Air separation argon generation system

Abstract

The utility model provides a kind of air separation argon production system.In air separation argon production system, true argon tower system receives first argon-containing stream from the rectifying tower system of first air separation plant.The false argon tower system receives second argon-containing stream from the rectifying tower system of second air separation plant.The false argon tower system is set to rectify second argon-containing stream into argon-rich stream.The pipeline system is set to lead argon-rich stream of the false argon tower system to the true argon tower system.The true argon tower system is set to rectify both first argon-containing stream and argon-rich stream to obtain crude argon stream.The number of trays of the true argon tower body of the true argon tower system is more than the number of trays of the false argon tower body of the false argon tower system, and the barrel diameter of the tower barrel of the true argon tower body is greater than the barrel diameter of the tower barrel of the false argon tower body.The above-mentioned air separation argon production system is suitable for factories with multiple sets of air separation equipment.

Description

Technical Field

[0001] This utility model belongs to the field of air separation and relates to an air separation argon production system. Background Technology

[0002] With industrial development, the demand for argon is increasing, especially in the electronics industry. Argon is also very expensive. Many factories that originally only had air separation equipment for producing oxygen and / or nitrogen are looking to upgrade their existing facilities to produce argon.

[0003] In particular, for factories with multiple air separation units, the investment is substantial if each unit requires a crude argon column and a pure argon column to produce pure argon. In fact, the drawbacks of this approach are the same even for new factories that need to be equipped with multiple air separation units.

[0004] Therefore, we hope to provide a solution for situations involving multiple air separation units that can significantly reduce investment costs. Utility Model Content

[0005] The purpose of this invention is to provide an air separation argon production system that is applicable to factories with multiple air separation units.

[0006] This invention provides an air separation argon production system. The air separation argon production system includes a true argon column system, a dummy argon column system, and a piping system. The true argon column system receives a first argon-containing stream from the rectification column system of a first air separation unit. The dummy argon column system receives a second argon-containing stream from the rectification column system of a second air separation unit (different from the first air separation unit). The dummy argon column system is configured to rectify the second argon-containing stream into an argon-rich stream. The piping system is configured to guide the argon-rich stream from the dummy argon column system to the true argon column system. The true argon column system is configured to rectify both the first argon-containing stream and the argon-rich stream to obtain a crude argon stream. The true argon column system has more trays than the dummy argon column system, and the diameter of the true argon column is larger than the diameter of the dummy argon column.

[0007] In one embodiment, the air separation argon production system includes multiple dummy argon tower systems. Each of the multiple dummy argon tower systems receives a second argon-containing stream from multiple second air separation units, wherein the multiple dummy argon tower systems are configured identically. The air separation argon production system also includes only one true argon tower system.

[0008] In one embodiment, the dummy argon column system includes a dummy argon condenser and a dummy argon column body. The piping system is configured such that a second oxygen-enriched stream from the distillation column system of the second air separation unit flows into the dummy argon condenser, exchanges heat with a second argon-enriched stream exiting from the top of the dummy argon column body, thereby evaporating into a second oxygen-enriched stream, which returns to the distillation column system of the second air separation unit. The true argon column system includes a true argon condenser and a true argon column body. The piping system is configured such that a first oxygen-enriched stream from the distillation column system of the first air separation unit flows into the true argon condenser, exchanges heat with a first argon-enriched stream exiting from the top of the true argon column body, thereby evaporating into a first oxygen-enriched stream, which returns to the distillation column system of the first air separation unit.

[0009] In one embodiment, the piping system is configured such that a first argon-containing stream and an argon-rich stream enter the argon column body of the argon column system. Specifically, the first argon-containing stream and the argon-rich stream enter the argon column body from the bottom and middle positions, respectively.

[0010] In one embodiment, the piping system is configured such that the second argon-rich stream condenses into a second argon-rich liquid by exchanging heat with the second oxygen-rich stream in a dummy argon condenser. A portion of the second argon-rich liquid is introduced into the true argon tower system as an argon-rich stream, while another portion returns to the dummy argon tower.

