Impurity removal equipment for removing CO2 and NO2 from nitric oxide production equipment

Abstract

The invention relates to the technical field of gas purification, and discloses impurity removal equipment for removing CO2 and NO2 for nitric oxide production equipment, which comprises a purification tower, a defoaming mechanism is mounted in the purification tower and is used for defoaming nitric oxide bubbles in a solution in the purification tower; and the defoaming mechanism comprises a gas outlet distributor, a sleeve and a gas inlet pipe. Through cooperative use of the gas outlet distributor, the sleeve and the gas inlet pipe, nitric oxide initial gas is uniformly distributed and discharged into a NaOH aqueous solution in the form of relatively fine bubbles through the gas outlet distributor, so that the gas-liquid contact area, namely the reaction absorption rate, can be greatly increased, and meanwhile, the gas-liquid contact time, namely the reaction absorption time, is increased due to the slowdown of the gas flow rising speed; by greatly increasing the gas-liquid contact time and area in the purification tower, the effect of the target purification function is greatly improved, and further, the impurity removal treatment of the device on CO2 and NO2 in nitric oxide can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas purification, in particular to impurity removal equipment used for removing CO2 and NO2 from nitric oxide production equipment. Background Art

[0002] Nitric oxide is a special gas widely used in medicine, electronics, scientific research, environmental protection and fine chemicals. In the process of preparing nitric oxide, impurities such as carbon dioxide and nitrogen dioxide will be produced due to the influence of raw material purity and reaction conditions. The presence of these impurities not only affects the purity of nitric oxide, but may also have an adverse effect on subsequent production and application. Therefore, it is necessary to use impurity removal equipment to remove CO2 and NO2 in nitric oxide to improve the purity of nitric oxide.

[0003] In the process of producing nitric oxide by the reaction of sulfuric acid and sodium nitrite, the initial nitric oxide gas produced by the chemical reaction contains more carbon dioxide and nitrogen dioxide impurities. The currently used NaOH aqueous solution is in contact with nitric oxide to achieve the method of removing CO2 and NO2 in nitric oxide. This method is to transport nitric oxide gas into the interior of the NaOH aqueous solution. The nitric oxide gas will first form bubbles in the NaOH aqueous solution and then react with the NaOH aqueous solution. In this process, the contact area between nitric oxide and the NaOH aqueous solution will be reduced, affecting the reaction of the NaOH aqueous solution with nitric oxide gas, thereby failing to provide sufficient contact area between nitric oxide gas and NaOH solution, resulting in insufficient reaction between the NaOH aqueous solution and the impurity gas, which in turn affects the device's removal of CO2 and NO2 in nitric oxide.

[0004] To this end, the present invention provides an impurity removal device for removing CO2 and NO2 from a nitric oxide production device. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The present invention provides an impurity removal device for removing CO and NO from a nitric oxide production device, comprising a purification tower; a defoaming mechanism is installed inside the purification tower, which is used to defoam nitric oxide bubbles in a solution inside the purification tower; The defoaming mechanism includes an air outlet distributor, a sleeve and an air inlet pipe. Two groups of air outlet distributors are symmetrically installed in the upper and lower parts of the purification tower. A sleeve is installed at the central position between the two groups of air outlet distributors. An air inlet pipe is installed at one end of the sleeve, and one end of the air inlet pipe passes through the interior of the purification tower.

[0007] By adopting the above technical scheme, the nitric oxide bubbles will collide when they are discharged from the two groups of gas outlet distributors respectively. The collision can achieve defoaming treatment, so that the nitric oxide bubbles can be broken, and the nitric oxide can react more fully with the NaOH aqueous solution to achieve the effect of removing CO2 and NO2. This can greatly increase the gas-liquid contact area, that is, the reaction absorption rate, and increase the gas-liquid contact time, that is, the reaction absorption time.

[0008] Preferably, the top of the purification tower is provided with an air outlet, the side of the purification tower is provided with a liquid filling port, and the bottom of the purification tower is provided with a liquid discharge port.

