Multistage catalytic purification device for ultra-pure laughing gas

Abstract

The utility model relates to nitrous oxide purification technical field especially super pure nitrous oxide multistage catalytic purification device, including base, still including jar body and purification subassembly, the top of base is provided with purification subassembly, the utility model discloses a nitrous oxide through connecting pipe five into the feed pipe, and simultaneously starts heating device one and heats jar body in two hundred and eighty degrees, thereby making carbon monoxide catalyst catalyzing carbon monoxide and oxygen to occur oxidation reaction, generates carbon dioxide, thereby making the organic matter in nitrous oxide oxidize into water and carbon dioxide, subsequently through connecting pipe three and input nitrous oxide into condensing device, thereby making the moisture in nitrous oxide and impurity condense into water and discharge from connecting pipe one, subsequently nitrous oxide passes through connecting pipe two and enters molecular sieve filter device, thereby filtering carbon dioxide and other impurities in nitrous oxide, subsequently through connecting pipe four and discharge super pure nitrous oxide, thereby being favorable to the removal of organic impurity, thereby being favorable to the removal of carbon monoxide and other reducing gas, thereby being favorable to the purification of nitrous oxide.

Description

Technical Field

[0001] This utility model relates to the field of nitrous oxide purification technology, and in particular to a multi-stage catalytic purification device for ultrapure nitrous oxide. Background Technology

[0002] Nitrous oxide, also known as laughing gas, is a colorless gas with a sweet taste. It has properties such as anesthetic and combustion-supporting effects and is used in medical, food, and industrial fields. However, its abuse can lead to health risks. Nitrous oxide needs to be purified through purification equipment during its production process.

[0003] According to the patent application published on the internet (authorization announcement number: CN218188903U), "This utility model discloses a purifier for nitrous oxide, relating to the field of nitrous oxide processing technology. It includes a reaction chamber, with a cavity on the lower side of the inner wall of the reaction chamber and a rotating groove on the upper side of the inner wall of the cavity. An outlet pipe is fixedly connected to the lower left side of the inner wall of the reaction chamber, and an electromagnetic vacuum valve is installed on the wall of the outlet pipe. An inlet pipe is fixedly connected to the lower right surface of the reaction chamber, and a check valve is installed on the wall of the inlet pipe. A liquid outlet pipe is fixedly connected to the lower left surface of the reaction chamber, and a vacuum valve is installed on the wall of the liquid outlet pipe. A leveling mechanism is installed on the inner wall of the rotating groove. This utility model can efficiently remove impurities from nitrous oxide gas, avoiding the problem of insufficient removal of impurities affecting the normal use function of nitrous oxide gas, and ensuring the quality and effect of nitrous oxide gas use."

[0004] Regarding the above description, the applicant believes the following problems exist: The device is connected to a gas delivery system via an inlet pipe. This gas delivery system is existing equipment and will not be described in detail here. The cavity contains liquid sodium hydroxide, which reacts with impurities in the exhaust gas. Under the action of the electromagnetic vacuum valve, vacuum valve, and check valve, the cavity is kept sealed. The vacuum pump vacuums the inner wall of the cavity to ensure sufficient reaction between the gas and the reaction solution. After the gas is introduced into the cavity, the servo motor drives the second bevel gear via the first bevel gear on the adjusting rod. The second bevel gear stirs the solution via the L-shaped block on the vertical rod, ensuring a thorough reaction between the internal solution and the gas. After the reaction is complete, the electromagnetic vacuum valve opens, and the gas enters the reaction chamber through the outlet pipe. The chamber door closes. The gas undergoes a sealing process, passing through a nickel-based metal mesh plate. Heated by an electric heating plate, the mesh plate dries the gas along with moisture. The gas then passes through activated carbon blocks to adsorb odors and other impurities, followed by final drying with cotton blocks. Finally, it is introduced into other equipment via an outlet pipe pre-connected to the storage device. The equipment allows observation of the solution level and reaction status within the cavity through a glass viewing window. However, the purified nitrous oxide produced by this device has low purity and cannot remove organic impurities and reducing gases such as carbon monoxide. Organic impurities remain in gaseous form, resulting in excessive total organic carbon content in the nitrous oxide, failing to meet high-purity standards. Furthermore, reducing gases such as carbon monoxide react with nitrous oxide during subsequent storage or use, potentially affecting the chemical properties of the nitrous oxide. Utility Model Content

[0005] To overcome the problem that the purified nitrous oxide produced by this device has low purity, cannot remove organic impurities and reducing gases such as carbon monoxide, and the organic impurities remain in gaseous form, failing to meet high purity standards, while reducing gases such as carbon monoxide even affect the chemical properties of nitrous oxide.

