Rotary drying equipment

Abstract

The utility model discloses rotary drying equipment which comprises a rotary cylinder and a pair of hollow rotating shafts connected with the rotary cylinder and used for driving the rotary cylinder to rotate. Wherein the rotary cylinder comprises a rotary outer container, a rotary inner container arranged in the rotary outer container and provided with a drying cavity, and an airflow cavity formed between the rotary outer container and the rotary inner container; a plurality of protruding blocks are arranged on the inner wall, facing the drying cavity, of the rotary inner container at intervals, and filter screen plate assemblies are arranged on at least part of the protruding blocks. Each filter screen plate assembly comprises a bulge-shaped filter screen cover arranged on the convex block, a hollow opening formed in the side end face, facing the drying cavity, of the filter screen cover, and a filter screen covering the hollow opening; a filter screen cover of each filter screen plate assembly is connected with a transition pipe in a matched mode, and each transition pipe penetrates through the side wall of the rotary inner container and then is communicated with a coil pipe arranged in the airflow cavity. And the coil pipe is communicated with a main connecting pipe arranged in one of the hollow rotating shafts.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, and in particular to a rotary drying device. Background Technology

[0002] Rotary vacuum dryers are a type of drying equipment. In the process of using rotary vacuum dryers, a heat source is generally used to dry the materials in the rotary vacuum dryer. The heat is conducted to the horizontal drying chamber through the side wall of the rotary vacuum dryer. The water vapor generated during the drying process is then extracted and recovered through vacuum tubes.

[0003] In response, CN220083458U discloses a rotary vacuum drying device, whose rotary drum includes a rotary inner liner and a heating chamber located on the outer side of the rotary inner liner; and multiple filter screen assemblies are arranged at intervals on the outer wall of the rotary inner liner; each filter screen assembly includes a perforation integrally formed on the side wall of the rotary inner liner, a filter screen welded to the side wall of the rotary inner liner to cover the perforation, and a bulging filter screen cover welded to the outer wall of the rotary inner liner and suitable for covering the filter screen; the filter screen covers of multiple filter screen assemblies are connected by a coil. Based on this drying device, the area formed for heating the material and the filtration area are limited by the side wall area of ​​the rotary inner liner. Actual use has revealed the following problems:

[0004] With the overall dimensions of the rotating inner chamber remaining unchanged, the heating area and the filtration area are correspondingly limited, thus limiting the drying efficiency of the material and making it difficult to improve.

[0005] Based on the above problems, in order to improve the efficiency of material drying, it is necessary to further optimize and improve the structure of rotary drying equipment. Utility Model Content

[0006] The purpose of this invention is to provide a rotary drying device to solve the technical problem of improving the efficiency of material drying.

[0007] The rotary drying equipment of this utility model achieves this as follows:

[0008] A rotary drying device includes: a rotary drum and a pair of hollow rotating shafts connected to the rotary drum for driving the rotary drum to rotate; wherein

[0009] The rotary drum includes a rotary outer liner, a rotary inner liner disposed inside the rotary outer liner and having a drying cavity, and an airflow cavity formed between the rotary outer liner and the rotary inner liner;

[0010] The rotating inner liner has a plurality of protrusions spaced apart on the inner wall facing the drying chamber, and at least some of the protrusions are provided with filter screen assemblies;

[0011] Each of the filter screen assembly includes a bulging filter screen cover disposed on the protrusion, a cutout formed on the side end face of the filter screen cover facing the drying chamber, and a filter screen covering the cutout.

[0012] Each filter screen assembly is equipped with a transition tube, and each transition tube passes through the side wall of the rotating inner liner and connects to the coil built into the airflow cavity; the coil is connected to a main connecting tube provided in one of the hollow rotating shafts.

[0013] In an optional embodiment of this invention, each of the protrusions is V-shaped; and

[0014] Each of the protrusions includes a pair of side plates arranged opposite each other to form a V-shaped ridge, and the V-shaped ridge of each of the protrusions faces the drying cavity;

[0015] Each of the two side plates of the protrusion is provided with a filter screen assembly.

[0016] In an optional embodiment of this invention, the filter screen is detachably fixed to the side plate.

[0017] In an optional embodiment of this invention, each of the protrusions is welded and fixed to the inner wall of the rotating inner liner facing the drying cavity.

[0018] In an optional embodiment of this invention, the protrusions on the inner wall of the rotating inner liner facing the drying cavity are evenly distributed; and

[0019] The rotary cylinder includes an upper conical cylinder, a lower conical cylinder, and a cylindrical cylinder disposed between the upper and lower conical cylinders; and a pair of hollow rotating shafts are both connected to the cylindrical cylinder;

[0020] Multiple filter screen assemblies are distributed circumferentially and axially within the upper conical cylinder and / or lower conical cylinder and / or cylindrical cylinder.

