Vertical boiling bed, one-step granulator and material pot air inlet mechanism

Abstract

The utility model relates to the technical field of granulation, in particular to a vertical boiling bed, a one-step granulator and a material pot air inlet mechanism. The material pot air inlet mechanism comprises a vertical air duct used for being connected with a material pot, the wind resistance rotating disc is arranged in the vertical air duct and located on the lower side of the bottom of the material pot, so that inlet air passes through the wind resistance rotating disc and then enters the material pot through the bottom of the material pot, and at least two areas with different wind resistance are distributed on the wind resistance rotating disc in the circumferential direction. The rotating shaft is connected with the wind resistance turntable to drive the wind resistance turntable to rotate relative to the vertical air duct and the bottom of the material pot. In the rotating process of the wind resistance rotating disc, boiling areas of different degrees of materials in the material pot continuously change along with the wind resistance rotating disc, hardening and bed collapse can be prevented, meanwhile, light fine powder in the materials is prevented from being blown to a filter to form adhesion, and the problem that the content and the powder mixing uniformity are damaged after the fine powder is separated from the materials is solved. In addition, the air speed is reduced, the material moisture absorption time of hot air is prolonged, the efficiency of taking away moisture / solvent by hot air is improved, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of granulation, in particular to a vertical fluidized bed, a one-step granulator and an air inlet mechanism for a material pot. Background Art

[0002] The air inlet channels of existing vertical fluidized bed or one-step granulator are generally fixed structure air ducts, usually straight-through type, guide cone type, guide plate type. Since the horizontal air inlet and the vertical boiling direction differ by 90°, the airflow will form eddies and turbulence in the equipment, as well as the problem of uneven local airflow velocity. As a result, the fixed structure air duct has the following insurmountable defects: it is impossible to achieve the balance of wind pressure and air flow at the bottom of the material pot flowing through the fluidized bed or one-step granulator, and the part with low air flow cannot make the material boil or meet the required state change, which easily causes the material to collapse and agglomerate. In order to prevent the material from collapsing, one of the existing technologies solves the problem by increasing the wind pressure and increasing the air volume, but this method will cause the wind speed in the diffusion section to be too high, which will cause the fine powder in a part of the area to be blown onto the filter, resulting in a decrease in the content of the lighter components in the mixed material, destroying the quality defect of the material content ratio (this problem is particularly serious for the one-step granulator), and this method is more difficult to debug. In addition, the increase in wind speed makes the saturated water absorption capacity of hot air not fully utilized, resulting in low energy efficiency. The above problems directly affect the finished product qualification rate and energy consumption of material drying. For the one-step granulator, it will also cause large deviations in particle diameter and uneven content of active ingredients. Utility Model Content

[0003] The utility model aims to provide an air inlet mechanism for a material pot, which is used for a vertical fluidized bed or a one-step granulator, and solves at least one problem existing in the background technology.

[0004] In order to achieve the above-mentioned purpose, in the first aspect, the material pot air inlet mechanism comprises a vertical air duct connected to the material pot, the side wall of the vertical air duct is provided with an air inlet, the material pot air inlet mechanism also comprises a wind resistance turntable and a rotating shaft, the wind resistance turntable is arranged in the vertical air duct and is located at the lower side of the bottom of the material pot, so that the incoming air passes through the wind resistance turntable and then enters the material pot through the bottom of the material pot, one end of the rotating shaft is connected to the wind resistance turntable, and the other end is used to be connected to the driving device;

[0005] At least two areas with different wind resistances are distributed on the wind resistance turntable along the circumferential direction. When the rotating shaft rotates, it can drive the wind resistance turntable to rotate relative to the vertical air duct and the bottom of the material pot.

[0006] Optionally, three areas with different wind resistances are distributed on the wind resistance rotating disk along the circumferential direction, and the number of each area with different wind resistances is one or more.

[0007] Optionally, each area with different wind resistance can be achieved by setting different opening ratios in the respective area.

[0008] Optionally, a radial gap is provided between the outer peripheral side of the wind resistance rotating disk and the side wall of the vertical air duct.

[0009] Optionally, in the same time period, the air intake of the radial gap is not greater than 20% of the air intake of the wind resistance rotary disk.

[0010] Optionally, an L-shaped notch is provided on the side wall of the vertical air duct along the circumferential direction, and the wind resistance rotating disk extends into the L-shaped notch, and an L-shaped gap is formed between the wind resistance rotating disk and the wall of the L-shaped notch.

[0011] Optionally, the L-shaped gap is as small as possible under the condition that the wind resistance rotating disk can rotate relative to the vertical air duct.

[0012] Optionally, there is an axial gap between the wind resistance turntable and the bottom of the material pot.

[0013] Optionally, the axial clearance is as small as possible, provided that the wind resistance turntable can rotate relative to the bottom of the material pot.

