JPH0647054B2 - Pressure swing type mixed gas separator - Google Patents

Description

TECHNICAL FIELD The present invention relates to two separation cylinders in which a separation agent such as an adsorbent or an absorbent is filled in a cylinder, and the two separation cylinders are installed upright side by side in each separation cylinder. ,
An untreated mixed gas is supplied at a high pressure from one of the two openings formed in the cylinder to allow the separating agent to adsorb or absorb one or more kinds of gas, and the separated processed gas is opened to the other opening. From the separation process and the other opening to reduce the pressure of a part of the treated gas into the separation cylinder and supply it to remove the gas adsorbed or absorbed by the separating agent from the separating agent. The regeneration process to release is 2
The present invention relates to a pressure swing type mixed gas separation device in which a plurality of on-off valves are alternately switched at regular intervals in a separation cylinder of a book, and particularly to a mixed gas separation device capable of being integrated into a small volume. Regarding the device.

2. Description of the Related Art Conventional pressure swing type mixed gas separation devices generally have the following problems.
The two openings of the two separation cylinders are formed at the upper and lower ends so that the gas rises or descends inside the separation cylinders for separation or regeneration, and switching between the separation stroke and the regeneration stroke is performed. Since the on-off valve was arranged above and below the two separation cylinders and connected by piping, it was bulky and required a large installation space. Not only was the installation location limited, but the switching valves were dispersed. Because it is placed,
There were some drawbacks, such as the difficulty of maintenance and inspection.

Means for Solving the Problems The present invention provides a means for eliminating such drawbacks.
The two separation cylinders are provided with two openings arranged side by side on the upper surface of the cylinder body so that the untreated mixed gas or the treated gas circulates in the cylinder body, and at the same time, on the upper surfaces of the two separation cylinders, A manifold plate with an unprocessed mixed gas supply port and a processed gas discharge port is installed approximately horizontally, and each opening of the separation cylinder is connected to the opening formed on the lower surface of the manifold plate. Is attached to the manifold plate so as to open and close the plurality of flow paths formed in the manifold plate, and the unprocessed mixed gas and the processed gas form the plurality of flow paths formed in the manifold plate by the switching operation of the plurality of open / close valves. The separation process and the regeneration process are performed by selecting and distributing.

The operation and effect of the invention The present invention has the above-described structure, and two openings of two separation cylinders are formed on the upper surface of each cylinder so that the gas circulates in the cylinder to perform the separation stroke and the regeneration stroke. The manifold plate attached to the upper surface of the manifold plate has an unprocessed mixed gas supply port and a processed gas discharge port, and a plurality of on-off valves for switching between the separation process and the regeneration process. Since it is attached to the main unit, complicated piping is not required, the entire device can be compacted, it can be installed in a narrow space, and the on-off valves are concentrated in one place for maintenance and inspection. There is an effect that it is easy.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

