JPH10337438A - Mobile cell type adsorption desorption device and its use method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automate an adsorption treatment of exhaust gas and a desorption treatment of an adsorption element by fitting hollow cylindrical adsorption elements opened one end and closed the other end to cylindrical adsorption cells provided with supporting wheels, arranging plural adsorption cells on the circumference of a gas shielding plate with an equal space, and circulating and moving the adsorption structural body. SOLUTION: When the exhaust gas is fed to an inlet 13 of gas to be treated, the exhaust gas is fed into the adsorption cells 1 at an adsorption station from an introduction port 11 of the gas to be treated, and is adsorbed when it passes through the hollow cylindrical adsorption elements 2..., and the treated gas is discharged from a discharge port 12. The adsorption cells 1 are circulated in a casing 4 together with the gas shielding plate 5 via the support wheel 22, and when the adsorption cells 1 move to the desorption station, a pair of movable covers 7, 8 are connected to the upper and lower both ends. Then the inside of the system is evacuated by a gas pressurizing device 10 and steam as regeneration gas is fed to desorb and a condensate in the regeneration exhaust gas is condensed with a receiver 20 and recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous gas adsorption / desorption apparatus for adsorbing and removing organic substances and the like from exhaust gas containing organic substances and the like generated in chemical factories and the like, and a method of using the same.

[0002]

2. Description of the Related Art Conventionally, a two-tank type adsorption apparatus using two adsorption tanks has been mainly used as an exhaust gas adsorption apparatus.
The two tanks are alternately used so as to perform adsorption and regeneration operations alternately. When fibrous activated carbon is used as an adsorbent used in such an adsorption apparatus, a hollow cylindrical adsorption element is mainly used, and the adsorption time is 10 to 30 minutes by utilizing the fast adsorption / desorption speed characteristics, and the desorption is performed. The switching operation is performed for a relatively short time of about 5 to 15 minutes. On the other hand, when a granular adsorbent is used as the adsorbent, it is used as a device filled in a plane or a device filled in a hollow cylinder, etc., and has a relatively long adsorption time and desorption time of several hours each. Time switching operation is being performed. In particular, when the adsorbent is formed in a hollow cylindrical shape and used, the gas passage area becomes large, so that the adsorbent is suitable for treating exhaust gas with a large air volume.

[0003] Steam is generally used as a regeneration gas used to regenerate an adsorbent that has adsorbed organic substances, and organic substances in exhaust gas are recovered as condensate. The adsorbent has a catalytic action that promotes the oxidation, decomposition, polymerization, etc. of the adsorbed material to a greater or lesser extent, and often produces an acidic substance when desorbed. For this reason, the main part of the adsorber is generally a high-grade corrosion-resistant material. There is a drawback that the apparatus is expensive because it needs to be configured. In addition, the utility line tends to fluctuate by intermittently consuming a large amount of steam at the time of desorption, and furthermore, the internal steam is released into the exhaust gas every time the operation is switched, so that white smoke,
There are problems such as mist being scattered.

[0004] In the case of treating exhaust gas with a large air volume, the above-mentioned two-tank type adsorption apparatus is provided in multiple lines, or a multi-tank type adsorption apparatus consisting of 3 to 4 or rarely 5 to 6 tanks is used. A so-called merry-go-round operation operation is performed in which the adsorption operation is performed in a plurality of other tanks while the desorption operation is performed in the tank. These require a large number of complicated switching devices, which has the disadvantage that the devices are expensive. At present, exhaust gas treatment, which has a relatively low concentration but a large air volume, is often left untouched due to high capital investment, and there is a long-awaited need for an adsorption / desorption device applicable to large air volumes. It is the current situation.

