Air separation device adopting air cooling tower and cooler

Abstract

The utility model provides an air separation device adopting an air cooling tower and a cooler, which comprises an air filtering system, an air compressor system, an air pre-cooling system, an air purification system, a circulating compressor system, a high and low temperature expansion system and an air rectification system, the air pre-cooling system comprises an air cooling tower, a water cooling tower, a water chilling unit, a water pump I and a water pump II, a circulating water cooler is arranged between the air turbine compressor and the bottom of the air cooling tower, the bottom output of the air cooling tower is connected with the top of the water cooling tower, a low-pressure nitrogen pipeline is arranged outside the bottom of the water cooling tower, and the bottom output of the water cooling tower is connected with the water pump I and the water pump II. The water pump I and the water pump II are respectively connected with the water chilling unit, the water chilling unit is connected with the tower top of the air cooling tower, and a chilled water closed circulation path is arranged on a tower top pipeline, leading to the air cooling tower, of the water chilling unit. The utility model avoids the influence of direct contact on product quality which does not meet the standard requirement, and effectively avoids the influence of harmful impurities.

Description

Technical Field

[0001] This utility model relates to the field of air separation technology, specifically to an air separation device employing an air-cooled tower and a cooler. Background Technology

[0002] The company's existing air separation unit (AS / RS) is an industrial system that separates various gas components from the air to produce oxygen, nitrogen, liquid oxygen, and liquid nitrogen. It comprises an air filtration system, an air compressor system, an air precooling system, an air purification system, a circulating compressor system, a high- and low-temperature expansion system, and an air distillation system. In the existing technology, the raw air is filtered, compressed, and pressurized by the air filtration and air compressor systems, then enters the air precooling system's air-cooling tower for cooling. In the lower, high-temperature section of the air-cooling tower, it comes into contact with sprayed circulating water for further cooling, while in the upper, low-temperature section, it comes into contact with chilled water from a cooling tower for further cooling. Currently, the company's air separation products are mainly medical and food products. However, the high-temperature cooling water from the circulating system contains harmful impurities, which directly affect product quality and do not meet standards. Therefore, how to avoid the impact of these harmful impurities has become a research direction. Utility Model Content

[0003] The purpose of this invention is to provide an air separation device that uses an air-cooled tower and a cooler to solve the above problems, thereby avoiding direct contact that could affect product quality and prevent it from failing to meet standard requirements, and effectively avoiding the influence of harmful impurities.

[0004] This utility model achieves the above-mentioned objectives through the following technical solution: an air separation unit employing an air-cooled tower and a cooler, comprising an air filtration system, an air compressor system, an air precooling system, an air purification system, a circulating compressor system, a high and low temperature expansion system, and an air distillation system. The air compressor system includes an air turbine compressor. The air precooling system includes an air-cooled tower, a water-cooled tower, a chiller unit, water pump I, and water pump II. A circulating water cooler is installed between the air turbine compressor and the bottom of the air-cooled tower. The top output of the air-cooled tower is connected to the air purification system. The bottom output of the air-cooled tower is connected to the top of the water-cooled tower. A low-pressure nitrogen pipeline is installed outside the bottom of the water-cooled tower. The bottom output of the water-cooled tower is connected to water pump I and water pump II respectively. Water pump I and water pump II are respectively connected to the chiller unit. The chiller unit is connected to the top of the air-cooled tower. A closed-loop chilled water circulation path is provided on the pipeline from the chiller unit to the top of the air-cooled tower.

[0005] As a preferred embodiment of this invention, the air filtration system is a self-cleaning air filter.

[0006] As a preferred embodiment of this utility model, the bottom of the air-cooled tower is provided with a liquid level control alarm interlock device and a liquid level signal remote transmission device I, and the liquid level control alarm interlock device and the liquid level signal remote transmission device I are connected together.

[0007] As a preferred embodiment of this invention, a temperature detection element I is provided on the pipeline from the top of the air-cooled tower to the air purification system, and a temperature alarm device is connected to the temperature detection element I.

[0008] As a preferred embodiment of this utility model, a temperature detection element II is provided on the pipeline from the bottom of the water-cooled tower to water pump I and water pump II, and a temperature indicator device I is provided on the temperature detection element II.

