JPH0523526A - Rotary type gas recovery device - Google Patents

Abstract

PURPOSE:To prevent the leakage of gas from the gaps between a rotary type absorbing and desorbing device and respective seal plates by making the respective seal plates provided to both end surfaces of the rotary adsorbing and desorbing device movable in the axial direction of the adsorbing and desorbing device and providing load applying mechanisms pressing the seal plates to the respective end surfaces. CONSTITUTION:A rotary type adsorbing and desorbing device 7, the upper movable seal plate 22 having a raw material gas inflow port 8 and provided to one end surface of the adsorbing and desorbing device 7 and the lower movable plate 27 having a product gas discharge port 10 and provided to the other end surface of the absorbing and desorbing device 7 are mounted. The respective seal plates 22,27 are made movable in the direction of a rotary shaft 5 and pressed to the respective end surfaces of the absorbing and desorbing device 7 by load applying mechanisms composed of springs 24, 29. As a result, the leakage of gas from the gaps between the rotary type adsorbing and desorbing device and the respective seal plates can be prevented.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a rotary gas recovery device.

[0002]

2. Description of the Related Art FIG. 5 is a vertical sectional view of a conventional rotary gas recovery apparatus, FIG. 6 is a sectional view taken along the line DD of FIG. 5, and FIG. 7 is taken along the line EE of FIG.
A sectional view and FIG. 8 are sectional views taken along the line FF in FIG. In the figure, 1 is an upper fixed seal plate, 2 is a lower fixed seal plate, 3
And 4 are bearings provided on the seal plates, 5
Is a rotary shaft supported and rotated by the bearing, 6 is a key mounted on the rotary shaft, 7 is fixed to the rotary shaft 5 by the key, and is interposed between the upper fixed seal plate 1 and the lower fixed seal plate 2. A rotating rotary adsorption / desorption device, 8 is a raw material gas inlet provided in the upper fixed seal plate 11, 9 is a specific gas discharge port provided in the upper fixed seal plate 1, 10
Is a product gas exhaust port provided in the lower fixed seal plate 2, 11 is a minute hole for purging gas inflow provided in the lower fixed seal plate, and 12 are a plurality of axially provided in the rotary adsorption / desorption device and are vertically arranged. And 13 are adsorbents filled in each of the compartments, 14 is a gas compressor connected to the raw material gas inlet port 8 to pressurize the raw material gas, and 15 is the specific gas discharge port. 9, a vacuum pump for sucking and recovering a specific gas under reduced pressure, discharging and collecting, 16 a sealing surface between the upper fixed seal plate 1 and the rotary adsorption / desorption device 7, 17 a rotary suction plate for the lower fixed seal plate 2. It is a sealing surface between the desorber 7.

In the above apparatus, the raw material gas enters the compartment 12 connected to the raw material gas inlet 8 of the rotary adsorption / desorption device 7 from the raw material inlet 8 by the gas compressor 14 and the adsorbent 13 filled therein. The specific gas is adsorbed by, and the gas not adsorbed, that is, the product gas is discharged through the product gas outlet 10. On the other hand, when the compartment filled with the adsorbent adsorbing the specific gas is connected to the specific gas outlet 9 by the rotation of the adsorption / desorption device 7, the specific gas is separated from the adsorbent 13 by the depressurizing action of the vacuum pump 15. It is discharged and collected. In this state, the purge gas is injected through the purge gas inflow minute holes of the lower fixed seal plate 2 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.

[0004]

SUMMARY OF THE INVENTION In the above device,
Since the adsorption / desorption device 7 rotates and the upper and lower sealing plates 1 and 2 are fixed, it is not possible to completely join the mating surfaces to each other, and a sealing surface having a gap is formed, so that the raw material gas is transferred from the sealing surface 16 to the outside. Leak. Further, the external gas flows into the specific gas discharge port 9 through the sealing surface 16 at the time of collecting the specific gas. There is no particular problem in terms of performance if these leaked gases are less than 1% of the supply gas amount. However, if the capacity of the device is increased and the size of the device is increased, the processing accuracy of the seal plates 1 and 2 is reduced. , 17 increases, resulting in a decrease in performance due to an increase in the amount of leaked gas. Since the amount of leaked gas is proportional to the third power of the gap, its influence is extremely large. Further, due to the wear of the sealing surface, the gap increases, which causes a problem of performance deterioration over time. In order to prevent this, it is necessary to frequently perform maintenance, which increases running costs.