[0014] Optionally, each area with different wind resistance is configured to be fan-shaped.

[0015] Optionally, the bottom of the material pot is a perforated plate structure or a screen structure.

[0016] Optionally, the vertical air duct includes an air inlet section, the air inlet is arranged on the side wall of the air inlet section, the air inlet section is connected to the material pot, and the wind resistance turntable is arranged inside the air inlet section.

[0017] Optionally, the upper end of the air inlet section is butted against the material pot, and an annular sealing airbag or a sealing ring is provided on the butt surface between the two.

[0018] Optionally, the vertical air duct includes an air inlet section and a connecting section, the air inlet section is connected to the material pot through the connecting section, and the wind resistance turntable is arranged in the connecting section.

[0019] Optionally, the upper end of the connecting section is butted against the material pot, an annular sealing airbag or a sealing ring is provided on the butt surface of the two, and the connecting section is firmly connected to the air inlet section; or

[0020] The connecting section is tightly connected to the material pot, the lower end of the connecting section is butted against the upper end of the air inlet section, and an annular sealing airbag or a sealing ring is provided on the butt surface between the connecting section and the air inlet section.

[0021] Optionally, the vertical air duct includes a material pot extension section and an air inlet section, the material pot extension section is formed by the material pot extending downward as a whole, the air inlet section is connected to the material pot extension section, and the wind resistance turntable is arranged in the material pot extension section.

[0022] Optionally, the upper end of the air inlet section is butted against the material pot extension section, and an annular sealing airbag or a sealing ring is provided on the butt surface between the two.

[0023] Optionally, the rotating shaft is located at the lower side of the wind resistance rotating disk, one end of which is connected to the wind resistance rotating disk, and the other end of which is located in the vertical air duct or extends out of the vertical air duct for connection with the driving device.

[0024] Based on the implementation method in which the rotating shaft is located at the lower side of the wind resistance turntable, preferably, a plurality of support members are also provided in the vertical air duct, one end of the plurality of support members is connected to the bearing sleeved on the rotating shaft, and the other end is fixed to the inner wall of the vertical air duct, and the rotating shaft can rotate relative to the support members.

[0025] Optionally, the rotating shaft is located on the upper side of the wind resistance rotation, one end is connected to the wind resistance turntable, the other end passes through the bottom of the material pot and is connected to one end of the horizontal drive shaft through a reversing transmission device, and the other end of the horizontal drive shaft extends out of the outside of the material pot for connection with the driving device.

[0026] In a second aspect, the utility model further provides a vertical fluidized bed, comprising a material pot air inlet mechanism of any implementation method in the first aspect.

[0027] In a third aspect, the utility model further provides a one-step granulator, comprising a material pot air inlet mechanism of any implementation method in the first aspect.

[0028] The above technical solution of the utility model has the following advantages:

[0029] The utility model provides a material pot air inlet mechanism, including a vertical air duct for connecting with the material pot, a wind resistance turntable arranged in the vertical air duct and located at the bottom lower side of the material pot, and a rotating shaft connected with the wind resistance turntable. At least two areas with different wind resistance are distributed on the wind resistance turntable along the circumferential direction. When the rotating shaft rotates, it can drive the wind resistance turntable to rotate relative to the vertical air duct and the bottom of the material pot, so that the incoming air passes through the wind resistance turntable and then enters the material pot through the bottom of the material pot. During the rotation of the wind resistance turntable, the boiling areas of the material in the material pot with different degrees of change also change continuously, effectively solving three problems: first, the low wind resistance area breaks up the material to prevent the problem of compaction and bed collapse; second, the high wind resistance area reduces the total air volume, so that the vertical wind speed in the scattered section in the diffusion section is reduced, preventing the lighter fine powder in the material from being blown onto the filter to form adhesion, and solving the problem that the lighter fine powder is separated from the material and destroys the content and powder mixing uniformity; third, the reduced wind speed increases the time for hot air to absorb the moisture of the material, improves the efficiency of using hot air to take away the moisture / solvent, and reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings of the present invention are provided for illustrative purposes only, and the proportions and quantities of the components in the drawings may not necessarily be consistent with the actual product.

[0031] Figure 1 It is a schematic diagram of an air inlet mechanism for a material pot in an embodiment of the utility model;

[0032] Figure 2 yes Figure 1 Schematic diagram of the air inlet mechanism of the middle material pot from another angle;

[0033] Figure 3 yes Figure 2 AA cross-sectional diagram of ;

[0034] Figure 4 This is a schematic diagram of the structure of a wind resistance rotating disk in an embodiment of the utility model;

[0035] Figure 5 yes Figure 4 A top view schematic diagram of the windage turntable in FIG.

