Air separation device capable of quickly recovering full-load operation

Abstract

The utility model relates to the technical field of air separation, in particular to an air separation device capable of quickly recovering full-load operation, which comprises an upper cooling tower, a main cooler, a lower cooling tower, a crude argon condenser, a crude argon tower, a pure argon condenser, a pure argon tower and a heat exchanger, the main cooler is communicated with a liquid nitrogen pipeline and a liquid oxygen pipeline, and the lower cooling tower is communicated with a compressed air pipeline. A first cooling liquid pipeline is communicated between the lower cooling tower and the heat exchanger, a second cooling liquid pipeline is communicated between the heat exchanger and the crude argon condenser, a third cooling liquid pipeline is communicated between the second cooling liquid pipeline and the pure argon condenser, and a first condensate pipeline is communicated between the crude argon condenser and the upper cooling tower. A first flash steam pipeline is communicated between the crude argon condenser and the upper cooling tower, a first crude argon pipeline is communicated between the upper cooling tower and the crude argon tower, and a first pure argon pipeline is communicated with the bottom of the pure argon tower. The air separation device effectively solves the problems of low production efficiency and high energy consumption of the existing air separation device.

Description

Technical Field

[0001] The utility model relates to the technical field of air separation, and is an air separation device which can quickly recover full-load operation. Background Art

[0002] Air separation technology is an integral part of modern industrial production processes. It involves the process of extracting oxygen, nitrogen, argon and other gases from the air. These gases play a key role in multiple industries, from healthcare to metal processing to the food and beverage industry. Effective air separation technology not only improves the production efficiency of these industries, but also contributes to environmental protection and sustainable development. Cryogenic air separation is an air separation method based on the principle of low-temperature liquefaction and distillation of gases. This method first compresses and precools the air, and then distills it at extremely low temperatures. The low-temperature boiling point of nitrogen is -196°C, the low-temperature boiling point of argon is -186°C, and the low-temperature boiling point of oxygen is -183°C. The distillation of these three liquid gases at extremely low temperatures tests the high construction and operation costs of air separation units, as well as the need for complex equipment. In addition, the energy consumption of the cryogenic air separation operation process is also relatively high.

[0003] A coal chemical enterprise uses an 80000N m³ / h air separation unit manufactured by Linde to separate oxygen, nitrogen and argon from the air. The compressed air in the precooling tower must be precooled and purified before entering the distillation tower for distillation. Liquid oxygen, liquid nitrogen and liquid argon are separated by cryogenic distillation. In this air separation process, the compressed air precooling and purification process takes more than 330 minutes to reach the predetermined process temperature. After the compressed air is precooled and purified to the required minimum temperature, coarse distillation and fine distillation are carried out. It also takes a certain amount of time to establish the process liquid level in the coarse distillation tower and the fine distillation tower to achieve full load operation of this air separation unit. Long-term compressed air precooling and purification reduces the production efficiency of the entire air separation unit and also affects the normal startup of downstream production units. In addition, long-term compressed air precooling and purification requires a large amount of condensing medium to reduce the temperature of the compressed air, and the energy consumption is relatively high, which reduces the economic benefits of the enterprise.

[0004] To sum up, solving the problems of low production efficiency and high energy consumption of air separation devices has become a difficult technical challenge for enterprises to overcome. Summary of the invention

[0005] The utility model provides an air separation device that can quickly resume full-load operation, overcomes the deficiencies of the above-mentioned prior art, and can effectively solve the problems of low production efficiency and high energy consumption in the existing air separation device.