[0009] As a preferred embodiment of this invention, the water-cooled tower is provided with an overflow pipe and a drainage ditch.

[0010] As a preferred embodiment of this invention, the water-cooled tower is equipped with a liquid level signal remote transmission device II.

[0011] As a preferred embodiment of this utility model, a flow transmitter and a temperature detection element III are installed on the top pipe of the chiller unit leading to the air-cooled tower. The flow transmitter is connected to a flow indication alarm device, and the temperature detection element III is connected to a temperature indication device II.

[0012] In a preferred embodiment of this utility model, water pump I is connected to motor I, water pump II is connected to motor II, water pump I is connected to water filter I, water pump II is connected to water filter II, water pump I is connected to pressure display I, and water pump II is connected to pressure display II.

[0013] The beneficial effects of this utility model are as follows: This utility model adopts air separation unit technology of air-cooled tower + cooler. Since a circulating water cooler is installed between the air turbine compressor and the bottom of the air-cooled tower, by adding a circulating water cooler before the air precooling system, the hot air from the air turbine compressor can be cooled down before precooling. Water flows inside the pipes and is drawn by water pumps I and II. Low-pressure nitrogen pipelines are installed outside the bottom of the water-cooled tower, eliminating the need for cooling water spray cooling in the lower section. The bottom output of the water-cooled tower is connected to water pumps I and II respectively. Pump I and Pump II are connected to the chiller unit, which is connected to the top of the air-cooled tower. A closed-loop chilled water circulation system is installed on the pipeline from the chiller unit to the top of the air-cooled tower. The chilled water in this upper section adopts a closed-loop circulation method, and the cold source comes from the chiller unit. The chilled water can effectively remove impurities. After the modification, the pollution caused by the contact between the compressed air of the raw material and the external water is avoided. The direct contact of the high-temperature cooling water of the circulating water with harmful impurities is avoided, which would affect the product quality and fail to meet the standard requirements. This improves the product quality and meets the relevant product standard requirements. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the principle of this utility model;

[0015] In the diagram: 1. Air turbine compressor; 2. Air-cooled tower; 3. Water-cooled tower; 4. Chiller unit; 5. Water pump I; 6. Water pump II; 7. Circulating water cooler; 8. Low-pressure nitrogen pipeline; 9. Chilled water closed circulation loop; 10. Self-cleaning air filter; 11. Liquid level control alarm interlock device; 12. Liquid level signal remote transmission device I; 13. Temperature detection element I; 14. Temperature alarm device; 15. Temperature detection element II; 16. Temperature indicator device I; 17. Overflow pipe; 18. Drainage ditch; 19. Liquid level signal remote transmission device II; 20. Flow transmitter; 21. Temperature detection element III; 22. Flow indicator alarm device; 23. Temperature indicator device II; 24. Motor I; 25. Motor II; 26. Water filter I; 27. Water filter II; 28. Pressure display I; 29. ​​Pressure display II. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1 As shown, an air separation unit employing an air-cooled tower and a cooler includes an air filtration system, an air compressor system, an air precooling system, an air purification system, a circulating compressor system, a high-low temperature expansion system, and an air distillation system. The air compressor system includes an air turbine compressor 1. The air precooling system includes an air-cooled tower 2, a water-cooled tower 3, a chiller unit 4, a water pump I5, and a water pump II6. A circulating water cooler 7 is installed between the air turbine compressor 1 and the bottom of the air-cooled tower 2. The top output of the air-cooled tower 2 is connected to the air purification system, and the bottom output of the air-cooled tower 2 is connected to the top of the water-cooled tower 3. A low-pressure nitrogen pipeline 8 is installed outside the bottom of the water-cooled tower 3. The bottom output of the water-cooled tower 3 is connected to water pump I5 and water pump II6, respectively. Water pump I5 and water pump II6 are respectively connected to the chiller unit 4. The chiller unit 4 is connected to the top of the air-cooled tower 2. A chilled water closed circulation path 9 is installed on the pipeline from the chiller unit 4 to the top of the air-cooled tower 2.

