Novel PSA oxygen generator

Abstract

The novel PSA oxygen generator comprises a first adsorber and a second adsorber which are used for being filled with adsorbents, the upper end of the first adsorber and the upper end of the second adsorber are communicated with a first air outlet and a second air outlet respectively, and the lower end of the first adsorber and the lower end of the second adsorber are communicated with a first air inlet and a second air inlet respectively. A first pressure equalizing pipe is connected between the first air inlet and the second air outlet in a communicating mode, a second pressure equalizing pipe is connected between the second air inlet and the first air outlet in a communicating mode, and pressure equalizing valves are installed on the first pressure equalizing pipe and the second pressure equalizing pipe. The pressure of the adsorber after working is equalized from the upper part to the bottom of the adsorption tower to work, the part of gas cannot be directly sent to the rear end and can penetrate through the molecular sieve bed layer from bottom to top, and impurity gas can be further adsorbed in the process, so that the fluctuation of purity is avoided, the adsorption efficiency is greatly improved, and the yield of the whole equipment is also increased.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen generators, and particularly relates to a new type of PSA oxygen generator. Background Art

[0002] The working process of an oxygen generator is that the raw air after compression and purification flows through an adsorber filled with molecular sieve. The compressed air flows through the adsorber from bottom to top. During this process, nitrogen molecules are adsorbed by the adsorbent, and oxygen flows out from the upper end of the adsorber and enters the oxygen buffer tank. After a period of time, the adsorbent in the adsorber is saturated with adsorption and enters the regeneration process. Regeneration means stopping the intake of adsorption air, then equalizing the pressure with another group of adsorbers to reduce the pressure of the regenerated adsorber, and finally directly discharging it to the atmosphere to reduce the pressure to atmospheric pressure.

[0003] At present, the equalizing method in the original process of the oxygen generator is to equalize the pressure from the upper part of the adsorption tower that has ended its work to the upper part of the adsorption tower to be worked. This will cause impure oxygen to be equalized to the adsorption tower to be worked, and the top of the adsorption tower is the closest to the oxygen outlet. This results in the non-compliance of the purity of the oxygen just transported out, because during the equalizing process, as the pressure of the molecular sieve saturated with adsorption decreases, part of the adsorbed impurity gas will be desorbed and will also enter the other adsorber along the equalizing path, causing purity pollution. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a new type of PSA oxygen generator, which connects two adsorbers, and one adsorber equalizes the pressure to the bottom of the other adsorber from the top, so as to solve the problem that impure oxygen is equalized to the adsorption tower to be worked and the purity of the oxygen just transported out does not meet the standard as mentioned in the above background art.

[0005] According to one aspect of the present disclosure, the following technical solution is provided: A new type of PSA oxygen generator includes a first adsorber and a second adsorber for loading adsorbent. The upper ends of the first adsorber and the second adsorber are respectively connected with a first air outlet and a second air outlet in communication. The lower ends of the first adsorber and the second adsorber are respectively connected with a first air inlet and a second air inlet in communication. A first equalizing pipe is connected in communication between the first air inlet and the second air outlet. A second equalizing pipe is connected in communication between the second air inlet and the first air outlet. Equalizing valves are installed on both the first equalizing pipe and the second equalizing pipe.

[0006] According to a new type of PSA oxygen generator of at least one embodiment of the present disclosure, interactive pipes are connected in communication to both the first air inlet and the second air inlet, and the upper ends of the two interactive pipes are connected with each other in communication.

[0007] According to a new type of PSA oxygen generator of at least one embodiment of the present disclosure, air outlet pipes are connected in communication to both the first air outlet and the second air outlet, and one ends of the two air outlet pipes are connected with each other in communication.

[0008] A new type of PSA oxygen generator according to at least one embodiment of the present disclosure, wherein first solenoid valves are installed on both the interaction pipe and the outlet pipe.

[0009] A new type of PSA oxygen generator according to at least one embodiment of the present disclosure, wherein second solenoid valves are installed at the joints of the two interaction pipes and at the joints of the two outlet pipes.

[0010] A new type of PSA oxygen generator according to at least one embodiment of the present disclosure, wherein the equalizing valve, the first solenoid valve, and the second solenoid valve are all controlled by a PLC to start and stop.

[0011] Technical effects and advantages of the present utility model:

[0012] The adsorber that has completed the work is evenly pressured from the upper part to the bottom of the adsorption tower to be worked. This part of the gas will not be directly sent to the backend. Instead, it will pass through the molecular sieve bed layer from bottom to top. During this process, the impurity gas will be further adsorbed. Therefore, when it reaches the top, the oxygen purity is already qualified, and the gas sent out is always qualified, avoiding fluctuations in purity. The purity of this part of the equalizing gas is much higher than that of the raw material air, so the adsorption efficiency is greatly improved, and the overall equipment output has also increased significantly.

[0013] The utilization efficiency of the molecular sieve is improved. With the same equipment scale, more qualified oxygen can be produced, reducing the manufacturing cost of the equipment. At the same time, the volume and weight of the equipment with the same output are also greatly reduced. While generating greater social benefits, it also expands the application scenarios and demands, and improves the efficiency of existing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, are used to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are included in this specification and form a part of this specification.

[0015] Figure 1 is a schematic diagram of the overall structure of a new type of PSA oxygen generator according to an embodiment of the present disclosure.

[0016] Figure 2 is a front view of a new type of PSA oxygen generator according to an embodiment of the present disclosure.

