Argon yield increasing device for air separation tower

Abstract

The utility model discloses an argon yield increasing device for an air separation tower, which comprises a base, the upper surface of the base is fixedly connected with a base, an air separation tower body is arranged above the base, the bottom surface of the air separation tower body is fixedly connected with a connecting sleeve, the upper surface of the connecting sleeve is in threaded connection with a group of fixing pins, and the upper surface of the connecting sleeve is in threaded connection with a group of fixing pins. And the air separation tower body is fixedly connected with the base through the connecting sleeve and the fixing pin. According to the device, compressed air is guided into the air separation tower body through the feeding pipe for preliminary separation, mixed gas of nitrogen and oxygen is obtained and separated on the tower packing layer, and materials with light components move upwards along with steam heated by a tower kettle and penetrate through packing to exchange heat with the expanded air heat exchanger, so that the superheat degree of expanded air entering the upper tower can be reduced, and the heat exchange efficiency is improved; the working condition of the rectifying section can be improved, and during exhausting, air flows into the exhaust port after passing through the expansion air flow meter, so that parameter monitoring means are enriched, and quantitative reference basis is provided for process optimization and adjustment.

Description

Technical Field

[0001] This utility model relates to the field of argon production enhancement devices, and in particular to an argon production enhancement device for an air separation tower. Background Technology

[0002] An air separation tower is a device for separating air. Due to the needs of the process, this type of equipment is usually built relatively tall, resembling an iron tower, hence its name. It plays a very important role in large-scale oxygen production industries. Air separation towers are often used to separate argon from the air. Argon is a colorless and odorless monatomic gas with a relative atomic mass of 39.948. It is generally produced by fractional distillation after liquefying air. Argon has a density 1.4 times that of air and 10 times that of helium. Argon is an inert gas that does not react chemically with other substances at room temperature and is insoluble in liquid metals at high temperatures. It is particularly advantageous when welding non-ferrous metals.

[0003] The traditional 30,000 Nm³ oxygen generator underwent several technical upgrades, including replacing the lower column with a packed column instead of a sieve tray column, separating the upper and lower main cooling liquid nitrogen reflux valves, and increasing the height of the crude argon column by 4 meters. Combined with improvements in technical management and operational skills, the oxygen production finally reached 32,000 Nm³. 3 / h, argon production reaches 1100 Nm 3 / h (original design 900Nm) 3 The nitrogen gas produced reached the national standard for high-purity nitrogen. Although the unit has made significant progress in capacity release, it still faces some problems, the most prominent being the irregular fluctuations in the argon fraction flow rate, ranging from 2000 Nm³. 3 With an output of approximately 1000 kWh, even slight negligence can damage the operating conditions of the main tower and the argon tower. In recent years, with the significant increase in production at Chongqing Iron and Steel, the demand for oxygen, nitrogen, and argon gases has increased significantly, making it difficult to meet current production needs. Therefore, we propose an argon production enhancement device for air separation towers to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an argon production enhancement device for air separation towers to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An argon production enhancement device for an air separation tower includes a base, a pedestal fixedly connected to the upper surface of the base, an air separation tower body disposed above the pedestal, a connecting sleeve fixedly connected to the bottom surface of the air separation tower body, a set of fixing pins threadedly connected to the upper surface of the connecting sleeve, the air separation tower body being fixedly connected to the pedestal via the connecting sleeve and the fixing pins, a feed pipe fixedly connected to the left side of the air separation tower body, a feed sleeve fixedly connected to the right side of the feed pipe, an exhaust port fixedly connected to the upper surface of the air separation tower body, a vent port fixedly connected to the upper surface of the air separation tower body, a reboiler return port fixedly connected to the right side of the air separation tower body, two sets of packing layers fixedly connected to the inner wall of the air separation tower body, an expansion air heat exchanger fixedly connected to the inner wall of the air separation tower body, and an expansion air flow meter fixedly connected to the inner top wall of the air separation tower body.

[0007] In a further embodiment, a potential holder is fixedly connected to the upper surface of the base, and two status indicator lights are fixedly connected to the upper surface of the potential holder.

[0008] In a further embodiment, a thermometer is fixedly connected to the right side of the air separation tower body, a pressure gauge is fixedly connected to the left side of the air separation tower body, and a liquid level sensor is fixedly connected to the front of the air separation tower body.

[0009] In a further embodiment, a parameter identification plate is provided on the back of the air separation tower body, and the front of the parameter identification plate is fixedly connected to the back of the air separation tower body.

[0010] In a further embodiment, a set of fixing grooves are provided on the upper surface of the base, and each fixing groove has a positioning hole on its upper surface.

