Adsorption tower for nitrogen preparation

Abstract

The utility model relates to the technical field of nitrogen preparation, in particular to an adsorption tower for nitrogen preparation, which comprises a tower body, a first lower pressing plate mounted in the tower body, a connecting rod movably mounted on the first lower pressing plate and a second lower pressing plate fixedly mounted at the lower end of the connecting rod, a lower pressing ring and an upper pressing ring are fixedly installed on the connecting rod, and the first lower pressing plate is located between the lower pressing ring and the upper pressing ring. According to the utility model, when the molecular sieve below the second lower pressing plate is relatively serious in pulverization, the second lower pressing plate moves downwards, and force is applied to the first lower pressing plate through the connecting rod and the upper pressing ring, so that the compaction effect is better.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen preparation technology, and specifically to an adsorption tower for nitrogen preparation. Background Technology

[0002] When preparing nitrogen through molecular sieve adsorption, an adsorption tower is required. If the molecular sieve is not compacted after being pulverized, the quality of the prepared nitrogen will be reduced.

[0003] Chinese patent application number 202411275655.X discloses a molecular sieve compression structure for a nitrogen generator, including a tower body. The bottom and top sidewalls of the tower body are respectively provided with an air inlet and an exhaust outlet, and the top and bottom sidewalls of the tower body are respectively provided with a feed inlet and a discharge outlet. A base plate is fixedly connected to the inner wall of the bottom of the tower body, and the surface of the base plate has several air holes. Several mounting seats are fixedly connected to the inner wall of the tower body, each mounting seat having several threaded holes, and each threaded hole having a matching bolt threaded into it. A top cover is installed on the top of the tower body, and a mounting frame and a sealing block are fixedly connected to the top and bottom of the top cover, respectively. The top cover has an air outlet, and a compression mechanism is installed on the mounting frame. This invention can fill the entire adsorption tower with molecular sieves in layers, fully compressing each layer of molecular sieves and effectively reducing the mechanical stress generated during compression by the compression mechanism.

[0004] However, the Chinese patent with application number 202411275655.X applies force through a cylinder. Due to the height of the tower, the piston rod is also quite long, making it difficult to apply force.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of this invention is to provide an adsorption tower for nitrogen preparation that can effectively solve the above-mentioned technical problems.

[0007] To achieve the purpose of this utility model, the following technical solution is adopted:

[0008] An adsorption tower for nitrogen preparation includes: a tower body, a first lower pressure plate installed inside the tower body, a connecting rod movably installed on the first lower pressure plate, and a second lower pressure plate fixedly installed at the lower end of the connecting rod.

[0009] A lower pressure ring and an upper pressure ring are fixedly installed on the connecting rod, and the first lower pressure plate is located between the lower pressure ring and the upper pressure ring.

[0010] Furthermore: the tower body includes a cylindrical body, an upper end cap and a lower end cap, a lower connecting pipe is connected to the lower end cap, a lower sealing plate is detachably installed on the lower connecting pipe, and a lower air inlet pipe is connected to the lower connecting pipe.

[0011] Furthermore: an exhaust pipe is fixedly connected to the upper end of the lower connecting pipe, and a fixing plate is connected to the upper end of the exhaust pipe. Exhaust holes are provided on the exhaust pipe and the fixing plate.

[0012] Furthermore: a support mesh plate is fixedly installed inside the cylinder, and a sealing ring is fixedly connected to the lower surface edge of the support mesh plate.

[0013] Furthermore: an upper connecting pipe is fixedly connected to the upper end cap, an upper sealing plate is detachably installed on the upper connecting pipe, and an upper air inlet pipe is connected to the upper connecting pipe.

[0014] Furthermore, a support ring is fixedly connected inside the upper connecting pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In this invention, an adsorption tower for nitrogen preparation allows the second lower pressure plate to move downwards when the molecular sieve below the second lower pressure plate is severely pulverized. This movement, via a connecting rod and an upper pressure ring, applies force to the first lower pressure plate, resulting in better compaction. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] Figure 1 This is a schematic diagram of the adsorption tower for nitrogen preparation according to this invention.

