Oxygen-enriched air purification device and oxygen-enriched air purification control method

Abstract

According to the oxygen-enriched air purification device and the oxygen-enriched air purification control method, in the oxygen production process, one of a first adsorption tower and a second adsorption tower can be selectively communicated through a conveying assembly, so that an oxygen-enriched raw material enters one of the first adsorption tower and the second adsorption tower, and oxygen in the oxygen-enriched raw material is adsorbed. After the oxygen-enriched raw material is introduced into one of the first adsorption tower and the second adsorption tower, the other one can introduce the adsorbed oxygen into the first pure oxygen tower for further adsorption and purification under the action of the power device, so that oxygen with relatively high purity is obtained. According to the oxygen-enriched air purification device, the oxygen is purified by utilizing the oxygen adsorption function of the first adsorption tower, the second adsorption tower and the first pure oxygen tower, so that compared with the traditional oxygen production technology, the oxygen production process is simple, a more convenient way can be effectively provided for small-sized pure oxygen using units, and the requirements of any-time production and on-demand production are met.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment, and in particular to an oxygen-enriched air purification device and an oxygen-enriched air purification control method. Background Art

[0002] The pure oxygen currently used (oxygen concentration ≥ 99.5%) usually includes cryogenic oxygen production and solid membrane air separation technology. Cryogenic oxygen production technology is an air separation process that uses the different boiling points of different gases in the air to first liquefy the air and then gradually heat it up to separate oxygen, nitrogen, argon and other gases in the air. The purity of the resulting gas can reach 99.9%. Solid membrane air separation technology is based on oxygen-enriched air, and through the filtration effect of the membrane, other gases are screened out to obtain high-purity oxygen.

[0003] However, the cryogenic oxygen production technology has a long start-up preparation time and complex process, and is only suitable for large-scale industrial oxygen or oxygen station oxygen supply, and cannot be adapted to small oxygen units. At the same time, the separation membrane process in the solid membrane air separation technology has relatively high requirements, high cost, and relatively low efficiency. Summary of the invention

[0004] Based on this, it is necessary to provide an oxygen-enriched air purification device and an oxygen-enriched air purification control method, which have a simple oxygen production process and high purification efficiency; at the same time, it provides a more convenient way for small pure oxygen users.

[0005] An oxygen-enriched air purification device, the oxygen-enriched air purification device comprises: a first adsorption tower, a second adsorption tower and a first pure oxygen tower, all of which are used to adsorb oxygen; a conveying component, used to control the oxygen-enriched raw material to selectively pass into the first adsorption tower and the second adsorption tower; a power mechanism, including a power device, a suction component connected to the suction end of the power device, and a discharge component connected to the discharge end of the power device, any one of the suction component and the discharge component is controllably connected to the first adsorption tower and the second adsorption tower, and the first pure oxygen tower is connected to the discharge component; wherein, when the conveying component controls the oxygen-enriched raw material to pass into one of the first adsorption tower and the second adsorption tower, the power device is used at least to drive the oxygen adsorbed in the other of the first adsorption tower and the second adsorption tower to pass into the first pure oxygen tower through the suction component.

[0006] The above-mentioned oxygen-enriched air purification device can be connected to one of the first adsorption tower and the second adsorption tower through the conveying component during the oxygen production process, so that the oxygen-enriched raw material enters one of the first adsorption tower and the second adsorption tower to adsorb the oxygen in the oxygen-enriched raw material. After the oxygen-enriched raw material is introduced into one of the first adsorption tower and the second adsorption tower, the other can, under the action of the power device, pass the adsorbed oxygen into the first pure oxygen tower for further adsorption and purification to obtain oxygen with higher purity. Since the oxygen-enriched air purification device of the present application utilizes the oxygen adsorption function of the first adsorption tower, the second adsorption tower and the first pure oxygen tower to complete the purification of oxygen, relative to the traditional oxygen production technology, the oxygen production process is simple, and it can effectively provide a more convenient way for small pure oxygen users to meet the requirements of production at any time and on demand. At the same time, during the purification process, the first adsorption tower and the second adsorption tower can be used alternately, one of which is in the process of adsorbing oxygen, and the other can be in the process of analyzing the adsorbed oxygen, so that the adsorption purification and analytical extraction operations are carried out simultaneously, effectively improving the purification efficiency.

[0007] In some embodiments, the oxygen-enriched air purification device also includes a balance tower, which is used to receive the first oxygen-containing gas discharged from the first pure oxygen tower after absorbing oxygen. The balance tower is connected to the suction assembly. When the conveying assembly controls the oxygen-rich raw material to pass into one of the first adsorption tower and the second adsorption tower, the power device is also used to drive the first oxygen-containing gas in the balance tower through the discharge assembly to pass into one of the first adsorption tower and the second adsorption tower that has the oxygen-rich raw material.

[0008] In some embodiments, the oxygen-enriched air purification device also includes a first pipeline, a first control valve, a second pipeline and a second control valve, the first pipeline is connected between the suction component and the balance tower, the first control valve is arranged on the first pipeline for controlling between the balance tower and the suction component; the second pipeline is connected between the discharge component and the first pure oxygen tower, the second control valve is arranged on the second pipeline for controlling between the first pure oxygen tower and the discharge component.

[0009] In some embodiments, the oxygen-enriched air purification device also includes an idling pipe and a third control valve, one end of the idling pipe is connected to the suction assembly and is located on one side of the suction end of the power unit, the other end of the idling pipe is connected to the second pipeline and is located on a side of the second control valve away from the first pure oxygen tower, and the third control valve is arranged on the idling pipe.

[0010] In some embodiments, the suction assembly includes a suction pipe, a first branch pipe, a second branch pipe, a first on-off valve and a second on-off valve, one end of the suction pipe is connected to the suction end of the power device, the other end of the suction pipe is respectively connected to the first branch pipe and the second branch pipe, the first on-off valve is arranged on the first branch pipe, the second on-off valve is arranged on the second branch pipe, the first branch pipe is connected to the first adsorption tower, the second branch pipe is connected to the second adsorption tower, and the balance tower is controllably connected to the suction pipe.

[0011] In some embodiments, the oxygen-enriched air purification device also includes a first connecting pipe, a second connecting pipe, a third on-off valve, a fourth on-off valve and a throttle valve. The first connecting pipe and the second connecting pipe are connected in parallel between the first pure oxygen tower and the balance tower. The third on-off valve is arranged in the first connecting pipe, and the fourth on-off valve and the throttle valve are both arranged in the second connecting pipe.

[0012] In some embodiments, the discharge component includes a discharge pipe, a first branch pipe, a second branch pipe, a fifth on-off valve and a sixth on-off valve, one end of the discharge pipe is connected to the discharge end of the power unit, and the other end is respectively connected to the first branch pipe and the second branch pipe, the fifth on-off valve is arranged on the first branch pipe, the sixth on-off valve is arranged on the second branch pipe, the first branch pipe is connected to the first adsorption tower, the second branch pipe is connected to the second adsorption tower, and the first pure oxygen tower is controllably connected to the discharge pipe.

[0013] In some embodiments, the oxygen-enriched air purification device also includes a second pure oxygen tower for adsorbing moisture in oxygen, a collecting pipe, a recovery pipe, a fourth control valve and a fifth control valve, one end of the collecting pipe is connected to the discharge component, and the other end is connected to the second pure oxygen tower, one end of the recovery pipe is connected to the suction component, and the other end is connected to the first pure oxygen tower, the fourth control valve is arranged on the collecting pipe, and the fifth control valve is arranged on the recovery pipe.

[0014] In some embodiments, the conveying assembly includes a conveying pipe, a first pipe fitting, a second pipe fitting, a sixth control valve and a seventh control valve, one end of the conveying pipe is connected to the first pipe fitting and the second pipe fitting respectively, and the other end is used to be connected to an oxygen-enriched tank storing the oxygen-enriched raw material, the sixth control valve is arranged on the first pipe fitting, the seventh control valve is arranged on the second pipe fitting, the first pipe fitting is connected to the first adsorption tower, and the second pipe fitting is connected to the second adsorption tower.