[0005] Usually, the operation of regenerating the adsorbent is performed by desorbing the adsorbed substance by utilizing the difference in the adsorbability and retention ability depending on the temperature. On the other hand, desorption of an adsorbed substance is also performed by utilizing a difference in adsorption retention ability due to pressure, and desorption is efficiently performed by using both of them. If the exhaust gas contains substances that are susceptible to deterioration, these substances may be deteriorated during the desorption process and reduce the purity of the recovered liquid or deteriorate the adsorbent. It is particularly effective to desorb at relatively low temperature. However, this method is rarely used because large vacuum pressure-resistant devices are extremely expensive.

[0006] Steam is an inert high-temperature gas and is preferable as a regenerating gas. However, steam is condensed mainly when the temperature of the adsorbent rises, so that there is a problem that the adsorbent becomes wet. Therefore, it is necessary to increase the degree of superheating of the supply steam to re-evaporate the condensed water. In particular, water remaining on the fibrous activated carbon greatly reduces the adsorption efficiency, and therefore it is desirable to remove as much as possible. The above-described vacuum desorption method is also an effective method for reducing residual moisture.

[0007] As an example of a conventional two-tank type adsorption apparatus using a hollow cylindrical adsorption element made of fibrous activated carbon, a distribution chamber for a gas to be treated and a collection chamber for a treated gas are provided, and a communicating part with each adsorption chamber is provided. Japanese Patent Publication No. 54-30917 discloses an adsorption apparatus which is provided with a switching valve mechanism which can be attached to and detached from the gas line and which communicates with a desorption gas line, and performs a switching operation between adsorption and desorption. In order to improve these, various one-tank type adsorption apparatuses having a rotation mechanism have been proposed. For example, JP-A-1-189324 discloses that a rotating drum containing fibrous activated carbon or the like on its outer periphery is intermittently rotated so as to form an adsorption zone and a desorption zone in an airtight casing,
An adsorption device having a mechanism for attaching and detaching a desorption gas inlet and outlet line to and from the drum in a desorption zone is disclosed. However, this type of apparatus has been applied only to the treatment of exhaust gas with a relatively small air volume due to its structural limitations.

On the other hand, a honeycomb rotor type concentrator has been put to practical use for treating exhaust gas having a large air volume and a low concentration. In this method, desorption is performed by using heated air instead of steam as a regeneration gas, and a concentrated gas of about 10 times is obtained. Most of the honeycomb rotor is used as an adsorption zone, and a small portion is used as a desorption zone. In the desorption zone, desorption must be performed promptly and continuously. Therefore, a dry desorption method using heated air is employed. Further, in order to facilitate desorption, the amount of adsorbent per gas passage area is very small.
As a result, the removal rate of organic substances etc. stops at around 95%,
There are problems such as inferior ability to remove organic substances and shorter life of the adsorbent than the conventional two-tank type adsorption apparatus.

As a concentrating device for the same purpose as the honeycomb rotor type concentrating device, a concentrating device in which a hollow cylindrical adsorbing element in which a mat-shaped adsorbent is mounted in a thin layer is divided into a plurality of sections and arranged as a rotor is specially provided. It is disclosed in Japanese Unexamined Patent Publication No. Hei 6-343814, Japanese Unexamined Patent Publication No. Hei 8-80418, and the like. These concentrators are limited to application to the treatment of relatively low-concentration exhaust gas as in the case of the above-mentioned honeycomb rotor, and a separate adsorber is required to recover organic substances from the concentrated gas. Requires a separate combustion device. In addition, since steam cannot be prevented from being wetted by short-time regeneration with steam, heated air has to be used as a regeneration gas, and there is a danger of fire and explosion. .

[0010]

As described above, the conventional adsorption apparatus has various problems, and an adsorption / desorption apparatus which does not have these problems and is particularly suitable for treating a large amount of exhaust gas has not yet been found. Absent. Accordingly, it is an object of the present invention to provide a high-performance and economical adsorption / desorption apparatus which rationally solves these problems and which is particularly suitable for treating exhaust gas having a large air volume.

