Nitrogen making machine adsorption tower with carbon molecular sieve protection structure

Abstract

The utility model discloses a nitrogen making machine adsorption tower with a carbon molecular sieve protection structure, which belongs to the technical field of nitrogen making machine adsorption towers and comprises an adsorption tower body, a gas inlet pipeline is arranged at the bottom end of the adsorption tower body, a nitrogen outlet pipe is arranged at the top end of the adsorption tower body, and an oxygen outlet pipe is arranged in the middle of the adsorption tower body. The gas inlet pipeline, the oxygen outlet pipe and the nitrogen outlet pipe are respectively provided with a control valve. The device further comprises a lower sliding plate, a carbon molecular sieve and a protection structure. According to the adsorption tower, entering air is uniform in the adsorption tower body, the impact on the carbon molecular sieve is reduced, meanwhile, the carbon molecular sieve is pressed by the pressing mechanism, the constant pressure of the carbon molecular sieve is kept, and the carbon molecular sieve is prevented from being greatly abraded during operation, so that the carbon molecular sieve can be stably operated, and the service life of the adsorption tower is prolonged. The effect of reducing pulverization loss caused by mutual abrasion of the carbon molecular sieves is achieved, and reduction of the nitrogen production amount is avoided.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen generator adsorption tower technology, specifically a nitrogen generator adsorption tower with a carbon molecular sieve protective structure. Background Technology

[0002] The working principle of a PSA adsorption tower is based on the selective adsorption characteristics of adsorbents (such as carbon molecular sieves) for different gas molecules. Under high pressure, the adsorbent has a stronger adsorption capacity for certain gases (such as oxygen) and a weaker adsorption capacity for other gases (such as nitrogen). Gas separation is achieved through periodic pressure changes (pressure adsorption and depressurization desorption).

[0003] When a PSA adsorption tower is operating, air is compressed by a compressor and then passes through filters and dryers to remove moisture, oil mist, and impurities, ensuring the air entering the tower is pure. The purified compressed air then enters the adsorption tower containing carbon molecular sieves. Under high pressure, oxygen is adsorbed by the carbon molecular sieves, while nitrogen, due to its weaker adsorption capacity, is enriched and discharged from the tower. A PSA system typically contains two or more adsorption towers that alternately perform the adsorption and desorption processes. While one tower is adsorbing, another tower releases the adsorbed oxygen by depressurization, completing its regeneration.

[0004] However, the existing internal structure of the adsorption tower has certain defects. When compressed air enters the adsorption tower, if the air pressure increases to more than 0.4 MPa, the compressed air shock wave will destroy the stability of the carbon molecular sieve inside the adsorption tower, causing mutual wear between the carbon molecular sieves and resulting in the loss of carbon molecular sieve powder, thereby reducing the nitrogen production.

[0005] Therefore, we propose a nitrogen generator adsorption tower with a carbon molecular sieve protective structure to solve the problems mentioned above.

[0006] The information disclosed above in this background section is only for enhancing the understanding of the background section of this invention, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0007] The purpose of this invention is to provide a nitrogen generator adsorption tower with a carbon molecular sieve protection structure, in order to solve the problem mentioned in the background art that the compressed air shock wave in the existing adsorption tower will destroy the stability of the carbon molecular sieve in the adsorption tower when the air pressure is too high, resulting in mutual wear between the carbon molecular sieves.

[0008] To achieve the above objectives, this utility model provides a nitrogen generator adsorption tower with a carbon molecular sieve protective structure, including an adsorption tower body, an air inlet pipe at the bottom of the adsorption tower body, a nitrogen outlet pipe at the top, and an oxygen outlet pipe in the middle. The air inlet pipe, the oxygen outlet pipe, and the nitrogen outlet pipe are all equipped with control valves. It also includes a lower slide plate, a carbon molecular sieve, and a protective structure.

[0009] The lower slide plate is fixedly installed in the adsorption tower body and located above the oxygen outlet pipe, and the carbon molecular sieve is located above the lower slide plate.

