Multi-layer silk screen composite sintering distribution plate for fluidized bed

Abstract

The utility model relates to the field of fluidized beds, in particular to a multi-layer silk screen composite sintering distribution plate for a fluidized bed. The technical problems are as follows: in the fluidized bed process, dead angles are easy to generate in places without air holes, distribution plates manufactured by partial processes only can solve the problem that gas vertically passes through the distribution plates, but the aperture ratio is low, the boiling difficulty is easy to cause, and the discharged materials are not clean; the technical scheme of the utility model is as follows: the multi-layer silk screen composite sintering distribution plate for the fluidized bed comprises a distribution plate body, the distribution plate comprises a distribution plate body and further comprises holes and silk screens, the holes are formed in the distribution plate body in a central symmetry mode, the silk screens are arranged on the upper layer of the distribution plate body, and the distribution plate body is composed of multiple layers of bottom plates and the silk screens. The multiple layers of bottom plates are concentrically rotated or translated in different areas, so that the axis connecting line of any through air hole of the composite distribution plate is inclined to the axis of the distribution plate body; the multiple layers of bottom plates are sintered together with the multiple layers of silk screens after concentric rotation or partition translation.

Description

Technical Field

[0001] The utility model relates to the field of fluidized beds, in particular to a multi-layer wire mesh composite sintered distributor plate for a fluidized bed. Background Art

[0002] In the powder drying production of industries such as pharmaceuticals, food, and chemicals, the fluidized bed is the core equipment of the drying process, and its structure determines the fluidization state and performance of the material; as the core component of the fluidized bed, the rationality of the structure of the distributor plate affects the fluidization degree of the heat-carrying gas flow in the fluidized bed to agitate the material to the boiling fluidization state; the heat-carrying gas flow and the wet material complete the mass and heat exchange under negative pressure to achieve the purpose of quickly drying the wet particles. At present, most of the existing fluidization plates can only make the gas jet vertically along the axis of the air holes of the distributor plate, while some material drying processes require the gas to jet in the required direction. For example, the Chinese utility model patent with the publication number CN209877488U discloses "a distributor plate for a fluidized bed and a fluidized bed", which although solves the problem of the gas jetting vertically through the distribution plate in principle, there are problems such as long processing cycle, high difficulty, high price, and no promotion value through the existing processing technology; and the hole opening rate is extremely low, resulting in difficult material boiling; its hole opening width is 0.2 - 0.4 mm, and it cannot intercept fine materials with a particle diameter less than 0.2 mm. Summary of the Utility Model

[0003] In order to overcome the problems that in the process of fluidization, dead corners are likely to occur where there are no air holes due to the gas passing vertically through the distributor plate, the hole opening rate is low, the boiling is difficult, the discharging is not clean, and some processing technologies have long processing cycles, high difficulty, high price, and no promotion value; and at present, there is an urgent need for a multi-layer wire mesh composite sintered distributor plate for a fluidized bed that can make the gas jet in the tangential direction required by the material drying process and play a certain role in intercepting the material.

[0004] The technical solution of the utility model is: a multi-layer wire mesh composite sintered distributor plate for a fluidized bed, including a distributor plate body; it also includes openings and wire meshes. A number of openings are symmetrically arranged at the center inside the distributor plate body, and a number of layers of wire meshes are arranged on the upper layer of the distributor plate body. The distributor plate body is composed of multiple layers of bottom plates and a number of layers of wire meshes. The multiple layers of bottom plates are inclined so that the axis connection of any through-hole of the composite distributor plate is inclined with respect to the axis of the distributor plate body through concentric rotation or zonal translation; after the multiple layers of bottom plates are concentrically rotated or zonally translated, they are sintered together with a number of layers of wire meshes.

[0005] Preferably, through the setting of gradually transitioning the included angles of multiple layers of orifice plates, the direction of the airflow can be changed after passing through the distribution plate, and the airflow enters the material bin in an inclined spiral rotation, causing the material to rotate and boil sufficiently; through the settings of the opening size, spacing, and area, the opening rate of the distribution plate can be greatly increased to achieve the full utilization of the distribution plate; through the setting of sintering the upper covering wire mesh, the interception accuracy can be quickly adjusted according to the requirements of the drying process, and the selection of the wire mesh is convenient.

[0006] Preferably, the openings are arranged concentrically or in a plum blossom shape on each layer of the bottom plate in the distribution plate body. After the multi-layer wire mesh composite sintered distribution plate is sintered and processed, during use, the hot air blown in from the bottom bin of the fluidized bed will be ejected along the connection line of the central axis points of the through holes, which is more conducive to the upward rotation and boiling of the material.

[0007] Preferably, the included angle between the connection line of the central axis points of the through holes of the composite distribution plate and the axis of the distribution plate body is inclined at 20-70 degrees by concentric rotation or partition translation of the multi-layer bottom plates.