[0011]

Means for Solving the Problems The present inventor has studied diligently,
By moving the production tank to each operation station, the above-mentioned object can be achieved by applying a moving tank type production system that simplifies the valves and piping mechanisms attached to the conventional production tank and performs production. Heading, the present invention has been reached.

That is, according to the present invention, a hollow cylindrical adsorbing element having one end opened and the other end closed is provided by a cylinder provided with a mounting port for the adsorbing element, an inlet for a gas to be treated, and a rotatable support wheel. A plurality of adsorption tanks attached to the tank in the shape of an adsorption component constituted by equally arranging on the circumference of the gas shielding plate,
A rotatable lid connected to a gas inlet to be processed, a processed gas outlet, and a regeneration gas line, and a movable lid connected to a regeneration exhaust gas line opposed to the movable lid so as to be rotatable around a central axis of the adsorption structure. A moving tank type adsorption / desorption device characterized in that a space inside the casing is erected in an airtight casing having at least one pair of lids so as to divide the space into a gas zone to be treated and a gas zone to be treated.

Another aspect of the present invention is to provide a hollow cylindrical adsorbing element having one end opened and the other end closed, a mounting port for the adsorbing element, an inlet for a gas to be treated, and a rotatable support wheel. A plurality of adsorption tanks attached to a cylindrical tank provided are equally arranged on the circumference of the gas shielding plate, and the adsorption member is rotated around the central axis of the adsorption member. Make it possible,
A gas-tight casing having at least one pair of a gas inlet to be treated, a treated gas outlet, and a movable lid connected to the regeneration gas line and a movable lid opposed to the movable lid and connected to the regeneration exhaust gas line, is provided inside the casing. An adsorption and desorption method for continuously adsorbing and desorbing an exhaust gas using a moving tank type adsorption and desorption device that is installed upright so as to divide a space into a gas to be treated zone and a treated gas zone. By rotating intermittently, the adsorption tank is circulated to the adsorption station and the desorption station, and the exhaust gas is adsorbed in the adsorption tank equipped with the hollow cylindrical adsorption element in the adsorption station, and the hollow cylinder is adsorbed in the desorption station. The above-mentioned pair of movable lids are joined to the opening of the adsorption tank in which the adsorption element is mounted, and the hollow cylindrical adsorption element is detached. Doso is a type adsorption-desorption method.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the adsorption / desorption apparatus of the present invention, a hollow cylindrical adsorption element is provided in a cylindrical tank provided with a mounting port for the adsorption element, an inlet for a gas to be treated, and a rotatable support wheel. It is attached and constitutes an adsorption tank. The cylindrical shape is not limited to a perfect cylindrical shape, but may be a substantially cylindrical shape as long as it has pressure resistance, and may include a plane as a constituent surface. The rotatable support wheel may be any device that can rotate the bottom wall or side wall of the casing without any difficulty, and may be, for example, a rolling device that exhibits the same effect as a wheel such as a spherical object. Further, those in which these rolling devices are provided in the casing and the support legs of the suction tank can rotate are also included in the rotatable support wheels of the present invention.

One end of the hollow cylindrical adsorption element is opened,
The other end is closed, and an adsorbent such as fibrous activated carbon or granular activated carbon is housed in a hollow cylindrical shape so that gas can flow therethrough. As shown in FIG. And those provided with a short path prevention ring for preventing a short path of gas.

The above-mentioned adsorption tanks are arranged equally on the circumference across the gas shielding plate, and are constituted as an adsorption component. The material of the gas shielding plate is not particularly limited, but usually a metal material such as iron is used. The present invention also includes a configuration in which the adsorption tank is disposed substantially on the gas shielding plate and a rotatable support wheel is provided on the gas shielding plate. The thickness of the gas shielding plate is not particularly limited, as long as the space in the casing can be divided into a gas zone to be treated and a gas zone to be treated. The suction structure is erected in the casing so as to be rotatable about a central axis of the suction structure.