[0009] By adopting the above technical solution, the inside of the purification tower can be vented, drained and liquid added, so that the nitric oxide primary gas can be better removed from the inside of the purification tower in the later stage.

[0010] Preferably, a valve is installed on the outer side of one end of the air inlet pipe away from the purification tower, and a filter cartridge is installed on the end of the air inlet pipe away from the purification tower.

[0011] By adopting the above-mentioned technical scheme, it is possible to achieve preliminary filtration treatment of the nitric oxide primary gas transported to the interior of the purification tower, thereby preventing large impurities carried in the untreated nitric oxide primary gas from clogging the exhaust holes inside the gas outlet distributor, thereby not affecting the reaction and impurity removal treatment of the nitric oxide primary gas with the NaOH solution inside the purification tower.

[0012] Preferably, a rotating rod is rotatably installed inside the sleeve, and multiple groups of fan blades are installed on the outer surface of the rotating rod. The multiple groups of fan blades are distributed in equal rows on the outer surface of the air outlet distributor in a circle, and a stirring rod is installed on the top of the rotating rod passing through the inside of the sleeve.

[0013] By adopting the above technical solution, the nitric oxide gas that is not fully defoamed inside the purification tower can be defoamed, so that the nitric oxide bubbles can fully react with the NaOH solution to achieve the purpose of removing CO2 and NO2.

[0014] Preferably, a partition is installed inside the purification tower near the top of the stirring rod, and a through hole is provided inside the partition.

[0015] By adopting the above technical solution, the space inside the purification tower can be divided, which is convenient for removing impurities from the nitric oxide gas.

[0016] Preferably, a torsion spring rod is installed on one side of the bottom of the partition close to the through hole, and a baffle is installed on the bottom end of the torsion spring rod, and the baffle is located directly below the through hole.

[0017] Preferably, a push rod is installed at the top end of the stirring rod, which is used to squeeze the baffle plate so that the baffle plate is displaced to expose the through hole.

[0018] By adopting the above technical solution and discharging the purified gas by intermittently exposing the inside of the through hole, the residence time of the nitric oxide gas inside the purification tower can be extended, so that the nitric oxide gas can be better removed from CO2 and NO2 inside the purification tower.

[0019] Preferably, a circulation mechanism is installed on the side of the purification tower, which is used to circulate and transport the purification solution in the purification tower.

[0020] Preferably, the circulation mechanism includes a circulation box, a power pump and a spray pipe. The circulation box is installed on the side of the purification tower, the power pump is installed on the top of the circulation box, the input end of the power pump is connected to the circulation box, and the output end of the power pump is installed with a spray pipe. The spray end of the spray pipe is located inside the purification tower, and the spray end of the spray pipe is located on the top of the partition.

[0021] By adopting the above technical scheme, the treatment effect of the device on CO2 and NO2 in nitric oxide gas can be improved. By spraying the solution in a spraying manner, the gas flowing to the top of the partition can be decontaminated again, thereby improving the treatment effect of CO2 and NO2 in the nitric oxide gas of the device.

[0022] Preferably, a filter plate is installed inside the circulation box, and the filter plate is arranged at an incline.

[0023] By adopting the above technical solution, the reaction products or precipitates in the solution can be blocked to avoid clogging the spray holes inside the spray pipe.

[0024] The beneficial effects of the present invention are as follows: the impurity removal equipment for removing CO2 and NO2 from the nitric oxide production equipment described in the present invention is used in combination with an air outlet distributor, a sleeve and an air inlet pipe. When the nitric oxide bubbles are discharged from the two groups of air outlet distributors respectively, a collision will occur. The collision can achieve defoaming treatment, so that the nitric oxide bubbles are broken, and the nitric oxide reacts more fully with the NaOH aqueous solution to achieve the effect of removing CO2 and NO2. The initial nitric oxide gas is discharged into the NaOH aqueous solution in the form of relatively fine bubbles uniformly distributed through the air outlet distributor, which can greatly increase the area of ​​gas-liquid contact, that is, the reaction absorption rate. At the same time, because the rising speed of the airflow is slowed down, the gas-liquid contact time, that is, the reaction absorption time, is increased. By greatly increasing the time and area of ​​gas-liquid contact in the purification tower, the effect of the target purification function is greatly improved, and then the device can improve the impurity removal treatment of CO2 and NO2 in nitric oxide.

