A spray drying tower with self-cleaning function

Abstract

A spray drying tower with self-cleaning function, relating to the field of spray drying tower technology, includes a support plate, a bottom plate fixedly mounted on top of the support plate, a tower shell fixedly mounted on top of the bottom plate, a top plate fixedly mounted inside the tower shell, four fixedly mounted square plates evenly distributed circumferentially at the bottom of the top plate, the bottom of the square plates being fixedly connected to the bottom plate, and a horizontally movable surrounding plate between each adjacent pair of square plates. The top and side walls of the surrounding plates rub against the top plate and the square plates, forming a drying chamber. Two obliquely sliding cleaning plates are inserted through the ends of the surrounding plates, the cross-section of which is a parallelogram structure. The cleaning plates rub against the surrounding plates. A feeding assembly communicating with the drying chamber is located at the top of the top plate, and a collecting assembly communicating with the drying chamber is located at the bottom of the support plate. This invention solves the problem of many limitations in existing spray drying tower wall cleaning methods.

Description

Technical Field

[0001] This invention relates to the field of spray drying tower technology, specifically a spray drying tower with a self-cleaning function. Background Technology

[0002] Spray drying towers are continuous drying equipment widely used in the chemical industry. Their core application is to rapidly convert liquid materials (such as solutions, emulsions, and suspensions) into powdered, granular, or hollow spherical solid products. Their working principle is based on a high degree of synergy between mass and heat transfer: First, the material is dispersed into fine droplets by an atomizer, greatly increasing the specific surface area. Simultaneously, clean air heated to a high temperature is introduced from the top of the tower and instantly mixes with the droplets within the tower. In the extremely short time that the hot air comes into contact with the droplets, the moisture rapidly vaporizes. The heavier solid particles settle to the bottom of the tower for collection, while the exhaust gas containing a large amount of fine powder needs to be separated from the solid powder and recycled by a cyclone separator or bag filter.

[0003] During spray drying, the emulsion is dispersed into fine droplets by an atomizer and sprayed out. As the droplets move downwards and mix with hot air, some droplets travel to the inner wall of the drying tower and adhere to its surface. With the continuous vaporization of moisture, the solid material formed after these droplets dry gradually adheres to the inner wall and is continuously heated by the hot air, eventually leading to quality problems such as charring and discoloration. Therefore, existing spray drying towers are typically equipped with a wall-adhesive cleaning function to ensure product quality and stable equipment operation.

[0004] Existing spray drying towers have gradually revealed their shortcomings during use, mainly in the following aspects:

[0005] There are several limitations to existing methods for cleaning materials adhering to the walls of spray drying towers. Specifically, there are four main methods: mechanical knocking, high-pressure water jet cleaning, airflow impact, and automatic scraping. Mechanical knocking uses vibration to dislodge the material, but its vibration intensity is limited by the tower's own strength, resulting in relatively weak overall cleaning power and limited effectiveness for high-viscosity materials. High-pressure water jet cleaning and airflow impact utilize high-pressure cleaning water and compressed gas, respectively, to clean the material adhering to the inner wall. However, both methods require shutdown and cannot be completed simultaneously during continuous operation, severely impacting production efficiency. Automatic scraping uses a rotating scraper structure installed inside the tower to continuously scrape the inner wall, enabling online cleaning during operation. However, material can easily accumulate on the scraper structure itself, leading to charring and discoloration after prolonged heating. Therefore, existing methods for cleaning materials adhering to the walls have significant limitations in terms of cleaning effect, operational continuity, and the cleanliness of the cleaning structure itself, greatly affecting the equipment's performance.

[0006] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a spray drying tower with a self-cleaning function. The cleaning method employed by this spray drying tower can clean materials adhering to the walls while the equipment is running continuously, and the viscosity of the materials has minimal impact on the cleaning effect, ensuring a stable and reliable cleaning process. Simultaneously, the cleaning structure itself possesses a self-cleaning function, effectively preventing the accumulation and deterioration of materials on its surface. Therefore, this cleaning method has minimal limitations and significantly improves the equipment's performance and operational reliability.