[0036] Figure 6 It is a schematic diagram of the structure of another wind resistance rotating disk in an embodiment of the utility model;

[0037] Figure 7 It is a structural schematic diagram of another wind resistance rotating disk in the embodiment of the utility model;

[0038] Figure 8 This is a structural schematic diagram of another wind resistance rotating disk in an embodiment of the utility model;

[0039] Fig. 9 It is a schematic diagram of the main structure of a one-step granulator in an embodiment of the utility model;

[0040] Fig.10 yes Fig. 9 Another perspective diagram of the main structure of the one-step granulator (part C in the figure is a partial cross-section diagram);

[0041] Fig.11 yes Fig.10 Enlarged schematic diagram of middle C part;

[0042] Fig.12 yes Figure 3 A magnified schematic diagram of part B;

[0043] Fig.13 It is a partial enlarged schematic diagram of another wind resistance rotating disk and the air inlet section in the embodiment of the utility model;

[0044] Fig.14 yes Fig.10 A partial cross-sectional diagram of the connection between the material pot and the air inlet section of the middle-stage pelletizing machine.

[0045] Fig.15 It is a partial cross-sectional schematic diagram of another one-step pelletizing machine in the embodiment of the utility model in the exploded state of the material pot and the air inlet section;

[0046] Fig.16 It is a partial cross-sectional schematic diagram of a disassembled state of a material pot and an air inlet section of another one-step pelletizing machine in an embodiment of the utility model;

[0047] Fig.17 It is a partial cross-sectional schematic diagram of a disassembled state of a material pot and an air inlet section of another one-step pelletizing machine in an embodiment of the utility model;

[0048] Fig.18 It is a partial cross-sectional schematic diagram of a disassembled state of a material pot and an air inlet section of another one-step pelletizing machine in an embodiment of the utility model.

[0049] In the figure:

[0050] 100: air inlet mechanism of the material pot; 101: air inlet section; 102: air inlet; 103: wind resistance turntable; 1031: low wind resistance area; 1032: high wind resistance area; 1033: medium wind resistance area; 104: rotating shaft; 105: supporting member; 106: bearing; 107: radial clearance; 108: axial clearance; 109: L-shaped clearance; 200: driving device; 300: material pot; 301: bottom of the material pot; 302: extension section of the material pot; 400: connecting section; 500: reversing transmission device; 600: horizontal driving shaft. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0053] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the description of the present invention, "strong boiling", "medium boiling" and "low boiling" are all artificial definitions of the degree to which the material is blown up by the incoming wind (material state), which are relative concepts. Those skilled in the art can adjust or define the specific blowing degree of the material in each state according to different materials and processes. In order to facilitate the understanding of the present invention, the applicant provides an exemplary explanation of the terms "strong boiling", "medium boiling" and "low boiling", which is not a limitation of the present invention:

[0055] Strong boiling: The powder material is blown up and down by the wind in the material pot, and it keeps rolling and rising. Generally, when the height of the material after rising (calculated from the bottom of the material pot) exceeds 2 times of the static thickness, it is called strong boiling.

[0056] Medium boiling: The powder material is blown up and down by the wind in the material pot, and it keeps rolling and rising. Generally, when the height of the material after rising (calculated from the bottom of the material pot) exceeds 1.5 to 2 times the static thickness, it is called medium boiling.

[0057] Micro-boiling: The powder material is blown by the incoming wind in the material pot. Generally, when the height of the material after rising (calculated from the bottom of the material pot) is not higher than 1.5 times the static thickness, it is called micro-boiling.

[0058] like Figure 1 to Figure 3 As shown, the material pot air inlet mechanism 100 provided in the embodiment of the utility model includes a vertical air duct for connecting with the material pot, a wind resistance turntable 103 arranged in the vertical air duct, and a rotating shaft 104 connected with the wind resistance turntable 103.

[0059] exist Figure 1 to Figure 3 and Fig.14 In the example shown, the air inlet section 101 is a vertical air duct, and the air inlet 102 is arranged on the side wall of the air inlet section 101. The air inlet section 101 is directly connected to the material pot 300. The wind resistance rotating disk 103 is located at the lower side of the bottom of the material pot and is arranged in the air inlet section 101, so that the incoming air passes through the wind resistance rotating disk 103 and then enters the material pot through the bottom of the material pot. One end of the rotating shaft 104 extends into the air inlet section 101 and is connected to the wind resistance rotating disk 103, and the other end extends out of the air inlet section 101 for connecting with the driving device 200 (see Fig. 9 and Fig.10 ). See Figure 1 , Figure 4 and Figure 5 As shown, there are at least two areas with different wind resistances distributed along the circumferential direction on the wind resistance rotating disk 103. When the rotating shaft 104 rotates, it can drive the wind resistance rotating disk 103 to rotate relative to the air inlet section 101 and the bottom of the material pot. As the wind resistance rotating disk 103 rotates, the positions of the areas with different wind resistances change periodically relative to the bottom of the material pot, so that the air intake volume of the air intake area at the bottom of the material pot changes periodically.

