JP2004223518A - Sealing device and sealing method for rotor type gas adsorption apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device and a sealing method for always securing excellent sealing properties by the device following the deflection of a rotor when rotated. <P>SOLUTION: A sealing material 5 made of an incombustible material is disposed on parting frames 3, 3a fixed on a casing 2 of a rotor type gas adsorption apparatus, the parting frames dividing the end face M of the rotatable rotor 1 at least into an adsorption zone S and a regenerating zone U, such that the sealing material 5 is elastically biased toward the rotor end face by means of a spring 11 comprising a coil spring. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  According to the present invention, a gas containing an organic solvent is passed between end faces of a rotatable rotor composed of an adsorption element to adsorb the organic solvent to the adsorption element, and the organic solvent attached to the adsorption element is blown out from the opposite direction by hot air to remove the organic solvent. The present invention relates to a sealing device and a sealing method for sealing between an end face of the rotor of a rotary adsorber and a partition frame of a casing for purifying by removing and blowing off the adsorbing element to return to a reusable state. Things.

  In a conventional organic solvent adsorber, the rotor is rotatably held by a motor in a box-shaped casing provided with a partition frame for dividing the surface of the rotor into an adsorption zone, a regeneration zone, and a cooling zone. On the other hand, the rotor is composed of a plurality of sector-shaped suction elements defined by a metal cylindrical rim, and the suction elements have a honeycomb in which a large number of fine holes penetrate from one end face to the other end face. The plurality of sector sectors are inserted into sector-shaped cavities, which are structured and defined by radially extending metal spokes.

  In actual use, when a gas containing an organic solvent flows through one end face of the rotor positioned in the adsorption zone toward the other end face, the adsorbent carried by the rotor adsorbs the organic solvent in the gas. The purified gas is discharged from the other end face, and then the rotor is rotated by a predetermined angle to move from the adsorption zone to the regeneration zone, and the temperature is higher than the boiling point of the adsorbed organic solvent from 180 ° C to 200 ° C. The step of removing the adsorbed organic solvent by passing regenerated air heated to a high temperature from the other end to the one end and removing the adsorbed organic solvent by blowing off the adsorbed element to regenerate the adsorption element is performed.

  Further, the partition frame that defines the end face of the rotor in the adsorption zone and the regeneration zone includes at least three partition plates extending in the radial direction and an annular plate or an arc-shaped plate facing the outer peripheral portion of the end face of the rotor, and The annular or arcuate plate is joined to the outer end portion of the partition plate to define a sector of each sector.

  These partition plates are further provided with seal pieces or elastic seal blocks slidable toward the rotor end face to prevent interference between the gases in the respective zones. Such a seal has a first problem in that the flatness of the rotor end surface is not good, and a second problem is that the rotor end surface during rotation forms a vertical plane that is exactly perpendicular to the rotation axis. Otherwise, there is a disadvantage that complete sealing cannot be obtained.

  In particular, in the rotary gas adsorber of the type described above, when the rotor rotates, there occurs a problem that the rotor is shaken and the end face of the rotor does not form a vertical plane exactly perpendicular to the rotation axis. Furthermore, these seal pieces or elastic seal blocks are required to have heat resistance, wear resistance, and chemical stability. However, in order to overcome such problems, the present invention obtains a sealing device that always keeps good sealing performance by following irregularities on the rotor end face regardless of the flatness and verticality of the rotor end face. The purpose is to:

  According to the present invention, there is provided a seal device attached to a rotary gas adsorber having a rotor end face defined at least in an adsorption zone and a regeneration zone, wherein a seal material made of a noncombustible material is used. The problem is solved by being arranged so as to be elastically biased slidably toward the rotor end face.

  In such a configuration, since the sealing material is made of a non-combustible material, the sealing material is not deformed even when it comes into contact with the rotor exposed to high-temperature hot air. , So that the contact with the rotor end surface is continuously maintained following these changes, and thus the sealing of each zone is always ensured.

  In a preferred embodiment of the present invention, the seal member is elastically biased slidably toward the rotor end face by an elastic force acting on the seal member. Preferably, the elastic force is generated by a coil spring. In such a configuration, since the elastic force is always applied to the seal material, even if the rotor is shaken during rotation, the contact with the end face of the rotor is continuously maintained by following these changes. Nature is always ensured.

  In another preferred embodiment of the present invention, the sealing material is expanded graphite. Since this material has high heat resistance, when a gas containing an organic solvent is treated, a gas flow having a higher temperature than the boiling point of 180 ° C. to 200 ° C. is blown to the rotor. It is preferable to use a sealing material made of a material having excellent heat resistance and being chemically stable.

  In another preferred embodiment of the present invention, the sealing material is graphite. Since this material also has high heat resistance and excellent wear resistance and chemical stability, it is extremely preferable to use the sealing material in the above-described environment.

  As one preferred embodiment according to the present invention, an elastic thin plate is inserted into one or both of the seal member and the partition frame and the mounting plate that sandwich the seal member. By elastically sandwiching the sealing material in this way, it is said that when the sealing material receives an impact while sliding on the rotor end face, the sealing material absorbs the impact received from the partition frame and the mounting plate. Produces an effect.

