An integrated oxygen production device and oxygen production method based on temperature swing adsorption

Abstract

The present invention relates to an integrated oxygen production device and method based on temperature swing adsorption; it belongs to the field of oxygen production technology, and its steps are as follows: (1) adsorption; (2) hot air desorption; (3) hot oxygen desorption; (4) oxygen cooling; the process parameters are as follows: the temperature of the hot air used for desorption in the hot air desorption process is 100-150°C; the temperature of the hot oxygen used for further cleaning and desorption in the hot oxygen desorption process is 100-150°C; the hot air used in the hot air desorption step is passed through a circulating fan to achieve a closed-loop circulation between the air heater and the adsorption tower. The integrated oxygen production device and method based on temperature swing adsorption of the present invention can significantly reduce the oxygen production energy consumption and operating noise because it adopts an integrated oxygen production adsorbent with lower bed pressure resistance, and the heat source can come from waste heat recovery.

Description

Technical Field

[0001] The invention relates to an integrated oxygen production device and an oxygen production method based on temperature swing adsorption, and belongs to the technical field of oxygen production. Background Art

[0002] Oxygen is one of the essential gases for modern human survival and production. Industrial oxygen is widely used in metallurgy, mechanical processing and other fields.

[0003] At present, the main methods for producing industrial oxygen include cryogenic separation of liquid air, membrane separation, pressure swing adsorption (PSA), etc. The cryogenic separation of liquid air mainly utilizes the different boiling points of oxygen and nitrogen in the air to separate and purify them to obtain higher purity oxygen; the principle of membrane separation is to produce oxygen by utilizing the difference in the rate at which nitrogen and oxygen molecules pass through the membrane; and the pressure swing adsorption method utilizes the physical adsorption of oxygen-producing molecular sieves to achieve the separation of nitrogen and oxygen.

[0004] The low-temperature separation of liquid air can produce oxygen with a purity of more than 99%, but this method has high investment costs, high energy consumption, and occupies a large area. Therefore, its use scenarios are limited and it is not conducive to large-scale promotion. The membrane separation method uses low energy consumption and simple processes, but the purity of the produced oxygen is lower than that of the liquid air separation method, only about 40%. The pressure swing adsorption method can obtain oxygen with a purity of more than 90%, but when in use, the machine is noisy, the densely packed bed has a large pressure resistance, and the energy consumption is relatively high.

[0005] With the development of the industry, people have increasingly stringent requirements on energy consumption in all links of industrial production, especially in the fields of industrial oxygen use such as metallurgy, mechanical processing, and engineering construction. The above three commonly used industrial oxygen production methods, due to their own principle limitations, lead to excessive energy consumption.

[0006] Therefore, providing an integrated oxygen production device and oxygen production method based on temperature swing adsorption with reduced oxygen production energy consumption, reduced operating noise, more flexible applicability and lower cost has become a technical problem that urgently needs to be solved in this technical field. Summary of the invention

[0007] In view of the problems existing in the existing technology, one of the objectives of the present invention is to provide an integrated oxygen production device based on temperature swing adsorption, which has reduced oxygen production energy consumption, reduced operating noise, is more flexible in application and has lower cost.

[0008] The above object of the present invention is achieved through the following technical solutions:

[0009] An integrated oxygen production device based on temperature swing adsorption, characterized in that it includes: a first adsorption tower, a second adsorption tower, a third adsorption tower, a fourth adsorption tower, a first hot air desorption air intake valve, a second hot air desorption air intake valve, a third hot air desorption air intake valve, a fourth hot air desorption air intake valve, a first hot oxygen desorption air intake valve, a second hot oxygen desorption air intake valve, a third hot oxygen desorption air intake valve, a fourth hot oxygen desorption air intake valve, a first product gas exhaust valve, a second product gas exhaust valve, a third product gas exhaust valve, a fourth product gas exhaust valve, a product gas exhaust valve, a first raw gas intake valve, a second raw gas intake valve, a third raw gas intake valve, a fourth raw gas intake valve, a first oxygen cooling exhaust valve, a second oxygen cooling exhaust valve, a third oxygen cooling exhaust valve cooling exhaust valve, the fourth oxygen cooling exhaust valve, the first hot air desorption exhaust valve, the second hot air desorption exhaust valve, the third hot air desorption exhaust valve, the fourth hot air desorption exhaust valve, the first hot oxygen desorption exhaust valve, the second hot oxygen desorption exhaust valve, the third hot oxygen desorption exhaust valve, the fourth hot oxygen desorption exhaust valve, an air heater, an oxygen heater, a circulating fan, a flow regulating valve and an air blower; the air blower is respectively connected to the first raw gas inlet valve at the bottom of the first adsorption tower, the second raw gas inlet valve at the bottom of the second adsorption tower, the third raw gas inlet valve at the bottom of the third adsorption tower and the fourth raw gas inlet valve at the bottom of the fourth adsorption tower through the raw gas path; one end of the air heater is ... hot air pipeline and The first hot air desorption air inlet valve, the second hot air desorption air inlet valve, the third hot air desorption air inlet valve, and the fourth hot air desorption air inlet valve are respectively connected to the top of the first adsorption tower, the second adsorption tower, the third adsorption tower, and the fourth adsorption tower; the other end of the air heater is connected to one end of the circulating fan; the other end of the circulating fan is connected to the bottom of the first adsorption tower, the second adsorption tower, the third adsorption tower, and the fourth adsorption tower through a hot air pipeline and the first hot air desorption air exhaust valve, the second hot air desorption air exhaust valve, the third hot air desorption air exhaust valve, and the fourth hot air desorption air exhaust valve; one end of the oxygen heater is connected to the bottom of the first adsorption tower, the second adsorption tower, the third adsorption tower, and the fourth adsorption tower through a hot oxygen pipeline and the first hot oxygen desorption air inlet valve, the second hot oxygen desorption air exhaust valve, the third hot oxygen desorption air exhaust valve, and the fourth hot air desorption air exhaust valve. The air intake valve and the fourth hot oxygen desorption air intake valve are respectively connected to the top of the first adsorption tower, the second adsorption tower, the third adsorption tower and the fourth adsorption tower; the other end of the oxygen heater is respectively connected to the bottom of the first adsorption tower, the second adsorption tower, the third adsorption tower and the fourth adsorption tower through the hot oxygen pipeline and the first oxygen cooling exhaust valve, the second oxygen cooling exhaust valve, the third oxygen cooling exhaust valve and the fourth oxygen cooling exhaust valve; the first product gas exhaust valve, the second product gas exhaust valve, the third product gas exhaust valve and the fourth product gas exhaust valve at the top of the first adsorption tower, the second adsorption tower, the third adsorption tower and the fourth adsorption tower are connected to one end of the product gas exhaust valve through the cooling oxygen pipeline, and the other end of the product gas exhaust valve is connected to the flow regulating valve;The first hot oxygen desorption gas exhaust valve, the second hot oxygen desorption gas exhaust valve, the third hot oxygen desorption gas exhaust valve, and the fourth hot oxygen desorption gas exhaust valve at the bottom of the first adsorption tower, the second adsorption tower, the third adsorption tower, and the fourth adsorption tower are connected to each other through the product gas pipeline and connected to the product gas pipeline. ;