[0060] It is worth mentioning that the air inlet section 101 can adopt the existing structure, which can be a cavity structure with an open top, and its side wall is adjusted with an air inlet 102 or connected to a horizontal air inlet pipe; it can also be an L-shaped pipe structure perpendicular to the bottom of the material pot, which is not limited here.

[0061] In a preferred embodiment, see Fig. 9 , Fig.10 and Fig.14 The upper end of the air inlet section 101 is docked with the material pot 300, and an annular sealing airbag or sealing ring (not shown in the figure) is provided on the docking surface between the air inlet section 101 and the material pot 300. In a specific example, there is no fastener such as bolts between the upper end of the air inlet section 101 and the material pot 300, and a groove is provided on the docking surface of the two, which is used to accommodate the annular sealing airbag or sealing ring when docking to achieve a sealed connection. When unloading is required, the material pot 300 can be easily separated from the air inlet section 101. Of course, in some other examples, the air inlet section 101 and the material pot 300 can also be connected by a flange connection or a quick-release locking buckle connection.

[0062] Of course, in another example, the rotating shaft 104 may be entirely located in the air inlet section 101 , and the driving device 200 may be located outside the air inlet section 101 or may be disposed inside the air inlet section 101 .

[0063] In one example, see Figure 4 and Figure 5As shown, the wind resistance turntable 103 is divided into four areas in the circumferential direction, two of which are low wind resistance areas 1031, and the other two areas are high wind resistance areas 1032. The corresponding low wind resistance area 1031 has a large air intake, and the high wind resistance area 1032 has a small air intake. As the wind resistance turntable 103 rotates, the air intake of a certain air intake area at the bottom of the material pot changes periodically. The area corresponding to the low wind resistance area 1031 provides a relatively large air volume to achieve strong boiling, break up the material to prevent agglomeration, compaction, bed collapse, etc., and also can make the material (fine powder or particles, etc.) in the material pot boil to a certain height. The area corresponding to the high wind resistance area 1032 provides a relatively small air volume to achieve micro-boiling, which not only reduces the total air volume, but also reduces the wind speed, preventing the fine powder in the powder from being blown onto the filter to form adhesion, destroying the serious problem of powder mixing uniformity. In addition, micro-boiling can prevent material powder from falling into the air inlet section 101. In addition, micro-boiling increases the time for hot air to absorb moisture from the material, improves the efficiency of using hot air to remove moisture / solvent, and reduces energy consumption.

[0064] It is worth noting that the air volume and air pressure required for strong boiling and slight boiling can be selected and set according to the material and process.

[0065] It is worth noting that see Figures 4 to 8 As shown, the number of regions with different wind resistance can be one or more, the areas between the regions with different wind resistance can be the same or different, the positions can be evenly distributed around the circumference or distributed as needed, and the specific setting and selection can be based on the material and process, and no limitation is made here.

[0066] It is also worth noting that the low wind resistance area 1031 can be a continuous and unobstructed area (see Figure 4 , Figure 5 , Figure 7 and Figure 8 ), or it can be a hole of any shape with low wind resistance (see Figure 6 ). The high wind resistance area 1032 may be a completely impermeable area (see Figure 4 and Figure 5 ), or a small hole that meets the wind resistance requirements (see Figure 6 to Figure 8 ). If the area corresponding to the high wind resistance area 1032 does not enter the wind, the blown materials in this area are allowed to have time to fall down to meet different process requirements. At this time, the area of ​​the high wind resistance area 1032 and the rotation beam of the wind resistance rotating disk 103 can be set as required, and no further details are given here.

[0067] In a preferred embodiment, three regions with different wind resistance are distributed along the circumferential direction on the wind resistance rotating disk 103, and the number of each region with different wind resistance is one or more. Figure 7As shown, the wind resistance turntable 103 has six areas in the circumferential direction, two of which are low wind resistance areas 1031, two of which are high wind resistance areas 1032, and two of which are medium wind resistance areas 1033. The same wind resistance areas are evenly spaced in the circumferential direction. Among them, the air intake of the medium wind resistance area is between the air intake of the low wind resistance area 1031 and the high wind resistance area 1032. The medium wind resistance area 1033 is used as a supplementary form to further solve the problems of compaction, bed collapse and boiling state, while improving the drying efficiency. Similarly, in an embodiment with more levels of different wind resistance areas, for example, the wind resistance turntable 103 has four or five different wind resistance areas. In one example, the maximum wind resistance area can be ventilated. At this time, the maximum wind resistance area is a high wind resistance area to achieve micro-boiling, and the minimum wind resistance area is a low wind resistance area to achieve strong boiling. The wind resistance of other wind resistance areas is between the maximum wind resistance area and the minimum wind resistance area. In another example, the area with the largest wind resistance is not ventilated, and the area with the second largest wind resistance can be ventilated to achieve micro-boiling, and the area with the smallest wind resistance is a low wind resistance area to achieve strong boiling.

