JP4960985B2 - Adsorption rotor type gas processing apparatus and adsorption rotor manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the performance an adsorption rotor type gas treatment apparatus from being degraded caused by moisture adsorption. <P>SOLUTION: In the adsorption rotor type gas treatment apparatus which is provided with an air permeable adsorption rotor 1 which holds an adsorbent X to be adsorbed to a volatile organic substance v in gas G to be processed at a state that the adsorbent is dispersed in the rotor rotating direction, and constituted so that each part of the rotor rotating direction of the adsorption rotor 1 is alternately located in an adsorption area 3 which is a ventilation area of the gas G to be processed and an attachment/detachment area 4 which is a ventilation area of gas H for attachment/detachment by rotation of the adsorption rotor 1, the adsorption rotor 1 is constituted by being provided with a moisture adsorption part 1A which is made to hold silica gel Xs as an adsorbent, and an organic substance adsorption part 1B which is made to hold zeolite Xz as an adsorbent at a state that they are aligned from the upstream side of the ventilation direction of the gas to be processed in the adsorbing area 3 in this order. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to an adsorption rotor type gas treatment device used for removing volatile organic substances (so-called VOC) contained in, for example, factory exhaust gas, and a method for producing an adsorption rotor used in the gas treatment device,
Specifically, a breathable adsorption rotor that holds an adsorbent that adsorbs volatile organic substances in the gas to be treated in a dispersed state in the rotor rotation direction is provided, and each part of the adsorption rotor in the rotor rotation direction is provided. An adsorption rotor type gas treatment device configured to be alternately positioned in an adsorption region which is a ventilation region of a gas to be treated and a desorption region which is a ventilation region of a desorption gas by rotation of the adsorption rotor, and the gas treatment device The present invention relates to a method of manufacturing an adsorption rotor used in the above.

  In this type of adsorption rotor type gas treatment apparatus, various adsorbents such as zeolite are used as adsorbents to be held in the adsorption rotor (see Patent Document 1), and volatile organic substances in the gas to be treated are used as adsorbents. In the adsorption process, if the gas to be treated contains moisture (water vapor), the moisture in the gas to be treated is also adsorbed by the adsorbent together with the volatile organic substance. The removal performance for removing substances by adsorption (in other words, the purification performance for the gas to be treated) is greatly reduced.

  And in order to prevent the performance fall resulting from this water | moisture content adsorption | suction, to-be-processed gas is also cooled and dehumidified prior to an adsorption | suction process.

JP 2007-44687 A

  However, even if the gas to be treated is cooled and dehumidified prior to the adsorption step as described above, there is actually a limit to the dehumidification, so that moisture still remains in the gas to be treated after cooling and dehumidification. However, the performance degradation caused by moisture adsorption as described above cannot be sufficiently prevented, and the amount of adsorbent necessary to obtain the required removal rate for the volatile organic substances in the gas to be processed increases accordingly. As a result, the size of the apparatus increases and the cost of the apparatus increases. In addition, as the amount of adsorbent increases, the necessary heating amount in the desorption process also increases, resulting in increased energy consumption.

  In addition, in order to cool and dehumidify the gas to be treated prior to the adsorption step, a heat exchanger for cooling the gas and a cold heat source device are required as a dehumidifying device. There is also a problem that the apparatus cost and energy consumption are further increased.

  In view of this situation, the main problem of the present invention is to effectively solve the above problems by adopting a rational rotor configuration.

To solve the above problem, as a first reference configuration,
A breathable adsorption rotor that holds an adsorbent that adsorbs volatile organic substances in the gas to be treated in a state of being dispersed in the rotor rotation direction, is provided.
An adsorption rotor type in which each part in the rotor rotation direction of this adsorption rotor is positioned alternately in an adsorption area that is a ventilation area of the gas to be treated and a desorption area that is a ventilation area of the desorption gas by rotation of the adsorption rotor In gas processing equipment ,
In the adsorption rotor, a moisture adsorption part that holds silica gel as the adsorbent, and an organic substance adsorption part that holds zeolite as the adsorbent, in that order, from the upstream side in the gas flow direction of the gas to be treated in the adsorption region A structure provided in a line-up state may be used.

  In general, zeolite is known to be excellent in adsorptivity to volatile organic substances, but the graph Ss of adsorption characteristics of silica gel against moisture shown in FIG. 5 and the adsorption characteristics of zeolite to isopropanol (an example of volatile organic substances) are shown. As can be seen from the graph Zs of the adsorption characteristics of Zv and zeolite with respect to moisture, the moisture adsorption property (Ss) of silica gel is considerably superior to the moisture adsorption property (Zs) of zeolite.

