Oxygen production device

Abstract

The utility model discloses an oxygen production device which comprises an adsorption type drying machine, an oxygen generation device, an oxygen generation device and an oxygen generation device, wherein an air exhaust port and a desorption gas inlet are formed on the adsorption type drying machine; an adsorbent is arranged in the PSA oxygen generator, a gas inlet, an oxygen discharge outlet and a nitrogen discharge outlet are formed in the PSA oxygen generator, and the gas inlet is communicated with the air discharge outlet; the oxygen storage tank is configured to be used for storing oxygen discharged from an oxygen discharge port of the PSA oxygen generator; and an inlet end and an outlet end are formed on the nitrogen storage tank, the inlet end is communicated with the nitrogen discharge port through a nitrogen collection pipeline, the outlet end is communicated with the desorption gas inlet, and the nitrogen storage tank is configured to be used for storing nitrogen discharged from the nitrogen discharge port and providing nitrogen for the adsorption type dryer for desorption of the drying agent. Nitrogen discharged by the PSA oxygen generator enters the nitrogen storage tank to be stored, nitrogen is provided for the adsorption type drying machine to conduct desorption regeneration of the drying agent, recycling of the nitrogen is achieved, and consumption of compressed air by the whole oxygen generation device is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of oxygen generators, in particular to an oxygen generator. Background Art

[0002] Ozone has very strong oxidizing properties. It can not only quickly kill harmful pathogens such as bacteria, fungi, mycoplasma and even viruses, but also does not produce secondary pollution during the disinfection and sterilization process. It is widely used in industrial wastewater treatment, tap water disinfection, food processing and other fields. The gas used to produce ozone must be oxygen or a gas containing oxygen. The gas should contain as few impurities as possible such as moisture, dust, oil, and hydrocarbons. Pressure swing adsorption is often used in industry to produce oxygen. The PSA oxygen generator uses dual-tower adsorption. By controlling the opening and closing of the pneumatic pipeline valves, the dual-tower alternating cycle of adsorption and desorption is achieved, thereby obtaining continuous high-purity oxygen. Nitrogen is desorbed from the tower and discharged to the outside.

[0003] After drying, compressed air entering an adsorption dryer is partially used to supply air to the PSA oxygen generator, while the remaining portion is used as regeneration air for the adsorption dryer itself. This results in significant compressed air consumption throughout the oxygen generator, increasing energy consumption and operating costs. This utility model addresses the technical challenge of designing a technology that can reduce compressed air consumption, energy consumption, and operating costs throughout the oxygen generator. Utility Model Content

[0004] The utility model provides an oxygen production device, which reduces the consumption of compressed air by the entire oxygen production device, and reduces energy consumption and operation and maintenance costs.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] The utility model provides an oxygen production device, comprising:

[0007] An adsorption dryer, which has a desiccant inside and is configured to use the desiccant to adsorb and dry the introduced compressed air, and has an air discharge port and a desorbed gas inlet formed thereon;

[0008] A PSA oxygen concentrator, wherein an adsorbent is provided inside the PSA oxygen concentrator, and a gas inlet, an oxygen outlet, and a nitrogen outlet are formed on the PSA oxygen concentrator, wherein the gas inlet is connected to the air outlet, and the PSA oxygen concentrator is configured to separate nitrogen and oxygen from the air introduced therein by using the adsorbent;

[0009] an oxygen storage tank, which is in communication with the oxygen discharge port and is configured to store oxygen discharged from the oxygen discharge port of the PSA oxygen concentrator;

[0010] A nitrogen storage tank is formed with an inlet end and an outlet end, the inlet end is connected to the nitrogen discharge port through a nitrogen collection pipe, and the outlet end is connected to the desorption gas inlet. The nitrogen storage tank is configured to store nitrogen discharged from the nitrogen discharge port and provide nitrogen to the adsorption dryer for desorption of the desiccant.

[0011] In some embodiments of the present application, the oxygen production device further comprises:

[0012] An air storage tank is connected to the air discharge port of the adsorption dryer and the gas inlet port of the PSA oxygen concentrator through pipelines, and is configured to store air discharged from the air discharge port and provide air to the PSA oxygen concentrator.