This embodiment shows an example in which the present invention is applied to a dehumidifier for removing water vapor from a compressed gas mixed with water vapor. First, the system of the dehumidifier will be described with reference to FIGS. Total of 8 pairs of 4 pairs of right and left switching channels
1st to 8th opening / closing valves 1 to 8 are opened by opening the 1st, 4th and 5th opening / closing valves 1, 4 and 5 as shown in FIG.
When the second, third and sixth on-off valves 2, 3 and 6 are closed and both the seventh and eighth on-off valves 7 and 8 are closed, as shown by the thick solid line in FIG. The high-pressure unprocessed gas supplied from the first pass through the first on-off valve 1 and the first separation cylinder 11 on the left side, which is filled with the adsorbent a such as silica gel, filters the filter 1.
The gas that has been dehumidified by adsorbing water vapor on the adsorbent a after passing through the filter 13 is discharged from the discharge port 10 through the fifth opening / closing valve 5, and is also dehumidified. A part of the gas of the first separation cylinder 11 flows into the bypass cylinder 14 at the exit of the filter 13 at the outlet of the first separation cylinder 11, and as shown by the thin solid line in the figure, the first auxiliary separation that is also filled with the adsorbent a. After being further dehumidified through the tube 15, it is depressurized by passing through the throttle valve 17 to significantly reduce the humidity, and while passing through the second auxiliary separation tube 16, the water adsorbed from the adsorbent a therein is removed. While removing the adsorbent a and regenerating the adsorbent a while keeping the low humidity still, the filter 13
The second separation cylinder 1 on the right side, which is also filled with the adsorbent a through
2 and the moisture adsorbed by the adsorbent a is removed to regenerate the adsorbent a, and then the adsorbent a is discharged through the fourth opening / closing valve 4 through the filter 13 and then discharged from the discharge port 19 for a certain period of time. Before switching the first to sixth on-off valves 1 to 6 by
When the fourth opening / closing valve 4 is closed and the eighth opening / closing valve 8 is opened, in addition to the regeneration gas that has passed through the auxiliary separating cylinders 15 and 16, the fifth opening / closing valve 5 is opened as shown by the broken arrow in FIG. A part of the dehumidified gas that has passed through passes through the throttle valve 20, passes through the eighth opening / closing valve 8 and flows into the second separation cylinder 12, whereby the pressure therein is rapidly increased, and the inside of the second separation cylinder 12 becomes After reaching the same pressure as in the first separation cylinder 11, as shown in FIG.
When the open / closed states of the first to sixth open / close valves 1 to 6 are switched in the opposite manner to the above, there is no abrupt pressure drop at the discharge port 10, and as shown by the thick solid line in FIG. Passes through the second on-off valve 2 and flows through the second separation cylinder 12 to be dehumidified, and the dehumidified gas passes through the sixth on-off valve 6 and is discharged from the discharge port 10, and is shown by a thin solid line in FIG. As described above, a part of the dehumidified gas flows into the bypass pipe 14 from the opposite side, is further dehumidified by the second auxiliary separation cylinder 16 and passes through the throttle valve 17 to remarkably reduce the humidity. The first separation cylinder 1 while regenerating 15 adsorbents a
1 and regenerates the adsorbent a, then passes through the third opening / closing valve 3 and is discharged from the outlet 19, and the third opening / closing valve 3 is closed before switching the first to sixth opening / closing valves 1 to 6 again. , 7th
When the opening / closing valve 7 is opened, in addition to the regeneration gas through the auxiliary separating cylinders 16 and 15, a part of the dehumidified gas that has flowed out of the sixth opening / closing valve 6 passes through the throttle valve 20 and then enters the first separating cylinder 11. By inflowing, the pressure therein is rapidly increased, and after the inside of the first separation cylinder 11 reaches the same pressure as the inside of the second separation cylinder 12, the seventh opening / closing valve 7 is closed and the first to sixth opening / closing operations are performed. The operation described with reference to FIG. 1 is repeated by switching the valves 1 to 6, and the switching operation of the first to eighth opening / closing valves 1 to 8 is performed at regular intervals, so that one separation cylinder 11 or 12 is not processed. While the gas is being dehumidified, the adsorbent a is regenerated by the other separation cylinder 12 or 11, and the third or fourth on-off valve 3, 4 is closed immediately before the switching, and the seventh or the seventh 8 By opening the on-off valves 7 and 8, inside the separation cylinder 12 or 11 on the regeneration stroke side In the short time at the same pressure, and summer as minimize the pressure fluctuation of the dehumidifying gas used from the discharge port 10 when switching.

Next, the structure of the present embodiment will be described with reference to FIGS. 3 to 5. The first and second separation cylinders 11 and 12 described above are erected side by side on the mount 21, and each separation cylinder 11 is provided. , 12 are
As shown in FIG. 4, the lid 24 attached to the open cylinder 23 of the cylinder 22 with the lower surface closed and the open cylinder 23 formed on the upper surface has the first opening 25 located at the center of the cylinder 22 and the outer peripheral side. And the second opening 26 located at the second opening 26 is formed, and the introduction pipe 27 connected to the first opening 25 hangs down to the bottom surface side of the cylindrical body 22 and its lower end is covered with the wire net 28, so that the second opening 26 is directly opened. 23. When the adsorbent a such as silica gel is filled from the charging cylinder 29 on the upper surface into the cylindrical body 22 and the untreated gas is supplied to the first opening 25, the introduction pipe 27 is connected to the inside of the cylindrical body 22. It passes through the lower end of the passage and flows upward between the adsorbent a and is guided to the second opening 26. On the other hand, when the treated gas is supplied to the second opening 26, it flows downward between the adsorbent a. After that, when the gas flows upward in the introduction pipe 27 and is guided to the first opening 25, the gas flows in the cylindrical body 22. They are circulated to each other, and on the upper surfaces of the lids 24 and 24 in which the openings 25 and 26 of the two separation cylinders 11 and 12 are formed, the unprocessed gas supply port 9 and the dehumidified gas described above are provided. A horizontal first manifold plate 30 having the discharge port 10 is attached, and openings 31, 32 communicating with the first and second openings 25, 26 of the separation cylinders 11, 12 are attached to the lower surface of the first manifold plate 30. Are formed, and the openings 33a, 34a, 3 communicating with the respective openings 31, 32 are formed.
3b and 34b are formed on the upper surface and the flow path 35a between them is formed,
In the middle of 36a, 35b, 36b, the filter 1
3 is interposed, and on the upper surface thereof, openings 39 and 40 communicating with the supply port 9 and the discharge port 10 via the flow paths 37 and 38, and a gas after regenerating the adsorbent a are provided. An opening 41 communicating with the discharge port 19 is formed, and further, on the lower surface on the side opposite to the side where the supply port 9 and the discharge port 10 are formed, the above-mentioned small size 2 which has substantially the same structure as the separation cylinders 11 and 12. Auxiliary separation cylinders 15 and 16 of a book are attached, and openings 42a and 4a, which communicate with the openings of the auxiliary separation cylinders 15 and 16 on the upper surface
3a, 42b, 43b are formed, and on this first manifold plate 30, an insole plate 44 having a plurality of through holes 44a communicating with the above-mentioned plurality of openings of the upper surface is attached, and on top of that, A second manifold plate 45 having therein a plurality of flow paths connecting the openings on the upper surface of the first manifold plate 30 is attached.
The eight on-off valves 1 to 8 for opening and closing each flow path are attached to the above, and further, the throttle valve 17 interposed between the two auxiliary separation cylinders 15 and 16 and the separation cylinders 11 and 12. A throttle valve 20 for pressure adjustment is attached.

