JPH0538413A - Apparatus for gas recovery - Google Patents

Abstract

PURPOSE:To scale down the driving system of an apparatus for gas recovery to reduce its manufacturing and running costs by installing a stationary type adsorption- desorption vessel including two or more compartments filled with an adsorbent. CONSTITUTION:A stationary type adsorption-desorption vessel 41 includes two or more compartments 12 which are arranged along its central axis and are filled with an adsorbent 13. A peripheral channel for a raw material gas 55 and a peripheral channel 58 for a specified gas 58 on a movable sealing plate 52 are placed concentric ; an opening for the raw material gas 56 and an opening for the specified gas 59 are arranged to overlap with the corresponding peripheral channel 58 of the same radius. By the rotation of a rotary valve plate 53, the raw material gas supplied from the side of the peripheral channel for the raw material gas 55 is supplied to the compartments 12 in the stationary type adsorption-desorption vessel 41 one after another, and by the suction from the side of the pheripheral channel for the specified gas 58, the specified gas is sucked from each of the compartments 12 one after another. This relation also holds between a rotary valve plate 63 and a movable sealing plate 62, so that an unadsorbed product gas is discharged through an opening for the product gas 66, a peripheral channel for the product gas 65, and an exhaust port for the product gas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas recovery device.

[0002]

2. Description of the Related Art FIG. 6 is a vertical cross-sectional view of a rotary gas recovery apparatus filed by the applicant of the present application in 1993 by Japanese Patent Application No. 179553, and FIG. 7 is a cross-sectional view taken along the line EE of FIG. 6 is a sectional view taken along line FF of FIG. 6, and FIG. 9 is a sectional view taken along line GG of FIG.

In the figure, 14 is a gas compressor for supplying a raw material gas, 15 is a vacuum pump for sucking and discharging a specific gas, and 21 is a vacuum pump.
Is an upper fixed manifold that is connected to the compressor 14 and the vacuum pump 15, and a source gas manifold and a specific gas manifold are formed in the respective connected parts. Reference numeral 22 is provided below the manifold to prevent rotation. And a movable seal plate which is movable only in the vertical direction, 8 is a raw material gas inlet provided in the movable seal plate, 8X is a groove extending to the same inlet, and 9 is a specific gas provided in the movable seal plate. A discharge port, 9X is a groove extending to the discharge port, and 23 is a communication between the raw material gas manifold of the upper fixed manifold 21 and the raw material gas inlet port 8 or the specific gas manifold of the upper fixed manifold 21 and the specific gas discharge port 9 are connected. Bellows, 24 is a spring provided between the upper fixed manifold 21 and the movable seal plate 22, and 25 is a block for rotating the movable seal plate 22. A detent pin that.

Reference numeral 26 is a lower fixed manifold in which a product gas manifold and a purge gas manifold are respectively formed, 27 is a movable seal plate which is provided above the manifold and is prevented from rotating and is movable only in the vertical direction, and 10 is the movable seal. Product gas outlet provided on the plate, 10
X is a groove connected to the same outlet, 11 is a minute hole for purging gas inflow provided in the movable seal plate, 11X is a groove connected to the minute hole, 28 is a product gas manifold of the lower fixed manifold 26 and a product gas The outlet 10 or the bellows which connects the purge gas manifold of the lower fixed manifold 26 and the purge gas inflow minute hole 11 to each other, 29 is a spring provided between the lower fixed manifold 26 and the movable seal plate 27, and 30 is movable. It is a detent pin that blocks the rotation of the seal plate 27.

Reference numeral 3 is a bearing provided in the upper fixed manifold, 32 is a fixed portion below the apparatus, and 4 is a fixed portion 32.
Bearings, 31 is a thrust bearing provided in the fixed portion, 5 is a rotating shaft supported and rotated by the bearings 3 and 4, 6 is a key provided in the rotating shaft,
7 is fixed to the rotary shaft 5 by the same key, and between the upper movable seal plate 22 and the lower movable seal plate 27, a lower portion thereof is supported by a thrust bearing 31 to rotate together with the rotary shaft 5. Adsorption / desorption device, 33 is the rotary shaft 5
Is a motor for driving.

