CN218980986U - Oxygen purification system - Google Patents
Oxygen purification system Download PDFInfo
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- CN218980986U CN218980986U CN202222961747.6U CN202222961747U CN218980986U CN 218980986 U CN218980986 U CN 218980986U CN 202222961747 U CN202222961747 U CN 202222961747U CN 218980986 U CN218980986 U CN 218980986U
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Abstract
The utility model provides an oxygen purification system which comprises a refrigerator, a first air pipeline, a front buffer tank, a second air pipeline, a pressure swing adsorption oxygen generating device, a first oxygen pipeline, a rear buffer tank, a second oxygen pipeline and a return pipeline, wherein an inlet of the refrigerator is connected with raw material gas, an outlet of the refrigerator is communicated with the first air pipeline, the first air pipeline is communicated with the second air pipeline through the front buffer tank, the second air pipeline is communicated with an inlet of the pressure swing adsorption oxygen generating device, an outlet of the pressure swing adsorption oxygen generating device is communicated with the rear buffer tank through the first oxygen pipeline, and the rear buffer tank is communicated with an inlet of the pressure swing adsorption oxygen generating device through the second oxygen pipeline and the return pipeline in sequence. According to the oxygen purification system, the unqualified oxygen is refluxed to the adsorption tower, so that the secondary purification of the unqualified oxygen is realized, the oxygen purity is effectively improved, and the oxygen recovery efficiency of the whole system is also improved.
Description
Technical Field
The utility model relates to the technical field of oxygen production systems, in particular to an oxygen purification system.
Background
The pressure swing adsorption oxygen producing technology is one kind of air separating oxygen producing technology and mainly depends on the difference in adsorption capacity of oxygen producing molecular sieve pressure swing adsorption oxygen producing equipment to the component gases in air under different pressure to separate the component gases. The pressure swing adsorption oxygen generating equipment is widely applied to industries such as chemical industry, electronics, medical treatment, metallurgy, environmental treatment and the like.
Because the characteristics and the adsorption principle of the oxygen-making molecular sieve are limited, the molecular sieve is adopted to adsorb nitrogen molecules in the compressed air, oxygen molecules are dissociated outside the molecular sieve and are conveyed into the pipeline through pressure difference, the molecular sieve in the adsorption tower is used for separating nitrogen from oxygen in the air compressed in the environment at the beginning, the separated oxygen concentration is lower, the rising trend from the ambient oxygen concentration to the finished oxygen concentration (more than or equal to 90 percent) is shown, and oxygen in the rising process cannot be conveyed into the pipeline because the oxygen concentration does not reach the standard requirement, and can only be discharged into the air or is accumulated in the pipeline in a sealing way, so that the rising of the oxygen concentration is unfavorable.
The prior patent CN209442643U discloses an oxygen generating system for recovering unqualified oxygen, which adopts the steps that the unqualified oxygen is conveyed into an air supply pipeline through a pipeline, mixed with compressed air and then put into an adsorption tower for oxygen extraction. In practical use, because a certain pressure difference exists between the inlet air and the outlet air of the adsorption tower, the air pressure is more than 0.5MPa, for example, the air pressure of the inlet air of the adsorption tower is more than 0.45MPa, and the oxygen pressure is less than 0.4MPa, the reflux oxygen in the patent cannot be led into the compressed air pipeline because the pressure is lower than the pressure of the compressed air, and the use effect is poor.
Disclosure of Invention
The present utility model addresses the deficiencies of the prior art described above by providing an oxygen purification system.
The utility model adopts the following technical proposal to solve the defects of the technology:
an oxygen purification system is provided, which comprises a refrigerator, a first air pipeline, a front buffer tank, a second air pipeline, a pressure swing adsorption oxygen generating device, a first oxygen pipeline, a rear buffer tank, a second oxygen pipeline and a return pipeline;
the pressure swing adsorption oxygen generator is internally provided with a first air outlet pipeline, a second air inlet pipeline, a first pressure equalizing pipeline, a second pressure equalizing pipeline, a first regeneration pipeline, a second regeneration pipeline and a pressure equalizing device, wherein the first air outlet pipeline is communicated with the second air outlet pipeline through the first pressure equalizing pipeline and the second pressure equalizing pipeline respectively, the first adsorption tower is communicated with a second return pipe branch through the first regeneration pipeline, the second adsorption tower is communicated with the first return pipe branch through the second regeneration pipeline, and the first air outlet pipeline is communicated with the second air inlet pipeline through the pressure equalizing device; valves for controlling on-off are respectively arranged on the pipelines;
the pressure equalizing device comprises a second equalizing tank and a third lowering tank, wherein the inlets of the second equalizing tank and the third lowering tank are respectively communicated with a second air pipeline, and the outlets of the second equalizing tank and the third lowering tank are respectively communicated with a first oxygen pipeline.