[0010] The protective structure includes a clamping mechanism and a gas rectifier;

[0011] The clamping mechanism is located in the inner cavity of the adsorption tower body and above the carbon molecular sieve, with its bottom end in contact with the carbon molecular sieve. The gas rectifier is located in the inner cavity of the adsorption tower body and below the oxygen outlet pipe.

[0012] Preferably, the adsorption tower body includes a tower body, and an end cap is fixed to the top of the tower body by a first bolt;

[0013] A support is fixedly installed at the bottom of the tower body.

[0014] Preferably, the clamping mechanism includes a mounting bracket and an elastic clamping element;

[0015] The mounting bracket is installed in the inner cavity of the tower body by a third bolt;

[0016] The elastic clamping element is elastically connected to the mounting frame, and its bottom end is in contact with the carbon molecular sieve.

[0017] Preferably, the mounting bracket includes a first retaining ring and a second retaining ring;

[0018] The first fixed ring is fixedly mounted with a first movable rod, the second fixed ring is fixedly mounted with a first fixed rod, and the first fixed rod has a sliding groove.

[0019] A second bolt is fixedly installed on the first movable rod, and the first fixed rod and the first movable rod are fastened together by the second bolt passing through the slide groove;

[0020] The elastic clamping element is elastically connected to the bottom surface of the second fixing ring.

[0021] Preferably, the elastic clamping member includes a pressure plate, a second fixed rod, a second movable rod, and a spring;

[0022] The pressure plate is located on the upper surface of the carbon molecular sieve, and the second fixing rod is fixedly installed on the pressure plate;

[0023] The second movable rod is fixedly installed on the bottom surface of the second fixed ring;

[0024] The bottom end of the second movable rod is inserted into the second fixed rod;

[0025] The spring is sleeved on the second movable rod, and the two ends of the spring are fixed to the second fixed rod and the second fixed ring, respectively.

[0026] Preferably, the pressure plate has pressure bars in the middle and they are distributed at intervals on the pressure plate.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] (1) This utility model improves the stability of the incoming compressed air flow by changing the irregular flow of air into a regular flow of air through a gas rectifier installed in the adsorption tower body, so that the incoming air is more uniform in the adsorption tower body, reducing the impact on the carbon molecular sieve. At the same time, the carbon molecular sieve is pressed by the pressing mechanism to maintain the constant pressure of the carbon molecular sieve, preventing the carbon molecular sieve from experiencing large wear during operation, so that the carbon molecular sieve can maintain stable operation, thereby reducing the mutual wear of carbon molecular sieves and the resulting powder loss, and avoiding the reduction of nitrogen production.

[0029] (2) The mounting bracket of this utility model can be used to adjust the height of the elastic clamping component in the adsorption tower body, so that the maximum compression length of the spring can be adjusted, and the pressure between the clamping mechanism and the carbon molecular sieve can be adjusted after installation.

[0030] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0032] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0033] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle;

[0034] Figure 4 This is a schematic diagram of the pressing mechanism of this utility model;

[0035] Figure 5 This is a schematic diagram of the pressing mechanism in Embodiment 2 of this utility model.

[0036] In the diagram: 1. Adsorption tower body; 2. Inlet pipe; 3. Oxygen outlet pipe; 4. Nitrogen outlet pipe; 5. Lower slide plate; 6. Carbon molecular sieve; 7. Compactor; 8. Gas rectifier; 9. Control valve; 10. Third bolt;

[0037] 11. Tower body; 12. End cap; 13. First bolt; 14. Support frame;

[0038] 71. Mounting bracket; 72. Elastic clamping element;

[0039] 711. First fixing ring; 712. Second fixing ring; 713. First fixing rod; 714. Slide groove; 715. First movable rod; 716. Second bolt;

[0040] 721. Pressure plate; 722. Second fixed rod; 723. Second movable rod; 724. Spring. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. It should be noted that the drawings are schematic and not illustrated to scale. For clarity and convenience, the relative sizes and proportions of the parts shown in the drawings have been exaggerated or reduced in size. Any size is only illustrative and not limiting.