[0068] It is worth explaining that the "low", "medium" and "high" in the "low wind resistance area", "medium wind resistance area" and "high wind resistance area" in the utility model are relative concepts. The "low wind resistance area" provides a large air volume to achieve strong boiling of the material, the "high wind resistance area" provides a small air volume or even no air intake to achieve slight boiling of the material or no air intake, and the air intake of the "medium wind resistance area" is between the "low wind resistance area" and the "high wind resistance area". The specific parameter settings are related to the material and process requirements. Under the guidance of the concept of the utility model, those skilled in the art can select and set according to their needs. For example, the air intake in the low wind resistance area and the high wind resistance area can both achieve strong boiling, but the degree of strong boiling is different; or the air intake in the low wind resistance area and the high wind resistance area can only reach medium boiling or slight boiling, and the difference is only the degree of each boiling state. The schemes for three different wind resistance areas or more different wind resistance areas can be set in the same way, which will not be repeated here.

[0069] In one example, each area with different wind resistance is achieved by setting different opening ratios in the respective area.

[0070] In this embodiment, the wind resistance rotating disk 103 needs to be able to rotate relative to the air inlet section 101. The specific implementation method thereof can be any existing structure. In one example, see Figure 3 and Fig.12As shown, there is a radial gap 107 between the outer peripheral side of the wind resistance rotating disk 103 and the side wall of the air inlet section 101. While ensuring the normal rotation of the wind resistance rotating disk 103, the radial gap 107 can also achieve strong boiling of the peripheral area of ​​the material pot bottom through the air intake to avoid the material on the side wall of the material pot. In order to minimize the influence of the radial gap 107 on the air intake of the wind resistance rotating disk 103, preferably, in the same time period, the air intake of the radial gap 107 is not more than 20% of the air intake of the wind resistance rotating disk 103. For example, the instantaneous air intake of the radial gap 107 is 10%, 5%, 2% of the instantaneous air intake of the wind resistance rotating disk 103 as a whole. Preferably, the size of the radial gap 107 in the gap direction is not more than 5mm. Of course, if the size of the radial gap 107 in the gap direction is relatively large (which has an adverse effect on the air intake of the wind resistance rotating disk 103), the wind resistance of the wind resistance rotating disk 103 can be designed to meet the production needs. As for how to adjust it, it is a conventional technology in the field and will not be repeated here.

[0071] In another example, while ensuring that the wind resistance rotating disk 103 can rotate normally relative to the air inlet section 101, it is necessary to ensure that the edge area of ​​the wind resistance rotating disk 103 is a high wind resistance area. Fig.13 As shown, a circle of L-shaped notches is provided on the inner side of the upper end of the air inlet section 101, and its cross-section is L-shaped, forming a step shape. The wind resistance rotary disk 103 extends into the L-shaped notch in the radial direction, and there is an L-shaped gap 109 between the wall of the L-shaped notch, that is, there are gaps between the lower end surface of the wind resistance rotary disk 103 and the lower side wall of the L-shaped notch, and between the outer peripheral side of the wind resistance rotary disk 103 and the vertical wall of the L-shaped notch. The two gaps are L-shaped, and the incoming air will be blocked here, forming a high wind resistance area here, reducing the impact on the incoming air of the wind resistance rotary disk 103. Fig.13 The one shown in Fig.12 The structure of another embodiment of the same position of the device.

[0072] In order to maximize the wind resistance at the edge of the wind resistance rotating disk 103 (the matching area between the wind resistance rotating disk 103 and the air inlet section 101), preferably, the L-shaped gap 109 should be as small as possible while satisfying the condition that the wind resistance rotating disk 103 can rotate relative to the air inlet section 101 (no interference occurs during rotation). That is, in consideration of processing accuracy, assembly accuracy and cost, the L-shaped gap 109 should be as small as possible. In one example, the L-shaped gap 109 can be any size of 0.5 mm, 1 mm, 1.5 mm, etc. that does not exceed 2 mm.

[0073] It is worth noting that if the size of the axial gap 108 in the gap direction is relatively large (which has an adverse effect on the air intake of the wind resistance disk 103), the wind resistance of the wind resistance disk 103 can be designed to meet production needs. As for how to adjust it, it is a conventional technology in the field and will not be elaborated here.

[0074] In this embodiment, the wind resistance rotating disk 103 needs to be able to rotate relative to the bottom 301 of the material pot, and its specific implementation can be any existing structure that meets the requirements, for example, it can be a sliding contact connection structure; it can also be an interval sliding connection structure. Fig.10 and Fig.11 As shown, there is an axial gap 108 between the wind resistance rotating disk 103 and the bottom 301 of the material pot.

