Three-tower oxygen generator with gas drying function

Abstract

The utility model discloses a three-tower type oxygen generator with a gas drying function. The three-tower type oxygen generator comprises two adsorption towers and an oxygen storage tower positioned between the two adsorption towers, the air inlet end of the drying cylinder is connected with the air inlet end of the three-tower oxygen generator through an air inlet pipeline, the air inlet end of the drying cylinder is detachably connected with the air inlet pipeline, and an air valve is arranged on the air inlet pipeline; the air outlet end of the drying cylinder is connected with the air inlet end of the adsorption cylinder through a middle pipeline, and the air outlet end of the drying cylinder and the air inlet end of the adsorption cylinder are detachably connected with the middle pipeline; the gas outlet end of the adsorption cylinder is connected with the oxygen connecting end of the oxygen storage tower through a gas outlet pipeline, the gas outlet end of the adsorption cylinder and the oxygen connecting end of the oxygen storage tower are detachably connected with the gas outlet pipeline, and a gas outlet valve is arranged on the gas outlet pipeline. According to the utility model, the independent drying cylinder is arranged in the adsorption tower to dry air, so that the molecular sieve in the adsorption cylinder is ensured to run in a dry environment, and the oxygen generator is ensured to stably and continuously output high-purity oxygen.

Description

Technical Field

[0001] The utility model relates to an oxygen generation device, in particular to a three-tower oxygen generator with a built-in drying cylinder. Background Art

[0002] Modern hospitals usually use medical oxygen generators or liquid oxygen as the oxygen source. The medical oxygen generator is one of the main sources of hospital oxygen. The medical oxygen generator is widely used in major medical institutions for its safety, convenience, stability, economy and other advantages. The medical oxygen generator usually uses the pressure swing adsorption technology to produce oxygen. According to different adsorbates, at a certain temperature, by changing the parameters of the same adsorbent under different pressures, the cyclic process of separating different adsorbates is achieved.

[0003] Molecular sieve is the most important component in the pressure swing adsorption oxygen generation process. Moisture in the air has a great influence on the molecular sieve. Un-dried air will cause the pore diameter of the molecular sieve to be blocked, thereby reducing the oxygen production and concentration of the oxygen generator, resulting in poor oxygen generation effect. The traditional method is to separately add an independent air dryer at the front end of the oxygen generator to dry the gas, which will cause problems such as long equipment process, high investment cost, and increased occupied space area. Patent CN208448979U discloses a PSA device with an integrated drying function. In this device, each adsorption tower is divided into upper and lower cavities by a wire mesh plate. The bottom of the cavity is filled with a desiccant, and the top is filled with an adsorbent to achieve the purpose of drying air and producing high-purity oxygen. In this patent, the filling amounts of the desiccant and the adsorbent need to be obtained through complex calculations according to the gas volume to be processed and the dew point requirements to be achieved. Moreover, the adsorbent and the desiccant are in the same adsorption tower, and the replacement of the adsorbent and the desiccant is very inconvenient. During use, the pulverization of the adsorbent and the desiccant may cause the two to be doped, affecting the oxygen generation effect. Summary of the Utility Model

[0004] The utility model provides a three-tower oxygen generator with a gas drying function, and its purpose is to: dry the air by setting an independent drying cylinder in the adsorption tower to ensure that the molecular sieve inside the adsorption cylinder operates in a dry environment, and ensure that the oxygen generator stably and continuously outputs high-purity oxygen.

