Vertical adsorber inlet airflow uniform distribution device

Abstract

The utility model discloses a device for uniformly distributing airflow at an inlet of a vertical adsorber. The device comprises a lower sealing head of the adsorber, the air inlet is formed in the lower end of the adsorber lower sealing head; the elliptical head is arranged at the inner bottom end of the adsorber lower head and completely covers the air inlet; the adsorbent bed is arranged in the vertical adsorber and is positioned right above the lower sealing head of the adsorber; a plurality of uniformly distributed vent holes are formed in the elliptical sealing head in a penetrating manner; the penetrating direction of the vent holes points to the center of the air inlet; the airflow direction through the vent holes located at the outermost periphery points to the outer edge of the adsorbent bed. And no opening is formed around the elliptical head and the adsorber lower head, so that air flow can only be uniformly sprayed to the lower surface of the adsorbent bed from the vent holes, and the covering surface is the same as the bottom surface of the adsorbent bed, so that the impact of the air flow on the adsorbent bed can be reduced, and the utilization rate of the adsorbent can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cryogenic technology, and particularly relates to an inlet air flow distribution device for a vertical adsorber. Background Art

[0002] The existing structure is made of a circular flat plate with small holes evenly drilled on it. Several steel plates or steel pipes are used to support and fix the perforated flat plate above the air inlet to achieve the purpose of evenly distributing the inlet air flow. Disadvantages of this structure: The area of the perforated flat plate is too small, and the periphery below the flat plate is open. Therefore, only a part of the air flow will spray out through the small holes on the perforated flat plate, and the rest of the air flow will directly flow away from the open port below the flat plate. In this way, only part of the air flow is evenly distributed, and the air flow flowing out from the open port is still not evenly distributed enough, so that the impact of the uneven air flow on the adsorbent is very large, and the utilization rate of the adsorbent will also be reduced.

[0003] Chinese patent document with the publication number CN112156615A discloses an air flow distribution device for a pressure swing adsorber, which includes an air inlet section with an air inlet at the top and an air distribution section connected to the bottom of a drainage pipe. An air spoiler is also provided between the air inlet section and the air distribution section. The air spoiler is composed of an outer cylinder, sector-shaped spoiler vanes, and support columns. Among them, the sector-shaped spoiler vanes are evenly distributed in the same direction at a certain angle between the support columns and the outer cylinder. The edge of the outer cylinder is welded and fixed on the inner wall of the air inlet section. It reduces the air flow velocity, makes the air distribution more uniform, reduces the frequency of maintaining the adsorption tower, and improves the efficiency of pressure swing adsorption.

[0004] In the above patent solution, the sector-shaped spoiler vanes are used to make the passing air flow continue to flow forward in a spiral manner. Although it avoids the direct impact of the air flow, but makes the air flow impact in an inclined direction, that is, it does not disperse the air flow. When facing the adsorbent bed, only the impact force is reduced, and there will still be a relatively large local impact force on the part of the adsorbent bed directly opposite to the air inlet, and the uneven gas distribution will result in a low utilization rate of the adsorbent. And it is obviously unrealistic to increase the air inlet so that the impact surface completely covers the adsorbent bed. Summary of the Utility Model

[0005] In order to overcome the technical problem in the prior art that the air flow at the air inlet cannot be evenly distributed on the entire adsorbent bed surface, which will cause a relatively large local impact on the adsorbent bed surface and then lead to a low utilization rate of the adsorbent; an object of the present utility model is to provide an inlet air flow distribution device for a vertical adsorber. By setting an elliptical head at the upper end of the air inlet and evenly arranging a plurality of ventilation holes on the elliptical head, the air flow at the air inlet is evenly distributed on the receiving surface of the entire adsorbent bed after passing through each ventilation hole, reducing the impact of the air flow on the adsorbent and improving the utilization rate of the adsorbent.