[0018] In this embodiment, the present invention adopts air separation unit technology of air-cooled tower + cooler. Since a circulating water cooler 7 is installed between the bottom of the air turbine compressor 1 and the air-cooled tower 2, by adding a circulating water cooler 7 before the air precooling system, the hot air coming out of the air turbine compressor 1 can be cooled down before precooling. Water flows inside the pipes and is drawn by water pumps I5 and II6. Low-pressure nitrogen pipeline 8 is installed outside the bottom of the water-cooled tower 3, eliminating the need for cooling water spray cooling in the lower section. The bottom output of the water-cooled tower 3 is connected to water pumps I5 and II6 respectively. Pumps II6, I5, and II6 are connected to chiller unit 4, which is connected to the top of air-cooled tower 2. A closed-loop chilled water circulation path 9 is installed on the pipeline from chiller unit 4 to the top of air-cooled tower 2. The chilled water in this upper section adopts a closed-loop circulation method, and the cold source comes from chiller unit 4. The chilled water can effectively remove impurities. After the modification, the pollution caused by the contact between the raw material compressed air and the external water is avoided. The direct contact of the high-temperature cooling water of the circulating water with harmful impurities is avoided, which affects the product quality and does not meet the standard requirements. This improves the product quality and meets the relevant product standard requirements.

[0019] Specifically, the air filtration system, air compressor system, air precooling system, air purification system, circulating compressor system, high and low temperature expansion system, and air distillation system are typical components of a conventional air separation unit. By adding a circulating water cooler 7 before the air precooling system, the traditional lower-section cooling method of water spraying is eliminated, resulting in improved practicality. Air enters from the bottom of the air-cooled tower 2 and exits from the top, while chilled water enters from the top and exits from the bottom, utilizing contact heat exchange to lower the air temperature. Low-pressure nitrogen enters through the low-pressure nitrogen pipeline 8 and enters the lower part of the water-cooled tower 3, where it fully contacts and exchanges heat with the cooling water in the upper part of the water-cooled tower 3 to generate chilled water.

[0020] As a technical optimization of this utility model, the air filtration system is a self-cleaning air filter 10.

[0021] In this embodiment, the self-cleaning air filter 10 has a self-cleaning function and performs well.

[0022] As a technical optimization of this utility model, the bottom of the air-cooled tower 2 is provided with a liquid level control alarm interlock device 11 and a liquid level signal remote transmission device I12, which are connected to each other.

[0023] In this embodiment, the liquid level control alarm interlock device 11 plays an important role in safety protection, automated control, stable operation and fault prevention, and the liquid level signal remote transmission device I12 can perform real-time monitoring and control, which is convenient for remote operation.

[0024] As a technical optimization of this utility model, a temperature detection element I13 is installed on the pipeline from the top of the air-cooled tower 2 to the air purification system, and a temperature alarm device 14 is connected to the temperature detection element I13.

[0025] In this embodiment, the temperature detection element I13 is used to detect the temperature, and the temperature alarm device 14 is used to issue an alarm and shut down the equipment to prevent overheating.

[0026] As a technical optimization of this utility model, a temperature detection element II15 is installed on the pipeline from the bottom of the water-cooled tower 3 to the water pump I5 and the water pump II6, and a temperature indicator device I16 is installed on the temperature detection element II15.

[0027] In this embodiment, the temperature sensing element II15 is used to detect the temperature, and the temperature indicating device I16 facilitates the observation of temperature parameters.

[0028] As a technical optimization of this utility model, the water-cooled tower 3 is provided with an overflow pipe 17 and a drainage ditch 18.

[0029] In this embodiment, the overflow pipe 17 prevents the water level in the water-cooled tower 3 from being too high, thus preventing it from affecting the normal and safe operation of the air separation unit. The drainage ditch 18 is used to collect and discharge excess water in the water-cooled tower 3, maintaining the normal operation of the system and the stability of the water level.

[0030] As a preferred embodiment of this invention, the water-cooled tower 3 is equipped with a liquid level signal remote transmission device II19.

[0031] In this embodiment, the liquid level signal remote transmission device II19 can perform real-time monitoring and control, facilitating remote operation.

[0032] As a technical optimization of this utility model, a flow transmitter 20 and a temperature detection element III 21 are installed on the top pipe of the chiller unit 4 leading to the air-cooled tower 2. The flow transmitter 20 is connected to a flow indicator alarm device 22, and the temperature detection element III 21 is connected to a temperature indicator device II 23.

