Air fractionation equipment

Abstract

The utility model discloses air fractionation equipment, an air fractionation tower is a key device used for separating air into composition gas, the air fractionation equipment comprises the air fractionation tower and an air fractionation circulating water pool, a heat exchanger is further arranged in the air fractionation circulating water pool, and the heat exchanger is connected with the air fractionation tower through a pipeline. Due to the fact that the heat exchanger is designed in the air fractionation circulating water pool, the cooling capacity of uncollected gas or liquid can be effectively utilized, cooled water in the air fractionation circulating water pool is conveyed to equipment needing to be cooled, and the equipment is cooled; due to the design of the heat exchanger, a residual liquid evaporator and an air blower are omitted, so that equipment faults caused by faults of the air blower are avoided, and meanwhile, electric energy is saved due to the fact that the air blower is omitted.

Description

Technical Field

[0001] The utility model relates to the technical field of air fractionation, in particular to air fractionation equipment. Background Art

[0002] The air distillation tower is a key equipment used to separate air into its component gases (such as oxygen, nitrogen, argon, etc.). This process is usually called air distillation. It is mainly based on the difference in boiling points of different gas components to perform distillation, that is, the required gases are separated in the distillation tower according to the difference in boiling points.

[0003] After obtaining the required gas, the current air distillation tower will gasify and discharge the uncollected gas or liquid through pipes and residual liquid evaporators with blowers. In this process, a lot of cold energy is lost in vain due to direct discharge. At the same time, since the existing residual liquid evaporator needs a blower to cooperate during the evaporation process, once the blower fails, it will cause problems in the operation of the entire air distillation tower; at the same time, the blower also consumes electricity during its operation. Utility Model Content

[0004] The utility model aims to provide an air fractionation device to solve the problem that the cold capacity of the gas or liquid not collected by the current air fractionation tower is not collected and reused; currently the residual liquid evaporator still needs a blower for evaporation, which brings about the problems of increased energy consumption and increased failure rate.

[0005] In order to solve the above problems, the utility model provides an air fractionation device, including an air fractionation tower and an air fractionation circulating water pool, in which a heat exchanger is also arranged, and the heat exchanger is connected to the air fractionation tower through a pipeline.

[0006] Furthermore, the air fractionation tower is also provided with a plurality of gas-liquid discharge valves, the gas-liquid discharge valves are connected to the air fractionation tower via pipelines, and the gas-liquid discharge valves are used to discharge gas and / or liquid to the heat exchanger.

[0007] Furthermore, the gas-liquid discharge valve comprises a gas discharge valve and a liquid discharge valve, wherein the gas discharge valve is located at the upper part of the air fractionation tower, and the liquid discharge valve is located at the lower part of the air fractionation tower.

[0008] Furthermore, the gas-liquid discharge valve is provided with a manual valve switch, and the manual valve switch is used to control the closing of the gas-liquid discharge valve and control the opening degree of the gas-liquid discharge valve.

[0009] Furthermore, a low-temperature buffer tank is provided between the gas-liquid discharge valve and the heat exchanger, and the low-temperature buffer tank is used to collect the gas-liquid mixture discharged from each gas-liquid discharge valve; the low-temperature buffer tank is connected to the gas-liquid discharge valve through a pipeline, and the low-temperature buffer tank is connected to the heat exchanger through a pipeline.

[0010] Furthermore, a heat exchanger inlet valve is provided between the low-temperature buffer tank and the heat exchanger, and the heat exchanger inlet valve is used to control whether the gas-liquid mixture in the low-temperature buffer tank enters the heat exchanger; the heat exchanger inlet valve is connected to the low-temperature buffer tank through a pipeline, and the heat exchanger inlet valve is connected to the heat exchanger through a pipeline.

[0011] Furthermore, a manual switch is also provided on the heat exchanger inlet valve.

[0012] Furthermore, the heat exchanger is also connected to a heat exchanger outlet valve, and the heat exchanger outlet valve is connected to the heat exchanger through a pipeline.

[0013] Furthermore, a manual switch is also provided on the heat exchanger outlet valve.

[0014] Furthermore, the air fractionation circulating water pool is connected to a circulating water pool pump for transporting the air fractionation circulating water pool to a corresponding place to cool the equipment.

