Energy-saving oxygen terminal pressure dividing device for air separation equipment

Abstract

The utility model discloses an oxygen terminal pressure dividing device for energy-saving air separation equipment, which comprises an oxygen buffer tank, and a first pressure regulating valve is arranged at the rear end of the oxygen buffer tank; the rear end of the first pressure regulating valve is connected with a direct supply pipeline and a partial pressure pipeline, the direct supply pipeline is provided with a second pressure regulating valve, the rear end of the second pressure regulating valve is provided with an oxygen terminal outlet, the rear end of the partial pressure pipeline is connected with an oxygen compressor buffer tank, and the partial pressure pipeline is provided with an overflow valve; the rear end of the oxygen compressor buffer tank is connected with an oxygen supercharger, the rear end of the oxygen supercharger is connected with an oxygen storage tank, and the oxygen is conveyed to the oxygen storage tank after being supercharged by the oxygen supercharger; the rear end of the oxygen storage tank is connected with an air outlet pipeline, and the air outlet pipeline is connected with the oxygen using terminal outlet. The oxygen compressor has the advantages of being simple in structure, good in oxygen supply stability, low in energy consumption, long in service life and the like, and can be widely applied to the technical field of various industrial oxygen terminals, medical oxygen terminals and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to air separation equipment oxygen delivery device technical field, concretely relates to an energy -conserving type air separation equipment oxygen terminal partial pressure device. BACKGROUND

[0002] Air separation equipment is the air as raw material, through the compression cycle depth freezing method air becomes liquid, again through rectification and from liquid air gradually separates production oxygen, nitrogen and argon etc. inert gas equipment. Air separation equipment is PSA pressure swing adsorption as the main equipment in industrial production, pressure swing adsorption air separation equipment has simple process flow, high degree of automation, gas production fast, low energy consumption etc. Characteristics, product purity can be in a large range according to the user needs to adjust, and the operation and maintenance are convenient, the operation cost is lower.

[0003] At present, the existing air separation equipment is mainly oxygen and nitrogen equipment, wherein the oxygen air separation equipment needs to be pressurized by an oxygen compressor after preparing qualified oxygen by pressure swing adsorption, is pressurized to 0.7-0.8Mpa, enters an oxygen storage tank for storage, is depressurized to 0.4~0.45Mpa by a pressure reducing valve, and is delivered to an oxygen terminal. Although this working mode can keep the oxygen storage tank with sufficient oxygen supply, the cyclic work of pressurization and depressurization greatly increases energy consumption, and the oxygen compressor is always in a state of continuous work, which affects its service life. Therefore, the existing air separation equipment oxygen terminal device needs to be further improved. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the deficiency in prior art, provides an energy -conserving type air separation equipment oxygen terminal partial pressure device, has simple structure, oxygen supply stability is good, energy consumption is low, oxygen compressor service life is long etc. Characteristics, can be widely used in various industrial, medical oxygen terminal technical field.

[0005] In order to realize the above-mentioned purpose, the utility model takes the following technical scheme: an energy -conserving type air separation equipment oxygen terminal partial pressure device, including oxygen buffer tank, the oxygen buffer tank rear end is equipped with first pressure regulating valve;The first pressure regulating valve rear end is connected with direct supply pipeline and partial pressure pipeline, the direct supply pipeline is equipped with second pressure regulating valve, the second pressure regulating valve rear end is equipped with oxygen terminal outlet, the partial pressure pipeline rear end is connected with oxygen compressor buffer tank, and is equipped with overflow valve on the partial pressure pipeline, when the oxygen buffer tank pressure is higher than direct supply set value and is overflowed by the overflow valve and is supplied to the oxygen compressor buffer tank;The oxygen compressor buffer tank rear end is connected with oxygen booster, the oxygen booster rear end is connected with oxygen storage tank, is delivered to the oxygen storage tank after pressurizing by the oxygen booster;The oxygen storage tank rear end is connected with the outlet pipeline, the outlet pipeline is connected with the oxygen terminal outlet, and is equipped with third pressure regulating valve on the outlet pipeline.

[0006] As an improvement, the oxygen buffer tank is a pressure vessel welded by an upper head, a middle cylinder and a lower head.

[0007] As an improvement, the oxygen buffer tank is provided with a safety valve at the top, a pressure gauge at the side and a blowdown ball valve at the bottom.

[0008] As an improvement, the pressure setting value of the first pressure regulating valve is higher than that of the second pressure regulating valve.

[0009] As an improvement, the overflow valve is a one-way cut-off overflow valve.

[0010] As an improvement, the working pressure of the oxygen booster is 0.3-0.4 MPa, and after boosting, the pressure can reach 0.6-0.8 MPa, and the boosted oxygen is stored in the oxygen storage tank.