[0005] The technical solution of the utility model is as follows:

[0006] A three-tower oxygen generator with a gas drying function, comprising a first adsorption tower (100), a second adsorption tower (300) and an oxygen storage tower (200). The first adsorption tower (100) includes a first drying cylinder (101) and a first adsorption cylinder (102) arranged front and back. The second adsorption tower (300) includes a second drying cylinder (301) and a second adsorption cylinder (302) arranged front and back. The oxygen storage tower (200) is located between the first adsorption tower (100) and the second adsorption tower (300). The air inlet end of the first drying cylinder (101) is connected to the air inlet end of the three-tower oxygen generator through a first air inlet pipeline, and the connection between the air inlet end of the first drying cylinder (101) and the first air inlet pipeline is detachable. A first air valve (1) is provided on the first air inlet pipeline. The air outlet end of the first drying cylinder (101) is connected to the air inlet end of the first adsorption cylinder (102) through a first intermediate pipeline, and the connections between the air outlet end of the first drying cylinder (101) and the air inlet end of the first adsorption cylinder (102) and the first intermediate pipeline are both detachable. The air outlet end of the first adsorption cylinder (102) is connected to the oxygen connection end of the oxygen storage tower (200) through a first air outlet pipeline, and the connections between the air outlet end of the first adsorption cylinder (102) and the oxygen connection end of the oxygen storage tower (200) and the first air outlet pipeline are both detachable. A first air outlet valve (5) is provided on the first air outlet pipeline. The air inlet end of the second drying cylinder (301) is connected to the air inlet end of the three-tower oxygen generator through a second air inlet pipeline, and the connection between the air inlet end of the second drying cylinder (301) and the second air inlet pipeline is detachable. A second air valve (2) is provided on the second air inlet pipeline. The air outlet end of the second drying cylinder (301) is connected to the air inlet end of the second adsorption cylinder (302) through a second intermediate pipeline, and the connections between the air outlet end of the second drying cylinder (301) and the air inlet end of the second adsorption cylinder (302) and the second intermediate pipeline are both detachable. The air outlet end of the second adsorption cylinder (302) is connected to the oxygen connection end of the oxygen storage tower (200) through a second air outlet pipeline, and the connections between the air outlet end of the second adsorption cylinder (302) and the oxygen connection end of the oxygen storage tower (200) and the second air outlet pipeline are both detachable. A second air outlet valve (6) is provided on the second air outlet pipeline.

[0007] Furthermore, the air outlet end of the first adsorption cylinder (102) is connected to the air equalizing connection end of the oxygen storage tower (200) through a first air equalizing pipeline. A first air equalizing valve (7) is provided on the first air equalizing pipeline. The air outlet end of the second adsorption tower (300) is connected to the air equalizing connection end of the oxygen storage tower (200) through a second air equalizing pipeline. A second air equalizing valve (8) is provided on the second air equalizing pipeline. The air equalizing connection end and the oxygen connection end are located at both ends of the oxygen storage tower (200).

[0008] Further, it further includes a three-way check valve (11). The first air inlet of the three-way check valve (11) is connected to the first air inlet pipeline, and the second air inlet of the three-way check valve (11) is connected to the second air inlet pipeline. The air outlet of the three-way check valve (11) is connected to the air outlet end of the first adsorption cylinder (102) through a first return air pipeline, and a first desorption valve (9) is provided on the first return air pipeline. The air outlet of the three-way check valve (11) is also connected to the air outlet end of the second adsorption cylinder (302) through a second return air pipeline, and a second desorption valve (10) is provided on the second return air pipeline.

[0009] Further, it further includes a first exhaust pipeline and a second exhaust pipeline. The air inlet end of the first drying cylinder (101) is connected to the air inlet end of the first exhaust pipeline, and a first exhaust valve (3) is provided on the first exhaust pipeline. The air inlet end of the second drying cylinder (301) is connected to the air inlet end of the second exhaust pipeline, and a second exhaust valve (4) is provided on the second exhaust pipeline. The air outlet ends of the first exhaust pipeline and the second exhaust pipeline are both connected to a muffler (16).

[0010] Further, the oxygen storage tower (200) includes a first oxygen storage cylinder (201) and a second oxygen storage cylinder (202). The first oxygen storage cylinder (201) and the second oxygen storage cylinder (202) are connected in parallel through a third intermediate pipeline, and this connection is detachable.

