A drying disc for a disc dryer

Abstract

The present invention provides a drying disc for a disc dryer, comprising: a first semi-circular part and a second semi-circular part, and the second semi-circular part and the first semi-circular part are assembled together to form an integral disc structure; the first semi-circular part and the second semi-circular part have the same structure, and both include: an arc-shaped hollow chamber, and a plurality of arc-shaped guide plates are arranged in the hollow chamber at uniformly spaced intervals in the radial direction, and a one-way circuitous labyrinth flow path is formed by the plurality of arc-shaped guide plates and the inner wall of the hollow chamber; an inlet pipeline and an outlet pipeline are arranged on the outer wall of the hollow chamber, the inlet pipeline is communicated with the inlet of the labyrinth flow path, and the outlet pipeline is communicated with the outlet of the labyrinth flow path. The present invention adopts a labyrinth structure, which can not only uniformly heat the materials on the drying disc, but also avoid the thermal deformation of the drying disc caused by uneven heating, thereby reducing the frequency of shutdown maintenance for the deformed drying disc and rake blades; the overall structure is simple and convenient to manufacture.

Description

Technical Field

[0001] The present invention relates to the field of drying machine devices, and more particularly, to a drying disk for a disk dryer. Background Art

[0002] Currently, for the known vertical tower-shaped disk drying equipment, a feeder continuously adds wet materials to the drying disk at the top. The scraping rake blades make a rotary motion, and the rake blades are designed with specific installation angles according to the large and small disks. The materials on the large drying disk are scraped by the scraping rake blades towards the center and fall onto the small drying disk on the next layer; the materials on the small drying disk are scraped and pushed by the scraping rake blades towards the outer edge and fall onto the large drying disk below. The large and small drying disks are arranged alternately, and the materials on the bottommost drying disk are scraped and pushed by the scraping rake blades to the central discharge port for discharging. During the drying process, the water vapor volatilized from the materials is discharged from the moisture discharge port on the top cover. The prior art uses heat-conducting oil and hot water as heat sources, which enter the jackets inside the large and small drying disks. Especially when heat-conducting oil is used as the heat source for heating, there will be a disadvantage of uneven heating of the local drying disk, and the resulting temperature difference causes the disk to deform. Especially on the upper surface of the drying disk, protrusions will occur, which affects the contact between the rake blades and the convex points of the drying disk during the scraping process, causing the rake blades to be deformed by force, and even jamming may occur, resulting in poor operation of the scraping rake blades, leading to overload of the driving motor current of the drying equipment and shutdown. Therefore, in order to overcome the above problems, it is urgent to improve the structure of the drying disk. Summary of the Invention

[0003] Aiming at the defects in the prior art, the purpose of the present invention is to provide a drying disk for a disk dryer, which solves the defect of uneven heating of the drying disk.

[0004] The present invention provides a drying disk for a disk dryer, comprising:

[0005] A first semi-circular part;

[0006] A second semi-circular part, which forms an integral disk structure after being assembled with the first semi-circular part;

[0007] The first semi-circular part and the second semi-circular part have the same structure, and both include:

[0008] A hollow chamber in an arc shape, in which a number of arc-shaped guide plates are evenly spaced along the radial direction, and a one-way circuitous labyrinth flow channel is formed by the arc-shaped guide plates and the inner wall of the hollow chamber; an inlet pipeline and an outlet pipeline are provided on the outer wall of the hollow chamber, the inlet pipeline is communicated with the inlet of the labyrinth flow channel, and the outlet pipeline is communicated with the outlet of the labyrinth flow channel.

[0009] Preferably, an inlet channel is provided in the arc-shaped hollow chamber. One end of the inlet channel is communicated with the inlet pipeline, and the other end of the inlet channel is communicated with the inlet of the labyrinth channel.

[0010] Preferably, the inlet of the labyrinth channel is arranged inside the hollow chamber, and the outlet of the labyrinth channel is arranged outside the hollow chamber.

