JP2004025126A - Gas concentrating apparatus and gas concentrating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas concentrating apparatus which is simple in configuration, efficient in occupying space and can realize an efficient treatment, and to provide a gas concentrating method. <P>SOLUTION: This gas concentrating apparatus is provided with a body casing 1 in which the air A1 to be treated is circulated, a honeycombed adsorbing body 2 fixed in the casing 1 for adsorbing an organic solvent or gas such as moisture and a gaseous substance in the air A1, a gas supplying nozzle 3 for supplying a regenerating gas for desorbing the adsorbed gas and gaseous substance, a gas discharging nozzle 5 for discharging the regenerating gas passed through the body 2 and a feed mechanism 4 for moving the nozzles 3 and 5 along the surfaces opposite to each other of the body 2 respectively. The nozzle 5 is made larger than the nozzle 3. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas concentrating device and a gas concentrating method used for, for example, treatment of exhaust gas containing an organic solvent and the like, removal of water vapor (dehumidification), and the like.
[0002]
[Prior art]
Currently, in exhaust gas treatment equipment for purifying exhaust gas containing low-concentration organic solvents, dehumidifiers for desiccating spaces in factories and clean rooms, desiccant air conditioners, etc. In order to dehumidify, a honeycomb rotor type concentrator is used. A honeycomb rotor is a drum-shaped honeycomb (honeycomb) adsorbent that purifies or dehumidifies in the process of passing air to be treated. It is formed by supporting an adsorbent such as activated carbon or silica gel.
[0003]
As an example of such a honeycomb rotor type concentrator, FIG. 5 shows an apparatus for concentrating water vapor to dehumidify the processing air. That is, the honeycomb rotor 21 is rotatably provided in the main body casing 20 by the drive motor 22 and is divided into an adsorption portion 21a, a regeneration portion 21b, and a purge portion 21c according to the rotation position. Although not shown in the drawings, each of the air supply and exhaust fans and the duct path for separating the adsorption unit 21a, the regeneration unit 21b, and the purge unit 21c are configured in the main body casing.
[0004]
The adsorbing part 21a is a place where the treated air A1 is allowed to pass through the honeycomb rotor 21 to be dehumidified treated air A2. The regenerating unit 21b is a portion where the adsorbed moisture is desorbed (dehumidified) by passing the heated clean air B1 through the honeycomb rotor, and the purge unit 21c is desorbed (dehumidified) air and processing air. Is a part for driving out so as not to mix, and the air B2 and the purge air C2 after the regeneration process are exhausted as a humid gas.
[0005]
[Problems to be solved by the invention]
By the way, the above concentration apparatus has the following problems.
(1) Since the honeycomb rotor has a drum shape, a wasteful space is generated between the outer periphery of the honeycomb rotor and the main body casing in the main body casing having a generally square cross section.
(2) Since the speed is different between the central portion side and the outer peripheral portion side of the honeycomb rotor, the time used for adsorption and the time used for regeneration are different between the central portion side and the outer peripheral portion side, and are uniform over the entire surface. It is difficult to realize processing.
[0006]
(3) Since the area ratio between the regeneration unit and the adsorption unit is determined at the initial design stage, it cannot be changed corresponding to the concentration change during operation. In order to cope with this, even if the moving speed of the reproduction unit is changed by changing the rotation speed, the moving speed of the adsorption unit also changes accordingly. Regeneration cannot be performed and heat loss is large.
[0007]
(4) In addition to the air supply path and exhaust path for the regeneration unit and the adsorption unit, it is necessary to provide an air supply path and exhaust path for the purge unit in the main body casing, and the configuration of the duct and the like is complicated. It becomes.
(5) Since a large number of air supply paths and exhaust paths must be provided separately, it is difficult to incorporate them well into a general air conditioner in which the paths from the air supply to the exhaust are consistent.
[0008]
The present invention has been proposed in order to solve the above-described problems of the prior art, and its object is to provide a gas concentration that has a simple structure, is free of space, and can realize efficient processing. An apparatus and a gas concentration method are provided.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a gas concentrating device according to the first aspect of the present invention includes a main body casing through which a gas to be processed can flow, and a gas or gas in the gas to be processed that is fixed in the main body casing. An adsorbent that adsorbs a substance, an air supply nozzle that supplies a regeneration gas for desorption of an adsorbed gas or a gaseous substance to the adsorbent, and exhausts the regeneration gas that has passed through the adsorbent. An exhaust nozzle and a feed mechanism for moving the air supply nozzle and the exhaust nozzle along the opposing surface of the adsorbent are provided.