[0011] In one embodiment, both the first and second air separation units include a high-pressure column and a low-pressure column with relatively high and low operating pressures, respectively. The piping system is configured such that a first argon-containing stream is directly introduced from the outlet position of the low-pressure column of the first air separation unit to the bottom of the vacuum argon column; a first oxygen-enriched stream returns from the vacuum argon condenser to the return position of the low-pressure column of the first air separation unit; liquid accumulated at the bottom of the vacuum argon column is pumped back to the guide position of the low-pressure column of the first air separation unit; and a first oxygen-enriched stream is introduced from the bottom of the high-pressure column of the first air separation unit into the vacuum argon condenser. The guide position, outlet position, and return position of the low-pressure column of the first air separation unit are all intermediate positions, and the guide position and outlet position of the low-pressure column are at approximately the same height, while the return position is higher than the outlet position. The piping system is configured such that the second argon-containing stream is directly introduced from the outlet position of the low-pressure tower of the second air separation unit to the bottom of the dummy argon tower; the second oxygen-enriched stream returns from the dummy argon condenser to the return position of the low-pressure tower of the second air separation unit; the liquid accumulated at the bottom of the dummy argon tower is directly returned to the guide position of the low-pressure tower of the second air separation unit; and the second oxygen-enriched stream is introduced from the bottom of the high-pressure tower of the second air separation unit into the dummy argon condenser. The guide, outlet, and return positions of the low-pressure tower of the second air separation unit are all intermediate positions, and the guide and outlet positions of the low-pressure tower are at roughly the same height, while the return position is higher than the outlet position.

[0012] In one embodiment, the air separation argon production system is arranged such that the outlet position of the first argon-rich stream from the distillation column system of the first air separation unit is higher than the inlet position of the first argon-rich stream entering the true argon column system, thereby allowing the first argon-rich stream to flow directly from the first air separation unit into the true argon column system using the head difference. The piping system is configured to pump the argon-rich stream to the true argon column system via a transfer pump.

[0013] In one embodiment, the number of trays in the true argon tower system is at least three times the number of trays in the dummy argon tower system, and the diameter of the true argon tower is at least three percent larger than the diameter of the dummy argon tower.

[0014] In one embodiment, the air separation argon production system further includes a argon refining column. The argon refining column is configured to receive a crude argon stream from a true argon column system and further distill it to obtain a refined argon stream.

[0015] In one embodiment, the piping system is provided with a reserved interface, which is configured to be openable and closable for external pipeline connection.

[0016] In the aforementioned air separation argon production system, a smaller dummy argon column system is used for the second air separation unit, while a larger true argon column system is used for the first air separation unit. The argon-rich stream from the dummy argon column system and the argon-containing stream from the first air separation unit are both collected in the true argon column system for centralized distillation, thus obtaining a crude argon stream enriched with argon fractions. This significantly reduces costs, such as manufacturing and subsequent maintenance costs, compared to setting up separate argon columns for each air separation unit, while increasing distillation efficiency. Therefore, this air separation argon production system is particularly suitable for plants with multiple air separation units. Whether for retrofitting or building new facilities, it can significantly reduce costs and improve efficiency. Attached Figure Description

[0017] The advantages and spirit of this utility model can be further understood through the following detailed description and accompanying drawings.

[0018] Figure 1 This is a schematic diagram illustrating the construction of an air separation argon production system. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, it should be understood that this utility model is not limited to the embodiments described below, and the technical concept of this utility model can be implemented in combination with other known technologies or functions, or with other technologies that are the same as those known technologies.

[0020] For example, if the first feature described subsequently in the specification is formed above or on the second feature, this can include embodiments where the first and second features are formed by direct connection, or embodiments where an additional feature is formed between the first and second features, so that the first and second features are not directly connected. Furthermore, when the first element is described in a manner connected or combined with the second element, the description includes embodiments where the first and second elements are directly connected or combined with each other, as well as embodiments where one or more other intervening elements are incorporated to indirectly connect or combine the first and second elements with each other.

