CN112408342A - Normal temperature natural gas helium extraction and purification system - Google Patents
Normal temperature natural gas helium extraction and purification system Download PDFInfo
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- CN112408342A CN112408342A CN202011334368.3A CN202011334368A CN112408342A CN 112408342 A CN112408342 A CN 112408342A CN 202011334368 A CN202011334368 A CN 202011334368A CN 112408342 A CN112408342 A CN 112408342A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
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- C01B23/00—Noble gases; Compounds thereof
- C01B23/001—Purification or separation processes of noble gases
- C01B23/0036—Physical processing only
- C01B23/0042—Physical processing only by making use of membranes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B23/00—Noble gases; Compounds thereof
- C01B23/001—Purification or separation processes of noble gases
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- C01B23/0052—Physical processing only by adsorption in solids
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Abstract
本发明公开了一种常温天然气氦气提取提纯系统，包括一级膜分离器，二级一段膜分离器，二级二段膜分离器和变压吸附单元；所述一级膜分离器渗透气出口连接压缩机后连接二级一段膜分离器入口；所述一级膜分离器非渗透气出口接入管网继续向外输送天然气；所述二级一段膜分离器渗透气出口连接压缩机后连接变压吸附单元后获得高纯氦气；所述二级一段膜分离器非渗透气出口连接二级二段膜分离器入口；所述二级二段膜分离器渗透气出口连接压缩机后连接二级一段膜分离器，该系统采用很低的能耗将天然气中的氦气提纯，也可以对液化天然气过程中的闪蒸气（BOG）中的氦气进行提纯，有很好的应用效果。
The invention discloses a normal temperature natural gas helium extraction and purification system, comprising a first-stage membrane separator, a second-stage one-stage membrane separator, a second-stage second-stage membrane separator and a pressure swing adsorption unit; the first-stage membrane separator permeate gas After the outlet is connected to the compressor, it is connected to the inlet of the second-stage membrane separator; the non-permeate gas outlet of the first-stage membrane separator is connected to the pipeline network to continue to transport natural gas to the outside; the permeate gas outlet of the second-stage membrane separator is connected to the compressor. After connecting the pressure swing adsorption unit, high-purity helium gas is obtained; the non-permeable gas outlet of the second-stage first-stage membrane separator is connected to the inlet of the second-stage second-stage membrane separator; the permeate gas outlet of the second-stage second-stage membrane separator is connected to the compressor. Connected to the second-stage membrane separator, the system uses very low energy consumption to purify helium in natural gas, and can also purify helium in flash gas (BOG) in the liquefied natural gas process, with good application effects. .
Description
Technical Field
The invention relates to the field of gas separation, in particular to a normal-temperature natural gas helium extraction and purification system.
Background
With the rapid development of modern science and technology, helium is used as a non-renewable rare gas and is widely applied in the fields of medical treatment, electronics, national defense, military industry and the like, the content of helium in natural gas is very low, the energy consumption of a conventional low-temperature extraction process is huge, and the removal of part of impurities is difficult to control.
Disclosure of Invention
In order to overcome the defects, the normal-temperature natural gas helium extraction and purification system is provided, the helium in the natural gas is purified by adopting very low energy consumption, the helium in flash evaporation gas (BOG) in the process of liquefying the natural gas can also be purified, and the system has a good application effect.
The technical scheme adopted by the invention for realizing the purpose is as follows: a normal temperature natural gas helium extraction and purification system comprises a first-stage membrane separator (1), a second-stage first-stage membrane separator (7), a second-stage membrane separator (8) and a pressure swing adsorption unit (11);
the permeation gas outlet of the first-stage membrane separator (1) is connected with the compressor (2) and then is connected with the inlet of the second-stage first-stage membrane separator (7); the non-permeable gas outlet of the primary membrane separator (1) is connected with a pipe network to continuously convey natural gas outwards;
the permeation gas outlet of the second-stage first-stage membrane separator (7) is connected with the compressor (2) and then connected with the pressure swing adsorption unit (6) to obtain high-purity helium;
the non-permeate gas outlet of the second-stage first-stage membrane separator (7) is connected with the inlet of the second-stage membrane separator (8);
the permeation gas outlet of the second-stage membrane separator (8) is connected with the compressor (2) and then connected with the second-stage first-stage membrane separator (7); and a non-permeable gas outlet of the second-stage two-section membrane separator (8) is connected to a pipe network to continuously convey natural gas outwards.