[0075] In order to reduce the pressure equalization caused by the distance after the wind passes through the wind resistance rotating disk 103, thereby affecting the air intake of the material pot, and further affecting the control of the air intake or increasing the difficulty of adjusting the air volume, preferably, the axial gap 108 is as small as possible under the condition that the wind resistance rotating disk 103 can rotate relative to the bottom 301 of the material pot. In consideration of the processing accuracy, assembly accuracy and cost, the axial gap 108 should be as small as possible. In an example, the axial gap 108 can be any size not exceeding 5mm, such as 0.5mm, 1mm, 1.5mm, 2mm, 3mm, 5mm, etc.

[0076] In order to better arrange the areas with different wind resistance of the wind resistance turntable 103 and better cover the bottom 301 of the material pot, in one example, the areas with different wind resistance are all set to be fan-shaped.

[0077] In this embodiment, the bottom 301 of the material pot is any existing structure, for example, a perforated plate structure or a screen structure, which will not be described in detail here.

[0078] In this embodiment, the wind resistance turntable 103 is arranged parallel to the bottom 301 of the material pot. Preferably, the radial dimension of the wind resistance turntable 103 can be slightly larger than or equal to the bottom 301 of the material pot, so that the entire area of ​​the bottom 301 of the material pot can be covered.

[0079] For some examples, see Fig.15As shown, the lower end of the material pot 300 has a material pot extension section 302, and the air inlet section 101 is connected to the material pot extension section 302, that is, the cavity of the air inlet section 101 and the cavity surrounded by the material pot extension section 302 together constitute a vertical air duct, and the wind resistance rotary disk 103 is arranged in the material pot extension section 302. It is worth noting that in one example, a radial gap 107 can be set between the wind resistance rotary disk 103 and the inner wall of the material pot extension section 302, and an L-shaped gap 109 can also be set. For details, please refer to the matching relationship between the above-mentioned wind resistance rotary disk 103 and the air inlet section 101, which will not be repeated here. Preferably, the upper end of the air inlet section 101 is connected to the material pot extension section 302, and an annular sealing airbag or sealing ring (not shown in the figure) is provided on the connecting surface of the two. When it is necessary to remove the material, it is separated from the connection between the air inlet section 101 and the material pot extension section 302, and the material pot can be easily removed and unloaded without removing fasteners such as bolts, while meeting the sealing requirements.

[0080] For some examples, see Fig.16 As shown, the vertical air duct includes an air inlet section 101 and a connecting section 400. The air inlet section 101 is connected to the material pot 300 through the connecting section 400, that is, the cavity of the air inlet section 101 and the cavity surrounded by the connecting section 400 together constitute the vertical air duct, and the wind resistance turntable 103 is arranged in the connecting section 400.

[0081] In one example, a radial gap 107 can be set between the wind resistance dial 103 and the inner wall of the connecting section 400, and an L-shaped gap 109 can also be set. For details, please refer to the matching relationship between the wind resistance dial 103 and the air inlet section 101 mentioned above, which will not be repeated here. In one example, the connecting section 400 is a flange gasket, the material pot 300 and the air inlet section 101 are connected by a flange plate, and the flange gasket is located between the two flange plates. In another example. The connecting section 400 is a cylindrical structure, and flange plates are provided at both ends, which are flange-connected to the material pot 300 and the air inlet section 100 respectively. In another example, the connecting section 400 is a circular ring.

[0082] In some examples, the connecting section 400 is bolted to the material pot 300 for clamping the bottom 301 of the material pot on the material pot 300. In order to facilitate the unloading operation, no bolt fasteners are provided between the connecting section 400 and the air inlet section 11. An annular sealing airbag or a sealing ring is provided at the joint surface between the connecting section 400 and the air inlet section 101. When the material needs to be unloaded, the connecting section 400 and the air inlet section 101 are separated from the connection, and the material pot is removed for unloading.

[0083] In another example, the connecting section 400 is butted against the material pot 300 without fasteners such as bolts, and an annular sealing airbag or sealing ring is provided at the butt surface between the connecting section 400 and the material pot 300. The connecting section 400 and the air inlet section 101 are connected with fasteners such as bolts. When the material needs to be removed, the connecting section 400 is separated from the connection between the material pot 300, and the material pot is removed for unloading.

[0084] Based on the example that the rotating shaft is located in the vertical air duct or extends downward from the vertical air duct, it is further preferred that a plurality of support members 105 are arranged in the vertical air duct to make the rotating shaft 104 more stable. Figure 3 As shown, a plurality of support members 105 are provided in the air inlet section 101, one end of the plurality of support members 105 is connected to a bearing 106 sleeved on the rotating shaft 104, and the other end is fixed to the inner wall of the air inlet section 101, and the rotating shaft 104 can rotate relative to the support members 105. In this example, the support members 105 and the bearings 106 form a support frame for providing more stable support for the rotating shaft 104. The support members 105 may be support rods or support plates.