[0011] Further, two wire mesh plates (14) are respectively provided in the middle of the cylinders of the drying cylinder and the adsorption cylinder. The cylinder also includes an upper flange (12) and a lower flange (15), and springs (13) are respectively provided between the upper flange (12) and the lower flange (15) and the corresponding wire mesh plate (14).

[0012] Compared with the prior art, the present utility model has the following positive effects:

[0013] (1) By arranging an independent drying cylinder inside the adsorption tower, the air is dried before adsorption oxygen production, ensuring that the molecular sieve operates in a dry environment, improving the use effect of the oxygen generator, shortening the entire oxygen production equipment process, reducing costs, and reducing space occupation, thus achieving good results.

[0014] (2) The adsorption cylinder and the drying cylinder are independently arranged, which is convenient for replacement and maintenance, and solves the problem that the mixing of pulverized adsorbent and desiccant affects the oxygen production effect. Description of the Drawings

[0015] Figure 1 It is the overall structure diagram of the three-tower oxygen generator of the present utility model;

[0016] Figure 2 It is the structure schematic diagram of the drying cylinder and the adsorption cylinder of the present utility model;

[0017] Figure 3 This is the pipeline schematic diagram of the three-tower oxygen generator of the present utility model.

[0018] In the figure, 100 is the first adsorption tower; 101 is the first drying cylinder; 102 is the first adsorption cylinder; 200 is the oxygen storage tower; 201 is the first oxygen storage cylinder; 202 is the second oxygen storage cylinder; 300 is the second adsorption tower; 301 is the second drying cylinder; 302 is the second adsorption cylinder; 1 is the first air valve; 2 is the second air valve; 3 is the first exhaust valve; 4 is the second exhaust valve; 5 is the first outlet valve; 6 is the second outlet valve; 7 is the first equalizing valve; 8 is the second equalizing valve; 9 is the first desorption valve; 10 is the second desorption valve; 11 is a three-way check valve; 12 is the upper flange; 13 is the spring; 14 is the wire mesh plate; 15 is the lower flange; 16 is the silencer; 17 is the bracket. Specific embodiments

[0019] The technical solution of the present utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0020] As Figure 1 and Figure 2 , a three-tower oxygen generator with a gas drying function includes a bracket 17, a first adsorption tower 100, an oxygen storage tower 200, a second adsorption tower 300, a pipeline system and a control system.

[0021] The first adsorption tower 100 includes a first drying cylinder 101 and a first adsorption cylinder 102 arranged front and back, and the second adsorption tower 300 includes a second drying cylinder 301 and a second adsorption cylinder 302 arranged front and back; the oxygen storage tower 200 is located between the first adsorption tower 100 and the second adsorption tower 300.

[0022] The intake end of the first drying cylinder 101 is connected to the intake end of the three-tower oxygen generator through the first intake pipeline. The connection between the intake end of the first drying cylinder 101 and the first intake pipeline is detachable, and a first air valve 1 is provided on the first intake pipeline; the outlet end of the first drying cylinder 101 is connected to the intake end of the first adsorption cylinder 102 through the first intermediate pipeline. The connections between the outlet end of the first drying cylinder 101 and the intake end of the first adsorption cylinder 102 and the first intermediate pipeline are both detachable; the outlet end of the first adsorption cylinder 102 is connected to the oxygen connection end of the oxygen storage tower 200 through the first outlet pipeline. The connections between the outlet end of the first adsorption cylinder 102 and the oxygen connection end of the oxygen storage tower 200 and the first outlet pipeline are both detachable, and a first outlet valve 5 is provided on the first outlet pipeline; the intake end of the second drying cylinder 301 is connected to the intake end of the three-tower oxygen generator through the second intake pipeline. The connection between the intake end of the second drying cylinder 301 and the second intake pipeline is detachable, and a second air valve 2 is provided on the second intake pipeline; the outlet end of the second drying cylinder 301 is connected to the intake end of the second adsorption cylinder 302 through the second intermediate pipeline. The connections between the outlet end of the second drying cylinder 301 and the intake end of the second adsorption cylinder 302 and the second intermediate pipeline are both detachable; the outlet end of the second adsorption cylinder 302 is connected to the oxygen connection end of the oxygen storage tower 200 through the second outlet pipeline. The connections between the outlet end of the second adsorption cylinder 302 and the oxygen connection end of the oxygen storage tower 200 and the second outlet pipeline are both detachable, and a second outlet valve 6 is provided on the second outlet pipeline.