  Therefore, as described above, if the adsorption rotor has a structure in which the moisture adsorption part holding silica gel and the organic substance adsorption part holding zeolite are arranged in that order from the upstream side in the direction of the gas to be treated in the adsorption area, the adsorption rotor in the adsorption area. In the adsorption process in which the gas to be treated is caused to pass through the rotor portion in the region and the adsorbent of the rotor part is adsorbed, the moisture in the gas to be treated is first removed while the gas to be treated passes through the upstream moisture adsorbing portion. By efficiently adsorbing on the silica gel of the moisture adsorbing part, the moisture in the gas to be treated can be reduced to the extent that it can no longer be adsorbed by zeolite or close to it by this silica gel.

  Then, by passing the gas to be treated, from which moisture has been sufficiently removed in the moisture adsorbing part, to the organic substance adsorbing part on the downstream side, the zeolite in the organic substance adsorbing part is volatile in the gas to be treated in the passage process. The organic substance can be adsorbed in a state in which there is almost no influence of moisture (that is, a state in which excellent adsorptivity to the volatile organic substance inherent in zeolite is exhibited).

  In other words, this can effectively prevent the performance degradation caused by moisture adsorption as described above, and can remove volatile organic substances in the gas to be treated (in other words, purification performance for the gas to be treated). ) Can be increased to a level close to the case where the gas to be treated does not contain moisture.

  In other words, it is possible to effectively improve the performance of the apparatus in this way, and to obtain the required removal rate for the volatile organic substances in the gas to be treated by utilizing the excellent moisture adsorbability of the silica gel. Even if the amount of adsorbent necessary for this is included including the attachment of the moisture adsorbing part, it can be effectively reduced as a whole compared to the past, the apparatus can be downsized and the apparatus cost can be reduced, Energy consumption can be effectively reduced, for example, the amount of heating required in the desorption process can be reduced by reducing the amount of adsorbent required.

  In addition, it becomes unnecessary to cool and dehumidify the gas to be processed prior to the adsorption process, or even if it is cooled and dehumidified, the dehumidifying device can be completed with a small capacity. In addition, the overall apparatus cost and energy consumption can be effectively reduced.

  In the implementation of the above configuration, the adsorption rotor is a single rotor structure in which the moisture adsorption unit and the organic substance adsorption unit are integrated, or series 2 in which each of the moisture adsorption unit and the organic substance adsorption unit is an independent rotor. Any of the continuous rotor structures may be adopted, but the single rotor structure is adopted from the viewpoints of simplifying the structure of the apparatus and easy sealing around the rotor and less risk of deterioration of the apparatus performance due to gas leakage. Is desirable.

  In addition, it is desirable to use a hydrophobic zeolite that is particularly excellent in adsorptivity to volatile organic substances as the zeolite to be held in the organic substance adsorption part.

As a second reference configuration,
The direction of ventilation of the desorption gas in the desorption region may be a direction in which the desorption gas passes through the organic substance adsorption unit and the moisture adsorption unit in this order .

  In other words, according to this configuration, the desorption step of allowing the desorption gas to pass through the inner rotor portion of the adsorption rotor at the desorption portion and desorbing the adsorbate in the previous adsorption step from the adsorbent of the rotor portion to the desorption gas. In this case, a desorption gas that is not yet used for desorption and still has a high desorption property such as a high gas temperature is first passed through the organic substance adsorption part, so the degree of desorption of volatile organic substances from zeolite in the organic substance adsorption part As a result, the intended purpose of efficiently adsorbing the zeolite in the organic substance adsorbing part to the volatile organic substance in the gas to be treated after removing moisture in the next adsorption step is further ensured. And can be realized effectively.

  On the other hand, the moisture adsorbing part desorbs the adsorbed moisture from the silica gel of the moisture adsorbing part by passing a desorbing gas having a reduced desorbing property such as a gas temperature lowering due to the desorbing action of the organic substance adsorbing part on the zeolite. As described above, since silica gel has extremely excellent moisture adsorption properties, even if moisture desorption from the silica gel of the moisture adsorption portion is somewhat incomplete, the silica gel of the moisture adsorption portion is treated as a gas to be treated in the next adsorption step. It is possible to sufficiently adsorb moisture in the water.

  Therefore, according to the above configuration, the zeolite in the organic substance adsorbing part is made to be volatile in the gas to be treated as compared with the case where the desorption gas is passed in the order from the moisture adsorbing part to the organic substance adsorbing part in the desorption region. Since the intended purpose of efficiently adsorbing the organic substance can be realized more reliably and effectively, the performance of the apparatus can be improved more reliably and effectively.

As a third reference configuration,
The volume ratio of the silica gel retention amount in the moisture adsorption portion and the zeolite retention amount in the organic substance adsorption portion may be in the range of 2: 8 to 5: 5 .