The adsorption / desorption device 7 is provided with a plurality of compartments 12 (8 compartments in this example) as shown in FIG. 8 (F-F sectional view of FIG. 6), in which the adsorbent 13 is placed. Is filled. As shown in FIGS. 7 and 9, the upper and lower movable seal plates 22 and 27, which are pressed against the end faces of the adsorption / desorption device 7 by springs, respectively, are provided with a plurality of symmetrically symmetrical positions with respect to the rotation axis. Grooves 8X, 9X, or 10X, 11X for covering the compartments (three compartments in this example) are provided.

In the above apparatus, the raw material gas is passed by the gas compressor 14 through the raw material gas inlet 8 and the groove 8X into the compartment 12 connected to the raw material gas inlet 8 of the rotary adsorption / desorption device 7 and filled therein. The specific gas is adsorbed by the adsorbent 13 that has been adsorbed, and the gas that has not been adsorbed, that is, the product gas, is exhausted through the product gas exhaust groove 10X and the exhaust port 10. On the other hand, due to the rotation of the adsorption / desorption device 7, the compartment having the adsorbent that has adsorbed the specific gas becomes the specific gas discharge groove 9X.
And when connected to the discharge port 9, the specific gas is vacuum pump 1
By the depressurizing action of 5, it is separated from the adsorbent 13 and discharged and collected. In this state, the purge gas is injected through the purge gas inflow minute hole 11 and the groove 11X in order to facilitate the separation of the specific gas. As described above, the product gas is continuously produced by the rotation of the adsorption / desorption device 7 by the above-mentioned device, and the specific gas is recovered.

Since the performance of this device is governed by the amount of gas leakage from the rotationally sliding sealing surfaces 34 and 35 (FIG. 6), it is necessary to reduce this. Therefore, the upper and lower movable seal plates, 22 and 27 are connected to the spring 24, respectively.
And 29, the structure is such that it is pressed against the end face of the rotary adsorption / desorption device 7 to compensate the wear of the seal surface and reduce the gap of the seal surface.

[0009]

In order to process an extremely large amount of gas, for example, 500 to 1,000,000 m ³ / h, it is necessary to increase the size of the apparatus, but of course, the adsorption / desorption device is also large and large. Weight up. However, in the conventional gas recovery device, since the adsorption / desorption device is a rotary type, the drive system including the motor, the speed reducer, the drive shaft, etc. for driving the device is enlarged, which not only increases the manufacturing cost but also increases the operation. In this case, the power consumption becomes large and the running cost increases.

An object of the present invention is to provide a gas recovery device having a low running cost, in which a heavy-weight adsorption / desorption device is fixed and a lightweight rotary valve plate is provided to downsize a drive system.

[0011]

[MEANS FOR SOLVING THE PROBLEMS] A fixed adsorption / desorption device having a plurality of compartments along its central axis and filled with an adsorbent therein, a raw material gas opening and a specific gas opening. A first rotary valve plate, one surface of which is in contact with one end surface of the adsorption / desorption device and which is movable in the axial direction and rotates about the same axis; a raw material gas circumferential groove and a specific gas circumferential groove. Its surface is in contact with the other surface of the rotary valve plate and is movable in the axial direction, but has a first seal plate that does not rotate about the same axis, a product gas opening and a purge gas groove, and that surface is the suction plate. A second rotary valve plate which is in contact with the other end face of the desorber and which is movable in the axial direction and rotates coaxially at the same speed as the first rotary valve plate, and an entire circumferential groove for product gas and an entire circumferential surface for purge gas. A groove which is in contact with the other surface of the second rotary valve plate and is movable in the axial direction but coaxial. A second sealing plate that does not rotate further, and a loading mechanism that presses both the sealing plate and the rotary valve plate against the end faces on the respective sides of the adsorption / desorption device. The present invention relates to a gas recovery device.

[0012]

In the first seal plate, the raw material gas circumferential groove and the specific gas circumferential groove are concentrically provided. The raw material gas opening and the specific gas opening of the first rotary valve plate are provided so as to overlap with the corresponding entire circumferential groove with the same radius.
Therefore, as the rotary valve plate rotates, the raw material gas supplied from the raw material gas circumferential groove side is sequentially supplied to the plurality of compartments of the fixed adsorption / desorption device and sucked from the specific gas circumferential groove side. Then, the specific gas is sequentially sucked from each compartment. The above relationship holds true for the second rotary valve plate and the second seal plate.

