A high-efficiency nitrogen enrichment device for nitrogen generators

Abstract

This utility model belongs to the technical field of industrial nitrogen generation equipment, and aims to provide a high-efficiency nitrogen enrichment device for nitrogen generators. It includes a nitrogen generator adsorption tower, with an upper end cap at the top. A nitrogen collecting diffuser is located inside the upper end cap, with its lower end connected to an umbrella-shaped nitrogen honeycomb enricher and its upper end connected to an upper end cap flange. The upper end cap flange is bolted to a flange cover plate. A nitrogen outlet pipeline is connected to the side of the upper end cap, with a nitrogen outlet at the top. This utility model features a simple structure, high enrichment efficiency, and long service life of the molecular sieve. By using an umbrella-shaped nitrogen honeycomb enricher inside the adsorption tower, it improves nitrogen enrichment efficiency, ensures the molecular sieve is tightly compressed and will not break, and can be widely used in the production technology of the upper end cap of nitrogen generator adsorption towers.

Description

Technical Field

[0001] This utility model belongs to the technical field of industrial nitrogen production equipment, specifically relating to a high-efficiency nitrogen enrichment device for nitrogen generators. Background Technology

[0002] A pressure swing adsorption (PSA) nitrogen generator is a nitrogen production device that uses air as raw material, molecular sieves as adsorbents, and the principle of pressure swing adsorption to obtain high-purity nitrogen. PSA nitrogen generators are characterized by simple process flow, high degree of automation, rapid gas production, and low energy consumption, and have been widely used in industrial and medical fields.

[0003] Currently, in existing pressure swing adsorption (PSA) nitrogen generators, the adsorption tower needs to be filled with molecular sieves. With the cyclical adsorption and desorption, the gas pressure in the adsorption tower also changes periodically. The adsorption tower is a core component of the nitrogen generator, and its top end cap usually has a gas diffusion structure to facilitate the collection of the prepared nitrogen after diffusion. However, the diffusion structure of the top end cap of existing adsorption towers is often relatively simple, resulting in poor nitrogen collection efficiency. The molecular sieves are prone to failure after a period of use, leading to low nitrogen collection efficiency. Therefore, the structure of the enrichment device at the top of existing nitrogen generator equipment needs further improvement. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a high-efficiency nitrogen enrichment device for nitrogen generators. It features a simple structure, high enrichment efficiency, and long service life of molecular sieves. It adopts an umbrella-shaped nitrogen honeycomb enricher inside the adsorption tower to improve nitrogen enrichment efficiency and ensure that the molecular sieve is compressed and will not break. It can be widely used in the production technology field of the top end cap of the adsorption tower of nitrogen generators.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency nitrogen enrichment device for a nitrogen generator, comprising a nitrogen generator adsorption tower, wherein the top of the nitrogen generator adsorption tower is provided with an adsorption tower upper end cap; a nitrogen collecting diffuser is provided inside the adsorption tower upper end cap, the lower end of the nitrogen collecting diffuser is connected to an umbrella-shaped nitrogen honeycomb enricher, and the upper end is connected to an upper end cap flange, the upper end cap flange being bolted to a flange cover plate; a nitrogen outlet pipeline is connected to the side of the adsorption tower upper end cap, and a nitrogen outlet is provided at the top of the nitrogen outlet pipeline.

[0006] As an improvement, the adsorption tower has an elliptical top end cap, which is connected to the cylinder of the nitrogen generator adsorption tower below.

[0007] As an improvement, the adsorption tower's upper end cap is integrally machined using a CNC machine tool, resulting in excellent airtightness.

[0008] As an improvement, the nitrogen collector diffuser includes an inner collector tube and an outer collector tube, with a hollow air inlet structure formed between the inner and outer collector tubes, and the hollow air inlet structure is connected to the nitrogen outlet pipe.

[0009] As an improvement, the inner tube of the collector is a solid, sealed structure.

[0010] As an improvement, the lower half of the outer tube of the collector is provided with a vent hole, through which nitrogen enters the hollow air intake structure.

[0011] As an improvement, the surface of the nitrogen honeycomb enricher is provided with several evenly distributed round holes and is covered with a stainless steel screen with fine pores.

[0012] As an improvement, the mesh size of the stainless steel screen is 40 to 100 mesh.

[0013] As an improvement, the nitrogen outlet is a circular flange structure.

[0014] The beneficial effects of this utility model are as follows: A high-efficiency nitrogen enrichment device for a nitrogen generator has the characteristics of simple structure, high enrichment efficiency, and convenient molecular sieve replacement. By setting an umbrella-shaped honeycomb enricher inside the adsorption tower upper head, the nitrogen enrichment area is effectively increased, fundamentally solving the problem of uniform and efficient nitrogen enrichment in the adsorption tower, greatly improving the nitrogen production efficiency of molecular sieves and reducing energy consumption. By adopting an adsorption tower upper head that is integrally machined, the overall sealing of the upper head is increased, avoiding nitrogen loss during collection. In addition, by adopting a split bolt-connected flange cover structure, the entire device is more convenient to install and use, and the addition and replacement of molecular sieves are also convenient. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the high-efficiency nitrogen enrichment device for nitrogen generators according to this utility model.