[0008] To address the above problems, the present invention provides the following technical solution:

[0009] A spray drying tower with self-cleaning function includes a support plate, a bottom plate fixedly mounted on the top of the support plate, a tower shell fixedly mounted on the top of the bottom plate, a top plate fixedly mounted inside the tower shell, four fixedly mounted square plates evenly distributed circumferentially on the bottom of the top plate, the bottom of the square plates being fixedly connected to the bottom plate, and a horizontally movable surrounding plate between each adjacent pair of square plates, the top and side walls of the surrounding plate rubbing against the top plate and the square plates respectively, the square plates and the surrounding plates forming a drying chamber, two obliquely sliding cleaning plates penetrating through the ends of the surrounding plates, the cross-section of the cleaning plates being a parallelogram structure, the cleaning plates rubbing against the surrounding plates, a feeding assembly communicating with the drying chamber on the top of the top plate, and a collecting assembly communicating with the drying chamber on the bottom of the support plate.

[0010] As an optimized solution, the top of the base plate is provided with a through groove, the bottom end of the surrounding plate is located in the through groove and rubs against the base plate, the bottom surface of the surrounding plate rubs against the bearing plate, and the top of the bearing plate is provided with a material passage groove.

[0011] As an optimized solution, the material collection assembly includes a fixedly installed material collection hopper, which is connected to a material passage trough. A discharge valve is provided at the lower port of the material collection hopper. A water-cooled jacket is fitted on the outer wall of the material collection hopper, which is connected to an external circulating cold water source. An exhaust pipe is provided on the outer wall of the material collection hopper, which passes through the water-cooled jacket and is connected to a cyclone separator.

[0012] As an optimized solution, the end of the enclosure is provided with several sliding blocks that slide horizontally, the end of each sliding block is fixedly provided with a positioning plate, and the end of the square plate is provided with several positioning grooves.

[0013] As an optimized solution, a drive plate is provided at the end of the enclosure for horizontal movement, one end of the cleaning plate is slidably connected to the drive plate, a connecting plate is fixedly provided at the end of the drive plate, active wedge blocks are fixedly provided at opposite ends of the connecting plate, a driven wedge block is fixedly provided at the end of the sliding block, and the inclined end of the active wedge block and the inclined end of the driven wedge block are slidably connected.

[0014] As an optimized solution, a plurality of control telescopic cylinders are fixedly provided at the end of the enclosure, and the telescopic ends of the control telescopic cylinders are fixedly connected to the drive plate.

[0015] As an optimized solution, a number of drive telescopic cylinders are fixedly provided on the outer wall of the tower shell, and the telescopic ends of the drive telescopic cylinders pass through the tower shell and the drive plate and are fixedly connected to the surrounding plate.

[0016] As an optimized solution, the feeding assembly includes an air distribution cylinder that is fixedly installed through the top plate. The air distribution cylinder has an air passage groove inside, which extends downward through the air distribution cylinder. A guide plate is fixedly installed at the bottom of the air distribution cylinder. An atomizer is fixedly installed on the inner wall of the air distribution cylinder. The atomizer is connected to an external high-pressure pipeline system, and the air passage groove is connected to an external hot air source.

[0017] As an optimized solution, the top of the enclosure is provided with a clearance structure to avoid the air distribution cylinder.

