JP4972605B2 - VOC gas processing apparatus and filter cleaning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a VOC gas treatment apparatus capable of inhibiting the deposition of an inorganic component contained in mist of a coating material to thereby realizing not only reduced load on a cleaning work but also a prolonged continuous operation owing to a suppressed increase in pressure loss due to filter medium clogging. <P>SOLUTION: An adsorption filter unit 14 encased in a cylindrical adsorption cartridge 5 includes a cylindrical filter medium 18, a cylindrical scraping member 19 having an inside diameter larger than the outside diameter of the filter medium 18 so as to surround the filter medium 18, a clip 21 that supports the scraping member 19 in such a manner that it is positionally variable in order to allow contact between the external circumferential surface near the ridgeline of the filter medium 18 and the internal circumferential surface of the scraping member 19, and a wire gauze holding member 22. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a VOC gas treatment apparatus and filter cleaning for removing volatile organic compounds (hereinafter referred to as “VOC”) such as benzene, xylene, and toluene contained in inks and paints used in printing / painting plants and the like. Regarding the method.

  Conventionally, various VOC gases such as benzene, xylene, and toluene are generated in paint factories, printing factories, chemical factories and the like due to chemical substances of raw materials such as ink, paint, and adhesive.

  Such VOC gas is detoxified by using a VOC gas processing apparatus from the viewpoint of bad odor pollution and prevention of photochemical oxidant formation.

  In addition, the VOC gas processing apparatus includes a rotor in which a plurality of adsorption cartridges containing adsorption units are arranged in an annular shape, and contains fine particles such as paint mist from one end of the adsorption cartridge while rotating the rotor intermittently. It is known that exhaust gas is introduced and combustible VOC and fine particles are adsorbed by an adsorption unit (see, for example, Patent Document 1).

  At this time, the VOC gas processing apparatus includes a solvent desorption station section for desorbing the solvent by introducing hot air into the rotation region of the rotor, and a fine particle processing station section for burning or reducing the amount of paint mist adhering to the adsorption unit. To form an organic solvent adsorption / desorption regeneration cycle, and the clogging of the adsorption cartridge is suppressed by the disappearance or reduction of the adhering paint mist, thereby extending the life of the cartridge.

Moreover, as a VOC gas removal filter used for the adsorption unit of such a VOC gas processing apparatus, it has an inner and outer two-layer structure made of an inorganic fiber, and either one of these inner and outer layers. There is also known a technology that enables the removal of VOC gas adsorbed using high-temperature air and regeneration of the adhering paint by thermal decomposition by supporting synthetic zeolite in the body while maintaining heat resistance and durability ( For example, see Patent Document 2).
Japanese Patent Laid-Open No. 2006-2889 JP 2008-049287 A

  However, when VOC gas is adsorbed / desorbed by using a VOC gas processing apparatus at a printing / painting factory, etc., the organic matter contained in the paint mist is heated by a high-temperature gas of about 500 ° C. in the fine particle processing station. It is possible to remove and reduce the amount by vaporizing the components, but only some of the inorganic components contained in the paint mist cannot be vaporized with the high-temperature gas and gradually accumulate while adhering to the VOC gas removal filter. The problem that it ends up has arisen.

  In addition, when an organic resin paint is used when printing or painting an object, it is appropriate to provide weather resistance, acid resistance, heat resistance, and wear resistance in the object after printing or painting. It is necessary to include an inorganic component.

  Since this inorganic component itself is more heat resistant than a normal organic component, it is difficult to remove in the process of removing and reducing the paint mist as described above, and the paint mist cannot be thermally decomposed. There is also a problem that the inorganic component contained in the film remains attached to the surface of the VOC gas removal filter and increases the loss of the filter pressure.

  Therefore, in the VOC gas removal filter, it is necessary to perform filter cleaning in order to remove the inorganic components adhering periodically.

  Specifically, after removing the adsorption filter cartridge from the VOC processing apparatus, disassembling the adsorption filter cartridge and taking out the internal adsorption filter unit, scraping off and sucking the inorganic components adhering to the surface, etc. Had gone.

  Furthermore, since such complicated operations such as removal, disassembly, and suction need to be performed for all of the plurality of adsorption filter cartridges, not only the workload of the cleaning operator is large, but also the efficiency of printing and painting operations. It was also a factor of decline.

  Therefore, in consideration of the above circumstances, the present invention can suppress the deposition of inorganic components contained in the paint mist and not only reduce the cleaning work load, but also filter pressure loss due to clogging of the filter medium. An object of the present invention is to provide a VOC gas treatment device and a filter cleaning method that can realize long-term continuous operation while suppressing an increase in the amount of water.