[0016] In the diagram: 1. Nitrogen generator adsorption tower, 2. Adsorption tower upper end cap, 3. Nitrogen collector diffuser, 4. Nitrogen honeycomb enricher, 5. Upper end cap flange, 6. Bolt, 7. Flange cover plate, 8. Nitrogen outlet pipeline, 9. Nitrogen outlet, 10. Inner circular tube of collector, 11. Outer circular tube of collector, 12. Hollow air inlet structure. Detailed Implementation

[0017] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0018] like Figure 1As shown in the figure, a high-efficiency nitrogen enrichment device for a nitrogen generator in this embodiment includes a nitrogen generator adsorption tower 1, the top of which is provided with an adsorption tower upper end cap 2; a nitrogen collection diffuser 3 is provided inside the adsorption tower upper end cap 2, the lower end of which is connected to an umbrella-shaped nitrogen honeycomb enricher 4, and the upper end is connected to an upper end cap flange 5, which is connected to a flange cover plate 7 by bolts 6; a nitrogen outlet pipe 8 is connected to the side of the adsorption tower upper end cap 2, and a nitrogen outlet 9 is provided at the top of the nitrogen outlet pipe 8.

[0019] Furthermore, the upper end cap 2 of the adsorption tower has an elliptical structure and is connected to the cylinder of the nitrogen generator adsorption tower below. Specifically, the upper end cap 2 of the adsorption tower is sealed to the cylinder of the adsorption tower by welding. More specifically, the upper end cap 2 of the adsorption tower is integrally formed by CNC machine tool, so that it has good airtight performance and prevents loss during nitrogen collection.

[0020] Furthermore, the nitrogen collector diffuser 3 includes an inner circular tube 10 and an outer circular tube 11, with a hollow air intake structure 12 formed between the inner and outer circular tubes. The hollow air intake structure 12 is connected to the nitrogen outlet pipe 8. Specifically, the inner circular tube 10 is a solid, sealed structure to prevent nitrogen from leaking from the inner wall. The lower half of the outer circular tube 11 has a permeable hole, through which the collected nitrogen enters the hollow air intake structure 12, then the nitrogen outlet pipe 8, and finally exits from the nitrogen outlet 9.

[0021] Furthermore, the surface of the nitrogen honeycomb enrichment device 4 is provided with several evenly distributed round holes and is covered with a stainless steel screen with fine mesh; specifically, the mesh size of the stainless steel screen is 40~100 mesh, preferably 60~80 mesh, so as to achieve better dispersion and collection.

[0022] Furthermore, the nitrogen outlet 9 is a circular flange structure, which is used to connect the nitrogen outlet to the downstream gas pipeline, making the connection more convenient and providing a better sealing effect.

[0023] This utility model discloses a high-efficiency nitrogen enrichment device for nitrogen generators. The upper head of the nitrogen generator adsorption tower is equipped with an umbrella-shaped honeycomb enricher that increases the nitrogen enrichment area. This fundamentally solves the problem of uniform and efficient nitrogen enrichment in the adsorption tower, greatly improves the nitrogen production efficiency of molecular sieves, reduces energy consumption, and effectively extends the service life of the molecular sieves in the nitrogen generator and makes full use of all the space inside the upper head. It features high efficiency and energy saving, low cost, and a long service life for the nitrogen generator.

[0024] Finally, it should be noted that the above examples are merely specific embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A high-efficiency nitrogen enrichment device for a nitrogen generator, characterized in that, The device includes a nitrogen generator adsorption tower (1), the top of which is provided with an adsorption tower upper end cap (2); the adsorption tower upper end cap (2) is provided with a nitrogen collection diffuser (3) inside, the lower end of which is connected to an umbrella-shaped nitrogen honeycomb enricher (4), and the upper end is connected to an upper end cap flange (5), the upper end cap flange (5) is connected to a flange cover plate (7) by bolts (6); the side of the adsorption tower upper end cap (2) is connected to a nitrogen outlet pipeline (8), and the top of the nitrogen outlet pipeline (8) is provided with a nitrogen outlet (9).

2. The high-efficiency nitrogen enrichment device for a nitrogen generator according to claim 1, characterized in that, The adsorption tower upper end cap (2) has an elliptical structure and is connected to the cylinder of the nitrogen generator adsorption tower (1) below.

3. The high-efficiency nitrogen enrichment device for a nitrogen generator according to claim 2, characterized in that, The adsorption tower upper end cap (2) is formed by CNC machine tool.

4. The high-efficiency nitrogen enrichment device for a nitrogen generator according to claim 1, characterized in that, The nitrogen collector diffuser (3) includes an inner tube (10) and an outer tube (11), and a hollow air intake structure (12) is formed between the inner tube (10) and the outer tube (11). The hollow air intake structure (12) is connected to the nitrogen outlet pipe (8).

5. The high-efficiency nitrogen enrichment device for a nitrogen generator according to claim 4, characterized in that, The inner tube (10) of the collector is a solid sealed structure.

6. The high-efficiency nitrogen enrichment device for a nitrogen generator according to claim 4, characterized in that, The lower half of the outer tube (11) of the collector is provided with a permeable hole, through which nitrogen enters the hollow air intake structure (12).

7. The high-efficiency nitrogen enrichment device for a nitrogen generator according to claim 1, characterized in that, The nitrogen honeycomb enricher (4) has several evenly distributed round holes on its surface and is covered with a stainless steel screen with fine pores.

8. The high-efficiency nitrogen enrichment device for a nitrogen generator according to claim 7, characterized in that, The stainless steel screen has a mesh size of 40 to 100.

9. The high-efficiency nitrogen enrichment device for a nitrogen generator according to claim 1, characterized in that, The nitrogen outlet (9) is a circular flange structure.

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