[0025] The impurity removal equipment for removing CO2 and NO2 from nitric oxide production equipment described in the present invention is used in combination with a rotating rod, fan blades and a stirring rod. When the initial nitric oxide gas is transported to the inside of the sleeve through an air inlet pipe, multiple groups of fan blades will be prompted to drive the rotating rod to rotate under the action of the gas. When the rotating rod rotates, the stirring rod on the top will be driven to rotate. Through the rotation of the stirring rod, the nitric oxide bubbles in the NaOH solution above the gas outlet distributor inside the purification tower that have not been defoamed by the two groups of gas outlet distributors can be struck and defoamed, so that the nitric oxide gas can fully react with the NaOH solution to achieve the purpose of removing CO2 and NO2.

[0026] The impurity removal equipment for removing CO2 and NO2 from nitric oxide production equipment described in the present invention is used in combination with a push rod, a baffle, a torsion spring rod and a partition. The push rod at the top is rotated synchronously by the rotation of the stirring rod. When the push rod rotates to squeeze the baffle, the baffle rotates with the torsion spring rod as a fulcrum. When the baffle is removed from the bottom of the through hole, the purified gas inside the purification tower will be transported to the top of the partition. By intermittently exposing the inside of the through hole to discharge the purified gas, the residence time of the nitric oxide gas inside the purification tower can be extended, so that the nitric oxide gas can be better treated to remove CO2 and NO2 inside the purification tower.

[0027] The impurity removal equipment for removing CO2 and NO2 from nitric oxide production equipment described in the present invention is used in conjunction with a circulation box, a filter plate, a power pump and a spray pipe. The filter plate can block the reaction products or precipitates in the solution, and then the power pump can transport the solution coming out of the circulation box to the spray end of the spray pipe. By spraying the solution in a spraying manner, the gas flowing to the top of the partition can be treated with impurities again, thereby improving the treatment effect of CO2 and NO2 in the nitric oxide gas of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a stereogram of an embodiment of the present invention; Figure 2 is an internal stereogram of an embodiment of the present invention; Figure 3 It is a schematic diagram of the internal structure of the sleeve part in the present invention; Figure 4 It is a schematic diagram of the bottom structure of the partition in the present invention; Figure 5 It is a schematic diagram of the baffle structure in the present invention; Figure 6 It is a schematic diagram of the internal structure of the circulation mechanism part in the present invention.

[0029] Description of reference numerals: 1. Purification tower; 101. Air outlet; 102. Liquid discharge port; 103. Liquid filling port; 104. Partition plate; 105. Through hole; 2. Defoaming mechanism; 201. Air outlet distributor; 202. Sleeve; 2021. Rotating rod; 2022. Fan blade; 2023. Stirring rod; 2024. Push rod; 203. Air inlet pipe; 2031. Valve; 2032. Filter cartridge; 3. Baffle; 301. Torsion spring rod; 4. Circulation mechanism; 401. Circulation box; 4011. Filter plate; 402. Power pump; 403. Spray pipe. DETAILED DESCRIPTION