[0015] The beneficial effects of the air fractionation equipment provided by the utility model are as follows: compared with the prior art, since a heat exchanger is designed in the air fractionation circulating water pool, the coldness of the gas or liquid that is not collected can be effectively utilized, and the cooled water in the air fractionation circulating water pool is transported to the equipment that needs to be cooled, so as to cool the equipment; since the heat exchanger is designed, the residual liquid evaporator is eliminated, and thus the blower is also eliminated, thereby avoiding the failure of the blower to cause a failure of the air fractionation equipment, and at the same time, eliminating the blower also saves electric energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of air fractionation equipment.

[0017] Figure markings: 1-air fractionation tower, 2-air fractionation circulating water pool, 21-circulating water pool pump, 3-heat exchanger, 41-gas discharge valve, 42-liquid discharge valve, 5-low temperature buffer tank, 6-heat exchanger inlet valve, 7-heat exchanger outlet valve. DETAILED DESCRIPTION

[0018] In order to better understand the purpose, structure and function of the utility model, the following Figure 1, an air fractionation device of the utility model is further described in detail.

[0019] like Figure 1 As shown, an air fractionation device of an embodiment of the utility model includes an air fractionation tower 1 and an air fractionation circulating water pool 2, in which liquid water for recycling is stored. A heat exchanger 3 is also provided in the air fractionation circulating water pool 2, and the heat exchanger 3 is connected to the air fractionation tower 1 through a pipeline.

[0020] The working principle of the air fractionator is based on physical separation technology, which uses the different boiling points of different components in the air at different temperatures to separate the different components in the mixed gas. In the process of separating the required gas, the air fractionator also needs to discharge the uncollected gas and liquid.

[0021] In order to better collect the previously uncollected gas and liquid, a low-temperature buffer tank 5 is provided in the air fractionation device, and the low-temperature buffer tank 5 is used to temporarily store the uncollected gas and liquid discharged from the air fractionation tower. Therefore, the gas outlet end of the low-temperature buffer tank 5 is connected to the heat exchanger 3, and the gas inlet end of the low-temperature buffer tank 5 is connected to the air fractionation tower 1.

[0022] In the utility model, in order to be able to control the discharge of gas and liquid from the air distillation tower 1, a gas-liquid discharge valve is also provided between the air distillation tower 1 and the air inlet end of the low-temperature buffer tank 5, and these gas-liquid discharge valves are provided with manual valve switches. Among them, the gas-liquid discharge valve includes a gas discharge valve 41 and a liquid discharge valve 42. Since the gas mainly exists in the upper part of the air distillation tower 1, and the liquid mainly exists in the lower part of the air distillation tower 1. Therefore, the gas discharge valve 41 is provided at the upper part of the air distillation tower 1 to control the discharge of gas in the air distillation tower 1; the liquid discharge valve 42 is located at the lower part of the air distillation tower 1 to control the discharge of liquid in the air distillation tower 1. Under normal circumstances, the valve maintains a certain degree of opening and closing so that the discharge is at a normal level. Once a special situation occurs and the valve needs to be closed urgently, the valve can be closed by a manual valve switch to suspend the discharge of gas or liquid.

[0023] In addition, a valve, namely, a heat exchanger inlet valve 6, is also provided between the low-temperature buffer tank 5 and the heat exchanger 3, and a manual switch is also provided on the heat exchanger inlet valve 6. The heat exchanger inlet valve 6 is used to control whether the gas-liquid mixture in the low-temperature buffer tank 5 can enter the heat exchanger 3. At the same time, the heat exchanger inlet valve 6 is connected to the outlet of the low-temperature buffer tank 5 through a pipeline, and the heat exchanger inlet valve 6 is connected to the inlet of the heat exchanger 3 through a pipeline. When it is necessary to transport gas and / or liquid to the heat exchanger 3, the valve is opened so that the gas and / or liquid can enter the heat exchanger 3 for cooling the water in the pool. When it is not necessary to transport gas and / or liquid to the heat exchanger 3, the low-temperature buffer tank 5 can be closed to block the gas and / or liquid from entering the heat exchanger 3. The manual switch on the heat exchanger inlet valve 6 can be used to manually close the valve in an emergency to maintain the safety of the equipment and facilities.