A VOC gas processing apparatus of the present invention comprises a cylindrical adsorption cartridge containing an adsorption filter unit, a rotor in which a plurality of adsorption cartridges are arranged adjacent to each other in the circumferential direction, and a drive device that rotates the rotor. In the VOC gas processing apparatus for processing VOC gas by supplying VOC gas contained in a raw material chemical substance to the plurality of adsorption cartridges while intermittently rotating a rotor, the adsorption filter unit includes a cylindrical filter medium, and the filter A cylindrical sliding contact member having an inner diameter larger than the outer diameter of the filter medium so as to surround the filter medium, and an outer peripheral surface of the filter medium and an inner peripheral surface of the sliding contact member A supporting member that displaceably supports the sliding contact member so as to come into contact with its own weight, and rotation of the suction cartridge with respect to rotation in one direction of the rotor The filter medium and the sliding contact member are allowed to rotate in the one direction in conjunction with a change in force, and the filter medium in the filter medium is interlocked with a rotation posture change of the adsorption cartridge with respect to the rotation in the other direction of the rotor. pendulum member for generating a sliding between the inner peripheral surface of the outer peripheral surface and the sliding member of said filter medium to prevent rotation in the other direction of the sliding member while permitting rotation in the other direction And.

  According to the VOC gas treatment device of the present invention, when an inorganic component that is difficult to remove contained in the raw material is fixed to or remains on the outer periphery of the filter medium, the outer surface of the filter medium and the inner peripheral surface of the sliding member The inorganic component adhering to the outer surface of the filter medium can be removed by sliding, and an increase in pressure loss due to clogging of the filter medium can be suppressed.

  Further, the adsorption cartridge stores a plurality of adsorption filter units, and each of the plurality of adsorption filter units is provided with the pendulum member.

  According to the VOC gas treatment device of the present invention, the outer surface of the filter medium and the inner peripheral surface of the sliding member can be independently slid by the pendulum member provided in each adsorption filter unit.

Further, the adsorption cartridge stores a plurality of adsorption filter units, and the plurality of adsorption filter units include an adsorption filter unit disposed at the center, and a plurality of other adsorption filters connected to the central adsorption filter unit by gears. The suction filter unit is configured to be interlocked so as to maintain the same phase, and one pendulum member is provided in the central suction filter unit.

  According to the VOC gas processing apparatus of the present invention, the pendulum member provided in one adsorption filter unit interlocks the plurality of adsorption filter units to slide the outer surface of the filter medium and the inner peripheral surface of the sliding member. be able to.

The filter cleaning method of the VOC gas processing apparatus of the present invention includes a plurality of cylindrical adsorption cartridges containing adsorption filter units in the circumferential direction and intermittently rotating a rotor, and the plurality of adsorption cartridges include raw chemicals. Cleaning method of a VOC gas processing apparatus for processing VOC gas by supplying VOC gas to be processed, and having a cylindrical shape that constitutes the adsorption filter unit in conjunction with a change in the rotation posture of the adsorption cartridge accompanying rotation of the rotor The outer periphery of the filter medium by preventing the rotation of the cylindrical sliding contact member having an inner diameter larger than the outer diameter of the filter medium so as to allow the rotation of the filter medium and surround the filter medium. Sliding between the surface and the inner peripheral surface of the sliding contact member due to its own weight. Characterized in that for cleaning the outer circumferential surface of the motor filter medium.

  According to the filter cleaning method of the VOC gas treatment apparatus of the present invention, even if an inorganic component that is difficult to remove contained in the raw material adheres to the outer periphery of the filter medium, it adheres to the surface of the filter medium by sliding of the sliding contact member. Inorganic components can be removed, and an increase in pressure loss due to clogging of the filter medium can be suppressed.

  The VOC gas treatment device and the filter cleaning method of the present invention can suppress the deposition of inorganic components contained in the paint mist and reduce the burden of cleaning work, as well as the filter pressure accompanying clogging of the filter medium. Long-term continuous operation can be realized while suppressing an increase in loss.

  Next, a VOC gas processing apparatus according to an embodiment of the present invention will be described with reference to the drawings. The following embodiments are preferred specific examples of the present invention and may have various technically preferable limitations. However, the technical scope of the present invention is not limited to the description of the present invention. As long as it is not limited to these embodiments.

  Hereinafter, an embodiment of the VOC gas processing apparatus according to the present invention will be described with reference to the drawings.

(VOC gas processing equipment)
First, the system configuration of the VOC gas processing apparatus according to the present invention will be described with reference to FIG. FIG. 1 is a block diagram illustrating a system configuration of a VOC gas processing apparatus according to an embodiment of the present invention.

  In FIG. 1, a VOC gas processing apparatus 1 of the present invention includes a rotatable rotor 2.

  The rotor 2 has an adsorption station unit V that takes in untreated gas (exhaust gas) from a painting booth or the like (not shown) through an intake duct D1 and adsorbs flammable volatile organic compounds or fine particles contained in the exhaust gas, and 150 A solvent desorption station W for desorbing an organic solvent contained in the exhaust gas by introducing hot air heated to ˜200 ° C., paint mist, etc. by introducing hot air heated to a high temperature of 550 to 600 ° C. And a fine particle processing station section X for incinerating or reducing the amount of fine particles.

  The untreated gas sucked into the adsorption station unit V is sucked by the first exhaust fan F1 for discharging the clean gas after the organic solvent is absorbed from the discharge duct D2.