[0030] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples. Example

[0031] The following is a further detailed description of the technical solution of the present invention in conjunction with the accompanying drawings and specific embodiments. Figures 1 to 6 , the impurity removal equipment for removing CO2 and NO2 from the nitric oxide production equipment provided in this application, please refer to Figure 1 , Figure 2 and Figure 3 , comprising a purification tower 1; a defoaming mechanism 2 is installed inside the purification tower 1, which is used to defoam the nitric oxide bubbles in the solution inside the purification tower 1. The purification tower 1 adopts a vertical cylindrical structure, and a certain height of NaOH aqueous solution is filled in the container. After the nitric oxide primary gas directly contacts and reacts with the NaOH aqueous solution, CO2 and NO2 therein are removed; The defoaming mechanism 2 includes an air outlet distributor 201, a sleeve 202 and an air inlet pipe 203. Two groups of air outlet distributors 201 are symmetrically installed in the purification tower 1. The air outlet distributor 201 is provided with an exhaust hole. When the air pressure inside the air outlet distributor 201 is higher than that outside, a certain pressure barrier is formed to prevent liquid from entering through the exhaust hole. A sleeve 202 is installed at the central position between the two groups of air outlet distributors 201. The upper and lower ends of the sleeve 202 are respectively connected to the inside of one group of air outlet distributors 201. The two groups of air outlet distributors The gas distributor 201 is in a relative position, one end of the sleeve 202 is equipped with an air inlet pipe 203, one end of the air inlet pipe 203 passes through the interior of the purification tower 1, the gas outlet distributor 201 is composed of a main pipe and a branch pipe, the main pipe and the branch pipes are interconnected, the pipe diameter is DN20-25mm, the pipe center distance is 40-50mm, and a small exhaust hole is opened at the bottom of each branch pipe, the hole diameter is Φ2mm, and the hole center distance is 20-25mm. The pipe openings of the gas outlet distributor 201 are capped, and the two ends of the main pipe and the central branch pipe are fixed to the inner wall of the purification tower 1 by electric welding.

[0032] Specifically, the nitric oxide initial gas is transported to the interior of the sleeve 202 through the air inlet pipe 203, and then the nitric oxide gas is transported to the two groups of gas outlet distributors 201 through the interior of the sleeve 202. The nitric oxide initial gas is discharged into the NaOH aqueous solution in the form of relatively fine bubbles through the gas outlet distributors 201. This can greatly increase the gas-liquid contact area, that is, the reaction absorption rate. At the same time, the gas-liquid contact time, that is, the reaction absorption time, is increased due to the slowdown in the rising speed of the airflow. The two groups of gas outlet distributors 201 are arranged in a relative state. When the nitric oxide bubbles are discharged from the two groups of gas outlet distributors 201 respectively, a collision will occur. The collision can achieve defoaming treatment, causing the nitric oxide bubbles to burst, and the nitric oxide can react more fully with the NaOH aqueous solution to achieve the effect of removing CO2 and NO2.

[0033] Please refer to Figure 1 A gas outlet 101 is provided at the top of the purification tower 1 , a liquid adding port 103 is provided at the side of the purification tower 1 , and a liquid discharge port 102 is provided at the bottom of the purification tower 1 .

[0034] Specifically, in order to realize the exhaust, liquid discharge and liquid addition inside the purification tower 1, the nitric oxide gas after purification and impurity removal inside the purification tower 1 will be discharged through the gas outlet 101. After being used for a period of time, the NaOH solution after impurity removal of the nitric oxide gas inside the purification tower 1 will be discharged through the liquid discharge port 102. Then the worker can inject new NaOH solution into the purification tower 1 through the liquid addition port 103, so that the nitric oxide initial gas inside the purification tower 1 can be better impurity-removed in the later stage, thereby facilitating the worker's operation.

[0035] Please refer to Figure 2A valve 2031 is installed on the outer side of the end of the air inlet pipe 203 away from the purification tower 1, and a filter cartridge 2032 is installed on the end of the air inlet pipe 203 away from the purification tower 1. The filter cartridge 2032 consists of a cylinder body and a filter screen. The filter screen is arranged inside the cylinder body to block large impurities in the nitric oxide primary gas.

[0036] Specifically, in order to achieve preliminary filtering treatment of the nitric oxide primary gas transported to the interior of the purification tower 1 and prevent large impurities carried in the untreated nitric oxide primary gas from clogging the exhaust holes inside the gas outlet distributor 201, the worker opens the valve 2031 to connect the filter cartridge 2032 and the interior of the air inlet pipe 203. When the untreated nitric oxide primary gas is transported to the interior of the filter cartridge 2032, the large impurities in the nitric oxide primary gas can be blocked by the filter cartridge 2032 to prevent the large impurities contained therein from being transported to the interior of the gas outlet distributor 201, causing the exhaust holes inside the gas outlet distributor 201 to be blocked, thereby affecting the reaction and impurity removal treatment of the nitric oxide primary gas with the NaOH solution inside the purification tower 1. When the worker closes the valve 2031, the filter cartridge 2032 and the interior of the air inlet pipe 203 can be disconnected, and at this time, the external gas cannot be transported to the interior of the purification tower 1.

