Redispersible latex powder spray drying device
By designing a spray drying device, which utilizes structures such as a heating box and a rotating shaft, the uniform dispersion and multi-angle spraying of hot air are achieved, solving the problem of low efficiency in single hot air drying and improving the drying efficiency and product quality of latex powder.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-03-31
AI Technical Summary
The existing single hot air drying method for redispersible latex powder results in low drying efficiency, which cannot meet the needs of large-scale production, and it is difficult to ensure uniform heating of latex powder and product quality stability.
The spray drying device includes a tank, a feed pipe, an atomizer, a first drying component, and a second drying component. Through structural design such as a heating box, a rotating shaft, and jet holes, it achieves uniform dispersion and multi-angle spraying of hot air, thereby increasing the contact area between hot air and materials and improving drying efficiency.
It improves drying efficiency, ensures uniform heating of latex powder, enhances product quality, meets the needs of large-scale production, and avoids problems of localized over- or under-drying.
Smart Images
Figure CN224056676U_ABST
Abstract
Description
Technical Field
[0001] The embodiments disclosed herein relate to the technical field of spray drying apparatus, specifically to a spray drying apparatus for redispersible latex powder. Background Technology
[0002] Redispersible latex powder is widely used in industries such as building materials and coatings, and its quality and performance have a significant impact on product effectiveness. Currently, the drying process for redispersible latex powder mostly employs a single drying method, typically simple hot air drying. This method has revealed many problems in practical applications, with low drying efficiency being the most prominent.
[0003] Hot air drying alone relies on hot air to transfer heat, resulting in a slow drying process with a significant amount of time spent on moisture evaporation, which cannot meet the needs of large-scale production. Moreover, this drying method makes it difficult to ensure uniform heating of the latex powder, easily leading to localized over-drying or under-drying, affecting the stability of product quality.
[0004] Furthermore, single drying methods lack flexibility and are difficult to adjust according to the characteristics of latex powder and production needs. As the market's requirements for the yield and quality of redispersible latex powder continue to increase, the drawbacks of traditional single drying methods are becoming increasingly apparent. There is an urgent need for an innovative drying device to improve drying efficiency, ensure product quality, and adapt to the pace of modern production.
[0005] Therefore, improvements have been made to address the aforementioned issues. Utility Model Content
[0006] To overcome the above-mentioned defects, the embodiments of this disclosure provide a spray drying device for redispersible latex powder, which solves the technical problem that the existing single hot air drying relies on the transfer of heat by hot air, the drying process is slow, a lot of time is spent on moisture evaporation, and it cannot meet the needs of large-scale production.
[0007] According to one aspect, at least one embodiment of the present disclosure provides a spray drying apparatus for redispersible latex powder, comprising:
[0008] The tank body, the feed pipe, and the atomizer are provided, wherein the feed pipe is connected to the top of the tank body and the atomizer is located at the lower end of the feed pipe.
[0009] A first drying assembly is disposed at the top of the tank;
[0010] The inner frame and the second drying assembly are provided. The inner frame is disposed inside the tank and one end of the inner frame is located outside the tank. The second drying assembly is disposed on the inner frame.
[0011] The first drying component includes a top cover, which is disposed on the top of the tank. The top of the tank has a plurality of air inlets connected to the interior of the top cover. A heating box is disposed on the top of the tank.
[0012] As a further technical solution, one side of the heating box is connected to the top cover, the heating box is provided with several partitions, the heating box is provided with several heating tubes, and the side surface of the heating box is provided with an air inlet pipe.
[0013] As a further technical solution, the second drying component includes a rotating shaft, which is rotatably connected to the inner frame. Several outer rods are provided at the upper end of the rotating shaft, and the outer rods and the interior of the rotating shaft are provided with cavities.
[0014] As a further technical solution, the outer rod surface is provided with a number of air jet holes, which are connected to the interior of the cavity. An air intake cover is rotatably mounted on the rotating shaft, and a number of air vents are provided around the inner surface of the air intake cover and around the outer surface of the rotating shaft.
[0015] As a further technical solution, a connecting pipe is provided on one side of the air intake hood, a drive motor is provided outside the inner frame, and a transmission wheel is provided on both the output end of the drive motor and the rotating shaft. The transmission wheels are connected by belt drive, and a spiral blade is provided at the lower end of the rotating shaft.
[0016] As a further technical solution, several of the partitions are arranged and connected in a staggered manner inside the heating box.
[0017] As a further technical solution, the outer end face of the spiral blade is slidably attached to the inner wall of the tank.
