Purifying device for purifying high-purity argon by adopting ordinary argon

Abstract

The utility model relates to a purification device for purifying high-purity argon by adopting common argon, which comprises a raw material crude liquid argon pipeline, a first main heat exchanger, a deoxidizing tower, a high-purity argon tower, a second main heat exchanger, a liquid argon subcooler, a high-purity liquid argon storage tank and a nitrogen circulating system, the top of the deoxygenization tower is output to the high-purity argon tower, a high-purity liquid argon pipeline is arranged at the bottom of the high-purity argon tower in a pumping mode, the high-purity liquid argon is directly fed into a high-purity liquid argon storage tank after being supercooled by a liquid argon supercooler, a deoxygenization evaporator is arranged at the bottom of the deoxygenization tower, a nitrogen removal evaporator is arranged at the bottom of the high-purity argon tower, and heat sources of the deoxygenization evaporator and the nitrogen removal evaporator adopt a nitrogen circulation system. The whole structure is relatively simple in composition, good in working stability, simple in operation process and good in purification effect, heat exchange is synchronously carried out on a plurality of pipelines, the efficiency of heat exchange work is improved, effective utilization of a source is guaranteed, energy consumption is reduced, a nitrogen circulating system can fully provide a heat source, and the evaporation and precipitation effect is good.

Description

Technical Field

[0001] This utility model relates to the technical field of high-purity argon purification equipment, specifically to a purification equipment that uses ordinary argon to purify high-purity argon. Background Technology

[0002] Currently, the market demand for high-purity argon is gradually increasing, especially in photovoltaic, lighting, stainless steel production, stainless steel processing, and other emerging industries. The improved performance of the photovoltaic industry is expected to drive an increase in argon consumption across the entire industry. However, the high-purity argon supplied by our air separation unit cannot meet market demand, and the argon products we purchase are mainly ordinary argon, resulting in insufficient market supply. Therefore, how to design an ordinary argon re-distillation purification unit with good stability, simple operation, and good purification effect has become a problem we need to solve. Hence, our company has launched the research and development of ordinary argon purification technology in response to this situation. Utility Model Content

[0003] The purpose of this invention is to provide a purification device that uses ordinary argon to purify high-purity argon in order to solve the above problems, meet market demand, and has the characteristics of good stability, simple operation process and good purification effect.

[0004] This utility model achieves the above-mentioned objective through the following technical solution: a purification device for purifying high-purity argon using ordinary argon, comprising a raw material crude liquid argon pipeline, a first main heat exchanger, a deoxygenation tower, a high-purity argon tower, a second main heat exchanger, a liquid argon subcooler, a high-purity liquid argon storage tank, and a nitrogen circulation system. The raw material crude liquid argon pipeline enters the middle of the deoxygenation tower after passing through the first main heat exchanger. The top of the deoxygenation tower outputs to the high-purity argon tower. A high-purity liquid argon pipeline is drawn from the bottom of the high-purity argon tower, and after being subcooled by the liquid argon subcooler, it is directly sent to the high-purity liquid argon storage tank. A deoxygenation evaporator is installed at the bottom of the deoxygenation tower, and a denitrification evaporator is installed at the bottom of the high-purity argon tower. The heat source for the deoxygenation evaporator and the denitrification evaporator is a nitrogen circulation system.

[0005] As a preferred embodiment of this invention, a liquid pump is installed on the crude argon pipeline for the raw material.

[0006] As a preferred embodiment of this invention, the bottom of the deaerator is provided with a liquid oxygen pipeline, and the liquid oxygen pipeline is connected to a liquid oxygen storage tank.

[0007] As a preferred embodiment of this utility model, the deoxygenation tower is provided with a top output pipeline I, the high-purity argon tower is provided with a top output pipeline II, the top output pipeline I and the top output pipeline II are connected in parallel to provide a room temperature nitrogen pipeline, and the room temperature nitrogen pipeline is connected to the nitrogen circulation system after passing through the second main heat exchanger and the first main heat exchanger.

[0008] As a preferred embodiment of this invention, a temperature detection element I and a pressure display element I are provided on the pipeline from the top of the deoxygenation tower to the high-purity argon tower.

[0009] In a preferred embodiment of this invention, the top of the deoxygenation tower is provided with a deoxygenation condenser, the top of the high-purity argon tower is provided with a denitrification condenser, the deoxygenation condenser and the interior of the deoxygenation tower form a circulation path I, and the denitrification condenser and the interior of the high-purity argon tower form a circulation path II.