The adsorbing tank constituting the adsorbing component is preferably implemented in 3 to 6 tanks because of its high volumetric efficiency, and in terms of efficiently performing the adsorption / desorption cycle, preferably in 4 or 6 tanks. More preferred. If the plurality of adsorption tanks are too close to each other, heat at the time of desorption is transmitted to the adjacent adsorption tank, and the adsorption effect is reduced. Therefore, it is important to arrange the plurality of adsorption tanks so that heat conduction between them is as small as possible. A member for reinforcement may be inserted between the adsorption tanks. The adsorption component rotates intermittently around the central axis of the adsorption component, and the adsorption tank cycles through the adsorption and desorption stations. Each adsorption tank is a normal cylindrical tank, and can be manufactured with high accuracy, and the adsorption component constituted by combining these can also be configured with high accuracy. On the other hand, the conventional rotating drum structure
It is difficult to manufacture with high accuracy, and it has been limited to application to small devices.

In the adsorption station, components such as organic substances in the gas to be treated are adsorbed in an adsorption tank provided with a hollow cylindrical adsorption element. Then, in the desorption station, the inlet for the gas to be treated and the outlet for the treated gas in the adsorption tank are respectively provided with a movable lid connected to the regeneration gas line and a regeneration exhaust gas line opposed to the movable lid. And joined by a pair of movable lids. When two pairs of movable lids are provided symmetrically with respect to the central axis of an adsorption structure composed of four or six tanks, it is possible to cope with exhaust gas treatment of a wide range of gas concentrations.
preferable. When treating a large amount of exhaust gas, it is also possible to combine a plurality of adsorption components according to the amount in a single casing without a partition wall. A lid is provided.

In the adsorption / desorption device of the present invention, when a gas pressure increasing device is provided in the regeneration exhaust gas line and the adsorption tank is depressurized and treated, the above-described various effects of decompression and desorption can be obtained, and the gas sealing of the adsorption tank can be achieved. This is preferable since steam during desorption does not leak and hinder the adsorption treatment.

As the adsorbent used in the present invention, various fibrous activated carbons or granular adsorbents are used. As the granular adsorbent, activated carbon, impregnated activated carbon, zeolite, or other organic or inorganic adsorbents, preferably processed into granules such as pellets or spheres are used. The average particle size of the particulate adsorbent is 1
It is preferably about 8 mm. Also, crushed ones can be used. Such fibrous activated carbon or granular adsorbent is housed in a hollow cylindrical shape and used as an adsorption element.

In the present invention, since the desorption time can be sufficiently long, a granular adsorbent having a relatively low desorption speed and a large heat capacity can be used. Therefore, it is possible to cope with an exhaust gas treatment application containing a special gas component, or an exhaust gas treatment application in which fibrous activated carbon cannot be used due to deterioration or adsorption efficiency due to a high boiling point component or the like. For example, it can be applied to adsorption and removal of special gas components using impregnated activated carbon or zeolite pellets, or pretreatment of high boiling components that degrade expensive adsorbents such as fibrous activated carbon in the main adsorption device using activated carbon pellets It can be applied to applications such as removal. In addition, it can be effectively applied to the treatment of exhaust gas with a large air volume.

When a granular adsorbent is used as the adsorbent of the hollow cylindrical adsorption element used in the adsorption / desorption device of the present invention, the particulate adsorbent can be easily provided by providing an opening mechanism at the upper end of the adsorption element. It is preferable that the granular adsorbent can be easily taken out and the drain can be easily removed by providing an on-off valve at the lower end of the adsorbing element. Further, it is preferable to provide a distribution pipe for the regeneration gas in the hollow portion of the adsorption element, since the regeneration can be performed efficiently. When the lower end of the adsorption element is tapered,
It becomes easier to take out the particulate adsorbent and drain.