[0013]

1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a sectional view taken along the line BB of FIG.
5 is a sectional view taken along line CC of FIG. 1, and FIG. 5 is a sectional view taken along line DD of FIG. In FIG. 1, 41 is a fixed type adsorption / desorption device which is installed with its central axis vertical and has a tubular appearance, and 42 is a fixing leg for attaching the adsorption / desorption device to the fixing portion. Unlike the conventional adsorption / desorption device of the rotary type, the adsorption / desorption device of this embodiment is of the fixed type.

The internal structure of the adsorption / desorption device 41 is the same as the conventional one as shown in FIG. 4 (C-C sectional view of FIG. 1).
A plurality of compartments 12 are provided, and an adsorbent is filled therein. At the center of the adsorption / desorption device 41, a rotary shaft 5 is provided via bearings 3 and 4. 33 is a motor for driving the same rotary shaft.

Reference numeral 51 is an upper fixed manifold, and 52 is a seal plate which is provided below the manifold, is prevented from rotating by the rotation stop pin 25, and is movable only in the vertical direction. Reference numeral 53 is a rotary valve plate which is sandwiched between the seal plate and the fixed adsorption / desorption device 41 and which is movable in the vertical direction and is also rotatable. The rotary valve plate is attached to the rotary shaft 5 via a key 6 so as to be slidable in the axial direction. A raw material gas manifold and a specific gas manifold are formed in the upper fixed manifold 51. Reference numeral 23 denotes a bellows that connects the manifolds of the upper fixed manifold 51 and the movable seal plate 52 that is movable in the vertical direction,
Reference numeral 24 is a spring that is provided between the upper fixed manifold 51 and the movable seal plate 52 and applies a load to prevent gas leakage on the rotary sliding surface.

Reference numeral 61 is a lower fixed manifold, and 62 is a seal plate which is provided above the lower fixed manifold, is prevented from rotating by the rotation stop pin 30, and is movable only in the vertical direction. Reference numeral 63 is a rotary valve plate which is sandwiched between the seal plate and the fixed adsorption / desorption device 41, is movable in the vertical direction, and is rotatable. The rotary valve plate 63 is slidably attached to the rotary shaft 5 via the key 6. The lower fixed manifold 61 is provided with a product gas manifold and a specific gas manifold, respectively. Reference numeral 28 is a bellows that connects the lower fixed manifold and the movable seal plate 62, and 29 is provided between the lower fixed manifold 61 and the movable seal plate 62, and a load is applied to prevent gas leakage on the rotary sliding surface. It is a spring.

FIG. 2 is a cross-sectional view (cross section AA of FIG. 1) of the upper movable seal plate 52. In the figure, reference numeral 54 is a raw material gas inlet, 55 is a raw material gas circumferential groove, 57 is a specific gas outlet, and 58 is a specific gas circumferential groove. The raw material gas circumferential groove 55 communicates with the raw material gas manifold of the upper fixed manifold 51 via the raw material gas inlet 54 and the bellows 23, and further, as in the case of the conventional technique, a raw material supply gas compressor. Is in communication with. Full circumference groove 58 for specific gas
Communicates with the specific gas manifold of the upper fixed manifold 51 via the specific gas discharge port 57 and the bellows 23, and further communicates with the vacuum pump for sucking and discharging the specific gas as in the case of the conventional technique.

FIG. 3 is a cross-sectional view (cross-section B-B in FIG. 1) of the upper rotary valve plate 53. In the figure, reference numeral 56 is a raw material gas opening, and 59 is a specific gas opening. Movable seal plate 52
The raw material gas circumferential groove 55 and the raw material gas opening 56 of the rotary valve plate 53 are made to have a radius of R ₁ and a width of W _1, and are overlapped with each other. The radii R of the specific gas circumferential groove 58 of the movable seal plate 52 and the specific gas opening 59 of the rotary valve plate 53 are also R.
₂ , their width W ₂ is made equal and they overlap. Source gas opening 56 and specific gas opening 59
The angle of expansion of both is α. Also, the angle of tension of the closed part between the two openings is both β. As shown in the figure, since the sum of α and β is made to be 180 degrees, it can be said that the source gas opening 56 and the specific gas opening 59 are located at a phase shift of 180 degrees. .. The angle α of the opening is
As shown in FIG. 4, the angle α covers the plurality of compartments 12 of the fixed adsorption / desorption device 41. Further, the angle of extension β of the closed portion is an angle β that covers at least one compartment 12.