[0021] The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. Unless otherwise stated, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood in the art to which this invention pertains. It should also be understood that terms, such as those defined in common dictionaries, should be understood to have the same meaning as they have in the context of this specification and the related art, and should not be interpreted in an idealized or overly formal sense unless expressly stated herein. For the sake of brevity and / or clarity, well-known functions or constructions may not be described in detail.

[0022] Figure 1 An exemplary air separation argon production system 30 according to an embodiment of the present invention is shown. The air separation argon production system 30 includes a real argon tower system 3, a dummy argon tower system 4, and a piping system 5. It is understood that the accompanying drawings are for illustrative purposes only and are not necessarily drawn to scale, and should not be construed as limiting the scope of protection of the present invention.

[0023] The true argon column system 3 receives a first argon-containing stream a1 from the distillation column system 100 of the first air separation unit 10, and the dummy argon column system 4 receives a second argon-containing stream a2 from the distillation column system 200 of the second air separation unit 20, which is different from the first air separation unit 10.

[0024] It is understood that the terms "first" and "second" are used for descriptive purposes only and do not refer to a limitation on time sequence, quantity, or importance. They should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated, but are merely used to distinguish one technical feature from another in this technical solution. Therefore, a feature specified with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more (i.e., more than two), unless otherwise explicitly specified. Similarly, qualifiers such as "one" appearing in the text do not refer to a limitation on quantity, but rather describe technical features not previously mentioned. Likewise, unless a noun is modified by a specific quantifier, the text should be considered to include both singular and plural forms; the technical solution may include either a singular or plural number of that technical feature. Similarly, modifiers such as "approximately" or "about" preceding numerals in the text usually include the number itself, and their specific meaning should be understood in conjunction with the context. In addition, unless otherwise stated, descriptions such as "above", "below", "at least", and "at most" include the corresponding numerical value, while descriptions such as "higher than", "lower than", "more than", and "less than" do not include the corresponding numerical value.

[0025] The dummy argon tower system 4 is configured to distill the second argon-containing stream a2 into an argon-rich stream b2. The piping system 5 is configured to lead the argon-rich stream b2 from the dummy argon tower system 4 to the real argon tower system 3. The real argon tower system 3 is configured to distill both the first argon-containing stream a1 and the argon-rich stream b2 to obtain a crude argon stream c3.

[0026] In the true argon tower system 3, the number of trays in the true argon tower body 31 is greater than the number of trays in the false argon tower system 4, and the diameter of the true argon tower body 31 is greater than the diameter of the false argon tower body 41.

[0027] Figure 1 As can be seen, due to the larger number of trays, the real argon tower body 31 is significantly taller than the fake argon tower body 41; however, since the tower diameter is only slightly larger, the real argon tower body 31 is not significantly thicker than the fake argon tower body 41.

[0028] In the above air separation argon production system 30, the crude argon stream b2 obtained from the dummy argon column system 4 matched with the second air separation equipment 20 is collected into the real argon column system 3 matched with the first air separation equipment 10, so that the first argon-containing stream a1 and the argon-enriched stream b2 exiting from the first air separation equipment 10 can be rectified together through the real argon column system 3. By merely setting a larger number of trays and a larger cylinder diameter for the real argon column system 3, the streams containing argon fractions from the first air separation equipment 10 and the second air separation equipment 20 (as will be mentioned later, even a plurality of second air separation equipments 20) can be centrally processed, so as to obtain the crude argon stream c3 with enriched argon fractions. In this way, compared with the separate arrangement of an argon column for each air separation equipment for rectification, the cost, such as manufacturing cost and subsequent maintenance cost, can be significantly reduced, and the rectification efficiency is also improved.

[0029] For example, the real argon column system 3 may adopt the standard size of a crude argon column conventionally equipped in air separation equipment, while the dummy argon column system 4 adopts a reduced size.

