A multi-stage cascade spray drying tower
By installing a vibration device and a pusher brush inside the drying tower, the material is effectively conveyed in the multi-stage series spray drying tower, solving the problem of material residue and improving drying efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUZHONG WANGQI BIOTECHNOLOGY CO LTD
- Filing Date
- 2024-09-20
- Publication Date
- 2026-07-10
AI Technical Summary
In existing multi-stage series spray drying towers, the rake blades cannot prevent material residue from remaining on the heating plate, resulting in low drying efficiency and unstable product quality.
A vibration device is installed inside the drying tower. The drive motor drives the transmission shaft and transmission rod to rotate. The wave structure of the rollers and ring makes the drying trays move vertically back and forth. Combined with the pusher brush and pre-compression device, the material is effectively conveyed.
This solved the problem of material residue, improved drying efficiency and product quality, prevented materials from scorching on the heating plates, and ensured smooth material transfer between drying plates at each level.
Smart Images
Figure CN224474703U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of drying towers, and more particularly to a drying tower with multi-stage series spray. Background Technology
[0002] The working principle of a multi-stage series spray drying tower is based on spray drying technology. Through a multi-stage series design, a more complex and refined drying process is achieved. Specifically, the liquid material first passes through a filter to remove impurities and particles, ensuring the purity and flowability of the material. Subsequently, the filtered air is heated to a certain temperature to improve the drying effect and the quality of the powder or granules. The heated air enters the drying chamber evenly in a spiral shape through an air distributor at the top of the drying tower. The liquid material is then sprayed into very fine mist droplets by a high-speed centrifugal atomizer or high-pressure atomizer at the top of the tower. These atomized droplets come into full contact with the hot air, rapidly drying and removing moisture from the surface of the powder in a very short time. After passing through multiple drying trays, the moisture inside the powder is gradually removed, and finally, the powder is dried into a granular finished product.
[0003] Currently used multi-stage series drying towers often directly convey materials to heating plates, utilizing the heat from the plates for drying. Then, devices such as rakes or scrapers are used to move the material from the heating plates to the next stage. However, during the rake turning of the material, due to the gaps between the rakes, material inevitably remains on the heating plates. Furthermore, because the material is initially in droplet form, its dryness is difficult to control upon initial contact with the heating plates. The heating plates cannot directly generate heat; the heat they carry is conducted through the hot air introduced into the drying tower. Therefore, the temperature on the heating plates is difficult to control. When the material is not sufficiently dry, it easily adheres to the heating plates or, after being scraped by the rakes, flows into the next stage drying plate as a liquid, affecting drying efficiency. When the material is over-dryed, it is prone to scorching during subsequent grading and drying, affecting the quality of the final product. Utility Model Content
[0004] The purpose of this invention is to solve the problem in the prior art that the rake blades of multi-stage series spray drying towers cannot prevent material residue on the heating plate.
[0005] To achieve the above objectives, this application proposes a multi-stage series spray drying tower, comprising: a tower top; a tower body; a tower bottom; a base; and a vibration device installed on the drying tower; wherein the vibration device comprises: a drive motor installed at the bottom of the tower bottom; a transmission shaft connected to the output shaft of the drive motor via a coupling; a pre-compression device installed on the transmission shaft and located at the bottom of the tower; a transmission rod connected to the end of the transmission shaft and extending towards the tower top; a roller installed at the end of the transmission rod; and an annular body attached to the roller and installed on the inner wall of the tower top.
[0006] The multi-stage series spray drying tower of this application incorporates a vibration device within the drying tower. A drive motor rotates a transmission shaft, which in turn rotates a transmission rod connected to the shaft. Simultaneously, rollers drive the transmission rod to move vertically along the ring. During this process, the pre-compression device is stressed, causing the first drying disc connected to it to reciprocate vertically. This, in turn, causes the support frame and second drying disc connected to it to reciprocate vertically. This alters the position of material remaining on the drying discs, allowing it to be conveyed to the next stage of the drying unit by a pusher brush. This solves the problem in existing multi-stage series spray drying towers where the rake blades cannot prevent material residue on the heating discs.
[0007] As an improvement to the aforementioned ring body in this application, in order to enable the vibration device to effectively cause the drying tray to reciprocate in the vertical direction, the end face of the ring body perpendicular to the side wall of the tower and away from the top of the tower is set as a wave structure, that is, it has wave crests and troughs.
[0008] As an improvement to the aforementioned transmission rod in this application, in order to make the reciprocating motion of the drying tray in the vertical direction more stable, the side supports of the transmission rod are arranged symmetrically, and the extension direction is: first extending horizontally to a position close to the inner wall of the tower, and then extending vertically towards the top of the tower until it reaches directly below the ring.