[0033] In this embodiment, the flow transmitter 20 is used to measure the flow rate, the flow indicator alarm device 22 is used to monitor the rotation speed and working status of the water flow to help operators understand the operation of the system, the temperature detection element III 21 is used to detect the temperature, and the temperature indicator device II 23 is used to facilitate the observation of temperature parameters.

[0034] As a technical optimization of this utility model, water pump I5 is connected to a motor I24, water pump II6 is connected to a motor II25, water pump I5 is connected to a water filter I26, water pump II6 is connected to a water filter II27, water pump I5 is connected to a pressure display I28, and water pump II6 is connected to a pressure display II29.

[0035] In this embodiment, motors I24 and II25 drive water pumps I5 and II6 respectively, water filters I26 and II27 can remove impurities, soften water, and remove harmful substances, and pressure displays I28 and II29 can display pressure status.

[0036] 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.

[0037] 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. An air separation plant employing an air cooling tower and a cooler, comprising an air filtration system, an air compressor system, an air precooling system, an air purification system, a circulation compressor system, a high and low temperature expansion system, and an air rectification system, the air compressor system comprising an air turbine compressor (1), characterized in that: The air pre-cooling system comprises an air cooling tower (2), a water cooling tower (3), a water chiller unit (4), a water pump I (5) and a water pump II (6), the air turbine compressor (1) is provided with a circulating water cooler (7) between the bottom of the air cooling tower (2), the top of the air cooling tower (2) is connected with an air purification system, the bottom of the air cooling tower (2) is connected with the top of the water cooling tower (3), the bottom of the water cooling tower (3) is provided with a low-pressure nitrogen gas pipeline (8), the bottom of the water cooling tower (3) is connected with the water pump I (5) and the water pump II (6) respectively, the water pump I (5) and the water pump II (6) are connected with the water chiller unit (4), the water chiller unit (4) is connected with the top of the air cooling tower (2), and the water chiller unit (4) is provided with a chilled water closed circulation loop (9) on the pipeline leading to the top of the air cooling tower (2).

2. The air separation unit employing an air cooling column and a cooler according to claim 1, wherein: The air filter system is a self-cleaning air filter (10).

3. The air separation unit employing an air cooling column and a cooler of claim 1, wherein: The bottom of the air cooling tower (2) is provided with a liquid level control alarm interlocking device (11) and a liquid level signal remote transmission device I (12), and the liquid level control alarm interlocking device (11) and the liquid level signal remote transmission device I (12) are connected.

4. The air separation unit employing an air cooling column and a cooler of claim 1, wherein: The pipeline of the air cooling tower (2) output to the air purification system is provided with a temperature detection element I (13), and the temperature detection element I (13) is connected with a temperature alarm device (14).

5. The air separation unit employing an air cooling column and a cooler of claim 1, wherein: The pipeline of the water cooling tower (3) output to the water pump I (5) and the water pump II (6) is provided with a temperature detection element II (15), and the temperature detection element II (15) is provided with a temperature indicating device I (16).

6. The air separation unit employing an air cooling column and a cooler of claim 1, wherein: The water cooling tower (3) is provided with an overflow pipe (17) and a drainage ditch (18).

7. The air separation unit employing an air cooling column and a cooler of claim 1, wherein: The water cooling tower (3) is provided with a liquid level signal remote transmission device II (19).

8. The air separation unit employing an air cooling column and a cooler of claim 1, wherein: The pipeline of the water chiller unit (4) leading to the top of the air cooling tower (2) is provided with a flow transmitter (20) and a temperature detection element III (21), the flow transmitter (20) is connected with a flow indication alarm device (22), and the temperature detection element III (21) is connected with a temperature indicating device II (23).

9. The air separation unit employing an air cooling column and a cooler of claim 1, wherein: The water pump I (5) is connected with a motor I (24), the water pump I (5) is connected with a motor II (25), the water pump I (5) is connected with a water filter I (26), the water pump II (6) is connected with a water filter II (27), the water pump I (5) is connected with a pressure display I (28), and the water pump II (6) is connected with a pressure display II (29).

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