[0006] The technical scheme of the utility model is achieved through the following measures: an air separation device for quickly restoring full-load operation, comprising an upper cooling tower, a main cooler, a lower cooling tower, a crude argon condenser, a crude argon tower, a refined argon condenser, a refined argon tower, and a heat exchanger, wherein the upper cooling tower, the main cooler, and the lower cooling tower are fixedly connected in sequence, a liquid nitrogen pipeline is fixedly connected to the first liquid outlet of the main cooler, a liquid oxygen pipeline is fixedly connected to the second liquid outlet of the main cooler, a compressed air pipeline is fixedly connected to the middle air inlet of the lower cooling tower, a first cooling liquid pipeline is fixedly connected between the bottom liquid outlet of the lower cooling tower and the first liquid inlet at the bottom of the heat exchanger, a second cooling liquid pipeline is fixedly connected between the first liquid outlet at the top of the heat exchanger and the upper liquid inlet of the crude argon condenser, a third cooling liquid pipeline is fixedly connected between the second cooling pipeline and the upper liquid inlet of the refined argon condenser, a lower liquid outlet of the crude argon condenser and the first upper inlet of the upper cooling tower are fixedly connected A first condensate pipeline is connected thereto, a second condensate pipeline is fixedly connected between the lower liquid outlet of the refined argon condenser and the first condensate pipeline, a first flash steam pipeline is fixedly connected between the top gas outlet of the crude argon condenser and the second upper inlet of the upper cooling tower, a second flash steam pipeline is fixedly connected between the top gas outlet of the refined argon condenser and the first flash steam pipeline, a first crude argon pipeline is fixedly connected between the lower outlet of the upper cooling tower and the middle inlet of the crude argon tower, a second crude argon pipeline is fixedly connected between the bottom liquid outlet of the crude argon tower and the lower liquid inlet of the upper cooling tower, a third crude argon pipeline is fixedly connected between the upper outlet of the crude argon tower and the middle inlet of the refined argon tower, the first refined argon pipeline is fixedly connected to the bottom liquid outlet of the refined argon tower, the second refined argon pipeline is fixedly connected between the first refined argon pipeline and the second liquid inlet at the bottom of the heat exchanger, and the third refined argon pipeline is fixedly connected between the second liquid outlet at the top of the heat exchanger and the lower liquid inlet of the refined argon tower.

[0007] The following are further optimizations and / or improvements to the above utility model technical solution:

[0008] A crude argon pump is fixedly installed on the second crude argon pipeline.

[0009] A heat medium pipe line is arranged in the heat exchanger, the outlet of the first cooling liquid pipeline is fixedly connected with the inlet of the heat medium pipe line, and the outlet of the heat medium pipe line is fixedly connected with the inlet of the second cooling pipeline.

[0010] The heat exchanger is provided with a cold medium pipe line, the outlet of the second refined argon pipeline is fixedly connected with the inlet of the heat exchange cold medium pipe line, and the outlet of the cold medium pipe line is fixedly connected with the inlet of the third refined argon pipeline.

[0011] The third crude argon pipeline is fixedly connected to a first discharge pipeline.

[0012] The upper part of the refined argon tower is fixedly connected with a second discharge pipeline.

[0013] The lower cooling tower is provided with a first liquid level gauge, the crude argon tower is provided with a second liquid level gauge, the refined argon tower is provided with a third liquid level gauge, the crude argon condenser is provided with a fourth liquid level gauge, and the refined argon condenser is provided with a fifth liquid level gauge.

[0014] A first control valve is fixedly installed on the second coolant pipeline between the third coolant pipeline and the upper liquid inlet of the crude argon condenser, a second control valve is fixedly installed on the third coolant pipeline, a third control valve is fixedly installed on the first condensate pipeline between the lower liquid outlet of the crude argon condenser and the second condensate pipeline, a fourth control valve is fixedly installed on the second condensate pipeline, a fifth control valve is fixedly installed on the first flash steam pipeline between the top gas outlet of the crude argon condenser and the second flash steam pipeline, a sixth control valve is fixedly installed on the second flash steam pipeline, a seventh control valve is fixedly installed on the second crude argon pipeline between the bottom liquid outlet of the crude argon tower and the crude argon pump, and an eighth control valve is fixedly installed on the third crude argon pipeline between the first discharge pipeline and the middle inlet of the refined argon tower.