Next, a specific gas flow path will be described with reference to FIGS. 6 and 7. First, the first, fourth and fifth on-off valves 1, 4 and 5 are opened to open the second, third and 6th on-off valve 2, 3
And 6 are closed, the seventh and eighth on-off valves 7, 8 are closed.
6 is closed, the unprocessed gas supplied to the supply port 9 passes through the flow path 37 continuing from the supply port 9 in the first manifold plate 30 and opens on the upper surface, as shown by the thick solid line in FIG. Three
9 to the flow path of the second manifold plate 45, through the valve opening of the first on-off valve 1 on the way, and again through the opening 33a of the first manifold plate 30 and the flow path 35a therein to make the first separation. The first separation cylinder 11 is guided to the first opening 25 of the cylinder 11.
The gas dehumidified by circulating inside flows out from the second opening 26, passes through the flow path 36a in the first manifold plate 30, flows from the opening 34a on the upper surface into the flow path in the second manifold plate 45, and in the middle thereof. The gas is discharged from the discharge port 10 through the opening of the fifth on-off valve 5, the opening 47 of the first manifold plate 30 and the flow path 38 therein, and as shown by the thin solid line in FIG. Part of the treated gas that has flowed out of the second opening 26 of the separation cylinder 11 passes through the flow path in the second manifold plate 45, flows from the opening 42a of the first manifold plate 30 to the first auxiliary separation cylinder 15, and And then open again 43
a through the flow path of the second manifold plate 45, passing through the throttle valve 17 in the middle thereof, and then from the opening 43b of the first manifold plate 30 to the second auxiliary separation cylinder 16 and circulating therein, and then the opening. 42b through the flow path of the second manifold plate 45, through the opening 34b of the first manifold plate 30 through the flow path 36b therein, to the second opening 26 of the second separation cylinder 12, and the second separation cylinder 12 After being circulated in the inside, it exits from the first opening 25 and flows through the flow path 35b in the first manifold plate 30.
Through the opening 33b to the flow path of the second manifold plate 45, and through the valve opening of the fourth on-off valve 4 on the way to the flow path from the opening 41 of the first manifold plate 30 to the discharge port 19. , Is discharged from the discharge port 19. Then, when the fourth opening / closing valve 4 is closed and the eighth opening / closing valve 8 is opened, as shown by the broken line in the figure, the flow path is branched to the fifth manifold opening / closing valve 5 of the second manifold plate 45. A part of the treated gas flows, passes through the throttle valve 20 in the middle thereof, and then passes through the valve opening of the eighth opening / closing valve 8, joins with the above-mentioned gas for regeneration, and joins the second separation cylinder 12
To increase the pressure of the second separation cylinder 12.