A feature of the present invention is that while enjoying the advantages of a conventional multi-tank type adsorption apparatus operated in a merry-go-round system,
An advantage of the present invention is that it is possible to economically and efficiently treat a large amount of exhaust gas by simplifying a complicated valve and piping mechanism and preferably performing vacuum desorption. The volumetric efficiency is high, and the number of adsorption tanks conforming to a normal adsorption / desorption cycle is 3 to 6, preferably 4 or 6 tanks to constitute an adsorption component. For example, by performing desorption processing in one tank while performing adsorption processing in a plurality of tanks, the amount of adsorbent used can be reduced as compared with a conventional two-tank adsorption apparatus, and the amount of utility used can be leveled. . In addition, usually, adsorption components leak easily from the adsorption tank immediately after desorption and immediately before desorption. However, by performing the adsorption treatment in parallel with a plurality of tanks, the above-described adsorption tank is compared with the conventional two-tank adsorption apparatus. The amount of leak can be significantly reduced.

Although steam is often used as a regeneration gas, leakage of steam hinders the adsorption process. Therefore, in the case of the adsorption / desorption device of the present invention which performs adsorption / desorption in the same casing, it is important to prevent steam leakage. For that purpose, a complicated mechanism for tightly joining the adsorption tank and the movable lid is required, but in the case of the present invention, the adsorption tank and the movable lid are joined by a simple mechanism, preferably automatically by reducing the pressure. An even adhesion force is applied to the joint surface, and complete gas sealing is performed. The regeneration gas whose volume has been increased by the degree of pressure reduction is supplied to each of the adsorption tanks divided into relatively small volumes, and the effect of equalizing the flow of the regeneration gas to the adsorbent layer can also be obtained. Further, the effect of improving the replacement property of the gas in the adsorption tank by the regeneration gas is also obtained.

After the desorption is completed, the remaining steam is suction-replaced under reduced pressure, the pressure is released, and then the pair of movable lids are removed. The gas to be treated is passed to cool the adsorption tank. The separation interval between each movable lid and the adsorption tank can be appropriately adjusted so that an appropriate amount of the gas to be processed flows. By this series of operations, scattering of white smoke and mist during switching is prevented. In the present invention, the case of desorption under reduced pressure is mainly described, but it goes without saying that desorption under normal atmospheric pressure is also possible.

Each of the adsorption tanks is mainly composed of only the body and is divided into relatively small parts, so that vacuum pressure resistance or corrosion resistance can be imparted economically. The portion other than the exhaust gas portion of the desorbed gas may be made of ordinary steel. Further, since the adsorption tank is housed in the casing, there is an advantage that the adsorption tank is not affected by outside air. For exhaust gas treatment with a large air volume, a plurality of adsorption components can be accommodated in one common casing to perform parallel processing. As the gas concentration becomes higher, the adsorption time becomes shorter and approaches the desorption time. In this case, as described above, two movable lids are provided, for example, when the movable lid is constituted by a set of four tanks. By configuring so as to be able to desorb in two tanks while adsorbing in two tanks, it is possible to perform the same processing as in a conventional two-tank adsorption apparatus. Therefore, the adsorption / desorption device of the present invention can be applied to a wide range of exhaust gas treatment applications.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described specifically with reference to the drawings, but the present invention is not limited thereto. FIG. 1 is a sectional elevation view of the suction device of the present invention, and FIG. 2 is a sectional plan view of the same. Reference numeral 1 denotes an adsorption tank provided with a mounting port 3 for a hollow cylindrical adsorption element 2 and an inlet 11 for a gas to be treated. The hollow cylindrical adsorbing element 2 is mounted on a plurality of adsorbing tanks, arranged equally on the circumference of the gas shielding plate 5, and configured as an adsorbing component. The adsorption structure has an outer peripheral end and a center of the gas shielding plate connected to the liquid seal 15 and the rotating shaft 6, respectively, and further includes a plurality of supporting wheels 22, and a driving device around the central axis. The space inside the casing is divided into a gas zone to be processed 27 and a gas zone to be processed by the gas shield plate and the liquid seal. Reference numeral 13 denotes an inlet for the gas to be treated, and the treated gas is discharged from the treated gas outlet 12 and discharged from the treated gas outlet 14. FIG. 2 shows an example in which four pieces are accommodated in one adsorption tank, but the number and arrangement are arbitrary.

