ) and (v ₂ ) different from each other, and the predetermined rotation of the first-stage rotator (1) is performed. The rotational speed (v ₁ ) is set to be equal to the concentration of the substance to be adsorbed (d ₁ ) of the gas to be treated (G) reaching the adsorption area (A ₁ ) of the preceding stage rotating body (1). Is set to a speed that maximizes the adsorption / desorption efficiency (η ₁ ) of the second rotating body (2), and the predetermined rotation speed (v ₂ ) of the second rotating body (2) is set to the adsorption area (A ₂ ) of the second rotating body (2). )) Is set to a speed at which the adsorption / desorption efficiency (η ₂ ) of the subsequent rotating body ( ₂ ) is maximized with respect to the concentration of the substance to be adsorbed (d ₂ ) of the gas to be treated (G). Processing equipment. 2. The rotary gas processing apparatus according to claim 1, wherein the gas to be treated (G) is a paint booth exhaust containing a paint solvent as a substance to be adsorbed.