[0037] Please refer to Figure 3 A rotating rod 2021 is rotatably installed inside the sleeve 202, and a plurality of groups of fan blades 2022 are installed on the outer surface of the rotating rod 2021. The plurality of fan blades 2022 are distributed in a circular pattern on the outer surface of the gas outlet distributor 201. A stirring rod 2023 is installed on the top of the rotating rod 2021 passing through the inside of the sleeve 202.

[0038] Specifically, in order to achieve the defoaming treatment of the nitric oxide gas that has not been fully defoamed inside the purification tower 1 and make the nitric oxide bubbles fully react with the NaOH solution, when the initial nitric oxide gas is transported to the inside of the sleeve 202 through the air inlet pipe 203, it will prompt multiple groups of fan blades 2022 to drive the rotating rod 2021 to rotate under the action of the gas. When the rotating rod 2021 rotates, it will drive the stirring rod 2023 on the top to rotate. Through the rotation of the stirring rod 2023, the nitric oxide bubbles in the NaOH solution above the gas outlet distributor 201 inside the purification tower 1 that have not been defoamed by the two groups of gas outlet distributors 201 can be struck and defoamed, so that the nitric oxide bubbles can fully react with the NaOH solution, thereby achieving the purpose of removing CO2 and NO2.

[0039] Please refer to Figure 4 A partition 104 is installed inside the purification tower 1 near the top of the stirring rod 2023. A through hole 105 is provided inside the partition 104. The partition 104 can divide the space inside the purification tower 1 to facilitate the removal of impurities from the nitric oxide gas.

[0040] Please refer to Figure 4 and Figure 5 A torsion spring rod 301 is installed on one side of the bottom of the partition 104 close to the through hole 105, and a baffle 3 is installed on the bottom end of the torsion spring rod 301. The torsion spring rod 301 consists of a rod body and a torsion spring, one end of the torsion spring is connected to the partition 104, and the other end of the torsion spring is connected to the baffle 3. The top of the rod body is rotatably connected to the partition 104, and the bottom end of the rod body is connected to the baffle 3. The baffle 3 is located directly below the through hole 105, and the area of ​​the baffle 3 is larger than the area of ​​the through hole 105. The baffle 3 is used to block the through hole 105. When the baffle 3 is removed from the bottom of the through hole 105, the nitric oxide gas after impurity removal can be transported to the top of the partition 104 through the inside of the through hole 105. When the baffle 3 blocks the through hole 105, the nitric oxide gas can fully react with the NaOH solution inside the purification tower 1 to remove impurities.

[0041] Please refer to Figure 4 and Figure 5 A push rod 2024 is installed at the top of the stirring rod 2023, which is used to squeeze the baffle 3 so that the baffle 3 is displaced to expose the through hole 105.

[0042] Specifically, in order to extend the residence time of nitric oxide gas inside the purification tower 1 and enable the nitric oxide gas to be better treated with CO2 and NO2 inside the purification tower 1, when the stirring rod 2023 rotates, it will synchronously drive the push rod 2024 at the top. When the push rod 2024 rotates to squeeze the baffle 3, the baffle 3 will rotate with the torsion spring rod 301 as the fulcrum. When the baffle 3 is removed from the bottom of the through hole 105, the purified gas inside the purification tower 1 will be transported to the top of the partition 104. By intermittently exposing the inside of the through hole 105 to discharge the purified gas, the residence time of nitric oxide gas inside the purification tower 1 can be extended, so that the nitric oxide gas can be better treated with CO2 and NO2 inside the purification tower 1.

[0043] Please refer to Figure 1 A circulation mechanism 4 is installed on the side of the purification tower 1, which is used to circulate and transport the purification solution in the purification tower 1.