[0009] Furthermore, in order to transmit the movement of the transmission rod along the end face of the ring to the drying tray, a pre-compression device is set at the junction of the tower body and the tower bottom. When the roller is close to the trough of the ring, the pre-compression device is in a compressed state, and when the roller is close to the crest of the ring, the pre-compression device is in a maximum compressed state.
[0010] Furthermore, in order to improve the drying efficiency of the material and ensure the quality of the dried product, the drying tower also includes: a preliminary drying chamber located near the top of the tower body, and a grading drying chamber located near the bottom of the tower body. The grading drying chamber is provided with at least two first drying discs protruding towards the top of the tower, a first drying disc recessed towards the top of the tower between adjacent first drying discs, and a support frame along the inner wall of the tower body. A support block is provided between the support frame and the bottom surface of the first drying discs. A pusher rod with one end connected to a drive shaft and the other end extending to the edge of the first drying disc is also provided. A pusher brush that is in close contact with the upper surface of the first drying disc is provided between the pusher rod and the first drying disc.
[0011] Furthermore, in order to enable graded drying of materials, the radial dimension of the first drying disc is smaller than that of the second drying disc, and the center of the second drying disc has a through hole larger than the diameter of the drive shaft.
[0012] As an improvement to the pre-compression device described in this application, in order to enable the drying tray to reciprocate in the vertical direction relative to the drive shaft, the pre-compression device includes: an inner sleeve with its end welded to the drive shaft; an outer sleeve covering the inner sleeve and with one end welded to the bottom surface of the first drying tray at the bottommost end; and a spring installed in the inner sleeve and the outer sleeve, with its two ends connected to the bottom surface of the inner sleeve and the top surface of the outer sleeve, respectively.
[0013] Furthermore, in order to ensure that the pusher brush always stays in contact with the drying tray when the drying tray is reciprocating in the vertical direction, a tension spring is installed between the acute angle formed by the pusher rod and the drive shaft.
[0014] The beneficial effects of this application are as follows:
[0015] 1. The multi-stage series spray drying tower of this application, by setting a vibration device inside the drying tower, wherein the drive motor drives the transmission shaft to rotate, thereby driving the transmission rod connected to the transmission shaft to rotate, and at the same time, the transmission rod is driven by rollers to move vertically along the ring. At this time, the pre-compression device is subjected to force, driving the first drying tray connected to it to move vertically reciprocating, thereby driving the support frame and the second drying tray connected to it to move vertically reciprocating, thereby changing the position of the material remaining on the drying tray, which can be conveyed to the next stage drying device by the pusher brush. This solves the problem that the rake blades of the existing multi-stage series spray drying tower cannot avoid material residue on the heating plate.
[0016] 2. The pre-compression device of this application is in a state of maximum compression when the roller is pressed against the crest of the ring body. When the roller moves from the crest to the trough, the elastic force of the pre-compression device itself can be used to push the roller to the trough.
[0017] 3. The multi-stage series spray drying tower of this application is equipped with a first drying tray and a second drying tray of different sizes and opposite concave and convex directions. When the vibration device drives the first drying tray and the second drying tray to move up and down, the material's own weight can be used to make it easier for the material to fall into the next stage drying tray.
[0018] 4. The multi-stage series spray drying tower of this application is divided into two parts: a preliminary drying chamber and a staged drying chamber. When the material is sprayed from the top of the tower in the form of droplets, it first enters the preliminary drying chamber. These atomized droplets come into full contact with the hot air and quickly dry and remove the moisture on the surface of the powder in a very short time. Then it falls into the multi-stage drying tray. Since the drying tray itself cannot generate heat, its heat source is the heat in the hot air. Therefore, the material that has undergone preliminary drying can be placed on the drying tray for a long time without scorching. After multi-stage drying in the drying tray, the moisture inside the material is finally removed, and the dried product is completed.
[0019] 5. In the multi-stage series spray drying tower of this application, since hot air is transferred from the top to the bottom of the tower and the density of hot air is greater than that of cold air, it can ensure that hot air always fills the primary drying chamber, while avoiding the introduction of a large amount of hot air into the multi-stage drying chamber, thus preventing the material on the drying tray from scorching. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of a drying tower with multi-stage series spray in an embodiment of this application;
[0022] Figure 2 This is a cross-sectional view of a drying tower with multi-stage series spraying according to an embodiment of this application;
[0023] Figure 3 This is a schematic diagram of the vibration device in the embodiments of this application;
[0024] Explanation of reference numerals in the attached figures:
[0025] 1. Top of the tower;
[0026] 2. Tower body; 21. Preliminary drying chamber; 22. Staged drying chamber; 23. First drying tray; 24. Second drying tray; 25. Support frame; 26. Support block; 27. Push rod; 28. Push brush; 29. Tension spring;
[0027] 3. Tower bottom; 31. First collection pipe; 32. Second collection pipe;
[0028] 4. Base;
[0029] 5. Vibration device; 51. Drive motor; 52. Transmission shaft; 53. Preload device; 531. Inner sleeve; 532. Outer sleeve; 533. Spring; 54. Transmission rod; 55. Roller; 56. Ring body; 561. Crest; 562. Trough. Detailed Implementation
[0030] The following will be combined with the appendix Figures 1-3 The embodiments of the technical solutions of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.