Furthermore, a permeation gas outlet of the primary membrane separator (1) is connected with the compressor (2), then is connected with the dehydrogenation unit (3) and the decarburization unit (4) for rough treatment, and then is connected with an inlet of the secondary primary membrane separator (7).
Furthermore, a permeation gas outlet of the second-stage first-stage membrane separator (7) is connected with the compressor (2), then is connected with the dehydrogenation unit (3), is subjected to fine treatment, and then is connected with the pressure swing adsorption unit (6).
Furthermore, a permeating gas outlet of the first-stage membrane separator (1) is connected with a compressor (2) and then is connected with an inlet of a third-stage membrane separator (5), and a permeating gas outlet of the third-stage membrane separator (5) is connected with an inlet of a second-stage first-stage membrane separator (7) after being connected with the compressor (2); and a non-permeable gas outlet of the three-stage membrane separator (5) is connected with the compressor (2) and then is connected into a pipe network to continuously convey natural gas outwards.
Further, a desorption gas outlet of the decarburization unit (4) is connected into a pipeline network to continuously convey natural gas outwards.
Further, the non-permeable gas outlet of the second-stage membrane separator (8) is connected with the inlet of the third-stage membrane separator (5).
Further, a desorption gas outlet of the pressure swing adsorption unit (6) is connected with an outlet of the primary membrane separator (1) for circulation.
The invention has the beneficial effects that: the system solves the problem of high energy consumption of extracting and concentrating helium from natural gas and flash gas (BOG) in the natural gas liquefaction process, and adopts a normal-temperature process route to purify the helium.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a block diagram of embodiment 1 of the system.
Fig. 2 is a block diagram of embodiment 2 of the system.
In the figure: 1. a primary membrane separator; 2. a compressor; 3. a dehydrogenation unit; 4. a decarbonization unit; 5. a tertiary membrane separator; 6. a pressure swing adsorption unit; 7. a second-stage first-stage membrane separator; 8. a second-stage two-section membrane separator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, a system for extracting and purifying natural gas and helium at normal temperature, comprises a primary membrane separator 1, a secondary first-stage membrane separator 7, a secondary second-stage membrane separator 8 and a pressure swing adsorption unit 11; the desorbed gas outlet of the pressure swing adsorption unit 6 is connected with the outlet of the first-stage membrane separator 1 for circulation;
the permeation gas outlet of the first-stage membrane separator 1 is connected with the compressor 2 and then connected with the inlet of the second-stage first-stage membrane separator 7; the non-permeable gas outlet of the primary membrane separator 1 is connected to a pipe network to continuously convey natural gas outwards;
the permeation gas outlet of the second-stage first-stage membrane separator 7 is connected with the compressor 2 and then connected with the pressure swing adsorption unit 6 to obtain high-purity helium; the non-permeate gas outlet of the second-stage first-stage membrane separator 7 is connected with the inlet of a second-stage membrane separator 8;
the permeation gas outlet of the second-stage membrane separator 8 is connected with the compressor 2 and then connected with the second-stage first-stage membrane separator 7; and a non-permeable gas outlet of the second-stage two-section membrane separator 8 is connected to a pipe network to continuously convey natural gas outwards.
Example 2
As shown in fig. 2, comprises a first-stage membrane separator 1, a second-stage first-stage membrane separator 7, a second-stage membrane separator 8 and a pressure swing adsorption unit 11;
the permeation gas outlet of the primary membrane separator 1 is connected with a compressor 2, then connected with a dehydrogenation unit 3 and a decarburization unit 4 for rough treatment, and then connected with the inlet of a tertiary membrane separator 5, the permeation gas outlet of the tertiary membrane separator 5 is connected with the compressor 2, then connected with the inlet of a secondary primary membrane separator 7, and the non-permeation gas outlet of the primary membrane separator 1 is connected with a pipe network to continuously convey natural gas outwards; a desorption gas outlet of the decarburization unit 4 is connected to a pipe network to continuously convey natural gas outwards;
the permeation gas outlet of the second-stage first-stage membrane separator 7 is connected with the compressor 2, then is connected with the dehydrogenation unit 3 for fine treatment, and then is connected with the pressure swing adsorption unit 6 to obtain high-purity helium; the desorbed gas outlet of the pressure swing adsorption unit 6 is connected with the outlet of the first-stage membrane separator 1 for circulation; the non-permeate gas outlet of the second-stage first-stage membrane separator 7 is connected with the inlet of a second-stage membrane separator 8;
the permeation gas outlet of the second-stage membrane separator 8 is connected with the compressor 2 and then connected with the inlet of the second-stage first-stage membrane separator 7; and the non-permeate gas outlet of the second-stage membrane separator 8 is connected with the inlet of the third-stage membrane separator 5.