[0015] In some of the embodiments, the oxygen-enriched air purification device further includes a waste discharge component, and the waste discharge component is controllably connected to the first adsorption tower and the second adsorption tower, respectively.

[0016] In some embodiments, the first adsorption tower, the second adsorption tower and the first pure oxygen tower all include a tower body and a carbon molecular sieve contained in the tower body.

[0017] A method for controlling purification of oxygen-enriched air, using the oxygen-enriched air purification device described in any one of the above, the method comprising cyclically and alternately performing a first purification step and a second purification step; wherein the first purification step comprises: controlling the conveying component to be connected to the first adsorption tower so that the oxygen-enriched material passes into the first adsorption tower; controlling the suction component to be connected to the second adsorption tower, and the discharge component to be connected to the first pure oxygen tower, and controlling the power device to operate in a first mode so that the oxygen adsorbed in the second adsorption tower enters the first pure oxygen tower; controlling the first pure oxygen tower to be connected to the suction component, and the discharge component to be connected to the second pure oxygen tower, and controlling the power device to operate in the first mode so that the oxygen adsorbed in the second adsorption tower enters the first pure oxygen tower. The adsorbed oxygen and the oxygen adsorbed in the first pure oxygen tower enter the second pure oxygen tower; the second purification step includes: controlling the conveying component to be connected with the second adsorption tower so that the oxygen-rich material passes into the second adsorption tower; controlling the suction component to be connected with the first adsorption tower, and the discharge component to be connected with the first pure oxygen tower, and controlling the power device to work in the first mode so that the oxygen adsorbed in the first adsorption tower enters the first pure oxygen tower; controlling the first pure oxygen tower to be connected with the suction component, and the discharge component to be connected with the second pure oxygen tower, and controlling the power device to work in the first mode so that the oxygen adsorbed in the first adsorption tower and the oxygen adsorbed in the first pure oxygen tower enter the second pure oxygen tower.

[0018] The above-mentioned oxygen-enriched air purification control method adopts the above oxygen-enriched air purification device. During the oxygen production process, the conveying component can be selected to be connected to one of the first adsorption tower and the second adsorption tower, so that the oxygen-enriched raw material enters one of the first adsorption tower and the second adsorption tower to adsorb the oxygen in the oxygen-enriched raw material. After the oxygen-enriched raw material is passed into one of the first adsorption tower and the second adsorption tower, the other can, under the action of the power device, pass the adsorbed oxygen into the first pure oxygen tower for further adsorption and purification to obtain oxygen with higher purity. Since the oxygen-enriched air purification device of the present application utilizes the oxygen adsorption function of the first adsorption tower, the second adsorption tower and the first pure oxygen tower to complete the purification of oxygen, relative to the traditional oxygen production technology, the oxygen production process is simple, and it can effectively provide a more convenient way for small pure oxygen users to meet the requirements of production at any time and on demand. At the same time, during the purification process, the first adsorption tower and the second adsorption tower can be used alternately, one of which is in the process of adsorbing oxygen, and the other can be in the process of analyzing the adsorbed oxygen, so that the adsorption purification and analytical extraction operations are carried out simultaneously, effectively improving the purification efficiency.

[0019] In some of the embodiments, in the first purification step, before the step of controlling the suction component to be connected to the second adsorption tower and the discharge component to be connected to the first pure oxygen tower, it also includes: controlling the suction component to be connected to the second adsorption tower and the discharge component to be connected to the first pure oxygen tower, and controlling the power unit to operate in a second mode so that the second oxygen-containing gas after absorbing oxygen in the second adsorption tower enters the first pure oxygen tower; controlling the discharge component to be connected to the first adsorption tower and the suction component to be connected to the balance tower so that the first oxygen-containing gas in the balance tower enters the first adsorption tower.

[0020] In some of the embodiments, in the second purification step, before the step of controlling the suction component to be connected to the first adsorption tower and the discharge component to be connected to the first pure oxygen tower, it also includes: controlling the suction component to be connected to the first adsorption tower and the discharge component to be connected to the first pure oxygen tower, and controlling the power unit to operate in a first mode so that the third oxygen-containing gas after absorbing oxygen in the first adsorption tower enters the first pure oxygen tower; controlling the discharge component to be connected to the second adsorption tower and the suction component to be connected to the balance tower so that the first oxygen-containing gas in the balance tower enters the second adsorption tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the oxygen-enriched air purification device described in some embodiments of the present application.

[0022] Figure 2 This is an enlarged view of a portion of the structure of the oxygen-enriched air purification device described in some embodiments of the present application.

[0023] Figure 3 This is an enlarged view of another part of the structure of the oxygen-enriched air purification device described in some embodiments of the present application.

[0024] Figure 4 The process of the oxygen-enriched air purification method described in some embodiments of the present application is Figure 1 .

[0025] Figure 5 The process of the oxygen-enriched air purification method described in some embodiments of the present application is Figure 2 .

[0026] 10. First adsorption tower; 11. First flow guide pipe; 12. First equalizing pressure pipe; 13. First equalizing pressure valve; 20. Second adsorption tower; 21. Second flow guide pipe; 22. Second equalizing pressure pipe; 23. Second equalizing pressure valve; 30. First pure oxygen tower; 31. Second pipeline; 32. Second control valve; 33. Recovery pipe; 34. Fifth control valve; 35. First circulation pipe; 40. Balance tower; 41. First pipeline; 42. First control valve; 43. Second circulation pipe; 50. Power mechanism; 51. Power device; 511. Suction end; 512. Discharge end; 52. Suction assembly; 521. Suction pipe; 522. First branch pipe; 523. Second branch pipe; 524. First on-off valve; 525. Second on-off valve; 53. Discharge assembly; 531. The discharge pipe; 532, the first branch pipe; 533, the second branch pipe; 534, the fifth on-off valve; 535, the sixth on-off valve; 54, the idling pipe; 55, the third control valve; 60, the first connecting pipe; 61, the second connecting pipe; 62, the third on-off valve; 63, the fourth on-off valve; 64, the throttle valve; 70, the conveying assembly; 71, the conveying pipe; 72, the first pipe fitting; 73, the second pipe fitting; 74, the sixth control valve; 75, the seventh control valve; 76, the oxygen enrichment tank; 80, the waste discharge assembly; 81, the first waste discharge branch pipe; 82, the second waste discharge branch pipe; 83, the first waste discharge valve; 84, the second waste discharge valve; 85, the waste discharge main pipe; 90, the second pure oxygen tower; 91, the collecting pipe; 92, the fourth control valve; 93, the oxygen storage tank; 94, the seventh on-off valve. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0033] In some embodiments, please refer to Figure 1The present application provides an oxygen-enriched air purification device, which includes: a first adsorption tower 10, a second adsorption tower 20 and a first pure oxygen tower 30, all of which are used to adsorb oxygen; a conveying assembly 70, which is used to control the selective passage of oxygen-enriched raw materials into the first adsorption tower 10 and the second adsorption tower 20; a power mechanism 50, including a power device 51, a suction assembly 52 connected to a suction end 511 of the power device 51, and a discharge assembly 53 connected to a discharge end 512 of the power device 51, any one of the suction assembly 52 and the discharge assembly 53 is controllably connected to the first adsorption tower 10 and the second adsorption tower 20, and the first pure oxygen tower 30 is connected to the discharge assembly 53; wherein, when the conveying assembly 70 controls the passage of the oxygen-enriched raw materials into one of the first adsorption tower 10 and the second adsorption tower 20, the power device 51 is at least used to drive the oxygen adsorbed in the other of the first adsorption tower 10 and the second adsorption tower 20 to pass into the first pure oxygen tower 30 through the suction assembly 52.