  As a preferred embodiment of the present invention, the elastic thin plate piece is expanded graphite. As a characteristic of this material, of course, it is excellent in heat resistance as described above, but on the other hand, it is inferior in mechanical strength, and in order to compensate for this, the sealing material has elasticity in addition to heat resistance. Expanded graphite is preferred. Also, inserting such an elastic thin sheet of expanded graphite between the sealing material and the partition frame and the mounting plate requires the following movement of the sealing material with respect to the rotor end face because the expanded graphite itself has excellent friction resistance. To make it more smooth.

  According to the present invention, there is provided a rotary gas adsorber in which at least an adsorption zone and a regeneration zone are provided on an end face of a rotatable rotor, a sealing material is disposed between the zones, and a gas is generated between the zones. A sealing method for preventing interference, which is solved by using a cushioning force and a restoring force to elastically slidably bias the sealing material toward a rotor end face.

  According to this method, even when the rotor is shaken during rotation, the seal member is elastically biased to be slidable toward the rotor end face, and the contact with the rotor end face is continuously maintained following these changes. Therefore, the hermeticity of each zone is always ensured.

  In a preferred embodiment of the present invention, in the above-mentioned sealing method in the rotary gas adsorber, the temperature of the gas flowing through the regeneration zone is 180 ° C or higher. The gas circulated in the regeneration zone is regeneration air heated to a temperature higher than 180 ° C., which is a temperature equal to or higher than the boiling point of the organic solvent adsorbed in the adsorption zone. The organic element adsorbed in the adsorption zone can be removed by blowing off the organic solvent adsorbed in the adsorption zone while preventing mutual interference with the flowing gas, and the adsorption element can be regenerated.

The sealing device in the rotary gas adsorber according to the present invention has a configuration in which the sealing material is elastically biased toward the rotor end face, so that the sealing property between the operation zones is independent of the flatness and verticality of the rotor end face. Is greatly improved, and despite the simple structure, the effect of preventing a decrease in waste gas treatment efficiency can be prevented and the life of the rotor can be extended.
Further, the sealing method in the rotary gas adsorber according to the present invention has a simple structure because the sealing material is elastically biased slidably toward the rotor end face by using a buffering force and a restoring force. Nevertheless, it is possible to obtain the effect of preventing a decrease in waste gas treatment efficiency and extending the life of the rotor.

  Hereinafter, several embodiments and a sealing method related to a sealing device in a rotary gas adsorber according to the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a rotor in a normal use state in which a sealing device in a rotary gas adsorber according to the present invention is put in a case. FIG. 2 is a perspective view showing a sector with a spoke portion and a rim portion and an adsorption element. FIG. 3 is a perspective view of a rotor suitable for use with the sealing device according to the present invention having an end face covered with a plate made of a noncombustible material and subjected to heat shielding at the bonding portion of FIG. FIG. 4 is a partial cross-sectional view of the sealing device according to the present invention viewed from a cross-section, showing a state where the sealing device according to the present invention is disposed along the radial direction of the rotor end face; FIG. 4 is a partial cross-sectional view of the sealing device according to the present invention, similar to FIG.

  In FIG. 1, a case 2 is capable of housing a rotor 1 rotatably. Here, for convenience of explanation, only a suction end S and a regeneration zone U of a rotor end face M will be described. Note that, in a general use state, an angle range indicated by a symbol “T” is a cooling zone. The adsorption zone S and the regeneration zone U are separated from each other by a case 2 that partitions the respective zones and a partition plate 3 having an integrated structure. Prevents gas leakage between zones.

  In FIGS. 3 and 4, a linear partition plate 3 and an arc-shaped 3b for partitioning an adsorption zone and a regeneration zone, a cooling zone and a regeneration zone, and a rotor outer peripheral portion and an outer peripheral regeneration zone are provided with a sealing material 5 for mounting. The plate 7 is fixed with a nut 10 (FIG. 3) or a screw 13 (FIG. 4). The sealing material 5 that slides on the rotor 1 is fixed to the connecting portion 8 bent at a right angle from the mounting plate 7 and fixed to the partition plate 3 by the nut 10 or the screw 13 via the rod member 9 with the nut 10. In addition, a spring 11 composed of a coil spring surrounding the rod member 9 is interposed between the connecting portion 8 and the seal member 5, and with such a configuration, a spring force and a restoring force of the spring are used. Thus, the seal member 5 is elastically biased toward the end face of the rotor and is slidable.

  The sealing material 5 used here is required to have heat resistance, abrasion resistance, and chemical stability. As a material suitable for such a sealing material, expanded graphite and graphite are preferable. As the material of the spring, stainless steel in general, or “Inconel” (trade name) is preferable.

  The conventional sealing device has a structure in which a sealing material made of a band-shaped elastic body is directly attached to a partition plate of a case, and a problem occurs in a rotor in which a heat-resistant heat-insulating seal is provided on the edges of spokes and a rim. That is, a rotor of the type described above will be described below with reference to FIG.

