Air separation rectifying tower

Abstract

The utility model discloses an air separation rectifying tower, which relates to the technical field of rectifying towers and comprises a base plate, a synchronous rectifying mechanism is arranged above the base plate and used for separating and rectifying two gases, the synchronous rectifying mechanism comprises a rectifying unit and a dispersing unit, the rectifying unit is arranged above the base plate, and the dispersing unit is arranged above the base plate. Comprising a first rectifying tower and a second rectifying tower which are fixedly installed at the top of a base plate, boiling assemblies are arranged in the first rectifying tower and the second rectifying tower, and the first rectifying tower and the second rectifying tower are provided with a second vaporization assembly and a first vaporization assembly correspondingly; the temperatures of boiling assemblies in the two towers are respectively controlled by vaporization of liquid oxygen and liquid nitrogen, so that synchronous high-purity separation of oxygen and nitrogen is realized. The double-tower structure breaks through the temperature limitation of a traditional single tower, the problem of synchronous rectification of oxygen and nitrogen is solved, and the separation efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of distillation column technology, specifically to an air separation distillation column. Background Technology

[0002] Air separation is the process of separating various gases from the air and using them for different purposes based on their different properties. The basic principle of air separation is to liquefy the air and then, based on the different volatility of each component in the air, place the liquid air in a certain temperature environment to allow a certain gas in the liquid air to return to a gaseous state.

[0003] According to the patent titled "A Distillation Column for Air Separation" (Patent Publication No.: CN220892714U, Patent Publication Date: 2024-05-03), the column includes a column body, an inlet pipe on the upper side of the column body, a first nozzle connected to the inlet pipe, packing material installed below the first nozzle in the column body, an axial flow fan below the packing material, a second nozzle below the axial flow fan, a hot gas pipe on the lower side of the column body connected to the second nozzle, and a steam supply unit connected to the hot gas pipe. An exhaust valve and a drain valve are respectively installed at the upper and lower ends of the column body. The axial flow fan disperses the liquid remaining on the packing material and the steam ejected from the second nozzle. The axial flow fan also pushes the liquid air inside the packing material, thereby increasing the contact area and contact time between the liquid air and the steam, thus improving the efficiency of air separation.

[0004] Based on the aforementioned existing technology, the existing air separation distillation column still has the following problems. The existing air separation distillation column usually performs distillation work through a single column. However, due to temperature limitations, traditional single columns cannot achieve simultaneous high-purity separation of oxygen and nitrogen. Therefore, this utility model provides an air separation distillation column. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an air separation distillation column, which solves the following problems that existing air separation distillation columns still have: existing air separation distillation columns usually carry out distillation work through a single column; however, due to temperature limitations, traditional single columns cannot achieve simultaneous high-purity separation of oxygen and nitrogen.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an air separation distillation column, comprising a base plate, wherein a simultaneous distillation mechanism is disposed above the base plate for separating and distilling two gases, the simultaneous distillation mechanism comprising:

[0007] The distillation unit, located above the base plate, includes a first distillation column and a second distillation column fixedly installed on the top of the base plate. Both the first and second distillation columns are equipped with boiling components. A second vaporization component and a first vaporization component are respectively located on the right side of the first and second distillation columns. The second vaporization component and the first vaporization component have the same structure. The boiling components are heated to different temperatures by using liquid nitrogen and liquid oxygen vaporization respectively through the second vaporization component and the first vaporization component. The air-liquid mixture after distillation in the first distillation column is fed into the second distillation column for further distillation through a conveying component, thereby achieving simultaneous distillation and separation of nitrogen and oxygen in the air-liquid mixture.

[0008] The dispersion unit is respectively installed inside the first distillation column and the second distillation column, and is used to achieve uniform dispersion of air and liquid on the boiling component.

[0009] Preferably, an inlet pipe is fixedly installed at the left end of the first distillation column, an inlet pipe is fixedly installed at the left end of the second distillation column, and an exhaust pipe is fixedly installed at the top of both the first and second distillation columns.

[0010] Preferably, the boiling component includes an arc-shaped disk fixedly installed inside the first distillation column and the second distillation column. Several arc plates are fixedly installed inside the arc-shaped disk. Several vent holes are arranged in a circumferential array on the arc plates, and several water holes are arranged in the circumferential edge of the arc-shaped disk.