[0010] Preferably, the first adsorption tower, the second adsorption tower, the third adsorption tower and the fourth adsorption tower are filled with honeycomb oxygen adsorbent which is integrally extruded or supported by a glass fiber substrate.

[0011] Preferably, the honeycomb oxygen-generating adsorbent includes but is not limited to FAU and LTA molecular sieves and oxygen-generating adsorbents obtained by ion modification of the above molecular sieves.

[0012] Preferably, the honeycomb body is densely and orderly packed in the tower, and the upstream and downstream channels are aligned.

[0013] Preferably, the outer walls of the first adsorption tower, the second adsorption tower, the third adsorption tower, the fourth adsorption tower, and the outer walls of the raw gas pipeline, the hot air pipeline, and the hot oxygen pipeline are provided with insulation pipes.

[0014] Another object of the present invention is to provide an integrated oxygen production method based on temperature swing adsorption, which can use factory waste heat regeneration to reduce the oxygen production cost during the oxygen production process and reduce equipment noise.

[0015] The above object of the present invention is achieved through the following technical solutions:

[0016] An integrated oxygen production method based on temperature swing adsorption, the steps are as follows:

[0017] (1) Adsorption;

[0018] (2) hot air desorption;

[0019] (3) Thermal oxygen desorption;

[0020] (4) Oxygen cooling.

[0021] Preferably, the process parameters are as follows: the temperature of the hot air used for desorption in the hot air desorption process is between 100 and 150°C; the temperature of the hot oxygen used for further cleaning and desorption in the hot oxygen desorption process is between 100 and 150°C; the hot air used in the hot air desorption step passes through a circulating fan to achieve a closed-loop circulation between the air heater and the adsorption tower.

[0022] Preferably, the specific steps of the integrated oxygen production method based on temperature swing adsorption are as follows:

[0023] Air, i.e. raw gas, undergoes necessary pretreatment and is pressurized by a blower before being sent into four adsorption towers through the first raw gas inlet valve, the second raw gas inlet valve, the third raw gas inlet valve and the fourth raw gas inlet valve. After most of the nitrogen and a small amount of oxygen are adsorbed, most of the oxygen gathers at the top of the adsorption tower; the first product gas exhaust valve, the second product gas exhaust valve, the third product gas exhaust valve and the fourth product gas exhaust valve are opened, and the oxygen-rich product gas flows from the top of the tower into the cooling oxygen pipeline. At this time, the product gas exhaust valve and the flow regulating valve are opened, and part of the product gas is sent to the user. At the same time, the first product gas exhaust valve, the second product gas exhaust valve, the third product gas exhaust valve and the fourth product gas exhaust valve in the oxygen cooling process are opened to allow the normal temperature oxygen-rich product gas to enter the adsorption tower to cool the high temperature bed layer; the higher temperature oxygen-rich product gas after heat exchange is discharged into the hot oxygen pipeline through the first oxygen cooling exhaust valve, the second oxygen cooling exhaust valve, the third oxygen cooling exhaust valve and the fourth oxygen cooling exhaust valve; the higher temperature oxygen-rich gas in the hot oxygen pipeline is heated to the specified temperature by the oxygen heater and then passes through the first hot oxygen exhaust valve at the top of the adsorption tower. The desorption air inlet valve, the second hot oxygen desorption air inlet valve, the third hot oxygen desorption air inlet valve, and the fourth hot oxygen desorption air inlet valve enter the adsorption tower undergoing the hot oxygen desorption process to further clean and desorb the bed layer; after completing the heat exchange, the high-temperature rich oxygen is discharged from the first hot oxygen desorption air exhaust valve, the second hot oxygen desorption air exhaust valve, the third hot oxygen desorption air exhaust valve, and the fourth hot oxygen desorption air exhaust valve at the bottom of the adsorption tower into the product gas pipeline and sent to the user side for use; the hot air is pressurized by the circulating fan, and after being heated to the specified temperature by the air heater, it is passed through the hot air The first hot air desorption air inlet valve, the second hot air desorption air inlet valve, the third hot air desorption air inlet valve and the fourth hot air desorption air inlet valve on the pipeline enter the adsorption tower to be heated and desorbed by air. In the adsorption tower, the hot air completes heat exchange with the bed to heat up the bed. The hot air after the heat exchange will be discharged back into the hot air pipeline from the first hot air desorption air exhaust valve, the second hot air desorption air exhaust valve, the third hot air desorption air exhaust valve and the fourth hot air desorption air exhaust valve at the bottom of the adsorption tower, and will be recycled after being pressurized by the circulating fan and heated by the oxygen heater.