[0006] The technical solution of this utility model is as follows: a multi-stage catalytic purification device for ultrapure nitrous oxide, including a base, a tank and a purification component. A condensing device is fixedly connected to the top of the base. A connecting pipe 1 is fixedly connected to the outside of the condensing device. A connecting pipe 3 is fixedly connected to the outside of the condensing device. A connecting pipe 2 is fixedly connected to the outside of the condensing device. A molecular sieve filter is fixedly connected to the outside of the connecting pipe 2. A connecting pipe 4 is fixedly connected to the outside of the molecular sieve filter. A purification component is set on the top of the base. A tank is fixedly connected to the top of the base. A top cover is set on the top of the tank. Bolts are threaded inside the top cover. A connecting pipe 5 is fixedly connected to the top of the top cover. A feed pipe is fixedly connected to the bottom of the top cover. A heating device 1 is set inside the tank. A carbon monoxide catalyst is fixedly connected inside the tank.

[0007] Preferably, the tank body is provided with threaded holes, and bolts are threaded into the inside of the tank body through the threaded holes.

[0008] Preferably, the tank body has a through hole 1, and the connecting pipe 3 is fixedly connected to the inside of the tank body through the through hole 1.

[0009] Preferably, the feed pipe has a through hole 2 that can buffer the incoming gas.

[0010] Preferably, the purification component includes a shell, a connecting pipe six fixedly connected to the outside of the shell, a connecting pipe gas fixedly connected to the outside of the shell, a vacuum pump fixedly connected to the outside of the shell, a heating device two fixedly connected to the outside of the shell, a cotton block fixedly connected to the inside of the shell, an activated carbon plate fixedly connected to the inside of the shell, a nickel-based metal mesh plate fixedly connected to the inside of the shell, a connecting pipe eight fixedly connected to the inside of the shell, an electromagnetic vacuum valve fixedly connected to the outside of the connecting pipe eight, a motor fixedly connected to the inside of the shell, a gear one fixedly connected to the output end of the motor, a gear two externally meshing with the gear one, and a stirring rack fixedly connected to the outside of the gear two.

[0011] Preferably, the outer casing has a through hole three, through which gear one is rotatably connected to the inside of the outer casing.

[0012] Preferably, the outer shell has a through hole four, and the stirring rack is rotatably connected to the inside of the outer shell through the through hole four.

[0013] The beneficial effects of this invention are as follows: Purified nitrous oxide enters the feed pipe through connecting pipe five, and then enters the tank body through the through hole of the feed pipe, thereby uniformly heating the tank body. At the same time, heating device one is activated to heat the tank body to 280 degrees Celsius. The carbon monoxide catalyst is composed of 5% platinum and aluminum oxide, which catalyzes the oxidation reaction between carbon monoxide and oxygen to produce carbon dioxide, thereby oxidizing the organic matter in the nitrous oxide into water and carbon dioxide. Then, the nitrous oxide is fed into the condensation device through connecting pipe three, so that the water and impurities in the nitrous oxide are condensed into water and discharged from connecting pipe one. Then, the nitrous oxide enters the molecular sieve filtration device through connecting pipe two, thereby filtering out impurities such as carbon dioxide in the nitrous oxide. Finally, ultrapure nitrous oxide is discharged through connecting pipe four, which is beneficial for removing organic impurities, removing reducing gases such as carbon monoxide, and purifying nitrous oxide. Attached Figure Description

[0014] Figure 1 The diagram shown is a schematic front view of the overall structure of this utility model.

[0015] Figure 2 The diagram shown is a schematic representation of the overall rear structure of this utility model.

[0016] Figure 3 The diagram shown is a schematic representation of the overall internal structure of this utility model.

[0017] Figure 4 The diagram shown is a schematic representation of the structure of the catalytic component of this utility model.

[0018] Figure 5 The diagram shown is a schematic representation of the purification component of this invention.