[0006] To achieve the above object, the present utility model adopts the following technical solutions: A vertical adsorber inlet air flow distribution device, comprising an adsorber lower head, where the adsorber lower head is the lower part of the vertical adsorber; an air inlet, which is disposed through the central position at the lower end of the adsorber lower head; an elliptical head, which is disposed at the central position of the inner bottom end of the adsorber lower head and completely covers the air inlet, and the elliptical head is a hood-shaped structure with the middle bulging upward; an adsorbent bed, which is disposed in the vertical adsorber and directly above the adsorber lower head; wherein, a plurality of uniformly distributed ventilation holes are disposed through the elliptical head; the penetration direction of the ventilation holes points to the center of the air inlet; the air flow direction of the ventilation holes located at the outermost periphery points to the outer edge of the adsorbent bed.

[0007] After the air flow passing through the air inlet passes through each of the ventilation holes, the air flow diverges and flows towards the adsorbent bed. The air flow directions passing through each of the ventilation holes form an inverted conical structure. Among them, the vertex of the conical structure is located at the center position of the air inlet, and the bottom area of the conical structure is equal to the bottom area of the adsorbent bed. The air flow uniformly flows towards the adsorbent bed, reducing the impact of the air flow on the adsorbent and improving the utilization rate of the adsorbent.

[0008] Furthermore, each of the ventilation holes forms a plurality of concentric rings with gradually increasing diameters; the difference in diameters between two adjacent rings gradually decreases from the inside to the outside.

[0009] The air flow entering the elliptical head, the flow rate through the air inlet is obviously greater than the flow rate of each of the ventilation holes directly opposite to the air inlet. At the same time, with the increase in the flow area, the air flow entering the elliptical head will diverge towards the surroundings. At the same time, the outer ring of the elliptical head has a large flow area and a small flow distance, which will make the air flow in the elliptical head uniformly flow towards the adsorbent bed, and the coverage area is equal to the area of the adsorbent bed.

[0010] Preferably, a connection area is provided on the outer periphery of the elliptical head; the connection area is welded to the inner wall of the elliptical head.

[0011] Furthermore, the horizontal cross-sectional shape of the elliptical head is circular, and the diameter of the largest circle is greater than or equal to three times the diameter of the air inlet.

[0012] Furthermore, the vertical cross-sectional shape of the elliptical head is elliptical, and the major axis of the ellipse is horizontally arranged.

[0013] Furthermore, the elliptical head has multiple models; it is selected and installed according to the size of the air inlet and the air intake volume.

[0014] Specifically, the elliptical head with different diameters is selected according to the intake air volume.

[0015] Specifically, the size of the ventilation holes and the opening ratio on the elliptical head are selected according to the size of the air inlet.

[0016] Compared with the prior art, the beneficial effect of the present utility model is that the elliptical head is directly welded to the lower head of the adsorber, and there is no open opening around it. Therefore, the air flow can only be evenly sprayed from the uniformly distributed ventilation holes on the elliptical head under the adsorbent bed, and the coverage area of each ventilation hole is the same as the bottom area of the adsorbent bed, which can reduce the impact of the air flow on the adsorbent bed and improve the utilization rate of the adsorbent. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the elliptical head of the present utility model.

[0019] In the figure: 1. Lower head of the adsorber; 11. Air inlet; 2. Elliptical head; 21. Air flow direction; 3. Adsorbent bed; 4. Adsorbent. Detailed Embodiments

[0020] Next, in combination with the drawings and specific embodiments, the present utility model will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0021] In the description of the present utility model, it should be noted that for orientation terms, such as the terms "center", "horizontal", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and position relationships indicated are based on the orientation or position relationships shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present utility model.

[0022] In addition, such terms as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise specifically defined.

[0023] In the present utility model, unless otherwise clearly defined and limited, terms such as "arranged", "installed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or connected through an intermediate medium, and can be internally connected and communicated between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] See Figure 1 , a vertical adsorber inlet air flow distribution device, which includes an adsorber lower head 1, and the adsorber lower head 1 is the lower part of the vertical adsorber; an air inlet 11, and the air inlet 11 is arranged through the central position at the lower end of the adsorber lower head 1; an elliptical head 2, and the elliptical head 2 is arranged at the central position of the inner bottom end of the adsorber lower head 1 and completely covers the air inlet 11, and the elliptical head 2 is a hood-shaped structure with the middle protruding upward; an adsorbent bed 3, and the adsorbent bed 3 is arranged in the vertical adsorber and is directly above the adsorber lower head 1; an adsorbent 4 is arranged at the upper end of the adsorbent bed 3.