[0024] Preferably, the working process of the first adsorption tower is as follows:

[0025] (1) Adsorption

[0026] After the blower is pressurized, the clean air that has been filtered and dust-removed by the filter and dried and dehydrated is sent to the raw gas pipeline. The first raw gas inlet valve is controlled to open, so that the raw gas enters the first adsorption tower, nitrogen is adsorbed in the first adsorption tower, oxygen is enriched, the first product gas exhaust valve is opened, and the oxygen-enriched gas enters the cooling oxygen pipeline, the second product gas exhaust valve and the second oxygen cooling exhaust valve of the second adsorption tower are opened, and the oxygen-enriched product gas enters the cooling bed layer of the second adsorption tower, the product gas exhaust valve is opened, and the flow regulating valve controls the outflow of the product gas. After the first adsorption tower is saturated with adsorption, the first raw gas inlet valve, the first product gas exhaust valve, the second product gas exhaust valve, and the second oxygen cooling exhaust valve are closed, and the first adsorption tower enters the next process;

[0027] (2) Hot air desorption

[0028] The hot air flowing out from the bottom of the fourth adsorption tower that performs the previous hot air desorption process enters the hot air pipeline, the fourth hot air desorption inlet valve and the fourth hot air desorption exhaust valve of the fourth adsorption tower are closed, the first hot air desorption inlet valve and the first hot air desorption exhaust valve of the first adsorption tower are opened, and the hot air in the hot air pipeline is sent to the air heater after passing through the circulating fan, and after the temperature is raised to the set value, it enters the heating bed layer of the first adsorption tower through the first hot air desorption inlet valve of the first adsorption tower for desorption, and the exhaust gas flows out from the first hot air desorption exhaust valve and is sent to the air heater for heating and circulation again by the circulating fan until the hot air desorption of the bed layer of the first adsorption tower is completed, then the first hot air desorption inlet valve and the first hot air desorption exhaust valve are closed, and the first adsorption tower enters the next process;

[0029] (3) Thermal oxygen desorption

[0030] At the bottom of the fourth adsorption tower which is undergoing the oxygen cooling process, the high-temperature rich oxygen flowing out through the fourth oxygen cooling exhaust valve enters the hot oxygen pipeline, and after being further heated by the oxygen heater, is sent to the first adsorption tower through the opened first hot oxygen desorption inlet valve, so that the integral bed in the first adsorption tower is further cleaned and desorbed. The first hot oxygen desorption gas exhaust valve is opened, and the rich oxygen flowing through the bed is sent to the user side for use through the product gas pipeline. Subsequently, the first hot oxygen desorption gas inlet valve and the first hot oxygen desorption gas exhaust valve are closed, and the first adsorption tower enters the next process;

[0031] (4) Oxygen cooling

[0032] The fourth raw gas inlet valve of the fourth adsorption tower is opened, nitrogen in the fourth adsorption tower is adsorbed, oxygen is enriched at the top of the tower, the fourth product gas exhaust valve and the first product gas exhaust valve are opened, and the oxygen-enriched product gas flowing out from the top of the fourth adsorption tower is sent to the first adsorption tower, and the low-temperature oxygen-enriched product gas is used to purge and cool the high-temperature bed layer in the bed to restore its adsorption capacity. The higher temperature oxygen-enriched oxygen after heat exchange with the bed layer is discharged into the hot oxygen pipeline through the first oxygen cooling exhaust valve at the bottom of the first adsorption tower. After the bed layer of the first adsorption tower is cooled, the fourth product gas exhaust valve, the first product gas exhaust valve and the fourth raw gas inlet valve are closed, and the first adsorption tower enters the next adsorption cycle.

[0033] Preferably, the cycle timing table of the first adsorption tower, the second adsorption tower, the third adsorption tower and the fourth adsorption tower is shown in the following table.

[0034] The first adsorption tower Adsorption Hot air desorption Thermal oxygen desorption Oxygen cooling The second adsorption tower Oxygen cooling Adsorption Hot air desorption Thermal oxygen desorption The third adsorption tower Thermal oxygen desorption Oxygen cooling Adsorption Hot air desorption The fourth adsorption tower Hot air desorption Thermal oxygen desorption Oxygen cooling Adsorption

[0035] Preferably, in the hot air desorption process, the air heater heats the air to 100-150°C.

[0036] Preferably, in the hot oxygen desorption process, the outlet gas temperature of the oxygen heater is 100-150°C.

[0037] Preferably, in the oxygen cooling process, the oxygen cooling gas volume can be controlled by adjusting the outflow gas volume on the mass flow controller, and the ratio of cooling gas to the total product gas volume is between 0.1 and 1.

[0038] Preferably, in the oxygen cooling process, when all the product gas is used as cooling gas, all the oxygen-rich gas will flow out from the bottom of the adsorption tower where the oxygen heating process is performed and be supplied to users.

[0039] Preferably, in the hot air desorption process, the hot air used for bed desorption is circulated in a closed manner between the adsorption tower and the air heater by a circulating fan, which significantly reduces heat consumption.

[0040] Preferably, in the hot oxygen desorption process, part of the heat source of the oxygen heater comes from the heat exchanged when the oxygen bed is cooled in step (4), thereby saving some heat.

[0041] Preferably, a series of solenoid valves are controlled to open and close to achieve switching between processes.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] (1) The present invention creatively adopts an integral adsorption bed with a honeycomb loaded with oxygen-generating adsorbent and adopts a temperature-swinging adsorption method, which reduces the bed pressure resistance while reducing the power consumption of oxygen production and operating noise;

[0044] (2) The present invention achieves waste heat recovery and utilization in the hot air desorption process and the hot oxygen desorption process, further reducing the energy consumption of oxygen production;

[0045] (3) The present invention utilizes a certain proportion of product gas to perform bed cooling and oxygen cooling processes. After completing the two steps, the product gas can still be supplied to users, thereby improving the desorption effect and maximizing the use of product gas.

[0046] The present invention is further described below through the accompanying drawings and specific implementation modes, but it is not intended to limit the protection scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic structural diagram of an integrated oxygen production device based on temperature swing adsorption according to the present invention.

