Flash drying tower

Abstract

The utility model provides a flash drying tower. The flash drying tower comprises a tower body, wherein the tower body is provided with a drying space for drying materials; the air inlet device is located on one side of the tower body, the air inlet device is provided with a first air inlet channel and a second air inlet channel which are mutually independent, the first air inlet channel is provided with a first air outlet communicated with the drying space, and the second air inlet channel is provided with a second air outlet communicated with the drying space; the second air outlet is located on the outer side of the first air outlet and surrounds the first air outlet, so that air flowing into the drying space from the second air inlet channel flows along the inner wall face of the tower body, and an air barrier for preventing materials from adhering to the wall is formed. The flash drying tower solves the problem that the flash drying tower in the prior art cannot simultaneously take the material adhesion on the inner wall surface of the tower body and the drying uniformity into consideration.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, specifically to a flash drying tower. Background Technology

[0002] Flash drying technology has been widely used in various industries due to its advantages such as high drying efficiency and short drying time. As a key piece of equipment in the flash drying process, the internal structural design of the flash drying tower directly affects the drying effect. During flash drying, materials are rapidly dehydrated under the action of high temperature and high-speed airflow. However, materials tend to adhere to the inner wall of the flash drying tower during the drying process, especially when processing sticky materials, where adhesion is more severe. Adhered materials not only affect drying efficiency but may also lead to a decline in product quality, cleaning difficulties, and increased maintenance costs.

[0003] To address the issue of material adhesion, existing flash drying towers incorporate cooling inlets on both sides of the material inlet. Cooling media is introduced into the throat, flowing along its inner wall to prevent material adhesion and improve product quality. However, this method consumes some heat from the hot air, reducing energy efficiency, impacting drying performance, and compromising the uniformity of material drying.

[0004] In summary, existing flash drying tower technology has significant shortcomings in preventing material adhesion, avoiding equipment corrosion, improving the uniformity of drying effect, and energy utilization efficiency. It is necessary to find a more efficient, energy-saving technology that can ensure drying uniformity to overcome these deficiencies. Utility Model Content

[0005] The main objective of this invention is to provide a flash drying tower to solve the problem that existing flash drying towers cannot simultaneously achieve both material adhesion to the inner wall of the tower and uniform drying.

[0006] To achieve the above objectives, this utility model provides a flash drying tower, comprising: a tower body having a drying space for drying materials; and an air inlet device located on one side of the tower body, the air inlet device having a first air inlet channel and a second air inlet channel that are independent of each other, the first air inlet channel having a first air outlet communicating with the drying space, the second air inlet channel having a second air outlet communicating with the drying space, the second air outlet being located outside the first air outlet and surrounding the first air outlet, so that the air flowing into the drying space from the second air inlet channel flows along the inner wall of the tower body, forming an air barrier to prevent materials from sticking to the wall.

[0007] Furthermore, the inner wall of the tower is located outside the second air outlet and surrounds the second air outlet.

[0008] Furthermore, the air intake device also includes multiple baffles located within the second air intake channel, which divide the second air outlet into multiple sub-outlets.

[0009] Furthermore, multiple baffles are installed at equal intervals.

[0010] Furthermore, a portion of the second air intake duct is located between the first air intake duct and the tower body.

[0011] Furthermore, the flash drying tower also includes a stirring assembly, which is located on the same side of the tower body as the first air inlet channel, and a portion of the stirring assembly is located inside the first air inlet channel.

[0012] Furthermore, the air intake device includes: an air intake housing having an air intake cavity communicating with the drying space; and a partition located inside the air intake cavity, which divides the air intake cavity into a first air intake channel and a second air intake channel.

[0013] Furthermore, the partition includes: a first partition section, which is a cylindrical structure; and a second partition section, which is connected to the end of the first partition section away from the tower body, and extends in a direction away from the central axis of the cylindrical structure and is connected to the inner surface of the air inlet shell.

[0014] Furthermore, the air intake casing is volute-shaped.

[0015] Furthermore, the air intake device also includes at least two air volume regulating components, with at least one air volume regulating component respectively installed in the air inlet of the first air intake channel and the air inlet of the second air intake channel.

[0016] According to the technical solution of this utility model, the flash drying tower includes a tower body and an air inlet device. The tower body has a drying space for drying materials. The air inlet device is located on one side of the tower body and has a first air inlet channel and a second air inlet channel that are independent of each other. The first air inlet channel has a first air outlet that communicates with the drying space, and the second air inlet channel has a second air outlet that communicates with the drying space. The second air outlet is located outside the first air outlet and surrounds the first air outlet, so that the air flowing into the drying space from the second air inlet channel flows along the inner wall of the tower body, forming an air barrier to prevent materials from sticking to the wall.