[0010] In a preferred embodiment of this invention, the nitrogen circulation system includes a nitrogen replenishment pipeline and a nitrogen circulation compressor. The nitrogen replenishment pipeline, after being pressurized by the nitrogen circulation compressor, is connected to an oxygen deoxygenator input pipeline and a nitrogen denitrification evaporator input pipeline. The oxygen deoxygenator input pipeline reaches the oxygen deoxygenator after passing through a first main heat exchanger, and the nitrogen denitrification evaporator input pipeline reaches the nitrogen denitrification evaporator after passing through a second main heat exchanger. The output of the oxygen deoxygenator, after passing through the second main heat exchanger, is connected to the top of the oxygen deoxygenator tower via cold source pipelines I and II. The output of the nitrogen denitrification evaporator, after passing through a liquid argon subcooler and the second main heat exchanger, is connected to the top of the high-purity argon tower via cold source pipeline III. Cold source pipeline II is connected in parallel to cold source pipeline III.

[0011] In a preferred embodiment of this invention, the deaerator input pipe is provided with a pressure display element II and a temperature detection element II, the denitrifier input pipe is provided with a pressure display element III and a temperature detection element III, the denitrifier is connected to a replenishing liquid nitrogen pipe, the replenishing liquid nitrogen pipe is provided with a branch pipe, the branch pipe is connected to the cold source pipe I, the cold source pipe II and the cold source pipe III are connected in parallel and then input to the replenishing liquid nitrogen pipe, and the replenishing liquid nitrogen pipe is provided with a pressure display element IV.

[0012] The beneficial effects of this utility model are as follows: First, the crude liquid argon from the raw material crude liquid argon pipeline is pressurized and enters the first main heat exchanger, then directly enters the middle of the deoxygenation tower. In the deoxygenation tower, high-boiling-point oxygen components are removed through preliminary distillation. Then, oxygen-free gaseous argon is extracted from the top of the deoxygenation tower and sent to the high-purity argon tower for further removal of low-boiling-point nitrogen components. Finally, high-purity liquid argon is extracted from the bottom of the high-purity argon tower through the high-purity liquid argon pipeline, and after being subcooled by the liquid argon subcooler, it is directly sent to the high-purity liquid argon storage tank. The entire structure is relatively simple, has good stability during operation, is easy to operate, and has a good purification effect. Secondly, the setting of the first and second main heat exchangers allows for simultaneous heat exchange in multiple pipelines, further improving the efficiency of heat exchange, ensuring effective energy utilization, and reducing energy consumption. Furthermore, the nitrogen circulation system can fully provide the heat source for the deoxygenation evaporator and the denitrification evaporator, resulting in better evaporation and precipitation effects, and the ability to be recycled and reused greatly reduces energy consumption. Attached Figure Description

[0013] Figure 1 This is a schematic diagram illustrating the principle of this utility model;

[0014] In the diagram: 1. Raw material crude liquid argon pipeline; 2. First main heat exchanger; 3. Deoxygenation tower; 4. High-purity argon tower; 5. Second main heat exchanger; 6. Liquid argon subcooler; 7. High-purity liquid argon storage tank; 8. High-purity liquid argon pipeline; 9. Deoxygenation evaporator; 10. Denitrification evaporator; 11. Liquid oxygen pipeline; 12. Liquid oxygen storage tank; 13. Top output pipeline I; 14. Top output pipeline II; 15. Ambient temperature nitrogen pipeline; 16. Temperature detection element I; 17. Pressure display element I; 18. Deoxygenation condenser; 19. Denitrification condenser 20. Circulation circuit I; 21. Circulation circuit II; 22. Nitrogen replenishment line; 23. Nitrogen circulation compressor; 24. Deoxygenated evaporator input line; 25. Denitrified evaporator input line; 26. Cold source line I; 27. Cold source line II; 28. Cold source line III; 29. ​​Pressure display element II; 30. Temperature detection element II; 31. Pressure display element III; 32. Temperature detection element III; 33. Liquid nitrogen replenishment line; 34. Branch line; 35. Pressure display element IV. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 As shown, a purification device for purifying high-purity argon using ordinary argon includes a raw material crude liquid argon pipeline 1, a first main heat exchanger 2, a deoxygenation tower 3, a high-purity argon tower 4, a second main heat exchanger 5, a liquid argon subcooler 6, a high-purity liquid argon storage tank 7, and a nitrogen circulation system. The raw material crude liquid argon pipeline 1 enters the middle of the deoxygenation tower 3 after passing through the first main heat exchanger 2. The top of the deoxygenation tower 3 outputs to the high-purity argon tower 4. A high-purity liquid argon pipeline 8 is drawn from the bottom of the high-purity argon tower 4 and sent directly to the high-purity liquid argon storage tank 7 after being subcooled by the liquid argon subcooler 6. A deoxygenation evaporator 9 is installed at the bottom of the deoxygenation tower 3, and a denitrification evaporator 10 is installed at the bottom of the high-purity argon tower 4. The heat source for the deoxygenation evaporator 9 and the denitrification evaporator 10 is a nitrogen circulation system.