[0019] Explanation of reference numerals in the attached drawings: 1. Base; 2. Condensation device; 3. Connecting pipe one; 4. Connecting pipe two; 5. Molecular sieve filter device; 6. Connecting pipe three; 7. Connecting pipe four; 801. Tank body; 802. Connecting pipe five; 803. Top cover; 804. Bolt; 805. Feed pipe; 806. Heating device one; 807. Carbon monoxide catalyst; 901. Outer shell; 902. Connecting pipe six; 903. Connecting pipe gas; 904. Vacuum pump; 905. Heating device two; 906. Nickel-based metal mesh plate; 907. Activated carbon plate; 908. Cotton block; 909. Connecting pipe eight; 910. Electromagnetic vacuum valve; 911. Motor; 912. Gear one; 913. Gear two; 914. Stirring rack. Detailed Implementation

[0020] Nitrous oxide, chemically known as dinitrogen monoxide (N₂O), has a molecular structure consisting of two nitrogen atoms and one oxygen atom arranged linearly (N≡N—O or N=N=O). This molecular structure gives it both stability and some reactivity. At room temperature and pressure, it is a colorless gas with a slightly sweet taste. It is soluble in water (at 20°C, its solubility is approximately 1.1 volumes / 1 volume of water) and is easily liquefied into a colorless, transparent liquid (boiling point -88.49°C, melting point -90.8°C). In its liquid state, its density is approximately 1.22 g / cm³. It can be stored in steel cylinders under pressure or by cooling.

[0021] From a chemical perspective, nitrous oxide readily decomposes into nitrogen (N2) and oxygen (O2) at high temperatures, with the reaction formula: 2N2O → 2N2 + O2. This property makes it a combustion-supporting agent and allows it to participate in certain chemical reactions as an oxidant. In addition, it is relatively stable at room temperature and does not react violently with water or alkaline solutions (such as sodium hydroxide), but it can react with strong reducing agents (such as lithium metal) and can also decompose or participate in organic synthesis under the action of catalysts.

[0022] Nitrous oxide is one of the earliest anesthetics used in medical history. In 1844, American dentist Horace Wells first used it in dental surgery. Due to its significant analgesic effect, rapid induction of awakening, and minimal irritation to the respiratory system, it is still used as an adjunct anesthetic in dentistry, obstetrics and other fields (usually mixed with oxygen in a certain proportion, at a concentration of 30%-70%). In addition, nitrous oxide is also known as "happy gas" in pediatric surgery because it can reduce patients' anxiety.

[0023] Food-grade nitrous oxide is used as a propellant for whipped cream and coffee foam (such as whipped cream chargers). Its inertness and easy solubility in oils allow it to form stable foam and meet food safety standards (FDA, EFSA approval). In addition, nitrous oxide is used to replace carbon dioxide in the production of some sparkling beverages to obtain a finer effervescent taste, but the amount and purity must be strictly controlled.

[0024] The oxygen produced by the decomposition of nitrous oxide can be used as a combustion enhancer to improve fuel combustion efficiency. It was used in early rocket engines (such as NASA's X-15 aircraft) and is also used by car enthusiasts for "NOS (nitrogen boost system)" to instantly boost engine power.

[0025] Nitrous oxide is used as a mild oxidant in organic synthesis reactions, or as a gaseous reagent and carrier for chromatographic analysis in the laboratory.

[0026] Inhaling pure nitrous oxide can rapidly replace oxygen in the lungs, leading to hypoxic brain damage and even suffocation. Clinical cases show that it is not uncommon for abusers to fall into a coma or suffer cardiac arrest due to inhaling high concentrations of nitrous oxide (such as directly from a cream can), especially in enclosed environments where the risk is even higher. Long-term abuse of nitrous oxide can irreversibly inhibit the activity of vitamin B12, which is a key substance for maintaining the health of nerve myelin sheaths and red blood cell production. Symptoms include numbness in the limbs, difficulty walking, and memory decline. In severe cases, it can develop into peripheral neuropathy, spinal cord injury, and even mental disorders (such as depression and hallucinations). In 2015, the UK reported several cases of international students becoming paralyzed due to nitrous oxide abuse, which attracted global attention.

[0027] Nitrous oxide has an atmospheric lifetime of approximately 114 years, and its global warming potential (GWP) is 298 times that of carbon dioxide (on a 100-year timescale). It is one of the major non-carbon dioxide greenhouse gases contributing to climate change. Agricultural activities (such as nitrogen fertilizer application and livestock manure) are the main source of anthropogenic nitrous oxide emissions (accounting for about 60% of global emissions), followed by fossil fuel combustion and industrial production. Although the Montreal Protocol primarily targets ozone-depleting substances, nitrous oxide emission reduction has been included in the management issues of the United Nations Framework Convention on Climate Change, and the international community is promoting the research and development of emission reduction technologies in the agricultural and industrial sectors.