[0044] Please refer to Figure 1 and Figure 6The circulation mechanism 4 includes a circulation box 401, a power pump 402 and a spray pipe 403. The circulation box 401 is installed on the side of the purification tower 1, and the power pump 402 is installed on the top of the circulation box 401. The input end of the power pump 402 is connected to the circulation box 401, and the output end of the power pump 402 is installed with a spray pipe 403. The spray end of the spray pipe 403 is located inside the purification tower 1, and the spray end of the spray pipe 403 is located at the top of the partition 104. The spray end of the spray pipe 403 is located at the top of the partition 104, and a plurality of groups of spray ports are provided inside. The NaOH solution initially treated inside the circulation box 401 will be sprayed again through the inside of the spray port.

[0045] Please refer to Figure 6 A filter plate 4011 is installed inside the circulation box 401. The filter plate 4011 is set at an angle. The filter plate 4011 is a filter net that can block reaction products or precipitates in the solution.

[0046] Specifically, in order to improve the device's treatment of CO2 and NO2 in nitric oxide gas, the solution after decontamination of nitric oxide inside the purification tower 1 will be transported to the inside of the circulation box 401, and the reaction products or precipitates in the solution can be blocked by the filter plate 4011. Then, the power pump 402 works, and the input end of the power pump 402 transports the solution coming out of the circulation box 401 to the spray end of the spray pipe 403. By spraying the solution in a spraying manner, the gas flowing to the top of the partition 104 can be decontaminated again, thereby improving the device's treatment of CO2 and NO2 in nitric oxide gas.

[0047] Working principle: The worker opens the valve 2031 to connect the filter cartridge 2032 and the inside of the air inlet pipe 203. When the untreated nitric oxide gas is transported to the inside of the filter cartridge 2032, the large impurities in the nitric oxide gas can be blocked by the filter cartridge 2032. Then, the nitric oxide gas produced by the nitric oxide production equipment is transported to the inside of the sleeve 202 through the air inlet pipe 203, which will cause the multiple groups of fan blades 2022 to drive the rotating rod 2021 to rotate under the action of the gas. When the rotating rod 2021 rotates, it will drive the stirring rod 2023 on the top to rotate. Then, the nitric oxide gas is transported to the two groups of gas outlet distributors 201 through the inside of the sleeve 202. The gas will bubble out from the exhaust hole inside the gas outlet distributor 201. When the nitric oxide bubbles are discharged from the two groups of gas outlet distributors 201 respectively, they will collide. Through the collision, defoaming treatment can be achieved, so that the nitric oxide bubbles burst, and the nitric oxide gas reacts more fully with the NaOH aqueous solution. At the same time, through the rotation of the stirring rod 2023, the nitric oxide bubbles in the NaOH solution above the gas outlet distributor 201 inside the purification tower 1 that have not been defoamed by the two groups of gas outlet distributors 201 can be struck and defoamed, so that the nitric oxide bubbles fully react with the NaOH solution. When the stirring rod 2023 rotates, it will synchronously drive the top When the push rod 2024 rotates to squeeze the baffle 3, the baffle 3 will rotate with the torsion spring rod 301 as the fulcrum. When the baffle 3 is removed from the bottom of the through hole 105, the purified gas in the purification tower 1 will be transported to the top of the partition 104. By intermittently exposing the inside of the through hole 105 to discharge the purified gas, the residence time of the nitric oxide gas in the purification tower 1 can be extended, so that the nitric oxide gas can be better treated to remove CO2 and NO2 in the purification tower 1. The solution after the nitric oxide is removed from the purification tower 1 will be transported to the inside of the circulation box 401, and the solution can be filtered through the filter plate 4011. The reaction products or precipitates in the liquid are blocked, and then the power pump 402 works. The input end of the power pump 402 transports the solution coming out of the circulation box 401 to the spray end of the spray pipe 403. By spraying the solution in a spraying manner, the gas flowing to the top of the partition 104 can be treated with impurities again, so as to improve the treatment of CO2 and NO2 in the nitric oxide gas of the device. Finally, the nitric oxide gas after impurities removal will be discharged from the gas outlet 101. After using it for a period of time, the used liquid can be discharged by directly opening the drain port 102 at the bottom, and then the NaOH liquid can be added to the purification tower 1 through the liquid filling port 103.