  In general, the optimal volume ratio between the amount of silica gel retained in the moisture adsorbing part and the amount of zeolite retained in the organic substance adsorbing part differs depending on the concentration ratio of moisture and volatile organic substances in the gas to be treated and the type of volatile organic substances. However, in the case of a general concentration ratio (for example, water 100 ppm, volatile organic material 15000 ppm) in an organic solvent using facility or the like in which this kind of adsorption rotor type gas treatment device is often used, It has been found that the optimal volume ratio of the silica gel retention amount in the moisture adsorption part and the zeolite retention amount in the organic substance adsorption part is in the range of 2: 8 to 5: 5 (more preferably 3: 7 to 4: 6).

  That is, when the volume ratio of the silica gel retention amount in the moisture adsorption part and the zeolite retention amount in the organic substance adsorption part is in the above range of 2: 8 to 5: 5, generally the silica gel retention amount and the zeolite retention amount. Can be brought into a state where there is no excess or deficiency between them, and the overall amount of adsorbent can be minimized while effectively improving the expected apparatus performance.

Here, the first characteristic configuration of the present invention relates to an adsorption rotor type gas processing apparatus,
A breathable adsorption rotor that holds an adsorbent that adsorbs volatile organic substances in the gas to be treated in a state of being dispersed in the rotor rotation direction,
An adsorption rotor type gas configured such that each portion of the adsorption rotor in the rotor rotation direction is alternately positioned in an adsorption area which is a ventilation area of the gas to be treated and a desorption area which is a ventilation area of the desorption gas by rotation of the adsorption rotor A processing device comprising:
In the adsorption rotor, a moisture adsorption part that holds silica gel as the adsorbent, and an organic substance adsorption part that holds zeolite as the adsorbent, in that order, from the upstream side in the gas flow direction of the gas to be treated in the adsorption region A structure prepared for the lined-up state,
The ventilation direction of the desorption gas in the desorption region is a direction in which the desorption gas passes through the organic substance adsorption unit in the order of the moisture adsorption unit,
The adsorption area side microwave irradiation means for irradiating the organic substance adsorption part of the rotor part in the adsorption area of the adsorption rotor to the adsorption moisture heating microwave is provided .

According to this configuration, basically the same effects as those of the first reference configuration and the second reference configuration described above can be obtained.
By the way, as is generally known, microwaves in a specific frequency range (around 2.45 GHz) can selectively and efficiently heat only water in a liquid state.

  Therefore, if the microwave in such a frequency range is irradiated to the organic substance adsorbing portion of the rotor portion in the adsorption region by the adsorption region side microwave irradiating means as the microwave for adsorption moisture heating, the silica gel of the moisture adsorbing portion is used. Even if moisture still remains in the gas to be treated after adsorption and removal of moisture, and the residual moisture is adsorbed to the zeolite of the organic substance adsorption part together with the volatile organic substance, only the adsorbed moisture (condensed moisture) is irradiated. The adsorbed moisture can be desorbed from the zeolite of the organic substance adsorbing portion into the gas to be treated in the adsorption step in a form that is selectively heated and vaporized selectively by waves.

  In other words, the effective adsorption of water by the silica gel of the moisture adsorbing part makes it possible for the zeolite in the organic substance adsorbing part to efficiently adsorb the volatile organic substance in the gas to be treated without the influence of moisture. Together with this, it can be achieved more reliably and effectively.

The moisture desorbed from the zeolite in the organic substance adsorbing part in the adsorption step is treated gas from which volatile organic substances have been removed by the zeolite in the organic substance adsorbing part (in other words, purified treated gas). And sent out from the adsorption zone.
The second feature configuration of the present invention specifies an embodiment suitable for the implementation of the first feature configuration.
A breathable microwave blocking means is provided at a boundary portion between the moisture adsorbing portion and the organic substance adsorbing portion in the adsorption rotor.
According to this configuration, it is possible to prevent the irradiation microwave of the adsorption area side microwave irradiation means from entering the moisture adsorption portion of the rotor portion in the adsorption area.
The third feature configuration of the present invention specifies an embodiment suitable for the implementation of the second feature configuration.
The microwave blocking means is the wire net-like metal material holding portion formed at a boundary portion between the moisture adsorption portion and the organic substance adsorption portion in the adsorption rotor.
The fourth characteristic configuration of the present invention specifies an embodiment suitable for the implementation of any of the first to third characteristic configurations,
The volume ratio of the silica gel retention amount in the moisture adsorption portion and the zeolite retention amount in the organic substance adsorption portion is in the range of 2: 8 to 5: 5.

The fifth characteristic configuration of the present invention specifies an embodiment suitable for implementation of any of the first to fourth characteristic configurations,
In the adsorption rotor, a desorption region side microwave irradiating means for irradiating the moisture adsorbing portion of the rotor portion in the desorption region with microwaves for heating adsorption moisture is provided.