[0030] It can be understood that when it is mentioned herein that the pipeline system 5 is configured to make the corresponding streams flow in a certain manner, it means that the pipeline system 5 includes corresponding pipelines, which are all shown in the figure by lines with arrows indicating the flow direction of the streams. To avoid making the description too lengthy, each line is not represented by a corresponding pipeline, but the lines with arrows in the figure can all be regarded as one or more pipe sections, or one or more pipelines as required. In addition, it can be understood that when the expressions such as "between", "after", "before", "upstream", "downstream" and similar expressions are used herein to describe the arrangement in the flow path, they all refer to the corresponding flow direction of the streams.

[0031] It can also be understood that the terms "pipeline", "pipe", "pipe section" and the like used herein all refer to lines for the flow of streams, and do not limit the physical form of the corresponding elements. Taking "pipeline" as an example, a pipeline may refer to a segment in a complete pipeline. The pipeline may also be a combination of a plurality of pipelines connected in sequence. The plurality of pipelines may be connected by pipe joints, or by other pipeline elements such as valves and the like. The space for the stream to pass through in the pipe joints or other pipeline elements may also be considered as a part of the pipeline.

[0032] Figure 1 Herein, the air separation argon production system 30 may include a plurality of dummy argon column systems 4, for example, three dummy argon column systems 4a, 4b, 4c as shown in the figure. For the specific structure of the dummy argon column system 4, reference may be made to, for example Figure 1The description is based on a dummy argon tower system 4a. Each of the aforementioned dummy argon tower systems 4 can receive a second argon-containing stream a2 from multiple second air separation units 20. The aforementioned dummy argon tower systems 4 can be configured identically. The air separation argon production system 30 can include only one true argon tower system 3. That is, for N sets of air separation units within the plant, N-1 smaller dummy argon tower systems 4 are equipped, while only one larger true argon tower system 3 is built, allowing these N sets of air separation units to share this single true argon tower system 3. This further reduces costs.

[0033] Figure 1 In this system, the dummy argon tower system 4 may include a dummy argon condenser 42 and a dummy argon tower body 41. The piping system 5 is configured such that the second oxygen-enriched stream y2 exiting from the distillation tower system 200 of the second air separation unit 20 flows into the dummy argon condenser 42, exchanges heat with the second oxygen-enriched stream x2 exiting from the top of the dummy argon tower body 41, thereby evaporating into a second oxygen-enriched stream g2, which returns to the distillation tower system 200 of the second air separation unit 20.

[0034] It is understandable that the descriptions of "oxygen-rich" and "argon-rich" in the text mean that the content of the corresponding components in the stream is higher than that of the corresponding components in the air under normal conditions after certain treatment.

[0035] Figure 1 In this system, the argon column system 3 may include an argon condenser 32 and an argon column body 31. The piping system 5 is configured such that a first oxygen-enriched stream y1 exiting the distillation column system 100 of the first air separation unit 10 flows into the argon condenser 32, exchanges heat with a first argon-enriched stream x1 exiting from the top of the argon column body 31, and thus evaporates into a first oxygen-enriched stream g1. The first oxygen-enriched stream g1 returns to the distillation column system 100 of the first air separation unit 10.

[0036] Both the true argon tower system 3 and the dummy argon tower system 4 receive argon-containing streams from the distillation tower systems of their respective air separation units, and their corresponding condensers use the oxygen-enriched streams from the distillation tower systems of their respective air separation units as a cold source, resulting in high argon distillation efficiency.

[0037] Figure 1 In the pipeline system 5, the first argon-containing flow a1 and the argon-rich flow b2 can enter the true argon tower body 31 of the true argon tower system 3, wherein the first argon-containing flow a1 and the argon-rich flow b2 enter the true argon tower body 31 from the bottom position P11 and the middle position P13, respectively.

[0038] Figure 1In this configuration, the piping system 5 can be arranged such that the second argon-rich stream x2 condenses into a second argon-rich liquid m2 by exchanging heat with the second oxygen-rich stream y2 in the dummy argon condenser 42. A portion of the second argon-rich liquid m2 is introduced into the true argon column system 3 as argon-rich stream b2, while the other portion of the second argon-rich liquid m2 returns to the dummy argon column body 41. Both of these arrangements are beneficial for argon distillation.