[0018] As an optimized solution, the top, bottom, and side walls of the enclosure are all covered with sealing gaskets.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. When cleaning the material adhering to the wall at the end of the enclosure, the drive plate moves towards the enclosure, and the cleaning plate slides obliquely and extends until one edge of the cleaning plate contacts the side enclosure. At this point, the edge of the cleaning plate acts as a scraper. During the movement of the cleaning plate, the sliding block drives the positioning plate to disengage from the positioning groove through the transmission of the active wedge block and the driven wedge block, thereby releasing the limitation on the enclosure. Subsequently, the drive telescopic cylinder drives the extended enclosure of the cleaning plate to slide horizontally outward, and the cleaning plate cleans the material at the edges of the enclosure on both sides (e.g., Figure 11 (As shown), then the telescopic cylinder is driven to slide the side panels inward, and the cleaning plate scrapes off the material adhering to the walls of the side panels on both sides (as shown). Figure 12As shown in the diagram, after cleaning, the enclosure plates and drive plates are reset, the positioning plate is reinserted into the positioning slot to achieve the limit, and the cleaning plate is retracted. The four enclosure plates repeat the above process in sequence to complete the cleaning of all enclosure plate end faces. Although the space of the drying chamber changes during the movement of the enclosure plates, it remains closed with the cooperation of the sealing gasket. Therefore, the equipment can continue to operate when cleaning the materials adhering to the walls. In addition, when the cleaning plate is retracted, the material on its side wall will be peeled off by the enclosure plate that rubs against it. At the same time, the cleaning plate can also clean the end face of the cleaning plate on the enclosure plate being cleaned, realizing the self-cleaning function of the cleaning plate. Meanwhile, the cleaning plate relies on the squeezing of the drive plate to contact the enclosure plate, resulting in extremely high cleaning intensity. The viscosity of the material has minimal impact on its cleaning effect. The cleaning method adopted by this spray drying tower can clean the materials adhering to the walls while the equipment is running continuously, and the viscosity of the material has a minimal impact on the cleaning effect, ensuring a stable and reliable cleaning process. At the same time, the cleaning structure itself has a self-cleaning function, effectively avoiding the problem of material accumulation and deterioration on its surface. Therefore, this cleaning method has minimal limitations and significantly improves the use effect and operational reliability of the equipment.

[0021] 2. The water-cooled jacket installed on the outer wall of the hopper continuously absorbs and removes the heat accumulated on the inner wall of the hopper and the material inside through the circulating cooling medium, so that the solid material collected in the hopper is always kept in a low temperature range, thereby effectively inhibiting the quality problems such as coking and discoloration of the material due to prolonged heating.

[0022] 3. During the movement of the drive plate, when the cleaning plate extends out of the enclosure, the positioning plate simultaneously disengages from the positioning groove, thereby releasing the restriction on the enclosure. When the cleaning plate retracts, the positioning plate simultaneously inserts into the positioning groove, forming a limit on the enclosure, thereby improving the stability of the enclosure. The linkage design between the cleaning plate and the positioning plate effectively improves the ease of use of the equipment. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the tower shell of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the top plate and the bottom plate of the present invention;

[0027] Figure 4This is a schematic diagram showing the arrangement of the square plate and the surrounding plate of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the end and bottom of the enclosure panel of the present invention;

[0029] Figure 6 This is a schematic diagram of the cleaning board driving method of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the material collection assembly of the present invention;

[0031] Figure 8 This is a schematic diagram of the sliding block driving method of the present invention;

[0032] Figure 9 This is a schematic diagram of the feeding assembly of the present invention;

[0033] Figure 10 This is a schematic diagram of the drying chamber under normal conditions of the present invention;

[0034] Figure 11 This is a schematic diagram of the cleaning plate of the present invention cleaning the edge of the enclosure;

[0035] Figure 12 This is a schematic diagram of the cleaning plate of the present invention cleaning half of the enclosure area.

[0036] In the diagram: 1-Bearing plate; 2-Tower shell; 3-Bottom plate; 4-Collecting assembly; 5-Feeding assembly; 6-Air distribution cylinder; 7-Material channel; 8-Through channel; 9-Square plate; 10-Top plate; 11-Drive telescopic cylinder; 12-Surrounding plate; 13-Cleaning plate; 14-Avoidance structure; 15-Sealing gasket; 16-Control telescopic cylinder; 17-Drive plate; 18-Positioning groove; 19-Positioning plate; 20-Sliding block; 21-Driven wedge block; 22-Active wedge block; 23-Connecting plate; 24-Water cooling jacket; 25-Collecting hopper; 26-Discharge valve; 27-Exhaust pipe; 28-Guide plate; 29-Atomizer; 30-Ventilation channel; 31-Drying chamber; 32-Sliding plate. Detailed Implementation