[0015] The above-mentioned device also includes a controller, and the first liquid level gauge, the second liquid level gauge, the third liquid level gauge, the fourth liquid level gauge, the fifth liquid level gauge, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the sixth control valve, the seventh control valve, and the eighth control valve are all electrically connected to the controller.

[0016] The utility model has a reasonable and compact structure and is easy to use. It adopts low-temperature air separation technology and uses the device's own condensate circulation to provide sustainable circulating cooling capacity for compressed air cooling and liquefaction, thereby reducing production costs. It also improves the air separation process, thereby achieving the simultaneous implementation of the three important process flows of compressed air precooling, purification, and distillation, thereby improving production efficiency and having the characteristics of safety, labor saving, simplicity, and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 This is a schematic diagram of the process flow of the utility model.

[0018] Attached Figure 1The codes are as follows: 1 is the upper cooling tower, 2 is the main cooler, 3 is the lower cooling tower, 4 is the crude argon condenser, 5 is the crude argon tower, 6 is the refined argon condenser, 7 is the refined argon tower, 8 is the liquid nitrogen pipeline, 9 is the liquid oxygen pipeline, 10 is the second coolant pipeline, 11 is the third coolant pipeline, 12 is the first condensate pipeline, 13 is the second condensate pipeline, 14 is the first flash steam pipeline, 15 is the second flash steam pipeline, 16 is the first crude argon pipeline, 17 is the second crude argon pipeline, 18 is the third crude argon pipeline, 19 is the first refined argon pipeline, 20 is the crude argon pump, 21 is the heat exchanger, 22 is the heat exchanger, 23 is the heat exchanger, 24 is the heat exchanger, 25 is the heat exchanger, 26 is the heat exchanger, 27 is the heat exchanger, 28 is the heat exchanger, 29 is the heat exchanger, 30 is the heat exchanger, 31 is the heat exchanger, 32 is the heat exchanger, 33 is the heat exchanger, 34 is the heat exchanger, 35 is the heat exchanger, 36 is the heat exchanger, 37 is the heat exchanger, 38 is the heat exchanger, 39 is the heat exchanger, 40 is the heat exchanger, 41 is the heat exchanger, 42 is the heat exchanger, 43 is the heat exchanger, 44 is the heat exchanger, 45 is the heat exchanger, 46 is the heat exchanger, 47 is the heat exchanger, 48 is the heat exchanger, 49 is the heat exchanger, 50 is the heat exchanger, 51 is the heat exchanger, 52 is the heat exchanger, 53 is the heat exchanger, 54 is the second refined argon pipeline, 23 is the first discharge pipeline, 24 is the second discharge pipeline, 25 is the first liquid level gauge, 26 is the second liquid level gauge, 27 is the third liquid level gauge, 28 is the fourth liquid level gauge, 29 is the fifth liquid level gauge, 30 is the first control valve, 31 is the second control valve, 32 is the third control valve, 33 is the fourth control valve, 34 is the fifth control valve, 35 is the sixth control valve, 36 is the seventh control valve, 37 is the eighth control valve, 38 is the compressed air pipeline, 39 is the first coolant pipeline, 40 is the third refined argon pipeline, 41 is the hot medium pipeline, and 42 is the cold medium pipeline. DETAILED DESCRIPTION

[0019] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0020] In the present invention, unless otherwise specified, the equipment and devices used are all the equipment and devices known and used in the art.

[0021] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.