[0008] Preferably, the openings on the distribution plate body are inclined from bottom to top. When designing the multi-layer wire mesh composite sintered distribution plate, it is required to calculate the appropriate hole diameter, hole pitch, and single-layer bottom plate thickness based on the opening rate and the axis included angle.

[0009] Preferably, the upper covering wire mesh layer is composed of one or more layers, and the wire mesh interception accuracy range is 1-2000 μm. During the use of the multi-layer wire mesh composite sintered distribution plate, since the openings are relatively dense, in this embodiment, the composite sintering method of the wire mesh and the multi-layer bottom plates can simultaneously take into account a relatively high opening rate and a relatively high interception accuracy, so as to ensure a sufficient air intake volume and the airflow is ejected in the direction required by the process.

[0010] Preferably, the openings of each layer of the bottom plate in the distribution plate can be designed to start arranging from a certain distance from the axis of the distribution plate body, forming a circular surface with this distance as the radius on the distribution plate body, and a conical column or other shaped parts required by the process requirements can be detachably connected on the circular surface.

[0011] Preferably, the opening density and shape of each layer of the bottom plate in the distribution plate body can be adjusted according to the process requirements, for example, making the density consistent, increasing from small to large or decreasing from large to small.

[0012] 1. In the embodiment of the present invention, through the setting of gradually transitioning multiple layers of orifice plates, the direction of the airflow can be changed after passing through the distribution plate, and the airflow enters the material bin in an inclined spiral rotation, causing the material to rotate and boil sufficiently; through the settings of the opening size, spacing, and area, the opening rate of the distribution plate can be greatly increased to achieve the full utilization of the distribution plate without dead angles; through the setting of sintering the upper covering wire mesh, the interception accuracy can be quickly adjusted according to the requirements of the drying process, and the selection of the wire mesh is convenient;

[0013] 2. In the embodiments of the present utility model, the accuracy and weaving method of the upper covering wire mesh can be quickly adjusted according to the material characteristics without affecting the air outlet angle. Due to the interception effect of the wire mesh, the leakage of materials with a particle diameter larger than the wire mesh accuracy can be completely avoided; since the apertures are relatively dense, the composite sintering method of the wire mesh and the multi-layer bottom plate can take into account both a relatively high aperture ratio and a relatively high interception accuracy, thereby ensuring a sufficiently large air intake and the airflow being ejected in the direction required by the process;

[0014] 3. In the embodiments of the present utility model, an unperforated area, i.e., a circular surface, can be set at a certain distance from the axis of the distribution plate body, and other unperforated area positions can also be selected according to process requirements, leaving an installation position for connecting conical, cylindrical and other shaped parts, so that the hot air blown into from the bottom bin of the fluidized bed will rotate upward along conical, cylindrical and other shaped parts, which is more conducive to material boiling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a schematic top view structure diagram of the multi-layer wire mesh composite sintering distribution plate for a fluidized bed of the present utility model;

[0016] Figure 2 Shown is a schematic sectional three-dimensional structure diagram of the multi-layer wire mesh composite sintering distribution plate for a fluidized bed of the present utility model;

[0017] Figure 3 Shown is the multi-layer wire mesh composite sintering distribution plate for a fluidized bed of the present utility model Figure 1 in a schematic diagram of the local structure of A;

[0018] Figure 4 Shown is a schematic diagram of the local structure of the wire mesh of the multi-layer wire mesh composite sintering distribution plate for a fluidized bed of the present utility model;

[0019] Figure 5 Shown is the multi-layer wire mesh composite sintering distribution plate for a fluidized bed of the present utility model Figure 2 in a schematic diagram of the local structure of B.

[0020] Description of the reference numerals: 1. Distribution plate body; 2. Aperture; 3. Wire mesh. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present utility model will be further described below with reference to the drawings and embodiments.

