Liquid oxygen filling system

Abstract

The utility model belongs to a filling system for liquid oxygen. Comprising a rectifying tower, a liquid phase outlet of the rectifying tower is respectively connected with an industrial liquid oxygen filling unit and a medical liquid oxygen filling unit through a subcooler, the medical liquid oxygen filling unit at least comprises a medical liquid oxygen storage tank, and an inlet of the medical liquid oxygen storage tank is connected with an outlet of the subcooler through a medical oxygen valve. An outlet of the medical liquid oxygen storage tank is connected with the filling part, a recycling outlet of the medical liquid oxygen storage tank is connected with the industrial liquid oxygen filling unit, and a liquid oxygen purity detector is further arranged on the medical liquid oxygen storage tank; the device is simple in structure and reasonable in design, and can ensure the quality of medical oxygen on the basis of preventing environmental pollution and reducing the production cost of the medical oxygen.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid-phase gas filling, in particular to a liquid oxygen filling system. Background Art

[0002] Liquid oxygen filling generally includes industrial liquid oxygen filling and medical liquid oxygen filling. The technical solution adopted by the conventional liquid oxygen filling system is: the liquid oxygen output equipment is connected to the industrial liquid oxygen filling part and the medical liquid oxygen filling part in parallel, so as to achieve the purpose of filling them separately; but in the actual filling process, medical liquid oxygen has higher requirements on the purity of liquid oxygen. Based on this, when the medical liquid oxygen filling is unqualified, the unqualified medical liquid oxygen needs to be processed. The conventional processing methods include: 1. Directly venting, which has the defects of high production cost and the risk of environmental pollution; 2. Re-sending the medical liquid oxygen to the purification equipment for purification and then sending it to the medical liquid oxygen filling equipment for filling, which has the defect of high production cost. Utility Model Content

[0003] The utility model aims to provide a liquid oxygen filling system to overcome the defects in the prior art.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A liquid oxygen filling system, the system comprises a distillation tower, the liquid phase outlet of the distillation tower is connected to an industrial liquid oxygen filling unit and a medical liquid oxygen filling unit respectively through a supercooler, the medical liquid oxygen filling unit comprises at least a medical liquid oxygen storage tank, the inlet of the medical liquid oxygen storage tank is connected to the outlet of the supercooler through a medical oxygen valve, the outlet of the medical liquid oxygen storage tank is connected to a filling part, the recycling outlet of the medical liquid oxygen storage tank is connected to the industrial liquid oxygen filling unit, and a liquid oxygen purity detector is also provided on the medical liquid oxygen storage tank.

[0006] The beneficial effects of the utility model are as follows: the utility model is an improvement made based on the existing filling system, by setting a medical liquid oxygen storage tank, and setting a liquid oxygen purity detector and a recycling outlet of the medical liquid oxygen storage tank on the medical liquid oxygen storage tank, so as to detect the purity of the liquid oxygen in the medical liquid oxygen storage tank, when it meets the requirements of medical liquid oxygen, it can be filled through the filling part, and when it does not meet the requirements of medical liquid oxygen, it can be transported to the industrial liquid oxygen filling unit through the recycling outlet of the medical liquid oxygen storage tank and used as industrial liquid oxygen; further, in actual use, the medical liquid oxygen storage tank is used for medical liquid A temporary storage device for oxygen, which stores a large amount of medical liquid oxygen and tests it; when it meets the requirements of medical liquid oxygen, it is sealed (medical liquid oxygen is allowed to be filled, and external medical liquid oxygen is not allowed to enter), and it is refilled after the medical liquid oxygen is used up to ensure the purity of the medical liquid oxygen; the liquid oxygen purity detector can detect the medical liquid oxygen in the medical liquid oxygen storage tank at any time, and when it is found that the purity does not meet the requirements, it can be transported to the industrial liquid oxygen filling unit in time; it has a simple structure, reasonable design, and can ensure the quality of medical oxygen on the basis of preventing environmental pollution and reducing the production cost of medical oxygen.