[0023] The outlet end of the first adsorption cylinder 102 is connected to the gas equalizing connection end of the oxygen storage tower 200 through the first gas equalizing pipeline, and a first gas equalizing valve 7 is provided on the first gas equalizing pipeline. The outlet end of the second adsorption tower 300 is connected to the gas equalizing connection end of the oxygen storage tower 200 through the second gas equalizing pipeline, and a second gas equalizing valve 8 is provided on the second gas equalizing pipeline; the gas equalizing connection end and the oxygen connection end are located at both ends of the oxygen storage tower 200.

[0024] The three-tower oxygen generator with gas drying function further includes a three-way one-way valve 11. The first intake port of the three-way one-way valve 11 is connected to the first intake pipeline, and the second intake port of the three-way one-way valve 11 is connected to the second intake pipeline; the outlet port of the three-way one-way valve 11 is connected to the outlet end of the first adsorption cylinder 102 through the first return pipeline, and a first desorption valve 9 is provided on the first return pipeline. The outlet port of the three-way one-way valve 11 is also connected to the outlet end of the second adsorption cylinder 302 through the second return pipeline, and a second desorption valve 10 is provided on the second return pipeline.

[0025] The three - tower oxygen generator with gas drying function further includes a first exhaust pipeline and a second exhaust pipeline. The intake end of the first drying cylinder 101 is connected to the intake end of the first exhaust pipeline. A first exhaust valve 3 is provided on the first exhaust pipeline. The intake end of the second drying cylinder 301 is connected to the intake end of the second exhaust pipeline. A second exhaust valve 4 is provided on the second exhaust pipeline. The outlet ends of the first exhaust pipeline and the second exhaust pipeline are both connected to a muffler 16.

[0026] Two wire mesh plates 14 are provided in the middle of the cylinders of the drying cylinder and the adsorption cylinder. The cylinder also includes an upper flange 12 and a lower flange 15. Springs 13 are respectively provided between the upper flange 12 and the lower flange 15 and the corresponding wire mesh plate 14 on the corresponding side. The two springs 13 press the corresponding wire mesh plate 14 to fix the desiccant or molecular sieve, preventing the internal desiccant or molecular sieve from shaking and causing it to fail after being crushed. When the oxygen generator needs to replace the desiccant or molecular sieve, the drying cylinder or the adsorption cylinder can be replaced as a whole, which is convenient, efficient and fast, greatly shortening the equipment maintenance time.

[0027] The oxygen storage tower 200 includes a first oxygen storage cylinder 201 and a second oxygen storage cylinder 202. The first oxygen storage cylinder 201 and the second oxygen storage cylinder 202 are connected in parallel through a third intermediate pipeline, and this connection is detachable. The oxygen storage tower 200 includes a first oxygen storage cylinder 201 and a second oxygen storage cylinder 202 with the same size and shape as the adsorption cylinder and the drying cylinder, which is convenient for maintenance, replacement and expansion.