In the case where fibrous activated carbon is used as the adsorbent, a fibrous activated carbon felt is laminated in a hollow cylindrical shape around a permeable core material passed between a perforated flange and a non-perforated flange to form an adsorbing element. I do. The thickness of the adsorption layer is 50-200m
m. When a particulate adsorbent is used, the particulate adsorbent is filled into an annular portion formed of a gas-permeable double wall material extending between a perforated flange and a non-perforated flange to form an adsorption element. The thickness of the adsorption layer is preferably about 100 to 400 mm. Reference numeral 19 denotes a distribution pipe for the regeneration gas, which has, for example, a large number of blowout holes, the end of which is loosely fitted to the regeneration gas nozzle provided on the movable cover 7 at the time of detachment, and the regeneration gas is appropriately distributed. Is what you do.

The above-mentioned adsorbing structure rotates intermittently by 90 degrees, and circulates through each adsorbing tank to the adsorbing station and the desorbing station. In the desorption station, a pair of movable lids 7 and 8 are provided on the casing such that the pair of movable lids 7 and 8 face each other at positions corresponding to the inlet of the gas to be processed and the outlet of the processed gas in the adsorption tank. Flexible tube 2 is attached to movable lid 7
5. The regeneration gas line 23 is connected via the valve 26,
The movable lid 8 is also connected to a regeneration exhaust gas line 24. Reference numerals 17 and 18 denote driving devices such as air cylinders connected to the movable lid, each of which may be composed of a plurality of driving devices. The regeneration exhaust gas line 24 includes a condenser 9 such as a multi-tube heat exchanger and a gas booster 10 such as a Nash vacuum pump, a Roots blower or a turbo fan.
Is provided.

The movable lid is a lid such as a flat plate having pressure resistance, and is connected to the adsorption tank via gaskets. As described above, two pairs of movable lids may be provided symmetrically with respect to the central axis of the adsorption structure (not shown), and in this case, high-concentration exhaust gas processing can be handled. The movable lid 7 may be joined so as to cover the treated gas discharge port from the adsorption tank as shown in FIG. 1, but may be provided for each opening 12 of each adsorption element. Also, the entire adsorption element is stored in the adsorption tank,
It may be of a type that is joined to a treated gas collecting outlet provided in the adsorption tank.

Exhaust gas is supplied from a gas inlet 13 to be treated and a gas inlet 11 to be treated, and flows through an adsorption tank in an adsorption station to perform an adsorption process.
And discharged into the atmosphere from the treated gas outlet 14. A pair of movable lids 7 and 8 are joined to the adsorption tank moved to the desorption station, the pressure in the system is reduced to below atmospheric pressure by the gas pressure booster 10, steam is supplied as a regeneration gas, and desorption is performed under reduced pressure. , Receiving condensed components from regenerated exhaust gas
Condensed and recovered to 0. Decompression degree depends on the exhaust gas component, etc.
It is good to set it in the range where the pressure inside the adsorption tank becomes 750 to 100 mmHgabs. After a certain period of time, the supply of steam is stopped, the atmosphere is introduced from the atmosphere valve 21 to replace and condense the steam remaining in the system, and after the replacement is completed, the pressure increasing device is stopped to release the pressure reduction. Close. Next, the pair of movable lids 7 and 8 are separated from the adsorption tank, and the inside of the system is cooled by flowing the gas to be treated. After the above operation is completed, the adsorption structure is rotated by 90 degrees and moved to the adsorption station, and at the same time, the adsorption tank to be desorbed next is moved to the desorption station. An inert gas line such as nitrogen may be connected to the atmospheric valve, and the gas in the adsorption tank may be replaced with an inert gas.