  The hot air introduced into the solvent desorption station section W is heated to 150 to 200 ° C., which is equal to or higher than the boiling point of the organic solvent, by the first heater H1, and is introduced from the solvent desorption station inlet duct D3. The air containing the organic solvent desorbed by the solvent desorption station section W is sent from the solvent desorption station outlet duct D4 to the second heater H2 that is heated to 200 to 250 ° C. where the catalyst can be combusted.

  In the fine particle processing station section X, high-temperature gas after combustion and decomposition of the air containing the desorbed organic solvent heated by the second heater H2 to 550 to 600 ° C. in the catalyst section C is introduced from the fine particle processing station inlet duct D5. Is done. The high-temperature gas after the fine particles are processed in the fine particle processing station section X is sent from the fine particle processing station outlet duct D6 to the heat exchanger HE.

  The second heater H2 and the catalyst part C constitute a desorbing solvent combustion part. Further, the heat exchanger HE has exhaust gas cooled from 400 ° C. to 40 ° C. on the heat radiating side exhausted from the second exhaust fan F2, warms the atmosphere to 150 ° C. on the heat receiving side, and then enters the first heater H1. be introduced.

(Configuration of rotor 2)
Next, a specific configuration of the rotor 2 will be described with reference to FIGS.

  2 is a perspective view of a rotor applied to a VOC gas processing apparatus according to an embodiment of the present invention. FIG. 3 is an exploded perspective view of a rotor applied to a VOC gas processing apparatus according to an embodiment of the present invention. 4 is a front view of a rotor applied to a VOC gas processing apparatus according to an embodiment of the present invention.

  2 to 4, the rotor 2 is supported and surrounded by a frame 3 combined in a casing shape, and a pair of disk-like rotor plates 4 and 4 that face each other in a separated state, and a pair of rotor plates. A plurality of adsorbing cartridges 5 that are annularly arranged adjacent to each other along the peripheral edge so as to be sandwiched between the four rotating shafts 4, the rotating shaft 6 that rotates the pair of rotor plates 4, 4, and the pair of rotor plates 4 4, an intake chamber 7 communicated with the suction duct D <b> 1 and an exhaust chamber 8 communicated with the exhaust duct D <b> 2. Further, the rotor 2 rotates about the rotation shaft 6 by the drive of the motor 9 (see FIG. 4). At this time, the rotor 2 rotates in the clockwise direction N of FIG. 4 and realizes the VOC gas adsorption / desorption cycle during one rotation (for example, the required time of 24 minutes).

  In addition, in FIG. 4, the code | symbol of the structural member located in the back side is attached | subjected to the code | symbol of the structural member located in the front side in brackets.

  In addition, the rotation of the rotor 2 described above is intermittently performed. For example, the first exhaust fan F1 is operated for suction every several minutes of adsorption operation / desorption cycle, and the rotor 2 is rotated at a certain angle (for example, 30 degrees). ) The intermittent rotation operation of rotating and stopping at every time is repeated.

(Configuration of rotor plate 4)
Each rotor plate 4, 4 has, for example, twelve communication ports 4 a and short tubes (spacers) 4 b arranged coaxially, with the communication ports 4 a of each rotor plate 4, 4 facing each other. The twelve suction cartridges 5 are sandwiched between the rotor plates 4 and 4.

  Each of the chambers 7 and 8 is supported by the frame 3 so as to cover 10 out of the 12 communication ports 4a... Except 2 near the bottom dead center during rotation. Further, annular openings 7a and 8a communicating with the ten communication ports 4a are formed on the inner wall surfaces of the chambers 7 and 8, respectively.

  Thus, in the present embodiment, the twelve adsorption cartridges 5... Use 10 as the adsorption station unit V, except for two when they are located at the bottom dead center, as the adsorption / desorption cycle of the VOC gas. One of the two at the bottom dead center (upstream in the rotor rotation direction) is used as the solvent desorption station unit W, and the other (downstream in the rotor rotation direction) is used as the particle processing station unit X.

  During rotation of the rotor 2 in the VOC gas adsorption / desorption cycle, the communication port 4a when positioned at the solvent desorption station section W is communicated with the ducts D3 and D4 and is positioned at the particle processing station section X. In this case, the communication port 4a ... communicates with the ducts D5, D6.

  Further, the suction cartridges 5 are fixed at the peripheral edge of the rotor 2. Therefore, the portion located at the top dead center (ridgeline) of each of the suction cartridges 5 is displaced so that the rotational posture is shifted by 360 degrees during one rotation cycle of the rotor 2.

  By the way, the position of the communication port 4a used as the solvent desorption station unit W and the particle processing station unit X is not limited to the position at the bottom dead center described above, but at least two adjacent communication ports are connected. Use the mouth 4a.

  Further, the number of communication ports 4a used as the adsorption station section V is nine, and a cooling station section for cooling by introducing cold air into the adsorption cartridge 5 is arranged at the next cycle position of the particle processing station section X. You may do it.

(Configuration of suction cartridge 5)
Next, a specific configuration of the suction cartridge 5 will be described with reference to FIGS.