[0011] As an improvement, the third pressure regulating valve is a pressure reducing regulator, and the regulated pressure meets the oxygen pressure requirement of the oxygen terminal.

[0012] As an improvement, the oxygen terminal outlet is provided with a manual ball valve.

[0013] As an improvement, the oxygen storage tank is provided with a wear-resistant ceramic lining inside, and the wear-resistant ceramic lining is made of alumina.

[0014] The energy-saving oxygen terminal pressure dividing device for air separation equipment has the characteristics of simple structure, good oxygen supply stability, low energy consumption, long service life of oxygen pressure machine and the like. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a structural schematic view of the energy-saving oxygen terminal pressure dividing device for air separation equipment of the utility model;

[0016] Fig. 2 is a working principle schematic view of the energy-saving oxygen terminal pressure dividing device for air separation equipment of the utility model.

[0017] In the diagram: 1. Oxygen buffer tank; 2. First pressure regulating valve; 3. Direct supply pipeline; 4. Pressure dividing pipeline; 5. Second pressure regulating valve; 6. Oxygen terminal outlet; 7. Oxygen compressor buffer tank; 8. Overflow valve; 9. Oxygen booster; 10. Oxygen storage tank; 11. Gas outlet pipeline; 12. Manual ball valve; 13. Third pressure regulating valve; 14. Safety valve; 15. Pressure gauge; 16. Drain ball valve. Detailed Implementation

[0018] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] like Figs. 1-2 As shown in this embodiment, an energy-saving oxygen terminal pressure-splitting device for an air separation unit includes an oxygen buffer tank 1. A first pressure regulating valve 2 is provided at the rear end of the oxygen buffer tank 1. The rear end of the first pressure regulating valve 2 is connected to a direct supply pipeline 3 and a pressure-splitting pipeline 4. A second pressure regulating valve 5 is provided on the direct supply pipeline 3, and an oxygen terminal outlet 6 is provided at the rear end of the second pressure regulating valve 5. The rear end of the pressure-splitting pipeline 4 is connected to an oxygen compressor buffer tank 7, and an overflow valve 8 is provided on the pressure-splitting pipeline. When the pressure of the oxygen buffer tank 1 is higher than the direct supply set value, the overflow valve 8 overflows and supplies oxygen to the oxygen compressor buffer tank 7. The rear end of the oxygen compressor buffer tank 7 is connected to an oxygen booster 9, and the rear end of the oxygen booster 9 is connected to an oxygen storage tank 10. After being pressurized by the oxygen booster 9, the oxygen is delivered to the oxygen storage tank 10. The rear end of the oxygen storage tank 10 is connected to an outlet pipeline 11, which is connected to the oxygen terminal outlet 6. A third pressure regulating valve 13 is provided on the outlet pipeline 11.

[0020] Furthermore, the oxygen buffer tank 1 is a pressure vessel welded from an upper end cap, an intermediate cylinder, and a lower end cap, and the rated working pressure of the oxygen buffer tank 1 is 0.8~1.0MPa. Specifically, the oxygen buffer tank 1 is equipped with a safety valve 14 at the top, a pressure gauge 15 on the side, and a drain ball valve 16 at the bottom. The safety valve 14 can automatically release pressure when the inlet pressure exceeds the rated pressure, ensuring the safe operation of the oxygen buffer tank 1. The drain ball valve 16 can be used to periodically discharge and clean the wastewater and impurities inside the oxygen buffer tank 1, ensuring the cleanliness of the tank interior.

[0021] Furthermore, the pressure setting value of the first pressure regulating valve 2 is higher than the pressure setting value of the second pressure regulating valve 5; specifically, the pressure setting value of the first pressure regulating valve 2 is 0.55~0.6MPa, the pressure setting value of the second pressure regulating valve 5 is 0.45~0.5MPa, and the pressure setting value of the second pressure regulating valve 5 is higher than the required pressure value of the oxygen terminal, which can be set to 0.4~0.45MPa.

[0022] Further, the overflow valve 8 is a one-way cut-off overflow valve, thereby preventing oxygen backflow after pressurization, when the oxygen supply pressure of the oxygen buffer tank 1 exceeds the pressure value set by the first pressure regulating valve, overflow pressure division is performed through the overflow valve 8, and the low-pressure oxygen after overflow enters the oxygen pressure machine buffer tank 7 and is pressurized by the oxygen pressurizer 9 and then enters the oxygen storage tank 10. Specifically, the working pressure of the oxygen pressurizer 9 is 0.3-0.4 MPa, and the oxygen pressure after pressurization can reach 0.6-0.8 MPa, and the pressurized oxygen is stored in the oxygen storage tank 10.

[0023] Further, the third pressure regulating valve 13 is a pressure reducing regulator, and the regulated pressure meets the oxygen pressure requirement of the oxygen terminal; specifically, the third pressure regulating valve 13 regulates the oxygen pressure of 0.6-0.8 MPa in the oxygen storage tank 10 to 0.4-0.45 MPa and then outputs to the oxygen terminal outlet 6.