[0011] Preferably, the arc-shaped hollow chamber includes:

[0012] A first semi-circular plate;

[0013] A second semi-circular plate, which is matched with the first semi-circular plate in shape and size and is arranged below the first semi-circular plate;

[0014] A connecting plate, which is arranged at the ends of the first semi-circular plate and the second semi-circular plate. Through the connecting plate, the second semi-circular plate and the first semi-circular plate are connected up and down to form a semi-circular frame;

[0015] An inner enclosing plate, which is arranged inside the arc-shaped frame to enclose the inside of the arc-shaped frame;

[0016] An outer enclosing plate, which is arranged outside the arc-shaped frame to enclose the outside of the arc-shaped frame. That is, the arc-shaped hollow chamber is composed of the semi-circular frame, the inner enclosing plate, the connecting plate and the outer enclosing plate.

[0017] Preferably, the second semi-circular part and the first semi-circular part are connected by a connecting plate to form a whole. The connecting plate of the second semi-circular part and the connecting plate of the first semi-circular part are connected by a connecting component.

[0018] Preferably, one end of the arc-shaped guide plate is connected to the connecting plate or the inner side surface of the inlet channel; the upper end surface of the arc-shaped guide plate is connected to the lower surface of the first semi-circular plate, and the lower end surface of the arc-shaped guide plate is connected to the upper surface of the second semi-circular plate.

[0019] Preferably, the upper end surface of the arc-shaped guide plate is connected to the lower surface of the first semi-circular plate by welding, and the lower end surface of the arc-shaped guide plate is connected to the upper surface of the second semi-circular plate by welding.

[0020] Preferably, a plurality of rib plates are provided on the bottom surface of the integral disc structure. Further, the plurality of rib plates are radially distributed around the center of the integral disc structure.

[0021] Preferably, both the inlet pipeline and the outlet pipeline are arranged on the outer edge of the hollow chamber.

[0022] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0023] With the above structure of the present invention, a labyrinth heating runner is adopted, so that the heat-conducting medium flows along a one-way circuitous path in the heating runner, there is no dead zone, and the temperature difference between adjacent runners is extremely small, making the heat-conducting surface of the drying disc uniformly heated, uniformly heating the material during the material drying process, avoiding local deformation of the heat-conducting surface of the drying disc due to excessive temperature difference, and reducing the maintenance frequency of the shutdown equipment; at the same time, by adopting a split design for the drying disc, that is, assembled into an integral structure by two semi-circular parts, the drying disc has a faster heating speed, less heat loss, and a more uniform heat distribution on the heat-conducting surface.

[0024] With the above structure of the present invention, the inlet pipeline and the outlet pipeline of the heat-conducting medium are further arranged on the outer edge of the hollow chamber, that is, on the outer edge of the disc structure, which is convenient for the installation of the pipeline, has fewer equipment connection points, reduces equipment leakage points, and is also convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present invention will become more apparent:

[0026] Figure 1 is a schematic structural view of a drying disc for a disc dryer according to a preferred embodiment of the present invention;

[0027] Figure 2 is a schematic structural view of a first semi-circular part according to a preferred embodiment of the present invention;

[0028] Figure 3 is a sectional view taken along line A-A in the figure;

[0029] The reference numerals in the figure are respectively represented as: inlet pipeline 1, outlet pipeline 2, connecting plate 3, arc guide plate 4, inner enclosing plate 5, rib plate 6, guide plate 7, inlet runner 8, labyrinth runner 9, first semi-circular plate 10, second semi-circular plate 11, outer enclosing plate 12, first semi-circular part 101, second semi-circular part 102. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those of ordinary skill in the art can make several deformations and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0031] Refer to Figure 1As shown in the figure, a drying disc for a disc dryer according to a preferred embodiment of the present invention includes a first semi-circular part 101 and a second semi-circular part 102, which form an integral disc structure after being pieced together by the second semi-circular part 102 and the first semi-circular part 101.