Further, an inlet of the refrigerator is connected with the raw material gas, an outlet of the refrigerator is communicated with the first air pipeline, the first air pipeline is communicated with the second air pipeline through the front buffer tank, the second air pipeline is communicated with an inlet of the pressure swing adsorption oxygen generating device, an outlet of the pressure swing adsorption oxygen generating device is communicated with the rear buffer tank through the first oxygen pipeline, and the rear buffer tank is communicated with an inlet of the pressure swing adsorption oxygen generating device through the second oxygen pipeline and the return pipeline in sequence; and valves for controlling on-off are respectively arranged on the pipelines.
Further, the pressure swing adsorption oxygen generating device further comprises a first adsorption tower, a second adsorption tower, a first emptying pipeline and a second emptying pipeline, wherein the second air pipeline is communicated with an inlet of the first adsorption tower through a first air inlet pipeline, and an outlet of the first adsorption tower is communicated with a first oxygen pipeline through a first air outlet pipeline; the second air pipeline is communicated with an inlet of the second adsorption tower through a second air inlet pipeline, an outlet of the second adsorption tower is communicated with a first oxygen pipeline through a second air outlet pipeline, and the first air outlet pipeline and the second air outlet pipeline are respectively communicated with a first emptying pipeline and a second emptying pipeline; and valves for controlling on-off are respectively arranged on the pipelines.
Further, the inlet of the first adsorption tower is also communicated with a first return pipe branch, the inlet of the second adsorption tower is also communicated with a second return pipe branch, and the first return pipe branch and the second return pipe branch are communicated with a return pipe; and valves for controlling on-off are respectively arranged on the pipelines.
Further, the rear buffer tank is provided with a sampling port, and the sampling port is communicated with the oxygen concentration analyzer.
Further, a dust filter is arranged on the second oxygen pipe, and the first air pipe and the second oxygen pipe are both provided with flow meters.
Further, the valve is connected with the PLC in a control mode.
Compared with the prior art, the utility model has the following technical advantages:
according to the oxygen purification system, the double adsorption towers and the two-average tank and three-drop tank are arranged, so that the desorption of the molecular sieve and the separation of oxygen are realized, and the unqualified oxygen is refluxed to the adsorption towers, so that the secondary purification of the unqualified oxygen is realized, the oxygen purity is effectively improved, and the oxygen recovery efficiency of the whole system is also improved.
Drawings
FIG. 1 is a schematic system diagram of an oxygen purification system of the present utility model;
wherein the reference numerals are as follows:
a refrigerator 1; a first air line 2; a front buffer tank 3; a second air line 4; a first air intake line 5; a second air intake line 6; a first adsorption tower 7; a second adsorption tower 8; a second tank 9; a third lowering tank 10; a first outlet line 11; a second outlet line 12; a first oxygen line 13; a first equalization conduit 14; a second equalization line 15; a first regeneration line 16; a second regeneration line 17; a rear buffer tank 18; a dust filter 19; a second oxygen line 20; a return line 21; a first return line branch 22; a second return line branch 23; a first drain line 24; a second evacuation line 25.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the present embodiment provides an oxygen purification system, which includes a refrigerator 1, a first air line 2, a front buffer tank 3, a second air line 4, a pressure swing adsorption oxygen generator, a first oxygen line 13, a rear buffer tank 18, a second oxygen line 20, and a return line 21;
the pressure swing adsorption oxygen generating device is internally provided with a first air outlet pipeline 11, a second air inlet pipeline 6, a first pressure equalizing pipeline 14, a second pressure equalizing pipeline 15, a first regeneration pipeline 16, a second regeneration pipeline 17 and a pressure equalizing device, wherein the first air outlet pipeline 11 is communicated with the second air outlet pipeline 12 through the first pressure equalizing pipeline 14 and the second pressure equalizing pipeline 15 respectively, the first adsorption tower 7 is communicated with a second return pipe branch 23 through the first regeneration pipeline 16, the second adsorption tower 8 is communicated with a first return pipe branch 22 through the second regeneration pipeline 17, and the first air outlet pipeline 11 is communicated with the second air inlet pipeline 6 through the pressure equalizing device; valves for controlling on-off are respectively arranged on the pipelines;
the pressure equalizing device comprises a second equalizing tank 9 and a third lowering tank 10, wherein inlets of the second equalizing tank 9 and the third lowering tank 10 are respectively communicated with the second air pipeline 4, and outlets of the second equalizing tank 9 and the third lowering tank 10 are respectively communicated with the first oxygen pipeline 13.