[0013] In some embodiments of the present application, the PSA oxygen concentrator comprises:

[0014] The first adsorption tank;

[0015] The second adsorption tank;

[0016] The bottom gas inlet end of the first adsorption tank and the bottom gas inlet end of the second adsorption tank are connected to the gas inlet port through a first gas pipeline and a second gas pipeline respectively; the bottom gas outlet end of the first adsorption tank and the bottom gas outlet end of the second adsorption tank are connected to the nitrogen discharge port through a third gas pipeline and a fourth gas pipeline respectively;

[0017] The first adsorption tank and the second adsorption tank are configured to alternately adsorb and desorb nitrogen.

[0018] In some embodiments of the present application, the PSA oxygen concentrator further comprises:

[0019] a first air inlet program-controlled valve, which is arranged on the first air transmission pipeline;

[0020] a second air inlet program-controlled valve, which is provided on the second air delivery pipeline;

[0021] a first desorption program-controlled valve, which is arranged on the third gas transmission pipeline;

[0022] The second desorption program-controlled valve is arranged on the fourth gas transmission pipeline.

[0023] In some embodiments of the present application, the top exhaust end of the first adsorption tank and the top exhaust end of the second adsorption tank are connected to the oxygen exhaust port through a fifth gas pipeline and a sixth gas pipeline respectively;

[0024] The middle parts of the fifth gas pipeline and the sixth gas pipeline are connected through the seventh gas pipeline.

[0025] In some embodiments of the present application, the PSA oxygen concentrator further comprises:

[0026] a first oxygen-producing program-controlled valve, which is provided on the fifth gas transmission pipeline;

[0027] a second oxygen-producing program-controlled valve, which is provided on the sixth gas transmission pipeline;

[0028] A backwash program-controlled valve is provided on the seventh gas transmission pipeline.

[0029] In some embodiments of the present application, the bottom air inlet end of the first adsorption tank and the bottom air inlet end of the second adsorption tank are connected through an eighth air pipeline; the top exhaust end of the first adsorption tank and the top exhaust end of the second adsorption tank are connected through a ninth air pipeline; the PSA oxygen concentrator further includes:

[0030] a lower pressure-equalizing program-controlled valve, which is provided on the eighth gas transmission pipeline;

[0031] The upper pressure-equalizing program-controlled valve is arranged on the ninth gas transmission pipeline.

[0032] In some embodiments of the present application, the oxygen production device further comprises:

[0033] a nitrogen exhaust pipe, one end of which is connected to the nitrogen exhaust port and the other end of which is connected to the atmosphere;

[0034] A nitrogen exhaust program-controlled valve is arranged on the nitrogen exhaust pipeline.

[0035] In some embodiments of the present application, the oxygen production device further comprises:

[0036] A check valve is provided on the nitrogen collecting pipe.

[0037] In some embodiments of the present application, the adsorbent includes zeolite molecular sieve.

[0038] Compared with the prior art, the advantages and positive effects of the present invention are as follows: the oxygen production device includes an adsorption dryer, a PSA oxygen generator, an oxygen storage tank and a nitrogen storage tank; the adsorption dryer absorbs and dries the introduced compressed air through a desiccant; an adsorbent is provided inside the PSA oxygen generator; the PSA oxygen generator separates nitrogen and oxygen from the introduced air through the adsorbent to form nitrogen and oxygen; the oxygen enters the oxygen storage tank for storage after being discharged; the nitrogen enters the nitrogen storage tank for storage after being discharged; the outlet end of the nitrogen storage tank is connected to the desorption gas inlet of the adsorption dryer; the desiccant is desorbed and regenerated by providing nitrogen to the adsorption dryer, thereby realizing the recycling of nitrogen, reducing the consumption of compressed air by the entire oxygen production device, and being beneficial to reducing energy consumption; at the same time, being beneficial to reducing the specification requirements for the front-stage air source system and the cost of operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0040] Figure 1 This is a structural diagram of an embodiment of an oxygen production device provided by the present invention;

[0041] Figure 2 This is a structural schematic diagram of another embodiment of the oxygen production device provided by the utility model;

[0042] Figure 3 This is a structural schematic diagram of another embodiment of the oxygen production device provided by the utility model;

[0043] Figure 4 This is a structural schematic diagram of another embodiment of the oxygen production device provided by the utility model;

[0044] Figure 5 This is a structural schematic diagram of another embodiment of the oxygen production device provided by the utility model.