[0048] Names of main parts in the figure:

[0049] 1A-First hot air desorption intake valve 1B-Second hot air desorption intake valve

[0050] 1C-3rd hot air desorption intake valve 1D-4th hot air desorption intake valve

[0051] 2A-First hot oxygen desorption intake valve 2B-Second hot oxygen desorption intake valve

[0052] 2C-3rd thermal oxygen desorption intake valve 2D-4th thermal oxygen desorption intake valve

[0053] 3A-First product gas exhaust valve 3B-Second product gas exhaust valve

[0054] 3C- Third product gas exhaust valve 3D- Fourth product gas exhaust valve

[0055] 4A-First adsorption tower 4B-Second adsorption tower

[0056] 4C-the third adsorption tower 4D-the fourth adsorption tower

[0057] 5A-First raw gas inlet valve 5B-Second raw gas inlet valve

[0058] 5C- Third raw gas intake valve 5D- Fourth raw gas intake valve

[0059] 6A-First oxygen cooling exhaust valve 6B-Second oxygen cooling exhaust valve

[0060] 6C-3rd oxygen cooling exhaust valve 6D-4th oxygen cooling exhaust valve

[0061] 7A-First hot air desorption and exhaust valve 7B-Second hot air desorption and exhaust valve

[0062] 7C-3rd hot air desorption and exhaust valve 7D-4th hot air desorption and exhaust valve

[0063] 8A-First hot oxygen desorption gas exhaust valve 8B-Second hot oxygen desorption gas exhaust valve

[0064] 8C-3rd hot oxygen desorption and exhaust valve 8D-4th hot oxygen desorption and exhaust valve

[0065] F-Product gas 1 exhaust valve 9-Air heater

[0066] 10-Oxygen heater 11-Circulation fan

[0067] 12-Flow regulating valve 13-Blower DETAILED DESCRIPTION

[0068] Unless otherwise specified, the components used in the present invention are all commercially available components in the technical field, and the connection methods thereof are the conventional connection methods in the technical field; the materials used are the conventional materials in the technical field.

[0069] The technical scheme of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but it will be understood by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. If specific conditions are not specified in the embodiments, they are carried out according to normal conditions or conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0070] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0071] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0073] Example 1

[0074] like Figure 1 As shown, it is a structural schematic diagram of an integrated oxygen production device based on temperature swing adsorption of the present invention; wherein 1A is a first hot air desorption air intake valve, 1B is a second hot air desorption air intake valve, 1C is a third hot air desorption air intake valve, 1D is a fourth hot air desorption air intake valve, 2A is a first hot oxygen desorption air intake valve, 2B is a second hot oxygen desorption air intake valve, 2C is a third hot oxygen desorption air intake valve, 2D is a fourth hot oxygen desorption air intake valve, 3A is a first product gas exhaust valve, 3B is a second product gas exhaust valve, 3C is a third product gas exhaust valve, 3D is a fourth product gas exhaust valve, 4A is a first adsorption tower, 4B is a second adsorption tower, 4C is a third adsorption tower, 4D is a fourth adsorption tower, 5A is a first raw gas intake valve, 5B is a second raw gas intake valve, valve, 5C is the third raw gas inlet valve, 5D is the fourth raw gas inlet valve, 6A is the first oxygen cooling exhaust valve, 6B is the second oxygen cooling exhaust valve, 6C is the third oxygen cooling exhaust valve, 6D is the fourth oxygen cooling exhaust valve, 7A is the first hot air desorption exhaust valve, 7B is the second hot air desorption exhaust valve, 7C is the third hot air desorption exhaust valve, 7D is the fourth hot air desorption exhaust valve, 8A is the first hot oxygen desorption exhaust valve, 8B is the second hot oxygen desorption exhaust valve, 8C is the third hot oxygen desorption exhaust valve, 8D is the fourth hot oxygen desorption exhaust valve, F is the product gas 1 exhaust valve, 9 is an air heater, 10 is an oxygen heater, 11 is a circulating fan, 12 is a flow regulating valve, and 13 is a blower;

[0075] The integrated oxygen production device based on temperature swing adsorption of the present invention includes a first adsorption tower 4A, a second adsorption tower 4B, a third adsorption tower 4C, a fourth adsorption tower 4D, a first hot air desorption intake valve 1A, a second hot air desorption intake valve 1B, a third hot air desorption intake valve 1C, a fourth hot air desorption intake valve 1D, a first hot oxygen desorption intake valve 2A, a second hot oxygen desorption intake valve 2B, a third hot oxygen desorption intake valve 2C, a fourth hot oxygen desorption intake valve 2D, a first product gas exhaust valve 3A, a second product gas exhaust valve 3B, a third product gas exhaust valve 3C, a fourth product gas exhaust valve 3D, a product gas 1 exhaust valve F, a first raw gas intake valve 5A, a second raw gas intake valve 5B, the third raw gas intake valve 5C, the fourth raw gas intake valve 5D, the first oxygen cooling exhaust valve 6A, the second oxygen cooling exhaust valve 6B, the third oxygen cooling exhaust valve 6C, the fourth oxygen cooling exhaust valve 6D, the first hot air desorption exhaust valve 7A, the second hot air desorption exhaust valve 7B, the third hot air desorption exhaust valve 7C, the fourth hot air desorption exhaust valve 7D, the first hot oxygen desorption exhaust valve 8A, the second hot oxygen desorption exhaust valve 8B, the third hot oxygen desorption exhaust valve 8C, the fourth hot oxygen desorption exhaust valve 8D, the air heater 9, the oxygen heater 10, the circulation fan 11, the flow regulating valve 12 and the blower 13; the blower 13 passes through the raw gas The material gas path is respectively connected to the first raw material gas inlet valve 5A at the bottom of the first adsorption tower 4A, the second raw material gas inlet valve 5B at the bottom of the second adsorption tower 4B, the third raw material gas inlet valve 5C at the bottom of the third adsorption tower 4C, and the fourth raw material gas inlet valve 5D at the bottom of the fourth adsorption tower 4D; one end of the air heater 9 is connected to the top of the first adsorption tower 4A, the second adsorption tower 4B, the third adsorption tower 4C, and the fourth adsorption tower 4D through the hot air pipeline and the first hot air desorption inlet valve 1A, the second hot air desorption inlet valve 1B, the third hot air desorption inlet valve 1C, and the fourth hot air desorption inlet valve 1D; the other end of the air heater 9 is connected to one end of the circulating fan 11 The other end of the circulating fan 11 is connected to the bottom of the first adsorption tower 4A, the second adsorption tower 4B, the third adsorption tower 4C, and the fourth adsorption tower 4D through a hot air pipeline and a first hot air desorption exhaust valve 7A, a second hot air desorption exhaust valve 7B, a third hot air desorption exhaust valve 7C, and a fourth hot air desorption exhaust valve 7D, respectively; one end of the oxygen heater 10 is connected to the top of the first adsorption tower 4A, the second adsorption tower 4B, the third adsorption tower 4C, and the fourth adsorption tower 4D through a hot oxygen pipeline and a first hot oxygen desorption intake valve 2A, a second hot oxygen desorption intake valve 2B, a third hot oxygen desorption intake valve 2C, and a fourth hot oxygen desorption intake valve 2D, respectively;The other end of the oxygen heater 10 is connected to the bottom of the first adsorption tower 4A, the second adsorption tower 4B, the third adsorption tower 4C, and the fourth adsorption tower 4D through the hot oxygen pipeline and the first oxygen cooling exhaust valve 6A, the second oxygen cooling exhaust valve 6B, the third oxygen cooling exhaust valve 6C, and the fourth oxygen cooling exhaust valve 6D; the first product gas exhaust valve 3A, the second product gas exhaust valve 3B, the third product gas exhaust valve 3C at the top of the first adsorption tower 4A, the second adsorption tower 4B, the third adsorption tower 4C, and the fourth adsorption tower 4D are connected. C, the fourth product gas exhaust valve 3D is connected to one end of the product gas 1 exhaust valve F through the cooling oxygen pipeline, and the other end of the product gas 1 exhaust valve F is connected to the flow regulating valve 12; the first hot oxygen desorption gas exhaust valve 8A, the second hot oxygen desorption gas exhaust valve 8B, the third hot oxygen desorption gas exhaust valve 8C, and the fourth hot oxygen desorption gas exhaust valve 8D at the bottom of the first adsorption tower 4A, the second adsorption tower 4B, the third adsorption tower 4C, and the fourth adsorption tower 4D are connected to each other through the product gas pipeline, and the product is delivered through the product gas pipeline;