[0085] For some examples, see Fig.17 and Fig.18 As shown, the rotating shaft 104 passes through the bottom 301 of the material pot upwards and enters the material pot 300, and is connected to one end of the horizontal driving shaft 600 through the reversing transmission device 500, and the other end of the horizontal driving shaft 600 extends out of the material pot 300 for connecting to the driving device. The reversing transmission device 500 can adopt an existing structure such as an existing reversing gear box.

[0086] In the present invention, the driving device 200 only needs to be able to drive the rotating shaft to rotate, and can be an electric motor, a motor and other devices, which are not limited here.

[0087] This embodiment also provides a one-step granulator, see Fig. 9 and Fig.10As shown, it shows the main structure of a one-step granulator, and any one of the above-mentioned embodiments of the material pot air inlet mechanism 100 is arranged at the lower side of the material pot 300, so that the air enters the material pot 300 through the bottom of the material pot after passing through the wind resistance rotary disk 103 of the material pot air inlet mechanism 100. During the rotation of the wind resistance rotary disk 103, the boiling areas (such as strong boiling areas and slight boiling areas) of the material in the material pot 300 are continuously rotated (changed), which effectively solves three problems: first, the low wind resistance area breaks up the material to prevent the problem of compaction and bed collapse; second, the high wind resistance area reduces the total air volume, so that the vertical wind speed in the dispersion section in the diffusion section is reduced, preventing the lighter fine powder in the material from being blown onto the filter to form adhesion, and solving the problem that the lighter fine powder is separated from the material and destroys the content and powder mixing uniformity; third, the reduced wind speed increases the time for hot air to absorb the moisture of the material, improves the efficiency of using hot air to take away the moisture / solvent, and reduces energy consumption. The other structures of the one-step granulator can be made by using the existing technology, which will not be described in detail here.

[0088] The present embodiment provides a vertical fluidized bed, and the lower side of the material pot 300 is provided with any of the material pot air inlet mechanisms 100 in the above-mentioned embodiment. Compared with the one-step granulator, the vertical fluidized bed is mainly different in use, that is, the vertical fluidized bed is generally used for wet granulation drying, while the one-step granulator realizes one-step granulation (including wet granulation drying). As for the structures of the two, the vertical fluidized bed generally only reduces some nozzles relative to the one-step granulator, and a schematic diagram of the vertical fluidized bed is not made here. In addition, the material pot air inlet mechanism 100 in this example plays the same role in the vertical fluidized bed and the one-step granulator, which will not be repeated here.

[0089] In this embodiment, except for the air inlet mechanism of the material pot, other structures of the vertical fluidized bed and the one-step granulator can adopt the existing technology and will not be described in detail here.

[0090] In summary, the utility model provides a material pot air inlet mechanism based on the material melting characteristics, drying characteristics and principle of strong boiling to break up lumps during the drying process. The mechanism can be used in a boiling drying bed or a one-step granulation drying bed. When the wind resistance turntable rotates around the bottom center of the material pot, the boiling areas of the material in the material pot with different degrees of boiling also rotate (change) continuously, effectively solving three problems: first, the material is broken up in the low wind resistance area to prevent the problems of compaction and bed collapse; second, the total air volume is reduced in the high wind resistance area, so that the vertical wind speed in the dispersion section in the diffusion section is reduced, preventing the lighter fine powder in the material from being blown onto the filter to form adhesion, and solving the problem that the lighter fine powder is separated from the material and destroys the content and uniformity of powder mixing; third, reducing the wind speed increases the time for hot air to absorb moisture from the material, improves the efficiency of using hot air to remove moisture / solvent, and reduces energy consumption.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that not every embodiment contains only one independent technical solution. In the absence of a conflict of solutions, the various technical features mentioned in each embodiment can be combined in any way to form other implementation methods that can be understood by those skilled in the art.

[0092] In addition, without departing from the scope of the present invention, the technical solutions described in the aforementioned embodiments may be modified, or some of the technical features may be replaced by equivalents, without causing the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A material pot air inlet mechanism, comprising a vertical air duct connected to the material pot, wherein the side wall of the vertical air duct is provided with an air inlet, characterized in that: It also includes a wind resistance rotating disk and a rotating shaft, wherein the wind resistance rotating disk is arranged in the vertical air duct and is located at the lower side of the bottom of the material pot, so that the incoming air passes through the wind resistance rotating disk and then enters the material pot through the bottom of the material pot, one end of the rotating shaft is connected to the wind resistance rotating disk, and the other end is used to be connected to the driving device; At least two areas with different wind resistances are distributed on the wind resistance turntable along the circumferential direction, and when the rotating shaft rotates, it can drive the wind resistance turntable to rotate relative to the vertical air duct and the bottom of the material pot.