[0045] Description of reference numerals:

[0046] 1. Adsorption dryer; 11. Air discharge port; 12. Desorption gas inlet;

[0047] 2. PSA oxygen concentrator; 21. Gas inlet; 211. Exhaust pipe; 2111. Main program-controlled valve; 22. Oxygen exhaust port; 23. Nitrogen exhaust port; 231. Nitrogen exhaust pipe; 2311. Nitrogen exhaust program-controlled valve; 2312. Muffler; 24. First adsorption tank; 241. First gas pipeline; 2411. First inlet program-controlled valve; 242. Third gas pipeline; 2421. First desorption program-controlled valve; 243. Fifth gas pipeline; 24 31. First oxygen-generating program-controlled valve; 25. Second adsorption tank; 251. Second gas pipeline; 2511. Second air inlet program-controlled valve; 252. Fourth gas pipeline; 2521. Second desorption program-controlled valve; 253. Sixth gas pipeline; 2531. Second oxygen-generating program-controlled valve; 26. Seventh gas pipeline; 261. Backwash program-controlled valve; 27. Eighth gas pipeline; 271. Lower equalizing pressure program-controlled valve; 28. Ninth gas pipeline; 281. Upper equalizing pressure program-controlled valve.

[0048] 3. Oxygen storage tank;

[0049] 4. Nitrogen storage tank; 41. Inlet port; 42. Outlet port; 43. Nitrogen collection pipe; 431. Check valve;

[0050] 5. Air storage tank. DETAILED DESCRIPTION

[0051] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] It should be noted that in the description of this utility model, terms such as "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0054] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0055] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0056] Ozone has very strong oxidizing properties. It not only quickly kills harmful pathogens such as bacteria, fungi, mycoplasmas, and even viruses, but also produces no secondary pollution during the disinfection and sterilization process. It is widely used in industrial wastewater treatment, tap water disinfection, food processing, and other fields. At room temperature and pressure, ozone molecules are unstable and easily decompose, with the decomposition product being oxygen, so on-site production and use are required. Currently, there are various methods for producing ozone, including electrochemical methods, ultraviolet light irradiation, and dielectric barrier discharge methods. These methods generally require oxygen as the raw material for production, and the ozone industry has very high requirements for the purity and dew point of the raw oxygen.

[0057] Combine Figures 1 to 5 As shown, an embodiment of the present disclosure provides an oxygen production device, which includes a front-stage gas source system (not shown in the figure), an adsorption dryer 1, a PSA oxygen generator 2, an oxygen storage tank 3 and a nitrogen storage tank 4.

[0058] Among them, the front-stage air source system mainly includes air compressor, refrigeration dryer and filter.

[0059] There are many types of air compressors, which can be categorized by their operating principle into positive displacement, reciprocating, and centrifugal compressors. Positive displacement compressors work by compressing the volume of gas, increasing the density of gas molecules per unit volume and thereby raising the pressure of the compressed air. Centrifugal compressors work by increasing the speed of gas molecules, converting their kinetic energy into pressure energy, thereby increasing the pressure of the compressed air. Reciprocating compressors (also known as piston compressors) work by directly compressing the gas and discharging it when it reaches a certain pressure.

[0060] The refrigeration dryer uses refrigeration technology to reduce the temperature of compressed air, causing the moisture in the air to condense into ice, and then evaporates the ice through heating or decompression, thereby ensuring the dryness and purity of the compressed air.

[0061] The main function of the filter is to remove impurities such as moisture, grease, gel and dust from the compressed air to provide clean air for subsequent use.

[0062] The compressed air is processed by the refrigeration dryer and the filter before entering the adsorption dryer 1 .