[0011] In a further embodiment, a buzzer alarm is fixedly connected to the upper surface of the potentiometer.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] In operation, compressed air enters the air separation tower body through the feed pipe for preliminary separation, resulting in a mixture of nitrogen and oxygen. This mixture is then further separated on the tower packing. The lighter components move upwards with the heated steam in the reboiler, exchanging heat with the expansion air heat exchanger. This not only reduces the superheat of the expansion air entering the tower but also improves the operating conditions of the rectification section, allowing more air to participate in the rectification process. Consequently, without increasing the air compressor load, the oxygen production increases from 32,200 Nm³ before the modification. 3 / h increased to 34000 Nm 3The air volume per hour ( / h) increases the oxygen extraction rate and reduces the waste of raw material air. Furthermore, during exhaust, the air flows into the exhaust port after passing through the expansion air flow meter, enriching the means of parameter monitoring and providing a quantitative reference for process optimization and adjustment. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of an argon production enhancement device for an air separation tower.

[0015] Figure 2 A rear-view three-dimensional structural diagram of an argon production enhancement device for an air separation tower.

[0016] Figure 3 This is a front sectional view of the air separation tower body in the argon production enhancement device for the air separation tower.

[0017] Figure 4 Argon production enhancement unit for air separation tower Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0018] In the diagram: 1. Base; 2. Fixing groove; 3. Positioning hole; 4. Base; 5. Connecting sleeve; 6. Air separation tower body; 7. Fixing pin; 8. Pressure gauge; 9. Thermometer; 10. Liquid level sensor; 11. Feed pipe; 12. Feed sleeve; 13. Reboiler return port; 14. Exhaust port; 15. Vent port; 16. Parameter label; 17. Potential base; 18. Status indicator light; 19. Buzzer alarm; 20. Expansion air flow meter; 21. Packing layer; 22. Expansion air heat exchanger. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] 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.

[0022] Please see Figure 1-4 In this utility model, an argon production enhancement device for an air separation tower includes a base 1, a base 4 fixedly connected to the upper surface of the base 1, an air separation tower body 6 disposed above the base 4, a connecting sleeve 5 fixedly connected to the bottom surface of the air separation tower body 6, a set of fixing pins 7 threadedly connected to the upper surface of the connecting sleeve 5, the air separation tower body 6 being fixedly connected to the base 4 via the connecting sleeve 5 and the fixing pins 7, a feed pipe 11 fixedly connected to the left side of the air separation tower body 6, a feed sleeve 12 fixedly connected to the right side of the feed pipe 11, an exhaust port 14 fixedly connected to the upper surface of the air separation tower body 6, a vent port 15 fixedly connected to the upper surface of the air separation tower body 6, and a reboiler return port 13 fixedly connected to the right side of the air separation tower body 6. Two sets of packing layers 21 are fixedly connected to the inner wall of the air separation tower body 6. An expansion air heat exchanger 22 is fixedly connected to the inner wall of the air separation tower body 6. An expansion air flow meter 20 is fixedly connected to the inner top wall of the air separation tower body 6. Compressed air is introduced into the air separation tower body 6 through the feed pipe 11 for preliminary separation, resulting in a mixture of nitrogen and oxygen. This mixture is then separated on the tower packing layer 21. The lighter components of the material move upward with the steam heated in the tower bottom, passing through the packing and exchanging heat with the expansion air heat exchanger 22. This not only reduces the superheat of the expansion air entering the upper tower but also improves the operating conditions of the rectification section, allowing more air to participate in the rectification. Thus, without increasing the air compressor load, the oxygen production increases from 32,200 Nm³ before the modification. 3 / h increased to 34000 Nm 3 The flow rate is / h, which improves the oxygen extraction rate and reduces the waste of raw material air. Furthermore, during exhaust, the air flows through the expansion air meter 20 and then into the exhaust port 14, enriching the parameter monitoring methods and providing a quantitative reference for process optimization and adjustment. The packing layer 21 uses stainless steel corrugated packing with a specific surface area ≥250m². 2 / m 3 The gas-liquid contact efficiency is improved by more than 12% compared with traditional sieve plates; the expansion air heat exchanger 22 achieves heat exchange through an aluminum plate-fin structure, reducing the superheat of the expansion air to ≤5℃, which meets the temperature requirements of the upper column rectification section. Corrugated packing and plate-fin heat exchangers are commonly used components of air separation equipment.