[0076] The first adsorption tower 4A, the second adsorption tower 4B, the third adsorption tower 4C, and the fourth adsorption tower 4D are filled with honeycomb oxygen adsorbents that are integrally extruded or supported by glass fiber substrates;

[0077] Honeycomb oxygen adsorbents include but are not limited to FAU and LTA molecular sieves and oxygen adsorbents obtained by ion modification of the above molecular sieves; the honeycombs are densely and orderly packed in the tower;

[0078] The honeycomb oxygen adsorbent is packed tightly and orderly in the adsorption tower, so that the upstream and downstream channels of the module are aligned, reducing the increase in bed flow resistance caused by airway blockage;

[0079] The outer walls of the first adsorption tower 4A, the second adsorption tower 4B, the third adsorption tower 4C, and the fourth adsorption tower 4D, the outer walls of the raw gas pipeline, the hot air pipeline, the hot oxygen pipeline, and other places where hot gas may flow through are all laid with insulation pipes, thereby reducing heat loss and energy consumption.

[0080] The integrated oxygen production device based on temperature swing adsorption of the present invention enriches oxygen from the air through the temperature swing adsorption method, and at the same time, utilizes the characteristic that the adsorption amount of the oxygen production adsorbent decreases when the temperature rises to desorb nitrogen from the adsorbent.

[0081] The integrated oxygen production device based on temperature swing adsorption of the present invention may have four adsorption towers or more.

[0082] The integrated oxygen production device based on temperature swing adsorption of the present invention extrude the oxygen production adsorbent with nitrogen and oxygen separation performance into a honeycomb shape, or load it on a honeycomb-shaped glass fiber to make an integrated oxygen production adsorbent, load the integrated honeycomb oxygen production adsorbent into an adsorption tower, and utilize methods such as honeycomb pore alignment to ensure smooth flow.

[0083] The integrated oxygen production method based on temperature swing adsorption of the present invention comprises four processes: adsorption, hot air desorption, hot oxygen desorption, and oxygen cooling; the process parameters of the temperature swing adsorption oxygen production are as follows: the temperature of the hot air used for desorption in the hot air desorption process is 100-150°C; the temperature of the hot oxygen used for further cleaning and desorption in the hot oxygen desorption process is 100-150°C; the hot air used in the hot air desorption step in the oxygen production process based on temperature swing adsorption is closed-loop circulated between the air heater and the adsorption tower through a circulating fan, which significantly reduces heat consumption;

[0084] The operating steps of the integrated oxygen production device based on temperature swing adsorption of the present invention are as follows:

[0085] Air, i.e., raw gas, undergoes necessary pretreatment and is pressurized by the blower 13 before being fed into the first adsorption tower 4A, the second adsorption tower 4B, the third adsorption tower 4C, and the fourth adsorption tower 4D (hereinafter referred to as the adsorption towers) through the first raw gas inlet valve 5A, the second raw gas inlet valve 5B, the third raw gas inlet valve 5C, and the fourth raw gas inlet valve 5D, respectively. After most of the nitrogen and a small amount of oxygen are adsorbed, most of the oxygen gathers at the top of the adsorption tower; the first product gas exhaust valve 3A, the second product gas exhaust valve 3B, the third product gas exhaust valve 3C, and the fourth product gas exhaust valve 3D are opened, and the oxygen-enriched product gas flows from the top of the tower into the cooling oxygen pipeline. At this time, the product gas 1 exhaust valve F and the flow regulating valve 12 are opened, and part of the product gas is fed into the cooling oxygen pipeline. To the user side for use; at the same time, the first product gas exhaust valve 3A on the top of the first adsorption tower 1A, which is undergoing the oxygen cooling process, the second product gas exhaust valve 3B on the top of the second adsorption tower 4B, the third product gas exhaust valve 3C on the top of the third adsorption tower 4C, and the fourth product gas exhaust valve 3D on the top of the fourth adsorption tower 4D are opened to allow the normal temperature oxygen-rich product gas to enter the adsorption tower to cool the high-temperature bed layer; the higher temperature oxygen-rich product gas after heat exchange is discharged into the hot oxygen pipeline through the first oxygen cooling exhaust valve 6A, the second oxygen cooling exhaust valve 6B, the third oxygen cooling exhaust valve 6C, and the fourth oxygen cooling exhaust valve 6D at the bottom of the first adsorption tower 4A, the second adsorption tower 4B, the third adsorption tower 4C, and the fourth adsorption tower 4D; The higher temperature oxygen-rich gas in the hot oxygen pipeline is heated to a specified temperature by the oxygen heater 10, and then enters the adsorption tower undergoing the hot oxygen desorption process through the first hot oxygen desorption air inlet valve 2A, the second hot oxygen desorption air inlet valve 2B, the third hot oxygen desorption air inlet valve 2C, and the fourth hot oxygen desorption air inlet valve 2D at the top of the adsorption tower to further clean and desorb the bed layer; after completing the heat exchange, the high-temperature oxygen-rich gas is discharged from the first hot oxygen desorption air exhaust valve 8A, the second hot oxygen desorption air exhaust valve 8B, the third hot oxygen desorption air exhaust valve 8C, and the fourth hot oxygen desorption air exhaust valve 8D at the bottom of the first adsorption tower 4A, the second adsorption tower 4B, the third adsorption tower 4C, and the fourth adsorption tower 4D into the product gas pipeline and sent to the user side for use Use; the hot air is pressurized by the circulating fan 11, heated to the specified temperature by the air heater 9, and then enters the adsorption tower to be heated and desorbed by air through the first hot air desorption air intake valve 1A, the second hot air desorption air intake valve 1B, the third hot air desorption air intake valve 1C, and the fourth hot air desorption air intake valve 1D on the hot air pipeline. In the adsorption tower, the hot air completes heat exchange with the bed to heat the bed. After the heat exchange, the hot air will be discharged back into the hot air pipeline from the first hot air desorption air exhaust valve 7A, the second hot air desorption air exhaust valve 7B, the third hot air desorption air exhaust valve 7C, and the fourth hot air desorption air exhaust valve 7D at the bottom of the adsorption tower, and will be pressurized by the circulating fan 11 and heated by the oxygen heater 9 again before recycling.