[0063] The adsorption dryer 1 has a desiccant inside. The adsorption dryer 1 is configured to use the desiccant to perform adsorption drying on the introduced compressed air. The adsorption dryer 1 is formed with an air discharge port 11 and a desorbed gas inlet 12 .

[0064] Among them, the desiccant mainly includes alumina and sodium X-type molecular sieve.

[0065] There are two common types of adsorption dryers 1, one is a heatless regeneration adsorption dryer, and the other is a micro-heat regeneration adsorption dryer.

[0066] A heatless regenerative adsorption dryer is a dehumidification device that uses pressure swing adsorption (PSA) to dry compressed air through self-heating (no external heat source required). It utilizes a dual-tower structure: one tower absorbs moisture from the compressed air at a constant pressure, while the other tower regenerates the desiccant in the adsorption tower using a small amount of dry air at slightly above atmospheric pressure. After a certain period of time, the two towers switch, ensuring a continuous supply of dry compressed air. The actual operation of a tower is divided into three stages: adsorption, regeneration, and pressurization.

[0067] A micro-heat regenerative adsorption dryer is a dehumidification device based on the principle of pressure swing adsorption, using heating and regeneration to adsorb and dry compressed air. It utilizes a dual-tower structure: one tower absorbs moisture from the compressed air at a constant pressure, while the other tower uses a small amount of dry air at a pressure slightly above atmospheric pressure, which is heated before entering the regeneration tower to regenerate the desiccant. After a certain period of time, the two towers switch, ensuring a continuous supply of dry compressed air. The actual operation of a tower is divided into three stages: adsorption, regeneration, and pressurization.

[0068] Combine Figure 1 As shown, an adsorbent is provided inside the PSA oxygen concentrator 2. A gas inlet 21, an oxygen outlet 22, and a nitrogen outlet 23 are formed on the PSA oxygen concentrator 2. The gas inlet 21 is connected to the air outlet 11. The PSA oxygen concentrator 2 is configured to use the adsorbent to separate nitrogen and oxygen from the incoming air to form nitrogen and oxygen.

[0069] The nitrogen and oxygen formed are not pure nitrogen and oxygen because the adsorbent primarily adsorbs nitrogen, water vapor, and a small amount of oxygen. The oxygen produced by the adsorbent during nitrogen-oxygen separation is primarily discharged through oxygen outlet 22 ; the nitrogen adsorbed by the adsorbent is then desorbed and discharged through nitrogen outlet 23 .

[0070] Dew point temperature is a critical parameter for PSA oxygen concentrator 2, representing the water content in the gas. A lower dew point indicates less water in the gas. Air entering PSA oxygen concentrator 2, after being processed by the freeze dryer, adsorption dryer 1, and filter, must meet the required inlet dew point for PSA oxygen concentrator 2. This is crucial for ensuring the proper operation of PSA oxygen concentrator 2 and oxygen quality.

[0071] The oxygen storage tank 3 is connected to the oxygen discharge port 22 and is configured to store oxygen discharged from the oxygen discharge port 22 of the PSA oxygen generator 2. The oxygen storage tank 3 is used to provide oxygen to the gas consumption point.

[0072] The nitrogen storage tank 4 is formed with an inlet end 41 and an outlet end 42. The inlet end 41 is connected to the nitrogen discharge port 23 through a nitrogen collection pipe 43, and the outlet end 42 is connected to the desorption gas inlet 12. It is configured to store nitrogen discharged from the nitrogen discharge port 23 and desorb the desiccant of the nitrogen provided by the adsorption dryer 1.

[0073] The embodiment of the present disclosure uses nitrogen discharged from the PSA oxygen generator 2 to replace conventional dry air and is used as the regeneration gas of the adsorption dryer 1 to reduce the consumption of compressed air.