In the movable seal plate 62 provided in the lower part of FIG. 1, 64 is a product gas discharge port, 65 is a product gas full circumferential groove, 67 is a purge gas inlet, and 68 is a purge gas full circumferential groove. Although the cross-section of the movable seal plate 62 is omitted, its shape is similar to that of FIG. 2, and in FIG. 2, the raw material gas inlet 54, the raw material gas entire circumferential groove 55, the product gas discharge port 64, and the product The gas circumferential groove 65, the specific gas discharge port 57, and the specific gas circumferential groove 58 are replaced with the purge gas inlet 67 and the purge gas circumferential groove 68, respectively. The product gas circumferential groove 65 communicates with the product gas manifold of the lower fixed manifold 61 via the product gas outlet 64 and the bellows 28, and the purge gas circumferential groove 68 includes the purge gas inlet 67 and the bellows 2.
8 to communicate with the purge gas manifold of the lower fixed manifold 65.

FIG. 5 is a cross-sectional view (cross section D-D in FIG. 1) of the lower rotary valve plate 63. In the figure, 66 is a product gas opening, 69 is a purge gas inflow minute hole, and 70 is a purge gas groove. This cross section has a shape, size, and angle corresponding to the cross section of the upper rotary valve plate 53 shown in FIG. 3, but the portion related to the purge gas is composed of the purge gas inflow minute holes 69 and the purge gas groove 70. This is different from the rotary valve plate 53 on the upper side.

In the above apparatus, the raw material gas is fed by the gas compressor to the raw material gas inlet 54, the raw material gas circumferential groove 55,
Further, the specific gas is adsorbed by the adsorbent 13 filled in the compartment 12 of the fixed adsorption / desorption device 41 through the raw material gas opening 56, and the gas not adsorbed, that is, the product gas is the product gas. The gas is discharged through the opening 66, the product gas circumferential groove 65, and the product gas discharge port 64. In this device, the adsorption / desorption device 41 is fixed.
When the rotary shaft 5 is driven by the motor 33, the upper and lower rotary valve plates 53 and 63 connected to the rotary shaft by the key 6 rotate at the same speed. When the rotary valve plate rotates 180 degrees,
The specific gas opening 59 and the purge gas groove 70 are provided above and below the compartment adsorbing the specific gas. At this time, the specific gas is separated from the adsorbent by the depressurizing action of the vacuum pump, and the specific gas opening 59, the specific gas entire circumferential groove 58,
And it is discharged and recovered through the specific gas discharge port 57. In this state, in order to facilitate the separation of the specific gas, the purge gas is injected through the purge gas inlet 67, the purge gas entire circumferential groove 68, the purge gas inflow minute hole 69, and the purge gas groove 70. The above process is sequentially performed in each compartment of the fixed adsorption / desorption device by the rotation of the rotary valve plate, so that the product gas is continuously produced and the specific gas is recovered. In the above-mentioned device, the movable seal plate 52, the rotary valve plate 53, the fixed adsorption / desorption device 41, the rotary valve plate 63, and the movable seal plate 62 each have a sealing surface that slides in rotation, but the spring 24, Since 29 presses the movable seal plates 52, 62 and the rotary valve plates 53, 63 from the fixed manifold side to the suction / desorption device 41, gas leakage is prevented.

As described above in detail, in the present embodiment, the adsorbing / desorbing device in the case of large capacity and large size is fixed without rotating, and a new lightweight rotary valve plate is provided to enable continuous processing. The advantages are that the drive system is made compact, the running cost (especially the power consumption) at the time of gas recovery is reduced, and the thrust bearing that conventionally supports the adsorption / desorption device becomes unnecessary.