[0028] Nitrous oxide is both an "angel" driving medical progress and a "devil" threatening health. Its value and harm depend on how humans use it. From scientific research to industrial applications, from medical anesthesia to recreational abuse, the story of nitrous oxide reflects the complex relationship between technological development and social ethics. For the public, understanding its chemical nature and safety risks, and refusing to abuse it through informal channels, is the most rational attitude towards this "contradictory gas." For society, improving control policies and promoting green production and scientific use are essential to utilizing its value while avoiding environmental and health risks.

[0029] Nitrous oxide (N2O) purification devices are specialized equipment used to remove impurities from nitrous oxide gas and improve its purity. Due to the wide range of purity requirements for nitrous oxide in industrial production, medical anesthesia, food processing (such as cream foaming agent), and scientific research (ranging from 95% to over 99.99%), purification devices need to remove impurities (such as carbon dioxide, nitrogen, oxygen, water vapor, carbon monoxide, volatile organic compounds, and solid particles) through a series of physical and chemical methods to meet the needs of different scenarios.

[0030] The purity of nitrous oxide usually refers to the volume or mass fraction of its main component, nitrous oxide, in a gas mixture, generally expressed as a percentage (%), such as 99%, 99.9%, 99.99%, etc. High-purity nitrous oxide is also indicated by "N" to indicate its purity level. Industrial-grade nitrous oxide has a purity of approximately 99% to 99.5%, allowing for small amounts of impurities such as water vapor and carbon dioxide; medical-grade nitrous oxide has a purity ≥99.5% (Chinese Pharmacopoeia standard), requiring strict control of toxic impurities (such as nitric oxide, nitrogen dioxide, carbon monoxide, etc.); food-grade nitrous oxide has a purity ≥99.5%, and must comply with food additive standards (such as GB 1886.34-2021), with a focus on controlling odors, microorganisms, and harmful gases; electronic-grade or research-grade nitrous oxide has a purity ≥99.99% (commonly known as "4N"), with impurity content as low as ppm (parts per million) or even ppb (parts per billion), suitable for applications such as precision instruments and semiconductor manufacturing.

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] Please see Figures 1-5This utility model provides an embodiment of an ultrapure nitrous oxide multi-stage catalytic purification device, including a base 1, a tank 801, and a purification assembly. A condenser 2 is fixedly connected to the top of the base 1. A first connecting pipe 3, a third connecting pipe 6, and a second connecting pipe 4 are fixedly connected to the outside of the condenser 2. A molecular sieve filter 5 is fixedly connected to the outside of the second connecting pipe 4, and a fourth connecting pipe 7 is fixedly connected to the outside of the molecular sieve filter 5. The purification assembly is disposed on the top of the base 1, and the tank 801 is fixedly connected to the top of the base 1. The top of the tank is equipped with a cover 803, with bolts 804 threaded inside the cover 803. A connecting pipe 802 is fixedly connected to the top of the cover 803, and an inlet pipe 805 is fixedly connected to the bottom of the cover 803. A heating device 806 is installed inside the tank body 801, and a carbon monoxide catalyst 807 is fixedly connected inside the tank body 801. The purified nitrous oxide enters the inlet pipe 805 through the connecting pipe 802, and then enters the tank body 801 through the through hole of the inlet pipe 805, thereby uniformly heating the tank body 801. At the same time, the heating device 806 is activated to heat the tank body 801 to 280 degrees Celsius. The carbon monoxide catalyst 807 is composed of 5% platinum and aluminum oxide. It catalyzes the oxidation reaction of carbon monoxide with oxygen to produce carbon dioxide, thus oxidizing the organic matter in nitrous oxide into water and carbon dioxide. The nitrous oxide is then introduced into the condenser 2 through connecting pipe 3 (6), where the moisture and impurities are condensed and discharged through connecting pipe 1 (3). The nitrous oxide then enters the molecular sieve filter 5 through connecting pipe 2 (4), where impurities such as carbon dioxide are filtered out. Finally, ultrapure nitrous oxide is discharged through connecting pipe 4 (7). The canister 801 has threaded holes and bolts 80. 4. The threaded connection is made to the inside of the tank 801 through the threaded hole, which facilitates the connection of the tank 801 and the top cover 803 together by bolts 804; the tank 801 has a through hole one, and the connecting pipe three 6 is fixedly connected to the inside of the tank 801 through the through hole one, which facilitates the nitrous oxide in the tank 801 to enter the condensing device 2 through the connecting pipe three 6, which facilitates the condensing device 2 to condense the nitrous oxide; the feed pipe 805 has a through hole two that can buffer the gas entering, so that the nitrous oxide impacts the inside of the feed pipe 805 and is discharged from the through hole two, which facilitates the uniform entry of nitrous oxide into the tank 801.