  FIG. 5 is an exploded perspective view of an adsorption cartridge applied to a VOC gas processing apparatus according to an embodiment of the present invention, and FIG. 6 is a front view of the adsorption cartridge applied to a VOC gas processing apparatus according to an embodiment of the present invention. (Intake side), FIG. 7 is a rear view (exhaust side) of an adsorption cartridge applied to the VOC gas processing apparatus according to one embodiment of the present invention, and FIG. 8 is a VOC gas processing apparatus according to one embodiment of the present invention. It is sectional drawing of the adsorption cartridge applied.

  5 to 8, the suction cartridges 5 are formed in a cylindrical shape in which an annular outer flange 10a (intake side) and an inner flange 10b (exhaust side: see FIG. 8) are integrally formed at both ends and the handle 11 is fixed. A cylindrical body 10, lid bodies 12 and 13 that close both ends of the cylindrical body 10, and a plurality of adsorption filter units 14... That are housed in the cylindrical body 10 and sandwiched between the lid bodies 12 and 13. Yes.

  The lid bodies 12 and 13 are fixed to the flanges 10a and 10b of the cylindrical body 10 by screws 15 ... and screws 16 ..., and a plurality of vent holes 12a ... and vent holes 13a ... are formed respectively. Yes. The adsorption filter units 14 are fixed by bolts 17 on the lid 12 side. Further, in order to support one end side of the adsorption filter units 14..., Annular flanges 13 b... Protruding so as to surround the vent holes 13 a.

  As a result, in the adsorption cartridges 5..., The paint mist is introduced into the cylindrical body 10 from the vent holes 12 a of the lid 12 during the VOC adsorption operation, passes through the adsorption filter units 14, and the vent holes 13 a of the lid 13. The filtered air is discharged (see arrow in FIG. 8).

(Configuration of adsorption filter unit 14)
Next, a specific configuration of the adsorption filter units 14... Will be described based on FIGS.

  FIG. 9 is an exploded perspective view of an adsorption filter unit applied to a VOC gas processing apparatus according to an embodiment of the present invention. FIG. 10 is an illustration of an adsorption filter unit applied to a VOC gas processing apparatus according to an embodiment of the present invention. FIG. 11 is a sectional view of an adsorption filter unit applied to a VOC gas processing apparatus according to an embodiment of the present invention.

  9 to 11, the adsorption filter unit 14... Is a filter medium 18 that is cylindrical with an outer layer material 18 a and an inner layer material 18 b, and a scraper as a cylindrical sliding contact member that surrounds the outer periphery of the filter medium 18. A take-off member 19, a bottomed cylindrical filter holding member 20 that holds one end side of the filter medium 18, and one end side of the scraping member 19 are held via a plurality of (for example, four) clips 21 and a filter A bottomed cylindrical wire mesh holding member 22 through which a shaft portion 20a protruding from the center of the holding member 20 passes is configured.

  The filter medium 18 is, for example, an outer layer material 18a for removing paint mist composed of a glass fiber filter such as polycrystalline alumina fiber, and an inner layer material 18b for VOC adsorption composed of a ceramic filter in which zeolite is held. It is said that.

  The scraping member 19 is a wire mesh having a relatively coarse mesh, and has an inner diameter larger than the outer diameter of the filter medium 18, so that the scraping member 19 has its own weight on the outer surface of the filter medium 18. Contact dead center.

  The filter holding member 20 defines the central axis excluding the scraping member 19 by supporting each member from the wire mesh holding member 22 to the cover 28 by the central shaft portion 20a.

  On the other hand, each adsorption filter unit 14 is provided with an independent pendulum unit F.

  The pendulum unit F includes a washer (spacer) 23 that is interposed between the filter holding member 20 and the wire mesh holding member 22 and through which the shaft portion 20a passes, and the shaft portion 20a on the outside (intake side) of the wire mesh holding member 22. Between the pendulum substantially penetrating the pendulum 24, the small pendulum presser plate 25 fixed to the large pendulum 24 on the same axis as the rotation center of the large pendulum 24, and one end between the large pendulum 24 and the small pendulum presser plate 25 A small pendulum 26 supported so as to be able to swing, and a plurality of (for example, twelve) claw portions 27a to which the free end of the small pendulum 26 is locked projecting toward the rotation center side. A member 27 and a cover 28 for sandwiching the large pendulum 24, the small pendulum presser plate 25, and the locking ring member 27 with the wire mesh holding member 22 are provided.

  The large pendulum 24 is formed in a substantially semicircular shape (fan shape) using a material having a high specific gravity, and is suspended from the shaft portion 20a so as to always maintain a posture suspended downward by its own weight. .

  The small pendulum retainer plate 25 has a substantially oval shape made of a thin metal plate or the like. A through hole 25a through which the shaft portion 20a passes is formed on one end side, and one end of the small pendulum 26 is supported near the other end. A support hole 25b is formed.

  One end of the small pendulum 26 is supported between the large pendulum 24 and the small pendulum holding plate 25, and the other end (free end) can be engaged with the claw portions 27a. At this time, the posture of the small pendulum 26 is in a ratchet relationship that engages with the claw portions 27a in only one rotation direction and rides on the claw portions 27a in the other rotation direction. The large pendulum 24 is formed with recesses 24 a that define the swing range of the small pendulum 26.