[0022] The present invention is further described below in conjunction with the embodiments and drawings:

[0023] Embodiment 1: As attached Figure 1As shown, the air separation device that quickly resumes full-load operation includes an upper cooling tower 1, a main cooler 2, a lower cooling tower 3, a crude argon condenser 4, a crude argon tower 5, a refined argon condenser 6, a refined argon tower 7, and a heat exchanger 21. The upper cooling tower 1, the main cooler 2, and the lower cooling tower 3 are fixedly connected in sequence. The first liquid outlet of the main cooler 2 is fixedly connected to a liquid nitrogen pipeline 8, the second liquid outlet of the main cooler 2 is fixedly connected to a liquid oxygen pipeline 9, the middle air inlet of the lower cooling tower 3 is fixedly connected to a compressed air pipe 38, and the lower cooling tower 3 is fixedly connected to a compressed air pipe 38. A first cooling liquid pipeline 39 is fixedly connected between the bottom liquid outlet of the tower 3 and the first liquid inlet at the bottom of the heat exchanger 21, a second cooling liquid pipeline 10 is fixedly connected between the first liquid outlet at the top of the heat exchanger 21 and the upper liquid inlet of the crude argon condenser 4, a third cooling liquid pipeline 11 is fixedly connected between the second cooling liquid pipeline 10 and the upper liquid inlet of the refined argon condenser 6, a first condensate pipeline 12 is fixedly connected between the lower liquid outlet of the crude argon condenser 4 and the first upper inlet of the upper cooling tower 1, and a third cooling liquid pipeline 11 is fixedly connected between the second cooling liquid pipeline 10 and the upper liquid inlet of the refined argon condenser 6. A second condensate pipeline 13 is fixedly connected between the lower liquid outlet of the condenser 6 and the first condensate pipeline 12, a first flash steam pipeline 14 is fixedly connected between the top gas outlet of the crude argon condenser 4 and the second upper inlet of the upper cooling tower 1, a second flash steam pipeline 15 is fixedly connected between the top gas outlet of the refined argon condenser 6 and the first flash steam pipeline 14, a first crude argon pipeline 16 is fixedly connected between the lower outlet of the upper cooling tower 1 and the middle inlet of the crude argon tower 5, and a first crude argon pipeline 16 is fixedly connected between the bottom liquid outlet of the crude argon tower 5 and the A second crude argon pipeline 17 is fixedly connected between the lower liquid inlet of the upper cooling tower 1, a third crude argon pipeline 18 is fixedly connected between the upper outlet of the crude argon tower 5 and the middle inlet of the refined argon tower 7, a first refined argon pipeline 19 is fixedly connected to the bottom liquid outlet of the refined argon tower 7, a second refined argon pipeline 22 is fixedly connected between the first refined argon pipeline 19 and the second liquid inlet at the bottom of the heat exchanger 21, and a third refined argon pipeline 40 is fixedly connected between the second liquid outlet at the top of the heat exchanger 21 and the lower liquid inlet of the refined argon tower 7.

[0024] The upper cooling tower 1, the lower cooling tower 3 and the crude argon tower 5 are all plate-type distillation towers. After the device is in operation, the lower part of the upper cooling tower 1 is a gas-liquid mixture distribution area with the highest argon content.

[0025] The bottoms of the crude argon condenser 4 and the refined argon condenser 6 are both arc-shaped heads, which are beneficial to heat exchange and cooling between the crude argon condenser 4 and the crude argon tower 5 , and heat exchange and cooling between the refined argon condenser 6 and the refined argon tower 7 .

[0026] The compressed air is cooled by the lower cooling tower 3. After the minimum process liquid level is established, the coolant is condensed by the crude argon condenser 4 and the refined argon condenser 6 to establish the minimum condensate process liquid level. The flash steam and saturated condensate in the crude argon condenser 4 and the refined argon condenser 6 are refluxed to the upper cooling tower 1 to provide circulating cooling capacity for the upper cooling tower 1, the main cooler 2, and the lower cooling tower 3, thereby reducing the production cost for the operation of the device. At the same time, the crude argon tower 5 and the refined argon tower 7 can simultaneously distill the argon-rich gas-liquid mixture in the lower part of the upper cooling tower 1 to obtain a high-concentration liquid argon product. The lower cooling tower 3, the crude argon condenser 4, the crude argon tower 5, the refined argon condenser 6, and the refined argon tower 7 can simultaneously establish the minimum process liquid level required by the device, and ultimately shorten the crude argon production time to 3 hours. The oxygen supply of the device is increased from 70,000 N m 3 / h increased to 80000N m 3 / h, thus improving the production efficiency of the device.