[0034] The above-mentioned oxygen-enriched air purification device can be selectively connected to one of the first adsorption tower 10 and the second adsorption tower 20 through the conveying component 70 during the oxygen production process, so that the oxygen-enriched raw material enters one of the first adsorption tower 10 and the second adsorption tower 20 to adsorb the oxygen in the oxygen-enriched raw material. After the oxygen-enriched raw material is introduced into one of the first adsorption tower 10 and the second adsorption tower 20, the other can, under the action of the power device 51, pass the adsorbed oxygen into the first pure oxygen tower 30 for further adsorption and purification to obtain oxygen with higher purity. Since the oxygen-enriched air purification device of the present application utilizes the oxygen adsorption function of the first adsorption tower 10, the second adsorption tower 20 and the first pure oxygen tower 30 to complete the oxygen purification, compared with the traditional oxygen production technology, the oxygen production process is simple, and can effectively provide a more convenient way for small pure oxygen users to meet the requirements of production at any time and on demand. At the same time, during the purification process, the first adsorption tower 10 and the second adsorption tower 20 can be used alternately, one of which is in the process of adsorbing oxygen and the other is in the process of decomposing the adsorbed oxygen, so that the adsorption purification and decomposition extraction operations are carried out simultaneously, effectively improving the purification efficiency.

[0035] It should be noted that the first adsorption tower 10, the second adsorption tower 20 and the first pure oxygen tower 30 all have the function of adsorbing oxygen, and their structures can include a tower body and an oxygen adsorbent contained in the tower body. When the oxygen-containing gas is passed into the tower body, the oxygen adsorbent can adsorb oxygen, so that oxygen and other gases can be separated. Among them, there are many options for the oxygen adsorbent, such as: it can be but not limited to carbon molecular sieves, etc. At the same time, there are also many ways to arrange the oxygen adsorbent in the tower body, such as: the oxygen adsorbent is filled in the tower body; or, the oxygen adsorbent is wrapped in the tower body with a filter net, etc.

[0036] In the current oxygen purification step, the conveying component 70 can be selectively connected to the first adsorption tower 10 or the second adsorption tower 20, so that the oxygen-rich raw material is passed into one of the first adsorption tower 10 and the second adsorption tower 20, and the other can be passed into the oxygen-rich raw material in the previous oxygen purification step. At this time, the adsorption tower can perform oxygen analysis under the action of the power device 51, so that the adsorbed oxygen enters the first pure oxygen tower 30 for further adsorption and purification. During the analysis and extraction process, the power device 51 can provide negative pressure to the first adsorption tower 10 or the second adsorption tower 20 through the suction component 52, so that the adsorbed oxygen is extracted. Among them, the power device 51 refers to a device that can provide power for the flow of oxygen or oxygen-containing gas, such as: it can be but not limited to a compressor, a vacuum pump, etc.

[0037] It is not difficult to understand that in order to allow the analyzed oxygen to enter the first pure oxygen tower 30, the first pure oxygen tower 30 can be kept in communication with the discharge assembly 53, and the discharge assembly 53 can be kept disconnected from the first adsorption tower 10 and the second adsorption tower 20, respectively. In this way, the sucked oxygen can pass through the suction assembly 52, the power device 51, a part of the discharge assembly 53 and the first pure oxygen tower 30 in sequence. Among them, the "controlled connection" in this embodiment means that the connection between the two can be controlled so that the two are controlled to remain connected or disconnected. For example: the suction assembly 52 can be controlled to remain connected or disconnected with the first adsorption tower 10; or, the suction assembly 52 can be controlled to remain connected or disconnected with the second adsorption tower 20.

[0038] It should also be noted that, taking the analytical extraction of the second adsorption tower 20 as an example, before extracting the oxygen adsorbed in the second adsorption tower 20, the gas adsorbed in the second adsorption tower 20 can also be pumped into the first pure oxygen tower 30 through the power device 51, so that the adsorbed gas can also be adsorbed and purified by the first pure oxygen tower 30, which is beneficial to improve the oxygen purification rate. When extracting the adsorbed gas and the adsorbed oxygen, the working mode of the power device 51 is different. For example, when extracting the adsorbed gas, the working power of the power device 51 is relatively small; when extracting the adsorbed oxygen, the working power of the power device 51 is relatively large, so that the negative pressure in the second adsorption tower 20 is larger, and it is easier to extract the adsorbed oxygen in the second adsorption tower 20.

[0039] For further information, please refer to Figure 3 The oxygen-enriched air purification device also includes a balance tower 40, which is used to receive the first oxygen-containing gas discharged from the first pure oxygen tower 30 after absorbing oxygen. The balance tower 40 is connected to the suction component 52. When the conveying component 70 controls the oxygen-rich raw material to pass into one of the first adsorption tower 10 and the second adsorption tower 20, the power device 51 is also used to drive the first oxygen-containing gas in the balance tower 40 through the discharge component 53 to pass into one of the first adsorption tower 10 and the second adsorption tower 20 where the oxygen-rich raw material is passed.

[0040] It can be seen that when the adsorbed oxygen is pumped into the first pure oxygen tower 30 under the action of the power device 51, there is still some oxygen-containing gas in the first pure oxygen tower 30, that is, the first oxygen-containing gas. Since the first oxygen-containing gas contains a certain amount of oxygen, the present embodiment introduces a balance tower 40 to flow the first oxygen-containing gas from the first pure oxygen tower 30 into the balance tower 40 in preparation for the next purification operation. At the same time, the first oxygen-containing gas is passed into the balance tower 40 to balance the pressure difference between the first pure oxygen tower 30 and the balance tower 40; it is also convenient to reduce the air pressure in the first pure oxygen tower 30, so that the adsorbed oxygen is more easily sucked into the first pure oxygen tower 30.

[0041] In addition, in order to facilitate the first oxygen-containing gas after oxygen absorption in the first pure oxygen tower 30 to enter the balance tower 40, the original first oxygen-containing gas in the balance tower 40 can be discharged in advance. At this time, the balance tower 40 is controlled to be connected with the suction component 52, and the discharge component 53 is controlled to be connected with the first adsorption tower 10 or the second adsorption tower 20. In this way, under the suction effect of the power device 51, the first oxygen-containing gas in the balance tower 40 flows through the suction component 52, the power device 51 and the discharge component 53 in sequence, and then flows into the first adsorption tower 10 or the second adsorption tower 20. In this way, the adsorption performance of the first adsorption tower 10 or the second adsorption tower 20 can be fully utilized to improve the oxygen purification rate.

[0042] It should be noted that, in oxygen purification, the first adsorption tower 10 and the second adsorption tower 20 are cyclically and alternately fed with oxygen-rich materials. For example, when the first adsorption tower 10 is fed with oxygen-rich materials, the second adsorption tower 20 has already adsorbed oxygen in the previous cycle, and is currently in the oxygen analysis and extraction process; when the second adsorption tower 20 is fed with oxygen-rich materials, the first adsorption tower 10 has already adsorbed oxygen in the previous cycle, and is currently in the oxygen analysis and extraction process.

[0043] Therefore, for ease of understanding, taking the current cycle step in which the first adsorption tower 10 introduces oxygen-rich material and the second adsorption tower 20 is in the oxygen analysis and extraction process as an example, the balance tower 40 can receive the first oxygen-containing gas after absorbing oxygen in the first pure oxygen tower 30. This not only reduces the pressure in the first pure oxygen tower 30, but also allows the second oxygen-containing gas after absorbing oxygen in the second adsorption tower 20 or the adsorbed oxygen to be smoothly drawn into the first pure oxygen tower 30; it also facilitates preparation for the balance tower 40 to introduce the first oxygen-containing gas into the second adsorption tower 20 in the next cycle, thereby improving the oxygen purification rate.

[0044] Among them, the oxygen-rich material refers to the gas to be purified, and its oxygen content can be determined according to the actual process, for example, its oxygen content is greater than or equal to 93%. When the oxygen-rich material enters the first adsorption tower 10, a part of the oxygen of the oxygen-rich material is adsorbed in the first adsorption tower 10, such as adsorbed on the oxygen adsorbent in the first adsorption tower 10; another part of the oxygen is retained in the gas in the first adsorption tower 10, and the gas can be the third oxygen-containing gas; when the oxygen-rich material enters the second adsorption tower 20, a part of the oxygen of the oxygen-rich material is adsorbed in the second adsorption tower 20, such as adsorbed on the oxygen adsorbent in the first adsorption tower 10; another part of the oxygen is retained in the gas in the second adsorption tower 20, and the gas can be the second oxygen-containing gas.