(Explanation of scraping operation (cleaning operation))
Next, a scraping operation (cleaning operation) using the adsorption filter units 14 of the embodiment of the present invention will be described.

  12 and 13 are operation explanatory views of the main part of the adsorption filter unit applied to the VOC gas processing apparatus according to one embodiment of the present invention.

  Here, among the adsorption cartridges 5... Arranged in the rotor 2 (illustrated by the rotor plate 4 in FIG. 12), for example, the one located near 3 o'clock shown in FIG.

  As shown in FIG. 12, in the three suction filter units 14 arranged inside the suction cartridge 5, when the rotation direction of the rotor 2 is the clockwise direction N, the rotation posture of the suction cartridge 5 is interlocked. If the phase of the locking ring member 27 also shifts in the clockwise direction M, which is the same as the clockwise direction N, the tip of the small pendulum 26 is only pushed up by the claw portions 27a of the locking ring member 27. The phase shift of the ring member 27 is allowed.

  Thereby, since the scraping member 19 connected to the locking ring member 27 can also rotate in the clockwise direction M, as a result, the filter medium 18 also rotates in the clockwise direction M (changes the posture). Almost no sliding occurs between the inner surface of the scraping member 19 and the outer surface of the filter medium 18.

  On the other hand, as shown in FIG. 13, when the rotation direction of the rotor 2 is the counterclockwise direction −N, the locking ring member 27 is also phased in the counterclockwise direction −M in conjunction with the rotation posture change of the suction cartridge 5. If it is attempted to shift, the claw portions 27a of the locking ring member 27 and the tip of the small pendulum 26 come into contact with each other and get caught, and further locking of the locking ring member 27 in the counterclockwise direction -M is prevented. Is done. This is within the range of the moment due to the weight of the large pendulum 24, and the locking ring member 27 tries to maintain the posture integrally with the posture of the large pendulum 24 unless a rotational force beyond that is applied.

  As a result, the scraping member 19 that rotates integrally with the retaining ring member 27 similarly maintains the position on the spot, so that the scraping member 19 is applied to the ridge line portion of the outer surface of the filter medium 18 by its own weight. Stops on the spot with its own weight.

  Therefore, as the filter medium 18 rotates in the counterclockwise direction −N, as a result, sliding occurs between the inner surface of the scraping member 19 and the outer surface of the filter medium 18.

  Therefore, once in several VOC adsorption / desorption cycles, a cleaning operation in which the rotor 2 is reversed to remove the inorganic components is performed to remove the inorganic components adhered and solidified on the outer surface of the filter medium 18. The scraping of the scraping member 19 causes the cleaning action to scrape off and prevent the inorganic component from remaining on the outer surface of the filter medium 18, thereby increasing the lifetime of the VOC adsorption / desorption cycle without increasing the filter pressure loss. Can be realized.

  When the inner surface of the scraping member 19 and the outer surface of the filter medium 18 are always slid in the clockwise direction N of the rotor 2 that is a VOC adsorption / desorption cycle, the paint mist is removed from the filter medium 18. There is a possibility that the pressure loss increases due to the adsorption operation while being rubbed against the surface.

  Therefore, in the present embodiment, the presence or absence of sliding between the filter medium 18 and the scraping member 19 is selectively switched depending on the rotation direction (N, −N) of the rotor 2.

(Example)
In the above configuration, when the adsorption cartridges 5 are located at the solvent desorption station W, only the VOC component is generated by the gas of about 200 ° C. introduced from the first heater H1 via the solvent desorption station inlet duct D3. Is desorbed and decomposed by the catalyst.

  Thereafter, when the adsorption cartridges 5 are positioned at the particle processing station X, the flow is reversed by the high-temperature gas introduced from the catalyst portion C via the particle processing station inlet duct D5, and from the inside of the inner layer material 18b. The high temperature gas of about 500 ° C. flows to the outer surface of the outer layer material 18a, and the paint adhering to the outer surface of the outer layer material 18a is heated with the high temperature gas, whereby the organic component is vaporized and removed.

  However, when adsorbing / desorbing VOC, the organic components contained in the paint mist can be removed and reduced by vaporization by heating with a high-temperature gas of about 500 ° C. in the fine particle processing station X. Only some of the inorganic components contained cannot be vaporized with the high-temperature gas, and gradually accumulate while adhering to the surface of the filter medium 18.

  This is because organic resin coatings also contain moderate inorganic components to provide weather resistance, acid resistance, heat resistance, and abrasion resistance after printing and painting. Since the material itself has heat resistance rather than the components, the inorganic material in the paint mist that cannot be removed in the process of removing and reducing the paint mist and cannot be thermally decomposed adheres to the surface of the filter medium 18. Increase filter pressure loss.

  Therefore, in the present embodiment, the inner surface of the cylindrical scraping member 19 having an inner diameter that is substantially concentric and slightly larger than the outer diameter of the filter medium 18 is slid onto the outer surface of the two-layer filter medium 18. ing.

