Fish scale-shaped airflow distribution plate

Abstract

The utility model discloses a fish-scale-shaped air flow distribution plate which comprises an air flow distribution plate body, the air flow distribution plate body is circular, a plurality of fish-scale-shaped air holes are uniformly distributed in the middle of the air flow distribution plate body in an array mode, the fish-scale-shaped air holes are uniformly distributed in a circumferential array mode, and every two adjacent circles of fish-scale-shaped air holes are arranged in a staggered mode. The middle of the airflow distribution plate body is also provided with a plurality of air leakage holes which are uniformly distributed along the circumference, and the airflow distribution plate body is fully provided with fish scale-shaped air holes except the outer edge mounting part and the pressure leakage holes. The fish scale-shaped air holes are uniformly distributed in the circumferential array, so that the air inlet airflow direction is the circumferential direction, rotational flow is easily generated, the air outlet direction and the air outlet quantity are uniform, the material in the material bin is more uniformly influenced by the airflow, the fluidization effect is better, the inner wall of the fluidized bed material bin is not easily and directly impacted, the generated backflow interference is less, and the pressure and energy loss is less; and the fan power and the energy consumption required by the whole set of equipment are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of fluidized bed technology, and in particular to a fish-scale shaped airflow distribution plate. Background Technology

[0002] The fluidized bed's fluidized material chamber has a fish-scale-shaped airflow distribution plate at the connection between the air inlet and the air inlet pipe. This ensures that the airflow entering the fluidized material chamber from the air inlet pipe is evenly distributed within the chamber, thereby creating a uniform suspension and fluidization process for the material. However, the existing fish-scale-shaped air holes 2 on the fish-scale-shaped airflow distribution plate 1' are evenly distributed in a rectangular array (see...). Figure 4 The opening direction of the fish-scale vent 2 is perpendicular to the horizontal or vertical center line of the fish-scale airflow distribution plate body, and the airflow direction from the fish-scale airflow distribution plate 1' is as follows: Figure 4 As indicated by the arrows in the diagram, the airflows are perpendicular to each other and directly impact the inner wall of the fluidized bed, causing backflow. The output airflows also interfere with each other, resulting in pressure loss and increased energy consumption. Furthermore, the fish-scale-shaped airflow distribution plate 1' is constructed from six welded plates, making it difficult to withstand the working pressure of the fluidized bed. During operation, the welded joints of the fish-scale-shaped airflow distribution plate 1' are prone to breakage (see...). Figure 4 The area with the cross-section line is the weld. Utility Model Content

[0003] To address the issues of pressure loss and increased energy consumption caused by the perpendicularity of the fish-scale-shaped air holes to the centerline of the existing fish-scale-shaped airflow distribution plate, and the tendency for welds to break during operation due to the welded joints being welded together from six plates, this invention provides a fish-scale-shaped airflow distribution plate. This plate is a monolithic structure manufactured using stamping or 3D printing, with the fish-scale-shaped air holes evenly distributed in a circular array. This ensures the airflow direction is circumferential, facilitating swirling flow and resulting in uniform airflow direction and volume. The material in the material chamber is more evenly affected by the airflow, leading to better fluidization. Furthermore, it minimizes direct impact on the inner wall of the fluidized bed material chamber, reducing backflow interference and pressure and energy losses, thus significantly reducing the fan power and energy consumption required for the entire system.

[0004] To achieve the above objectives, this utility model provides a fish-scale-shaped airflow distribution plate, including an airflow distribution plate body. The airflow distribution plate body is circular, with a plurality of fish-scale-shaped air holes evenly distributed in the middle. The plurality of fish-scale-shaped air holes are evenly distributed in a circumferential array, and the fish-scale-shaped air holes in every two adjacent circles are staggered. The airflow distribution plate body also has a plurality of vent holes evenly distributed in a circumferential array in the middle. The airflow distribution plate body is covered with fish-scale-shaped air holes outside the outer edge mounting part and the pressure relief hole.

[0005] Furthermore, the pore size of the fish-scale pores is determined by the pore length d1 and the pore width d2, with the pore length d1 set to 0.1-1.5 mm and the pore width d2 set to 0.1-1.5 mm.

[0006] Furthermore, the angle between the opening direction of the fish-scale pores and the horizontal plane is 0°<α≤45°.

[0007] Furthermore, the radial distance X between any two adjacent circles containing fish-scale-shaped pores is equal, and X is set to 0.25–1 mm.

[0008] Furthermore, the spacing Y between any two adjacent fish-scale-shaped pores on the same ring is equal, and Y is set to 1.0–4.0 mm.

[0009] Furthermore, the fish-scale-shaped airflow distribution plate is an integral structure manufactured by stamping or 3D printing.