[0074] Specifically, the oxygen production device includes an adsorption dryer 1, a PSA oxygen generator 2, an oxygen storage tank 3 and a nitrogen storage tank 4. The adsorption dryer 1 adsorbs and dries the introduced compressed air through a desiccant. The PSA oxygen generator 2 is provided with an adsorbent. The PSA oxygen generator 2 separates nitrogen and oxygen from the introduced air through the adsorbent to form nitrogen and oxygen. After the oxygen is discharged, it enters the oxygen storage tank 3 for storage. After the nitrogen is discharged, it enters the nitrogen storage tank 4 for storage. The outlet end 42 of the nitrogen storage tank 4 is connected to the desorption gas inlet 12 of the adsorption dryer 1. By providing nitrogen to the adsorption dryer 1 to desorb and regenerate the desiccant, the nitrogen is recycled, thereby reducing the consumption of compressed air by the entire oxygen production device, which is beneficial to reducing energy consumption. At the same time, it is beneficial to reduce the specification requirements for the front-stage air source system and the cost of operation and maintenance.

[0075] In some embodiments of the present application, the oxygen production device further includes an air storage tank 5 .

[0076] The air storage tank 5 is connected to the air discharge port 11 of the adsorption dryer 1 and the gas inlet 21 of the PSA oxygen generator 2 through pipelines, and is configured to store air discharged from the air discharge port 11 and provide air to the PSA oxygen generator 2 .

[0077] Specifically, by providing the air storage tank 5 , dry air can be stored to ensure a continuous supply of air required by the PSA oxygen generator 2 .

[0078] In some embodiments of the present application, the PSA oxygen generator 2 includes a first adsorption tank 24 and a second adsorption tank 25 .

[0079] The bottom air inlet end of the first adsorption tank 24 and the bottom air inlet end of the second adsorption tank 25 are respectively connected to the gas inlet port 21 through the first gas pipeline 241 and the second gas pipeline 251. The gas inlet port 21 is connected to the air storage tank 5 through the exhaust pipeline 211. The exhaust pipeline 211 is provided with a main program-controlled valve 2111. The bottom air outlet end of the first adsorption tank 24 and the bottom air outlet end of the second adsorption tank 25 are respectively connected to the nitrogen exhaust port 23 through the third gas pipeline 242 and the fourth gas pipeline 252.

[0080] The first adsorption tank 24 and the second adsorption tank 25 are configured to alternately adsorb and desorb nitrogen.

[0081] Specifically, by providing the first adsorption tank 24 and the second adsorption tank 25 , both of which are filled with adsorbent, the first adsorption tank 24 and the second adsorption tank 25 can alternately adsorb and desorb nitrogen, thereby achieving continuous separation of nitrogen and oxygen.

[0082] In some embodiments of the present application, the PSA oxygen concentrator 2 further includes a first air intake program-controlled valve 2411 , a second air intake program-controlled valve 2511 , a first desorption program-controlled valve 2421 , and a second desorption program-controlled valve 2521 .

[0083] The first air inlet program-controlled valve 2411 is provided on the first air pipeline 241 to facilitate the on-off control of the first air pipeline 241 .

[0084] The second air inlet program-controlled valve 2511 is provided on the second air pipeline 251 to facilitate the on-off control of the second air pipeline 251 .

[0085] The first desorption program-controlled valve 2421 is provided on the third gas pipeline 242 to facilitate the on-off control of the third gas pipeline 242 .

[0086] The second desorption program-controlled valve 2521 is provided on the fourth gas pipeline 252 to facilitate the on-off control of the fourth gas pipeline 252 .

[0087] In some embodiments of the present application, the top exhaust end of the first adsorption tank 24 and the top exhaust end of the second adsorption tank 25 are connected to the oxygen exhaust port 22 through the fifth gas pipeline 243 and the sixth gas pipeline 253 respectively.

[0088] The middle parts of the fifth gas pipeline 243 and the sixth gas pipeline 253 are connected through the seventh gas pipeline 26 .

[0089] Specifically, by setting up the fifth gas pipeline 243 and the sixth gas pipeline 253, it is convenient to connect the top exhaust end of the first adsorption tank 24 and the top exhaust end of the second adsorption tank 25 to the oxygen exhaust port 22 through different gas pipelines, respectively, to achieve oxygen discharge from the first adsorption tank 24 and the second adsorption tank 25; by connecting the middle part of the fifth gas pipeline 243 and the sixth gas pipeline 253 through the seventh gas pipeline 26, it is convenient to achieve backwashing of the first adsorption tank 24 and the second adsorption tank 25.