In this embodiment, an inlet of the refrigerator 1 is connected with a raw material gas, an outlet of the refrigerator is connected with the first air pipeline 2, the first air pipeline 2 is connected with the second air pipeline 4 through the front buffer tank 3, the second air pipeline 4 is connected with an inlet of the pressure swing adsorption oxygen generating device, an outlet of the pressure swing adsorption oxygen generating device is connected with the rear buffer tank 18 through the first oxygen pipeline 13, and the rear buffer tank 18 is connected with an inlet of the pressure swing adsorption oxygen generating device through the second oxygen pipeline 20 and the return pipeline 21 in sequence; valves for controlling on-off are respectively arranged on the pipelines, and the valves comprise one or more of pneumatic angle valves, electromagnetic valves, ball valves, check valves and butterfly valves.
In this embodiment, the pressure swing adsorption oxygen generator further includes a first adsorption tower 7, a second adsorption tower 8, a first evacuation pipeline 24 and a second evacuation pipeline 25, where the second air pipeline 4 is communicated with an inlet of the first adsorption tower 7 through a first air inlet pipeline 5, and an outlet of the first adsorption tower 7 is communicated with a first oxygen pipeline 13 through a first air outlet pipeline 11; the second air pipeline 4 is communicated with an inlet of the second adsorption tower 8 through a second air inlet pipeline 6, an outlet of the second adsorption tower 8 is communicated with a first oxygen pipeline 13 through a second air outlet pipeline 12, and the first air outlet pipeline 11 and the second air outlet pipeline 12 are respectively communicated with a first emptying pipeline 24 and a second emptying pipeline 25; valves for controlling on-off are respectively arranged on the pipelines, and the valves comprise one or more of pneumatic angle valves, electromagnetic valves, ball valves, check valves and butterfly valves.
In this embodiment, the inlet of the first adsorption tower 7 is further connected to a first return pipe branch 22, the inlet of the second adsorption tower 8 is further connected to a second return pipe branch 23, and the first return pipe branch 22 and the second return pipe branch 23 are connected to a return pipe 21; valves for controlling on-off are respectively arranged on the pipelines, and the valves comprise one or more of pneumatic angle valves, electromagnetic valves, ball valves, check valves and butterfly valves.
In this embodiment, the dust filter 19 is disposed on the second oxygen pipeline 20, and the first air pipeline 2 and the second oxygen pipeline 20 are both provided with flow meters.
The embodiment is characterized by further comprising a PLC, wherein the PLC is used for controlling the connecting valve.
The working process of the oxygen purification system of this embodiment is as follows:
the raw material gas after being cooled, dried and purified by the refrigerator 1 enters a front buffer tank 3 through a first air pipeline 2, the front buffer tank 3 respectively enters a first adsorption tower 7 and a second adsorption tower 8 through a second air pipeline 4, and the common oxygen produced by the first adsorption tower 7 and the second adsorption tower 8 respectively enters a rear buffer tank 18 through a first air outlet pipeline 11, a second air outlet pipeline 12 and a first oxygen pipeline 13; when the oxygen concentration in the rear buffer tank 18 reaches the requirement, the oxygen is output outwards through the dust filter 19 and the second oxygen pipeline 20, after the molecular sieve adsorbs nitrogen until the molecular sieve is nearly saturated, the raw material gas is stopped and the pressure of the adsorption tower is reduced, the nitrogen adsorbed by the molecular sieve in the adsorption tower is desorbed, the molecular sieve is regenerated and recycled, and the oxygen with unqualified purity is reentered into the adsorption tower through the second oxygen pipeline 20 and the return pipeline 21 for secondary extraction, and the two adsorption tower wheel flows are switched to continuously produce oxygen.