[0007] Preferably, the industrial liquid oxygen filling unit includes an industrial liquid oxygen storage tank, the inlet of the industrial liquid oxygen storage tank is connected to the outlet of the supercooler through an industrial oxygen valve, and the outlet of the industrial liquid oxygen storage tank is connected to the industrial liquid oxygen tank truck filling device through a liquid oxygen filling pump.

[0008] Preferably, the recycling outlet of the medical liquid oxygen storage tank is connected to the inlet of the industrial liquid oxygen storage tank through a circulation pipeline with a circulation valve.

[0009] Preferably, the medical liquid oxygen storage tank is provided with a liquid oxygen level gauge.

[0010] Preferably, a tee and a filling valve are provided in sequence between the outlet and the filling part of the medical liquid oxygen storage tank; the third end of the tee is connected to the self-pressurizing part of the medical liquid oxygen storage tank.

[0011] Preferably, the self-pressurizing part of the medical liquid oxygen storage tank includes a high-pressure air-temperature vaporizer, the third end of the tee is connected to the inlet of the high-pressure air-temperature vaporizer through a boosting valve, and the outlet of the high-pressure air-temperature vaporizer is connected to the top boosting inlet of the medical liquid oxygen storage tank.

[0012] Preferably, the filling section includes a medical liquid oxygen tanker filling device arranged in parallel with the filling valve and connected to a Dewar tank filling device.

[0013] Preferably, a sewage pipe with a sewage valve is provided at the bottom of the medical liquid oxygen storage tank, and the end of the sewage pipe is connected to a sewage tank.

[0014] A liquid oxygen filling system is made according to the above scheme. The utility model is used for filling industrial liquid oxygen and medical liquid oxygen. It is essentially a transformation of the traditional liquid oxygen filling system. A medical liquid oxygen storage tank that can be used to detect the purity of liquid oxygen is set in the medical liquid oxygen filling unit. When it does not meet the requirements of medical liquid oxygen, the liquid oxygen in the medical liquid oxygen storage tank is used as industrial liquid oxygen. When it meets the requirements of medical liquid oxygen, the medical liquid oxygen storage tank is packaged to ensure its quality and the purpose of medical liquid oxygen filling can be achieved at any time. Furthermore, the utility model is provided with a high-pressure air-temperature vaporizer for pressurization, which can pressurize the inside of the medical liquid oxygen storage tank according to the different equipment in the filling part, so as to meet the filling requirements. It has the advantages of simple structure, reasonable design, and can effectively reduce the production cost of liquid oxygen, prevent environmental pollution and ensure the quality of medical liquid oxygen filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] In the figure: 1. distillation tower; 2. subcooler; 3. medical liquid oxygen storage tank; 4. medical oxygen valve; 5. liquid oxygen purity detector; 6. industrial liquid oxygen storage tank; 7. industrial oxygen valve; 8. liquid oxygen filling pump; 9. industrial liquid oxygen tanker filling device; 10. circulation valve; 11. liquid oxygen level gauge; 12. tee; 13. filling valve; 14. high-pressure air temperature vaporizer; 15 booster valve; 16. medical liquid oxygen tanker filling device; 17. Dewar tank filling device; 18. sewage valve; 19. sewage tank. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] Reference Figure 1As shown, a liquid oxygen filling system comprises a distillation tower 1, wherein the liquid phase outlet of the distillation tower 1 is respectively connected to an industrial liquid oxygen filling unit and a medical liquid oxygen filling unit through a supercooler 2, wherein the medical liquid oxygen filling unit comprises at least a medical liquid oxygen storage tank 3, wherein the inlet of the medical liquid oxygen storage tank 3 is connected to the outlet of the supercooler 2 through a medical oxygen valve 4, wherein the outlet of the medical liquid oxygen storage tank 3 is connected to a filling part, wherein the recycling outlet of the medical liquid oxygen storage tank 3 is connected to the industrial liquid oxygen filling unit, and a liquid oxygen purity detector 5 is also provided on the medical liquid oxygen storage tank 3. Liquid oxygen is produced in the distillation tower 1 described in the utility model, and then is supercooled by the supercooler 2, and is respectively filled with industrial liquid oxygen and medical liquid oxygen by the industrial liquid oxygen filling unit and the medical liquid oxygen filling unit. According to common knowledge, the purity requirement of medical liquid oxygen is higher than that of industrial liquid oxygen. The purity requirements of medical liquid oxygen products are oxygen ≥ 99.5%, carbon monoxide < 0.0005%, carbon dioxide < 0.03%, and water content < 0.0067%. Due to factors such as raw materials, process parameters and process flow design, the purity of liquid oxygen will vary, resulting in some products being The product may not meet the purity requirements of medical liquid oxygen products; the utility model arranges a liquid oxygen purity detector 5 on the medical liquid oxygen storage tank 3, so that the liquid oxygen purity detector 5 monitors the purity of the liquid oxygen in the medical liquid oxygen storage tank 3 in real time. When it meets the requirements, it can be used as medical liquid oxygen to fill the corresponding filling part; if it does not meet the requirements, it can enter the industrial liquid oxygen filling unit through the recycling outlet of the medical liquid oxygen storage tank 3 and be used as industrial liquid oxygen; the above method can avoid the discharge of unqualified medical liquid oxygen or re-purification as raw material, so as to realize the effective utilization of liquid oxygen resources and reduce the production cost of liquid oxygen.