FIG. 3 is a sectional elevation view showing an example in which a plurality of adsorbing members are accommodated in one casing, and in this case, it is possible to cope with exhaust gas treatment with a large air volume. The hollow cylindrical adsorption element is provided with a maintenance port 3 provided in the casing.
It is good to be able to take in and out from 5, 36. When a granular adsorbent is used, the adsorbing element may be provided with a mechanism for taking in and out the adsorbent, and the adsorbent may be renewed from a maintenance port provided in the casing in a state where the adsorbent is attached to the adsorption tank.

FIG. 4 is a sectional elevation view showing an example of a hollow cylindrical adsorbing element capable of renewing a granular adsorbent in an installed state. A hollow cylindrical adsorption element whose upper end is opened, the lower end is tapered, and the end is closed by a lower opening / closing valve 29 is erected in an adsorption tank, and an upper flange 32 is attached. At this time, the short path preventing ring 3 integrated with the upper flange
0 may be provided so as to penetrate the adsorbent layer to prevent a short path of gas at the upper end of the adsorption element.
The annular opening formed between the inner wall of the upper flange and the inner wall of the suction element is closed by inserting and attaching an opening closing ring 33.

When updating the particulate adsorbent, the maintenance ports 35 and 36 provided in the upper and lower casings of an arbitrary adsorption station are opened to perform an update operation. The discharge of the particulate adsorbent is performed by opening and closing the lower opening / closing valve, and the supply of the particulate adsorbent is performed by removing the opening closing ring and attaching the charging shooter 34 toward the annular opening, or by using the upper flange. And remove from the opening at the top of the adsorption element. In this manner, by performing the same operation by intermittently rotating the adsorption structure, the granular adsorbent in all the adsorption tanks can be updated.

Further, when a non-combustible material such as zeolite is used as the granular adsorbent, heated air can be used relatively safely instead of steam as the regeneration gas. In addition, by providing a heater at the subsequent stage of the gas pressure increasing device and providing a loop line connected to the regeneration gas line, a normal dry desorption method (not shown) using an inert gas such as nitrogen can be employed. The gas seal for dividing the gas zone is not limited to the liquid seal, and may be a gas seal using a gasket or the like. The rotation driving method of the suction structure is not limited to the method of driving the center rotation axis, but may be the method of driving the outer periphery of the suction structure. In addition, configuration changes without departing from the spirit of the present invention are possible.

[0036]

According to the adsorption / desorption device of the present invention, it is possible to efficiently and economically recover organic substances and the like from exhaust gas having a large air volume, which has been difficult in the past. Can be rationally solved. In addition, vacuum desorption, which has been difficult in the past, can be economically realized, and it is effective in improving the purity of the recovered liquid, preventing white smoke, and the like. Further, it can be replaced with a conventional two-tank adsorption apparatus used for treating exhaust gas having a relatively high concentration, and can be applied to a wide range of exhaust gas treatment applications.

[Brief description of the drawings]

FIG. 1 is a sectional elevation view showing an example of the adsorption / desorption device of the present invention.

FIG. 2 is a cross-sectional plan view showing an example of the adsorption / desorption device of the present invention.

FIG. 3 is a sectional elevation view showing another example of the adsorption / desorption device of the present invention.