[0039] Figure 1 In both the first air separation unit 10 and the second air separation unit 20, the distillation column system 100 and the distillation column system 200 include high-pressure columns and low-pressure columns with relatively high and low operating pressures, respectively. For the first air separation unit 10, this means... Figure 1 The high-pressure tower 101 and low-pressure tower 102 are mentioned. For the second air separation unit 20, this refers to... Figure 1 The high-pressure tower 201 and the low-pressure tower 202 are included. Figure 1 The diagram also shows a main condenser-evaporator 103 that connects the high-pressure tower 101 and the low-pressure tower 102 of the first air separation unit 10 in a heat-exchangeable relationship, and a main condenser-evaporator 203 that connects the high-pressure tower 201 and the low-pressure tower 202 of the second air separation unit 20 in a heat-exchangeable relationship.

[0040] The piping system 5 can be configured such that the first argon-containing flow a1 is directly introduced from the outlet position P103 of the low-pressure tower 102 of the first air separation unit 10 to the bottom position P11 of the true argon tower body 31; the first oxygen-enriched flow g1 returns from the true argon condenser 32 to the return position P104 of the low-pressure tower 102 of the first air separation unit 10; the liquid q1 accumulated at the bottom of the true argon tower body 31 is pumped back to the guide position P105 of the low-pressure tower 102 of the first air separation unit 10; and the first oxygen-enriched flow y1 is introduced from the bottom position P111 of the high-pressure tower 101 of the first air separation unit 10 to the true argon condenser 32. The guide position P105, outlet position P103, and return position P104 of the low-pressure tower 102 of the first air separation unit 10 are all intermediate positions, and the heights of the guide position P105 and outlet position P103 are approximately equal, while the return position P104 is higher than the outlet position P103. At the bottom of the true argon tower body 31, there is a liquid q1 in which oxygen is enriched. Figure 1 In the process, the position where liquid q1 is discharged from the bottom of the true argon tower body 31 is lower than the return position P105, so the pressure pump 61 is used to return liquid q1.

[0041] It is understandable that when describing a tower, "middle position" means that there are trays above and below that position, i.e., at least one tray. "Top position" and "bottom position" mean that all trays of the tower are located below and above that position, respectively. When describing a position as "equivalent," it means that the number of trays above (or below) the position where the stream enters or exits is the same.

[0042] The piping system 5 is configured such that the second argon-containing flow a2 is directly introduced from the outlet position P203 of the low-pressure tower 202 of the second air separation unit 20 into the bottom position P21 of the dummy argon tower body 41; the second oxygen-enriched flow g2 returns from the dummy argon condenser 42 to the return position P204 of the low-pressure tower 202 of the second air separation unit 20; the liquid q2 accumulated at the bottom of the dummy argon tower body 41 is directly returned to the guide position P205 of the low-pressure tower 202 of the second air separation unit 20; and the second oxygen-enriched flow y2 is introduced from the bottom position P211 of the high-pressure tower 201 of the second air separation unit 20 into the dummy argon condenser 42. The guide position P205, outlet position P203, and return position P204 of the low-pressure tower 202 of the second air separation unit 20 are all intermediate positions, and the heights of the guide position P205 and outlet position P203 are approximately equal, while the return position P204 is higher than the outlet position P203. Figure 1 In the process, the position where liquid q2 is discharged from the bottom of the dummy argon tower 41 is higher than the return position P205, and the return of liquid q2 can be achieved directly by utilizing the difference in water head.

[0043] Figure 1 In the first air separation unit 10, the argon production system 30 is arranged such that the outlet position P103 of the first argon-containing stream a1 from the distillation column system 100 is higher than the inlet position P11 of the first argon-containing stream a1 entering the true argon column system 3. This allows the first argon-containing stream a1 to flow directly from the first air separation unit 10 into the true argon column system 3 using the head difference. The piping system 5 can be configured to pump the argon-rich stream b2 to the true argon column system 3 via a transfer pump 6. The transfer pump 6 can also be replaced by a liquid storage tank. The transfer pump 6 requires only a small power, reducing procurement costs.