[0021] In an optional embodiment of this utility model, a plurality of filter screen assemblies arranged in a circular pattern are respectively provided in the upper conical cylinder and the lower conical cylinder, and a protrusion without a filter screen assembly is spaced between each two adjacent filter screen assemblies along the circumferential direction.

[0022] In an optional embodiment of this utility model, the coil includes an upper coil for simultaneously connecting the transition tubes corresponding to each filter plate assembly located in the upper conical cylinder, and a lower coil for simultaneously connecting the transition tubes corresponding to each filter plate assembly located in the lower conical cylinder.

[0023] In an optional embodiment of this utility model, the upper coil is connected to the main connecting pipe via an upper branch pipe, and the lower coil is connected to the main connecting pipe via a lower branch pipe; and

[0024] The upper coil and the lower coil are also respectively connected to a drain pipe built into the airflow chamber;

[0025] The drain pipe is equipped with a drain port that penetrates the rotating outer liner.

[0026] In an optional embodiment of this utility model, an upper switching valve is provided between the upper coil, the upper branch pipe, and the drain pipe; and

[0027] A lower switching valve is provided between the lower coil, the lower branch pipe, and the drain pipe.

[0028] In an optional embodiment of this utility model, the rotary drum is further provided with an air pipe for air intake into the rotary inner liner after passing through the outer liner.

[0029] By adopting the above technical solution, the present invention has the following beneficial effects: The rotary drying equipment of the present invention, by providing multiple protrusions at intervals on the inner wall of the rotary inner tank facing the drying chamber, greatly increases the contact area between the overall rotary drying equipment and the material without increasing the external size of the overall rotary drying equipment, thereby improving the drying efficiency of the material. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the rotary drying equipment of this utility model;

[0031] Figure 2 This is a schematic diagram of the overall structure of the rotary drum of the rotary drying equipment of this utility model;

[0032] Figure 3 This is a schematic diagram of the layout structure of a ring of filter screens distributed along the circumferential direction in the rotary drying equipment of this utility model.

[0033] Figure 4 This is a schematic diagram of the layout structure of a ring of raised blocks distributed along the circumference on the inner drum of the rotary drying equipment of this utility model.

[0034] In the diagram: Rotary outer liner 11, Rotary inner liner 12, Drying chamber 13, Airflow chamber 14, Filter screen 21, Filter screen 22, Main connecting pipe 31, Transition pipe 32, Side plate 41, V-shaped ridge 42, Upper conical cylinder 51, Lower conical cylinder 52, Columnar cylinder 53, Upper coil 61, Lower coil 62, Upper branch pipe 63, Lower branch pipe 64, Drain pipe 7, Drain interface 71, Upper switching valve 81, Lower switching valve 82, Air pipe 9, Hollow rotating shaft 10. Detailed Implementation

[0035] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0036] Example 1:

[0037] Please see Figures 1 to 4 As shown, this embodiment provides a rotary drying device, including: a rotary drum and a pair of hollow rotating shafts 10 connected to the rotary drum for driving the rotary drum to rotate; wherein the rotary drum includes a rotary outer liner 11, a rotary inner liner 12 disposed inside the rotary outer liner 11 and having a drying cavity 13, and an airflow cavity 14 formed between the rotary outer liner 11 and the rotary inner liner 12. Regarding the pair of hollow rotating shafts 10, their overall structure and operating principle can adopt the mature technology disclosed in announcement number CN220083458U. This embodiment does not improve its specific structure and implementation principle, so it will not be described in this embodiment.

[0038] Based on the above, furthermore, the inner wall of the rotating inner liner 12 facing the drying chamber 13 is provided with multiple protrusions at intervals. That is to say, the surface area of ​​the protrusions is used to increase the contact area with the material, thereby improving the drying efficiency of the material. Based on this, it should be noted that, in order to meet the requirements of vacuum filtration, filter screen 22 plate assemblies are provided on at least some of the protrusions.