[0017] In this embodiment, the crude liquid argon from the raw material crude liquid argon pipeline 1 is pressurized and enters the first main heat exchanger 2, then directly enters the middle of the deoxygenation tower 3. In the deoxygenation tower 3, high-boiling-point oxygen components are removed through preliminary distillation. Then, oxygen-free gaseous argon is extracted from the top of the deoxygenation tower 3 and sent to the high-purity argon tower 4 for further removal of low-boiling-point nitrogen components. Finally, high-purity liquid argon is extracted from the bottom of the high-purity argon tower 4 through the high-purity liquid argon pipeline 8, and after being subcooled by the liquid argon subcooler 6, it exits the tower and is directly sent to the high-purity argon tower. The liquid argon storage tank 7 has a relatively simple structure, good stability during operation, simple operation process, and good purification effect. Secondly, through the setting of the first main heat exchanger 2 and the second main heat exchanger 5, heat exchange is carried out simultaneously on multiple pipelines, which further improves the efficiency of heat exchange work, ensures the effective use of energy, and reduces energy consumption. Furthermore, the nitrogen circulation system can fully provide the heat source for the deoxygenated evaporator 9 and the denitrified evaporator 10, resulting in better evaporation and precipitation effect, and can be recycled and reused, greatly reducing energy consumption.

[0018] Specifically, the liquid argon subcooler 6 improves refrigeration efficiency: by lowering the temperature of the refrigerant liquid, it reduces flash vapor generated during or after throttling, thereby appropriately improving refrigeration efficiency. In the refrigeration system, the subcooler can reduce the vaporization loss of low-temperature liquid caused by pipeline cooling losses and flow resistance, preventing cavitation. The liquid argon subcooler 6 becomes an important component for improving the performance and reliability of the refrigeration system. The high-purity liquid argon storage tank 7 is used to store high-purity liquid argon for the product.

[0019] As a technical optimization of this utility model, a liquid pump is installed on the raw material crude liquid argon pipeline 1.

[0020] In this embodiment, the liquid pump can pressurize and transport the raw crude liquid argon in the raw material crude liquid argon pipeline 1, thereby improving working efficiency and achieving better results.

[0021] As a technical optimization of this utility model, the bottom of the deaerator 3 is provided with a liquid oxygen pipeline 11, and the liquid oxygen pipeline 11 is connected to a liquid oxygen storage tank 12.

[0022] In this embodiment, the deoxygenation tower 3 can output liquid oxygen through the liquid oxygen pipeline 11 and store it in the liquid oxygen storage tank 12.

[0023] As a technical optimization of this utility model, the deoxygenation tower 3 is provided with a top output pipeline I13, the high-purity argon tower 4 is provided with a top output pipeline II14, and the top output pipeline I13 and the top output pipeline II14 are connected in parallel to output a normal temperature nitrogen pipeline 15. The normal temperature nitrogen pipeline 15 is connected to the nitrogen circulation system after passing through the second main heat exchanger 5 and the first main heat exchanger 2.

[0024] In this embodiment, the nitrogen produced by the deoxygenation tower 3 is output through the top output pipeline I13, and the nitrogen produced by the high-purity argon tower 4 is output through the top output pipeline II25. Both are then circulated into the nitrogen circulation system via the ambient temperature nitrogen pipeline 15, thus achieving recycling.

[0025] As a technical optimization of this utility model, a temperature detection element I16 and a pressure display element I17 are installed on the pipeline from the top of the deoxygenation tower 3 to the high-purity argon tower 4.

[0026] In this embodiment, the temperature of the pipeline from the top of the deoxygenation tower 3 to the high-purity argon tower 4 can be detected by the temperature detection element I16, and the pressure of the pipeline from the top of the deoxygenation tower 3 to the high-purity argon tower 4 can be clearly known by the pressure display element I17.