[0090] In some embodiments of the present application, the PSA oxygen generator 2 further includes a first oxygen-generating program-controlled valve 2431 , a second oxygen-generating program-controlled valve 2531 , and a backwash program-controlled valve 261 .

[0091] The first oxygen-producing programmable valve 2431 is provided on the fifth gas pipeline 243 to facilitate the on-off control of the fifth gas pipeline 243 .

[0092] The second oxygen-producing programmable valve 2531 is provided on the sixth gas pipeline 253 to facilitate the on-off control of the sixth gas pipeline 253 .

[0093] The backwash program-controlled valve 261 is provided on the seventh gas pipeline 26 to facilitate the on-off control of the seventh gas pipeline 26 .

[0094] In some embodiments of the present application, the bottom air inlet end of the first adsorption tank 24 and the bottom air inlet end of the second adsorption tank 25 are connected through an eighth air pipeline 27; the top exhaust end of the first adsorption tank 24 and the top exhaust end of the second adsorption tank 25 are connected through a ninth air pipeline 28; the PSA oxygen concentrator 2 further includes:

[0095] The lower pressure-equalizing programmable valve 271 is provided on the eighth gas pipeline 27 to facilitate the on-off control of the eighth gas pipeline 27 .

[0096] The upper pressure-equalizing programmable valve 281 is provided on the ninth gas pipeline 28 to facilitate the on-off control of the ninth gas pipeline 28 .

[0097] In some embodiments of the present application, the oxygen production device further includes a nitrogen exhaust pipeline 231 and a nitrogen exhaust program-controlled valve 2311 .

[0098] One end of the nitrogen exhaust pipe 231 is connected to the nitrogen exhaust port 23, and the other end thereof is connected to the atmosphere, so as to discharge the excess nitrogen to the outdoor high altitude.

[0099] The nitrogen exhaust program-controlled valve 2311 is provided on the nitrogen exhaust pipeline 231 to facilitate the on-off control of the nitrogen exhaust pipeline 231 .

[0100] In some embodiments of the present application, the oxygen production device also includes an electronic control module, and the main programmable valve 2111, the nitrogen exhaust programmable valve 2311, the first air intake programmable valve 2411, the first desorption programmable valve 2421, the first oxygen production programmable valve 2431, the second air intake programmable valve 2511, the second desorption programmable valve 2521, the second oxygen production programmable valve 2531, the backwash programmable valve 261, the lower pressure equalizing programmable valve 271 and the upper pressure equalizing programmable valve 281 are all electrically connected to the electronic control module, so that the electronic control module can control the above-mentioned programmable valves.

[0101] At the same time, pressure transmitters are provided on both sides of the upper pressure-equalizing program-controlled valve 281 on the exhaust pipeline 211 and the ninth gas transmission pipeline 28 for detecting the pressure of the pipeline.

[0102] In some embodiments of the present application, the oxygen generating device further includes a muffler 2312 .

[0103] The silencer 2312 is provided on the nitrogen exhaust pipe 231 to reduce noise and protect people's health.

[0104] In some embodiments of the present application, the oxygen generating device further includes a check valve 431 .

[0105] Check valve 431 is installed on nitrogen collection pipe 43 to facilitate automatic nitrogen recovery through program control. A portion of the nitrogen discharged by PSA oxygen generator 2 is recovered through nitrogen collection pipe 43 and reused as regeneration gas for adsorption dryer 1. This helps reduce the oxygen generator's consumption of compressed air, lowering energy consumption and achieving energy conservation and emission reduction goals.

[0106] In some embodiments of the present application, the adsorbent includes zeolite molecular sieve.

[0107] Zeolite molecular sieve uses the principle of pressure swing adsorption to adsorb nitrogen under pressure and desorb nitrogen under normal pressure. Under a certain pressure, the difference in the adsorption amount of oxygen and nitrogen in the air on the surface of the zeolite molecular sieve is utilized (that is, the diffusion adsorption of nitrogen by zeolite molecular sieve is much greater than that of oxygen). Over a certain period of time, nitrogen, carbon dioxide, etc. in the air are enriched in the adsorption phase, while oxygen is enriched in the gas phase, thereby achieving nitrogen and oxygen separation and obtaining high-purity oxygen.