[0010]
According to the gas concentration method of the present invention, a regeneration gas is supplied to a stationary adsorbent through an air supply nozzle, and exhausted through an exhaust nozzle to the adsorbent. The adsorbed gas or gaseous substance is desorbed.
[0011]
In the invention according to claims 1 and 4 as described above, by making the adsorbent fixed, it is possible to obtain an appropriate shape in which no useless space is generated in the main body casing 1, and effective use of the space. Is possible. In addition, since the adsorbent is a fixed type, a uniform treatment can be realized on the entire surface as compared with a rotary honeycomb rotor. Furthermore, by changing the moving speeds of the supply nozzle and the exhaust nozzle, it is possible to perform optimum adsorption and regeneration according to the concentration change.
[0012]
According to a second aspect of the present invention, in the gas concentrating device according to the first aspect, the adsorbent has a honeycomb structure.
In the invention according to claim 2 as described above, since the adsorbent is a honeycomb structure capable of performing efficient purification and dehumidification, a further excellent device can be obtained.
[0013]
According to a third aspect of the present invention, in the gas concentrating device according to the first or second aspect, the exhaust nozzle is formed larger than the supply nozzle.
In the invention according to claim 3 as described above, since the exhaust nozzle is formed larger than the air supply nozzle, there is no leakage of exhaust gas from the air supply nozzle and heat loss, and the function as a purge unit can be achieved. it can. Therefore, it is not necessary to separately provide a special air supply path and exhaust path for purging, and the configuration can be simplified.
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention (hereinafter referred to as an embodiment) will be specifically described with reference to the drawings.
[Configuration of the embodiment]
First, the configuration of the present embodiment will be described with reference to FIGS. 1 and 2. That is, in this embodiment, the honeycomb adsorbent 2 for adsorbing an organic solvent or moisture is provided in the main casing 1. This honeycomb adsorbent 2 can be formed of the same material as that of a known honeycomb rotor, but is not a drum shape but a rectangular parallelepiped shape that can minimize a useless space in the cross section of the main body casing 1. . Further, the honeycomb adsorbent 2 is fixed in the main body casing 1 instead of a rotating structure. One side of the honeycomb adsorbent 2 is an air supply side to which the processing air A1 is supplied, and the other side is an exhaust side from which the processing air A2 is discharged.
[0014]
An air supply nozzle 3 for supplying regeneration clean air B1 is provided at a position close to the air supply side surface of the honeycomb adsorbent 2. As shown in FIG. 2, the air supply nozzle 3 is provided so as to be vertically and horizontally movable along the surface of the honeycomb adsorbent 2 by a feed mechanism 4. The feed mechanism 4 is configured on a horizontal frame 41 and a pair of vertical frames 42. The horizontal frame 41 and the vertical frame 42 are provided with rails 41a and 42a and racks 41b and 42b, respectively. The air supply nozzle 3 is provided so as to be horizontally movable along the rail 41a by a combination of a pinion of the motor 43 and a rack 41b engaged therewith. The horizontal frame 41 is provided so as to be vertically movable along the rail 42a by a combination of a pinion of the motor 44 and a rack 42b engaged therewith. Although not shown, the motors 43 and 44 of the feed mechanism 4 are connected to a control device that controls the operation and the number of rotations thereof, and the movement speed of the air supply nozzle 3 is controlled by this control device. It is configured.
[0015]
On the other hand, an exhaust nozzle 5 for exhausting the regenerated air B2 that has passed through the honeycomb adsorbent 2 is provided at a position close to the exhaust side surface of the honeycomb adsorbent 2 and facing the air supply nozzle 3. ing. The exhaust nozzle 5 is formed to be slightly larger than the air supply nozzle 3. The size of the exhaust nozzle 5 with respect to the supply nozzle 3 is not particularly limited. For example, as shown in FIG. 3, W and h are approximately the same as or twice the size of one stage and one row of honeycombs. It is possible to design so that it becomes. In this way, the portion of the exhaust nozzle 5 that is larger than the air supply nozzle 3 corresponds to the purge portion of the honeycomb rotor, and heat loss and exhaust leakage, that is, the desorbed concentrated gas is on the processing air side. It functions to prevent leakage. The exhaust nozzle 5 is also provided so as to be movable up and down and left and right along the surface of the honeycomb adsorbent 2 by a feed mechanism (not shown) similar to the air supply nozzle 3. Moreover, the above-mentioned control apparatus is comprised so that each feed mechanism 4 may be controlled synchronously so that the exhaust nozzle 5 and the air supply nozzle 3 may always move while maintaining the opposing positions.