[0033] Please see Figures 2-5In this embodiment, the purification component includes a housing 901, a connecting pipe 902 fixedly connected to the outside of the housing 901, a connecting pipe 903 fixedly connected to the outside of the housing 901, a vacuum pump 904 fixedly connected to the outside of the housing 901, a heating device 905 fixedly connected to the outside of the housing 901, a cotton block 908 fixedly connected to the inside of the housing 901, an activated carbon plate 907 fixedly connected to the inside of the housing 901, a nickel-based metal mesh plate 906 fixedly connected to the inside of the housing 901, and a connecting pipe 908 fixedly connected to the inside of the housing 901. 909, an electromagnetic vacuum valve 910 is fixedly connected to the outside of connecting pipe 8 909. A motor 911 is fixedly connected to the inside of the outer casing 901. A gear 1 912 is fixedly connected to the output end of the motor 911. A gear 2 913 meshes with the external of gear 1 912. A stirring rack 914 is fixedly connected to the outside of gear 2 913. A vacuum pump 904 evacuates the air from the outer casing 901 and discharges sodium hydroxide solution into the outer casing 901 through connecting pipe 903. Then, nitrous oxide is discharged into the outer casing 901 through connecting pipe 6 902. Then, the motor 911 is started. The rotating gear 912 drives the rotating gear 913, which in turn drives the rotating stirring frame 914, thus thoroughly mixing the sodium hydroxide solution and nitrous oxide. This facilitates the removal of impurities from the nitrous oxide. Subsequently, the heating device 905 heats the nickel-based metal mesh plate 906. Then, by opening the electromagnetic vacuum valve 910 and connecting pipe 909, the nitrous oxide enters the nickel-based metal mesh plate 906, thus drying the nitrous oxide. Next, impurities are removed from the nitrous oxide by the activated carbon plate 907, followed by secondary drying by cotton blocks 908. The purified nitrous oxide then enters the connecting tube 802; the outer shell 901 has a through hole 3, through which gear 1 912 is rotatably connected to the inside of the outer shell 901, which facilitates the motor 911 to drive gear 1 912 to rotate, which in turn facilitates gear 1 912 to drive gear 2 913 to rotate; the outer shell 901 has a through hole 4, through which the stirring rack 914 is rotatably connected to the inside of the outer shell 901, which facilitates gear 2 913 to drive the stirring rack 914 to rotate, which in turn facilitates the stirring rack 914 to stir the sodium hydroxide solution and nitrous oxide to mix thoroughly.

[0034] During operation, vacuum pump 904 evacuates the air from the outer casing 901, and sodium hydroxide solution is discharged into the outer casing 901 through connecting pipe 903. Then, nitrous oxide is introduced into the outer casing 901 through connecting pipe 902. Motor 911 is then started, driving gear 912 to rotate, which in turn drives gear 913 to rotate, which in turn drives the stirring rack 914 to rotate, thus thoroughly mixing the sodium hydroxide solution and nitrous oxide, facilitating the removal of impurities from the nitrous oxide. Heating device 905 is then activated to heat the nickel-based metal mesh plate 906. Then, electromagnetic vacuum valve 910 is opened to open connecting pipe 909, allowing nitrous oxide to enter the nickel-based metal mesh plate 906 for drying. Impurities are then removed from the nitrous oxide through activated carbon plate 907, followed by secondary drying through cotton block 908. Finally, the purified nitrous oxide enters the connecting pipe... The purified nitrous oxide enters the feed pipe 805 through the connecting pipe 802, and then enters the tank 801 through the through hole of the feed pipe 805, so that the nitrous oxide evenly heats the tank 801. At the same time, the heating device 806 is activated to heat the tank 801 to 280 degrees. The carbon monoxide catalyst 807 is composed of 5% platinum and alumina, so that the carbon monoxide catalyst 807 catalyzes the oxidation reaction of carbon monoxide and oxygen to produce carbon dioxide, thereby oxidizing the organic matter in the nitrous oxide into water and carbon dioxide. Then, the nitrous oxide is fed into the condensation device 2 through the connecting pipe 36, so that the water and impurities in the nitrous oxide are condensed into water and discharged through the connecting pipe 13. Then, the nitrous oxide enters the molecular sieve filtration device 5 through the connecting pipe 24, so that the carbon dioxide and other impurities in the nitrous oxide are filtered out. Finally, the nitrous oxide that has been purified twice is discharged through the connecting pipe 47.