[0045] The first pure oxygen tower 30 may be fed with oxygen adsorbed in the first adsorption tower 10 or the second adsorption tower 20, or may be fed with the third oxygen-containing gas in the first adsorption tower 10 or the second oxygen-containing gas in the second adsorption tower 20. After the above gases are fed into the first pure oxygen tower 30 and oxygen is absorbed, the first oxygen-containing gas may be generated.

[0046] For further information, please refer to Figure 3 The oxygen-enriched air purification device also includes a first pipeline 41, a first control valve 42, a second pipeline 31 and a second control valve 32. The first pipeline 41 is connected between the suction component 52 and the balance tower 40, and the first control valve 42 is arranged on the first pipeline 41 to control between the balance tower 40 and the suction component 52; the second pipeline 31 is connected between the discharge component 53 and the first pure oxygen tower 30, and the second control valve 32 is arranged on the second pipeline 31 to control between the first pure oxygen tower 30 and the discharge component 53.

[0047] It can be seen that, since the balance tower 40 is connected to the suction assembly 52, and the suction assembly 52 is connected to the suction end 511 of the power device 51, the connection position of the balance tower 40 at the suction assembly 52 is located on one side of the suction end 511 of the power device 51, so that the power device 51 can provide suction force for the balance tower 40 through the first pipeline 41. The balance tower 40 is connected to the suction assembly 52, and the suction assembly 52 is connected to the suction end 511 of the power device 51, so the connection position of the first pure oxygen tower 30 at the discharge assembly 53 is located on one side of the discharge end 512 of the power device 51, so that the power device 51 can provide agitation force for the first pure oxygen tower 30 through the second pipeline 31. Such a design allows the first oxygen-containing gas of the balance tower 40 to be smoothly transported outward to further purify the first oxygen-containing gas. At the same time, it is also convenient for the gas or adsorbed oxygen in the first adsorption tower 10 and the second adsorption tower 20 to smoothly enter the first pure oxygen tower 30.

[0048] It should be noted that there are many options for the first control valve 42 and the second control valve 32, as long as they can realize the on-off function between the two components, such as but not limited to pneumatic valves, butterfly valves, ball valves, solenoid valves, etc.

[0049] In some embodiments, please refer to Figure 3 The oxygen-enriched air purification device also includes an idling pipe 54 and a third control valve 55. One end of the idling pipe 54 is connected to the suction assembly 52 and is located on one side of the suction end 511 of the power device 51. The other end of the idling pipe 54 is connected to the second pipeline 31 and is located on the side of the second control valve 32 away from the first pure oxygen tower 30. The third control valve 55 is arranged on the idling pipe 54.

[0050] It can be seen that the two ends of the idling pipe 54 are connected in parallel to the two ends of the power unit 51. When the third control valve 55 is opened and the third control valve 55 is closed, the airflow formed after the power unit 51 is started will circulate between the suction end 511, the discharge end 512 and the idling pipe 54, realizing the idling self-circulation of the power unit 51, and ensuring that the performance of the power unit 51 is in a stable state before working.

[0051] Optionally, the third control valve 55 may be, but is not limited to, a pneumatic valve, a butterfly valve, a ball valve, a solenoid valve, etc.

[0052] In some embodiments, please refer to Figure 2 and Figure 3 The suction assembly 52 includes a suction pipe 521, a first branch pipe 522, a second branch pipe 523, a first on-off valve 524 and a second on-off valve 525. One end of the suction pipe 521 is connected to the suction end 511 of the power device 51, and the other end of the suction pipe 521 is connected to the first branch pipe 522 and the second branch pipe 523 respectively. The first on-off valve 524 is arranged on the first branch pipe 522, and the second on-off valve 525 is arranged on the second branch pipe 523. The first branch pipe 522 is connected to the first adsorption tower 10, the second branch pipe 523 is connected to the second adsorption tower 20, and the balance tower 40 is controlledly connected to the suction pipe 521. With such a design, the selective connection between the first adsorption tower 10 and the second adsorption tower 20 is effectively realized.

[0053] It should be noted that, taking the case where the oxygen-rich material is introduced into the first adsorption tower 10 in the current cycle step and the second adsorption tower 20 is in the oxygen analysis and extraction process as an example, after the oxygen-rich material is introduced into the first adsorption tower 10, the second on-off valve 525 and the second control valve 32 can be opened; of course, in some other embodiments, the second on-off valve 525, the third control valve 55 and the second control valve 32 can also be opened at this time. Then, the second oxygen-containing gas in the second adsorption tower 20 is pumped into the first pure oxygen tower 30 through the power device 51 for further adsorption and purification. Then, the discharge component 53 is controlled to maintain communication with the first adsorption tower 10, and the first control valve 42 is opened, and the other valves can be kept closed. At this time, the first oxygen-containing gas in the balance tower 40 is pumped into the first adsorption tower 10 through the power device 51 for further adsorption and purification; after purification, the first pure oxygen tower 30 is controlled to maintain communication with the balance tower 40, and the second on-off valve 525 and the second control valve 32 are opened, and the oxygen adsorbed in the second adsorption tower 20, such as the oxygen adsorbed on the oxygen adsorbent, is pumped into the first pure oxygen tower 30 through the power device 51, and the first oxygen-containing gas in the first pure oxygen tower 30 is discharged into the balance tower 40; after being discharged into the balance tower 40, on the basis of the previous step, the discharge component 53 is controlled to maintain communication with the first adsorption tower 10, so that a part of the oxygen enters the first adsorption tower 10, thereby improving the adsorption utilization rate of the first adsorption tower 10.

[0054] In some embodiments, please refer to Figure 3 The oxygen-enriched air purification device further includes a first connecting pipe 60, a second connecting pipe 61, a third on-off valve 62, a fourth on-off valve 63 and a throttle valve 64. The first connecting pipe 60 and the second connecting pipe 61 are connected in parallel between the first pure oxygen tower 30 and the balance tower 40. The third on-off valve 62 is provided in the first connecting pipe 60, and the fourth on-off valve 63 and the throttle valve 64 are both provided in the second connecting pipe 61. It can be seen that the first connecting pipe 60 and the second connecting pipe 61 are connected in parallel between the first pure oxygen tower 30 and the balance tower 40 to realize the fast and slow flow of the airflow between the first pure oxygen tower 30 and the second balance tower 40, which is convenient for the oxygen purification process to be stable and effective, and is conducive to improving the oxygen purification rate.

[0055] It should be noted that, still taking the case where the oxygen-rich material is introduced into the first adsorption tower 10 in the current cycle step and the second adsorption tower 20 is in the oxygen analysis and extraction process as an example, when the power device 51 draws the oxygen adsorbed in the second adsorption tower 20 into the first pure oxygen tower 30, the fourth on-off valve 63 and the throttle valve 64 can be opened, so that the first oxygen-containing gas in the first pure oxygen tower 30 slowly flows into the balance tower 40. Since the power device 51 needs to draw the oxygen adsorbed in the first adsorption tower 10 or the second adsorption tower 20 into the first pure oxygen tower 30, the operating power of the power device 51 is relatively higher, and the negative pressure formed in the second adsorption tower 20 is greater. At this time, opening the fourth on-off valve 63 and the throttle valve 64 can slow down the flow of oxygen in the first pure oxygen tower 30, prolong the oxygen adsorption time, and help improve the purification rate.

[0056] After a period of pumping (depending on the amount of oxygen-rich raw material processed in one cycle), the discharge assembly 53 can be controlled to remain connected to the first adsorption tower 10, so that a portion of the first oxygen-containing gas is discharged from the balance tower 40 into the first adsorption tower 10; then, the third on-off valve 62 is opened to accelerate the gas flow between the first pure oxygen tower 30 and the balance tower 40, so that the pressure between the two reaches a balance.

[0057] It should also be noted that the throttle valve 64 refers to a valve structure that can adjust the flow in the second connecting pipe 61, for example, it can be but is not limited to a ball valve.

[0058] In addition, to facilitate the connection between the first connecting pipe 60 and the second connecting pipe 61, a first flow pipe 35 can be connected to the first pure oxygen tower 30, and a second flow pipe 43 can be connected to the balance tower 40. The first connecting pipe 60 and the second connecting pipe 61 are connected in parallel between the first flow pipe 35 and the second flow pipe 43.