[0086] The following is an introduction to the specific working cycle using adsorption tower 4A as an example:

[0087] (1) Adsorption

[0088] After the blower 13 is pressurized, the clean air that has been filtered and dust-removed by the filter and dried and dehydrated is sent to the raw gas pipeline, the first raw gas inlet valve 5A is controlled to open, so that the raw gas enters the first adsorption tower 4A, nitrogen is adsorbed in the first adsorption tower 4A, oxygen is enriched, the first product gas exhaust valve 3A is opened, and the oxygen-enriched gas enters the cooling oxygen pipeline, the second product gas exhaust valve 3B and the second oxygen cooling exhaust valve 6B of the second adsorption tower 4B are opened, and the oxygen-enriched product gas enters the cooling bed layer of the second adsorption tower 4B, the product gas 1 exhaust valve F is opened, and the flow regulating valve 12 controls the outflow of the product gas 1. After the first adsorption tower 4A is saturated with adsorption, the first raw gas inlet valve 5A, the first product gas exhaust valve 3A, the second product gas exhaust valve 3B, and the second oxygen cooling exhaust valve 6B are closed, and the first adsorption tower 4A enters the next process;

[0089] (2) Hot air desorption

[0090] The hot air flowing out from the bottom of the fourth adsorption tower 4D executing the previous hot air desorption process enters the hot air pipeline, the fourth hot air desorption inlet valve 1D and the fourth hot air desorption exhaust valve 7D of the fourth adsorption tower 4D are closed, the first hot air desorption inlet valve 1A and the first hot air desorption exhaust valve 7A of the first adsorption tower 4A are opened, and the hot air in the hot air pipeline is sent to the air heater 9 after passing through the circulating fan 11, and after the temperature is raised to the set value, it enters the heating bed layer of the first adsorption tower 4A through the first hot air desorption inlet valve 1A of the first adsorption tower 4A for desorption, and the exhaust gas flows out from the first hot air desorption exhaust valve 7A, and is sent to the air heater 9 by the circulating fan 11 for heating and circulation until the hot air desorption of the bed layer of the first adsorption tower 4A is completed, then the first hot air desorption inlet valve 1A and the first hot air desorption exhaust valve 7A are closed, and the first adsorption tower 4A enters the next process;

[0091] (3) Thermal oxygen desorption

[0092] At the bottom of the fourth adsorption tower 4D which is undergoing the oxygen cooling process, the high-temperature rich oxygen flowing out through the fourth oxygen cooling exhaust valve 6D enters the hot oxygen pipeline, and after being further heated by the oxygen heater 10, is sent to the first adsorption tower 4A through the opened first hot oxygen desorption inlet valve 2A, so that the integral bed in the first adsorption tower 4A is further cleaned and desorbed. The first hot oxygen desorption gas exhaust valve 8A is opened, and the rich oxygen flowing through the bed is sent to the user side for use (product gas 2) through the product gas pipeline. Subsequently, the first hot oxygen desorption gas inlet valve 2A and the first hot oxygen desorption gas exhaust valve 8A are closed, and the first adsorption tower 4A enters the next process;

[0093] (4) Oxygen cooling

[0094] The fourth raw gas inlet valve 5D of the fourth adsorption tower 4D is opened, nitrogen is adsorbed in the fourth adsorption tower 4D, oxygen is enriched at the top of the tower, the fourth product gas exhaust valve 3D and the first product gas exhaust valve 3A are opened, and the oxygen-enriched product gas flowing out from the top of the fourth adsorption tower 4D is sent to the first adsorption tower 4A, and the low-temperature oxygen-enriched product gas purges and cools the high-temperature bed layer in the bed to restore its adsorption capacity, and the higher-temperature oxygen-enriched oxygen after heat exchange with the bed layer is discharged into the hot oxygen pipeline through the first oxygen cooling exhaust valve 6A at the bottom of the first adsorption tower 4A. After the bed layer of the first adsorption tower 4A is cooled, the fourth product gas exhaust valve 3D, the first product gas exhaust valve 3A, and the fourth raw gas inlet valve 5D are closed, and the first adsorption tower 4A enters the next adsorption cycle;

[0095] Repeat steps (1) to (4) to complete a cycle.

[0096] Table 1 Cycle timing table

[0097] Adsorption tower 4A Adsorption Hot air desorption Thermal oxygen desorption Oxygen cooling Adsorption tower 4B Oxygen cooling Adsorption Hot air desorption Thermal oxygen desorption Adsorption tower 4C Thermal oxygen desorption Oxygen cooling Adsorption Hot air desorption Adsorption Tower 4D Hot air desorption Thermal oxygen desorption Oxygen cooling Adsorption

[0098] The air heater 9 controls the air temperature to be heated at 100-150°C;

[0099] The desorption effect is related to the heating temperature of the oxygen heater 10. The higher the temperature, the better the desorption effect. However, if the temperature is too high, energy consumption will increase. Therefore, the gas temperature at the outlet of the oxygen heater 10 is limited to 100-150°C.