[0048] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. An impurity removal device for removing CO2 and NO2 from a nitric oxide production device, comprising a purification tower (1); characterized in that: A defoaming mechanism (2) is installed inside the purification tower (1) for defoaming the nitric oxide bubbles in the solution inside the purification tower (1); The defoaming mechanism (2) comprises an air outlet distributor (201), a sleeve (202) and an air inlet pipe (203); two groups of air outlet distributors (201) are symmetrically installed in the interior of the purification tower (1) in an upper and lower manner; a sleeve (202) is installed at a central position between the two groups of air outlet distributors (201); an air inlet pipe (203) is installed at one end of the sleeve (202); and one end of the air inlet pipe (203) passes through the interior of the purification tower (1).

2. The impurity removal device for removing CO2 and NO2 from a nitric oxide production device according to claim 1, characterized in that: The top of the purification tower (1) is provided with an air outlet (101), the side of the purification tower (1) is provided with a liquid filling port (103), and the bottom of the purification tower (1) is provided with a liquid discharge port (102).

3. The impurity removal device for removing CO2 and NO2 from a nitric oxide production device according to claim 1, characterized in that: A valve (2031) is installed on the outer side of the end of the air inlet pipe (203) away from the purification tower (1), and a filter cartridge (2032) is installed on the end of the air inlet pipe (203) away from the purification tower (1).

4. The impurity removal device for removing CO2 and NO2 from a nitric oxide production device according to claim 1, characterized in that: A rotating rod (221) is rotatably mounted inside the sleeve (202), and a plurality of groups of fan blades (222) are mounted on the outer surface of the rotating rod (2021). The plurality of fan blades (222) are distributed in a circular pattern on the outer surface of the air outlet distributor (201), and a stirring rod (223) is mounted on the top end of the rotating rod (221) passing through the interior of the sleeve (202).

5. The impurity removal device for removing CO2 and NO2 from a nitric oxide production device according to claim 4, characterized in that: A partition plate (104) is installed inside the purification tower (1) near the top of the stirring rod (2023), and a through hole (105) is provided inside the partition plate (104).

6. The impurity removal device for removing CO2 and NO2 from a nitric oxide production device according to claim 5, characterized in that: A torsion spring rod (301) is installed on one side of the bottom of the partition (104) close to the through hole (105), and a baffle (3) is installed at the bottom end of the torsion spring rod (301), and the baffle (3) is located directly below the through hole (105).

7. The impurity removal device for removing CO2 and NO2 from a nitric oxide production device according to claim 6, characterized in that: A push rod (2024) is installed at the top end of the stirring rod (2023) and is used to press the baffle plate (3) so that the baffle plate (3) is displaced to expose the through hole (105).

8. The impurity removal device for removing CO2 and NO2 from a nitric oxide production device according to claim 1, characterized in that: A circulation mechanism (4) is installed on the side of the purification tower (1) for circulating the purification solution in the purification tower (1).

9. The impurity removal device for removing CO2 and NO2 from a nitric oxide production device according to claim 8, characterized in that: The circulation mechanism (4) comprises a circulation box (401), a power pump (402) and a spray pipe (403); the circulation box (401) is installed on the side of the purification tower (1); the power pump (402) is installed on the top of the circulation box (401); the input end of the power pump (402) is connected to the circulation box (401); the output end of the power pump (402) is installed with the spray pipe (403); the spray end of the spray pipe (403) is located inside the purification tower (1), and the spray end of the spray pipe (403) is located on the top of the partition (104).

10. The impurity removal device for removing CO2 and NO2 from a nitric oxide production device according to claim 9, characterized in that: A filter plate (4011) is installed inside the circulation box (401), and the filter plate (4011) is arranged in an inclined manner.

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