  In other words, as described above, microwaves in a specific frequency range (around 2.45 GHz) can selectively and efficiently heat only water in a liquid state. Therefore, microwaves in such a frequency range are used for heating adsorption moisture. If the moisture adsorption part of the rotor part in the desorption area is irradiated as microwaves by the microwave irradiation means on the desorption area side, a large amount of moisture (condensed water) adsorbed by the silica gel of the moisture adsorption part in the adsorption process in the previous adsorption area ) Can be efficiently desorbed from the silica gel of the moisture adsorbing portion to the desorption gas in a form that is efficiently heated and vaporized by irradiation microwave.

  That is, with this, the silica gel in the moisture adsorption part is used for the adsorption removal of the moisture in the gas to be treated in the next adsorption zone in a state where the moisture desorption degree of the silica gel in the moisture adsorption part is further reliably and effectively increased. Accordingly, the required amount of silica gel retained in the moisture adsorbing portion can be further reduced, and the required amount of adsorbent as the entire adsorption rotor can be further reduced.

  In addition, the required temperature of the desorption gas can be reduced by efficiently heating the adsorbed moisture by microwave irradiation, and this also makes energy consumption more effective in combination with the reduction in the amount of adsorbent required. Can be reduced.

  As described above, in the implementation of the above configuration, the adsorption moisture heating microwave is not necessarily limited to a microwave having a frequency in the vicinity of 2.45 GHz, and the moisture adsorbed on the silica gel of the moisture adsorption unit is efficiently heated. Any microwave having a frequency range that can be used may be used.

A sixth characteristic configuration of the present invention relates to a method of manufacturing an adsorption rotor used in any one of the adsorption rotor type gas processing apparatuses of the first to fifth characteristic configurations ,
To manufacture a breathable adsorption rotor that holds an adsorbent that acts to adsorb volatile organic substances in the gas to be treated in a state of being dispersed in the rotor rotation direction .
A silica gel holding part that holds silica gel as the adsorbent on a paper-like holding base and a zeolite holding part that holds zeolite as the adsorbent are formed adjacent to each other,
The silica gel formed in the holding base material in a state in which a plurality of the holding base materials formed with the silica gel holding portion and the zeolite holding portion are formed between the holding base materials. The holding parts and the zeolite holding parts are laminated so as to overlap each other with the air gap part interposed therebetween,
The laminated portion of each other the silica gel holder in the laminate material and the moisture adsorption portion and the moisture laminated portion of the zeolite holder each other in a state that said organic substance-adsorbing portion, the laminate as a rotor constituent material The adsorbing part and the organic substance adsorbing part form a breathable adsorbing rotor arranged in the direction of the gas to be treated.

  That is, according to this manufacturing method, except for the initial step of forming a silica gel holding part and a zeolite holding part adjacent to a paper-like holding base material, the subsequent manufacturing process holds a kind of adsorbent. Ventilation with a moisture adsorption part holding silica gel and an organic substance adsorption part holding zeolite in exactly the same production form as the previous adsorption rotor production method for producing a breathable adsorption rotor using a laminate of base materials as a rotor component Can be manufactured.

  Therefore, the moisture adsorbing part holding silica gel as the adsorbent and the organic substance adsorbing part holding zeolite as the adsorbent are separately manufactured, and then the manufactured moisture adsorbing part and the manufactured organic substance adsorbing part are integrated by bonding. Compared to other manufacturing methods such as manufacturing a breathable adsorption rotor having these moisture adsorbing parts and organic substance adsorbing parts, the silica gel holding moisture adsorbing part and the zeolite holding organic substance adsorbing part are treated gases. The breathable adsorption rotors arranged in the ventilation direction can be manufactured easily and efficiently, and the manufacturing cost can be reduced.

Longitudinal sectional view showing equipment configuration Cross section showing device configuration Perspective view showing suction rotor Schematic perspective view explaining the manufacturing process of the rotor component Graph showing the adsorption characteristics of silica gel and zeolite The figure which shows typically the adsorption | suction process and desorption process in another embodiment. Cross-sectional view showing a suction rotor of another embodiment

  1 to 3 show an adsorption rotor type gas processing apparatus for removing a volatile organic substance v such as an organic solvent contained in a gas G to be processed such as factory exhaust gas and purifying the gas G to be processed. This is an adsorption rotor in which the adsorbent X is held over the entire circumference in the rotor rotation direction. The adsorption rotor 1 has a structure in which the adsorbent X is held in the rotor-constituting material 1x having a honeycomb structure, and the direction of the rotor rotation axis P Ventilation is possible.

  2 is an apparatus case, and the inside is divided into an adsorption region 3 which is a ventilation region of the gas G to be treated and a desorption region 4 which is a ventilation region of the desorption gas H by an internal wall 2a.