[0059] In some embodiments, please refer to Figure 2 and Figure 3 The discharge assembly 53 includes a discharge pipe 531, a first branch pipe 532, a second branch pipe 533, a fifth on-off valve 534 and a sixth on-off valve 535. One end of the discharge pipe 531 is connected to the discharge end 512 of the power device 51, and the other end is respectively connected to the first branch pipe 532 and the second branch pipe 533. The fifth on-off valve 534 is arranged on the first branch pipe 532, and the sixth on-off valve 535 is arranged on the second branch pipe 533. The first branch pipe 532 is connected to the first adsorption tower 10, the second branch pipe 533 is connected to the second adsorption tower 20, and the first pure oxygen tower 30 is controllably connected to the discharge pipe 531. Such a design facilitates the selective communication between the discharge assembly 53 and the first adsorption tower 10 and the second adsorption tower 20, so as to facilitate further purification and improve the adsorption utilization rate in the first adsorption tower 10 or the second adsorption tower 20.

[0060] It should be noted that the first on-off valve 524, the second on-off valve 525, the third on-off valve 62, the fourth on-off valve 63, the fifth on-off valve 534 and the sixth on-off valve 535 are all valve structures for on-off control of their respective channels, and they can be but are not limited to pneumatic valves, butterfly valves, ball valves, solenoid valves, etc.

[0061] In some embodiments, please refer to Figure 3 The oxygen-enriched air purification device also includes a second pure oxygen tower 90 for absorbing moisture in oxygen, a collecting pipe 91, a recovery pipe 33, a fourth control valve 92 and a fifth control valve 34. One end of the collecting pipe 91 is connected to the discharge assembly 53, and the other end is connected to the second pure oxygen tower 90. One end of the recovery pipe 33 is connected to the suction assembly 52, and the other end is connected to the first pure oxygen tower 30. The fourth control valve 92 is arranged on the collecting pipe 91, and the fifth control valve 34 is arranged on the recovery pipe 33. It can be seen that since one end of the recovery pipe 33 is connected to the suction assembly 52, the recovery pipe 33 is equivalent to being connected to the suction end 511 of the power device 51. Therefore, after the power device 51 is working, the oxygen adsorbed in the first pure oxygen pipe can be sequentially flowed from the recovery pipe 33, the suction assembly 52, the suction end 511, the discharge end 512, the discharge assembly 53 and the collecting pipe 91 into the second pure oxygen tower 90 for drying and storage to obtain oxygen with the required purity.

[0062] At the same time, during suction, the suction assembly 52 can be controlled to maintain communication with the second adsorption tower 20 , that is, the second on-off valve 525 is opened so that the oxygen adsorbed in the second adsorption tower 20 is sucked into the second pure oxygen tower 90 .

[0063] It should be noted that the second pure oxygen tower 90 refers to a structure that can dry oxygen and absorb moisture in oxygen, which may include a tower body and a desiccant contained in the tower body, wherein the desiccant may be selected from a variety of options, such as but not limited to aluminum oxide, calcium chloride, etc.

[0064] When extracting oxygen from the second adsorption tower 20 and the first pure oxygen tower 30 respectively, the discharge assembly 53 can be synchronously controlled to keep connected with the first adsorption tower 10, so that part of the oxygen is blown into the first adsorption tower 10, and part of the residual exhaust gas in the first adsorption tower 10 is emptied by oxygen, thereby ensuring that the oxygen concentration in the first adsorption tower 10 is higher, preparing for the next cycle.

[0065] In addition, the oxygen-enriched air purification device may further include an oxygen storage tank 93 and a seventh on-off valve 94, and the oxygen storage tank 93 is connected to the second pure oxygen tower 90 via the seventh on-off valve 94. Thus, by opening the seventh on-off valve 94, the oxygen in the second pure oxygen tower 90 flows into the oxygen storage tank 93.

[0066] It should also be noted that when the first pure oxygen tower 30 is connected to the discharge assembly 53 through the second pipeline 31, and the second control valve 32 is arranged on the second pipeline 31, one end of the recovery pipe 33 can be connected between the second control valve 32 and the first pure oxygen tower 30. In this way, when extracting oxygen, the fifth control valve 34 can be opened and the second control valve 32 can be closed. In this way, while the oxygen in the first pure oxygen tower 30 is sucked, part of the oxygen is prevented from flowing back from the second pipeline 31 into the first pure oxygen tower 30, causing the oxygen extraction to be unable to be carried out stably.

[0067] In some embodiments, please refer to Figure 2 The delivery assembly 70 includes a delivery pipe 71, a first pipe fitting 72, a second pipe fitting 73, a sixth control valve 74 and a seventh control valve 75. One end of the delivery pipe 71 is connected to the first pipe fitting 72 and the second pipe fitting 73 respectively, and the other end is used to connect to an oxygen-enriched tank 76 storing oxygen-enriched raw materials. The sixth control valve 74 is provided on the first pipe fitting 72, and the seventh control valve 75 is provided on the second pipe fitting 73. The first pipe fitting 72 is connected to the first adsorption tower 10, and the second pipe fitting 73 is connected to the second adsorption tower 20. It can be seen that when the sixth control valve 74 is opened, the first adsorption tower 10 is connected to the delivery pipe 71 through the first pipe fitting 72; when the seventh control valve 75 is opened, the second adsorption tower 20 is connected to the delivery pipe 71 through the second pipe fitting 73. With such a design, the oxygen-enriched raw materials can be selectively introduced into the first adsorption tower 10 or the second adsorption tower 20.

[0068] The sixth control valve 74 and the seventh control valve 75 may be, but are not limited to, pneumatic valves, butterfly valves, ball valves, solenoid valves, etc.

[0069] In some embodiments, please refer to Figure 2 The oxygen-enriched air purification device further includes a waste discharge assembly 80, which is controllably connected to the first adsorption tower 10 and the second adsorption tower 20. Thus, the waste gas in the first adsorption tower 10 and the second adsorption tower 20 is discharged in time through the waste discharge assembly 80.

[0070] For specific embodiments, please refer to Figure 2 The waste discharge assembly 80 includes a first waste discharge valve 83, a second waste discharge valve 84, a first waste discharge branch pipe 81, a second waste discharge branch pipe 82 and a waste discharge main pipe 85. The first waste discharge branch pipe 81 and the second waste discharge branch pipe 82 are respectively connected to the first adsorption tower 10 and the second adsorption tower 20, and both are connected to the waste discharge main pipe 85. The first waste discharge valve 83 is arranged on the first waste discharge branch pipe 81, and the second waste discharge valve 84 is arranged on the second waste discharge branch pipe 82. The first waste discharge valve 83 and the second waste discharge valve 84 can be, but not limited to, pneumatic valves, butterfly valves, ball valves, solenoid valves, etc.

[0071] In order to facilitate the connection with the first adsorption tower 10 and the second adsorption tower 20 respectively, the first adsorption tower 10 may be connected with a first flow guide pipe 11, the second adsorption tower 20 may be connected with a second flow guide pipe 21, one end of the first pipe 72, one end of the first branch pipe 522 and one end of the first branch pipe 532 are connected in parallel to the first flow guide pipe 11, and one end of the second pipe 73, one end of the second branch pipe 523 and one end of the second branch pipe 533 are connected in parallel to the second flow guide pipe 21. At the same time, in order to ensure that the first adsorption tower 10 and the second adsorption tower 20 are kept under equal pressure before adsorption, the oxygen-enriched air purification device also includes a first equalizing pipe 12, a first equalizing valve 13, a second equalizing pipe 22 and a second equalizing valve 23, one end of the first equalizing pipe 12 is connected to the first flow guide pipe 11, and the other end is connected to the second waste pipe, one end of the second equalizing pipe 22 is connected to the second flow guide pipe 21, and the other end is connected to the first waste pipe. The first pressure equalizing valve 13 is provided on the first pressure equalizing pipe 12, and the second pressure equalizing valve 23 is provided on the second pressure equalizing pipe 22. In addition, in order to facilitate pressure monitoring of the first adsorption tower 10, the second adsorption tower 20, the first pure oxygen tower 30, the balance tower 40 and the second pure oxygen tower 90, pressure sensors can be provided on the respective equipment.