The switching process of the adsorption tower is as follows:
1. the raw material gas enters a front buffer tank 3 through a first air pipeline 2, the front buffer tank 3 enters a second adsorption tower 8 through a second air pipeline 4 and a first air inlet pipeline 5, and the common oxygen produced by the second adsorption tower 8 enters a rear buffer tank 18 through a second air outlet pipeline 12 and a first oxygen pipeline 13 respectively;
2. oxygen in the rear buffer tank 18 enters the second adsorption tower 8 through the second oxygen pipeline 20, the return pipeline 21 and the second return pipeline branch 23 to carry out purging regeneration, meanwhile, part of oxygen produced by the first adsorption tower 7 enters the second adsorption tower 8 through the first regeneration pipeline 16, and regenerated waste gas in the second adsorption tower 8 enters the second emptying pipeline 25 to be emptied;
3. oxygen in the first adsorption tower 7 enters the second adsorption tower 8 through the first pressure equalizing pipeline 14 and the second pressure equalizing pipeline 15, so that the top pressure equalizing process of the first adsorption tower 7 to the second adsorption tower 8 is realized; oxygen in the first adsorption tower 7 enters the second adsorption tower 8 through a pressure equalizing device, so that the pressure equalizing process of the first adsorption tower 7 to the bottom of the second adsorption tower 8 is realized;
4. residual gas in the first adsorption tower 7 enters a first emptying pipeline 24;
5. switching the second adsorption tower 8, wherein raw material gas enters the front amblyseius flushing tank 3 through the first air pipeline 2, the front buffer tank 3 enters the first adsorption tower 7 through the second air pipeline 4 and the second air inlet pipeline 6, and common oxygen produced by the first adsorption tower 7 enters the rear buffer tank 18 through the first air outlet pipeline 11 and the first oxygen pipeline 13 respectively;
6. oxygen in the rear buffer tank 18 enters the first adsorption tower 7 through the second oxygen pipeline 20, the return pipeline 21 and the first return pipeline branch 22 for purging and regenerating, meanwhile, part of oxygen produced by the second adsorption tower 8 enters the first adsorption tower 7 through the second regeneration pipeline 17, and regenerated waste gas in the first adsorption tower 7 enters the first emptying pipeline 24 for emptying;
7. oxygen in the second adsorption tower 8 enters the first adsorption tower 7 through the first pressure equalizing pipeline 14 and the second pressure equalizing pipeline 15, so that the top pressure equalizing process of the second adsorption tower 8 on the first adsorption tower 7 is realized; oxygen in the second adsorption tower 8 enters the first adsorption tower 7 through the pressure equalizing device, so that the pressure equalizing process of the second adsorption tower 8 on the bottom of the first adsorption tower 7 is realized;
8. residual gas in the second adsorption tower 8 enters a second emptying pipeline 25;
9. repeating the steps 1-8.
In this embodiment, the transfer of feed gas from one column to another is controlled by pneumatic flow valves, which are precisely sequenced by a solid state programmable controller, which can automatically adjust the program according to the feed gas amount to provide cyclical stability and repeatability in producing continuous high yield quality oxygen. The controller of the Siemens PLC is implemented without the need for steady operation by an operator, and all system functions and safety locks are continuously monitored by the controller.
The foregoing description is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the scope of the utility model, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included within the scope of the present utility model.