[0042] Please see Figures 1-3 A nitrogen generator adsorption tower with a carbon molecular sieve protective structure includes: an adsorption tower body 1, an inlet pipe 2 at the bottom of the adsorption tower body 1, a nitrogen outlet pipe 4 at the top, and an oxygen outlet pipe 3 in the middle. The inlet pipe 2, the oxygen outlet pipe 3, and the nitrogen outlet pipe 4 are all equipped with control valves 9. The tower also includes a lower slide plate 5, a carbon molecular sieve 6, and a protective structure. The lower slide plate 5 is fixedly installed in the adsorption tower body 1 and is located above the oxygen outlet pipe 3. The carbon molecular sieve 6 is located above the lower slide plate 5. The protective structure includes a pressing mechanism 7 and a gas rectifier 8. The pressing mechanism 7 is located in the inner cavity of the adsorption tower body 1 and is located above the carbon molecular sieve 6, with its bottom end in contact with the carbon molecular sieve 6. The gas rectifier 8 is located in the inner cavity of the adsorption tower body 1 and is located below the oxygen outlet pipe 3.

[0043] By adopting the above technical solution, when compressed air enters the adsorption tower body 1 through the air inlet pipe 2, it first passes through the gas rectifier 8, and then nitrogen passes through the carbon molecular sieve 6 to the top of the carbon molecular sieve 6, while other gases remain in the adsorption tower body 1, located below the carbon molecular sieve 6, thereby achieving separation. During this process, the gas rectifier 8 keeps the incoming airflow stable, and the pressing mechanism 7 applies pressure to the carbon molecular sieve 6, thereby maintaining good stability of the carbon molecular sieve 6 during operation and avoiding mutual wear of the carbon molecular sieves, which would cause powder loss.

[0044] The adsorption tower body 1 includes a tower body 11, with an end cap 12 fixed to the top of the tower body 11 by a first bolt 13; and a bracket 14 fixedly installed at the bottom of the tower body 11.

[0045] Please see Figure 4 The clamping mechanism 7 includes a mounting frame 71 and an elastic clamping member 72; the mounting frame 71 is installed in the inner cavity of the tower body 11 by a third bolt 10; the elastic clamping member 72 is elastically connected to the mounting frame 71 and its bottom end is in contact with the carbon molecular sieve 6.

[0046] Mounting bracket 71 includes a first fixing ring 711 and a second fixing ring 712; a first movable rod 715 is fixedly mounted on the first fixing ring 711, and a first fixing rod 713 is fixedly mounted on the second fixing ring 712, the first fixing rod 713 having a sliding groove 714; a second bolt 716 is fixedly mounted on the first movable rod 715, and the first fixing rod 713 and the first movable rod 715 are fastened by the second bolt 716 passing through the sliding groove 714; an elastic clamping member 72 is elastically connected to the bottom surface of the second fixing ring 712, the elastic clamping member 72 includes a pressure plate 721, The second fixed rod 722, the second movable rod 723, and the spring 724; the pressure plate 721 is located on the upper surface of the carbon molecular sieve 6, and the second fixed rod 722 is fixedly installed on the pressure plate 721; the second movable rod 723 is fixedly installed on the bottom surface of the second fixed ring 712; the bottom end of the second movable rod 723 is inserted into the second fixed rod 722; the spring 724 is sleeved on the second movable rod 723, and the two ends of the spring 724 are respectively fixed to the second fixed rod 722 and the second fixed ring 712; the pressure plate 721 has a pressure rod in the middle, and the rods are distributed at intervals on the pressure plate 721.

[0047] By adopting the above technical solution, during installation, the first fixing ring 711 is first installed on the inner wall of the adsorption tower body 1 by the third bolt 10, and the pressure plate 721 contacts the carbon molecular sieve 6. The second fixing ring 712 is pressed down, causing the second movable rod 723 to retract into the second fixed rod 722, while the first movable rod 715 extends out from the first fixed rod 713. Then the second bolt 716 is tightened.

[0048] Example 2:

[0049] Please see Figure 5 The difference from Example 1 is that, in addition to the pressure bar installed in the middle of the pressure plate 721, it can also be a mesh structure, so that the pressure on the carbon molecular sieve 6 is more uniform.