[0027] The above-mentioned air separation unit that can quickly resume full load operation can be further optimized and / or improved according to actual needs:

[0028] As attached Figure 1 As shown, a crude argon pump 20 is fixedly installed on the second crude argon pipeline 17 .

[0029] As attached Figure 1 As shown, a heat medium pipe line 41 is provided in the heat exchanger 21 , the outlet of the first coolant pipeline 39 is fixedly connected to the inlet of the heat medium pipe line 41 , and the outlet of the heat medium pipe line 41 is fixedly connected to the inlet of the second cooling pipeline 10 .

[0030] As attached Figure 1 As shown, a cold medium pipe 42 is provided in the heat exchanger 21 , the outlet of the second refined argon pipeline 22 is fixedly connected to the inlet of the heat exchange cold medium pipe 42 , and the outlet of the cold medium pipe 42 is fixedly connected to the inlet of the third refined argon pipeline 40 .

[0031] As required, the cooling medium in the second refined argon pipeline 22 can cool the first cooling liquid pipeline 39 through the heat exchanger 21, thereby reducing the gas-liquid mixture in the first cooling liquid pipeline 39 and providing sustainable circulating cooling capacity for the gas to fully condense into liquid.

[0032] As attached Figure 1 As shown, the third crude argon pipeline 18 is fixedly connected to a first discharge pipeline 23 .

[0033] As attached Figure 1 As shown, the upper part of the refined argon tower 7 is fixedly connected with a second discharge pipeline 24 .

[0034] As required, before the process system of the device is started, the non-condensable gas in the crude argon column 5 and the refined argon column 7 can be discharged through the third crude argon pipeline 18, the first discharge pipeline 23, and the second discharge pipeline 24 to increase the concentration of the liquid argon product.

[0035] As attached Figure 1 As shown, a first liquid level gauge 25 is provided on the lower cooling tower 3, a second liquid level gauge 26 is provided on the crude argon tower 5, a third liquid level gauge 27 is provided on the refined argon tower 7, a fourth liquid level gauge 28 is provided on the crude argon condenser 4, and a fifth liquid level gauge 29 is provided on the refined argon condenser 6.

[0036] As needed, the first liquid level gauge 25, the second liquid level gauge 26, the third liquid level gauge 27, the fourth liquid level gauge 28, and the fifth liquid level gauge 29 can be used to determine whether the lower cooling tower 3, the crude argon tower 5, the refined argon tower 7, the crude argon condenser 4, and the refined argon condenser 6 have reached the required process liquid level of the device.

[0037] As attached Figure 1 As shown, a first control valve 30 is fixedly installed on the second coolant pipeline 10 between the third coolant pipeline 11 and the upper liquid inlet of the crude argon condenser 4, a second control valve 31 is fixedly installed on the third coolant pipeline 11, a third control valve 32 is fixedly installed on the first condensate pipeline 12 between the lower liquid outlet of the crude argon condenser 4 and the second condensate pipeline 13, a fourth control valve 33 is fixedly installed on the second condensate pipeline 13, a fifth control valve 34 is fixedly installed on the first flash steam pipeline 14 between the top gas outlet of the crude argon condenser 4 and the second flash steam pipeline 15, a sixth control valve 35 is fixedly installed on the second flash steam pipeline 15, a seventh control valve 36 is fixedly installed on the second crude argon pipeline 17 between the bottom liquid outlet of the crude argon tower 5 and the crude argon pump 20, and an eighth control valve 37 is fixedly installed on the third crude argon pipeline 18 between the first discharge pipeline 23 and the middle inlet of the refined argon tower 7.