[0032] Referring to Figure 1 As shown in the figure, the structures of the first semi-circular part 101 and the second semi-circular part 102 are the same, and both include: an arc-shaped hollow chamber. Inside the hollow chamber, there are several arc-shaped guide plates 4 evenly spaced along the radial direction. The adjacent arc-shaped guide plates 4 and the inner wall of the hollow chamber form arc-shaped flow channels. Inside the hollow chamber, several arc-shaped flow channels connected end to end are formed from the inside to the outside, that is, a one-way circuitous labyrinth flow channel 9 is formed between several arc-shaped guide plates 4 and the inner wall of the hollow chamber for the heat-conducting medium to flow along the one-way circuitous path in the labyrinth flow channel 9. During the heating process, the heat-conducting medium flows unidirectionally, there is no dead zone, and the temperature difference between adjacent arc-shaped flow channels is extremely small, achieving the purpose of preventing the heat-conducting surface of the drying disc from deforming due to uneven heating.

[0033] An inlet pipeline 1 and an outlet pipeline 2 are provided on the outer wall of the hollow chamber. The inlet pipeline 1 is connected to the inlet of the labyrinth flow channel 9, and the heat-conducting medium is introduced into the labyrinth flow channel 9 through the inlet pipeline 1. The outlet pipeline 2 is connected to the outlet of the labyrinth flow channel 9, and the heat-conducting medium in the labyrinth flow channel 9 is discharged through the outlet pipeline 2.

[0034] As a preferred method, referring to Figure 1 As shown in the figure, both the inlet pipeline 1 and the outlet pipeline 2 are installed on the outer edge of the hollow chamber, that is, on the outer edge of the integral disc structure, which is convenient for the installation of the pipeline, reduces the connection points of the equipment, reduces the leakage points of the equipment, and is convenient for maintenance at the same time.

[0035] In specific implementation, a certain thickness of the material to be dried is evenly covered on the upper surface (i.e., the heat-conducting surface) of the integral disc structure. The high-temperature heat-conducting medium is continuously introduced into the labyrinth flow channel 9 from the inlet pipelines 1 of the first semi-circular part 101 and the second semi-circular part 102 respectively. Through the heat-conducting effect of the upper surface, the heat-conducting medium releases heat to the material. The heat-conducting medium is generally heat-conducting oil, steam, etc.

[0036] In other preferred embodiments, referring to Figure 2 As shown in the figure, an inlet flow channel 8 for guiding the flow is provided in the arc-shaped hollow chamber. One end of the inlet flow channel 8 is connected to the inlet pipeline 1, and the other end of the inlet flow channel 8 is connected to the inlet of the labyrinth flow channel 9. As a preferred method, referring to Figure 2As shown, the inlet flow channel 8 is a space formed by the guide plate 7 and the inner wall of the end face of the hollow chamber for the heat-conducting medium to pass through. One end of the guide plate 7 is connected to the inner wall of the periphery of the hollow chamber, and the other end of the guide plate 7 is connected to one end of the innermost arc-shaped guide plate 4. When the heat-conducting medium passes through the inlet pipelines 1 of the first semi-circular part 101 and the second semi-circular part 102 respectively and enters the hollow chamber, it is diverted by the guide plate 7 (inlet flow channel 8) at the inlet to the innermost arc-shaped flow channel of the labyrinth flow channel 9, and then is gradually diverted outward by the arc-shaped guide plate 4 to the outermost arc-shaped flow channel, and flows out through the heat-conducting medium outlet pipeline 2 near the end of the labyrinth flow channel 9, completing the uniform heating of the entire drying tray by the heat-conducting medium.

[0037] In other preferred embodiments of other parts, the inlet of the labyrinth flow channel is arranged inside the hollow chamber, and the outlet of the labyrinth flow channel is arranged outside the hollow chamber.