[0050] Working principle: During operation, when compressed air enters the adsorption tower body 1 through the inlet pipe 2, it first passes through the gas rectifier 8, and then nitrogen passes through the carbon molecular sieve 6 to the top of the carbon molecular sieve 6, while other gases remain in the adsorption tower body 1, located below the carbon molecular sieve 6, thus achieving separation. During this process, the gas rectifier 8 keeps the incoming airflow stable, the pressing mechanism 7 applies pressure to the carbon molecular sieve 6, and the corresponding control valve 9 controls the oxygen to be discharged from the oxygen outlet pipe 3 and the nitrogen to be discharged from the nitrogen outlet pipe 4.

[0051] All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all use conventional models in the prior art, and the circuit connections also use conventional connection methods in the prior art, which will not be detailed here. Any content not described in detail in this specification belongs to the prior art known to those skilled in the art.

[0052] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0057] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A nitrogen generator adsorption tower with a carbon molecular sieve protective structure, comprising an adsorption tower body (1), wherein the bottom end of the adsorption tower body (1) is provided with an inlet pipe (2), the top end is provided with a nitrogen outlet pipe (4), and the middle part is provided with an oxygen outlet pipe (3), wherein the inlet pipe (2), the oxygen outlet pipe (3), and the nitrogen outlet pipe (4) are all provided with control valves (9), characterized in that, It also includes a sliding plate (5), a carbon molecular sieve (6), and a protective structure; The lower slide plate (5) is fixedly installed in the adsorption tower body (1) and located above the oxygen outlet pipe (3). The carbon molecular sieve (6) is located above the lower slide plate (5). The protective structure includes a clamping mechanism (7) and a gas rectifier (8). The pressing mechanism (7) is located in the inner cavity of the adsorption tower body (1) and above the carbon molecular sieve (6), with its bottom end in contact with the carbon molecular sieve (6). The gas rectifier (8) is located in the inner cavity of the adsorption tower body (1) and below the oxygen outlet pipe (3).

2. The nitrogen generator adsorption tower with a carbon molecular sieve protective structure according to claim 1, characterized in that: The adsorption tower body (1) includes a tower body (11), and the top of the tower body (11) is fixed with an end cap (12) by a first bolt (13). A bracket (14) is fixedly installed at the bottom of the tower body (11).

3. The nitrogen generator adsorption tower with a carbon molecular sieve protective structure according to claim 2, characterized in that: The clamping mechanism (7) includes a mounting bracket (71) and an elastic clamping element (72); The mounting bracket (71) is installed in the inner cavity of the tower body (11) by a third bolt (10); The elastic clamping member (72) is elastically connected to the mounting bracket (71), and its bottom end is in contact with the carbon molecular sieve (6).

4. The nitrogen generator adsorption tower with a carbon molecular sieve protective structure according to claim 3, characterized in that: The mounting bracket (71) includes a first retaining ring (711) and a second retaining ring (712); The first fixed ring (711) is fixedly installed with a first movable rod (715), and the second fixed ring (712) is fixedly installed with a first fixed rod (713). The first fixed rod (713) is provided with a sliding groove (714). A second bolt (716) is fixedly installed on the first movable rod (715), and the first fixed rod (713) and the first movable rod (715) are fastened by the second bolt (716) passing through the slide groove (714); The elastic clamping member (72) is elastically connected to the bottom surface of the second fixing ring (712).

5. The nitrogen generator adsorption tower with a carbon molecular sieve protective structure according to claim 4, characterized in that: The elastic clamping member (72) includes a pressure plate (721), a second fixed rod (722), a second movable rod (723), and a spring (724); The pressure plate (721) is located on the upper surface of the carbon molecular sieve (6), and the second fixing rod (722) is fixedly installed on the pressure plate (721); The second movable rod (723) is fixedly installed on the bottom surface of the second fixed ring (712); The bottom end of the second movable rod (723) is inserted into the second fixed rod (722); The spring (724) is sleeved on the second movable rod (723), and the two ends of the spring (724) are fixed to the second fixed rod (722) and the second fixed ring (712) respectively.

6. The nitrogen generator adsorption tower with a carbon molecular sieve protective structure according to claim 5, characterized in that: The pressure plate (721) has pressure rods in the middle, and these rods are distributed at intervals on the pressure plate (721).

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