[0016]
Further, as shown in FIG. 1, one end of a flexible duct 6 for feeding clean air B1 for regeneration is connected to the air supply nozzle 3. The flexible duct 6 has elasticity and flexibility that allow movement of the air supply nozzle 3. The other end of the flexible duct 6 is connected to a heater 7 that heats the regeneration air. The heater 7 is connected to a heat exchanger 8, a fan 9, and a regeneration air supply port (not shown) via an air flow path such as a duct or a pipe.
[0017]
On the other hand, the exhaust nozzle 5 is connected to one end of a flexible duct 10 for exhausting the regenerated air B2. The flexible duct 10 has stretchability and flexibility that allow the exhaust nozzle 5 to move. The other end of the flexible duct 10 is connected to the heat exchanger 8 so that heat exchange between the regenerated air B2 and the clean air B1 is possible. The heat exchanger 8 is connected to a fan 11 and a regeneration exhaust port (not shown) through an air flow path such as piping.
[0018]
Although not shown, the main casing 1 is provided with an air supply port for the air to be processed A1 (exhaust gas, water vapor, etc.) and an exhaust port for the processing air A2 (purified or dehumidified air). And although not shown in figure in the main body casing 1, the blower which sends the to-be-processed air A1 which flowed in from the air supply opening to the honeycomb adsorption body 2, or the processing air A2 which passed the honeycomb adsorption body 2 is discharged | emitted from an exhaust port. An exhaust fan is provided.
[0019]
[Operation of the embodiment]
The procedure of exhaust gas treatment or dehumidification treatment and the procedure of regeneration treatment in the present embodiment as described above are as follows.
[Exhaust gas treatment or dehumidification treatment]
First, exhaust gas treatment or dehumidification treatment will be described. That is, as shown in FIG. 1, the air to be treated A1 (exhaust gas, water vapor, etc.) fed into the main body casing 1 from the air supply port is supplied to the honeycomb adsorbent 2 by operating the blower or the exhaust fan. The air is blown to the air supply side surface other than the portion where the nozzle 3 and the exhaust nozzle 5 are present. In the process of passing through the honeycomb adsorbent 2, the air to be treated A1 is adsorbed with an organic solvent, moisture, and the like, and is discharged from the exhaust side surface as treated air A2 (purified or dehumidified air). Then, the processing air A <b> 2 is exhausted from the exhaust port in the main body casing 1.
[0020]
[Playback processing]
The following regeneration process is performed in parallel with or separately from the exhaust gas process or dehumidification process as described above. First, while the feed mechanism 4 is operated by the control device and the air supply nozzle 3 and the exhaust nozzle 5 are moved, the fans 9 and 11 are operated to cause the clean air B1 for regeneration to flow from the regeneration air supply port. This clean air B1 for regeneration is preheated in the heat exchanger 8 by heat exchange with air B2 after regeneration processing described later, heated by the heater 7, and then supplied to the air supply nozzle 3.
[0021]
As shown in FIG. 4, the heated clean air B <b> 1 supplied from the air supply nozzle 3 is exhausted to the exhaust nozzle 5 while desorbing the adsorbed organic solvent and moisture in the process of passing through the honeycomb adsorbent 2. The The regenerated air B2 (concentrated gas or humid gas) is sent from the exhaust nozzle 5 to the heat exchanger 8, cooled by heat exchange with the clean air B1 for regeneration, and discharged from the regeneration exhaust port. Is done. In addition, since the exhaust nozzle 5 is formed larger than the air supply nozzle 3, it is possible to prevent the air B2 after the regeneration process from leaking to the processing air side and, as a result, heat loss.
[0022]
[Effect of the embodiment]
According to the present embodiment as described above, since the honeycomb adsorbent 2 is fixed in the main casing 1, it is possible to have a rectangular parallelepiped shape that can minimize the useless space in the cross section of the main casing 1. Become. For this reason, as compared with the honeycomb rotor, the space can be effectively utilized and the air capacity that can be processed increases.
[0023]
Further, since the honeycomb adsorbing body 2 is a fixed type, the time used for adsorption and the time used for regeneration are not different between the central side and the outer peripheral side as in the rotary type honeycomb rotor. Uniform processing can be realized.
Even if the moving speeds of the air supply nozzle 3 and the exhaust nozzle 5 are changed, the honeycomb adsorbent 2 is fixed, so that the area of the portion used for adsorption does not change. Therefore, by changing the moving speed of the supply nozzle 3 and the exhaust nozzle 5, optimum adsorption and regeneration can be performed according to the concentration change, and heat loss is small.