[0039] More specifically, each filter plate assembly includes a bulging filter cover 21 disposed on a protrusion, a perforation formed on the side end face of the filter cover 21 facing the drying chamber 13, and a filter 22 covering the perforation. Each filter cover 21 shell of each filter plate assembly is fitted with a transition tube 32, and each transition tube 32 penetrates the side wall of the rotating inner liner 12 and communicates with the coil built into the airflow chamber 14. The coil is connected to a main connecting tube 31 disposed in one of the hollow rotating shafts 10. The specific structure and implementation principle of the main connecting tube 31 in the hollow rotating shaft 10 can adopt the mature technology disclosed in announcement number CN220083458U, and this embodiment does not specifically limit or describe it. Compared to the filter plate assembly disclosed in CN220083458U, this structure can be understood as replacing the hollow opening on the side wall of the rotating inner liner 12 in CN220083458U with the through opening of the transition tube 32 in this embodiment, so that the transition tube 32 can penetrate the side wall of the rotating inner liner 12 to connect with the filter cover 21 and the coil.

[0040] Based on the above structure, the following detailed description, with reference to the accompanying drawings, illustrates a specific optional implementation. Each protrusion is V-shaped, and the size of the included angle of the V-shape formed by the protrusions is not absolutely limited in this embodiment. More specifically, each protrusion includes a pair of side plates 41 arranged opposite each other to form a V-shaped ridge 42, and the V-shaped ridge 42 of each protrusion faces the drying chamber 13; a filter screen assembly is provided on the outer end face of each of the two side plates 41 of each protrusion. In an optional implementation, each protrusion is welded and fixed to the inner wall of the rotating inner liner 12 facing the drying chamber 13, and the filter screen cover 21 is detachable, for example, but not limited to, fixed to the side plate 41 with screws, to facilitate disassembly for maintenance or replacement. Based on this structure, the transition tubes 32 corresponding to the pair of filter screen assemblies on the pair of side plates 41 of each protrusion can be connected in series in the drying chamber 13 to form a pipeline that then passes through the side wall of the rotating inner liner 12 to connect with the filter screen cover 21 and the coil. In this way, only one through-hole needs to be set on the side wall of the rotating inner liner 12 for each protrusion to allow the transition tube to pass through, which can meet the usage requirements.

[0041] Next, referring to the attached figure, a specific optional implementation is given. The protrusions on the inner wall of the rotating inner liner 12 facing the drying chamber 13 are evenly distributed. The even distribution can be evenly distributed along the circumference and axial direction of the drying chamber 13 of the rotating inner liner 12, so that the material is heated evenly in the drying chamber 13.

[0042] Furthermore, the rotary cylinder includes an upper conical cylinder 51, a lower conical cylinder 52, and a cylindrical cylinder 53 disposed between the upper conical cylinder 51 and the lower conical cylinder 52; and a pair of hollow rotating shafts 10 are both connected to the cylindrical cylinder 53; multiple filter screen assemblies are distributed circumferentially and axially within the upper conical cylinder 51 and / or the lower conical cylinder 52 and / or the cylindrical cylinder 53. Here, we will only describe the case where multiple filter screen assemblies are arranged in a ring within the upper conical cylinder 51 and the lower conical cylinder 52, respectively, with reference to the accompanying drawings. In this structure, each pair of adjacent filter screen assemblies along the circumferential direction is spaced apart by a protrusion without a filter screen 22 assembly.

[0043] Based on the above, it should also be noted that the coil includes an upper coil 61 for simultaneously connecting the transition tube 32 corresponding to each filter plate assembly located in the upper conical cylinder 51, and a lower coil 62 for simultaneously connecting the transition tube 32 corresponding to each filter plate assembly located in the lower conical cylinder 52.

[0044] In summary, for the rotary drying equipment of this embodiment, by providing multiple protrusions at intervals on the inner wall of the rotary inner liner 12 facing the drying chamber 13, the overall contact area between the rotary drying equipment and the material is greatly increased without increasing the overall external dimensions of the rotary drying equipment, thereby improving the drying efficiency of the material.

[0045] Example 2:

[0046] Please see Figures 1 to 4 As shown, based on the rotary drying equipment of Embodiment 1, the upper coil 61 of the rotary drying equipment provided in this embodiment is connected to the main connecting pipe 31 through the upper branch pipe 63, and the lower coil 62 is connected to the main connecting pipe 31 through the lower branch pipe 64; and the upper coil 61 and the lower coil 62 are also respectively connected to a drain pipe 7 built into the airflow cavity 14; the drain pipe 7 is equipped with a drain interface 71 that penetrates the rotary outer liner 11.