[0024] Further, the oxygen terminal outlet 6 is provided with a manual ball valve 12 at the rear end, which can realize emergency shutdown of the gas source in the case of power failure or gas failure.

[0025] Further, the oxygen storage tank 10 is provided with a wear-resistant ceramic lining, and the wear-resistant ceramic lining is made of alumina, which prevents corrosion inside the cylinder of the oxygen storage tank and prolongs the service life of the oxygen storage tank.

[0026] The energy-saving oxygen terminal pressure dividing device for air separation equipment has the characteristics of simple structure, good oxygen supply stability, low energy consumption, long service life of oxygen pressure machine, etc., and the working principle is that the oxygen generator produces qualified oxygen which enters the oxygen buffer tank 1, the oxygen buffer tank 1 is connected with the direct supply pipeline 3 and the pressure dividing pipeline 4 at the rear end, when the oxygen pressure inside the oxygen buffer tank 1 is not high, the oxygen is directly supplied to the oxygen terminal outlet 6 through the direct supply pipeline 3 after pressure regulation by the second pressure regulating valve 5; when the oxygen pressure inside the oxygen buffer tank 1 is too high, overflow pressure division is performed through the overflow valve 8, and then the oxygen enters the oxygen storage tank 10 after pressurization by the oxygen pressurizer 9, at this time, the oxygen pressure inside the oxygen storage tank 10 is high, and the oxygen is supplied to the oxygen terminal outlet 6 after pressure reduction regulation by the third pressure regulating valve 13, realizing the cooperative work of the two oxygen supply pipelines of direct supply and pressure division, greatly reducing the working time of the oxygen pressurizer and reducing the working energy consumption.

[0027] Finally, it should be noted that the above-mentioned is only a specific embodiment of the present application. Obviously, the present application is not limited to the above-mentioned, and there are many variations. All variations that can be directly derived or imagined from the content disclosed in the present application by those skilled in the art should be considered as the protection scope of the present application.

Claims

1. An energy-saving oxygen terminal pressure reducing device for air separation equipment, characterized in that, The oxygen buffer tank (1) is provided with a first pressure regulating valve (2) at the rear end; the rear end of the first pressure regulating valve (2) is connected with a direct supply pipeline (3) and a pressure reduction pipeline (4), the direct supply pipeline (3) is provided with a second pressure regulating valve (5), the rear end of the second pressure regulating valve (5) is provided with an oxygen terminal outlet (6), the rear end of the pressure reduction pipeline (4) is connected with an oxygen compressor buffer tank (7), and an overflow valve (8) is arranged on the pressure reduction pipeline (4); the rear end of the oxygen compressor buffer tank (7) is connected with an oxygen booster (9), the rear end of the oxygen booster (9) is connected with an oxygen storage tank (10), and the oxygen booster (9) is used to pressurize and deliver to the oxygen storage tank (10); the rear end of the oxygen storage tank (10) is connected with an outlet pipeline (11), the outlet pipeline (11) is connected with the oxygen terminal outlet (6), and a third pressure regulating valve (13) is arranged on the outlet pipeline (11).

2. The energy-saving oxygen terminal pressure dividing device for an air separation plant according to claim 1, characterized by The oxygen buffer tank (1) is a pressure vessel welded by an upper head, an intermediate cylinder and a lower head.

3. The energy-saving oxygen terminal pressure dividing device for an air separation plant according to claim 2, characterized by The oxygen buffer tank (1) is provided with a safety valve (14) at the top, a pressure gauge (15) at the side and a blowdown ball valve (16) at the bottom.

4. The energy-saving oxygen terminal pressure dividing device for an air separation plant according to claim 1, characterized by The pressure setting value of the first pressure regulating valve (2) is higher than that of the second pressure regulating valve (5).

5. The energy-saving oxygen terminal pressure dividing device for an air separation plant according to claim 1, characterized by The overflow valve (8) is a one-way stop overflow valve.

6. The energy-saving oxygen terminal pressure dividing device for an air separation plant according to claim 1, characterized by The working pressure of the oxygen booster (9) is 0.3-0.4 MPa, and after pressurization, it can reach 0.6-0.8 MPa, and the pressurized oxygen is stored in the oxygen storage tank (10).

7. The energy-saving oxygen terminal pressure dividing device for an air separation plant according to claim 1, characterized by The rear end of the oxygen terminal outlet (6) is provided with a manual ball valve (12).

8. The energy-saving oxygen terminal pressure dividing device for an air separation plant according to claim 1, characterized by The oxygen storage tank (10) is provided with a wear-resistant ceramic lining inside, and the wear-resistant ceramic lining is made of alumina.

Images