A spray granulation dryer

Abstract

The application discloses a spray granulation dryer, and relates to the technical field of dryers, which comprises a drying tower, the upper portion of the drying tower is provided with a tower cover, a spray pipe is arranged through the upper center of the tower cover, the lower end of the spray pipe is provided with an annular shell, the lower portion of the tower cover is provided with a tower inner wall cleaning assembly, and the upper portion of one side of the tower cover is provided with a motor. The spray granulation dryer can drive the annular gear to rotate through the main gear under the working of the motor when the inner wall of the drying tower needs to be cleaned, so that the scraper can clean the inner wall of the drying tower. When the raw materials on the scraper are too much, the adsorption electromagnet works to adsorb the iron bar, so that the scraper is stored in the storage shell plate, the raw materials attached to the scraper are blocked, the cleanliness of the surface of the scraper is ensured, and then the scraper is moved out to scrape the raw materials, so that the cleaning effect of the inner wall of the drying tower is improved.

Description

Technical Field

[0001] This invention relates to the field of dryer technology, specifically to a spray granulation dryer. Background Technology

[0002] A spray dryer is a device that sprays liquid materials into fine droplets through a sprayer, which then come into contact with and transfer heat to a high-temperature hot airflow, causing the water in the liquid to evaporate and thus transforming the liquid material into a powdery or granular dried product. A spray dryer typically consists of a sprayer, a heating system, a drying chamber, an air duct system, and a control system. After use, a lot of raw material will adhere to the inner wall of the drying tower of the spray granulation dryer, and this raw material cannot be cleaned off.

[0003] Chinese Patent Publication No. CN214620304U discloses an adjustable spray dryer. This adjustable spray dryer can scrape off the raw material adhering to the inner wall of the drying tower by rotating the scraper. However, when the scraper is scraping, the raw material will adhere to the scraper. If the scraper continues to scrape, the raw material on the scraper will continue to adhere to the inner wall of the drying tower.

[0004] When a spray granulation dryer is used for a long time, the atomizer nozzles inside the spray granulation dryer are prone to clogging, which affects the atomization effect. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a spray granulation dryer that solves the problems of poor inner wall cleaning and easy clogging of atomizing nozzles in traditional spray granulation dryers.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a spray granulation dryer, comprising a drying tower, a tower cover provided on the upper part of the drying tower, a spray pipe provided through the center of the upper part of the tower cover, an annular outer shell provided at the lower end of the spray pipe, a tower inner wall cleaning component provided on the lower part of the tower cover, and a motor installed on the upper side of one side of the tower cover.

[0007] The tower inner wall cleaning assembly includes a ring gear rotatably mounted at the bottom of the tower cover and a main gear connected to the motor output shaft. The main gear meshes with the ring gear. A receiving shell plate is provided on the lower part of one side of the ring gear. A limiting groove is provided on the side of the receiving shell plate near the inner wall of the drying tower. A scraper slides laterally through the limiting groove. The width of the limiting groove is exactly equal to the thickness of the scraper. An adsorption electromagnet is provided on the inside of the receiving shell plate away from the scraper. An iron strip is provided on the side of the scraper located inside the receiving shell plate. The iron strip is fixedly connected to the adsorption electromagnet by a spring. A vibration motor is installed on the upper end of the receiving shell plate away from the scraper.

[0008] Preferably, when the spring is in the reset state, the side of the scraper away from the iron bar is attached to the inner wall of the drying tower.

[0009] Preferably, the attraction force of the electromagnet to the iron bar is greater than the elastic force of the spring, so that when the electromagnet is powered on, the scraper moves into the interior of the housing plate.

[0010] Preferably, a limiting sleeve is provided on the outer wall of the spray pipe at a position below the tower cover, and a collector ring is installed on the outer wall of the limiting sleeve. The adsorption electromagnet and the vibration motor are both electrically connected to the collector ring through wires.

[0011] Preferably, a rotary cylinder is installed on one side of the annular housing, and the output shaft of the rotary cylinder is located inside the annular housing and connected to a sprayer.

[0012] Preferably, the sprayer includes a spray plate, one side of which is densely covered with spray holes for atomizing the concentrate. An elastic steel plate is provided at the outer edge of the spray plate, a rubber pad is provided on the outer side of the elastic steel plate, and an annular iron pad is provided on the inner side of the elastic steel plate. An inwardly folding plate is provided on the upper side of the elastic steel plate, and the folding plate is fixedly provided at the upper edge of the spray plate. The inner side of the elastic steel plate does not contact the outer edge of the spray plate. An annular electromagnet corresponding to the annular iron pad is provided on the outer edge of the spray plate.

[0013] Preferably, the attraction force of the annular electromagnet to the annular iron pad is greater than the elastic force of the elastic steel plate. When the annular electromagnet is powered on and the spray plate is in a horizontal state, the elastic steel plate uses its own elasticity to make the rubber pad press against the inner wall of the annular outer shell.

[0014] Preferably, the upper end of the spray pipe is connected to a raw liquid feed pipe for the raw liquid to pass through, and a hot air delivery pipe for hot air to pass through is provided on one side of the spray pipe above the tower cover.