[0017] Specifically, the reference numerals in the drawings are as follows:

[0018] 1, first adsorber; 2, second adsorber; 3, first air inlet; 4, second air inlet; 5, first air outlet; 6, second air outlet; 7, equalizing valve; 8, first equalizing pipe; 9, second equalizing pipe; 10, outlet pipe; 11, interaction pipe. Detailed implementation mode

[0019] For descriptive purposes, the present disclosure may use spatial relative terms such as "under", "below", "beneath", "lower", "above", "over", "upper", and "side (e.g., as in "side wall")" to describe the relationship between one component and another (other) component as shown in the drawings. In addition to the orientation depicted in the drawings, the spatial relative terms are also intended to encompass different orientations during the use, operation, and / or manufacture of the device. For example, if the device in the drawings is flipped, a component described as "under" or "beneath" another component or feature will then be positioned "above" the other component or feature. Thus, the exemplary term "under" can encompass both the "above" and "below" orientations. Additionally, the device can be positioned otherwise (e.g., rotated 90 degrees or at other orientations), and accordingly, the spatial relative descriptive terms used herein are interpreted.

[0020] As Figure 1-2 shown, a novel PSA oxygen generator in the present disclosure includes a first adsorber 1 and a second adsorber 2 for loading adsorbents. The upper ends of the first adsorber 1 and the second adsorber 2 are respectively connected and provided with a first air outlet 5 and a second air outlet 6. The lower ends of the first adsorber 1 and the second adsorber 2 are respectively connected and provided with a first air inlet 3 and a second air inlet 4. A first equalizing pipe 8 is connected between the first air inlet 3 and the second air outlet 6. A second equalizing pipe 9 is connected between the second air inlet 4 and the first air outlet 5. Equalizing valves 7 are installed on both the first equalizing pipe 8 and the second equalizing pipe 9. By opening the corresponding equalizing valves 7, mutual equalization between the first adsorber 1 and the second adsorber 2 can be achieved.

[0021] In this embodiment, interactive pipes 11 are connected and installed on both the first air inlet 3 and the second air inlet 4. The upper ends of the two interactive pipes 11 are connected to each other. The interactive pipes 11 are provided to prevent the first air inlet 3 and the second air inlet 4 from being blocked and unable to intake air.

[0022] To facilitate the control of the air outlet of the first adsorber 1 and the second adsorber 2, in this embodiment, outlet pipes 10 are connected and installed on both the first air outlet 5 and the second air outlet 6. One ends of the two outlet pipes 10 are connected to each other.

[0023] In this embodiment, first solenoid valves are installed on both the interactive pipes 11 and the outlet pipes 10. By opening the first solenoid valve on the interactive pipe 11, the intake air of the first adsorber 1 or the second adsorber 2 can be controlled.

[0024] In this embodiment, second solenoid valves are installed at the connection of the two interactive pipes 11 and the connection of the two outlet pipes 10.

[0025] In this embodiment, the pressure equalizing valve 7, the first solenoid valve, and the second solenoid valve are all controlled to start and stop by a PLC to achieve automatic control.

[0026] The specific working process is as follows: When clean compressed air enters the bottom of the first adsorber 1 through the first air inlet 3 and flows through the adsorbent towards the outlet end, impurity components such as N2, CO2, and H2O are adsorbed, and the product oxygen flows out from the adsorber outlet;

[0027] After a period of time, the carbon molecular sieve in the first adsorber 1 is close to saturation. At this time, the first adsorber 1 automatically stops adsorbing and performs a short pressure equalization with the second adsorber 2 to quickly increase the pressure of the second adsorber 2, achieving the purpose of improving the oxygen production efficiency and reducing the consumption of compressed air;

[0028] The so-called pressure equalization is to connect the first adsorber 1 and the second adsorber 2 through the first pressure equalizing pipe 8 and the second pressure equalizing pipe 9, so that the gas in the first adsorber 1 (to be desorbed) flows to the second adsorber 2 (to be adsorbed), and finally the gas pressures of the two groups of adsorbers are basically balanced.

[0029] In the description of this specification, the descriptions with reference to terms such as "an embodiment / way", "some embodiments / ways", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments / ways or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments / ways or examples described in this specification and the features of different embodiments / ways or examples.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] Those skilled in the art should understand that the above embodiments are only for clearly explaining the present disclosure and not for limiting the scope of the present disclosure. For those skilled in the art, other changes or modifications can be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A new type of PSA oxygen generator, comprising a first adsorber and a second adsorber for loading adsorbents, characterized in that: The upper ends of the first adsorber and the second adsorber are respectively communicated with a first air outlet and a second air outlet, and the lower ends of the first adsorber and the second adsorber are respectively communicated with a first air inlet and a second air inlet. A first equalizing pipe is connected in communication between the first air inlet and the second air outlet, and a second equalizing pipe is connected in communication between the second air inlet and the first air outlet. Equalizing valves are installed on both the first equalizing pipe and the second equalizing pipe.

2. The novel PSA oxygen generator according to claim 1, wherein: Interactive pipes are connected in communication to both the first air inlet and the second air inlet, and the upper ends of the two interactive pipes are connected to each other in communication.

3. The novel PSA oxygen generator according to claim 2, characterized in that: Outlet pipes are connected in communication to both the first air outlet and the second air outlet, and one ends of the two outlet pipes are connected to each other in communication.

4. The novel PSA oxygen generator according to claim 3, characterized in that: First solenoid valves are installed on both the interactive pipes and the outlet pipes.

5. The novel PSA oxygen generator according to claim 4, wherein: Second solenoid valves are installed at both the connection of the two interactive pipes and the connection of the two outlet pipes.

6. The novel PSA oxygen generator according to claim 5, wherein: The equalizing valves, the first solenoid valves and the second solenoid valves are all controlled to start and stop through a PLC.

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