  Thereby, at the time of VOC adsorption, the adsorption operation is executed through the mesh (metal mesh) of the scraping member 19, and the inorganic substance that adheres to the surface and gradually accumulates on the filter medium 18 does not increase the filter pressure loss. Further, when the rotation direction of the rotor 2 rotates in the counterclockwise direction −N opposite to the clockwise direction N, which is a normal operation, the scraping member 19 scrapes off the adhering matter on the outer surface of the filter medium 18. it can.

  14A is a graph showing the relationship between the pressure loss of the filter medium 18 and the operating time when the scraping member 19 is not used, and FIG. 14B is a filter when the scraping member 19 is used. FIG. 5 is a graph showing the relationship between the pressure loss of the filter medium 18 and the operating time.

  As shown in FIG. 14 (A), the filter pressure loss value when the scraping member 19 is not used rises several times compared to the initial loss, and before reaching the operating time set as the filter replacement schedule. The pressure loss rise tolerance will be greatly exceeded.

  On the other hand, as shown in FIG. 14B, the filter pressure loss value when the scraping member 19 of the present invention is used reaches the pressure loss increase allowable value by the operating time set as the filter replacement schedule. As a result, the service life is extended and the actual replacement frequency can be reduced.

  Each operating time in FIG. 14 is obtained by integrating the time during which the adsorption / desorption cycle operation is actually performed, but the adsorption / desorption cycle operation is operated for 23 hours and cleaning is performed for one hour. This is an example in which the cleaning process is performed at a ratio, and the filter pressure loss when the cleaning time other than the adsorption / desorption cycle operating time is not included in the graph of FIG. 14 and the adsorption / desorption cycle operating time is the same. The change is shown.

(Other embodiments)
15 to 19 show another embodiment of the present invention.

  FIG. 15 is an exploded perspective view of an adsorption cartridge applied to a VOC gas processing apparatus according to another embodiment of the present invention, and FIG. 16 illustrates an adsorption cartridge applied to a VOC gas processing apparatus according to another embodiment of the present invention. FIG. 17 is a front view (intake side), FIG. 17 is a sectional view of the main part of an adsorption cartridge applied to a VOC gas processing apparatus according to another embodiment of the present invention, and FIG. 18 is a VOC gas according to another embodiment of the present invention. Sectional drawing of the principal part of the adsorption filter unit for peripheral arrangement | positioning applied to a processing apparatus, FIG. 19 is the principal part of the adsorption filter unit for center arrangement | positioning applied to the VOC gas processing apparatus which concerns on other embodiment of this invention. FIG.

  In the suction cartridges 5 shown in the above-described embodiment, the three suction filter units 14 are arranged inside and the pendulum unit F is provided in each suction filter unit 14. The suction cartridges 35 in the embodiment have seven suction filter units 14 disposed therein, and one pendulum unit F ′ is provided for the seven suction filter units 14. .

  Since the configuration of the adsorption filter units 14 is substantially the same as that of the above embodiment, the same reference numerals are given here and the description thereof is omitted (see FIGS. 18 and 19).

(Configuration of suction cartridge 35)
The suction cartridges 35 are respectively fixed to the peripheral portion 12 of the rotor 2 as in the above embodiment. Therefore, the portion located at the top dead center (ridgeline) of each of the suction cartridges 35 is displaced so that its rotational posture is shifted by 360 degrees during one rotation cycle of the rotor 2.

  15 to 17, a suction cartridge 35 is formed in a cylindrical shape in which an annular outer flange 40a (intake side) and an inner flange (exhaust side: not shown) are integrally formed at both ends, and a handle 41 is fixed. A body 40, lid bodies 42 and 43 that close both ends of the cylinder body 40, and a plurality (seven in this case) of adsorption filter units 14 that are housed in the cylinder body 40 and sandwiched between the lid bodies 42 and 43. And.

  The lid bodies 42 and 43 are fixed to the cylinder body 40 with screws (not shown), and a plurality of vent holes 42a and vent holes 43a are formed respectively. Further, the suction filter units 14 are fixed by bolts (not shown) on the lid 42 side. Further, in order to support one end side of the suction filter units 14..., Annular flanges 43 b... Projecting so as to surround the vent holes 43 a.

  As a result, in the adsorption cartridges 35..., During the VOC adsorption operation, the paint mist is introduced into the cylindrical body 40 from the vent holes 42 a of the lid 42, passes through the adsorption filter units 14, and the vent holes 43 a of the lid 43. More filtered air is discharged.

  On the other hand, each suction filter unit 14... Is rotated in conjunction with one pendulum unit F ′.

  The pendulum unit F ′ is supported by the shaft portion 20a so as to be positioned outside (intake side) of the wire mesh holding member 22 with respect to the six suction filter units 14 arranged around the inside of the cylindrical body 40. (See FIG. 18) and one suction filter unit 14 arranged at the center of the cylinder 40, the driven gears 44 are positioned outside (intake side) of the wire mesh holding member 22 and each driven gear 44 ... Is supported by the shaft portion 20a so as to be positioned inside a plurality of (for example, twelve) claw portions 45a formed inside the claw gears 45 ... (see FIG. 19). The small pendulum bearing member 46, the small pendulum retainer plate 48 that supports the small pendulum 47 in cooperation with the small pendulum bearing member 46, and a cylinder that is fixed to one end of the small pendulum retainer plate 48 and through which the shaft portion 20a passes. Shape collar (bearing) 49 and collar 49, a cover disk 50 supported by 49, a mounting frame 51 that supports the six suction filter units 14 arranged around the inner side of the cylinder 40, and a large pendulum 52 supported by the collar 49. Yes.