[0072] To facilitate understanding of the working principle of the oxygen-enriched air purification device of the present application, the following specific steps may be referred to:

[0073] In this embodiment, the oxygen-enriched air purification device can cyclically and alternately perform the first purification step and the second purification step. Figure 2 and Figure 3 , in a first purification step:

[0074] 1. Open the first pressure equalizing valve 13 and the third control valve 55, and provide power through the power device 51, so that the pressure between the first adsorption tower 10 and the second adsorption tower 20 is equalized, and the power device 51 is self-circulated through the idling pipe 54.

[0075] 2. Open the sixth control valve 74, the second on-off valve 525, the first exhaust valve 83, the third control valve 55 and the second control valve 32, and the other valves can be in a closed state. At this time, the oxygen-rich raw material enters the first adsorption tower 10, and the second oxygen-containing gas in the second adsorption tower 20 is pumped into the first pure oxygen tower 30 through the power device 51; at the same time, the exhaust gas in the first adsorption tower 10 is discharged through the first exhaust valve 83.

[0076] 3. Open the fifth on-off valve 534, the first exhaust valve 83, and the first control valve 42, and the other valves can be in a closed state. At this time, the first oxygen-containing gas in the balance tower 40 enters the first adsorption tower 10 through the discharge pipe 531 under the action of the power device 51 for further adsorption and purification.

[0077] 4. Open the second on-off valve 525, the first waste valve 83, the second control valve 32, the fourth on-off valve 63 and the throttle valve 64. Driven by the power device 51, the adsorbed oxygen in the second adsorption tower 20 is drawn into the first pure oxygen tower 30; at the same time, the first oxygen-containing gas in the first pure oxygen tower 30 slowly flows into the balance tower 40 through the second connecting pipe 61.

[0078] 5. On the basis of step 4, the fifth on-off valve 534 is opened to allow a portion of oxygen to be drawn into the first adsorption tower 10, thereby improving the adsorption utilization rate in the first adsorption tower 10.

[0079] 6. On the basis of step 5, the third on-off valve 62 is opened to speed up the gas flow between the first pure oxygen tower 30 and the balance tower 40 so that the pressures of the two are equal.

[0080] 7. Open the second on-off valve 525, the first exhaust valve 83, the fifth control valve 34 and the fourth control valve 92. Driven by the power device 51, the oxygen adsorbed in the second adsorption tower 20 and the oxygen adsorbed in the first pure oxygen tower 30 enter the second pure oxygen tower 90.

[0081] 8. On the basis of step 5, the fifth on-off valve 534 is opened to blow part of the oxygen into the first adsorption tower 10, and the exhaust gas in the first adsorption tower 10 is blown out to ensure that the oxygen concentration in the first adsorption tower 10 is higher.

[0082] In the second purification step:

[0083] 1. Open the second pressure equalizing valve 23 and the third control valve 55, and provide power through the power device 51, so that the pressure between the first adsorption tower 10 and the second adsorption tower 20 is equalized, and the power device 51 self-circulates through the idling pipe 54.

[0084] 2. Open the seventh control valve 75, the first on-off valve 524, the second exhaust valve 84, the third control valve 55 and the second control valve 32, and the other valves can be in a closed state. At this time, the oxygen-rich raw material enters the second adsorption tower 20, and the third oxygen-containing gas in the first adsorption tower 10 is pumped into the first pure oxygen tower 30 through the power device 51; at the same time, the exhaust gas in the second adsorption tower 20 is discharged through the second exhaust valve 84.

[0085] 3. Open the sixth on-off valve 535, the second exhaust valve 84, and the first control valve 42, and the other valves can be in a closed state. At this time, the first oxygen-containing gas in the balance tower 40 enters the second adsorption tower 20 through the discharge pipe 531 under the action of the power device 51 for further adsorption and purification.

[0086] 4. Open the first on-off valve 524, the second exhaust valve 84, the second control valve 32, the fourth on-off valve 63 and the throttle valve 64. Driven by the power device 51, the adsorbed oxygen in the first adsorption tower 10 is drawn into the first pure oxygen tower 30; at the same time, the first oxygen-containing gas in the first pure oxygen tower 30 slowly flows into the balance tower 40 through the second connecting pipe 61.

[0087] 5. On the basis of step 4, the sixth on-off valve 535 is opened to allow a portion of oxygen to be drawn into the second adsorption tower 20, thereby improving the adsorption utilization rate in the second adsorption tower 20.

[0088] 6. On the basis of step 5, the third on-off valve 62 is opened to speed up the gas flow between the first pure oxygen tower 30 and the balance tower 40 so that the pressures of the two are equal.

[0089] 7. Open the first on-off valve 524, the second exhaust valve 84, the fifth control valve 34 and the fourth control valve 92. Driven by the power device 51, the oxygen adsorbed in the first adsorption tower 10 and the oxygen adsorbed in the first pure oxygen tower 30 enter the second pure oxygen tower 90.

[0090] 8. On the basis of step 5, the sixth on-off valve 535 is opened to blow part of the oxygen into the second adsorption tower 20, and the exhaust gas in the second adsorption tower 20 is blown out to ensure that the oxygen concentration in the second adsorption tower 20 is higher.

[0091] In some embodiments, the first adsorption tower 10, the second adsorption tower 20 and the first pure oxygen tower 30 all include a tower body and a carbon molecular sieve contained in the tower body. It can be seen that the carbon molecular sieve refers to a non-polar carbon material that can effectively adsorb oxygen. There are many ways to fix the carbon molecular sieve in the tower body, such as: filling, wrapping with a filter net, etc. Since the way the carbon molecular sieve is fixed in the tower body is not the object of improvement in this embodiment, the internal structure of the first adsorption tower 10, the second adsorption tower 20 and the first pure oxygen tower 30 will not be introduced in detail. In this way, the use of carbon molecular sieves to purify oxygen-enriched air can reduce the purification cost; at the same time, it can also reduce the production of by-products, which is more environmentally friendly and efficient.

[0092] In some embodiments, please refer to Figure 4 The present application provides an oxygen-enriched air purification control method, using any of the above oxygen-enriched air purification devices, the method includes cyclically and alternately performing a first purification step and a second purification step; wherein the first purification step includes:

[0093] S100, controlling the conveying assembly 70 to communicate with the first adsorption tower 10, so that the oxygen-rich material passes into the first adsorption tower 10;

[0094] S110, controlling the suction assembly 52 to communicate with the second adsorption tower 20, and the discharge assembly 53 to communicate with the first pure oxygen tower 30, and controlling the power device 51 to operate in the first mode, so that the oxygen adsorbed in the second adsorption tower 20 enters the first pure oxygen tower 30;

[0095] S120, controlling the first pure oxygen tower 30 to communicate with the suction assembly 52, and the discharge assembly 53 to communicate with the second pure oxygen tower 90, and controlling the power device 51 to work in the first mode, so that the oxygen adsorbed in the second adsorption tower 20 and the oxygen adsorbed in the first pure oxygen tower 30 enter the second pure oxygen tower 90;

[0096] The second purification step comprises:

[0097] S200, controlling the conveying assembly 70 to communicate with the second adsorption tower 20, so that the oxygen-rich material is passed into the second adsorption tower 20;

[0098] S210, controlling the suction assembly 52 to communicate with the first adsorption tower 10, and the discharge assembly 53 to communicate with the first pure oxygen tower 30, and controlling the power device 51 to operate in the first mode, so that the oxygen adsorbed in the first adsorption tower 10 enters the first pure oxygen tower 30;

[0099] S220, control the first pure oxygen tower 30 to be connected with the suction component 52, and the discharge component 53 to be connected with the second pure oxygen tower 90, and control the power device 51 to operate in the first mode, so that the oxygen adsorbed in the first adsorption tower 10 and the oxygen adsorbed in the first pure oxygen tower 30 enter the second pure oxygen tower 90.