[0019] Figure 2 This is a cross-sectional view of the adsorption tower for nitrogen preparation according to this invention.

[0020] Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle.

[0021] Figure 4 for Figure 2 Enlarged schematic diagram of part B.

[0022] In the diagram: 1. Tower body; 2. First lower pressure plate; 3. Connecting rod; 4. Second lower pressure plate; 5. Upper pressure ring; 6. Lower pressure ring; 7. Exhaust pipe; 8. Fixing plate; 9. Support mesh plate; 10. Sealing ring; 101. Support ring; 11. Cylinder body; 12. Upper end cap; 13. Lower end cap; 14. Lower connecting pipe; 15. Lower sealing plate; 16. Lower air inlet pipe; 17. Upper connecting pipe; 18. Upper sealing plate; 19. Upper air inlet pipe. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] In the description of this utility model, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0025] like Figures 1 to 4 As shown, the adsorption tower for nitrogen preparation of this utility model includes: a tower body 1, a first lower pressure plate 2 installed inside the tower body 1, a connecting rod 3 movably installed on the first lower pressure plate 2, and a second lower pressure plate 4 fixedly installed at the lower end of the connecting rod 3.

[0026] The tower body 1 includes a cylinder 11, an upper end cap 12, and a lower end cap 13. A lower connecting pipe 14 is connected to the lower end cap 13, and a lower sealing plate 15 is detachably installed on the lower connecting pipe 14. A lower air inlet pipe 16 is connected to the lower connecting pipe 14. An upper connecting pipe 17 is fixedly connected to the upper end cap 12, and an upper sealing plate 18 is detachably installed on the upper connecting pipe 17. An upper air inlet pipe 19 is connected to the upper connecting pipe 17.

[0027] It is important to explain in detail here that during the PSA oxygen absorption and nitrogen production process, two adsorption towers are connected. When producing nitrogen, pretreated air enters the cylinder 11 through the lower inlet pipe 16. After the molecular sieve adsorbs oxygen, it is discharged from the upper inlet pipe 19. When the molecular sieve is reduced, gas enters from the upper inlet pipe 19, backflushes the molecular sieve, and then is discharged from the lower inlet pipe 16. Through the intermittent production of the two adsorption towers, nitrogen can be continuously generated.

[0028] In this application, the inner diameter of the tower body 1 is 2.1 meters; the diameter of the connecting rod 3 is 0.09 meters, and a 0.091 through hole is opened on the first lower pressure plate 2, through which the connecting rod 3 passes.

[0029] The first lower pressure plate 2 and the second lower pressure plate 4 are provided with air vents. The diameter of the air vents is related to the particle size of the molecular sieve. Generally, the diameter of the air vents can be smaller than the particle size of the molecular sieve. After passing through the molecular sieve, the gas can pass through the air vents.

[0030] An upper pressure ring 5 and a lower pressure ring 6 are fixedly installed on the connecting rod 3, and the first lower pressure plate 2 is located between the lower pressure ring 6 and the upper pressure ring 5. This application provides two pressure plates, which can effectively compact the molecular sieve. That is, when the molecular sieve below the second lower pressure plate 4 is severely pulverized, the second lower pressure plate 4 moves downward, and the connecting rod 3 and the upper pressure ring 5 apply force to the first lower pressure plate 2, so that the compaction effect is better.

[0031] In this application, the diameters of the lower pressure ring 6 and the upper pressure ring 5 are both 0.1 meters.

[0032] It should be explained here that the pulverization of molecular sieves is generally caused by excessive airflow blowing directly onto the molecular sieve. Another reason is that the airflow blows towards the inner wall of the cylinder 11. Since there may be a contact gap between the molecular sieve and the inner wall of the cylinder 11, the molecular sieve at this location is prone to pulverization.