Claims (6)
1. An oxygen purification system is characterized by comprising a refrigerator (1), a first air pipeline (2), a front buffer tank (3), a second air pipeline (4), a pressure swing adsorption oxygen generating device, a first oxygen pipeline (13), a rear buffer tank (18), a second oxygen pipeline (20) and a return pipeline (21);
the pressure swing adsorption oxygen generation device is internally provided with a first adsorption tower (7), a second adsorption tower (8), a first air outlet pipeline (11), a second air inlet pipeline (6), a first pressure equalizing pipeline (14), a second pressure equalizing pipeline (15), a first regeneration pipeline (16), a second regeneration pipeline (17) and a pressure equalizing device, wherein the first air outlet pipeline (11) is communicated with the second air outlet pipeline (12) through the first pressure equalizing pipeline (14) and the second pressure equalizing pipeline (15) respectively, the first adsorption tower (7) is communicated with a second return pipe branch (23) through the first regeneration pipeline (16), the second adsorption tower (8) is communicated with a first return pipe branch (22) through the second regeneration pipeline (17), and the first air outlet pipeline (11) is communicated with the second air inlet pipeline (6) through the pressure equalizing device; valves for controlling on-off are respectively arranged on the pipelines;
the pressure equalizing device comprises a second equalizing tank (9) and a third lowering tank (10), wherein inlets of the second equalizing tank (9) and the third lowering tank (10) are respectively communicated with a second air pipeline (4), and outlets of the second equalizing tank (9) and the third lowering tank (10) are respectively communicated with a first oxygen pipeline (13).
2. Oxygen purification system according to claim 1, characterized in that the inlet of the freezer (1) is connected to a feed gas, the outlet is connected to the first air line (2), the first air line (2) is connected to the second air line (4) via the pre-buffer tank (3), the second air line (4) is connected to the inlet of the pressure swing adsorption oxygen plant, the outlet of the pressure swing adsorption oxygen plant is connected to the post-buffer tank (18) via the first oxygen line (13), the post-buffer tank (18) is connected to the inlet of the pressure swing adsorption oxygen plant via the second oxygen line (20) and the return line (21) in sequence; and valves for controlling on-off are respectively arranged on the pipelines.
3. The oxygen purification system according to claim 1, wherein the pressure swing adsorption oxygen generating apparatus further comprises a first evacuation line (24) and a second evacuation line (25), the second air line (4) is connected to the inlet of the first adsorption tower (7) through the first air inlet line (5), and the outlet of the first adsorption tower (7) is connected to the first oxygen line (13) through the first air outlet line (11); the second air pipeline (4) is communicated with an inlet of the second adsorption tower (8) through a second air inlet pipeline (6), an outlet of the second adsorption tower (8) is communicated with a first oxygen pipeline (13) through a second air outlet pipeline (12), and the first air outlet pipeline (11) and the second air outlet pipeline (12) are respectively communicated with a first emptying pipeline (24) and a second emptying pipeline (25); and valves for controlling on-off are respectively arranged on the pipelines.
4. An oxygen purification system according to claim 3, characterized in that the inlet of the first adsorption tower (7) is further connected with a first return pipe branch (22), the inlet of the second adsorption tower (8) is further connected with a second return pipe branch (23), and the first return pipe branch (22) and the second return pipe branch (23) are connected with a return pipe (21); and valves for controlling on-off are respectively arranged on the pipelines.
5. Oxygen purification system according to claim 1, characterized in that the second oxygen line (20) is provided with a dust filter (19), and that the first air line (2) and the second oxygen line (20) are each provided with a flow meter.
6. The oxygen purification system of any one of claims 1-5, further comprising a PLC, the PLC controlling the connection valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222961747.6U CN218980986U (en) | 2022-11-07 | 2022-11-07 | Oxygen purification system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222961747.6U CN218980986U (en) | 2022-11-07 | 2022-11-07 | Oxygen purification system |
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| CN218980986U true CN218980986U (en) | 2023-05-09 |
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| CN202222961747.6U Active CN218980986U (en) | 2022-11-07 | 2022-11-07 | Oxygen purification system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116983815A (en) * | 2023-09-26 | 2023-11-03 | 上海良薇机电工程有限公司 | Adsorption filtering device and method and semiconductor process system |
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2022
- 2022-11-07 CN CN202222961747.6U patent/CN218980986U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116983815A (en) * | 2023-09-26 | 2023-11-03 | 上海良薇机电工程有限公司 | Adsorption filtering device and method and semiconductor process system |
| CN116983815B (en) * | 2023-09-26 | 2024-02-06 | 上海良薇机电工程有限公司 | Adsorption filtering device and method and semiconductor process system |
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