  The small pendulum bearing member 46 has a substantially oval shape made of a metal plate or the like. A through hole 46a into which an end of the collar 49 is fitted is formed at one end thereof, and the shaft of the small pendulum 47 is disposed near the other end. A recess 46b is formed which supports one end of the shape and defines the swing range of the small pendulum 47.

  The small pendulum 47 is supported at one end in the shape of a shaft between the small pendulum bearing member 46 and the small pendulum holding plate 48, and the other end (free end) can be engaged with the claw portions 45a. . At this time, the posture of the small pendulum 47 is in a ratchet relationship that engages with the claw portions 45a... Only in one rotation direction and rides on the claw portions 45a.

  The small pendulum retainer plate 48 has a substantially oval shape made of a thin metal plate or the like, and a collar 49 is fixed to one end side thereof, and a support hole 48a for supporting one end of the small pendulum 47 is formed near the other end. ing.

  The mounting frame 51 has a ring shape larger than the outer diameter of the claw gears 45. The mounting frame 51 protrudes radially and has a tip bent toward the lid 42 (intake side) to engage with the lid 42. A plurality of engaging claws 51a are formed. It should be noted that the bending of the engaging claws 51a... Toward the lid 42 (intake side) is at least equal to or greater than the thickness of the large pendulum 52.

  The large pendulum 52 is formed in a fan shape using a material having a high specific gravity, and is suspended by the shaft portion 20a of the suction filter unit 14... It is designed to maintain a suspended posture.

  Incidentally, as the number of the adsorption filter units 14 in the adsorption cartridges 35 increases, the amount of adsorption of the VOC increases and the efficiency is improved. However, the number of the adsorption filter units 14 installed in the adsorption cartridges 35 is accommodated in the adsorption cartridge 35. In addition, if the pendulum unit F is arranged in each of the adsorption filter units 14..., The cost of parts increases and the weight increases by the number of large pendulums 24.

  Therefore, in another embodiment of the present invention, for example, seven suction filter units 14... Are accommodated in one suction cartridge 35, and only the suction filter units 14. The pendulum 52 and the small pendulum 47 are arranged, and only the driven gear 44 is provided for the adsorption filter units 14 arranged around the cylinder 40, and the adsorption filter units 14 arranged in the center of the cylinder 40. Adopted a structure that is linked to.

  Accordingly, the posture of the scraping member 19 of the suction filter units 14 arranged at the center of the cylindrical body 40 and the posture of the scraping member 19 of the other suction filter units 14... And can always maintain the same phase.

  At this time, it is necessary to consider the size and weight of the large pendulum 52 so as to generate a moment larger than the sliding load between each scraping member 19 and the outer layer material 18a, but at least seven large pendulums 24 are required. In the relationship between the small pendulum 47 and the claw portions 45a, the same effects as in the above embodiment can be achieved, and the individual suction filter units 14 can be independent of each other. As compared with the case where the pendulum unit F is arranged, it is possible to clean a large number of the adsorption filter units 14... Without increasing the overall number of parts.

  The aperture ratio and thickness of the scraping member 19 may be selected as appropriate. If the inorganic component is not sufficiently scraped off by the weight of the scraping member 19 alone, a weight is placed on the outer periphery of the scraping member 19. By evenly arranging in the circumferential direction, the applied pressure acting on the top of the outer periphery of the filter medium 18 is increased, and it is possible to further ensure the scraping effect.

  In the cleaning operation of the filter medium 18 in the VOC gas processing apparatus 1 shown in the above embodiments, the heaters H1 and H2 communicated with the fans F1 and F2 and the solvent desorption station unit W and the particle processing station unit X. The heat exchanger HE and the like continue to operate in the same manner as during the adsorption / desorption operation, but are suspended in the printing / painting process.

  Accordingly, the inorganic component dust scraped off during the cleaning operation of the filter medium 18 is brought out of the adsorption cartridge 5 (or the adsorption cartridge 35) as a filter cartridge by the flow of air in the reverse direction in the fine particle processing station section X. A separate filter that collects and exhausts inorganic components is mounted in the discharge flow path, or a separate filter is interposed in the discharge flow path only during cleaning operation. A response is made.