[0017] By positioning the second air outlet outside and surrounding the first air outlet, the airflow entering the drying space through the second outlet becomes annular and flows along the inner wall of the tower, forming an airflow barrier on the inner wall. This effectively prevents materials from adhering to the inner wall during the drying process. Due to the dynamic pressure of the airflow, the material is pushed towards the center of the tower, avoiding direct contact with the inner wall, thus preventing material adhesion and clumping, and improving the quality of the dried material. The first air inlet directly delivers high-temperature, high-speed hot air into the drying space, ensuring full contact with the material and quickly removing moisture for efficient drying. Simultaneously, the second air inlet also introduces high-temperature, high-speed hot air into the drying space, forming an airflow barrier on the inner wall of the tower. This results in a more uniform distribution of the material within the drying space, increasing the opportunity and time for contact with hot air, further improving drying efficiency. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic diagram of a flash drying tower according to an optional embodiment of the present invention is shown;

[0020] Figure 2 It shows Figure 1 A schematic diagram showing the positional relationship between the first diaphragm section and the tower body at one angle;

[0021] Figure 3 It shows Figure 1 A schematic diagram showing the positional relationship between the central air intake device and the tower body from another angle.

[0022] The above figures include the following reference numerals:

[0023] 10. Tower body; 11. Drying space; 12. Feed inlet; 13. Inner wall; 20. Air inlet device; 21. First air inlet channel; 211. First air outlet; 22. Second air inlet channel; 221. Second air outlet; 23. Baffle plate; 24. Air inlet shell; 25. Baffle plate; 251. First baffle plate section; 252. Second baffle plate section; 30. Stirring assembly; 31. Stirring paddle. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0027] To address the problem that existing flash drying towers cannot simultaneously achieve both material adhesion to the inner wall of the tower and uniform drying, this invention provides a flash drying tower.

[0028] like Figures 1 to 3 As shown, the flash drying tower includes a tower body 10 and an air inlet device 20. The tower body 10 has a drying space 11 for drying materials. The air inlet device is located on one side of the tower body 10. The air inlet device 20 has a first air inlet channel 21 and a second air inlet channel 22 that are independent of each other. The first air inlet channel 21 has a first air outlet 211 that communicates with the drying space 11. The second air inlet channel 22 has a second air outlet 221 that communicates with the drying space 11. The second air outlet 221 is located outside the first air outlet 211 and surrounds the first air outlet 211, so that the air flowing into the drying space 11 from the second air inlet channel 22 flows along the inner wall surface 13 of the tower body 10, forming an air barrier to prevent materials from sticking to the wall.

[0029] By positioning the second air outlet 221 outside and surrounding the first air outlet 211, the airflow flowing into the drying space 11 through the second air outlet 221 is annular and flows along the inner wall surface 13 of the tower body 10, forming an airflow barrier on the inner wall surface 13 of the tower body 10. This effectively prevents materials from adhering to the inner wall surface 13 of the tower body 10 during the drying process. Due to the dynamic pressure of the airflow, the material is pushed towards the center of the tower body 10, avoiding direct contact with the inner wall surface 13 of the tower body 10, thereby preventing material adhesion and agglomeration, and improving the quality of the dried material. The first air inlet channel 21 directly delivers high-temperature, high-speed hot air into the drying space 11, ensuring full contact with the material and quickly removing moisture from the material, achieving efficient drying. Simultaneously, the second air inlet channel 22 also synchronously inputs high-temperature, high-speed hot air into the drying space 11, forming an airflow barrier on the inner wall surface 13 of the tower body 10. The distribution of the material within the drying space 11 is more uniform, and the opportunities and time for contact with hot air are increased, further improving drying efficiency.

[0030] Compared to existing technologies that use cooling media to reduce the local temperature of the tower body 10 and prevent material from sticking to the wall, the air barrier design of this utility model avoids the use of cooling media, reduces the waste of heat energy, lowers the overall energy consumption of the drying process, and improves energy utilization.

[0031] The independent design of the first air inlet channel 21 and the second air inlet channel 22 within the air inlet device 20 not only enables independent control of the drying hot air and the air barrier air, but also simplifies the equipment structure and reduces the complexity of maintenance and operation. Simultaneously, the spatial layout of the second air inlet channel 22 with the first air inlet channel 21 and the tower body 10 utilizes the internal space of the flash drying tower, making the air duct design more compact and reducing the overall size and cost of the equipment.