[0025] See Figure 2 , a plurality of uniformly distributed ventilation holes are arranged through the elliptical head 2; the through direction of the ventilation holes points to the center of the air inlet 11; the air flow direction 21 of the ventilation holes located at the outermost periphery points to the outer edge of the adsorbent bed 3; each of the ventilation holes forms a plurality of rings with gradually increasing diameters, and each of the rings is concentrically arranged; the difference between the diameters of two adjacent rings gradually decreases from the inside to the outside.

[0026] A connection area is arranged on the outer periphery of the elliptical head; the connection area is welded on the inner wall of the elliptical head; the horizontal cross-sectional shape of the elliptical head 2 is circular, and the diameter of the largest circle is greater than or equal to three times the diameter of the air inlet 11; further, the vertical cross-sectional shape of the elliptical head 2 is elliptical, and the major axis of the ellipse is horizontally arranged.

[0027] Determine the size of the elliptical head 2 required according to the size of the air intake of the adsorber. After determining the size of the elliptical head 2, determine the size and opening ratio of the uniformly distributed ventilation holes on the elliptical head 2 according to the size of the air inlet 11, and then determine the opening direction according to the size of the diameter of the adsorbent bed 3 so that the air flow direction can be evenly ejected under the adsorbent bed.

[0028] This design structure is welded above the air inlet of the lower head of the adsorber before installing the support structure of the adsorbent bed. The center lines of the elliptical head 2 and the air inlet 11 coincide. The material of the elliptical head 2 is the same as that of the lower head 1 of the adsorber. The wall thickness of the elliptical head 2 is determined by its diameter, gas volume and pressure.

[0029] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A vertical adsorber inlet air flow distribution device, characterized in that: It includes a lower head of the adsorber, and the lower head of the adsorber is the lower part of the vertical adsorber; An air inlet, and the air inlet is disposed through the center of the lower end of the lower head of the adsorber; An elliptical head, and the elliptical head is disposed at the center of the inner bottom end of the lower head of the adsorber and completely covers the air inlet. The elliptical head is a hood-shaped structure with the middle protruding upward; An adsorbent bed, and the adsorbent bed is disposed in the vertical adsorber and directly above the lower head of the adsorber; Wherein, a plurality of uniformly distributed ventilation holes are disposed through the elliptical head; the penetrating direction of the ventilation holes points to the center of the air inlet; the air flow direction of the ventilation holes located at the outermost periphery points to the outer edge of the adsorbent bed.

2. The air distribution device according to claim 1, wherein: Each of the ventilation holes forms a plurality of concentric rings with gradually increasing diameters, and the diameters of adjacent two rings gradually decrease from the inside to the outside.

3. The air flow distribution device according to claim 1 or 2, characterized in that: A connection area is disposed on the outer periphery of the elliptical head; the connection area is welded to the inner wall of the elliptical head.

4. The air flow distribution device according to claim 1 or 2, characterized in that: The horizontal cross-sectional shape of the elliptical head is circular, and the diameter of the largest circle is greater than or equal to three times the diameter of the air inlet.

5. The air flow distribution device according to claim 1 or 2, characterized in that: The vertical cross-sectional shape of the elliptical head is elliptical, and the major axis of the ellipse is horizontally disposed.

6. The air flow distribution device according to claim 1 or 2, characterized in that: The elliptical head has multiple models; it is selected and installed according to the size of the air inlet and the air intake.

7. The air distribution device according to claim 6, characterized in that: The elliptical head with different diameters is selected according to the size of the air intake.

8. The air flow distribution device according to claim 6, characterized in that: The size of the ventilation holes and the opening ratio on the elliptical head are selected according to the size of the air inlet.

9. The air distribution device according to claim 3, wherein: The horizontal cross-sectional shape of the elliptical head is circular, and the diameter of the largest circle is greater than or equal to three times the diameter of the air inlet.

10. The air distribution device according to claim 3, wherein: The vertical cross-sectional shape of the elliptical head is elliptical, and the major axis of the ellipse is horizontally disposed.

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