[0018] As a further technical solution, the air intake cover is sealed and slidably fitted to the surface of the rotating shaft.
[0019] As a further technical solution, the top cover has a ring-shaped structure, and the air inlet is a uniform ring-shaped portion inside the top cover.
[0020] As a further technical solution, several of the outer rods are distributed in a herringbone pattern.
[0021] The beneficial effects of the embodiments disclosed herein are as follows:
[0022] 1. In this disclosure, the beneficial effect of the first drying component is that the heating tubes and staggered partitions in the heating chamber enhance the heating effect of the hot air, making the hot air temperature higher. The top cover and the uniformly distributed annular air inlets ensure that the hot air can be evenly dispersed into the tank, providing a stable and uniform thermal environment for the atomized latex powder and improving the drying efficiency.
[0023] 2. In this disclosure, the beneficial effects of the second drying component are that the rotating shaft drives the outer rod and the jet hole to rotate, so that the hot air is sprayed in all directions and at multiple angles, which increases the contact area between the hot air and the material. The herringbone-shaped distribution of the outer rod makes the hot air distribution more uniform, further improving the drying effect. The sealed sliding fit of the air inlet cover avoids hot air leakage and ensures a stable supply of hot air. The spiral blades can also prevent undried material residue while conveying the dried latex powder, thus improving product quality. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.
[0025] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;
[0026] Figure 2 This is an isometric drawing of the present disclosure;
[0027] Figure 3 This is an isometric sectional view of the present disclosure;
[0028] Figure 4 Appendix to this disclosure Figure 3 Enlarged view of part A in the middle;
[0029] In the diagram: 1. Tank body; 2. Feed pipe; 3. Atomizer; 4. Inner frame; 5. First drying assembly; 5-1. Top cover; 5-2. Air inlet; 5-3. Heating box; 5-4. Baffle; 5-5. Heating tube; 5-6. Air inlet pipe; 6. Second drying assembly; 6-1. Rotating shaft; 6-2. Outer rod; 6-3. Cavity; 6-4. Jet nozzle; 6-5. Air inlet hood; 6-6. Vent; 6-7. Connecting pipe; 6-8. Drive motor; 6-9. Transmission wheel; 6-10. Spiral blades. Detailed Implementation
[0030] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.
[0031] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0032] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0033] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can 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 top" of the second 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 second 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.
[0034] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this disclosure.
[0035] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0036] like Figures 1-4 As shown, it illustrates a redispersible latex powder spray drying apparatus according to an embodiment of the present disclosure, comprising:
[0037] Tank 1, feed pipe 2 and atomizer 3, the feed pipe 2 is connected to the top of the tank 1 and the atomizer 3 is located at the lower end of the feed pipe 2;
[0038] First drying component 5, which is disposed on the top of tank 1;
[0039] The inner frame 4 and the second drying component 6 are provided. The inner frame 4 is located inside the tank 1, and one end of the inner frame 4 is located outside the tank 1. The second drying component 6 is located on the inner frame 4.
[0040] The first drying assembly 5 includes a top cover 5-1, which is located on the top of the tank body 1. The top of the tank body 1 has several air inlets 5-2, which are connected to the interior of the top cover 5-1. A heating box 5-3 is located on the top of the tank body 1. One side of the heating box 5-3 is connected to the top cover 5-1. Several partitions 5-4 are installed inside the heating box 5-3. Several heating tubes 5-5 are installed inside the heating box 5-3. An air inlet pipe 5-6 is installed on the side surface of the heating box 5-3.
[0041] In some examples, to achieve the drying effect by supplying hot air to the inside of the tank 1, a first drying component 5 is designed. This component includes a top cover 5-1, which is located on top of the tank 1 and serves as a transition structure for the hot air to enter the tank 1, collecting and distributing the hot air. Several air inlets 5-2 on the top of the tank 1 are connected to the inside of the top cover 5-1, providing channels for the hot air to enter the tank 1 and allowing the hot air to be evenly distributed inside the tank 1. The heating box 5-3 located on top of the tank 1 is the main structure for generating hot air. -3 is connected to the top cover 5-1 on one side. The heating box 5-3 is equipped with several partitions 5-4 and heating tubes 5-5. Their function is to change the flow path of hot air in the heating box 5-3 and increase the contact time between hot air and heating tubes 5-5, thereby improving the heating effect of hot air. The heating tubes 5-5 in the heating box 5-3 are the source of heat generation. When current passes through the heating tubes 5-5, the heating tubes 5-5 heat up and heat the surrounding air into hot air. The air inlet pipe 5-6 on the side surface of the heating box 5-3 is used to introduce outside air.