[0100] The above-mentioned oxygen-enriched air purification control method adopts the above oxygen-enriched air purification device. During the oxygen production process, the conveying component 70 can be selected to be connected to one of the first adsorption tower 10 and the second adsorption tower 20, so that the oxygen-enriched raw material enters one of the first adsorption tower 10 and the second adsorption tower 20 to adsorb the oxygen in the oxygen-enriched raw material. After the oxygen-enriched raw material is introduced into one of the first adsorption tower 10 and the second adsorption tower 20, the other can, under the action of the power device 51, pass the adsorbed oxygen into the first pure oxygen tower 30 for further adsorption and purification to obtain oxygen with higher purity. Since the oxygen-enriched air purification device of the present application utilizes the oxygen adsorption function of the first adsorption tower 10, the second adsorption tower 20 and the first pure oxygen tower 30 to complete the oxygen purification, relative to the traditional oxygen production technology, the oxygen production process is simple, and can effectively provide a more convenient way for small pure oxygen users to meet the requirements of production at any time and on demand. At the same time, during the purification process, the first adsorption tower 10 and the second adsorption tower 20 can be used alternately, one of which is in the process of adsorbing oxygen and the other is in the process of decomposing the adsorbed oxygen, so that the adsorption purification and decomposition extraction operations are carried out simultaneously, effectively improving the purification efficiency.

[0101] It should be noted that the first mode refers to a mode in which the power unit 51 can draw the adsorbed oxygen in the first adsorption tower 10 or the second adsorption tower 20 into the first pure oxygen tower 30. In this mode, the operating power of the power unit 51 can be relatively high. For example, the power unit 51 is a compressor. In the first mode, the power unit 51 can provide negative pressure to the first adsorption tower 10 or the second adsorption tower 20. The negative pressure value can be determined according to the actual process. For example, the negative pressure value in the first adsorption tower 10 or the second adsorption tower 20 can be but not limited to 0~-0.05MPa.

[0102] It should also be noted that the steps in this embodiment may correspond to the control methods of the various valves in the above embodiments, for example: in step S100, at least the sixth control valve 74 and the first exhaust valve 83 may be opened; in step S110, at least the second on-off valve 525 and the second control valve 32 may be opened; in step S120, at least the second on-off valve 525, the fifth control valve 34 and the fourth control valve 92 may be opened. In step S200, at least the seventh control valve 75 and the second exhaust valve 84 may be opened; in step S210, at least the first on-off valve 524 and the second control valve 32 may be opened; in step S220, at least the first on-off valve 524, the fifth control valve 34 and the fourth control valve 92 may be opened.

[0103] In addition, when executing step S120, the discharge assembly 53 can be controlled to maintain communication with the first adsorption tower 10, that is, the fifth on-off valve 534 is opened, so that a portion of oxygen is blown into the first adsorption tower 10 to blow out the exhaust gas in the first adsorption tower 10, and ensure that the first adsorption tower 10 has a higher oxygen concentration. At the same time, when executing step S220, the discharge assembly 53 can be controlled to maintain communication with the second adsorption tower 20, that is, the sixth on-off valve 535 is opened, so that a portion of oxygen is blown into the second adsorption tower 20 to blow out the exhaust gas in the second adsorption tower 20, and ensure that the second adsorption tower 20 has a higher oxygen concentration.

[0104] In some embodiments, please refer to Figure 5 In the first purification step, before the step of controlling the suction component 52 to communicate with the second adsorption tower 20 and the discharge component 53 to communicate with the first pure oxygen tower 30, the following steps are also included:

[0105] S130, controlling the suction assembly 52 to communicate with the second adsorption tower 20, and the discharge assembly 53 to communicate with the first pure oxygen tower 30, and controlling the power device 51 to operate in the second mode, so that the second oxygen-containing gas after oxygen absorption in the second adsorption tower 20 enters the first pure oxygen tower 30;

[0106] S140 , controlling the discharge component 53 to communicate with the first adsorption tower 10 , and the suction component 52 to communicate with the balance tower 40 , so that the first oxygen-containing gas in the balance tower 40 enters the first adsorption tower 10 .

[0107] It can be seen that the first oxygen-containing gas in the equilibrium tower 40 is discharged into the first adsorption tower 10 to further adsorb and purify the gas, so as to fully utilize the adsorption capacity of the first adsorption tower 10.

[0108] It should be noted that after step S110, the first pure oxygen tower 30 and the balance tower 40 can be controlled to remain connected, for example: the fourth on-off valve 63 and the third on-off valve 62 are opened in sequence, so that the first oxygen-containing gas in the first pure oxygen tower 30 flows into the balance tower 40, preparing for the next cycle.

[0109] In addition, the second mode refers to a mode in which the power unit 51 is able to draw the oxygen-containing gas stored in the first adsorption tower 10 or the second adsorption tower 20 into the first pure oxygen tower 30. In this mode, the operating power of the power unit 51 can be relatively low. For example, the power unit 51 is a compressor. In the second mode, the power unit 51 can provide negative pressure to the first adsorption tower 10 or the second adsorption tower 20. The negative pressure value can be determined according to the actual process. For example, the negative pressure value in the first adsorption tower 10 or the second adsorption tower 20 (relative to 1 atmosphere) can be but not limited to 0~0.5MPa.

[0110] In some embodiments, please refer to Figure 5 In the second purification step, before the step of controlling the suction component 52 to communicate with the first adsorption tower 10 and the discharge component 53 to communicate with the first pure oxygen tower 30, the following steps are also included:

[0111] S230, controlling the suction assembly 52 to communicate with the first adsorption tower 10, and the discharge assembly 53 to communicate with the first pure oxygen tower 30, and controlling the power device 51 to work in the first mode, so that the third oxygen-containing gas after absorbing oxygen in the first adsorption tower 10 enters the first pure oxygen tower 30;

[0112] S240 , controlling the discharge component 53 to communicate with the second adsorption tower 20 , and the suction component 52 to communicate with the balance tower 40 , so that the first oxygen-containing gas in the balance tower 40 enters the second adsorption tower 20 .

[0113] It can be seen that the first oxygen-containing gas in the equilibrium tower 40 is discharged into the second adsorption tower 20 to further adsorb and purify the gas, so as to fully utilize the adsorption capacity of the second adsorption tower 20.

[0114] It should be noted that after step S210, the first pure oxygen tower 30 and the balance tower 40 may also be controlled to remain connected, for example: the fourth on-off valve 63 and the third on-off valve 62 are opened in sequence, so that the first oxygen-containing gas in the first pure oxygen tower 30 flows into the balance tower 40, in preparation for the next cycle. For details, reference may be made to the connection method between the first pure oxygen tower 30 and the balance tower 40 in the above embodiment.

[0115] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0116] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An oxygen-enriched air purification device, characterized in that: The oxygen-enriched air purification device comprises: The first adsorption tower (10), the second adsorption tower (20) and the first pure oxygen tower (30) are all used to adsorb oxygen; A conveying component (70) for controlling the selective introduction of the oxygen-enriched raw material into the first adsorption tower (10) and the second adsorption tower (20); A power mechanism (50) comprises a power device (51), a suction assembly (52) connected to a suction end (511) of the power device (51), and a discharge assembly (53) connected to a discharge end (512) of the power device (51), wherein either the suction assembly (52) or the discharge assembly (53) is controllably connected to the first adsorption tower (10) and the second adsorption tower (20), and the first pure oxygen tower (30) is connected to the discharge assembly (53); Wherein, when the conveying component (70) controls the oxygen-rich raw material to pass into one of the first adsorption tower (10) and the second adsorption tower (20), the power device (51) is used at least to drive the oxygen adsorbed in the other of the first adsorption tower (10) and the second adsorption tower (20) to pass into the first pure oxygen tower (30) through the suction component (52).

2. The oxygen-enriched air purification device according to claim 1, characterized in that: The oxygen-enriched air purification device further comprises a balance tower (40), wherein the balance tower (40) is used to receive the first oxygen-containing gas discharged from the first pure oxygen tower (30) after absorbing oxygen. The balance tower (40) is connected to the suction assembly (52). When the conveying assembly (70) controls the oxygen-enriched raw material to pass into one of the first adsorption tower (10) and the second adsorption tower (20), the power device (51) is further used to drive the first oxygen-containing gas in the balance tower (40) to pass into one of the first adsorption tower (10) and the second adsorption tower (20) through the discharge assembly (53).