[0033] As a further improvement of this utility model: an exhaust pipe 7 is fixedly connected to the upper end of the lower connecting pipe 14, and a fixing plate 8 is connected to the upper end of the exhaust pipe 7. Exhaust holes are opened on the exhaust pipe 7 and the fixing plate 8. The inner diameter of the lower connecting pipe 14 is larger than the inner diameter of the lower air intake pipe 16, so that when air enters the lower connecting pipe 14 from the lower air intake pipe 16, it can play a role in depressurization. The inner diameter of the lower connecting pipe 14 is 2 to 4 times the inner diameter of the lower air intake pipe 16.

[0034] It should also be noted that the exhaust pipe 7 and the fixing plate 8 form a cap-like structure. When some air is blown onto the fixing plate 8, it can flow in all directions, thereby playing a role in buffering and depressurization. By relieving pressure through multiple means, the pulverization effect of the molecular sieve can be relatively reduced.

[0035] As a further improvement of this utility model: a support mesh plate 9 is fixedly installed inside the cylinder 11, and the molecular sieve is placed on the support mesh plate 9. As prior art, this application will not elaborate further. A sealing ring 10 is fixedly connected to the lower surface edge of the support mesh plate 9. The sealing range of the sealing ring 10 is set as needed. For reference, the width of the sealing ring 10 in this application is 5 cm.

[0036] By setting a sealing ring 10, air can be prevented from blowing directly into the contact gap between the molecular sieve and the inner wall of the cylinder 11, thereby slowing down the pulverization of the molecular sieve.

[0037] In other words, this application aims to minimize the pulverization of molecular sieves, while also ensuring that even if the molecular sieves are pulverized, the first lower pressure plate 2 and the second lower pressure plate 4 can apply a downward force to the molecular sieves, making the molecular sieves more tightly bonded.

[0038] In this application, the first lower pressure plate 2 and the second lower pressure plate 4 can be removed upwards as a whole by means of the lower pressure ring 6 and the upper pressure ring 5. The first lower pressure plate 2 and the second lower pressure plate 4 are composed of multiple plates connected by bolts.

[0039] The upper connecting pipe 17 is fixedly connected to a support ring 101. The support ring 101 can serve as a reinforcement and can also be used to install a filter mechanism.

[0040] In this application, three support legs are installed on the outer wall of the cylinder 11, which can play a role in providing stable support.

[0041] Working principle:

[0042] When the molecular sieve below the second lower pressure plate 4 is severely pulverized, the second lower pressure plate 4 moves downward and applies force to the first lower pressure plate 2 through the connecting rod 3 and the upper pressure ring 5, so that the compaction effect is better.

[0043] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0044] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A kind of nitrogen gas preparation with adsorption tower, it is characterized by: Include: Tower body, the first lower pressing plate installed in the tower body, the connecting rod movably installed on the first lower pressing plate and the second lower pressing plate fixedly installed on the lower end of the connecting rod; The connecting rod is fixedly installed with a lower pressing ring and an upper pressing ring, and the first lower pressing plate is between the lower pressing ring and the upper pressing ring.

2. The adsorption column for producing nitrogen gas according to claim 1, wherein: The tower body comprises a cylinder, an upper head and a lower head, the lower head is connected with a lower communication pipe, the lower communication pipe is detachably installed with a lower sealing plate, and the lower communication pipe is connected with a lower gas inlet pipe.

3. The adsorption column for producing nitrogen gas according to claim 2, wherein: The upper end of the exhaust pipe is connected with a fixed plate, and the exhaust pipe, the fixed plate are provided with exhaust holes.

4. The adsorption column for producing nitrogen gas according to claim 3, wherein: The inside of the cylinder is fixedly installed with a support net plate, and the lower surface edge of the support net plate is fixedly connected with a sealing ring.

5. The adsorption column for producing nitrogen gas according to claim 2, wherein: The upper head is fixedly connected with an upper communication pipe, the upper communication pipe is detachably installed with an upper sealing plate, and the upper communication pipe is connected with an upper gas inlet pipe.

6. The adsorption column for producing nitrogen gas according to claim 5, wherein: The inside of the upper communication pipe is fixedly connected with a support ring.

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