[0028] As Figure 3 Shown in the pipeline schematic diagram of the three - tower oxygen generator, after the outside air is filtered by a filter and compressed by a compressor, it first enters the first drying cylinder 101 of the first adsorption tower 100 through the first intake pipeline and the first air valve 1. Alumina desiccant is placed in the first drying cylinder 101. The moisture in the air flow is adsorbed by the desiccant, and then it enters the first adsorption cylinder 102 through the first intermediate pipeline. Through the molecular sieve inside it, impurity gases such as nitrogen are adsorbed. At this time, the first outlet valve 5 is opened, and oxygen enters the oxygen storage tower 200 located in the middle through the first outlet pipeline for storage. During the adsorption process of the first adsorption tower 100, the second adsorption tower 300 simultaneously undergoes a decompression desorption process. At this time, the second exhaust valve 4 is opened, and impurity gases such as nitrogen are discharged through the second exhaust valve 4 and the muffler 16, and the pressure drops. Then, the second desorption valve 10 in the second return pipeline is intermittently opened, and compressed air enters the second adsorption tower 300 through the second intake port of the three - way one - way valve 11 and the second desorption valve 10 to back - blow the nitrogen in it and reserve air at the same time. When the gas passes through the second drying cylinder 301 of the second adsorption tower 300, the moisture in the drying cylinder is carried out. After a period of time, all valves are closed, and the second equalizing valve 8 is opened, and the oxygen storage tower 200 and the second adsorption tower 300 are equalized.

[0029] After the second equalizing valve 8 is closed, the second air valve 2, the first exhaust valve 3, and the second air outlet valve 6 are opened. Air enters the second drying cylinder 301 of the second adsorption tower 300 through the second air inlet pipeline in sequence. After the gas is dried, it enters the second adsorption cylinder 302 through the second intermediate pipeline. Nitrogen and other impurity gases are adsorbed by the molecular sieve. The second air outlet valve 6 is opened, and the obtained oxygen enters the oxygen storage tower 200 through the third intermediate pipeline. During this process, the first exhaust valve 3 is opened, and nitrogen and other impurity gases in the first adsorption tower 100 are discharged through the first exhaust valve 3 and the silencer 16, and the pressure drops. At this time, the first desorption valve 9 in the back-blowing pipeline is intermittently opened. The nitrogen gas after adsorption enters the first adsorption tower 100 through the three-way one-way valve 11 and the first desorption valve 9, and blows back the first adsorption tower 100 and takes away the moisture adsorbed by the desiccant. After a period of time, all valves are closed, and the first equalizing valve 7 is opened, and the oxygen storage tower 200 and the first adsorption tower 100 are equalized in pressure.

[0030] Repeat the above process, and the first adsorption tower 100 and the second adsorption tower 300 cooperate alternately to continuously and efficiently produce oxygen and transport it to the oxygen storage tower 200.

[0031] It should be noted that for those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. The scope of the present utility model is defined by the claims rather than the above description.

Claims

1. A three-tower oxygen generator with a gas drying function, comprising a first adsorption tower (100), a second adsorption tower (300) and an oxygen storage tower (200), characterized in that: The first adsorption tower (100) comprises a first drying cylinder (101) and a first adsorption cylinder (102) arranged in a front-to-back relationship, and the second adsorption tower (300) comprises a second drying cylinder (301) and a second adsorption cylinder (302) arranged in a front-to-back relationship; the oxygen storage tower (200) is located between the first adsorption tower (100) and the second adsorption tower (300); The air inlet end of the first drying cylinder (101) is connected to the air inlet end of the three-tower oxygen generator via a first air inlet pipeline, the connection between the air inlet end of the first drying cylinder (101) and the first air inlet pipeline is detachable, and a first air valve (1) is provided on the first air inlet pipeline; the air outlet end of the first drying cylinder (101) is connected to the air inlet end of the first adsorption cylinder (102) via a first intermediate pipeline, and the connections between the air outlet end of the first drying cylinder (101) and the air inlet end of the first adsorption cylinder (102) and the first intermediate pipeline are both detachable; the air outlet end of the first adsorption cylinder (102) is connected to the oxygen connection end of the oxygen storage tower (200) via the first air outlet pipeline, the connections between the air outlet end of the first adsorption cylinder (102) and the oxygen connection end of the oxygen storage tower (200) and the first air outlet pipeline are both detachable, and a first air outlet valve (5) is provided on the first air outlet pipeline; The air inlet end of the second drying cylinder (301) is connected to the air inlet end of the three-tower oxygen generator via a second air inlet pipeline, the connection between the air inlet end of the second drying cylinder (301) and the second air inlet pipeline is detachable, and a second air valve (2) is provided on the second air inlet pipeline; the air outlet end of the second drying cylinder (301) is connected to the air inlet end of the second adsorption cylinder (302) via a second intermediate pipeline, and the connections between the air outlet end of the second drying cylinder (301) and the air inlet end of the second adsorption cylinder (302) and the second intermediate pipeline are both detachable; the air outlet end of the second adsorption cylinder (302) is connected to the oxygen connection end of the oxygen storage tower (200) via the second air outlet pipeline, the air outlet end of the second adsorption cylinder (302) and the oxygen connection end of the oxygen storage tower (200) are both detachable from the second air outlet pipeline, and a second air outlet valve (6) is provided on the second air outlet pipeline.