It is block explanatory drawing which shows the system configuration | structure of the VOC gas processing apparatus which concerns on one Embodiment of this invention. It is a perspective view of the rotor applied to the VOC gas processing apparatus which concerns on one Embodiment of this invention. It is a disassembled perspective view of the rotor applied to the VOC gas processing apparatus which concerns on one Embodiment of this invention. It is a front view of the rotor applied to the VOC gas processing apparatus which concerns on one Embodiment of this invention. It is a disassembled perspective view of the adsorption cartridge applied to the VOC gas processing apparatus which concerns on one Embodiment of this invention. It is a front view (intake side) of an adsorption cartridge applied to a VOC gas processing device concerning one embodiment of the present invention. It is a rear view (exhaust side) of the adsorption cartridge applied to the VOC gas processing apparatus concerning one embodiment of the present invention. It is sectional drawing of the adsorption cartridge applied to the VOC gas processing apparatus which concerns on one Embodiment of this invention. It is a disassembled perspective view of the adsorption | suction filter unit applied to the VOC gas processing apparatus which concerns on one Embodiment of this invention. It is a front view (intake side) of an adsorption filter unit applied to a VOC gas processing device concerning one embodiment of the present invention. It is sectional drawing of the adsorption | suction filter unit applied to the VOC gas processing apparatus which concerns on one Embodiment of this invention. It is operation | movement explanatory drawing of the principal part at the time of forward rotation of the adsorption filter unit applied to the VOC gas processing apparatus which concerns on one Embodiment of this invention. It is operation | movement explanatory drawing of the principal part at the time of reverse rotation of the adsorption filter unit applied to the VOC gas processing apparatus which concerns on one Embodiment of this invention. It is a graph of the relationship between the pressure loss and operating time in the VOC gas processing apparatus which concerns on one Embodiment of this invention, (A) is the relationship between the pressure loss of a filter medium and operating time when a scraping member is not used. It is the graph shown by. (B) is a graph showing the relationship between the pressure loss of the filter medium and the operating time when the scraping member is used. It is a disassembled perspective view of the adsorption cartridge applied to the VOC gas processing apparatus which concerns on other embodiment of this invention. It is a front view (intake side) of the adsorption cartridge applied to the VOC gas processing apparatus concerning other embodiments of the present invention. It is sectional drawing of the principal part of the adsorption cartridge applied to the VOC gas processing apparatus which concerns on other embodiment of this invention. It is sectional drawing of the principal part of the adsorption filter unit for peripheral arrangement | positioning applied to the VOC gas processing apparatus which concerns on other embodiment of this invention. It is sectional drawing of the principal part of the adsorption filter unit for center arrangement | positioning applied to the VOC gas processing apparatus which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... VOC gas processing apparatus 2 ... Rotor 5 ... Adsorption cartridge 9 ... Motor (drive device)
DESCRIPTION OF SYMBOLS 14 ... Adsorption filter unit 18 ... Filter material 19 ... Scraping member (sliding contact member)
21. Clip (supporting member)
22 ... Wire mesh holding member (supporting member)
F ... Pendulum unit (pendulum member)

Claims (4)

A cylindrical suction cartridge containing the suction filter unit; a rotor in which a plurality of suction cartridges are arranged adjacent to each other in the circumferential direction; and a drive device that rotates the rotor. In the VOC gas processing apparatus for processing the VOC gas by supplying the VOC gas contained in the raw material chemical substance to the adsorption cartridge, the adsorption filter unit includes:
A cylindrical filter medium;
A cylindrical sliding contact member having an inner diameter larger than the outer diameter of the filter medium so as to surround the filter medium;
A support member that displaceably supports the sliding contact member such that the outer peripheral surface of the filter medium and the inner peripheral surface of the sliding contact member are brought into contact with each other by its own weight;
The filter medium and the sliding contact member are allowed to rotate in the one direction in conjunction with a change in the rotation posture of the adsorption cartridge with respect to the rotation of the rotor in one direction, and the adsorption with respect to the rotation of the rotor in the other direction. The rotation of the filter medium in the other direction is allowed in conjunction with the change in the rotation posture of the cartridge, and the rotation of the sliding contact member in the other direction is prevented so that the outer peripheral surface of the filter medium and the sliding contact member A pendulum member that generates sliding between the inner peripheral surface,
A VOC gas processing apparatus comprising:   The VOC gas processing apparatus according to claim 1, wherein a plurality of adsorption filter units are accommodated in the adsorption cartridge, and the pendulum member is provided in each of the plurality of adsorption filter units.   A plurality of adsorption filter units are accommodated in the adsorption cartridge, and the plurality of adsorption filter units are arranged in the center, and a plurality of other adsorption filters connected to the central adsorption filter unit by gears. 2. The VOC gas treatment according to claim 1, wherein the unit is configured to be interlocked so as to maintain the same phase, and one pendulum member is provided in the central adsorption filter unit. apparatus. A VOC for processing VOC gas by supplying VOC gas contained in a raw material chemical substance to the plurality of adsorption cartridges while intermittently rotating a rotor in which a plurality of cylindrical adsorption cartridges containing adsorption filter units are arranged adjacently in the circumferential direction. A filter cleaning method for a gas processing device, comprising:
From the outer diameter of the filter medium so as to allow the rotation of the cylindrical filter medium constituting the adsorption filter unit in conjunction with the change in the rotation posture of the adsorption cartridge accompanying the rotation of the rotor and to surround the filter medium. Further, by preventing the rotation of the cylindrical sliding contact member having a large inner diameter, sliding is caused by the weight of the sliding contact member between the outer peripheral surface of the filter medium and the inner peripheral surface of the sliding contact member. A filter cleaning method comprising: generating and cleaning an outer peripheral surface of the filter medium.

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