[0027] As a technical optimization of this utility model, a deoxygenation condenser 18 is provided at the top of the deoxygenation tower 3, and a denitrification condenser 19 is provided at the top of the high-purity argon tower 4. A circulation path I20 is formed between the deoxygenation condenser 18 and the interior of the deoxygenation tower 3, and a circulation path II21 is formed between the denitrification condenser 19 and the interior of the high-purity argon tower 4.

[0028] In this embodiment, the deaerator condenser 18 and the denitrifier condenser 19 are used for heat exchange. The circulation path I20 and circulation path II21 protect the deaerator condenser 18 and the denitrifier condenser 19, ensuring that the water temperature inside the condenser is kept in a relatively stable state, avoiding vaporization overpressure problems caused by excessively high water temperature, thereby protecting the safe operation of the condenser.

[0029] As a technical optimization of this utility model, the nitrogen circulation system includes a nitrogen replenishment pipeline 22 and a nitrogen circulation compressor 23. After being pressurized by the nitrogen circulation compressor 23, the nitrogen replenishment pipeline 22 is connected to a deoxygenated evaporator input pipeline 24 and a denitrified evaporator input pipeline 25. The deoxygenated evaporator input pipeline 24 reaches the deoxygenated evaporator 9 after passing through the first main heat exchanger 2. The denitrified evaporator input pipeline 25 reaches the denitrified evaporator 10 after passing through the second main heat exchanger 5. The output of the deoxygenated evaporator 9 is connected to the top of the deoxygenated tower 3 via a cold source pipeline I26 and a cold source pipeline II27 after passing through the second main heat exchanger 5. The output of the denitrified evaporator 10 reaches the top of the high-purity argon tower 4 via a cold source pipeline III28 after passing through a liquid argon subcooler 19 and the second main heat exchanger 5. The cold source pipeline II27 is connected in parallel to the cold source pipeline III28.

[0030] In this embodiment, the heat source for the bottom evaporators of the deoxygenation tower 3 and the high-purity argon tower 4 is a nitrogen circulation system. The nitrogen from the nitrogen supply pipeline 22 is pressurized by the nitrogen circulation compressor 23 and enters the first main heat exchanger 2. After exchanging heat with the backflowing low-temperature nitrogen and part of the backflowing waste gas in the first main heat exchanger 2, the nitrogen enters the deoxygenation evaporator 9 and the denitrification evaporator 10 respectively. After heat exchange in the evaporator, the oxygen and nitrogen are liquefied. The liquefied liquid nitrogen is then sent to the deoxygenation tower condenser 18 and the denitrification condenser 19 as a cold source. The vaporized nitrogen returns to the first main heat exchanger 2 for reheating and is then sent out back to the inlet of the nitrogen circulation compressor 23, thus achieving circulation.

[0031] As a technical optimization of this utility model, a pressure display element II29 and a temperature detection element II30 are provided on the input pipe 24 of the deaerator evaporator, a pressure display element III31 and a temperature detection element III32 are provided on the input pipe of the denitrifier evaporator 10, a replenishing liquid nitrogen pipe 33 is connected to the denitrifier evaporator 10, the replenishing liquid nitrogen pipe 33 is provided with a branch pipe 34, the branch pipe 34 is connected to the cold source pipe I26, the cold source pipe II27 and the cold source pipe III28 are connected in parallel and input to the replenishing liquid nitrogen pipe 33, and a pressure display element IV35 is provided on the replenishing liquid nitrogen pipe 33.

[0032] In this embodiment, the temperature of the deoxygenated evaporator input pipe 24 can be detected by temperature detection element II30, and the pressure of the deoxygenated evaporator input pipe 24 can be clearly known by pressure display element II29. The temperature of the denitrified evaporator input pipe 25 can be detected by temperature detection element III32, and the pressure of the denitrified evaporator input pipe 25 can be clearly known by pressure display element III31. The denitrified evaporator 10 is connected to a replenishing liquid nitrogen pipe 33, which has a branch pipe 34. The branch pipe 34 is connected to the cold source pipe I26. The cold source pipe II27 and the cold source pipe III28 are connected in parallel and then fed into the replenishing liquid nitrogen pipe 33 to achieve circulation. The pressure display element IV35 can detect the pressure of the replenishing liquid nitrogen pipe 33.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A purification apparatus for purifying high-purity argon using ordinary argon, characterized in that: Including raw material crude liquid argon pipeline (1), first main heat exchanger (2), oxygen removal tower (3), high purity argon tower (4), second main heat exchanger (5), liquid argon supercooler (6), high purity liquid argon storage tank (7) and nitrogen gas circulation system, the raw material crude liquid argon pipeline (1) is passed through the first main heat exchanger and enters the middle part of the oxygen removal tower (3), the top of the oxygen removal tower (3) is output to the high purity argon tower (4), the bottom of the high purity argon tower (4) is provided with high purity liquid argon pipeline (8), which is cooled by liquid argon supercooler (6) and directly sent to high purity liquid argon storage tank (7), the bottom of the oxygen removal tower (3) is provided with oxygen removal evaporator (9), the bottom of the high purity argon tower (4) is provided with nitrogen removal evaporator (10), the heat source of the oxygen removal evaporator (9) and the nitrogen removal evaporator (10) adopts nitrogen gas circulation system.