[0031] Example 1:
[0032] like Figures 1-2 This illustration depicts a multi-stage series spray drying tower according to this application. The multi-stage series spray drying tower mainly includes a tower top 1, a tower body 2, a tower bottom 3, and a base 4. Inside the tower body 2, it is divided into two parts according to the drying requirements of the material: a preliminary drying chamber 21 and a staged drying chamber 22.
[0033] In one embodiment of this application, a multi-stage drying chamber 22 is provided with first drying discs 23 protruding towards the top of the tower 1 and second drying discs 24 recessed therein. These drying discs are arranged alternately to form a multi-stage drying structure. The radial dimension of the first drying disc 23 is smaller than that of the second drying disc 24, and the center of the second drying disc 24 has a through hole larger than the diameter of the drive shaft 52, so that the dried material can gradually slide down the concave surface of the second drying disc towards the drive shaft 52, and finally fall through the through hole into the next stage of the first drying disc 23.
[0034] Furthermore, a pusher rod 27 is provided below the first drying tray 23. One end of the pusher rod 27 is connected to the drive shaft 52, and the other end extends to the edge of the first drying tray 23. Between the pusher rod 27 and the first drying tray 23, a pusher brush 28 is installed close to the upper surface of the first drying tray 23. The rotation of the pusher rod 27 drives the pusher brush 28 to move in a circular motion along the surface of the drying tray, gradually sweeping the material on the first drying tray 23 to the next stage, the second drying tray 24.
[0035] In one embodiment of this application, when the material is sprayed from the top of the tower in the form of droplets, it first enters the preliminary drying chamber 21. These atomized droplets come into full contact with the hot air and quickly dry and remove the moisture from the surface of the powder in a very short time. Then, it falls into the staged drying chamber 22, specifically onto the upper surface of the first drying tray 23 of the multi-stage drying tray. Since the drying tray itself cannot generate heat, its heat source is the heat in the hot air. Therefore, the material that has undergone preliminary drying can be placed on the drying tray for a long time without scorching. After multi-stage drying on the drying tray, the residence time of the material on the drying tray is increased, and the residence time of the material in the tower body 2 is also increased. The moisture inside the material is gradually dried at a lower temperature on the drying tray, and finally the moisture inside the material is removed, completing the dried product.
[0036] Furthermore, to ensure that the push rod 27 maintains a stable posture when the drive shaft 52 rotates, a tension spring 29 is also provided between the push rod 27 and the drive shaft 52. The tension spring 29 is located within the acute angle formed by the two, that is, the tension spring 29 always applies a force pressing down on the drying tray to the push rod 27, so as to ensure that the push brush 28 always adheres to the surface of the drying tray, preventing the drying tray from detaching from the surface of the drying tray when making repeated vertical movements, making it difficult for residual material to be swept to the next stage of the drying device.
[0037] Furthermore, at the very bottom of the tower bottom 3, a first collecting pipe 31 covering the drive shaft 52 is provided. At the same time, a second collecting pipe 32 is also provided on the side wall of the tower bottom 3. The other end of the second collecting pipe 32 can be equipped with equipment such as a cyclone separator to transport the finished product falling to the tower bottom 3 to the next process. The first collecting pipe 31 is used to collect the material that is not drawn away by the cyclone separator.
[0038] Example 2:
[0039] Continue to refer to Figure 2 and Figure 3 In a further embodiment, a drive motor 51 is installed at the bottom of the tower bottom 3, and the motor is connected to a drive shaft 52 via a coupling. The drive shaft 52 passes through the tower bottom 3 and extends upward into the grading drying chamber 22. At the bottom of the drive shaft 52, a pre-compression device 53 is provided, which includes an inner sleeve 531, an outer sleeve 532, and a spring 533 installed between the two. Optionally, the spring 533 may be other devices capable of applying a force to the first drying tray 23 in the direction facing the tower top 1, and having a certain allowance for expansion and contraction.
[0040] Furthermore, the inner sleeve 531 is welded to the drive shaft 52, while the outer sleeve 532 is welded to the bottom surface of the first drying tray 23 at the bottom. When the drive shaft 52 rotates, the pre-compression device 53 compresses or releases according to the contact position between the roller 55 and the ring 56, thereby driving the first drying tray 23 to reciprocate in the vertical direction.