[0019] Furthermore, the industrial liquid oxygen filling unit comprises an industrial liquid oxygen storage tank 6, the inlet of the industrial liquid oxygen storage tank 6 is connected to the outlet of the supercooler 2 via an industrial oxygen valve 7, and the outlet of the industrial liquid oxygen storage tank 6 is connected to the industrial liquid oxygen tanker filling device 9 via a liquid oxygen filling pump 8. The utility model can temporarily store not only the liquid oxygen from the distillation tower 1, but also the unqualified medical liquid oxygen from the medical liquid oxygen storage tank 3 by setting the industrial liquid oxygen storage tank 6; and can facilitate the filling of industrial liquid oxygen.

[0020] Furthermore, the recycling outlet of the medical liquid oxygen storage tank 3 is connected to the inlet of the industrial liquid oxygen storage tank 6 through a circulation pipeline with a circulation valve 10. The recycling outlet of the medical liquid oxygen storage tank 3 described in the utility model is connected to the inlet of the industrial liquid oxygen storage tank 6 to achieve the characteristic of facilitating later filling.

[0021] Furthermore, the medical liquid oxygen storage tank 3 is provided with a liquid oxygen level gauge 11. The medical liquid oxygen storage tank 3 described in the utility model is provided with a liquid oxygen level gauge 11, which can seal the medical liquid oxygen storage tank 3 after the liquid oxygen reaches a certain liquid level. The sealing can be used to fill the medical liquid oxygen, and during the sealing period, the liquid oxygen in the distillation tower is prevented from entering the medical liquid oxygen storage tank 3, thereby avoiding the problem of affecting the quality of the liquid oxygen in the medical liquid oxygen storage tank 3.

[0022] Furthermore, a three-way valve 12 and a filling valve 13 are provided between the outlet and the filling part of the medical liquid oxygen storage tank 3 in sequence; the third end of the three-way valve 12 is connected to the self-pressurizing part of the medical liquid oxygen storage tank. By providing the self-pressurizing part of the medical liquid oxygen storage tank, the internal of the medical liquid oxygen storage tank 3 can be pressurized to meet the corresponding filling requirements.