[0037] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0038] like Figures 1 to 12As shown, a spray drying tower with self-cleaning function includes a support plate 1, a bottom plate 3 fixedly mounted on the top of the support plate 1, a tower shell 2 fixedly mounted on the top of the bottom plate 3, a top plate 10 fixedly mounted inside the tower shell 2, four fixedly mounted square plates 9 evenly distributed circumferentially at the bottom of the top plate 10, the bottom of the square plates 9 being fixedly connected to the bottom plate 3, and a horizontally movable surrounding plate 12 between each adjacent pair of square plates 9, the top and side walls of the surrounding plate 12 correspondingly rubbing against the top plate 10 and the square plates 9, the square plates 9 and the surrounding plate 12 enclosing to form a drying chamber 31, two obliquely sliding cleaning plates 13 penetrating through the ends of the surrounding plate 12, the cross-section of the cleaning plate 13 being a parallelogram structure, the cleaning plate 13 rubbing against the surrounding plate 12, a feeding assembly 5 communicating with the drying chamber 31 at the top of the top plate 10, and a collecting assembly 4 communicating with the drying chamber 31 at the bottom of the support plate 1.

[0039] The bottom plate 3 has a through groove 8 at the top, the bottom end of the surrounding plate 12 is located in the through groove 8 and rubs against the bottom plate 3, the bottom surface of the surrounding plate 12 rubs against the bearing plate 1, and the top of the bearing plate 1 has a through groove 7.

[0040] The material collection assembly 4 includes a fixedly installed material collection hopper 25, which is connected to the material passage trough 7. The lower end of the material collection hopper 25 is provided with a discharge valve 26. The outer wall of the material collection hopper 25 is fitted with a water-cooled jacket 24, which is connected to an external circulating cold water source. The outer wall of the material collection hopper 25 is provided with an exhaust pipe 27, which passes through the water-cooled jacket 24 and is connected to the cyclone separator.

[0041] Several sliding blocks 20 are provided horizontally at the end of the enclosure 12, and a positioning plate 19 is fixedly provided at the end of the sliding block 20. Several positioning grooves 18 are provided at the end of the square plate 9.

[0042] A drive plate 17 is provided at the end of the enclosure 12 for horizontal movement. One end of the cleaning plate 13 is slidably connected to the drive plate 17. A connecting plate 23 is fixedly provided at the end of the drive plate 17. Active wedge blocks 22 are fixedly provided at opposite ends of the connecting plate 23. A driven wedge block 21 is fixedly provided at the end of the sliding block 20. The inclined ends of the active wedge block 22 and the inclined ends of the driven wedge block 21 are slidably connected.

[0043] A sliding plate 32 is fixedly provided at the end of the cleaning plate 13, and the sliding plate 32 is slidably connected to the drive plate 17.

[0044] Several control telescopic cylinders 16 are fixedly provided at the end of the enclosure 12, and the telescopic ends of the control telescopic cylinders 16 are fixedly connected to the drive plate 17.

[0045] Several drive telescopic cylinders 11 are fixedly installed on the outer wall of the tower shell 2. The telescopic ends of the drive telescopic cylinders 11 pass through the tower shell 2 and the drive plate 17 and are fixedly connected to the surrounding plate 12.

[0046] The feeding assembly 5 includes an air distribution cylinder 6 that is fixedly inserted through the top plate 10. The air distribution cylinder 6 has an air passage 30 inside, which extends downward through the air distribution cylinder 6. A guide plate 28 is fixedly installed at the bottom of the air distribution cylinder 6. An atomizer 29 is fixedly installed on the inner wall of the air distribution cylinder 6. The atomizer 29 is connected to an external high-pressure pipeline system, and the air passage 30 is connected to an external hot air source.

[0047] The top of the enclosure 12 is provided with an obstacle avoidance structure 14 to avoid the air distribution cylinder 6.

[0048] Sealing gaskets 15 are laid on the top, bottom and side walls of the enclosure 12.