2. The three-tower oxygen concentrator with gas drying function as claimed in claim 1, characterized in that: The gas outlet end of the first adsorption cylinder (102) is connected to the gas equalizing connection end of the oxygen storage tower (200) via a first gas equalizing pipeline, and a first gas equalizing valve (7) is provided on the first gas equalizing pipeline; the gas outlet end of the second adsorption tower (300) is connected to the gas equalizing connection end of the oxygen storage tower (200) via a second gas equalizing pipeline, and a second gas equalizing valve (8) is provided on the second gas equalizing pipeline; the gas equalizing connection end and the oxygen connection end are located at two ends of the oxygen storage tower (200).

3. The three-tower oxygen concentrator with gas drying function as claimed in claim 1, characterized in that: It also includes a three-way one-way valve (11), wherein a first air inlet of the three-way one-way valve (11) is connected to a first air inlet pipeline, and a second air inlet of the three-way one-way valve (11) is connected to a second air inlet pipeline; an air outlet of the three-way one-way valve (11) is connected to an air outlet end of a first adsorption cylinder (102) via a first air return pipeline, a first desorption valve (9) is provided on the first air return pipeline, and an air outlet of the three-way one-way valve (11) is also connected to an air outlet end of a second adsorption cylinder (302) via a second air return pipeline, and a second desorption valve (10) is provided on the second air return pipeline.

4. The three-tower oxygen concentrator with gas drying function as claimed in claim 1, characterized in that: It also includes a first exhaust pipeline and a second exhaust pipeline, wherein the air inlet end of the first drying cylinder (101) is connected to the air inlet end of the first exhaust pipeline, a first exhaust valve (3) is provided on the first exhaust pipeline, the air inlet end of the second drying cylinder (301) is connected to the air inlet end of the second exhaust pipeline, a second exhaust valve (4) is provided on the second exhaust pipeline, and the air outlet ends of the first exhaust pipeline and the second exhaust pipeline are both connected to a muffler (16).

5. The three-tower oxygen concentrator with gas drying function according to any one of claims 1 to 4, characterized in that: The oxygen storage tower (200) comprises a first oxygen storage cylinder (201) and a second oxygen storage cylinder (202); the first oxygen storage cylinder (201) and the second oxygen storage cylinder (202) are connected in parallel via a third intermediate pipeline, and the connection is detachable.

6. The three-tower oxygen concentrator with gas drying function according to any one of claims 1 to 4, characterized in that: Two wire mesh plates (14) are arranged in the middle of the cylinder bodies of the drying cylinder and the adsorption cylinder. The cylinder bodies also include an upper flange (12) and a lower flange (15). Springs (13) are arranged between the upper flange (12) and the lower flange (15) and the wire mesh plates (14) on the corresponding sides.

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