[0032] In addition, when handling materials containing corrosive components, the airflow barrier can effectively isolate the material from contact with the tower body 10, preventing corrosion of the tower body 10 and its internal structure, extending the service life of the equipment, and reducing the frequency of maintenance and replacement of parts.

[0033] In some alternative embodiments, please refer to Figure 1 The first air inlet channel 21 and the second air inlet channel 22 are located below the tower body 10. The airflow entering the drying space 11 through the second air inlet channel 22 forms an airflow barrier that flows upward along the inner wall surface 13 of the tower body 10, making it difficult for the material to fall down and preventing the material from falling to the bottom of the flash drying tower and forming material accumulation, thus making the drying effect more uniform.

[0034] like Figure 1 and Figure 3 As shown, the inner wall surface 13 of the tower body 10 is located outside and surrounds the second air outlet 221. This arrangement ensures that the air flowing out of the second air outlet 221 can flow accurately along the inner wall surface of the tower body 10, ensuring that the airflow flowing out of the second air outlet 221 can uniformly and tightly adhere to the inner wall surface 13 of the tower body 10, forming an effective air barrier to prevent material from sticking to the wall during the drying process. It also provides a certain degree of thermal insulation to avoid sudden drops in material temperature, thereby ensuring the continuity of the drying process and the uniformity of material drying.

[0035] Preferably, the inner wall surface 13 serves as the outer boundary of the second air outlet 221, or in other words, the orthographic projection of the inner wall surface 13 onto the first plane coincides with the outer boundary of the orthographic projection of the second air outlet 221 onto the first plane. The first plane is perpendicular to the tower body 10.

[0036] like Figure 2 and Figure 3As shown, the air inlet device 20 also includes multiple baffles 23 located within the second air inlet channel 22, dividing the second air outlet 221 into multiple sub-outlets. By setting baffles 23 within the second air inlet channel 22, the airflow can be evenly divided into multiple fine airflows, which enter the drying space 11 through the sub-outlets respectively. This results in a more uniform distribution of airflow along the inner wall 13 of the tower body 10, helping to form a continuous and stable air barrier and effectively preventing material from sticking to the wall. The multiple sub-outlets ensure a more stable distribution of airflow within the tower body 10. Compared to a single air outlet, the design of multiple sub-outlets reduces airflow turbulence and minimizes unstable fluctuations of airflow on the inner wall 13 of the tower body 10, thereby improving the stability and effectiveness of the air barrier.

[0037] By setting multiple baffles 23, the airflow distribution can be made more uniform, avoiding excessively high or low local wind speeds, which helps optimize the thermal energy utilization efficiency of the entire system. The uniform airflow distribution and enhanced air barrier function ensure that the material does not adhere to the inner wall 13 of the tower body 10 during the drying process, preventing material deformation and quality degradation caused by localized overheating or overcooling. Simultaneously, the uniformly distributed airflow helps the material to disperse evenly within the drying space 11, preventing localized material accumulation and ensuring sufficient contact between the material and hot air, thus improving drying efficiency. Furthermore, the baffles 23 can guide the airflow direction, making it more closely conform to the inner wall 13 of the tower body 10, further enhancing the drying of the material.

[0038] It should be noted that a portion of the multiple sub-outlets can be connected. For example, one end of the baffle 23 can be connected to the inner wall surface 13, while the baffle 23 and the first baffle section 251 are spaced apart; or one end of the baffle 23 can be connected to the first baffle section 251, while the baffle 23 and the inner wall surface 13 are spaced apart. Alternatively, the multiple sub-outlets can be independent of each other. For example, both ends of the baffle 23 can be connected to the inner wall surface 13 and the first baffle section 251 respectively, to divide the second air outlet 221 into multiple independent sub-outlets.

[0039] like Figure 3As shown, multiple baffles 23 are arranged at equal intervals. The equally spaced baffles 23 ensure that the second air outlet 221 is uniformly divided into multiple sub-outlets. This allows the airflow entering the drying tower from the second air inlet channel 22 to be more evenly distributed across the entire inner wall surface 13 of the tower body 10, forming a uniform air barrier surrounding the drying space 11. This uniform airflow distribution helps to evenly disperse the material during the drying process, avoiding uneven drying and wall adhesion caused by excessive material concentration in certain areas. The equally spaced distribution of the baffles 23 stabilizes the angle and speed of the airflow entering the drying space 11, reducing interference between airflows and making the air barrier more stable. This helps to keep the inner wall surface 13 of the tower body 10 clean, preventing material adhesion, thereby improving drying efficiency and the quality of material drying.