[0025]
Furthermore, since the purge unit can be realized by making the exhaust nozzle 5 larger than the air supply nozzle 3, it is not necessary to separately provide a special air supply path and exhaust path for purging, and the duct configuration can be simplified. it can. In particular, the flexible ducts 6, 10 and the like merely provide a path for supplying clean air B1 for regeneration from the air supply nozzle 3 and a path for exhausting the air B2 after regeneration processing from the exhaust nozzle 5, It is easy to incorporate into a general air conditioner having a consistent path from the supply air of the air to be processed A1 to the exhaust of the process air A2.
[0026]
[Other Embodiments]
The present invention is not limited to the embodiment as described above, and the size, shape, material, number, and the like of each member can be changed as appropriate. For example, in the above embodiment, the air supply nozzle and the exhaust nozzle are formed to be smaller than the width and height of the honeycomb adsorbent and can be moved vertically and horizontally. The width or height equivalent to that of the adsorbent may be configured to be movable in one vertical or horizontal direction. Further, the air supply nozzle and the exhaust nozzle may be provided so as to be movable in an oblique direction, or provided so as to be capable of circular movement along the surface of the honeycomb adsorbent. Furthermore, the supply nozzle and the exhaust nozzle may be temporarily retracted from the surface of the honeycomb adsorbent so that the entire surface of the honeycomb adsorbent can be used for processing. From the above, the configuration of the feed mechanism that moves the air supply nozzle and the exhaust nozzle is not limited to that exemplified in the above embodiment.
[0027]
Moreover, it is good also as a structure which can change the area of a reproduction | regeneration part by providing an air supply nozzle and an exhaust nozzle so that replacement | exchange is possible for another thing. Moreover, a pair of air supply nozzle and exhaust nozzle is not limited to one set, and a plurality of sets may be provided. Further, the air supply nozzle and the exhaust nozzle may be attached in opposite directions. That is, as in the conventional method, the processing air and the regenerative air may be used as counterflows.
[0028]
Also, the adsorbent is not limited to a honeycomb structure, and the type of adsorbent to be used is also free and is not limited to those exemplified above. The shape of the adsorbent can also be freely changed in relation to the main body casing. For example, if the main casing is cylindrical or elliptical, it may be cylindrical or elliptical, and the shape of the supply nozzle and exhaust nozzle may be changed to circular or elliptical according to this. Good. Furthermore, in the present invention, the gas adsorbed by the adsorbent and desorbed by the regenerated air is not limited to a gas such as an organic solvent or water vapor, and widely includes a gaseous substance. Therefore, the gas to be processed and the gas for regeneration are not limited to those exemplified above.
[0029]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a gas concentrating device and a gas concentrating method capable of realizing efficient processing with a simple configuration, without wasting space.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a gas concentrator of the present invention.
FIG. 2 is a perspective view showing a feeding mechanism of the embodiment of FIG.
FIG. 3 is an explanatory diagram showing the relationship between the sizes of an air supply nozzle and an exhaust nozzle in the embodiment of FIG. 1;
4 is a plan view showing a flow of regeneration air in the embodiment of FIG. 1. FIG.
FIG. 5 is a perspective view showing an example of a conventional honeycomb rotor type gas concentrator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,20 ... Main body casing 2 ... Honeycomb adsorption body 3 ... Air supply nozzle 4 ... Feed mechanism 5 ... Exhaust nozzle 6, 10 ... Flexible duct 7 ... Heater 8 ... Heat exchanger 9, 11 ... Fan 21 ... Honeycomb rotor 21a ... Adsorption part 21b ... Purge part 21c ... Regeneration part 22 ... Drive motor 41 ... Horizontal frames 41a, 42a ... Rail 41b, 42b ... Rack 42 ... Vertical frames 43, 44 ... Motor A1 ... Processed air A2 ... Processed air B1, C1 ... Clean air B2 ... Regenerated air C2 ... Residual air to be treated

Claims (4)

A body casing through which the gas to be treated can flow;
An adsorbent that is fixed in the main body casing and adsorbs a gas or a gaseous substance in the gas to be treated; and
An air supply nozzle for supplying a regeneration gas for desorption of the adsorbed gas or gaseous substance to the adsorbent;
An exhaust nozzle for exhausting the regeneration gas that has passed through the adsorbent;
A feed mechanism for moving the air supply nozzle and the exhaust nozzle respectively along the opposing surface of the adsorbent;
A gas concentrating device characterized by that. The gas concentrator according to claim 1, wherein the adsorbent has a honeycomb structure. 3. The gas concentrator according to claim 1, wherein the exhaust nozzle is formed larger than the supply nozzle. Desorption of the gas or gaseous substance adsorbed on the adsorbent is performed by supplying a regeneration gas to the fixed adsorbent through an air supply nozzle and exhausting it through an exhaust nozzle. A gas concentration method characterized by the above.

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