[0047] Based on the above, an upper switching valve 81 is configured between the upper coil 61, the upper branch pipe 63, and the drain pipe 7; and a lower switching valve 82 is configured between the lower coil 62, the lower branch pipe 64, and the drain pipe 7. The design of the upper and lower switching valves 81 and 82 allows for switching between the upper coil 61 and the lower coil 62 being connected to the main connecting pipe 31 or the drain pipe 7. It should be noted that both the upper and lower switching valves 81 and 82 are located on the outside of the rotating outer tank 11 for easy manual operation. This can be achieved by simply installing a T-junction between the upper coil 61, the upper branch pipe 63, and the drain pipe 7, with the T-junction partially penetrating the rotating outer tank 11 to allow it to engage with the upper switching valve 81. The main connecting pipe 31 is used to extract moisture generated during the material drying process, while the drain pipe 7 is used to discharge washing water generated during the material washing process. In other words, the rotary drying equipment in this embodiment can also dry and wash materials. Based on the principle corresponding to this function, the solution disclosed in announcement number CN220083458U can be adopted. This embodiment does not make any improvements to this, so it will not be described in detail here.

[0048] Based on the above structure, in an optional implementation, the rotary drum used in this embodiment is further equipped with an air pipe 9 for introducing air into the rotary inner drum 12 after passing through the outer rotary drum 11. Gas can be introduced into the drying chamber 13 through this air pipe 9, thereby increasing the air pressure inside the drying chamber 13 and improving the efficiency of moisture extraction during the material washing and drying process.

[0049] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0050] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0054] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A rotary drying apparatus, characterized by, Includes: a rotary drum and a pair of hollow rotating shafts connected to the rotary drum for driving the rotary drum to rotate; in The rotary drum includes a rotary outer liner, a rotary inner liner disposed inside the rotary outer liner and having a drying cavity, and an airflow cavity formed between the rotary outer liner and the rotary inner liner; The rotating inner liner has a plurality of protrusions spaced apart on the inner wall facing the drying chamber, and at least some of the protrusions are provided with filter screen assemblies; Each of the filter screen assembly includes a bulging filter screen cover disposed on the protrusion, a cutout formed on the side end face of the filter screen cover facing the drying chamber, and a filter screen covering the cutout. Each filter screen assembly is equipped with a transition tube, and each transition tube passes through the side wall of the rotating inner liner and connects to the coil built into the airflow cavity; the coil is connected to a main connecting tube provided in one of the hollow rotating shafts.

2. The rotary drying apparatus according to claim 1, characterized in that, Each of the aforementioned protrusions is V-shaped; and Each of the protrusions includes a pair of side plates arranged opposite each other to form a V-shaped ridge, and the V-shaped ridge of each of the protrusions faces the drying cavity; Each of the two side plates of the protrusion is provided with a filter screen assembly.

3. The rotary drying apparatus according to claim 2, wherein The filter screen is detachably fixed to the side plate.

4. The rotary drying apparatus according to any one of claims 1 to 3, characterized in that Each of the protrusions is welded and fixed to the inner wall of the rotating inner liner facing the drying chamber.

5. The rotary drying apparatus according to any one of claims 1 to 3, characterized in that The protrusions on the inner wall of the rotating inner liner facing the drying chamber are evenly distributed; and The rotary cylinder includes an upper conical cylinder, a lower conical cylinder, and a cylindrical cylinder disposed between the upper and lower conical cylinders; and a pair of hollow rotating shafts are both connected to the cylindrical cylinder; Multiple filter screen assemblies are distributed circumferentially and axially within the upper conical cylinder and / or lower conical cylinder and / or cylindrical cylinder.

6. The rotary drying apparatus according to claim 5, wherein The upper and lower conical cylinders are respectively provided with a plurality of filter screen plate assemblies arranged in a circular pattern, and there is a protrusion without a filter screen plate assembly between each two adjacent filter screen plate assemblies along the circumferential direction.

7. The rotary drying apparatus according to claim 6, wherein The coil includes an upper coil for simultaneously connecting the transition tubes corresponding to each filter plate assembly located in the upper conical cylinder, and a lower coil for simultaneously connecting the transition tubes corresponding to each filter plate assembly located in the lower conical cylinder.

8. The rotary drying apparatus according to claim 7, wherein The upper coil is connected to the main connecting pipe via an upper branch pipe, and the lower coil is connected to the main connecting pipe via a lower branch pipe; and The upper coil and the lower coil are also respectively connected to a drain pipe built into the airflow chamber; The drain pipe is equipped with a drain port that penetrates the rotating outer liner.

9. The rotary drying equipment according to claim 8, characterized in that, An upper switching valve is provided between the upper coil, the upper branch pipe, and the drain pipe; and A lower switching valve is provided between the lower coil, the lower branch pipe, and the drain pipe.

10. The rotary drying apparatus according to claim 1, wherein The rotary drum is also equipped with an air pipe for air intake into the rotary inner drum after passing through the outer drum.

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