[0040] like Figure 1 As shown, a portion of the second air inlet channel 22 is located between the first air inlet channel 21 and the tower body 10. This arrangement helps the second air outlet 221 to adhere closely to the inner wall surface 13 of the tower body 10, allowing the airflow to flow more tightly along the inner wall surface 13 of the tower body 10, thus creating a uniform and strong air barrier. This air barrier effectively prevents materials from adhering to the inner wall surface 13 of the tower body 10 during the drying process, avoiding material accumulation and improving the uniformity and efficiency of material drying. Furthermore, placing a portion of the second air inlet channel 22 between the first air inlet channel 21 and the tower body 10 results in a more compact overall structure of the air inlet device 20, which helps reduce the footprint of the air inlet device 20 and improves space utilization efficiency.

[0041] like Figure 1 As shown, the flash drying tower also includes a stirring assembly 30, which is located on the same side of the tower body 10 as the first air inlet channel 21, with a portion of the stirring assembly 30 located within the first air inlet channel 21. The stirring paddle 31 of the stirring assembly 30 is located within the first air inlet channel 21. Thus, when hot air is introduced into the first air inlet channel, the high-speed rotating stirring paddle 31 creates a strong upward-rotating airflow, which more fully and immediately disperses the material. This design allows the material to be quickly broken up and homogenized in the initial stage of entering the drying space 11, thereby ensuring full contact with the hot air, accelerating the evaporation rate of moisture, and significantly improving drying efficiency. Although the material rotates with the strong upward-rotating airflow, under the action of the second air inlet channel 22, the material is less likely to adhere to the inner wall surface 13 of the tower body 10.

[0042] like Figure 1As shown, the air inlet device 20 includes an air inlet housing 24 and a partition 25. The air inlet housing 24 has an air inlet cavity that communicates with the drying space 11. The partition 25 is located inside the air inlet cavity and divides the air inlet cavity into a first air inlet channel 21 and a second air inlet channel 22. The cooperation between the partition 25 and the air inlet housing 24 simplifies the structure of the air inlet device 20, making the manufacturing and installation of the equipment more convenient. At the same time, it realizes two air inlets: one directly enters the drying space 11, and the other forms an air barrier to prevent material adhesion.

[0043] like Figure 1 As shown, the partition 25 includes a first partition section 251 and a second partition section 252. The first partition section 251 is a cylindrical structure. The second partition section 252 extends from the end of the first partition section 251 away from the tower body 10 toward the central axis opposite to the cylindrical structure and connects to the inner surface of the air inlet shell 24. The first air outlet 211 is located inside the first partition section 251, and the second air outlet 221 is located outside the first partition section 251. The arrangement of the first partition section 251 causes the second air outlet 221 to surround the first air outlet 211, so that the airflow entering the drying space 11 through the second air outlet 221 flows along the inner wall surface 13 of the tower body 10 to form an air barrier and prevent material adhesion.

[0044] In some alternative embodiments, please refer to Figure 3 The air inlet casing 24 is volute-shaped. This volute structure allows for smooth airflow introduction, reducing turbulence and resistance during entry. It also guides the airflow along a curved path within the casing, minimizing energy loss during straight entry. The airflow gradually accelerates inside the volute, ultimately entering the drying tower at high speed and uniformly, enabling more efficient heat transfer to the materials, reducing energy consumption, and improving energy utilization efficiency.

[0045] Furthermore, when the volute-shaped air inlet housing 24 is used in conjunction with the stirring assembly 30, it can better coordinate with the rotational movement of the stirring assembly 30. When hot air enters through the volute-shaped channel, it can be evenly distributed along the axial direction of the tower body 10, interacting with the airflow generated by the stirring assembly 30 to enhance the crushing and dispersion of materials, ensuring the uniformity of materials during the drying process.

[0046] The air inlet housing 24 is configured as a volute, and the first air inlet channel 21 is also volute-shaped, so that air can enter at a 90° angle along the volute structure. Simultaneously, it works in conjunction with the high-speed rotating agitator 31 to form a powerful upward rotating airflow. The second air inlet channel 22 is also a volute-shaped structure, allowing air to enter at a 90° angle. Under the combined action of the first baffle section 251 and the baffle plate 23, an upward airflow is formed along the inner wall surface 13 of the tower body 10. This airflow forms an annular air barrier along the inner wall surface 13 of the tower body 10, preventing material from contacting the inner wall surface 13 of the tower body 10, thus preventing material from sticking to the inner wall surface 13 of the tower body 10 and improving product quality. This process does not involve the introduction of a cooling medium, avoiding heat waste.