[0023] Furthermore, the self-pressurizing part of the medical liquid oxygen storage tank includes a high-pressure air-temperature vaporizer 14, the third end of the three-way 12 is connected to the inlet of the high-pressure air-temperature vaporizer 14 through a boosting valve 15, and the outlet of the high-pressure air-temperature vaporizer 14 is connected to the top boosting inlet of the medical liquid oxygen storage tank 3.

[0024] Furthermore, the filling part includes a medical liquid oxygen tanker filling device 16 arranged in parallel with the filling valve 13 and connected to a Dewar tank filling device 17 .

[0025] Furthermore, a drainage pipe with a drainage valve 18 is provided at the bottom of the medical liquid oxygen storage tank 3, and the end of the drainage pipe is connected to a drainage tank 19. When a small amount of remaining liquid oxygen cannot enter the industrial liquid oxygen filling unit or be filled, it can be sent to the drainage tank 19 through the drainage pipe with the drainage valve 18.

[0026] The working principle of the utility model is as follows: the low-temperature liquid oxygen extracted from the distillation tower 1 described in the air separation device is supercooled by the supercooler 2 and can be sent to the industrial liquid oxygen filling unit and / or the medical liquid oxygen filling unit according to actual conditions; when liquid oxygen needs to be sent to the medical liquid oxygen filling unit, the medical oxygen valve 4 is opened, and the liquid oxygen continuously enters the medical liquid oxygen storage tank 3. When the liquid oxygen level gauge 11 shows that the liquid level in the medical liquid oxygen storage tank 3 is 80% or above, the medical oxygen valve 4 is closed; the purity of the liquid oxygen in the medical liquid oxygen storage tank 3 is detected by the liquid oxygen purity detector 5, and the purity of the medical liquid oxygen is oxygen ≥99.5%, carbon monoxide <0.0005%, carbon dioxide <0.03%, and water content <0.0067%; when the liquid oxygen meets the above standards, the medical liquid oxygen storage tank 3 is Packaging is performed; when liquid oxygen needs to be filled into the filling part for sale, the self-pressurizing part of the medical liquid oxygen storage tank is opened. Specifically, when liquid oxygen needs to be filled into the medical liquid oxygen tank truck filling device 16, the boosting valve 15 is opened, and the liquid oxygen is vaporized through the high-pressure air temperature vaporizer 14 and sent into the medical liquid oxygen storage tank 3, so that the pressure in the medical liquid oxygen storage tank 3 reaches above 0.6MPa, which meets the filling pressure of the liquid oxygen tank truck, and the filling device 16 of the medical liquid oxygen tank truck is used for filling; when liquid oxygen needs to be filled into the Dewar tank filling device 17, the boosting valve 15 is opened, and the liquid oxygen is vaporized through the high-pressure air temperature vaporizer 14 and sent into the medical liquid oxygen storage tank 3, so that the pressure in the medical liquid oxygen storage tank 3 reaches above 1.2MPa, which meets the filling pressure of the liquid oxygen tank truck, and the filling device 17 of the Dewar tank is used for filling. When the liquid oxygen in the medical liquid oxygen storage tank 3 does not meet the liquid oxygen standard, the circulation valve 10 is opened to allow the medical liquid oxygen that does not meet the standard in the medical liquid oxygen storage tank 3 to enter the industrial liquid oxygen storage tank 6. When liquid oxygen needs to be sent to the industrial liquid oxygen filling unit, first, it is determined whether there is liquid oxygen in the industrial liquid oxygen storage tank 6. When there is liquid oxygen in the industrial liquid oxygen storage tank 6, it can be pressurized by the liquid oxygen filling pump 8 and then sent to the industrial liquid oxygen tanker filling device 9 for filling; when there is no liquid oxygen in the industrial liquid oxygen storage tank 6, it is determined to use the unqualified medical liquid oxygen in the medical liquid oxygen storage tank 3 or the liquid oxygen supplied by the distillation tower 1, and the unqualified medical liquid oxygen in the medical liquid oxygen storage tank 3 is preferably used. The specific process is as follows: the medical liquid oxygen storage tank 3 The unqualified medical liquid oxygen enters the industrial liquid oxygen storage tank 6 through the recycling outlet of the medical liquid oxygen storage tank 3 and the circulation valve 10, and is finally sent to the industrial liquid oxygen tanker filling device 9 for filling after being pressurized by the liquid oxygen filling pump 8; when there is no unqualified medical liquid oxygen in the medical liquid oxygen storage tank 3, the low-temperature liquid oxygen extracted from the distillation tower 1 enters the industrial liquid oxygen storage tank 6 through the supercooler 2 and the industrial oxygen valve 7, and is finally sent to the industrial liquid oxygen tanker filling device 9 for filling after being pressurized by the liquid oxygen filling pump 8. It has the characteristics of simple structure, reasonable design, and can effectively reduce the production cost of liquid oxygen, prevent environmental pollution, and ensure the quality of medical liquid oxygen filling.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filling system for liquid oxygen, the system comprising a distillation tower (1), characterized in that: The liquid phase outlet of the distillation tower (1) is connected to an industrial liquid oxygen filling unit and a medical liquid oxygen filling unit respectively through a subcooler (2). The medical liquid oxygen filling unit at least comprises a medical liquid oxygen storage tank (3), the inlet of the medical liquid oxygen storage tank (3) is connected to the outlet of the supercooler (2) through a medical oxygen valve (4), the outlet of the medical liquid oxygen storage tank (3) is connected to the filling part, the recycling outlet of the medical liquid oxygen storage tank (3) is connected to the industrial liquid oxygen filling unit, and the medical liquid oxygen storage tank (3) is also provided with a liquid oxygen purity detector (5).