[0035] Through the above steps, the purified nitrous oxide enters the feed pipe 805 through the connecting pipe 802, and then enters the tank 801 through the through hole of the feed pipe 805, thereby uniformly heating the tank 801. At the same time, the heating device 806 is activated to heat the tank 801 to 280 degrees Celsius. The carbon monoxide catalyst 807 is composed of 5% platinum and alumina, which catalyzes the oxidation reaction between carbon monoxide and oxygen to produce carbon dioxide, thereby oxidizing the organic matter in the nitrous oxide into water and carbon dioxide. Then, the nitrous oxide is fed into the condensation device 2 through the connecting pipe 6, so that the water and impurities in the nitrous oxide are condensed into water and discharged through the connecting pipe 3. Then, the nitrous oxide enters the molecular sieve filtration device 5 through the connecting pipe 4, thereby filtering out impurities such as carbon dioxide in the nitrous oxide. Finally, the ultrapure nitrous oxide is discharged through the connecting pipe 7, which is beneficial for removing organic impurities, removing reducing gases such as carbon monoxide, and purifying nitrous oxide.

Claims

1. A multi-stage catalytic purification device for ultrapure nitrous oxide, comprising a base (1), characterized in that: It also includes a tank (801) and a purification component. A condenser (2) is fixedly connected to the top of the base (1). A connecting pipe one (3) is fixedly connected to the outside of the condenser (2). A connecting pipe three (6) is fixedly connected to the outside of the condenser (2). A connecting pipe two (4) is fixedly connected to the outside of the connecting pipe two (4). A molecular sieve filtration device (5) is fixedly connected to the outside of the molecular sieve filtration device (5). A connecting pipe four (7) is fixedly connected to the outside of the molecular sieve filtration device (5). The top of the base (1) is provided with The purification component has a tank (801) fixedly connected to the top of the base (1), a top cover (803) provided on the top of the tank (801), a bolt (804) threaded inside the top cover (803), a connecting pipe (802) fixedly connected to the top of the top cover (803), a feed pipe (805) fixedly connected to the bottom of the top cover (803), a heating device (806) provided inside the tank (801), and a carbon monoxide catalyst (807) fixedly connected inside the tank (801).

2. The multi-stage catalytic purification device for ultrapure nitrous oxide according to claim 1, characterized in that: The tank body (801) has a threaded hole, and the bolt (804) is threadedly connected to the inside of the tank body (801) through the threaded hole.

3. The multi-stage catalytic purification device for ultrapure nitrous oxide according to claim 1, characterized in that: A through hole is provided on the tank body (801), and the connecting pipe three (6) is fixedly connected to the inside of the tank body (801) through the through hole.

4. The multi-stage catalytic purification device for ultrapure nitrous oxide according to claim 1, characterized in that: The feed pipe (805) has a through hole 2 that can buffer the incoming gas.

5. The multi-stage catalytic purification device for ultrapure nitrous oxide according to claim 1, characterized in that: The purification assembly includes a shell (901), a connecting pipe (902) fixedly connected to the outside of the shell (901), a connecting pipe gas (903) fixedly connected to the outside of the shell (901), a vacuum pump (904) fixedly connected to the outside of the shell (901), a heating device (905) fixedly connected to the outside of the shell (901), a cotton block (908) fixedly connected to the inside of the shell (901), and an activated carbon plate (907) fixedly connected to the inside of the shell (901). The inner fixed connection is a nickel-based metal mesh plate (906), the inner fixed connection is a connecting pipe eight (909), the outer fixed connection is an electromagnetic vacuum valve (910), the inner fixed connection is a motor (911), the output end of the motor (911) is fixedly connected to a gear one (912), the outer meshing transmission of gear one (912) is gear two (913), and the outer fixed connection of gear two (913) is a stirring rack (914).

6. The multi-stage catalytic purification device for ultrapure nitrous oxide according to claim 5, characterized in that: The outer casing (901) has a through hole three, and the gear one (912) is rotatably connected to the inside of the outer casing (901) through the through hole three.

7. The multi-stage catalytic purification device for ultrapure nitrous oxide according to claim 5, characterized in that: The outer shell (901) has a through hole four, and the stirring rack (914) is rotatably connected to the inside of the outer shell (901) through the through hole four.

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