[0108] When the zeolite molecular sieve is saturated with adsorption, it needs to be desorbed and regenerated. The desorbed gas is mainly nitrogen.

[0109] The working process of the oxygen production device in this application is as follows:

[0110] First, qualified compressed air is obtained through the air compressor, freezer dryer and filter of the front-stage air source system; the compressed air enters the adsorption dryer 1, and is alternately adsorbed and regenerated in the two towers of the adsorption dryer 1 to achieve continuous drying of the compressed air, wherein the dried compressed air is discharged through the air discharge port 11 and enters the air storage tank 5 for storage; the regenerated gas of the adsorption dryer 1 enters from the desorption gas inlet 12.

[0111] Then the air storage tank 5 provides air for the PSA oxygen generator 2. The first adsorption tank 24 and the second adsorption tank 25 of the PSA oxygen generator 2 alternately perform nitrogen adsorption and nitrogen desorption to continuously provide oxygen. For example, the nitrogen adsorption and nitrogen desorption process is as follows: Figure 2 As shown in the figure, the arrows indicate the direction of air flow. Open the main program-controlled valve 2111 and the first air inlet program-controlled valve 2411. Air passes through the exhaust pipe 211 and the first air supply pipe 241 in sequence and enters the first adsorption tank 24 from the bottom air inlet end. The pressure in the first adsorption tank 24 increases, and the nitrogen molecules in the air are adsorbed by the adsorbent in the first adsorption tank 24. The unadsorbed oxygen passes through the adsorbent and is discharged from the top exhaust end of the first adsorption tank 24 and enters the fifth air supply pipe 243. Open the first oxygen-generating program-controlled valve 2 431, oxygen passes through the oxygen discharge port 22 and finally enters the oxygen storage tank 3 for storage; during the adsorption process of the first adsorption tank 24, desorption is carried out in the second adsorption tank 25. At this time, the second air inlet program-controlled valve 2511, the second oxygen production program-controlled valve 2531, and the first desorption program-controlled valve 2421 are in a closed state, and the second desorption program-controlled valve 2521 is in an open state. Nitrogen is desorbed in the second adsorption tank 25, and the nitrogen generated by desorption enters the nitrogen storage tank 4 through the nitrogen collection pipe for storage, or is discharged into the atmosphere through the nitrogen exhaust pipe 231.

[0112] After the adsorption process of the first adsorption tank 24 is completed, the upper pressure equalization program-controlled valve 281 and the lower pressure equalization program-controlled valve 271 are opened, and the pressure at the upper and lower ends of the first adsorption tank 24 and the second adsorption tank 25 are balanced. Figure 3 As shown, the arrow in the figure indicates the direction of airflow. The compressed air passes through the second air pipeline 251 and enters the second adsorption tank 25 for nitrogen adsorption, and is desorbed in the first adsorption tank 24. The process is similar to the above process and will not be repeated here.

[0113] After the first adsorption tank 24 desorbs nitrogen, in order to completely discharge the nitrogen in the first adsorption tank 24, the first adsorption tank 24 needs to be backwashed. Backwashing is performed using the oxygen in the oxygen storage tank 3. Figure 4 As shown, Figure 4The middle arrow indicates the direction of backwashing. The specific process is as follows: open the second oxygen production program-controlled valve 2531, the backwash program-controlled valve 261, the first desorption program-controlled valve 2421 and the nitrogen exhaust program-controlled valve 2311, so that the oxygen in the oxygen storage tank 3 flows through the first adsorption tank 24 in sequence, and the nitrogen in the first adsorption tank 24 is driven out and discharged into the atmosphere through the third gas transmission pipeline 242 and the nitrogen exhaust pipeline 231.

[0114] Combine Figure 5 As shown, the backwash process of the second adsorption tank 25 is similar to the above process and will not be repeated here.