[0011] Preferably, the delivery assembly includes a vacuum pump fixedly installed on the top of the base plate, an input pipe fixedly installed at the output end of the vacuum pump, one end of the input pipe being fixedly connected to the delivery pipe, an output pipe fixedly installed at the input end of the vacuum pump, and one end of the output pipe penetrating the side wall of the first distillation column and extending into the interior of the first distillation column.

[0012] Preferably, the first vaporization component includes a set of liquefaction machines and vaporization machines fixedly installed on the top of the base plate. The input end of the liquefaction machine is fixedly installed with a reflux pipe, and one end of the reflux pipe extends through the rear wall of the first distillation column and the second distillation column to the bottom rear side of the arc plate and communicates with it. The output end of the liquefaction machine and the input end of the vaporization machine are fixedly connected by a connecting pipe. The output end of the vaporization machine is fixedly installed with a gas supply pipe, and the gas supply pipe extends through the front wall of the first distillation column and the second distillation column to the bottom front side of the arc plate and communicates with it.

[0013] Preferably, the dispersion unit includes an installation box fixedly installed inside the first distillation column and the second distillation column. A rotating tube is rotatably installed inside the installation box. A liquid separator is fixedly installed at the bottom end of the rotating tube. Several spray heads are fixedly installed at the bottom of the liquid separator. The top of the rotating tube is rotatably connected to the inlet pipe and the delivery pipe, respectively. A motor base is fixedly installed on the right side of both the first and second distillation columns. A drive motor is fixedly installed on the right side of the motor base. A rotating shaft is fixedly installed at the output end of the drive motor. One end of the rotating shaft extends through the motor base into the installation box and is fixedly fitted with small conical teeth. Large conical teeth are fixedly installed on the surface of the rotating tube, and the large conical teeth mesh with the small conical teeth. A limiting plate is fixedly installed inside the installation box, and the rotating shaft rotates inside the limiting plate.

[0014] This invention provides an air separation distillation column. Compared with the prior art, it has the following advantages:

[0015] 1. This air separation distillation column, by setting up a first distillation column and a second distillation column, each equipped with a second vaporization component and a first vaporization component respectively, utilizes the vaporization of liquid oxygen and liquid nitrogen to control the temperature of the boiling components in the two columns, thereby achieving simultaneous high-purity separation of oxygen and nitrogen. The dual-tower structure overcomes the temperature limitations of traditional single-tower systems, solves the problem of simultaneous oxygen and nitrogen distillation, and significantly improves separation efficiency.

[0016] 2. This air separation distillation column is equipped with a dispersion unit. The drive motor drives the rotating shaft to rotate, the rotating shaft drives the small conical teeth to rotate, the small conical teeth drive the rotating tube to rotate, and the rotating tube drives the liquid distribution plate and the spray head to rotate. This makes the liquid sprayed from the spray head rotate and fall, so that the liquid is evenly distributed on the arc plate, thereby improving the efficiency of air-liquid distillation. Attached Figure Description

[0017] Figure 1 This is a right-side perspective view of the structure of this utility model;

[0018] Figure 2 This is a partial cross-sectional perspective view of the present invention.

[0019] Figure 3 This is a partial cross-sectional view of the upper three-dimensional structure of this utility model;

[0020] Figure 4 This is a partial cross-sectional view of the lower three-dimensional structure of this utility model.

[0021] In the diagram: 1-Base plate, 2-Synchronous distillation mechanism, 21-Distillation unit, 211-First distillation column, 212-Second distillation column, 213-Exhaust pipe, 214-Liquid delivery pipe, 215-Liquid inlet pipe, 22-Dispersion unit, 221-Mounting box, 222-Rotator, 223-Limiting plate, 224-Distribution tray, 225-Spray head, 226-Motor base, 227-Drive motor, 228 - Shaft, 229 Small bevel gear, 2210 Large bevel gear, 3 Conveying assembly, 31 Vacuum pump, 32 Input pipe, 33 Output pipe, 4 First vaporization assembly, 41 Liquefaction machine, 42 Return pipe, 43 Connecting pipe, 44 Vacuumization machine, 45 Gas supply pipe, 5 Second vaporization assembly, 6 Boiling assembly, 61 Arc disc, 62 Arc plate, 63 Vent hole, 64 Water passage hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4 This utility model provides a technical solution:

[0024] An air separation distillation column includes a base plate 1, and a simultaneous distillation mechanism 2 is disposed above the base plate 1 for separating and distilling two gases. The simultaneous distillation mechanism 2 includes:

[0025] The distillation unit 21 is disposed above the base plate 1 and includes a first distillation column 211 and a second distillation column 212 fixedly installed on the top of the base plate 1. Both the first distillation column 211 and the second distillation column 212 are provided with boiling components 6. The right sides of the first distillation column 211 and the second distillation column 212 are respectively provided with a second vaporization component 5 and a first vaporization component 4. The second vaporization component 5 and the first vaporization component 4 have the same structure. The boiling components 6 are heated to different temperatures by using liquid nitrogen and liquid oxygen vaporization in the second vaporization component 5 and the first vaporization component 4, respectively. The air-liquid mixture after distillation in the first distillation column 211 is fed into the second distillation column 212 for distillation through the conveying component 3, so as to realize the simultaneous distillation and separation of nitrogen and oxygen in the air-liquid mixture.

[0026] The dispersion unit 22 is respectively disposed inside the first distillation column 211 and the second distillation column 212, and is used to achieve uniform dispersion of air and liquid on the boiling component 6.

[0027] By setting up a first distillation column 211 and a second distillation column 212, and equipping them with a second vaporization component 5 and a first vaporization component 4 respectively, the temperatures of the boiling components 6 in the two columns are controlled at -183℃ and -196℃ respectively using the vaporization of liquid oxygen and liquid nitrogen, thus achieving simultaneous high-purity separation of oxygen and nitrogen. This dual-column structure overcomes the temperature limitations of traditional single-column systems, solves the problem of simultaneous oxygen and nitrogen distillation, and significantly improves separation efficiency.

[0028] In this embodiment, an inlet pipe 215 is fixedly installed on the left end of the first distillation column 211, and an inlet pipe 214 is fixedly installed on the left end of the second distillation column 212. An exhaust pipe 213 is fixedly installed on the top of both the first distillation column 211 and the second distillation column 212.

[0029] In this embodiment, the boiling component 6 includes an arc disk 61 fixedly installed inside the first distillation column 211 and the second distillation column 212. Several arc plates 62 are fixedly installed inside the arc disk 61. Several ventilation holes 63 are arranged in a circular array on the arc plates 62, and several water holes 64 are arranged on the circumference of the edge of the arc disk 61.

[0030] The geometric design of the arc disk 61 and arc plate 62, combined with the vent 63 and water vent 64, optimizes the gas-liquid contact area and flow path. The vent promotes uniform gas distribution, while the water vent guides unvaporized liquid downwards, avoiding localized temperature unevenness and improving boiling efficiency and separation purity.

[0031] In this embodiment, the delivery assembly 3 includes a vacuum pump 31 fixedly installed on the top of the base plate 1. An input pipe 32 is fixedly installed at the output end of the vacuum pump 31, and one end of the input pipe 32 is fixedly connected to the liquid delivery pipe 214. An output pipe 33 is fixedly installed at the input end of the vacuum pump 31, and one end of the output pipe 33 penetrates the side wall of the first distillation column 211 and extends into the interior of the first distillation column 211.

[0032] Vacuum pump 31, model Y90L-4, is electrically connected to an external power source and operated via a manual control panel. Vacuum pump 31 efficiently transports the unvaporized liquid from the first distillation column to the second distillation column through output pipe 33 and input pipe 32. This design achieves seamless connection between the two columns, avoiding manual intervention and ensuring the continuity and automation of the distillation process.

[0033] In this embodiment, the first vaporization component 4 includes a set of liquefaction machines 41 and vaporization machines 44 fixedly installed on the top of the base plate 1. The input end of the liquefaction machine 41 is fixedly installed with a reflux pipe 42, and one end of the reflux pipe 42 extends through the rear wall of the first distillation column 211 and the second distillation column 212 to the bottom rear side of the arc disk 61 and communicates with it. The output end of the liquefaction machine 41 and the input end of the vaporization machine 44 are fixedly connected by a connecting pipe 43. The output end of the vaporization machine 44 is fixedly installed with a gas supply pipe 45, and the gas supply pipe 45 extends through the front wall of the first distillation column 211 and the second distillation column 212 to the bottom front side of the arc disk 61 and communicates with it.