  In some cases, in addition to the adsorption zone 3 and the desorption zone 4, a purge zone for venting the purge gas and other target gas ventilation zones may be defined, or the adsorption zone 3 and the desorption zone 4 may be treated. For example, the gas G and the desorption gas H may be partitioned into a plurality of subdivided regions that allow the gas G and the desorption gas H to pass in series in a folded form.

  The adsorption rotor 1 is accommodated in the apparatus case 2 in a state of straddling the adsorption region 3 and the desorption region 4, and each part in the rotation direction of the adsorption rotor 1 is rotated by the rotation of the adsorption rotor 1. And pass them alternately.

  That is, as the adsorption rotor 1 rotates, the gas to be treated G passes through the inner rotor portion of the adsorption rotor 1 in the adsorption region 3, and thereby the retained adsorbent X (detailed later, zeolite Xz) of the rotor portion. An adsorption step for adsorbing and removing the volatile organic substance v in the gas G to be treated is performed.

  Further, along with the rotation of the adsorption rotor 1, the desorption region 4 allows the hot desorption gas H to pass through the inner rotor portion of the adsorption rotor 1, whereby the retained adsorbent X (zeolite Xz) in the rotor portion is the previous one. A desorption step of desorbing the volatile organic substance v adsorbed in the adsorption step to the desorption gas H is performed, and the retained adsorbent X in the rotor portion is regenerated in preparation for the next adsorption step.

  That is, by continuously positioning each part of the suction rotor 1 in the rotor rotation direction in the suction zone 3 and the desorption zone 4 as the rotor rotates, the suction step and the desorption step can be continuously performed in parallel. Thus, the purification process of the gas to be processed G for adsorbing and removing the volatile organic substance v from the gas to be processed G is continuously performed.

  The gaps between the inner wall 2a and outer wall 2b of the device case 2 and the suction rotor 1 are sealed by a sealing means that allows the suction rotor 1 to rotate.

  5a is a gas flow path for supplying the gas G to be processed discharged from the production chamber or the like to the gas inflow chamber 3a of the adsorption zone 3, and 5b is a volatile organic substance v passing through the adsorption rotor 1 in the adsorption zone 3. Is a treated gas path through which the gas to be treated G ′ (that is, the purified treated gas) is removed from the gas outflow chamber 3 b of the adsorption zone 3.

  6a is a desorption gas passage for supplying the desorption gas H to the gas inflow chamber 4a of the desorption region 4, and 6b is in a state containing the volatile organic substance v by passing through the adsorption rotor 1 in the desorption region 4. This is a used desorption gas path for sending out the used desorption gas H ′ from the gas outflow chamber 4 b of the desorption region 4.

  The air volume of the desorption gas H is limited to a smaller volume than the gas volume of the gas to be treated G, so that the volatilization in the used desorption gas H ′ is higher than the concentration of the volatile organic substance v in the gas G to be processed. The concentration process for increasing the concentration of the organic material v is performed by performing the adsorption process and the desorption process in parallel with the purification process of the gas G to be processed.

  Then, the used desorption gas H ′ in a state containing the concentrated volatile organic substance v is sent to the catalytic combustion type or direct combustion type post-stage gas processing apparatus through the used desorption gas passage 6b, and this post-stage The volatile organic substance v in the used desorption gas H ′ is oxidatively decomposed and rendered harmless by the combustion treatment in the gas treatment device.

  On the other hand, the to-be-treated gas G contains a large amount of water s together with the volatile organic material v (for example, volatile organic material 100 ppm, water 15000 ppm), whereas the adsorption rotor 1 is water with silica gel Xs held as an adsorbent. 1 A of adsorption parts and the organic substance adsorption part 1B which hold | maintained the hydrophobic zeolite Xz as an adsorbent are provided.

  Further, the moisture adsorbing portion 1A and the organic substance adsorbing portion 1B are provided in the adsorbing rotor 1 in such a state that they are arranged in that order from the upstream side in the gas flow direction of the gas to be treated.

  That is, by using this adsorption rotor 1, in the adsorption process in which the gas to be processed G is passed through the rotor portion in the adsorption zone 3 and the adsorbent X in the rotor portion is adsorbed, It passes through the moisture adsorbing section 1A on the upstream side, and moisture s (water vapor) in the gas G to be treated is adsorbed on the silica gel Xs of the moisture adsorbing section 1A in the course of the passage.

  That is, since the silica gel Xs has a much higher moisture adsorption property than the zeolite Xz as shown in FIG. 5, the moisture s in the gas G to be treated can no longer be adsorbed by the zeolite Xz due to the moisture adsorption by the silica gel Xs of the moisture adsorption part 1A. It can be reduced to a degree close to that.