[0015] This invention provides a spray granulation dryer, which has the following advantages compared with the prior art:

[0016] 1. When the inner wall of the drying tower needs to be cleaned, the main gear drives the ring gear to rotate under the operation of the motor, so that the scraper cleans the inner wall of the drying tower. When there is too much material on the scraper, the electromagnet is activated to attract the iron strip, so that the scraper is collected in the collection shell plate, and the material attached to the scraper is blocked to ensure the cleanliness of the scraper surface. Then the scraper is moved out to scrape the material, thereby improving the cleaning effect of the inner wall of the drying tower.

[0017] 2. In this spray granulation dryer, if the sprayer becomes clogged during atomization, the spray plate can be rotated 180 degrees by the operation of the rotary cylinder. This allows for backwashing of the spray plate and unblocking of the spray holes. After unblocking, the spray plate is rotated back to its initial position. By installing an elastic steel plate on the spray plate, the rubber pad on the elastic steel plate will be in close contact with the inner wall of the annular shell, ensuring a tight seal. When the spray plate needs to be rotated, the annular electromagnet attracts the iron pad on the elastic steel plate, preventing the elastic steel plate from contacting the inner wall of the annular shell, thus facilitating the rotation of the spray plate by the rotary cylinder. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the drying tower of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the tower inner wall cleaning component of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the housing shell of the present invention;

[0022] Figure 5 This is a schematic diagram of the installation of the annular outer shell structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the internal structure of the annular outer shell of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the sprayer of the present invention.

[0025] In the diagram: 1. Drying tower; 2. Tower cover; 3. Spray pipe; 31. Raw material feed pipe; 32. Hot air conveying pipe; 4. Tower inner wall cleaning assembly; 41. Ring gear; 42. Limiting sleeve; 421. Slip ring; 43. Main gear; 44. Storage shell plate; 45. Scraper; 46. Iron bar; 47. Adsorption electromagnet; 48. Spring; 49. Vibration motor; 5. Annular outer shell; 51. Rotary cylinder; 52. Sprayer; 521. Spray plate; 522. Spray hole; 523. Elastic steel plate; 524. Rubber pad; 525. Annular electromagnet; 526. Annular iron pad; 6. Motor. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-7 This invention provides three technical solutions:

[0028] Example 1

[0029] Please see Figure 1-2 In this embodiment of the invention, a spray granulation dryer includes a drying tower 1, a tower cover 2 is provided on the upper part of the drying tower 1, a spray pipe 3 is provided through the center of the upper part of the tower cover 2, an annular shell 5 is provided at the lower end of the spray pipe 3, a tower inner wall cleaning component 4 is provided at the lower part of the tower cover 2, and a motor 6 is installed on the upper side of one side of the tower cover 2.

[0030] Please see Figure 3-4 In this embodiment of the invention, the tower inner wall cleaning component 4 includes a ring gear 41 rotatably disposed at the bottom of the tower cover 2 and a main gear 43 connected to the output shaft of the motor 6. The main gear 43 meshes with the ring gear 41. A storage shell plate 44 is provided on the lower part of one side of the ring gear 41. A limiting groove is provided on the side of the storage shell plate 44 near the inner wall of the drying tower 1. A scraper 45 slides laterally through the limiting groove. The width of the limiting groove is exactly equal to the thickness of the scraper 45. An adsorption electromagnet 47 is provided on the side of the storage shell plate 44 away from the scraper 45. An iron strip 46 is provided on the side of the scraper 45 located inside the storage shell plate 44. The iron strip 46 and the adsorption electromagnet 47 are fixedly connected by a spring 48. A vibration motor 49 is installed on the upper end of the storage shell plate 44 away from the scraper 45.

[0031] In operation, motor 6 drives main gear 43 to rotate, which in turn drives the meshing ring gear 41 to rotate. The ring gear 41 then drives the receiving shell plate 44 to revolve. This causes scraper 45 to scrape away the raw material adhering to the inner wall of drying tower 1. If raw material adheres to scraper 45 and affects its scraping effect, the power to electromagnet 47 is switched on. Because the attraction force of electromagnet 47 on iron bar 46 is greater than the elastic force of spring 48, the iron bar 46 will move towards the electromagnet 47 after the power is switched on. When the material is placed close, the scraper 45 will move into the inside of the receiving shell plate 44, and the material attached to the scraper 45 will be blocked by the receiving shell plate 44. Then, the vibration motor 49 drives the receiving shell plate 44 to vibrate, shaking off the material attached to the outer wall of the receiving shell plate 44. After the material on the scraper 45 is processed, the power supply of the adsorption electromagnet 47 is turned off, and the spring 48 will reset the scraper 45, so that the side of the scraper 45 away from the iron bar 46 is attached to the inner wall of the drying tower 1, and the cleaning operation of the material attached to the inner wall of the drying tower 1 continues.