[0100] The cooling gas volume of the adsorption tower entering the oxygen cooling process accounts for 10%-100% of the total product gas volume; when all the product gas is used as cooling gas, all the oxygen-rich gas will flow out from the bottom of the adsorption tower performing the hot oxygen desorption process through the product gas pipeline and be supplied to users.

[0101] The present invention provides an integrated oxygen production device and oxygen production method based on temperature swing adsorption, wherein the integrated oxygen production device is filled with an integrated honeycomb oxygen production adsorbent made by integral extrusion molding or glass fiber or other substrate coating load; the oxygen production method is a multi-tower type, and utilizes temperature swing adsorption to realize the oxygen production process. The oxygen production method proposed by the present invention significantly reduces the energy consumption of oxygen production and reduces the operating noise.

[0102] The integrated oxygen production device and method based on temperature swing adsorption of the present invention comprises a blower, four adsorption towers filled with integrated honeycomb oxygen production adsorbents, an air heater, an oxygen heater, a circulating fan, a solenoid valve, a flow regulating valve and necessary pipeline connections. One path of air is sent to the adsorption tower to adsorb nitrogen and enrich oxygen; the enriched oxygen is first sent to the adsorption tower to be cooled to cool the bed under the protection of rich oxygen; the oxygen-enriched product gas flowing out of the adsorption tower to be cooled is heated by heat exchange at this time, and then heated to a higher temperature by the oxygen heater and sent to the adsorption tower of the hot oxygen desorption process for heating while reducing the nitrogen partial pressure to make the bed more fully desorbed, and then sent to the user side for use; the other path of air is heated by the air heater and sent to the hot air heating adsorption tower to heat the bed, and the low-temperature exhaust gas is sent to the air heater again through the circulating fan to heat and circulate for use. The integrated oxygen production device and oxygen production method based on temperature swing adsorption of the present invention can significantly reduce oxygen production energy consumption and operating noise because they use an integrated oxygen production adsorbent with lower bed pressure resistance and the heat source can come from waste heat recovery.

[0103] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention. These improvements should also be regarded as the protection scope of the present invention.

Claims

1. An integrated oxygen production device based on temperature swing adsorption, characterized in that: include, The first adsorption tower, the second adsorption tower, the third adsorption tower, the fourth adsorption tower, the first hot air desorption air inlet valve, the second hot air desorption air inlet valve, the third hot air desorption air inlet valve, the fourth hot air desorption air inlet valve, the first hot oxygen desorption air inlet valve, the second hot oxygen desorption air inlet valve, the third hot oxygen desorption air inlet valve, the fourth hot oxygen desorption air inlet valve, the first product gas exhaust valve, the second product gas exhaust valve, the third product gas exhaust valve, the fourth product gas exhaust valve, the product gas exhaust valve, the first raw gas intake valve, the second raw gas intake valve, the third raw gas intake valve, the fourth raw gas intake valve, the first oxygen cooling exhaust valve, the second oxygen cooling exhaust valve, the third oxygen cooling exhaust valve, the fourth oxygen cooling exhaust valve, the first hot air The air supply fan is connected to the first raw material gas inlet valve at the bottom of the first adsorption tower, the second raw material gas inlet valve at the bottom of the second adsorption tower, the third raw material gas inlet valve at the bottom of the third adsorption tower and the fourth raw material gas inlet valve at the bottom of the fourth adsorption tower through the raw material gas path; one end of the air heater is connected to the first raw material gas inlet valve, the second raw material gas inlet valve at the bottom of the second adsorption tower, the third raw material gas inlet valve at the bottom of the third adsorption tower and the fourth raw material gas inlet valve at the bottom of the fourth adsorption tower through the hot air pipeline; one end of the air heater is connected to the first raw material gas inlet valve, the second raw material gas inlet valve at the bottom of the second adsorption tower, the third raw material gas inlet valve at the bottom of the third adsorption tower and the fourth raw material gas inlet valve at the bottom of the fourth adsorption tower through the hot air pipeline The hot air desorption air inlet valve, the third hot air desorption air inlet valve, and the fourth hot air desorption air inlet valve are respectively connected to the tops of the first adsorption tower, the second adsorption tower, the third adsorption tower, and the fourth adsorption tower; the other end of the air heater is connected to one end of the circulating fan; the other end of the circulating fan is connected to the bottoms of the first adsorption tower, the second adsorption tower, the third adsorption tower, and the fourth adsorption tower through a hot air pipeline and the first hot air desorption air exhaust valve, the second hot air desorption air exhaust valve, the third hot air desorption air exhaust valve, and the fourth hot air desorption air exhaust valve; one end of the oxygen heater is connected to the bottom of the first adsorption tower, the second adsorption tower, the third adsorption tower, and the fourth adsorption tower through a hot oxygen pipeline and the first hot oxygen desorption air inlet valve, the second hot oxygen desorption air inlet valve, the third hot oxygen desorption air exhaust valve, and the fourth The hot oxygen desorption inlet valve is respectively connected to the top of the first adsorption tower, the second adsorption tower, the third adsorption tower and the fourth adsorption tower; the other end of the oxygen heater is respectively connected to the bottom of the first adsorption tower, the second adsorption tower, the third adsorption tower and the fourth adsorption tower through the hot oxygen pipeline and the first oxygen cooling exhaust valve, the second oxygen cooling exhaust valve, the third oxygen cooling exhaust valve and the fourth oxygen cooling exhaust valve; the first product gas exhaust valve, the second product gas exhaust valve, the third product gas exhaust valve and the fourth product gas exhaust valve at the top of the first adsorption tower, the second adsorption tower, the third adsorption tower and the fourth adsorption tower are connected to one end of the product gas exhaust valve through the cooling oxygen pipeline, and the other end of the product gas exhaust valve is connected to the flow regulating valve;The first hot oxygen desorption gas exhaust valve, the second hot oxygen desorption gas exhaust valve, the third hot oxygen desorption gas exhaust valve, and the fourth hot oxygen desorption gas exhaust valve at the bottom of the first adsorption tower, the second adsorption tower, the third adsorption tower, and the fourth adsorption tower are connected to each other through the product gas pipeline and connected to the product gas pipeline. ; 2. The integrated oxygen production device based on temperature swing adsorption according to claim 1 is characterized in that: The first adsorption tower, the second adsorption tower, the third adsorption tower and the fourth adsorption tower are filled with honeycomb oxygen adsorbent which is integrally extruded or supported by a glass fiber substrate.