  And by passing the gas G to be treated, from which moisture has been sufficiently removed in the moisture adsorbing part 1A, to the organic substance adsorbing part 1B on the downstream side, the zeolite Xz of the organic substance adsorbing part 1B is treated in the passage process. The volatile organic substance v in the gas G is adsorbed in a state where there is almost no influence of moisture s (that is, a state in which excellent adsorptivity to the original volatile organic substance v of the zeolite is sufficiently exhibited).

  That is, this prevents the performance degradation caused by the moisture adsorption of the zeolite Xz, and the removal performance for the volatile organic substance v in the gas G to be treated (in other words, the purification performance for the gas G to be treated). The processing gas G is improved to a level close to that in the case where the processing gas G does not contain moisture s.

  In this example, the concentration of the volatile organic substance v in the gas G to be processed is about 100 ppm and the concentration of the moisture s is about 15000 ppm, whereas the amount of silica gel retained in the moisture adsorption unit 1A and the organic substance adsorption unit 1B The volume ratio with the amount of zeolite retained is in the range of 2: 8 to 5: 5 (preferably in the range of 3: 7 to 4: 6), whereby the silica gel retained amount of the moisture adsorption unit 1A and the organic substance adsorption The amount of the adsorbent as a whole is minimized while effectively improving the removal performance of the volatile organic substance v by making the amount of zeolite retained in the part 1B not to be excessive and insufficient.

  In addition, the direction of ventilation of the desorption gas H in the desorption region 4 is such that the desorption gas H passes through the organic substance adsorbing portion 1B to the moisture adsorbing portion 1A in the rotor portion in the region, and is not yet used for desorption. First, the desorption gas H having a high value is desorbed from the zeolite Xz of the organic substance adsorption part 1B.

  That is, this increases the degree of desorption of the volatile organic substance v from the zeolite Xz in the organic substance adsorption part 1B as compared with the case where the ventilation direction of the desorption gas H in the desorption part 4 is opposite to the above direction. To ensure that the zeolite Xz of the organic substance adsorbing portion 1B is effectively adsorbed to the volatile organic substance v in the gas to be treated G after removing moisture in the next adsorption step. To do.

  Regarding the manufacture of the adsorption rotor 1, first, as shown in FIGS. 4A to 4C, first, a layered silica gel holding portion 7 a in which silica gel Xs is held on a paper holding base 7, and hydrophobicity The layered zeolite holding part 7b holding the zeolite Xz is formed adjacent to it.

  Thereafter, the paper-like holding base material 7 on which the silica gel holding portion 7a and the zeolite holding portion 7b are formed is formed into a wave shape that undulates in a direction orthogonal to the adjacent direction of the silica gel holding portion 7a and the zeolite holding portion 7b.

  Next, a plurality of the corrugated holding base materials 7 are sandwiched between the corrugated holding base materials 7 and the silica gel holding portion of the corrugated holding base material 7 is used. 7a and the zeolite holding part 7b are laminated so as to overlap each other, and thereby, between the corrugated holding base materials 7 (more specifically, between the corrugated holding base material 7 and the paper-like separator 8). A honeycomb-shaped laminated body 10 having a ventilation gap 9 is formed.

  And in this honeycomb-shaped laminated body 10, the laminated part of the silica gel holding parts Xs is used as the moisture adsorbing part 1A for holding silica gel, and the laminated part of the zeolite holding parts Xz is used as the organic substance adsorbing part 1B for holding zeolite. The honeycomb-shaped laminated body 10 is used as the above-described honeycomb structure rotor component 1x, and the moisture adsorbing portion 1A and the organic substance adsorbing portion 1B are arranged in the direction of the rotor rotational axis P (that is, in the adsorbing zone 3 and the desorbing zone 4). The gas-permeable suction rotors 1 are aligned in the gas ventilation direction.

  In addition, when manufacturing the adsorption rotor 1 with this manufacturing method, the silica gel holding | maintenance part and zeolite holding | maintenance part similar to the holding | maintenance base material 7 may be formed also in the paper-like isolation material 8. FIG.

[Another embodiment]
Next, other embodiments of the present invention will be listed.

  As shown by a broken line in FIG. 1, the frequency is 2.45 GHz or higher for adsorbed moisture heating in the vicinity of the organic substance adsorbing portion 1B of the rotor portion in the adsorption region 3 of the adsorption rotor 1 as the adsorption region side microwave irradiation means. The adsorption zone side magnetron 11 that irradiates the microwave mw may be provided in the adsorption zone 3.