[0049] The working principle of this device is as follows:

[0050] When the equipment is running under normal conditions, the end face of the enclosure 12 is flush with the end faces of the square plates 9 on both sides, and the cleaning plate 13 is not extended, with its end face flush with the end face of the enclosure 12 (as described above). Figure 10 As shown), the positioning plate 19 is inserted into the positioning groove 18 and limits the surrounding plate 12. The liquid material enters the atomizer 29 through the external high-pressure pipeline system. The atomizer 29 disperses the liquid material into droplets and sprays them into the drying chamber 31 formed by the square plate 9 and the surrounding plate 12. At the same time, the hot air discharged from the external hot air source enters the ventilation groove 30 and is discharged into the drying chamber 31 to mix with the droplets, thereby drying the material. After drying, the heavier solid material settles into the collection hopper 25 for collection, while the wet exhaust gas containing fine powder enters the cyclone separator through the exhaust pipe 27 for separation.

[0051] When cleaning the material adhering to the end of the enclosure 12, the drive plate 17 moves towards the enclosure 12, and the cleaning plate 13 slides obliquely and extends until one edge of the cleaning plate 13 contacts the side enclosure 12. At this time, the edge of the cleaning plate 13 acts as a scraper. During the movement of the cleaning plate 13, the sliding block 20 drives the positioning plate 19 to disengage from the positioning groove 18 through the transmission of the active wedge block 22 and the driven wedge block 21, thereby releasing the limitation on the enclosure 12. Subsequently, the drive telescopic cylinder 11 drives the enclosure 12 extending from the cleaning plate 13 to slide horizontally outward first, and the cleaning plate 13 cleans the material at the edges of the two enclosures 12 (such as...). Figure 11 (As shown), then the telescopic cylinder 11 is driven to slide the enclosure 12 inward, and the cleaning plate 13 is used to scrape off the sticky material on half of the enclosure 12 on both sides (such as...). Figure 12As shown), after cleaning, the enclosure plate 12 and drive plate 17 are reset one after another, the positioning plate 19 is reinserted into the positioning slot 18 to achieve the limit, and the cleaning plate 13 is retracted. The four enclosure plates 12 repeat the above process in sequence, thereby completing the cleaning of the end faces of all enclosure plates 12. During the movement of the enclosure plates 12, although the space of the drying chamber 31 changes, it remains closed with the cooperation of the sealing gasket 15. Therefore, the equipment can continue to operate when cleaning the materials adhering to the wall. In addition, when the cleaning plate 13 is retracted, the material on its side wall will be peeled off by the enclosure plate 12 that rubs against it. And while cleaning the enclosure plate 12, the cleaning plate 13 can also clean the cleaning plate 1 on the enclosure plate 12 being cleaned. The cleaning process involves cleaning the three end faces, achieving the self-cleaning function of the cleaning plate 13. Simultaneously, the cleaning plate 13 contacts the surrounding plate 12 through the compression of the drive plate 17, resulting in extremely high cleaning intensity. The viscosity of the material has minimal impact on its cleaning effect. This cleaning method employed in the spray drying tower can clean materials adhering to the wall while the equipment is running continuously, and the viscosity of the material has minimal impact on the cleaning effect, ensuring a stable and reliable cleaning process. Furthermore, the cleaning structure itself has a self-cleaning function, effectively preventing the accumulation and deterioration of materials on its surface. Therefore, this cleaning method has minimal limitations and significantly improves the equipment's performance and operational reliability.

[0052] The water-cooled jacket 24 fitted on the outer wall of the hopper 25 continuously absorbs and removes the heat accumulated on the inner wall of the hopper and the material inside through the circulating cooling medium, so that the solid material collected in the hopper 25 is always kept in a low temperature range, thereby effectively inhibiting the quality problems such as coking and discoloration of the material due to prolonged heating.