[0047] In some alternative embodiments, the air inlet device 20 further includes at least two airflow regulators (not shown in the figure), with at least one airflow regulator installed in the air inlet of the first air inlet channel 21 and the air inlet of the second air inlet channel 22, respectively. The airflow regulators allow the airflow of the first air inlet channel 21 and the second air inlet channel 22 to be adjusted independently. By adjusting the airflow of the first air inlet channel 21, the flow rate and speed of the hot air can be controlled, optimizing the heat distribution within the drying space 11 and ensuring optimal temperature control of the material during the drying process. Simultaneously, by adjusting the airflow of the second air inlet channel 22, the strength of the air barrier can be enhanced or weakened, preventing material from adhering to the inner wall 13 of the tower body 10, further improving drying efficiency and uniformity. The use of airflow regulators helps reduce energy consumption. Operators can adjust the airflow according to actual needs, avoiding excessive hot air or wasted airflow, especially in the early stages of the drying process when the material quantity is small; reducing the airflow of the first air inlet channel 21 can effectively reduce energy waste.

[0048] In this flash drying tower, during operation, the material enters the drying space 11 through the flash feed inlet 12 on the tower body 10 for drying. Simultaneously, the air inlet device 20 is activated, and hot air enters the drying space through the first air inlet channel 21 and the second air inlet channel 22. The hot air entering through the first air inlet channel 21, under the action of the stirring assembly 30, forms a strong upward rotating airflow. The hot air entering through the second air inlet channel 22 flows upward along the inner wall surface 13 of the tower body 10, forming an air barrier. This not only accelerates the vertical transport of the material but also isolates the material from the inner wall surface 13 of the tower body 10, preventing sticky materials from adhering to the inner wall surface 13. It also reduces the corrosion of the tower body 10 by acidic or alkaline corrosive substances in the material.

[0049] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0050] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0051] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. 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.

Claims

1. A flash drying tower, characterized in that, include: The tower body (10) has a drying space (11) for drying materials; An air inlet device (20) is located on one side of the tower body (10). The air inlet device (20) has a first air inlet channel (21) and a second air inlet channel (22) that are independent of each other. The first air inlet channel (21) has a first air outlet (211) that communicates with the drying space (11). The second air inlet channel (22) has a second air outlet (221) that communicates with the drying space (11). The second air outlet (221) is located outside the first air outlet (211) and surrounds the first air outlet (211) so that the air flowing into the drying space (11) from the second air inlet channel (22) flows along the inner wall surface (13) of the tower body (10) to form an air barrier to prevent materials from sticking to the wall.

2. The flash drying tower according to claim 1, characterized in that, The inner wall surface (13) of the tower body (10) is located outside the second air outlet (221) and surrounds the second air outlet (221).

3. The flash drying tower according to claim 1, characterized in that, The air inlet device (20) also includes a plurality of baffles (23), which are located in the second air inlet channel (22) and divide the second air outlet (221) into a plurality of sub-air outlets.

4. The flash drying tower according to claim 3, characterized in that, Multiple baffles (23) are arranged at equal intervals.

5. The flash drying tower according to claim 1, characterized in that, A portion of the second air inlet channel (22) is located between the first air inlet channel (21) and the tower body (10).

6. The flash drying tower according to claim 1, characterized in that, The flash drying tower also includes a stirring assembly (30), which is located on the same side of the tower body (10) as the first air inlet channel (21), and a part of the stirring assembly (30) is located inside the first air inlet channel (21).

7. The flash drying tower according to any one of claims 1 to 6, characterized in that, The air intake device (20) includes: An air inlet housing (24) has an air inlet cavity that is connected to the drying space (11); A partition (25) is located inside the air inlet cavity, and the partition (25) divides the air inlet cavity into a first air inlet channel (21) and a second air inlet channel (22).

8. The flash drying tower according to claim 7, characterized in that, The partition (25) includes: The first partition section (251) is a cylindrical structure; The second partition section (252) is connected to the end of the first partition section (251) away from the tower body (10), and the second partition section (252) extends in a direction away from the central axis of the cylindrical structure and is connected to the inner surface of the air inlet housing (24).

9. The flash drying tower according to claim 7, characterized in that, The air intake housing (24) is volute-shaped.

10. The flash drying tower according to claim 7, characterized in that, The air intake device (20) further includes at least two air volume regulating components, and at least one of the air volume regulating components is respectively provided in the air inlet of the first air intake channel (21) and the air inlet of the second air intake channel (22).

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