[0042] like Figures 1-4As shown, this embodiment proposes a second drying component 6 including a rotating shaft 6-1, which is rotatably connected to the inner frame 4. Several outer rods 6-2 are provided at the upper end of the rotating shaft 6-1. A cavity 6-3 is opened between the outer rods 6-2 and the interior of the rotating shaft 6-1. Several air jet holes 6-4 are opened on the surface of the outer rods 6-2, and the air jet holes 6-4 are connected to the interior of the cavity 6-3. An air inlet hood 6-5 is rotatably fitted onto the rotating shaft 6-1. Several air vents 6-6 are opened around the inner surface of the air inlet hood 6-5 and around the outer surface of the rotating shaft 6-1. A connecting pipe 6-7 is provided on one side of the air inlet hood 6-5. A drive motor 6-8 is provided outside the inner frame 4. A transmission wheel 6-9 is provided at the output end of the drive motor 6-8 and on the rotating shaft 6-1. The transmission wheels 6-9 are connected by belt drive. A spiral blade 6-10 is provided at the lower end of the rotating shaft 6-1.
[0043] In some examples, to further enhance the drying effect inside the tank 1, a second drying assembly 6 is designed. This assembly includes a rotating shaft 6-1 rotatably connected to the inner frame 4. Several outer rods 6-2 are provided at the upper end of the rotating shaft 6-1, and a cavity 6-3 is opened inside the rotating shaft 6-1 to receive hot air. Several air jet holes 6-4 are opened on the surface of the outer rods 6-2, which are connected to the inside of the cavity 6-3, so that hot air can be evenly sprayed around the material in the spray drying tank through the air jet holes 6-4, increasing the contact area between the hot air and the material and improving the drying efficiency. An air inlet hood 6-5 is rotatably fitted onto the rotating shaft 6-1, which is the inlet for hot air to enter the cavity 6-3 inside the rotating shaft 6-1. Several air vents 6-6 are opened around the inner surface of the air inlet hood 6-5 and around the outer surface of the rotating shaft 6-1. When hot air is introduced into the air hood 6-5, the hot air can enter the cavity 6-3 of the rotating shaft 6-1 through these air vents 6-6, and then be ejected through the jet nozzle 6-4. The connecting pipe 6-7 set on one side of the air hood 6-5 is used to connect to the external equipment that provides hot air to ensure a continuous supply of hot air. The drive motor 6-8 set on the outside of the inner frame 4 provides power for the rotation of the rotating shaft 6-1. The output end of the drive motor 6-8 and the rotating shaft 6-1 are both equipped with transmission wheels 6-9, which are connected by belt drive. This transmission method can stably transmit the power of the drive motor 6-8 to the rotating shaft 6-1, causing the rotating shaft 6-1 to rotate. As the rotating shaft 6-1 rotates, the outer rod 6-2 and the jet nozzle 6-4 also rotate, so that the hot air can be sprayed onto the material from all directions and at multiple angles, further enhancing the drying effect.
[0044] For example, such as Figure 3 As shown, several partitions 5-4 are staggered and connected to each other inside the heating box 5-3.
[0045] In some examples, the staggered distribution creates an S-shaped ventilation path inside, enhancing the heating effect.
[0046] For example, such as Figure 3 As shown, the outer end face of the spiral blade 6-10 slides and fits against the inner wall of the tank 1.
[0047] In some examples, by sliding and fitting together to reduce the gap, the high-speed rotating helical blades 6-10 can orderly convey the dried material outward.
[0048] For example, such as Figure 4 As shown, the air intake shroud 6-5 is connected to the rotating shaft 6-1 in a sealed sliding fit.
[0049] In some examples, the sealing and sliding fit effect is used to prevent air leakage and avoid affecting the transmission structure.
[0050] For example, such as Figure 3 As shown, the top cover 5-1 has a ring-shaped structure, and the air inlet 5-2 has a uniform ring-shaped portion inside the top cover 5-1.
[0051] In some examples, the annular structure allows the incoming gas to disperse downwards and cover the surrounding area, increasing the coverage effect of the hot gas.
[0052] For example, such as Figure 3 As shown, several outer rods 6-2 are distributed in a herringbone pattern.
[0053] In some examples, the herringbone-shaped limiting distribution ensures that the outer rod 6-2 is evenly distributed, and the high-speed rotation further enhances the uniformity of gas distribution.