[0024] In the utility model, in order to allow the gas and liquid to exchange more heat in the heat exchanger 3, a heat exchanger outlet valve 7 is also connected to the outlet end of the heat exchanger 3. At the same time, the heat exchanger outlet valve 7 is connected to the heat exchanger 3 through a pipeline. The heat exchanger outlet valve 7 can control the speed of gas discharge from the heat exchanger 3 by opening and closing. After entering the heat exchanger 3 for heat exchange, the gas and liquid will mostly be vaporized into gas. When more heat exchange is required between the gas and liquid, the opening and closing degree of the heat exchanger outlet valve 7 can be smaller. When the gas needs to be discharged as soon as possible, the opening and closing degree of the heat exchanger outlet valve 7 can be increased to maximize the use of cold. If an emergency situation requires closing or opening the valve, it can also be operated by a manual switch.

[0025] The air fractionation circulating water pool 2 is also connected to a circulating water pool pump 21, which can deliver the water cooled by the heat exchanger 3 to the equipment that needs cooling, thereby making full use of the cooling capacity and saving energy. At the same time, the water cooled by the equipment is delivered back to the air fractionation circulating water pool 2 for cooling again. This cycle is repeated, and the cooling capacity of the gas and liquid that are not collected can be utilized to the maximum extent to cool other equipment, thereby achieving the purpose of energy saving.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air fractionation device, characterized in that: The invention comprises an air fractionation tower (1) and an air fractionation circulating water pool (2), wherein a heat exchanger (3) is also arranged in the air fractionation circulating water pool (2), and the heat exchanger (3) is connected to the air fractionation tower (1) through a pipeline.

2. The air fractionation device according to claim 1, characterized in that: The air fractionation tower (1) is also provided with a plurality of gas-liquid discharge valves, which are connected to the air fractionation tower (1) via pipelines, and are used to discharge gas and / or liquid to the heat exchanger (3).

3. The air fractionation device according to claim 2, characterized in that: The gas-liquid discharge valve comprises a gas discharge valve (41) and a liquid discharge valve (42), wherein the gas discharge valve (41) is located at the upper part of the air fractionation tower (1), and the liquid discharge valve (42) is located at the lower part of the air fractionation tower (1).

4. The air fractionation device according to claim 2, characterized in that: The gas-liquid discharge valve is provided with a manual valve switch, and the manual valve switch is used to control the closing of the gas-liquid discharge valve and control the opening degree of the gas-liquid discharge valve.

5. The air fractionation device according to claim 2, characterized in that: A low-temperature buffer tank (5) is also provided between the gas-liquid discharge valve and the heat exchanger (3), and the low-temperature buffer tank (5) is used to collect the gas-liquid mixture discharged from each gas-liquid discharge valve; the low-temperature buffer tank (5) is connected to the gas-liquid discharge valve via a pipeline, and the low-temperature buffer tank (5) is connected to the heat exchanger (3) via a pipeline.

6. The air fractionation device according to claim 5, characterized in that: A heat exchanger inlet valve (6) is also provided between the low-temperature buffer tank (5) and the heat exchanger (3), and the heat exchanger inlet valve (6) is used to control whether the gas-liquid mixture in the low-temperature buffer tank (5) enters the heat exchanger (3); the heat exchanger inlet valve (6) is connected to the low-temperature buffer tank (5) through a pipeline, and the heat exchanger inlet valve (6) is connected to the heat exchanger (3) through a pipeline.

7. The air fractionation device according to claim 6, characterized in that: The heat exchanger inlet valve (6) is also provided with a manual switch.

8. The air fractionation device according to claim 2, characterized in that: The heat exchanger (3) is also connected to a heat exchanger outlet valve (7), and the heat exchanger outlet valve (7) is connected to the heat exchanger (3) via a pipeline.

9. The air fractionation device according to claim 8, characterized in that: The heat exchanger outlet valve (7) is also provided with a manual switch.

10. The air fractionation device according to any one of claims 1 to 9, characterized in that: The air fractionation circulating water pool (2) is connected to a circulating water pool pump (21) for transporting the air fractionation circulating water pool (2) to a corresponding place to cool the equipment.

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