[0023] A potential base 17 is fixedly connected to the upper surface of the base 1, and two status indicator lights 18 are fixedly connected to the upper surface of the potential base 17. The status indicator lights 18 make it easy for staff to understand the operating status of the device. A thermometer 9 is fixedly connected to the right side of the air separation tower body 6. The thermometer 9 monitors a temperature range of -182℃ to -178℃. When the temperature is higher than -178℃, the reboiler heating is reduced to adjust the temperature. The pressure gauge 8 monitors the pressure fluctuation range and controls it within ±0.02MPa. When the pressure exceeds the limit, the opening of the vent 15 is finely adjusted for calibration. Combined with the data from the expansion air flow meter 20, the amount of expansion air introduced is stabilized. Within ±5% of the design value, the argon fraction flow rate fluctuation is ensured to be less than 500 Nm³ / h, guaranteeing a stable argon extraction rate. A pressure gauge 8 is fixedly connected to the left side of the air separation tower body 6, and a liquid level sensor 10 is fixedly connected to the front side of the air separation tower body 6. The cooperation of the above structures helps to realize real-time monitoring of the air separation tower, improve production efficiency and product quality, and ensure safe operation of the equipment. A parameter identification plate 16 is provided on the back of the air separation tower body 6, and the front of the parameter identification plate 16 is fixedly connected to the back of the air separation tower body 6. Through the setting of the parameter identification plate 16, it is easy for the staff to understand the basic parameters and usage methods of this device.

[0024] A set of fixing slots 2 are provided on the upper surface of the base 1. Each fixing slot 2 has a positioning hole 3 on its upper surface. The fixing slots 2 and positioning holes 3 facilitate the installation of the device by the staff. A buzzer alarm 19 is fixedly connected to the upper surface of the potential base 17. The buzzer alarm 19 can help the operator to detect problems in time and take corresponding measures to solve them, so as to avoid greater losses and equipment damage.

[0025] The working principle of this utility model is as follows:

[0026] When in use, first move the device to the location of use, position it using the base 1, fixing groove 2 and positioning hole 3, and install the air separation tower body 6 using the base 4 and connecting sleeve 5. When in use, compressed air enters the air separation tower body 6 through the feed pipe 11 for preliminary separation, obtaining a mixture of nitrogen and oxygen, which is then separated on the tower packing layer 21. The lighter components of the material move upward with the heated steam in the tower bottom, pass through the packing and exchange heat with the expansion air heat exchanger 22, and when exhausting, flow into the exhaust port 14 after passing through the expansion air flow meter 20.

[0027] 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.

[0028] 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 device for increasing argon production in an air separation tower, characterized in that: The system includes a base (1), a base (4) fixedly connected to the upper surface of the base (1), an air separation tower body (6) above the base (4), a connecting sleeve (5) fixedly connected to the bottom surface of the air separation tower body (6), a set of fixing pins (7) threadedly connected to the upper surface of the connecting sleeve (5), the air separation tower body (6) fixedly connected to the base (4) through the connecting sleeve (5) and the fixing pins (7), a feed pipe (11) fixedly connected to the left side of the air separation tower body (6), and a feed pipe (11) fixedly connected to the right side of the feed pipe (11). The air separation tower body (6) has a feed sleeve (12), an exhaust port (14) is fixedly connected to the upper surface of the air separation tower body (6), an air vent (15) is fixedly connected to the upper surface of the air separation tower body (6), a reboiler return port (13) is fixedly connected to the right side of the air separation tower body (6), two sets of packing layers (21) are fixedly connected to the inner wall of the air separation tower body (6), an expansion air heat exchanger (22) is fixedly connected to the inner wall of the air separation tower body (6), and an expansion air flow meter (20) is fixedly connected to the inner top wall of the air separation tower body (6).

2. The argon production enhancement device for an air separation tower according to claim 1, characterized in that: A potential base (17) is fixedly connected to the upper surface of the base (1), and two status indicator lights (18) are fixedly connected to the upper surface of the potential base (17).

3. The argon production enhancement device for an air separation tower according to claim 1, characterized in that: A thermometer (9) is fixedly connected to the right side of the air separation tower body (6), a pressure gauge (8) is fixedly connected to the left side of the air separation tower body (6), and a liquid level sensor (10) is fixedly connected to the front of the air separation tower body (6).

4. The argon production enhancement device for an air separation tower according to claim 1, characterized in that: The back of the air separation tower body (6) is provided with a parameter identification plate (16), and the front of the parameter identification plate (16) is fixedly connected to the back of the air separation tower body (6).

5. The argon production enhancement device for an air separation tower according to claim 1, characterized in that: The upper surface of the base (1) is provided with a set of fixing grooves (2), and each fixing groove (2) is provided with a positioning hole (3) on its upper surface.

6. The argon production enhancement device for an air separation tower according to claim 2, characterized in that: A buzzer alarm (19) is fixedly connected to the upper surface of the potential base (17).

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