[0041] Above the drive shaft 52, one or more drive rods 54 are connected. The side supports of these drive rods 54 are symmetrically arranged. They first extend horizontally to a position close to the inner wall of the tower body 2, and then extend vertically towards the top of the tower 1 until they reach the ring body 56 set on the inner wall of the top of the tower 1, so as to avoid the drive rods 54 interfering with the pre-dried material.
[0042] Furthermore, the end face of the ring 56 is designed as a wave structure, including a crest 561 and a trough 562. A roller 55 is installed at the end of the transmission rod 54, which fits tightly against the ring 56. When the drive motor 51 starts, the transmission shaft 52 drives the transmission rod 54 to rotate, and the roller 55 rolls along the wave structure of the ring 56, thereby driving the transmission rod 54 and the first drying tray 23 connected to it to reciprocate up and down. When the drying tray moves vertically, residual material can be removed from the surface of the drying tray and simultaneously moved by the hot air passing through the tower 2, causing it to continuously move until it falls to the next stage of drying equipment. Agglomerated material, through the shaking of the drying tray, changes the static friction between it and the drying tray into dynamic friction, and after this dynamic friction occurs, it moves from the gaps between the pusher brushes to the pushing range that the pusher brushes can cover, and is then conveyed to the next stage of drying equipment.
[0043] In the description of the embodiments of this application, the technical terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application 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 the embodiments of this application.
[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set," "equipped with," "connected," and "installed" 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A drying tower with multi-stage series spray, comprising: Tower top (1); tower body (2); tower bottom (3); base (4); characterized in that a vibration device (5) is provided on the drying tower; wherein the vibration device (5) includes: a drive motor (51) provided at the bottom of the tower bottom (3); a transmission shaft (52) connected to the output shaft of the drive motor (51) via a coupling; a pre-compression device (53) provided on the transmission shaft (52) and located at the tower bottom (3); a transmission rod (54) connected to the end of the transmission shaft (52) and extending toward the tower top (1); a roller (55) provided at the end of the transmission rod (54); and an annular body (56) attached to the roller (55) and provided on the inner wall of the tower top (1).
2. The drying tower with multi-stage series spray according to claim 1, characterized in that, The end face of the ring (56) perpendicular to the side wall of the tower (2) and away from the top of the tower (1) is set as a wave structure, that is, there are wave peaks (561) and wave troughs (562).
3. The drying tower with multi-stage series spray according to claim 1, characterized in that, The transmission rod (54) is symmetrically arranged on the side and extends in the following directions: first horizontally to a position close to the inner wall of the tower body (2), and then vertically to the top of the tower (1) until it reaches directly below the ring body (56).
4. The drying tower with multi-stage series spray according to claim 1 or 2, characterized in that, The pre-compression device (53) is located at the junction of the tower body (2) and the tower bottom (3). When the roller (55) is close to the trough (562) of the ring body (56), the pre-compression device (53) is in a compressed state. When the roller (55) is close to the peak (561) of the ring body (56), the pre-compression device (53) is in a maximum compressed state.
5. The drying tower with multi-stage series spray according to claim 1, characterized in that, The drying tower also includes: a preliminary drying chamber (21) located near the top (1) of the tower body (2); a staged drying chamber (22) located near the bottom (3) of the tower body (2); wherein, at least two first drying trays (23) protruding towards the top (1) are provided in the staged drying chamber (22); a second drying tray (24) recessed towards the top (1) is provided between adjacent first drying trays (23); a support frame (25) is provided along the inner wall of the tower body (2); the support frame (25) and A support block (26) is provided between the bottom surfaces of the first drying tray (23); a pusher rod (27) is also provided with one end connected to the drive shaft (52) and the other end extending to the edge of the first drying tray (23); a pusher brush (28) is provided between the pusher rod (27) and the first drying tray (23) and is closely attached to the upper surface of the first drying tray (23); a first collecting pipe (31) covering the drive shaft (52) is provided at the bottom of the tower bottom (3); a second collecting pipe (32) is provided on the side wall of the tower bottom (3).
6. The drying tower with multi-stage series spray according to claim 1 or 5, characterized in that, The pre-compression device (53) includes: an inner sleeve (531) with its end welded to the drive shaft (52); an outer sleeve (532) covering the inner sleeve (531) and with one end welded to the bottom surface of the first drying tray (23) at the bottommost end; and a spring (533) installed in the inner sleeve (531) and the outer sleeve (532) and with its two ends connected to the bottom surface of the inner sleeve (531) and the top surface of the outer sleeve (532) respectively.
7. The drying tower with multi-stage series spray according to claim 5, characterized in that, The radial dimension of the first drying disc (23) is smaller than that of the second drying disc (24), and the center of the second drying disc (24) has a through hole larger than the diameter of the drive shaft (52).
8. The drying tower with multi-stage series spray according to claim 5, characterized in that, A tension spring (29) is provided between the acute angle formed by the push rod (27) and the drive shaft (52).