[0054] In actual use: the redispersible latex powder is conveyed to the atomizer 3 through the feed pipe 2. The atomizer 3 atomizes the latex powder and sprays it into the tank 1. The heating box 5-3 is started. The air inlet pipe 5-6 is connected to the fan, and the outside air enters the heating box 5-3 through the air inlet pipe 5-6. The heating tube 5-5 heats the air. The baffle 5-4 makes the hot air form an S-shaped flow path to enhance the heating effect. The hot air enters the tank evenly through the air inlet 5-2 of the top cover 5-1 to perform preliminary drying of the atomized latex powder. At the same time, the drive motor 6-8 drives the rotating shaft 6-1 to rotate through the belt drive. The air inlet hood 6-5 introduces the external hot air, which enters the cavity 6-3 of the rotating shaft 6-1 through the air vent 6-6 and is then sprayed out from the jet hole 6-4. The outer rod 6-2 is distributed in a herringbone pattern to make the hot air spray evenly. The spiral blades 6-10 convey the dried latex powder out of the tank 1.
[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.
Claims
1. A re-dispersible latex powder spray drying apparatus characterized by, It includes: The tank body (1), the feed pipe (2) is connected in the tank body (1) top, and the atomizer (3) is arranged in the lower end of the feed pipe (2); The first drying assembly (5) is arranged on the top of the tank body (1); The inner frame (4) is arranged inside the tank body (1), one end of the inner frame (4) is located outside the tank body (1), and the second drying assembly (6) is arranged on the inner frame (4); The first drying assembly (5) includes a top cover (5-1) arranged on the top of the tank body (1), a plurality of air inlets (5-2) are formed on the top of the tank body (1), the air inlets (5-2) are communicated with the inside of the top cover (5-1), and a heating box (5-3) is arranged on the top of the tank body (1).
2. A re-dispersible latex powder spray drying apparatus according to claim 1, wherein, One side of the heating box (5-3) is communicated with the top cover (5-1), a plurality of partitions (5-4) are arranged in the heating box (5-3), a plurality of heating pipes (5-5) are arranged in the heating box (5-3), and an air inlet pipe (5-6) is arranged on the side surface of the heating box (5-3).
3. A re-dispersible latex powder spray drying apparatus according to claim 1, wherein, The second drying assembly (6) includes a rotating shaft (6-1) rotatably connected in the inner frame (4), a plurality of outer rods (6-2) are arranged on the upper end of the rotating shaft (6-1), and a cavity (6-3) is formed in the inner shaft (6-1) and the outer rod (6-2).
4. A re-dispersible latex powder spray drying apparatus according to claim 3, wherein, A plurality of air injection holes (6-4) are formed on the surface of the outer rod (6-2), the air injection holes (6-4) are communicated with the inside of the cavity (6-3), an air inlet cover (6-5) is rotatably connected on the rotating shaft (6-1), a plurality of air vents (6-6) are formed on the inner surface of the air inlet cover (6-5) and the outer surface of the rotating shaft (6-1).
5. A re-dispersible latex powder spray drying apparatus according to claim 4, wherein, One side of the air inlet cover (6-5) is provided with a connecting pipe (6-7), the outer portion of the inner frame (4) is provided with a driving motor (6-8), the output ends of the driving motor (6-8) and the rotating shaft (6-1) are provided with transmission wheels (6-9), the transmission wheels (6-9) are connected by a belt transmission, and the lower end of the rotating shaft (6-1) is provided with a spiral blade (6-10).
6. A re-dispersible latex powder spray drying apparatus according to claim 2, wherein, A plurality of partitions (5-4) are arranged in the heating box (5-3) and are distributed in the upper and lower positions.
7. A re-dispersible latex powder spray drying apparatus according to claim 5, wherein, The outer end surface of the spiral blade (6-10) is slidably attached to the inner wall of the tank body (1).
8. A re-dispersible latex powder spray drying apparatus according to claim 4, wherein, The air inlet cover (6-5) and the surface of the rotating shaft (6-1) are sealingly and slidably attached.
9. A re-dispersible latex powder spray drying apparatus according to claim 1, wherein, The top cover (5-1) is in a circular ring structure, and the air inlets (5-2) are in a circular ring structure and are evenly arranged in the top cover (5-1).
10. A re-dispersible latex powder spray drying apparatus according to claim 3, wherein, A plurality of outer rods (6-2) are arranged in a herringbone shape.