Taking the embodiment 2 as an example, the working principle is as follows: the content of helium in natural gas is very low, the helium is preliminarily concentrated by a primary membrane separator, enters a catalytic dehydrogenation unit to remove hydrogen in the helium, and then enters a decarburization unit to remove carbon dioxide in the hydrogen; the tail gas of the decarburization device is compressed and pressurized and then returns to a pipe network; the natural gas without impurities enters a third-stage membrane separator for further concentration, then enters a compressor for pressurization and enters a second-stage first-stage membrane separator for concentration to a higher concentration; the helium content in the non-permeation gas of the three-stage membrane separator is extremely low, and the gas returns to a pipe network after being pressurized by a compressor; the helium concentration of the permeation gas outlet of the second-stage first-stage membrane separator is higher, and pure helium is produced after the helium is pressurized by a crude helium compressor and enters a fine dehydrogenation system and a pressure swing adsorption unit; the non-permeation gas outlet of the second-stage first-stage membrane separator still contains a large amount of helium, and the helium enters the second-stage membrane separator to be recovered and returns to the crude helium compressor for circulation; the helium content in the non-permeation outlet of the second-stage membrane separator is still far higher than that of the original natural gas, and the helium returns to the third-stage membrane separator for recycling; the helium content in the desorption gas of the pressure swing adsorption unit is very high but the pressure is lower, the desorption gas returns to the outlet of the first-stage membrane separator for circulation, and the product gas of the pressure swing adsorption unit is purified high-purity helium.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.
Claims (7)
1. A normal temperature natural gas helium extraction and purification system is characterized by comprising a primary membrane separator (1), a secondary first-stage membrane separator (7), a secondary second-stage membrane separator (8) and a pressure swing adsorption unit (11);
the permeation gas outlet of the first-stage membrane separator (1) is connected with the compressor (2) and then is connected with the inlet of the second-stage first-stage membrane separator (7); the non-permeable gas outlet of the primary membrane separator (1) is connected with a pipe network to continuously convey natural gas outwards;
the permeation gas outlet of the second-stage first-stage membrane separator (7) is connected with the compressor (2) and then connected with the pressure swing adsorption unit (6) to obtain high-purity helium;
the non-permeate gas outlet of the second-stage first-stage membrane separator (7) is connected with the inlet of the second-stage membrane separator (8);
the permeation gas outlet of the second-stage membrane separator (8) is connected with the compressor (2) and then connected with the second-stage first-stage membrane separator (7);
and a non-permeable gas outlet of the second-stage two-section membrane separator (8) is connected to a pipe network to continuously convey natural gas outwards.
2. The extraction and purification system for helium from natural gas at normal temperature as claimed in claim 1, wherein the permeation gas outlet of the primary membrane separator (1) is connected with the compressor (2), then connected with the dehydrogenation unit (3) and the decarburization unit (4) for rough treatment, and then connected with the inlet of the secondary primary membrane separator (7).
3. The normal-temperature natural gas and helium extraction and purification system as claimed in claim 2, wherein a permeation gas outlet of the second-stage first-stage membrane separator (7) is connected with the compressor (2), then connected with the dehydrogenation unit (3) for fine treatment, and then connected with the pressure swing adsorption unit (6).
4. The normal-temperature natural gas helium extraction and purification system as claimed in claim 1, wherein a permeate gas outlet of the primary membrane separator (1) is connected with a compressor (2) and then is connected with an inlet of a tertiary membrane separator (5), and a permeate gas outlet of the tertiary membrane separator (5) is connected with an inlet of a secondary primary membrane separator (7) after being connected with the compressor (2); and a non-permeable gas outlet of the three-stage membrane separator (5) is connected with the compressor (2) and then is connected into a pipe network to continuously convey natural gas outwards.
5. An ambient temperature natural gas helium extraction and purification system as claimed in claim 2, wherein the desorbed gas outlet of the decarbonization unit (4) is connected to a pipeline network to continue to convey natural gas outwards.