FIG. 4 is a sectional elevation view showing another example of the adsorption / desorption device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adsorption tank 2 Hollow cylindrical adsorption element 3 Hollow cylindrical adsorption element mounting opening 4 Casing 5 Gas shielding plate 6 Rotating shaft 7 Movable lid 8 Movable lid 9 Condenser 10 Gas pressure booster 11 Gas inlet to be treated 12 Treated gas exhaust Outlet 13 Gas to be treated inlet 14 Treated gas outlet 15 Liquid seal 16 Driving device 17 Driving device 18 Driving device 19 minutes piping 20 Receiver 21 Atmospheric valve 22 Support wheel 23 Regeneration gas line 24 Regeneration exhaust gas line 25 Flexible tube 26 Valve 27 Gas to be treated 28 Treated gas zone 29 Lower opening / closing valve 30 Short path preventing ring 31 Support 32 Upper flange 33 Opening closing ring 34 Input shooter 35 Maintenance port 36 Maintenance port

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B01J 20/28

Claims (11)

[Claims] 1. A hollow cylindrical adsorption element having one end opened and the other end closed is placed in a cylindrical tank provided with a mounting port for the adsorption element, an inlet for a gas to be treated, and a rotatable support wheel. A plurality of adsorption tanks mounted on the gas shielding plate are equally arranged on the circumference of the gas shielding plate. The casing inner space is covered in an airtight casing provided with an inlet, a treated gas outlet, a movable lid connected to the regeneration gas line, and at least one pair of movable lids connected to the regeneration exhaust gas line opposed to the movable lid. A moving tank type adsorption / desorption device, which is set up so as to be divided into a processing gas zone and a processed gas zone. 2. The moving tank type adsorption / desorption apparatus according to claim 1, wherein said adsorption tank is 3 to 6 tanks. 3. The adsorption tank according to claim 1, wherein the number of the adsorption tanks is four or six.
Mobile tank type adsorption / desorption device. 4. The moving tank type adsorption / desorption device according to claim 1, wherein a pressure increasing device is provided in the regeneration exhaust gas line. 5. The moving tank type adsorption / desorption device according to claim 3, wherein two pairs of the movable lids are provided symmetrically with respect to the rotation center axis of the adsorption structure. 6. The moving tank type adsorption / desorption apparatus according to claim 1, wherein the adsorbent is fibrous activated carbon. 7. The method according to claim 1, wherein the adsorbent is a granular adsorbent.
6. The moving tank type adsorption / desorption device according to any one of items 1 to 5, 8. The moving tank type adsorption / desorption device according to claim 7, wherein the hollow cylindrical adsorption element has an open upper end and an open / close valve at a lower end, and an annular opening at an upper end is closed by an upper flange and an opening closing ring. . 9. The moving tank type adsorption / desorption apparatus according to claim 1, wherein a distribution pipe for a regeneration gas is provided in a hollow portion of the hollow cylindrical adsorption element. 10. A hollow cylindrical adsorbing element having one end opened and the other end closed is placed in a cylindrical tank provided with a mounting port for the adsorbing element, an inlet for a gas to be treated, and a rotatable support wheel. A plurality of adsorption tanks mounted on the gas shielding plate are equally arranged on the circumference of the gas shielding plate. The casing inner space is covered in an airtight casing provided with an inlet, a treated gas outlet, a movable lid connected to the regeneration gas line, and at least one pair of movable lids connected to the regeneration exhaust gas line opposed to the movable lid. An adsorption and desorption method for continuously adsorbing and desorbing exhaust gas using a moving tank type adsorption and desorption device that is provided upright so as to be divided into a processing gas zone and a processed gas zone, wherein the adsorption component is intermittently interposed. By rotating, the above adsorption tank is The exhaust gas is circulated to the adsorption and desorption station, the exhaust gas is adsorbed in the adsorption tank equipped with the hollow cylindrical adsorption element in the adsorption station, and the pair of the pair is inserted into the opening of the adsorption tank in which the hollow cylindrical adsorption element is adsorbed in the desorption station. A moving tank type adsorption / desorption method, wherein a movable lid is joined to perform a desorption process of a hollow cylindrical adsorption element. 11. The moving tank type adsorption / desorption method according to claim 10, wherein the desorption processing is performed in the desorption station while the pressure in the adsorption tank is reduced.