2. A liquid oxygen filling system according to claim 1, characterized in that: The industrial liquid oxygen filling unit comprises an industrial liquid oxygen storage tank (6), the inlet of the industrial liquid oxygen storage tank (6) is connected to the outlet of the subcooler (2) via an industrial oxygen valve (7), and the outlet of the industrial liquid oxygen storage tank (6) is connected to the industrial liquid oxygen tank truck filling device (9) via a liquid oxygen filling truck pump (8).

3. A liquid oxygen filling system according to claim 2, characterized in that: The recycling outlet of the medical liquid oxygen storage tank (3) is connected to the inlet of the industrial liquid oxygen storage tank (6) via a circulation pipeline with a circulation valve (10).

4. A liquid oxygen filling system according to claim 1, characterized in that: The medical liquid oxygen storage tank (3) is provided with a liquid oxygen level meter (11).

5. A liquid oxygen filling system according to claim 1, characterized in that: A tee (12) and a filling valve (13) are provided in sequence between the outlet and the filling part of the medical liquid oxygen storage tank (3); the third end of the tee (12) is connected to the self-pressurizing part of the medical liquid oxygen storage tank.

6. A liquid oxygen filling system according to claim 5, characterized in that: The self-pressurizing part of the medical liquid oxygen storage tank comprises a high-pressure air-temperature vaporizer (14); the third end of the three-way (12) is connected to the inlet of the high-pressure air-temperature vaporizer (14) through a boosting valve (15); and the outlet of the high-pressure air-temperature vaporizer (14) is connected to the top boosting inlet of the medical liquid oxygen storage tank (3).

7. A liquid oxygen filling system according to claim 1 or 5, characterized in that: The filling section comprises a medical liquid oxygen tanker filling device (16) arranged in parallel with a filling valve (13) and connected to a Dewar tank filling device (17).

8. A liquid oxygen filling system according to claim 1, characterized in that: A sewage pipe with a sewage valve (18) is provided at the bottom of the medical liquid oxygen storage tank (3), and the end of the sewage pipe is connected to a sewage tank (19).

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