[0038] In other preferred embodiments of other parts, the arc-shaped hollow chamber is composed of a first semi-circular plate 10, a second semi-circular plate 11, a connecting plate 3, an inner peripheral plate 5 and an outer peripheral plate 12.

[0039] Combined Figure 2 、 Figure 3 As shown, the shape and size of the second semi-circular plate 11 match those of the first semi-circular plate 10. The second semi-circular plate 11 is located below the first semi-circular plate 10, that is, the first semi-circular plate 10 is the upper plate and the second semi-circular plate 11 is the lower plate. The guide plate 7 of the above inlet flow channel 8 and several arc-shaped guide plates 4 are all between the second semi-circular plate 11 and the first semi-circular plate 10, and are tightly connected to the lower surface of the first semi-circular plate 10 and the upper surface of the second semi-circular plate 11. While playing the role of diversion, the guide plate 7 and the arc-shaped guide plate 4 also play the role of strengthening the support.

[0040] The connecting plate 3 is fixed to the ends of the first semi-circular plate 10 and the second semi-circular plate 11. Through the connecting plate 3, the second semi-circular plate 11 and the first semi-circular plate 10 are connected up and down to form a semi-circular frame, and the ends of the semi-circular frame are closed through the connecting plate 3; at the same time, the connecting plate 3 also plays the role of connecting the first semi-circular part 101 and the second semi-circular part 102, that is, the first semi-circular part 101 and the second semi-circular part 102 are fixedly combined into an integral disc structure through the connecting plate 3.

[0041] The inner peripheral plate 5 is arranged around the inside of the arc-shaped frame to close the inside of the arc-shaped frame. As a preferred way, the inner peripheral plate 5 is arched.

[0042] The outer peripheral plate 12 is arranged around the outside of the arc-shaped frame to close the outside of the arc-shaped frame. As a preferred way, the outer peripheral plate 12 is arched.

[0043] A labyrinth flow channel 9 for the unidirectional circuitous flow of a heat-conducting medium is formed by a semi-circular frame, an arc-shaped guide plate 4, an inner enclosing plate 5, an outer enclosing plate 12, and a connecting plate 3.

[0044] The space formed by an inlet pipeline 1, a flow channel guide plate, a first semi-circular plate 10, a second semi-circular plate 11, and an outer enclosing plate 12 serves as an inlet flow channel 8.

[0045] In other preferred embodiments, refer to Figure 2 , Figure 3 As shown, a plurality of rib plates 6 are provided on the bottom surface of the integral disc structure, and the plurality of rib plates 6 are radially distributed with the center of the integral disc structure as the center. The rib plates 6 play a role in support and reinforcement. In specific implementation, the rib plates 6 are respectively connected to the outer enclosing plate 12, the second semi-circular plate 11, and the inner enclosing plate 5 and are uniformly installed on the bottom surface of the integral disc structure.

[0046] In other preferred embodiments, the connecting plate of the second semi-circular part 102 is connected to the connecting plate 3 of the first semi-circular part 101 through a connecting component, so that the second semi-circular part 102 and the first semi-circular part 101 are connected as a whole.

[0047] In other preferred embodiments, one end of the arc-shaped guide plate 4 is connected to the connecting plate 3 or the inner side surface of the inlet flow channel 8 to form a plurality of arc-shaped channels connected end to end; the upper end surface of the arc-shaped guide plate 4 is connected to the lower surface of the first semi-circular plate 10, and the lower end surface of the arc-shaped guide plate 4 is connected to the upper surface of the second semi-circular plate 11. As a preferred method, the upper end surface of the arc-shaped guide plate 4 is connected to the lower surface of the first semi-circular plate 10 by welding, and the lower end surface of the arc-shaped guide plate 4 is connected to the upper surface of the second semi-circular plate 11 by welding.