[0034] The liquefaction unit 41 (model HGD04) and the vaporization unit 44 (model MV-2272) are both electrically connected to an external power source and operated via a manual control panel. The combination of liquefaction unit 41 and vaporization unit 44 enables the recycling of liquid nitrogen / liquid oxygen through a return pipe 42 and a gas supply pipe 45. The recovered nitrogen or oxygen is compressed and liquefied before being reused in the vaporization process, significantly reducing energy consumption and minimizing raw material waste.

[0035] In this embodiment, the dispersion unit 22 includes a mounting box 221 fixedly installed inside the first distillation column 211 and the second distillation column 212. A rotating tube 222 is rotatably installed inside the mounting box 221. A dispensing plate 224 is fixedly installed at the bottom end of the rotating tube 222. Several spray heads 225 are fixedly installed at the bottom of the dispensing plate 224. The top of the rotating tube 222 is rotatably connected to the inlet pipe 215 and the delivery pipe 214, respectively. A motor base 2 is fixedly installed on the right side of both the first distillation column 211 and the second distillation column 212. 26, and a drive motor 227 is fixedly installed on the right side of the motor base 226, and a rotating shaft 228 is fixedly installed at the output end of the drive motor 227. One end of the rotating shaft 228 extends through the motor base 226 into the mounting box 221 and is fixedly installed with a small bevel gear 229. A large bevel gear 2210 is fixedly installed on the surface of the rotating tube 222, and the large bevel gear 2210 meshes with the small bevel gear 229. A limit plate 223 is fixedly installed inside the mounting box 221, and the rotating shaft 228 rotates inside the limit plate 223.

[0036] The drive motor 227 is a three-phase asynchronous motor with a self-locking function. It is electrically connected to an external power supply and can be opened and closed via a human-operated control panel. The drive motor 227 drives the rotating shaft 228 to rotate, the rotating shaft 228 drives the small bevel gear 229 to rotate, the small bevel gear 229 drives the rotating tube 222 to rotate, and the rotating tube 222 drives the liquid distribution plate 224 and the spray head 225 to rotate, thereby realizing that the liquid sprayed from the spray head 225 rotates and falls, thus achieving uniform distribution of liquid on the arc plate 61, thereby improving the efficiency of air-liquid distillation.

[0037] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0038] During operation, firstly, air-liquid enters the first distillation column 211 through the liquid inlet pipe 215 and the dispersion unit 22. The liquid oxygen is then vaporized by the second vaporization component 5 and input into the arc-shaped disk 61. It is then evenly distributed inside the arc-shaped disk 61 through the vent holes 63 on the arc-shaped plate 62, thus controlling the surface temperature of the arc-shaped disk 61 at -183 degrees Celsius.

[0039] Secondly, the drive motor 227 drives the rotating shaft 228 to rotate, the rotating shaft 228 drives the small bevel gear 229 to rotate, the small bevel gear 229 drives the rotating tube 222 to rotate, and the rotating tube 222 drives the liquid distribution plate 224 and the spray head 225 to rotate, thereby realizing the rotation and falling of the liquid sprayed by the spray head 225, thus realizing the liquid is evenly distributed on the arc plate 61, the air and liquid boil and the internal oxygen vaporizes, and the oxygen inside the arc plate 61 flows back into the second vaporization component 5 and is compressed into liquid oxygen for recycling;