[0022] Please refer to Figure 1-2, the present utility model provides an embodiment: a multi-layer wire mesh composite sintered distributor plate for a fluidized bed, including a distributor plate body 1; further including openings 2 and wire meshes 3. A plurality of openings 2 are symmetrically arranged at the center inside the distributor plate body 1. A plurality of layers of wire meshes 3 are arranged on the upper layer of the distributor plate body 1. The distributor plate body 1 is composed of multiple layers of bottom plates and a plurality of layers of wire meshes 3. The multiple layers of bottom plates are concentrically rotated or partitioned and translated so that the axis connection line of any through-hole of the composite distributor plate is inclined with respect to the axis of the distributor plate body 1; the multiple layers of bottom plates are sintered together with a plurality of layers of wire meshes 3 after concentric rotation or partitioned translation; the openings 2 are arranged concentrically or in a plum blossom shape on a single-layer bottom plate in the distributor plate body 1; the axis included angle between the axis connection line of the through-hole center points of the composite distributor plate and the axis of the distributor plate body 1 after the multiple layers of bottom plates are concentrically rotated or partitioned and translated is 20 - 70 degrees; the openings 2 are inclined upward from bottom to top on the distributor plate body 1. The accuracy and weaving method of the upper-covering wire mesh 3 can be quickly adjusted according to the material characteristics without affecting the air outlet angle. Due to the interception effect of the wire mesh 3, it can completely avoid the leakage of materials with a particle diameter larger than the accuracy of the wire mesh 3; since the openings 2 are relatively dense, in this embodiment, the composite sintering method of the wire mesh 3 and the multiple layers of bottom plates can simultaneously take into account a relatively high opening ratio and a relatively high interception accuracy, so as to ensure a sufficiently large air intake volume and the air flow is ejected in the direction required by the process.

[0023] Please refer to Figure 3-4 , in this embodiment, the upper-covering wire mesh 3 is composed of one or more layers, and the interception accuracy range of the wire mesh 3 is 1 - 2000 μm; the opening density and shape of each layer of bottom plate in the distributor plate body 1 can be adjusted according to process requirements, for example, the density can be made consistent, or changed from small to large or from large to small.

[0024] When working, select a wire mesh 3 with a suitable mesh number as the interception control layer according to the interception requirements; calculate the appropriate hole diameter, hole pitch and the thickness of a single-layer bottom plate according to the included angle of the openings 2 where the axis connection line of the through-holes of the bottom plate is inclined with respect to the axis of the distributor plate body 1 and the opening 2 ratio requirements. The bottom plate is processed by punching, laser, drilling and other processing methods. The shape of a single hole includes but is not limited to round holes, square holes, rectangular holes, etc.; use a suitable fixture to ensure that the hole plate is placed orderly at the required angle; spot-weld the multiple layers of bottom plates and the upper-covering wire mesh 3 firmly; put the completed semi-finished product into a vacuum sintering furnace for sintering; cut and clean the sintered semi-finished product; roll and level the cleaned semi-finished product; laser-cut the leveled semi-finished product and then clean it; dry and package the cleaned finished product.

[0025] Through the above steps, the layered transition setting of the multi-layer hole plate can change the direction of the air flow after passing through the distributor plate, and the air flow spirally rotates obliquely into the material bin, making the material fully rotate and boil; through the setting of sintering the upper-covering wire mesh 3, the interception accuracy can be quickly adjusted, and the selection of the wire mesh 3 is convenient.

[0026] In this specification, specific examples are used to illustrate the principles and implementation manners of the present invention. The description of the above embodiments is only to help understand the method and core idea of the present invention, and is not intended to limit the present invention. At the same time, for those of ordinary skill in the art, any modifications, equivalent replacements, improvements, etc. made according to the idea and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-layer wire mesh composite sintering distribution plate for a fluidized bed, comprising a distribution plate body (1); characterized in that: The invention also comprises openings (2) and a wire mesh (3). The distribution plate body (1) is provided with a plurality of openings (2) symmetrically arranged at the center thereof. The upper layer of the distribution plate body (1) is provided with a plurality of layers of wire mesh (3). The distribution plate body (1) is composed of a multi-layer bottom plate and a plurality of layers of wire mesh (3). The multi-layer bottom plate is provided with a plurality of layers of wire mesh (3) so that the axis connecting any axis passing through the air holes of the composite distribution plate and the axis of the distribution plate body (1) are arranged in an inclined manner through concentric rotation or partitioned translation. The multi-layer bottom plate is sintered together with the plurality of layers of wire mesh (3) through concentric rotation or partitioned translation.

2. The multi-layer wire mesh composite sintering distribution plate for a fluidized bed according to claim 1, characterized in that: The openings (2) are arranged in a concentric or plum blossom shape on the single-layer bottom plate in the distribution plate body (1).

3. The multi-layer wire mesh composite sintering distribution plate for a fluidized bed according to claim 2, characterized in that: The multi-layer bottom plate is rotated concentrically or translated in sections so that the axis line connecting the axis points of the composite distribution plate penetrating the pores and the axis of the distribution plate body (1) are inclined at an angle of 20-70 degrees.

4. The multi-layer wire mesh composite sintering distribution plate for a fluidized bed according to claim 3, characterized in that: The openings (2) are inclined from bottom to top on the distribution plate body (1).

5. The multi-layer wire mesh composite sintering distribution plate for a fluidized bed according to claim 1, characterized in that: The upper wire mesh (3) layer is composed of one or more layers, and the interception accuracy of the wire mesh (3) ranges from 1 to 2000 μm.

Images