[0044] The number of trays in the true argon column body 31 of the true argon column system 3 is at least three times, for example, four times, the number of trays in the dummy argon column body 41 of the dummy argon column system 4. Furthermore, the diameter of the true argon column body 31 is at least 3% larger than the diameter of the dummy argon column body 41, for example, 5%. For example, the base for both the multiple and the proportion can be the corresponding size of the dummy argon column body 41. This balances argon distillation efficiency and cost optimization.

[0045] Figure 1 In the air separation argon production system 30, there may also be a refined argon column 7. The refined argon column 7 is configured to receive the crude argon stream c3 obtained from the rectification of the real argon column system 3, and further rectify it to obtain a refined argon stream. That is, these multiple air separation units can share the refined argon column 7, ultimately obtaining a high-yield refined argon stream. It is understood that the diagram is only a simplified illustration; a condenser may also be installed at the top of the refined argon column 7.

[0046] Figure 1In the piping system 5, a reserved interface 8 may be provided. The reserved interface 8 may be openable and closable, allowing external piping. For example, the reserved interface 8 may be the port of a multi-way valve, for example in... Figure 1 The three-way valve located in the middle has one port remaining, which can be normally closed, but opened when it is necessary to connect to the dummy argon tower system 4 of another second air separation unit 20, so as to receive argon-rich flow b2 from the dummy argon tower system 4 of the other second air separation unit 20. This facilitates the adaptation and upgrading of the plant area.

[0047] It is understood that when the text describes a stream entering the first and second elements sequentially, or uses similar descriptions, it only indicates the order in which the stream enters the first and second elements, and does not exclude the possibility that the stream passes through a third element between the first and second elements, or that the stream passes through a third element before or after the first element. However, the present invention can be limited to embodiments that only pass through all or part of the illustrated substantial elements, especially when specifically stated otherwise. Substantive elements are, for example, the illustrated distillation column, evaporator, pump, etc., and generally do not include piping elements such as valves or flow meters. For example, the text describes that "the first argon-containing stream a1 is directly introduced from the outlet position P103 of the low-pressure column 102 of the first air separation unit 10 into the bottom position P11 of the true argon column body 31," which means that the first argon-containing stream a1 does not pass through any substantial element, such as a pump or a column, from the outlet position P103 to the bottom position P11.

[0048] Unless otherwise clearly indicated, each aspect or embodiment defined herein may be combined with any other aspect or embodiment. In particular, any feature indicated as preferred or advantageous may be combined with any other feature indicated as preferred or advantageous.

[0049] The embodiments described in this specification are merely preferred embodiments of the present invention. These embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of the present invention. All technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation should be within the scope of the present invention.

Claims

1. An air separation argon production system, comprising a true argon tower system, a dummy argon tower system, and a piping system, characterized in that, The true argon column system receives a first argon-containing stream from the distillation column system of the first air separation unit, and the dummy argon column system receives a second argon-containing stream from the distillation column system of a second air separation unit that is different from the first air separation unit. The dummy argon tower system is configured to distill the second argon-containing stream into an argon-rich stream, and the pipeline system is configured to lead the argon-rich stream of the dummy argon tower system to the real argon tower system. The real argon tower system is configured to distill both the first argon-containing stream and the argon-rich stream to obtain a crude argon stream. In this system, the number of trays in the true argon tower body of the true argon tower system is greater than the number of trays in the false argon tower body of the false argon tower system, and the diameter of the cylinder of the true argon tower body is greater than the diameter of the cylinder of the false argon tower body.

2. The air separation argon production system as described in claim 1, characterized in that, It includes multiple dummy argon tower systems, each of which receives a second argon-containing stream from multiple second air separation units, wherein the multiple dummy argon tower systems are configured identically; The air separation argon production system includes only one true argon tower system.