  In FIG. 2, the rotor 1 includes spokes 103 (see FIG. 3) extending radially from a hub 105, a rim 107 surrounding the spoke portion in an annular shape, and a sector sector 102 including a suction element 104. Each of the bonding portions 108 (see FIGS. 3 and 4) between the spokes and the rim and the sector is covered with heat shield plates 110 and 111 made of a noncombustible material to have heat shielded end faces. Referring to FIGS. 3 and 4, the plates 110 and 111 are flush with or slightly back from the end surface M of the rotor 1.

  Although the sealing function is exerted by sliding the sealing material on the rotor end face M, the sealing material 5 according to the present invention is supposed to slide on the end face M provided with a noncombustible material as shown in FIG. Therefore, in the sealing device of the present invention, the elastic member and the restoring force of the spring 11 are used to enable the sealing member 5 to follow the unevenness of the rotor end face, thereby enabling smooth and reliable sliding. The good sealing property of each operation zone is always ensured.

  The structure of the sealing device shown in FIG. 4 is essentially unchanged from that shown in FIG. However, the method of mounting the sealing device is such that the sealing device can slide on an annular heat shield plate 111 made of a non-combustible material having good slidability provided on the outer peripheral portion of the rotor 1, for example, expanded graphite. Minor changes have been made.

  Therefore, the folded edge 3b of the outer peripheral edge 3a defining the operation area, which is a circular punched portion of the surface plate of the case 2, substantially becomes the partition frame 3b, and the sealing material 5 extends parallel to the partition frame 3b. The rod member 9 guided between the plate 7 and screwed to the connecting portion 8 is movably attached to the rod member 9 under the elastic force of a spring 11 which is a coil spring surrounding the rod member 9. Therefore, the sealing device shown in FIG. 4 is disposed only over the arc portion of the angular range of the reproduction zone U of the case 2 in FIG. The reason for disposing the sealing material 4 according to the present invention only in the arc portion of the regeneration zone U is that this region is heated at a temperature higher than 180 ° C. to blow off the organic solvent attached to the adsorption element. This is because they are exposed to air (regenerated air).

  In the sealing device shown in FIGS. 3 and 4, the sealing material 5 has a cylinder hole 14 formed therein, and a locking member formed at the tip end of the rod member 9 in the cylinder hole. The part is fitted. In addition, the locking portion has a piston shape which is slidably fitted in the cylinder hole 14. Further, the elastic member 15 is inserted into one or both of the partition member 3 and the mounting plate 7 that sandwich the sealing member 5. By elastically sandwiching the sealing material 5 in this manner, the sealing material 5 is not damaged between the partition frame 3 and the mounting plate 7 so that the sealing material 5 is not damaged by the impact when passing through the uneven portion while sliding on the rotor end face. Exerts a buffering action.

  Further, as described above, the elastic thin plate 15 is made of expanded graphite according to one embodiment of the present invention. This material is extremely preferable in terms of increasing heat resistance and abrasion resistance as well as elasticity.

FIG. 4 is a perspective view showing a normal use state in which the sealing device in the rotary gas adsorber according to the present invention is put in a case. 1 is a perspective view of a rotor to which a sealing device according to the present invention is applied. FIG. 2 is a partial sectional view of the sealing device according to the present invention as viewed from the AA section in FIG. 1. FIG. 4 is a partial sectional view of the sealing device according to the present invention, similar to FIG.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Rotor 2 Casing 3, 3b Partition frame 5 Sealing material 7 Mounting plate 8 Connecting part 9 Rod member 11 Spring (coil spring)
12 Locking part 14 Cylinder hole 15 Elastic thin plate piece M Rotor end face S Suction zone U Regeneration zone

Claims (9)

  A seal device attached to a rotary gas adsorber having a rotor end face defined at least in an adsorption zone and a regeneration zone, wherein a seal material made of a non-combustible material is elastically slidable toward the rotor end face. A sealing device in a rotary gas adsorber, wherein   2. The seal device according to claim 1, wherein the seal member made of a noncombustible material is elastically biased slidably toward an end face of the rotor by applying an elastic force.   The sealing device according to claim 2, wherein the elastic force is generated by a coil spring.   The sealing device according to claim 1, wherein the sealing material is expanded graphite.   The sealing device according to claim 1, wherein the sealing material is graphite.   The elastic thin plate piece is inserted into any one or both of the sealing material and the partition frame and the mounting plate for holding the sealing material, according to any one of claims 1 to 3, wherein A sealing device in the rotary gas adsorber according to the above.   The sealing device according to claim 6, wherein the elastic thin plate piece is expanded graphite.   A sealing method for preventing interference between gases by disposing a sealing material between said zones in a rotary gas adsorber provided with at least an adsorption zone and a regeneration zone on an end surface of a rotatable rotor, comprising: A sealing method in a rotary gas adsorber, characterized in that the sealing material is elastically slidably biased toward a rotor end face using a force and a restoring force.   9. The sealing method for a rotary gas adsorber according to claim 8, wherein the temperature of the gas flowing through the regeneration zone is 180 [deg.] C. or more.

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