[0038] As attached Figure 1 As shown, the device also includes a controller, and the first liquid level gauge 25, the second liquid level gauge 26, the third liquid level gauge 27, the first control valve 30, the second control valve 31, the third control valve 32, the fourth control valve 33, the fifth control valve 34, the sixth control valve 35, the seventh control valve 36, and the eighth control valve 37 are all electrically connected to the controller.

[0039] According to the needs, the pipelines and equipment of the air separation unit that quickly resumes full-load operation can also be equipped with conventional valves, thermometers and pressure gauges known in the art according to production needs. The controller is a DCS controller, and the model of the DCS controller can be the CS3000 controller produced by Yokogawa Corporation of Japan.

[0040] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

[0041] The use process of the embodiment of the utility model is as follows: first, the non-condensable gas in the crude argon tower 5 and the refined argon tower 7 is emptied through the third crude argon pipeline 18, the first discharge pipeline 23, and the second discharge pipeline 24; then, the compressed air enters the lower cooling tower 3 through the compressed air pipeline 38 for cooling and liquefaction. When the coolant at the bottom of the lower cooling tower 3 reaches the required minimum process liquid level, the coolant enters the crude argon condenser 4 and the refined argon condenser 6 through the first coolant pipeline 39, the second coolant pipeline 10, and the third coolant pipeline 11 for condensation. When the condensate at the bottom of the crude argon condenser 4 and the refined argon condenser 6 reaches the required minimum process liquid level, the flash steam at the upper part of the crude argon condenser 4 and the refined argon condenser 6 enters the upper cooling tower 1 through the first flash steam pipeline 14 and the second flash steam pipeline 15. The flash steam is cooled in the upper cooling tower 1. The cooling and liquefaction continues in the tower 1, and the saturated condensate in the lower part of the crude argon condenser 4 and the refined argon condenser 6 enters the upper cooling tower 1 through the first condensate pipeline 12 and the second condensate pipeline 13, providing circulating cooling capacity for the upper cooling tower 1, the main cooler 2, and the lower cooling tower 3; at the same time, the main cooler 2 cools the compressed air to the low-temperature boiling point of nitrogen and oxygen, and the liquid nitrogen enters the downstream process system through the liquid nitrogen pipeline 8, and the liquid oxygen enters the downstream process system through the liquid oxygen pipeline 9; at the same time, the argon-rich gas-liquid mixture in the lower part of the upper cooling tower 1 enters the crude argon tower 5 through the second crude argon pipeline 17 for distillation, and the argon-rich distilled gas at the top of the crude argon tower 5 enters the refined argon tower 7 through the third crude argon pipeline 18 for further distillation, and finally the high-concentration liquid argon at the bottom of the refined argon tower 7 enters the downstream production process system through the first refined argon pipeline 19.

Claims

1. An air separation unit that can quickly resume full load operation, characterized in that The utility model comprises an upper cooling tower, a main cooler, a lower cooling tower, a crude argon condenser, a crude argon tower, a refined argon condenser, a refined argon tower and a heat exchanger. The upper cooling tower, the main cooler and the lower cooling tower are fixedly connected in sequence. The first liquid outlet of the main cooler is fixedly connected with a liquid nitrogen pipeline, the second liquid outlet of the main cooler is fixedly connected with a liquid oxygen pipeline, the middle air inlet of the lower cooling tower is fixedly connected with a compressed air pipeline, the bottom liquid outlet of the lower cooling tower and the first liquid inlet at the bottom of the heat exchanger are fixedly connected with a first cooling liquid pipeline, the first liquid outlet at the top of the heat exchanger and the upper liquid inlet of the crude argon condenser are fixedly connected with a second cooling liquid pipeline, the second cooling liquid pipeline and the upper liquid inlet of the refined argon condenser are fixedly connected with a third cooling liquid pipeline, the lower liquid outlet of the crude argon condenser and the first upper inlet of the upper cooling tower are fixedly connected with a first condensate pipeline, the lower liquid outlet of the refined argon condenser is fixedly connected with a first condensate pipeline, and the lower liquid outlet of the refined argon condenser is fixedly connected with a first condensate pipeline. A second condensate pipeline is fixedly connected between the outlet and the first condensate pipeline, a first flash steam pipeline is fixedly connected between the top gas outlet of the crude argon condenser and the second upper inlet of the upper cooling tower, a second flash steam pipeline is fixedly connected between the top gas outlet of the refined argon condenser and the first flash steam pipeline, a first crude argon pipeline is fixedly connected between the lower outlet of the upper cooling tower and the middle inlet of the crude argon tower, a second crude argon pipeline is fixedly connected between the bottom liquid outlet of the crude argon tower and the lower liquid inlet of the upper cooling tower, a third crude argon pipeline is fixedly connected between the upper outlet of the crude argon tower and the middle inlet of the refined argon tower, the first refined argon pipeline is fixedly connected between the bottom liquid outlet of the refined argon tower, the second refined argon pipeline is fixedly connected between the first refined argon pipeline and the second liquid inlet at the bottom of the heat exchanger, and the third refined argon pipeline is fixedly connected between the second liquid outlet at the top of the heat exchanger and the lower liquid inlet of the refined argon tower.