2. The purification device for purifying high-purity argon by using praseodymium according to claim 1, characterized in that: The raw material crude liquid argon pipeline (1) is provided with a liquid pump.

3. The purification device for purifying high-purity argon by using praseodymium according to claim 1, characterized in that: The bottom of the oxygen removal tower (3) is provided with a liquid oxygen pipeline (11), and the liquid oxygen pipeline (11) is connected to a liquid oxygen storage tank (12).

4. The purification device for purifying high-purity argon by using praseodymium according to claim 1, characterized in that: The oxygen removal tower (3) is provided with a top output pipeline I (13), the high purity argon tower (4) is provided with a top output pipeline II (14), the top output pipeline I (13) and the top output pipeline II (14) are connected in parallel to be provided with a normal temperature nitrogen gas pipeline (15), and the normal temperature nitrogen gas pipeline (15) is connected to the nitrogen gas circulation system after passing through the second main heat exchanger (5) and the first main heat exchanger (2).

5. The purification device for purifying high-purity argon by using praseodymium according to claim 1, characterized in that: The pipeline, which outputs the top of the oxygen removal tower (3) to the high purity argon tower (4), is provided with a temperature detection element I (16) and a pressure display element I (17).

6. The purification device for purifying high-purity argon by using praseodymium according to claim 1, characterized in that: The top of the oxygen removal tower (3) is provided with an oxygen removal condenser (18), and the top of the high purity argon tower (4) is provided with a nitrogen removal condenser (19), the oxygen removal condenser (18) and the inside of the oxygen removal tower (3) are provided with a circulation path I (20), and the nitrogen removal condenser (19) and the inside of the high purity argon tower (4) are provided with a circulation path II (21).

7. The purification device for purifying high-purity argon by using praseodymium according to claim 1, characterized in that: The nitrogen gas circulation system comprises a supplementary nitrogen gas pipeline (22) and a nitrogen gas circulation compressor (23), the supplementary nitrogen gas pipeline (22) is pressurized by the nitrogen gas circulation compressor (23) and is provided with an oxygen removal evaporator input pipeline (24) and a nitrogen removal evaporator input pipeline (25), the oxygen removal evaporator input pipeline (24) reaches the oxygen removal evaporator (9) after passing through the first main heat exchanger (2), the nitrogen removal evaporator input pipeline (25) reaches the nitrogen removal evaporator (10) after passing through the second main heat exchanger (5), the output of the oxygen removal evaporator (9) is provided with a cold source pipeline I (26) and a cold source pipeline II (27) connected to the top of the oxygen removal tower (3) after passing through the second main heat exchanger (5), the output of the nitrogen removal evaporator (10) is provided with a cold source pipeline III (28) reaching the top of the high purity argon tower (4) after passing through the liquid argon supercooler (6) and the second main heat exchanger (5), and the cold source pipeline II (27) is connected to the cold source pipeline III (28).

8. The purification device for purifying high-purity argon by using praseodymium according to claim 7, characterized in that: The oxygen removal evaporator input pipeline (24) is provided with a pressure display element II (29) and a temperature detection element II (30), the nitrogen removal evaporator input pipeline (25) is provided with a pressure display element III (31) and a temperature detection element III (32), the nitrogen removal evaporator (10) is connected to a supplementary liquid nitrogen pipeline (33), the supplementary liquid nitrogen pipeline (33) is provided with a branch pipeline (34), the branch pipeline (34) is connected to the cold source pipeline I (26), the cold source pipeline II (27) and the cold source pipeline III (28) are connected and then input to the supplementary liquid nitrogen pipeline (33), and the supplementary liquid nitrogen pipeline (33) is provided with a pressure display element IV (35).

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