[0010] Furthermore, the fish-scale-shaped airflow distribution plate is made of 316 stainless steel with a polished outer surface.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. The fish-scale-shaped air holes of this utility model are evenly distributed in a circumferential array, making the airflow direction circumferential, which makes it easier to generate swirling flow. The airflow direction and volume are uniform, and the material in the material bin is more evenly affected by the airflow, resulting in better fluidization. It is also less likely to directly impact the inner wall of the fluidized bed material bin, resulting in less backflow interference, less pressure and energy loss, and greatly reducing the fan power and energy consumption required for the entire set of equipment. 2. This utility model is an integral structure made by stamping or 3D printing. The structure is stable and not easily damaged, which improves the ability to withstand working pressure, greatly extends its service life, and reduces the failure rate in actual production, thereby improving production efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0014] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0015] Figure 3 This is a schematic cross-sectional view of the fish-scale pore structure of an embodiment of the present invention;

[0016] Figure 4 This is a schematic diagram of an existing fish-scale shaped airflow distribution plate structure.

[0017] In the figure: 1. Airflow distribution plate body, 2. Fish scale vents, 3. Outer edge mounting part, 4. Pressure relief hole, 1'. Existing fish scale airflow distribution plate. Detailed Implementation

[0018] 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.

[0019] like Figure 1 As shown, this utility model embodiment is an integral fish-scale shaped airflow distribution plate manufactured by stamping, made of 316 stainless steel with a polished outer surface, and applied to a 60-liter capacity fluidized bed. The fish-scale shaped airflow distribution plate includes an airflow distribution plate body 1, which is circular with an outer diameter D=636mm. Several fish-scale shaped air holes 2 are evenly distributed in the middle, arranged in a circumferential array, and every two adjacent circles of fish-scale shaped air holes 2 are staggered. The airflow distribution plate body 1 also has four circumferentially distributed vent holes 4 in the middle. The airflow distribution plate body 1 is covered with fish-scale shaped air holes 2 except for the outer edge mounting part 3 and the pressure relief holes 4.

[0020] The diameter of the fish-scale pore 2 is determined by the pore length d1 and the pore width d2, with the pore length d1 set to 0.9 mm and the pore width d2 set to 0.17 mm.

[0021] like Figure 3 As shown, the angle α between the opening direction of the fish-scale pore 2 and the horizontal plane is set to 45°.

[0022] like Figure 2 As shown, the radial distance X between any two adjacent circles of fish-scale-shaped air holes 2 is equal, and X is set to 0.75 mm; the hole spacing Y between any two adjacent fish-scale-shaped air holes 2 on the same circle is equal, and Y is set to 1.0 to 4.0 mm. In this embodiment, the hole spacing Y of the 10th circle of fish-scale-shaped air holes starting from the center is 2.4 mm, and the included angle θ between the lines connecting any two adjacent fish-scale-shaped air holes 2 on the 10th circle and the center of the airflow distribution plate body 1 is 0.5°.

[0023] In this embodiment, the fish-scale-shaped airflow distribution plate has an opening ratio of 10%, which is suitable for fluidization operations of materials with a particle size of 150-1000μm.

[0024] In this embodiment, the input airflow becomes the output airflow after being rectified by the fish-scale-shaped airflow distribution plate. Figure 1 The airflow direction (arrow direction in the figure) will generate swirling flow in the fluidized bed material chamber, making it difficult for the output airflow to directly impact the inner side wall of the fluidized material chamber, reducing wind speed loss and pressure loss, and greatly reducing the fan power and energy consumption required for the entire fluidization equipment.

[0025] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A fish-scale shaped airflow distribution plate, comprising an airflow distribution plate body, wherein the airflow distribution plate body is circular, and a plurality of fish-scale shaped air holes are evenly distributed in an array in the middle, characterized in that: Several fish-scale-shaped air holes are evenly distributed in a circular array, and the fish-scale-shaped air holes in each pair of adjacent circles are staggered. The airflow distribution plate body is also provided with multiple vent holes evenly distributed in a circular array in the middle. The airflow distribution plate body is covered with fish-scale-shaped air holes outside the outer edge mounting part and pressure relief hole.

2. The fish-scale shaped airflow distribution plate according to claim 1, characterized in that: The size of the fish-scale pores is determined by the pore length d1 and the pore width d2, where the pore length d1 is set to 0.1 to 1.5 mm and the pore width d2 is set to 0.1 to 1.5 mm.

3. The fish-scale shaped airflow distribution plate according to claim 1, characterized in that: The angle between the opening direction of the fish-scale pores and the horizontal plane is 0°<α≤45°.

4. The fish-scale shaped airflow distribution plate according to claim 1, characterized in that: The radial distance X between any two adjacent circles containing fish-scale-shaped pores is equal, and X is set to 0.25–1 mm.

5. A fish-scale shaped airflow distribution plate according to claim 1, characterized in that: The spacing Y between any two adjacent fish-scale-shaped pores on the same ring is equal, and Y is set to 1.0–4.0 mm.

6. The fish-scale shaped airflow distribution plate according to claim 1, characterized in that: The fish-scale-shaped airflow distribution plate is an integral structure manufactured by stamping or 3D printing.

7. The fish-scale shaped airflow distribution plate according to claim 1, characterized in that: The fish-scale shaped airflow distribution plate is made of 316 stainless steel and has a polished outer surface.

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