2. The air separation unit for rapid recovery of full load operation according to claim 1, characterized in that A crude argon pump is fixedly installed on the second crude argon pipeline.

3. The air separation unit for rapid recovery of full load operation according to claim 1 or 2, characterized in that A heat medium pipe line is arranged in the heat exchanger, the outlet of the first cooling liquid pipeline is fixedly connected with the inlet of the heat medium pipe line, and the outlet of the heat medium pipe line is fixedly connected with the inlet of the second cooling pipeline.

4. The air separation unit for rapid recovery of full load operation according to claim 3, characterized in that A cold medium pipe line is arranged in the heat exchanger, the outlet of the second refined argon pipeline is fixedly connected with the inlet of the heat exchange cold medium pipe line, and the outlet of the cold medium pipe line is fixedly connected with the inlet of the third refined argon pipeline.

5. The air separation unit for rapid recovery of full load operation according to claim 1, 2 or 4, characterized in that The third crude argon pipeline is fixedly connected to a first discharge pipeline.

6. The air separation unit for rapid recovery of full load operation according to claim 5, characterized in that The upper part of the refined argon tower is fixedly connected with a second discharge pipeline.

7. The air separation unit for rapid recovery of full load operation according to claim 6, characterized in that A first liquid level gauge is provided on the lower cooling tower, a second liquid level gauge is provided on the crude argon tower, a third liquid level gauge is provided on the refined argon tower, a fourth liquid level gauge is provided on the crude argon condenser, and a fifth liquid level gauge is provided on the refined argon condenser.

8. The air separation unit for rapid recovery of full load operation according to claim 6 or 7, characterized in that A first control valve is fixedly installed on the second coolant pipeline between the third coolant pipeline and the upper liquid inlet of the crude argon condenser, a second control valve is fixedly installed on the third coolant pipeline, a third control valve is fixedly installed on the first condensate pipeline between the lower liquid outlet of the crude argon condenser and the second condensate pipeline, a fourth control valve is fixedly installed on the second condensate pipeline, a fifth control valve is fixedly installed on the first flash steam pipeline between the top gas outlet of the crude argon condenser and the second flash steam pipeline, a sixth control valve is fixedly installed on the second flash steam pipeline, a seventh control valve is fixedly installed on the second crude argon pipeline between the bottom liquid outlet of the crude argon tower and the crude argon pump, and an eighth control valve is fixedly installed on the third crude argon pipeline between the first discharge pipeline and the middle inlet of the refined argon tower.

9. The air separation unit for rapid recovery of full load operation according to claim 8, characterized in that It also includes a controller, and the first liquid level gauge, the second liquid level gauge, the third liquid level gauge, the fourth liquid level gauge, the fifth liquid level gauge, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the sixth control valve, the seventh control valve, and the eighth control valve are all electrically connected to the controller.

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