Next, when the eighth open / close valve 8 is closed and the open / closed states of the first to sixth open / close valves 1 to 6 are switched in the opposite manner to the above, the supply is performed to the supply port 9 as shown by the thick solid line in FIG. The untreated gas also passes through the flow path 37 continuing to the supply port 9 in the first manifold plate 30 and flows from the opening 39 on the upper surface to the flow path provided with the second opening / closing valve 2 of the second manifold plate 45. It is guided through the valve opening of the second on-off valve 2 from the opening 33b of the first manifold plate 30 to the first opening 25 of the second separation cylinder 12 through the flow passage 35b therein, and inside the second separation cylinder 12 The gas that has been circulated and dehumidified exits from the second opening 26, passes through the flow path 36b in the first manifold plate 30, flows from the opening 34b into the flow path in the second manifold plate 45, and is in the middle of the sixth.
While being discharged from the discharge port 10 through the valve opening of the opening / closing valve 6 and the flow path 38, as shown by a thin solid line in the figure,
Part of the treated gas that has exited from the second opening 26 of the second separation cylinder 12 passes through the flow path in the second manifold plate 45, flows into the second auxiliary separation cylinder 16 and circulates therein, and then returns to the second auxiliary separation cylinder 16. The throttle valve 17 flowing in the flow path of the manifold plate 45 and on the way
After flowing through the first auxiliary separation cylinder 15 and circulating therein, it is guided to the second opening 26 of the first separation cylinder 11,
After circulating in the first separation cylinder 11, it exits from the first opening 25 and passes through the flow path 35a in the first manifold plate 30 to open the opening 3
3a to the flow path of the second manifold plate 45, passing through the valve opening of the third on-off valve 3 on the way to the first manifold plate 3
It flows from the opening 41 of 0 to the flow path following the discharge port 19 and is discharged from the discharge port 19. Then, when the third on-off valve 3 is closed and the seventh on-off valve 7 is opened, as shown by the broken line in FIG.
A part of the treated gas flows through the branch passage of the flow path provided with the sixth opening / closing valve 6 of the second manifold plate 45, passes through the throttle valve 20 in the middle thereof, and then passes through the valve opening of the seventh opening / closing valve 7. , Is merged with the above-mentioned gas for regeneration and guided to the first separation cylinder 11,
The pressure of the first separation cylinder 11 is increased.

In this embodiment, since the on-off valves 1 to 8 are formed into a manifold, the volume of the on-off valves 1 to 8 itself is 5 compared to the conventional case.
It was 0%, and the overall size of the device was 60%.

In the above embodiment, the present invention is shown as an example in which the present invention is applied to a dehumidifying device that removes water vapor in a compressed gas, but a device used to separate nitrogen and oxygen mixed in the air, etc. It can also be applied to other mixed gas separators, and the separating agent for separating one or more gases from other gases can be used as a separating agent depending on the type of gas to be treated and the purpose. In addition to the silica gel, the adsorbent such as activated alumina, molecular sieves or activated carbon, or the adsorbent such as lithium chloride may be appropriately used.

[Brief description of drawings]

1 and 2 are system configuration diagrams of a dehumidifying device to which an embodiment of the present invention is applied, FIG. 3 is a partially cutaway plan view of this embodiment, and FIG. 4 is a sectional view taken along the line AA of FIG. 5 is a cross-sectional view taken along the line BB of FIG. 3, and FIGS. 6 and 7 are plan views with gas passages. a: adsorbent, 1-8: 1st-8th opening / closing valve, 9: supply port, 1
0: discharge port, 11, 12: first and second separation cylinders, 15, 1
6: 1st, 2nd auxiliary separation cylinder, 22: cylindrical body, 25, 26:
First and second openings, 30: First manifold plate, 31, 3
2: Opening, 45: Second manifold plate

Claims (2)

[Claims] 1. Two separation cylinders in which a separating agent such as an adsorbent or an absorbent is filled in a cylinder are installed in parallel, and in each of the separation cylinders,
The untreated mixed gas is supplied at a high pressure from one of the two openings formed in the cylindrical body, and one or more gases are adsorbed or absorbed by the separating agent to separate the treated gas from the other. And a separation process of discharging from the opening of the separation gas, and a part of the treated gas is depressurized and supplied into the separation cylinder from the other opening to remove the gas adsorbed or absorbed by the separation agent from the separation agent. In the pressure swing type mixed gas separation apparatus, the regeneration stroke discharged from the one opening is alternately performed at fixed time intervals by switching operation of a plurality of opening / closing valves in the two separation cylinders. Of the two separation cylinders while the two openings are juxtaposed on the upper surface of the cylinder so that the unprocessed mixed gas or the treated gas circulates in the cylinder. Untreated on top A manifold plate having a combined gas supply port and a treated gas discharge port is installed substantially horizontally, and the respective openings of the separation cylinder are connected to the openings formed on the lower surface of the manifold plate, and the plurality of opening / closing units are provided. A valve is attached to the manifold plate so as to open and close a plurality of flow paths formed in the manifold plate, and the unprocessed mixed gas and the processed gas are stored in the manifold plate by a switching operation of the plurality of opening / closing valves. A pressure swing type mixed gas separation device characterized in that the separation step and the regeneration step are performed by selecting and circulating the formed plurality of flow paths. 2. An auxiliary separation cylinder provided in a flow path for supplying a part of the treated gas to a separation cylinder on the regeneration side is attached to the lower surface of the manifold plate. The pressure swing type mixed gas separation device according to the first aspect.