[0023]

The gas recovery apparatus of the present invention has a fixed adsorption / desorption device having a plurality of compartments along its central axis and having an adsorbent filled therein, a raw material gas opening and a specific gas. A first rotary valve plate having an opening for rotation and rotating, a first seal plate having a full circumferential groove for raw material gas and a full circumferential groove for specific gas, which does not rotate, a product gas opening and a purge gas groove. Having said first
A second rotary valve plate that rotates at the same speed as the rotary valve plate, and a second seal plate that has a full circumferential groove for product gas and a full circumferential groove for purge gas and that does not rotate. Since it is equipped with a loading mechanism that presses the rotary valve plates together with the end faces of the adsorbent / desorber, the drive system is downsized, thus reducing the manufacturing cost, the power consumption, and the running cost. Can be lowered.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of a gas recovery apparatus of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a sectional view taken along line CC of FIG.

5 is a sectional view taken along line DD of FIG.

FIG. 6 is a vertical sectional view of a conventional gas recovery device.

7 is a sectional view taken along line EE of FIG.

8 is a sectional view taken along line FF of FIG.

9 is a sectional view taken along line GG of FIG.

[Explanation of symbols]

 3 Bearings 4 Bearings 5 Rotating shafts 6 Keys 7 Rotary adsorption / desorption devices 8 Raw material gas inlets 8X grooves 9 Specific gas discharge ports 9X grooves 10 Product gas discharge ports 10X grooves 11 Purge gas inflow minute holes 11X grooves 12 Compartments 13 Adsorbents 14 Gas Compressor 15 Vacuum Pump 21 Upper Fixed Manifold 22 Movable Seal Plate 23 Bellows 24 Spring 25 Rotation Stop Pin 26 Lower Fixed Manifold 27 Movable Seal Plate 28 Bellows 29 Spring 30 Rotation Stop Pin 31 Thrust Bearing 32 Fixed Part 33 Motor 34 Sealing Surface 35 Sealing Surface 41 Fixed Adsorption / Desorption Device 42 Fixing Leg 51 Upper Fixed Manifold 52 Movable Seal Plate 53 Rotating Valve Plate 54 Raw Material Gas Inlet 55 All Raw Gas Grooves 56 Raw Material Gas Opening 57 Specific Gas Outlet 58 Specific Gas Full-circumferential groove 59 Specific gas opening 61 Lower part Constant manifold 62 movable seal plate 63 rotating valve plate 64 product gas discharge port 65 product gas total peripheral groove 66 the product gas opening 67 purge gas inlet 68 groove purge gas total peripheral groove 69 purge inlet micropores 70 purge gas

Front Page Continuation (72) Inventor Jun Izumi, Nagano City 1-1, Atsunoura-machi, Nagasaki Research Institute, Mitsubishi Heavy Industries Ltd. (72) Inventor, Kazuaki Oshima 1-1, Atsunoura-machi, Nagasaki Mitsubishi Heavy Industries Ltd., Nagasaki Shipyard Co., Ltd. (72 ) Hideo Nawata 2-5-1, Marunouchi, Chiyoda-ku, Tokyo Sanryo Heavy Industries Co., Ltd. (72) Inventor Akira Ishizaki 2-5-1 Marunouchi, Chiyoda-ku, Tokyo Sanryo Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1. A fixed adsorption / desorption device having a plurality of compartments along its central axis and having an adsorbent filled therein.
A first rotary valve plate having a raw material gas opening and a specific gas opening, one surface of which is in contact with one end surface of the adsorption / desorption device, is movable in the axial direction, and rotates about the same axis; And a peripheral groove for a specific gas, the surface of which is in contact with the other surface of the rotary valve plate and is movable in the axial direction but does not rotate about the same axis, an opening for product gas and a purge gas A second rotary valve plate having a groove, the surface of which is in contact with the other end face of the adsorption / desorption device, is movable in the axial direction, and rotates coaxially around the first rotary valve plate at the same speed as the first rotary valve plate; A second seal plate having a gas circumferential groove and a purge gas circumferential groove, the surface of which is in contact with the other surface of the second rotary valve plate and which is movable in the axial direction but does not rotate coaxially. The seal plate and the rotary valve plate are provided on the end faces on the respective sides of the adsorption / desorption device. Gas recovery apparatus characterized by comprising a given load mechanism attached.