6. A normal temperature natural gas helium extraction and purification system as claimed in claim 4, wherein the non-permeation gas outlet of the secondary two-stage membrane separator (8) is connected with the inlet of the tertiary membrane separator (5).
7. A normal temperature natural gas helium extraction and purification system as claimed in claim 1, wherein the desorbed gas outlet of the pressure swing adsorption unit (6) is connected with the outlet of the primary membrane separator (1) for circulation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411859613.0A CN119607813A (en) | 2020-11-25 | 2020-11-25 | Normal-temperature natural gas helium extraction and purification system and purification method thereof |
| CN202011334368.3A CN112408342A (en) | 2020-11-25 | 2020-11-25 | Normal temperature natural gas helium extraction and purification system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011334368.3A CN112408342A (en) | 2020-11-25 | 2020-11-25 | Normal temperature natural gas helium extraction and purification system |
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| CN202411859613.0A Division CN119607813A (en) | 2020-11-25 | 2020-11-25 | Normal-temperature natural gas helium extraction and purification system and purification method thereof |
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| CN112408342A true CN112408342A (en) | 2021-02-26 |
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| CN202411859613.0A Pending CN119607813A (en) | 2020-11-25 | 2020-11-25 | Normal-temperature natural gas helium extraction and purification system and purification method thereof |
| CN202011334368.3A Pending CN112408342A (en) | 2020-11-25 | 2020-11-25 | Normal temperature natural gas helium extraction and purification system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113501508A (en) * | 2021-07-08 | 2021-10-15 | 北京中科富海低温科技有限公司 | System and method for extracting helium from natural gas or BOG |
| CN115849315A (en) * | 2022-12-28 | 2023-03-28 | 陕西燃气集团富平能源科技有限公司 | Helium gas separation and purification system |
Citations (4)
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|---|---|---|---|---|
| CN111348630A (en) * | 2017-12-31 | 2020-06-30 | 液体空气先进技术美国有限责任公司 | Recovery of helium from natural gas |
| CN111715028A (en) * | 2020-06-24 | 2020-09-29 | 大连理工大学 | A high-yield separation and purification coupling process of helium with diversified products |
| CN111770784A (en) * | 2018-01-22 | 2020-10-13 | 林德有限责任公司 | Method and system for extracting pure helium |
| CN214087729U (en) * | 2020-11-25 | 2021-08-31 | 天邦膜技术国家工程研究中心有限责任公司 | Normal temperature natural gas helium extraction and purification system |
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2020
- 2020-11-25 CN CN202411859613.0A patent/CN119607813A/en active Pending
- 2020-11-25 CN CN202011334368.3A patent/CN112408342A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348630A (en) * | 2017-12-31 | 2020-06-30 | 液体空气先进技术美国有限责任公司 | Recovery of helium from natural gas |
| CN111770784A (en) * | 2018-01-22 | 2020-10-13 | 林德有限责任公司 | Method and system for extracting pure helium |
| CN111715028A (en) * | 2020-06-24 | 2020-09-29 | 大连理工大学 | A high-yield separation and purification coupling process of helium with diversified products |
| CN214087729U (en) * | 2020-11-25 | 2021-08-31 | 天邦膜技术国家工程研究中心有限责任公司 | Normal temperature natural gas helium extraction and purification system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113501508A (en) * | 2021-07-08 | 2021-10-15 | 北京中科富海低温科技有限公司 | System and method for extracting helium from natural gas or BOG |
| CN115849315A (en) * | 2022-12-28 | 2023-03-28 | 陕西燃气集团富平能源科技有限公司 | Helium gas separation and purification system |
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| CN119607813A (en) | 2025-03-14 |
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Inventor after: Luo Zongmin Inventor after: Xu Changyang Inventor after: Chu Peng Inventor before: Luo Zongmin Inventor before: Xu Changyang |
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Effective date of registration: 20230327 Address after: No.28 Huoju Road, Qixianling high tech Industrial Park, Dalian, Liaoning, 116023 Applicant after: TIANBANG NATIONAL ENGINEERING RESEARCH CENTER OF MEMBRANE TECHNOLOGY Co.,Ltd. Applicant after: Tianyi Technology (Dalian) Co.,Ltd. Address before: No.28 Huoju Road, Qixianling, Dalian hi tech Industrial Park, Liaoning 116000 Applicant before: TIANBANG NATIONAL ENGINEERING RESEARCH CENTER OF MEMBRANE TECHNOLOGY Co.,Ltd. |