[0053] During the movement of the drive plate 17, when the cleaning plate 13 extends out of the enclosure 12, the positioning plate 19 simultaneously disengages from the positioning groove 18, thereby releasing the restriction on the enclosure 12. When the cleaning plate 13 retracts, the positioning plate 19 simultaneously inserts into the positioning groove 18, forming a limit on the enclosure 12, thereby improving the stability of the enclosure 12. The linkage design of the cleaning plate 13 and the positioning plate 19 effectively improves the ease of use of the equipment.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not 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, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A spray drying tower having a self-cleaning function, characterized by: The structure includes a support plate (1), a base plate (3) fixedly mounted on the top of the support plate (1), a tower shell (2) fixedly mounted on the top of the base plate (3), a top plate (10) fixedly mounted inside the tower shell (2), and four square plates (9) evenly distributed circumferentially at the bottom of the top plate (10). The bottom of the square plates (9) is fixedly connected to the base plate (3). A horizontally movable surrounding plate (12) is provided between each two adjacent square plates (9). The top and side walls of the surrounding plate (12) correspond to the top plate (10) and the square plates (9). The square plate (9) and the surrounding plate (12) rub against each other to form a drying chamber (31). Two obliquely sliding cleaning plates (13) are provided through the end of the surrounding plate (12). The cross section of the cleaning plate (13) is a parallelogram structure. The cleaning plate (13) rubs against the surrounding plate (12). The top plate (10) is provided with a feeding assembly (5) communicating with the drying chamber (31) at the top. The bottom of the bearing plate (1) is provided with a collecting assembly (4) communicating with the drying chamber (31). The bottom plate (3) has a through groove (8) at the top, the bottom end of the surrounding plate (12) is located in the through groove (8) and rubs against the bottom plate (3), the bottom surface of the surrounding plate (12) rubs against the bearing plate (1), and the top of the bearing plate (1) has a through groove (7). The end of the enclosure (12) is provided with a plurality of sliding blocks (20) that slide horizontally, and the end of the sliding block (20) is provided with a positioning plate (19), and the end of the square plate (9) is provided with a plurality of positioning grooves (18). The end of the enclosure (12) is provided with a drive plate (17) that moves horizontally. One end of the cleaning plate (13) is slidably connected to the drive plate (17). The end of the drive plate (17) is fixedly provided with a connecting plate (23). The opposite ends of the connecting plate (23) are both fixedly provided with active wedge blocks (22). The end of the sliding block (20) is fixedly provided with a driven wedge block (21). The inclined end of the active wedge block (22) and the inclined end of the driven wedge block (21) are slidably connected. A plurality of control telescopic cylinders (16) are fixedly provided at the end of the enclosure (12), and the telescopic end of the control telescopic cylinder (16) is fixedly connected to the drive plate (17); The outer wall of the tower shell (2) is fixedly provided with a number of drive telescopic cylinders (11). The telescopic end of the drive telescopic cylinder (11) passes through the tower shell (2) and the drive plate (17) and is fixedly connected to the surrounding plate (12).

2. The spray drying tower with self-cleaning function according to claim 1, characterized in that: The material collection assembly (4) includes a fixedly installed material collection hopper (25), which is connected to the material passage trough (7). The lower end of the material collection hopper (25) is provided with a discharge valve (26). The outer wall of the material collection hopper (25) is fitted with a water-cooled jacket (24), which is connected to an external circulating cold water source. The outer wall of the material collection hopper (25) is provided with an exhaust pipe (27), which passes through the water-cooled jacket (24) and is connected to a cyclone separator.

3. The spray drying tower with self-cleaning function according to claim 1, characterized in that: The feeding assembly (5) includes an air distribution cylinder (6) that is fixedly connected to the top plate (10). The air distribution cylinder (6) has an air passage (30) inside, which extends downward through the air distribution cylinder (6). A guide plate (28) is fixedly provided at the bottom of the air distribution cylinder (6). An atomizer (29) is fixedly provided on the inner wall of the air distribution cylinder (6). The atomizer (29) is connected to an external high-pressure pipeline system, and the air passage (30) is connected to an external hot air source.

4. The spray drying tower with self-cleaning function according to claim 3, characterized in that: The top of the enclosure (12) is provided with a clearance structure (14) to avoid the air distribution cylinder (6).

5. The spray drying tower with self-cleaning function according to claim 1, characterized in that: The top, bottom and side walls of the enclosure (12) are covered with sealing gaskets (15).

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