2. The material pot air inlet mechanism according to claim 1, characterized in that: The wind resistance rotating disk is provided with three areas with different wind resistances distributed along the circumferential direction, and the number of each area with different wind resistances is one or more.

3. The material pot air inlet mechanism according to claim 1 or 2, characterized in that: Different wind resistance areas are achieved by setting different opening rates in their respective areas.

4. The material pot air inlet mechanism according to claim 1, characterized in that: A radial gap is provided between the outer peripheral side of the wind resistance rotating disk and the side wall of the vertical air duct.

5. The material pot air inlet mechanism according to claim 4, characterized in that: In the same time period, the air intake of the radial gap is not greater than 20% of the air intake of the wind resistance rotary disk.

6. The material pot air inlet mechanism according to claim 1, characterized in that: The side wall of the vertical air duct is provided with an L-shaped notch along the circumferential direction, and the wind resistance rotating disk extends into the L-shaped notch and has an L-shaped gap between the wind resistance rotating disk and the wall of the L-shaped notch.

7. The material pot air inlet mechanism according to claim 6, characterized in that: Under the condition that the wind resistance rotating disk can rotate relative to the vertical air duct, the L-shaped gap is as small as possible.

8. The material pot air inlet mechanism according to claim 1, characterized in that: An axial gap is provided between the wind resistance rotating disk and the bottom of the material pot.

9. The material pot air inlet mechanism according to claim 8, characterized in that: Under the condition that the wind resistance turntable can rotate relative to the bottom of the material pot, the axial gap is as small as possible.

10. The material pot air inlet mechanism according to claim 1, characterized in that: Each area with different wind resistance is set in a sector shape.

11. The material pot air inlet mechanism according to claim 1, characterized in that: The bottom of the material pot is a perforated plate structure or a screen structure.

12. The material pot air inlet mechanism according to claim 1, characterized in that: The vertical air duct includes an air inlet section, the air inlet is arranged on the side wall of the air inlet section, the air inlet section is connected to the material pot, and the wind resistance turntable is arranged in the air inlet section.

13. The material pot air inlet mechanism according to claim 12, characterized in that: The upper end of the air inlet section is butt-jointed with the material pot, and an annular sealing airbag or a sealing ring is arranged on the butt-jointed surfaces of the two.

14. The material pot air inlet mechanism according to claim 1, characterized in that: The vertical air duct includes an air inlet section and a connecting section, the air inlet section is connected to the material pot through the connecting section, and the wind resistance turntable is arranged in the connecting section.

15. The material pot air inlet mechanism according to claim 14, characterized in that: The upper end of the connecting section is butted against the material pot, an annular sealing airbag or a sealing ring is provided on the butt surface of the two, and the connecting section is tightly connected to the air inlet section; or The connecting section is tightly connected to the material pot, the lower end of the connecting section is butt-jointed with the upper end of the air inlet section, and an annular sealing airbag or a sealing ring is provided on the butt joint surface between the connecting section and the air inlet section.

16. The material pot air inlet mechanism according to claim 1, characterized in that: The vertical air duct includes a material pot extension section and an air inlet section. The material pot extension section is formed by the material pot extending downward as a whole. The air inlet section is connected to the material pot extension section. The wind resistance turntable is arranged in the material pot extension section.

17. The material pot air inlet mechanism according to claim 16, characterized in that: The upper end of the air inlet section is butt-jointed with the material pot extension section, and an annular sealing airbag or a sealing ring is provided on the butt-jointed surfaces of the two.

18. The material pot air inlet mechanism according to claim 1, characterized in that: The rotating shaft is located at the lower side of the wind resistance rotating disk, one end of which is connected to the wind resistance rotating disk, and the other end of which is located in the vertical air duct or extends out of the vertical air duct for connection with a driving device.

19. The material pot air inlet mechanism according to claim 18, characterized in that: A plurality of supporting members are also provided in the vertical air duct, one end of each of the supporting members is connected to a bearing sleeved on the rotating shaft, and the other end is fixed to the inner wall of the vertical air duct, and the rotating shaft can rotate relative to the supporting members.

20. The material pot air inlet mechanism according to claim 1, characterized in that: The rotating shaft is located on the upper side of the wind resistance rotation, one end of which is connected to the wind resistance turntable, and the other end passes through the bottom of the material pot and is connected to one end of the horizontal driving shaft through a reversing transmission device. The other end of the horizontal driving shaft extends out of the outside of the material pot for connection with the driving device.

21. A vertical fluidized bed, characterized in that: It comprises the material pot air inlet mechanism as described in any one of claims 1 to 20.

22. A one-step granulator, characterized in that: It comprises the material pot air inlet mechanism as described in any one of claims 1 to 20.

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