  In other words, if such an adsorption zone side microwave irradiation means 11 is provided, a slight amount of moisture s remains in the gas G to be treated after the moisture s is adsorbed and removed by the silica gel Xs of the moisture adsorption unit 1A in the adsorption zone 3. Even if the residual moisture s is adsorbed on the zeolite Xz of the organic substance adsorbing portion 1B together with the volatile organic substance v as schematically shown in FIG. 6 (a), it is schematically shown in FIG. 6 (b). Thus, only the adsorbed water s is selectively efficiently heated by the irradiation microwave mw and vaporized, and the adsorbed water s is absorbed from the zeolite Xz of the organic substance adsorbing portion 1B into the gas to be treated G in the stage of the adsorption process. Can be detached.

  That is, by this, the zeolite Xz of the organic substance adsorbing part 1B can be efficiently adsorbed on the volatile organic substance v in the gas G to be treated without being affected by the moisture s. Combined with effective moisture adsorption by Xs, it can be achieved more reliably and effectively.

  As described above, the moisture s (residual moisture) desorbed from the zeolite Xz of the organic substance adsorbing portion 1B at the stage of the adsorption process as described above is the purified treated gas G ′ (treated) from which the volatile organic substance v is adsorbed and removed. Gas) and the processed gas passage 5b.

  Further, since the adsorbed moisture s in the zeolite Xz of the organic substance adsorbing part 1B is desorbed in the adsorption step, the zeolite Xz of the organic substance adsorbing part 1B in the desorption region 4 in the desorption process is shown in FIG. As schematically shown in c), only the volatile organic substance v is almost desorbed.

  When the adsorption area side microwave irradiation means 11 as described above is equipped, a breathable microwave blocking means 12 is provided at the boundary between the moisture adsorption portion 1A and the organic substance adsorption portion 1B in the adsorption rotor 1, thereby It is desirable to surely prevent the irradiation microwave mw of the region side microwave irradiation means 11 from entering the moisture adsorption portion 1A of the rotor portion in the adsorption region 3.

  In order to form such a microwave blocking means 12, for example, in the above-described adsorption rotor manufacturing method, a narrow layered metal material holding part is formed on a paper-like holding base material 7 and a silica gel holding part 7 a and a zeolite holding part. 7b is formed at the boundary portion between the moisture adsorbing portion 1A and the organic substance adsorbing portion 1B in the completed adsorbing rotor 1, and a wire mesh portion (in the figure, the moisture adsorbing portion 1A and the organic substance adsorbing portion 1B). The wire mesh portion may be used as the microwave blocking means 12 or the like.

  On the other hand, as shown by the broken line in FIG. 1 as well, as the desorption region side microwave irradiating means, the frequency of 2.45 GHz or the adsorbed moisture in the vicinity of the moisture adsorption portion 1A of the rotor portion in the desorption region 4 of the adsorption rotor 1 The desorption region side magnetron 13 that irradiates the microwave mw for heating may be provided in the desorption region 4.

  That is, if such a desorption region side microwave irradiation means 13 is equipped, a large amount of moisture s (condensed moisture) adsorbed by the silica gel Xs of the moisture adsorption unit 1 in the adsorption step in the adsorption region 3 is irradiated. Thus, a large amount of the adsorbed water s can be efficiently desorbed from the silica gel Xs of the adsorbing portion 1A to the desorption gas H.

  That is, this allows the silica gel Xs of the moisture adsorption unit 1A to be treated in the gas G to be treated in the next adsorption zone 3 in a state where the moisture desorption degree of the silica gel Xs in the moisture adsorption unit 1A is further reliably and effectively increased. Thus, the necessary amount of silica gel Xs retained in the moisture adsorption unit 1A can be further reduced, and the amount of necessary adsorbent as the entire adsorption rotor 1 can be further reduced. be able to.

  In addition, since the adsorbed moisture s can be efficiently heated by microwave irradiation, the required temperature of the desorption gas H can be reduced. This also reduces energy consumption in combination with the reduction in the amount of adsorbent required. It can be effectively reduced.

  When the adsorption zone side microwave irradiation means 11 and the desorption zone side microwave irradiation means 13 are provided, the adsorption rotor 1 is divided into a large number of adsorbent holding sections in the rotor rotation direction by a metal partition wall 1m as shown in FIG. 1a is provided, or an outer peripheral surface portion of the adsorption rotor 1 is provided with a metal peripheral wall 1n. Thereby, the irradiation microwave mw of the adsorption area side microwave irradiation means 11 and the desorption area side microwave irradiation means 13 is changed. In a state where there is no leakage, the organic substance adsorbing portion 1B in the adsorption region 3 and the moisture adsorbing portion 1A in the desorption region 4 are concentrated more efficiently and in a state including the reflected wave from the metal partition wall 1m and the metal peripheral wall 1n. You may enable it to irradiate.

  For the same purpose, it is also preferable to form the inner wall 2a and the outer wall 2b of the device case 2 with a metal material.