[0115] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0116] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. An oxygen production device, characterized in that: include: An adsorption dryer, which has a desiccant inside and is configured to use the desiccant to adsorb and dry the introduced compressed air, and has an air discharge port and a desorbed gas inlet formed thereon; A PSA oxygen concentrator, wherein an adsorbent is provided inside the PSA oxygen concentrator, and a gas inlet, an oxygen outlet, and a nitrogen outlet are formed on the PSA oxygen concentrator, wherein the gas inlet is connected to the air outlet, and the PSA oxygen concentrator is configured to separate nitrogen and oxygen from the air introduced therein by using the adsorbent; an oxygen storage tank, which is in communication with the oxygen discharge port and is configured to store oxygen discharged from the oxygen discharge port of the PSA oxygen concentrator; A nitrogen storage tank is formed with an inlet end and an outlet end, the inlet end is connected to the nitrogen discharge port through a nitrogen collection pipe, and the outlet end is connected to the desorption gas inlet. The nitrogen storage tank is configured to store nitrogen discharged from the nitrogen discharge port and provide nitrogen to the adsorption dryer for desorption of the desiccant.

2. The oxygen production device according to claim 1, characterized in that The oxygen production device also includes: An air storage tank is connected to the air discharge port of the adsorption dryer and the gas inlet port of the PSA oxygen concentrator through pipelines, and is configured to store air discharged from the air discharge port and provide air to the PSA oxygen concentrator.

3. The oxygen production device according to claim 1, characterized in that The PSA oxygen concentrator comprises: First adsorption tank; The second adsorption tank; The bottom gas inlet end of the first adsorption tank and the bottom gas inlet end of the second adsorption tank are connected to the gas inlet port through a first gas pipeline and a second gas pipeline respectively; the bottom gas outlet end of the first adsorption tank and the bottom gas outlet end of the second adsorption tank are connected to the nitrogen discharge port through a third gas pipeline and a fourth gas pipeline respectively; The first adsorption tank and the second adsorption tank are configured to alternately adsorb and desorb nitrogen.

4. The oxygen production device according to claim 3, characterized in that The PSA oxygen concentrator further comprises: a first air inlet program-controlled valve, which is arranged on the first air transmission pipeline; a second air inlet program-controlled valve, which is provided on the second air delivery pipeline; a first desorption program-controlled valve, which is arranged on the third gas transmission pipeline; The second desorption program-controlled valve is arranged on the fourth gas transmission pipeline.

5. The oxygen production device according to claim 3, characterized in that The top exhaust end of the first adsorption tank and the top exhaust end of the second adsorption tank are connected to the oxygen exhaust port through a fifth gas pipeline and a sixth gas pipeline respectively; The middle parts of the fifth gas pipeline and the sixth gas pipeline are connected through the seventh gas pipeline.

6. The oxygen production device according to claim 5, characterized in that The PSA oxygen concentrator further comprises: a first oxygen-producing program-controlled valve, which is provided on the fifth gas transmission pipeline; a second oxygen-producing program-controlled valve, which is provided on the sixth gas transmission pipeline; A backwash program-controlled valve is provided on the seventh gas transmission pipeline.

7. The oxygen production device according to claim 5, characterized in that The bottom air inlet end of the first adsorption tank and the bottom air inlet end of the second adsorption tank are connected through an eighth air pipeline; the top exhaust end of the first adsorption tank and the top exhaust end of the second adsorption tank are connected through a ninth air pipeline; the PSA oxygen concentrator further includes: a lower pressure-equalizing program-controlled valve, which is provided on the eighth gas transmission pipeline; The upper pressure-equalizing program-controlled valve is arranged on the ninth gas transmission pipeline.

8. The oxygen production device according to claim 1, characterized in that The oxygen production device also includes: a nitrogen exhaust pipe, one end of which is connected to the nitrogen exhaust port and the other end of which is connected to the atmosphere; A nitrogen exhaust program-controlled valve is arranged on the nitrogen exhaust pipeline.

9. The oxygen production device according to claim 1, characterized in that The oxygen production device also includes: A check valve is provided on the nitrogen collecting pipe.

10. The oxygen production device according to claim 1, characterized in that The adsorbent includes zeolite molecular sieve.

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