[0040] Next, the unvaporized air-liquid flows into the lower part of the first distillation column 211 through the water inlet 64. The vacuum pump 31 operates, causing the output pipe 33 to input the unvaporized air-liquid inside the first distillation column 211 into the second distillation column 212 through the input pipe 32. The liquid nitrogen is then vaporized by the vaporizer 44. The vaporized nitrogen is then input into the interior of the arc plate 61 through the gas supply pipe 45. The temperature of the arc plate 61 inside the second distillation column 212 is controlled to drop to minus 196 degrees Celsius, causing the air-liquid to boil and vaporize the nitrogen inside. The vaporized nitrogen is discharged through the exhaust pipe 213 above the second distillation column 212. At the same time, the nitrogen inside the arc plate 61 flows back into the liquefaction machine 41 through the return pipe 42 and is compressed into liquid nitrogen.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air separation distillation column, comprising a base plate (1), characterized in that: A simultaneous distillation mechanism (2) is provided above the base plate (1) to realize the separation and distillation of two gases. The simultaneous distillation mechanism (2) includes: The distillation unit (21) is located above the base plate (1) and includes a first distillation column (211) and a second distillation column (212) fixedly installed on the top of the base plate (1). Both the first distillation column (211) and the second distillation column (212) are equipped with boiling components (6). The right sides of the first distillation column (211) and the second distillation column (212) are respectively equipped with a second vaporization component (5) and a first vaporization component (4). The second vaporization component (5) and the first vaporization component (4) have the same structure. The boiling components (6) are heated to different temperatures by using liquid nitrogen and liquid oxygen vaporization through the second vaporization component (5) and the first vaporization component (4). The air-liquid mixture after distillation in the first distillation column (211) is fed into the second distillation column (212) for distillation through the conveying component (3), thereby achieving simultaneous distillation and separation of nitrogen and oxygen in the air-liquid mixture. The dispersion unit (22) is respectively disposed inside the first distillation column (211) and the second distillation column (212), and is used to achieve uniform dispersion of air and liquid on the boiling component (6).

2. The air separation distillation column according to claim 1, characterized in that: The first distillation column (211) is fixedly equipped with an inlet pipe (215) at its left end, and the second distillation column (212) is fixedly equipped with a delivery pipe (214) at its left end. Both the first distillation column (211) and the second distillation column (212) are fixedly equipped with exhaust pipes (213) at their tops.

3. An air separation distillation column according to claim 1, characterized in that: The boiling component (6) includes an arc disk (61) fixedly installed inside the first distillation column (211) and the second distillation column (212). Several arc plates (62) are fixedly installed inside the arc disk (61). Several vent holes (63) are arranged in a circular array on the arc plates (62), and several water holes (64) are arranged on the edge circumference of the arc disk (61).

4. An air separation distillation column according to claim 2, characterized in that: The delivery assembly (3) includes a vacuum pump (31) fixedly installed on the top of the base plate (1). The output end of the vacuum pump (31) is fixedly installed with an input pipe (32), and one end of the input pipe (32) is fixedly connected to the delivery pipe (214). The input end of the vacuum pump (31) is fixedly installed with an output pipe (33), and one end of the output pipe (33) penetrates the side wall of the first distillation column (211) and extends into the interior of the first distillation column (211).

5. An air separation distillation column according to claim 3, characterized in that: The first vaporization component (4) includes a set of liquefaction machines (41) and vaporization machines (44) fixedly installed on the top of the base plate (1). The input end of the liquefaction machine (41) is fixedly installed with a reflux pipe (42). One end of the reflux pipe (42) passes through the rear wall of the first distillation column (211) and the second distillation column (212) and extends to the bottom rear side of the arc disk (61) and communicates with it. The output end of the liquefaction machine (41) and the input end of the vaporization machine (44) are fixedly connected by a connecting pipe (43). The output end of the vaporization machine (44) is fixedly installed with a gas supply pipe (45). The gas supply pipe (45) passes through the front wall of the first distillation column (211) and the second distillation column (212) and extends to the bottom front side of the arc disk (61) and communicates with it.

6. An air separation distillation column according to claim 2, characterized in that: The dispersion unit (22) includes a mounting box (221) fixedly installed inside the first distillation column (211) and the second distillation column (212). A rotating tube (222) is rotatably installed inside the mounting box (221). A dispensing plate (224) is fixedly installed at the bottom of the rotating tube (222). Several spray heads (225) are fixedly installed at the bottom of the dispensing plate (224). The top of the rotating tube (222) is rotatably connected to the inlet pipe (215) and the delivery pipe (214), respectively. A motor base (22) is fixedly installed on the right side of both the first distillation column (211) and the second distillation column (212). 6), and a drive motor (227) is fixedly installed on the right side of the motor base (226), and a rotating shaft (228) is fixedly installed at the output end of the drive motor (227), and one end of the rotating shaft (228) extends through the motor base (226) to the inside of the mounting box (221) and is fixedly installed with a small bevel gear (229), and a large bevel gear (2210) is fixedly installed on the surface of the rotating tube (222), and the large bevel gear (2210) meshes with the small bevel gear (229), and a limiting plate (223) is fixedly installed inside the mounting box (221), and the rotating shaft (228) rotates inside the limiting plate (223).

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