3. The air separation argon production system as described in claim 1, characterized in that, The dummy argon tower system includes a dummy argon condenser and a dummy argon tower body. The piping system is configured such that a second oxygen-enriched stream from the distillation tower system of the second air separation unit flows into the dummy argon condenser, exchanges heat with a second oxygen-enriched stream exiting from the top of the dummy argon tower body, thereby evaporating into a second oxygen-enriched stream, which returns to the distillation tower system of the second air separation unit; and / or The true argon tower system includes a true argon condenser and a true argon tower body. The piping system is configured such that a first oxygen-enriched stream from the distillation tower system of the first air separation unit flows into the true argon condenser and exchanges heat with a first argon-enriched stream from the top of the true argon tower body, thereby evaporating into a first oxygen-enriched stream, which then returns to the distillation tower system of the first air separation unit.

4. The air separation argon production system as described in claim 3, characterized in that, The piping system is configured such that the first argon-containing stream and the argon-rich stream enter the true argon tower body of the true argon tower system, wherein the first argon-containing stream and the argon-rich stream enter the true argon tower body from the bottom position and the middle position, respectively.

5. The air separation argon production system as described in claim 3, characterized in that, The piping system is configured such that the second argon-rich stream condenses into a second argon-rich liquid by exchanging heat with the second oxygen-rich stream in a dummy argon condenser, a portion of the second argon-rich liquid is introduced into the real argon tower system as the argon-rich stream, and the other portion of the second argon-rich liquid returns to the dummy argon tower.

6. The air separation argon production system as described in claim 3, characterized in that, The distillation column systems of both the first and second air separation units include high-pressure columns and low-pressure columns with relatively high and relatively low operating pressures, respectively. The piping system is configured such that the first argon-containing stream is directly introduced from the outlet position of the low-pressure column of the first air separation unit into the bottom position of the true argon column; the first oxygen-enriched stream returns from the true argon condenser to the return position of the low-pressure column of the first air separation unit; liquid accumulated at the bottom of the true argon column is pumped back to the guide position of the low-pressure column of the first air separation unit; and the first oxygen-enriched stream is introduced from the bottom position of the high-pressure column of the first air separation unit into the true argon condenser. The guide position, outlet position, and return position of the low-pressure column of the first air separation unit are all intermediate positions, and the heights of the guide position and outlet position of the low-pressure column of the first air separation unit are approximately equal, while the return position is higher than the outlet position; and / or The piping system is configured such that the second argon-containing flow is directly introduced from the outlet position of the low-pressure tower of the second air separation unit to the bottom position of the dummy argon tower, the second oxygen-enriched flow returns from the dummy argon condenser to the return position of the low-pressure tower of the second air separation unit, the liquid accumulated at the bottom of the dummy argon tower is directly returned to the guide position of the low-pressure tower of the second air separation unit, and the second oxygen-enriched flow is introduced from the bottom position of the high-pressure tower of the second air separation unit to the dummy argon condenser. The guide position, outlet position, and return position of the low-pressure tower of the second air separation unit are all intermediate positions, and the heights of the guide position and outlet position of the low-pressure tower of the second air separation unit are approximately equal, while the return position is higher than the outlet position.

7. The air separation argon production system as described in claim 1, characterized in that, The air separation argon production system is arranged such that the outlet position of the first argon-containing stream from the distillation column system of the first air separation unit is higher than the inlet position of the first argon-containing stream entering the true argon column system, thereby allowing the first argon-containing stream to flow directly from the first air separation unit into the true argon column system using the head difference; and / or The piping system is configured to pump the argon-rich stream to the true argon tower system via a transfer pump.

8. The air separation argon production system as described in claim 1, characterized in that, The number of trays in the true argon tower system is at least three times the number of trays in the dummy argon tower system, and the diameter of the true argon tower is at least three percent larger than the diameter of the dummy argon tower.

9. The air separation argon production system as described in claim 1, characterized in that, It also includes a argon refiner, which is configured to receive the crude argon stream from the true argon column system and further distill it to obtain a refined argon stream.

10. The air separation argon production system as described in claim 1, characterized in that, The pipeline system is equipped with a reserved interface, which is designed to be openable and closable for external pipeline connection.

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