3. The integrated oxygen production device based on temperature swing adsorption according to claim 2 is characterized in that: The honeycomb oxygen-generating adsorbent includes FAU and LTA molecular sieves and oxygen-generating adsorbents obtained by ion modification of the above molecular sieves.

4. The integrated oxygen production device based on temperature swing adsorption according to claim 3 is characterized in that: The honeycomb body is densely and orderly packed in the tower, and the upstream and downstream channels are aligned.

5. The integrated oxygen production device based on temperature swing adsorption according to claim 4 is characterized in that: The outer walls of the first adsorption tower, the second adsorption tower, the third adsorption tower, and the fourth adsorption tower, and the outer walls of the raw gas pipeline, the hot air pipeline, and the hot oxygen pipeline are provided with insulation pipes.

6. The oxygen production method of the integrated oxygen production device based on temperature swing adsorption according to any one of claims 1 to 5, wherein the steps are as follows: (1) Adsorption; (2) hot air desorption; (3) Thermal oxygen desorption; (4) Oxygen cooling; The process parameters are as follows: the temperature of the hot air used for desorption in the hot air desorption process is between 100 and 150° C.; the temperature of the hot oxygen used for further cleaning and desorption in the hot oxygen desorption process is between 100 and 150° C.; the hot air used in the hot air desorption step is circulated in a closed loop between the air heater and the adsorption tower through a circulating fan.

7. The oxygen production method of the integrated oxygen production device based on temperature swing adsorption according to any one of claims 1 to 5, wherein the working process of the first adsorption tower is as follows: (1) Adsorption After the blower is pressurized, the clean air that has been filtered and dust-removed by the filter and dried and dehydrated is sent to the raw gas pipeline. The first raw gas inlet valve is controlled to open, so that the raw gas enters the first adsorption tower, nitrogen is adsorbed in the first adsorption tower, oxygen is enriched, the first product gas exhaust valve is opened, and the oxygen-enriched gas enters the cooling oxygen pipeline, the second product gas exhaust valve and the second oxygen cooling exhaust valve of the second adsorption tower are opened, and the oxygen-enriched product gas enters the cooling bed layer of the second adsorption tower, the product gas exhaust valve is opened, and the flow regulating valve controls the outflow of the product gas. After the first adsorption tower is saturated with adsorption, the first raw gas inlet valve, the first product gas exhaust valve, the second product gas exhaust valve, and the second oxygen cooling exhaust valve are closed, and the first adsorption tower enters the next process; (2) Hot air desorption The hot air flowing out from the bottom of the fourth adsorption tower that performs the previous hot air desorption process enters the hot air pipeline, the fourth hot air desorption inlet valve and the fourth hot air desorption exhaust valve of the fourth adsorption tower are closed, the first hot air desorption inlet valve and the first hot air desorption exhaust valve of the first adsorption tower are opened, and the hot air in the hot air pipeline is sent to the air heater after passing through the circulating fan, and after the temperature is raised to the set value, it enters the heating bed layer of the first adsorption tower through the first hot air desorption inlet valve of the first adsorption tower for desorption, and the exhaust gas flows out from the first hot air desorption exhaust valve and is sent to the air heater for heating and circulation again by the circulating fan until the hot air desorption of the bed layer of the first adsorption tower is completed, then the first hot air desorption inlet valve and the first hot air desorption exhaust valve are closed, and the first adsorption tower enters the next process; (3) Thermal oxygen desorption At the bottom of the fourth adsorption tower which is undergoing the oxygen cooling process, the high-temperature rich oxygen flowing out through the fourth oxygen cooling exhaust valve enters the hot oxygen pipeline, and after being further heated by the oxygen heater, is sent to the first adsorption tower through the opened first hot oxygen desorption inlet valve, so that the integral bed in the first adsorption tower is further cleaned and desorbed. The first hot oxygen desorption gas exhaust valve is opened, and the rich oxygen flowing through the bed is sent to the user side for use through the product gas pipeline. Subsequently, the first hot oxygen desorption gas inlet valve and the first hot oxygen desorption gas exhaust valve are closed, and the first adsorption tower enters the next process; (4) Oxygen cooling The fourth raw gas inlet valve of the fourth adsorption tower is opened, nitrogen in the fourth adsorption tower is adsorbed, oxygen is enriched at the top of the tower, the fourth product gas exhaust valve and the first product gas exhaust valve are opened, and the oxygen-enriched product gas flowing out from the top of the fourth adsorption tower is sent to the first adsorption tower, and the low-temperature oxygen-enriched product gas is used to purge and cool the high-temperature bed layer in the bed to restore its adsorption capacity. The higher temperature oxygen-enriched oxygen after heat exchange with the bed layer is discharged into the hot oxygen pipeline through the first oxygen cooling exhaust valve at the bottom of the first adsorption tower. After the bed layer of the first adsorption tower is cooled, the fourth product gas exhaust valve, the first product gas exhaust valve and the fourth raw gas inlet valve are closed, and the first adsorption tower enters the next adsorption cycle.

8. The oxygen production method of the integrated oxygen production device based on temperature swing adsorption according to claim 7, characterized in that: The cycle timing table of the first adsorption tower, the second adsorption tower, the third adsorption tower, and the fourth adsorption tower is shown in the following table 。 9. The oxygen production method of the integrated oxygen production device based on temperature swing adsorption according to claim 8, characterized in that: In the hot air desorption process, the air heater heats the air to 100-150°C; in the hot oxygen desorption process, the outlet gas temperature of the oxygen heater is 100-150°C; in the oxygen cooling process, the proportion of cooling gas to the total product gas volume is between 0.1 and 1; in the oxygen cooling process, when all product gases are used as cooling gas, all oxygen-rich gas will flow out from the bottom of the adsorption tower where the oxygen heating process is performed and be supplied to users; in the hot air desorption process, the hot air used for bed desorption is closed-circulated between the adsorption tower and the air heater by a circulating fan; in the hot oxygen desorption process, part of the heat source of the oxygen heater comes from the heat exchanged when the oxygen cools the bed.

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