[0048] The drying disc for a disc dryer described in the above embodiments is applicable to vertical tower-type disc drying equipment for treating municipal sludge, oily sludge, livestock manure, etc., especially disc dryer equipment using liquids such as heat-conducting oil and hot water (heat-conducting medium) as heating heat sources. By improving the structure of the drying disc, the whole drying disc is spliced by two split semi-circular parts. At the same time, the use of a labyrinth flow channel can not only uniformly heat the materials on the drying disc, but also avoid thermal deformation of the drying disc caused by uneven heating, thereby reducing the frequency of shutdown maintenance for the deformed drying disc and rake blades.

[0049] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. A drying disc for a disc dryer, characterized in that, it includes: A first semi-circular part; A second semi-circular part, which forms an integral disc structure when paired with the first semi-circular part; The first semi-circular part and the second semi-circular part have the same structure, and both include: A hollow chamber in an arc shape, in which a number of arc-shaped guide plates are evenly spaced along the radial direction, and a one-way circuitous labyrinth flow path is formed by the number of arc-shaped guide plates and the inner wall of the hollow chamber; an inlet pipeline communicating with the inlet of the labyrinth flow path and an outlet pipeline communicating with the outlet of the labyrinth flow path are provided on the outer wall of the hollow chamber; The arc-shaped hollow chamber includes: A first semi-circular plate; A second semi-circular plate, the second semi-circular plate matches the shape and size of the first semi-circular plate, and the second semi-circular plate is arranged below the first semi-circular plate; A connecting plate, the connecting plate is arranged at the ends of the first semi-circular plate and the second semi-circular plate, and the second semi-circular plate is connected to the first semi-circular plate up and down through the connecting plate to form a semi-circular frame; An inner enclosing plate, the inner enclosing plate surrounds the inside of the arc-shaped frame to seal the inside of the arc-shaped frame; An outer enclosing plate, the outer enclosing plate surrounds the outside of the arc-shaped frame to seal the outside of the arc-shaped frame, that is, the arc-shaped hollow chamber is formed by the semi-circular frame, the inner enclosing plate, the connecting plate and the outer enclosing plate; An inlet flow path is provided in the arc-shaped hollow chamber, one end of the inlet flow path is communicated with the inlet pipeline, and the other end of the inlet flow path is communicated with the inlet of the labyrinth flow path; The inlet of the labyrinth flow path is arranged on the inner side of the hollow chamber, and the outlet of the labyrinth flow path is arranged on the outer side of the hollow chamber; The second semi-circular part and the first semi-circular part are connected into a whole through a connecting plate; one end of the arc-shaped guide plate is connected to the connecting plate or the inner side surface of the inlet flow path; the upper end surface of the arc-shaped guide plate is connected to the lower surface of the first semi-circular plate, and the lower end surface of the arc-shaped guide plate is connected to the upper surface of the second semi-circular plate; A step-by-step one-way flow path from the inside to the outside is formed between the number of arc-shaped guide plates and the inner wall of the hollow chamber. The heat-conducting medium respectively enters the one-way circuitous labyrinth flow path from the inlet flow paths on the inner sides of the hollow chambers of the first semi-circular part and the second semi-circular part, flows step by step from the inside to the outside along the radial direction, and finally is discharged from the outer outlet, forming a non-circulating one-way continuous circuitous flow path from the inside to the outside.

2. The drying disc for a disc dryer according to claim 1, characterized in that, the upper end surface of the arc-shaped guide plate is connected to the lower surface of the first semi-circular plate by welding, and the lower end surface of the arc-shaped guide plate is connected to the upper surface of the second semi-circular plate by welding.

3. The drying disc for a disc dryer according to any one of claims 1-2, characterized in that, a number of rib plates are provided on the bottom surface of the integral disc structure.

4. The drying disc for a disc dryer according to claim 3, characterized in that, The plurality of rib plates are radially distributed with the center of the integral disc structure as the center.

5. The drying disc for a disc dryer according to any one of claims 1-2, characterized in that both the inlet pipeline and the outlet pipeline are arranged on the outer edge of the hollow chamber.

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