  In the above-described embodiment, the disk-shaped adsorption rotor 1 that allows the gas G to be processed and the desorption gas H to pass in the direction of the rotor rotation axis P in each of the adsorption zone 3 and the desorption zone 4 is shown. The adsorption rotor 1 having a silica gel-carrying moisture adsorbing part 1A and a zeolite-carrying organic substance adsorbing part 1B is formed into a cylindrical shape, and the gas G to be treated and the desorption gas H in the radial direction of the rotor in the adsorption zone 3 and the desorption zone 4 You may make it pass.

  The removal target volatile organic substance v may be any substance as long as it can be adsorbed and removed by zeolite Xz, and the gas to be treated G containing the volatile organic substance v is limited to factory exhaust gas. Any gas that is handled in various fields may be used as long as the gas contains the volatile organic substance v to be removed.

  The adsorption rotor 1 used in the adsorption rotor type gas processing apparatus of the present invention is preferably manufactured by the adsorption rotor manufacturing method of the present invention, but is not limited thereto, and an adsorption rotor manufactured by another manufacturing method is used. May be.

  The adsorption rotor type gas processing apparatus according to the present invention can be used in various fields to remove volatile organic substances contained therein from various gases.

G Gas to be treated v Volatile organic substance X (Xs, Xz) Adsorbent (silica gel, zeolite)
DESCRIPTION OF SYMBOLS 1 Adsorption rotor 3 Adsorption zone H Desorption gas 4 Desorption zone 1A Moisture adsorption part 1B Organic substance adsorption part mw Microwave for adsorption moisture heating 11 Adsorption zone side microwave irradiation means 13 Desorption area side microwave irradiation means 7 Paper-like holding group Material 7a Silica gel holding part 7b Zeolite holding part 9 Ventilation gap 10 Laminate 1x Rotor component

Claims (6)

A breathable adsorption rotor that holds an adsorbent that adsorbs volatile organic substances in the gas to be treated in a state of being dispersed in the rotor rotation direction, is provided.
An adsorption rotor type gas configured such that each portion of the adsorption rotor in the rotor rotation direction is alternately positioned in an adsorption area which is a ventilation area of the gas to be treated and a desorption area which is a ventilation area of the desorption gas by rotation of the adsorption rotor A processing device comprising:
In the adsorption rotor, a moisture adsorption part that holds silica gel as the adsorbent, and an organic substance adsorption part that holds zeolite as the adsorbent, in that order, from the upstream side in the gas flow direction of the gas to be treated in the adsorption region A structure prepared for the lined-up state ,
The ventilation direction of the desorption gas in the desorption region is a direction in which the desorption gas passes through the organic substance adsorption unit in the order of the moisture adsorption unit,
An adsorption rotor type gas processing apparatus provided with adsorption region side microwave irradiation means for irradiating the organic substance adsorption part of the rotor portion in the adsorption region of the adsorption rotor with microwaves for heating adsorption moisture . The adsorption rotor type gas processing apparatus according to claim 1 , wherein a breathable microwave blocking means is provided at a boundary portion between the moisture adsorption unit and the organic substance adsorption unit in the adsorption rotor. The adsorption rotor-type gas processing apparatus according to claim 2, wherein the microwave blocking means is the wire net-like metal material holding portion formed at a boundary portion between the moisture adsorption portion and the organic substance adsorption portion in the adsorption rotor. The adsorption rotor according to any one of claims 1 to 3, wherein a volume ratio of a silica gel retention amount in the moisture adsorption portion and a zeolite retention amount in the organic substance adsorption portion is in a range of 2: 8 to 5: 5. Gas processing equipment.   The desorption zone side microwave irradiation means which irradiates the microwave for heating adsorption moisture to the moisture adsorption part of the rotor portion in the desorption zone among the adsorption rotors is provided. The adsorption rotor type gas processing device according to item. It is a manufacturing method of an adsorption rotor used with an adsorption rotor type gas processing device given in any 1 paragraph of Claims 1-5,
To manufacture a breathable adsorption rotor that holds an adsorbent that acts to adsorb volatile organic substances in the gas to be treated in a state of being dispersed in the rotor rotation direction .
A silica gel holding part that holds silica gel as the adsorbent on a paper-like holding base and a zeolite holding part that holds zeolite as the adsorbent are formed adjacent to each other,
The silica gel formed in the holding base material in a state in which a plurality of the holding base materials formed with the silica gel holding portion and the zeolite holding portion are formed between the holding base materials. The holding parts and the zeolite holding parts are laminated so as to overlap each other with the air gap part interposed therebetween,
The laminated portion of each other the silica gel holder in the laminate material and the moisture adsorption portion and the moisture laminated portion of the zeolite holder each other in a state that said organic substance-adsorbing portion, the laminate as a rotor constituent material An adsorption rotor manufacturing method in which an adsorbing part and the organic substance adsorbing part form a breathable adsorbing rotor arranged in the direction of the gas to be treated.

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