3. The oxygen-enriched air purification device according to claim 2, characterized in that: The oxygen-enriched air purification device further comprises a first pipeline (41), a first control valve (42), a second pipeline (31) and a second control valve (32); the first pipeline (41) is connected between the suction component (52) and the balancing tower (40); the first control valve (42) is arranged on the first pipeline (41) for controlling the flow between the balancing tower (40) and the suction component (52); the second pipeline (31) is connected between the discharge component (53) and the first pure oxygen tower (30); the second control valve (32) is arranged on the second pipeline (31) for controlling the flow between the first pure oxygen tower (30) and the discharge component (53).

4. The oxygen-enriched air purification device according to claim 3, characterized in that: The oxygen-enriched air purification device further comprises an idling pipe (54) and a third control valve (55); one end of the idling pipe (54) is connected to the suction assembly (52) and is located on one side of the suction end (511) of the power device (51); the other end of the idling pipe (54) is connected to the second pipeline (31) and is located on a side of the second control valve (32) away from the first pure oxygen tower (30); and the third control valve (55) is arranged on the idling pipe (54).

5. The oxygen-enriched air purification device according to claim 2, characterized in that: The suction assembly (52) comprises a suction pipe (521), a first branch pipe (522), a second branch pipe (523), a first on-off valve (524) and a second on-off valve (525); one end of the suction pipe (521) is connected to the suction end (511) of the power device (51); the other end of the suction pipe (521) is connected to the first branch pipe (522) and the second branch pipe (523), respectively; the first on-off valve (524) is arranged on the first branch pipe (522); the second on-off valve (525) is arranged on the second branch pipe (523); the first branch pipe (522) is connected to the first adsorption tower (10); the second branch pipe (523) is connected to the second adsorption tower (20); the balancing tower (40) is controllably connected to the suction pipe (521); and / or, The oxygen-enriched air purification device further comprises a first connecting pipe (60), a second connecting pipe (61), a third on-off valve (62), a fourth on-off valve (63) and a throttle valve (64); the first connecting pipe (60) and the second connecting pipe (61) are connected in parallel between the first pure oxygen tower (30) and the balance tower (40); the third on-off valve (62) is arranged on the first connecting pipe (60); and the fourth on-off valve (63) and the throttle valve (64) are both arranged on the second connecting pipe (61).

6. The oxygen-enriched air purification device according to claim 1, characterized in that: The discharge assembly (53) comprises a discharge pipe (531), a first branch pipe (532), a second branch pipe (533), a fifth on-off valve (534) and a sixth on-off valve (535); one end of the discharge pipe (531) is connected to the discharge end (512) of the power device (51), and the other end is respectively connected to the first branch pipe (532) and the second branch pipe (533); the fifth on-off valve (534) is arranged on the first branch pipe (532), and the sixth on-off valve (535) is arranged on the second branch pipe (533); the first branch pipe (532) is connected to the first adsorption tower (10), the second branch pipe (533) is connected to the second adsorption tower (20), and the first pure oxygen tower (30) is controllably connected to the discharge pipe (531); and / or, The oxygen-enriched air purification device further comprises a second pure oxygen tower (90) for absorbing moisture in oxygen, a collecting pipe (91), a recovery pipe (33), a fourth control valve (92) and a fifth control valve (34); one end of the collecting pipe (91) is connected to the discharge assembly (53), and the other end is connected to the second pure oxygen tower (90); one end of the recovery pipe (33) is connected to the suction assembly (52), and the other end is connected to the first pure oxygen tower (30); the fourth control valve (92) is arranged on the collecting pipe (91), and the fifth control valve (34) is arranged on the recovery pipe (33).

7. The oxygen-enriched air purification device according to any one of claims 1 to 6, characterized in that: The delivery assembly (70) comprises a delivery pipe (71), a first pipe fitting (72), a second pipe fitting (73), a sixth control valve (74) and a seventh control valve (75); one end of the delivery pipe (71) is connected to the first pipe fitting (72) and the second pipe fitting (73) respectively, and the other end is used to be connected to an oxygen-enriched tank (76) storing the oxygen-enriched raw material; the sixth control valve (74) is arranged on the first pipe fitting (72); the seventh control valve (75) is arranged on the second pipe fitting (73); the first pipe fitting (72) is connected to the first adsorption tower (10); the second pipe fitting (73) is connected to the second adsorption tower (20); and / or, The oxygen-enriched air purification device further comprises a waste discharge component (80), wherein the waste discharge component (80) is controllably connected to the first adsorption tower (10) and the second adsorption tower (20), respectively; and / or, The first adsorption tower (10), the second adsorption tower (20) and the first pure oxygen tower (30) all comprise a tower body and a carbon molecular sieve accommodated in the tower body.

8. An oxygen-enriched air purification control method, using the oxygen-enriched air purification device according to any one of claims 1 to 7, characterized in that: The method comprises cyclically and alternately performing a first purification step and a second purification step; Wherein, the first purification step comprises: Controlling the conveying assembly (70) to communicate with the first adsorption tower (10) so that the oxygen-rich material flows into the first adsorption tower (10); Controlling the suction component (52) to communicate with the second adsorption tower (20), and the discharge component (53) to communicate with the first pure oxygen tower (30), and controlling the power device (51) to operate in a first mode, so that the oxygen adsorbed in the second adsorption tower (20) enters the first pure oxygen tower (30); Controlling the first pure oxygen tower (30) to be in communication with the suction assembly (52), and the discharge assembly (53) to be in communication with the second pure oxygen tower (90), and controlling the power device (51) to operate in the first mode, so that the oxygen adsorbed in the second adsorption tower (20) and the oxygen adsorbed in the first pure oxygen tower (30) enter the second pure oxygen tower (90); The second purification step comprises: Controlling the conveying assembly (70) to communicate with the second adsorption tower (20) so that the oxygen-rich material flows into the second adsorption tower (20); Controlling the suction component (52) to communicate with the first adsorption tower (10), and the discharge component (53) to communicate with the first pure oxygen tower (30), and controlling the power device (51) to operate in a first mode, so that the oxygen adsorbed in the first adsorption tower (10) enters the first pure oxygen tower (30); The first pure oxygen tower (30) is controlled to be in communication with the suction assembly (52), and the discharge assembly (53) is controlled to be in communication with the second pure oxygen tower (90), and the power device (51) is controlled to operate in the first mode, so that the oxygen adsorbed in the first adsorption tower (10) and the oxygen adsorbed in the first pure oxygen tower (30) enter the second pure oxygen tower (90).

9. The oxygen-enriched air purification control method according to claim 8, characterized in that: In the first purification step, before the step of controlling the suction component (52) to be connected to the second adsorption tower (20) and the discharge component (53) to be connected to the first pure oxygen tower (30), the following steps are also included: Controlling the suction component (52) to communicate with the second adsorption tower (20), and the discharge component (53) to communicate with the first pure oxygen tower (30), and controlling the power device (51) to operate in a second mode, so that the second oxygen-containing gas after absorbing oxygen in the second adsorption tower (20) enters the first pure oxygen tower (30); The discharge component (53) is controlled to be in communication with the first adsorption tower (10), and the suction component (52) is controlled to be in communication with the balance tower (40), so that the first oxygen-containing gas in the balance tower (40) enters the first adsorption tower (10).

10. The oxygen-enriched air purification control method according to claim 8, characterized in that: In the second purification step, before the step of controlling the suction component (52) to be connected to the first adsorption tower (10) and the discharge component (53) to be connected to the first pure oxygen tower (30), the method further includes: Controlling the suction component (52) to be in communication with the first adsorption tower (10), and the discharge component (53) to be in communication with the first pure oxygen tower (30), and controlling the power device (51) to operate in a first mode, so that the third oxygen-containing gas after absorbing oxygen in the first adsorption tower (10) enters the first pure oxygen tower (30); The discharge component (53) is controlled to be in communication with the second adsorption tower (20), and the suction component (52) is controlled to be in communication with the balance tower (40), so that the first oxygen-containing gas in the balance tower (40) enters the second adsorption tower (20).

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