The present invention aims to solve the above-mentioned drawbacks of the prior art and to provide a rotary gas recovery apparatus in which gas leakage does not occur.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and is a rotary suction device having a cylindrical appearance and having a plurality of axial compartments therein and rotating about its axis. A desorber, a seal plate having a raw material gas inflow port provided on one end face of the adsorption / desorption device and not rotating around the shaft, and a product gas discharge port provided on the other end face of the adsorption / desorption device around the shaft. In the rotary gas recovery device having a non-rotating seal plate, each of the seal plates can be moved in the direction of the shaft, and a loading mechanism for pressing the seal plates against the end faces is provided. The present invention relates to a characteristic rotary gas recovery device.

[0007]

In the present invention, since the seal plate is pressed against each end surface of the rotary adsorption / desorption device by the load applying mechanism, no gap is generated between each end surface and the seal plate, and therefore gas leakage is prevented. Get off.

[0008]

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.
FIG. 3 is a sectional view taken along line CC of FIG. In the figure, 21 is an upper fixed manifold, 22 is an upper movable seal plate that can move only in a direction parallel to the rotary shaft 5, 23 is a bellows provided between the manifold 21 and the seal plate 22, and 24 is A spring 25 is provided between the manifold 21 and the seal plate 22, and 25 is the upper movable seal plate 22.
It is a rotation stop pin that suppresses the rotation of the. 26 is a lower fixed manifold, 27 is a lower movable seal plate that can move only in a direction parallel to the rotary shaft 5, 28 is a bellows provided between the manifold 26 and the seal plate 27, and 29 is the manifold 26. And a seal plate 27, a spring is provided between the lower movable seal plate 27 and a seal pin 27. Further, 31 is a thrust bearing for supporting the weight of the rotary adsorption / desorption device 7, and is provided between the adsorption / desorption device 7 and the fixed portion 32. Bearing 3
Is provided between the rotary shaft 5 and the upper fixed manifold 21, and the bearing 4 is provided between the rotary shaft 5 and the fixed portion 32. Three
Reference numeral 3 is a motor that drives the rotary shaft 5. In the parts other than the above, the parts having the same functions as those in the prior art are denoted by the same reference numerals as those in the prior art, and the description thereof will be omitted. Further, the operation relating to the gas recovery of the present invention is the same as that of the conventional device.

In this embodiment, instead of the upper and lower fixed seal plates in the prior art, a movable seal plate that can move in the axial direction is provided, and fixed manifolds are provided on the upper and lower sides of each, and a bellows connects them. Then, a spring is provided between the stationary manifold and the fixed manifold as a loading mechanism for pressing the seal plate against the end of the rotary adsorption / desorption device. Since the sealing plate is pressed against the sliding portion of the end surface of the adsorption / desorption device, no gap is generated in the upper and lower sealing surfaces 34 and 35,
Gas leakage is prevented, and gas recovery cost can be significantly reduced.

[0010]

In the rotary gas recovery apparatus of the present invention, each seal plate on both end faces of the rotary adsorption / desorption device is made movable in the axial direction, and each seal plate is pressed against each end face. Since the loading mechanism is provided, it is possible to prevent leakage of gas on the sealing surface.

[Brief description of drawings]

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

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

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

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

FIG. 5 is a vertical cross-sectional view of a conventional rotary gas recovery device.

6 is a cross-sectional view taken along line DD of FIG.

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

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

[Explanation of symbols]

 1 Upper Fixed Seal Plate 2 Lower Fixed Seal Plate 3 Bearing 4 Bearing 5 Rotating Shaft 6 Key 7 Rotary Adsorption / Desorption Device 8 Raw Material Gas Inlet 9 Specific Gas Outlet 10 Product Gas Outlet 11 Purge Gas Inflow Micropore 12 Compartment 13 Adsorbent 14 Gas compressor 15 Vacuum pump 16 Sealing surface 17 Sealing surface 21 Upper fixed manifold 22 Upper movable seal plate 23 Bellows 24 Spring 25 Rotation stop pin 26 Lower fixed manifold 27 Lower 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

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuaki Oshima 1-1 1-1 Atsunoura-machi, Nagasaki-shi Nagasaki Shipyard Co., Ltd.

Claims (1)

Claim: What is claimed is: 1. A rotary adsorbing / desorbing device, which has a cylindrical appearance and has a plurality of axial compartments therein, and which rotates around its axis, and a raw material gas inlet. A rotary gas provided with one end face of the adsorption / desorption device that does not rotate around the shaft, and a seal plate that has a product gas outlet and that is provided on the other end face of the adsorption / desorption device that does not rotate around the shaft. A rotary gas recovery apparatus, characterized in that, in the recovery apparatus, each of the seal plates is movable in the direction of the axis, and a loading mechanism for pressing each of the seal plates against each of the end faces is provided.