[0032] For further details, please refer to Figure 3-4 In this embodiment of the invention, when the spring 48 is in the reset state, the side of the scraper 45 away from the iron strip 46 is attached to the inner wall of the drying tower 1. When the scraper 45 moves, it can clean the inner wall of the drying tower 1.

[0033] For further details, please refer to [link / reference]. Figure 3-4 In this embodiment of the invention, the attraction force of the electromagnet 47 on the iron strip 46 is greater than the elastic force of the spring 48. When the electromagnet 47 is powered on, the scraper 45 moves into the interior of the receiving shell 44, and the raw material on the scraper 45 is blocked by the receiving shell 44.

[0034] For further details, please refer to Figure 3-4 In this embodiment of the invention, a limiting sleeve 42 is provided on the outer wall of the spray pipe 3 at the position below the tower cover 2. A collector ring 421 is installed on the outer wall of the limiting sleeve 42. The adsorption electromagnet 47 and the vibration motor 49 are both electrically connected to the collector ring 421 through wires. Under the movement of the adsorption electromagnet 47 and the vibration motor 49, the wires will not become entangled.

[0035] Example 2 differs from Example 1 in that:

[0036] Please see Figure 5-6 In this embodiment of the invention, a rotary cylinder 51 is installed on one side of the annular shell 5. The output shaft of the rotary cylinder 51 is located inside the annular shell 5 and connected to a sprayer 52. The sprayer 52 includes a spray plate 521. One side of the spray plate 521 is densely provided with spray holes 522 for atomizing the original liquid.

[0037] In use, the raw liquid enters through the raw liquid inlet pipe 31, and then enters the interior of the annular shell 5 through the spray pipe 3. It is atomized and sprayed out through the spray holes 522 on the spray plate 521. When the spray holes 522 on the spray plate 521 become blocked, the rotary cylinder 51 drives the spray plate 521 to rotate 180 degrees. In this way, the raw liquid will backwash the spray holes 522 on the spray plate 521, washing away the blocked raw material. After rinsing, the spray plate 521 is rotated back to its original position.

[0038] Example 3 differs from Example 1 in that:

[0039] Please see Figure 6-7 In this embodiment of the invention, an elastic steel plate 523 is provided at the outer edge of the spray plate 521, a rubber pad 524 is provided on the outer side of the elastic steel plate 523, and an annular iron pad 526 is provided on the inner side of the elastic steel plate 523. An inwardly folding plate is provided on the upper side of the elastic steel plate 523. The folding plate is fixedly provided at the upper edge of the spray plate 521. The inner side of the elastic steel plate 523 does not contact the outer edge of the spray plate 521. An annular electromagnet 525 corresponding to the annular iron pad 526 is provided on the outer edge of the spray plate 521.

[0040] Please see Figure 6-7 In this embodiment of the invention, the attraction force of the annular electromagnet 525 to the annular iron pad 526 is greater than the elastic force of the elastic steel plate 523. When the annular electromagnet 525 is powered on and the spray plate 521 is in a horizontal state, the elastic steel plate 523 uses its own elasticity to make the rubber pad 524 press against the inner wall of the annular outer shell 5.

[0041] In use, when the power supply to the annular electromagnet 525 is turned on, the annular electromagnet 525 will attract the annular iron pad 526 on the inner side of the elastic steel plate 523. Since the attraction force of the annular electromagnet 525 on the annular iron pad 526 is greater than the elastic force of the elastic steel plate 523, the lower side of the elastic steel plate 523 will move closer to the annular electromagnet 525. The rubber pad 524 on the elastic steel plate 523 will not contact the inner wall of the annular outer shell 5, thus facilitating the rotation of the cylinder 51 to drive the spray plate 521 to rotate. After the spray plate 521 returns to the initial position, the power supply to the annular electromagnet 525 is turned off. Under the elasticity of the elastic steel plate 523, the elastic steel plate 523 will cause the rubber pad 524 to press against the inner wall of the annular outer shell 5, thus achieving a sealing effect.

[0042] For further details, please refer to Figure 2 In this embodiment of the invention, the upper end of the spray pipe 3 is connected to a raw liquid feed pipe 31 for the raw liquid to pass through, and a hot air delivery pipe 32 for hot air to pass through is provided on one side of the spray pipe 3 above the tower cover 2.

[0043] Working principle: When the inner wall of the drying tower 1 needs to be cleaned, the motor 6 drives the main gear 43 to rotate, which in turn drives the ring gear 41 meshing with it to rotate. The ring gear 41 then drives the receiving shell plate 44 to revolve. In this way, the scraper 45 scrapes off the raw material adhering to the inner wall of the drying tower 1. During the scraping process, if the raw material adheres to the scraper 45 and affects its scraping effect, the power supply of the electromagnet 47 is turned on. Since the attraction force of the electromagnet 47 on the iron bar 46 is greater than the elastic force of the spring 48, the iron bar 46 will move towards the electromagnet 47 after the power supply is turned on. When the electromagnet 47 is brought close, the scraper 45 moves into the housing plate 44, and the material attached to the scraper 45 is blocked by the housing plate 44. Then, the vibration motor 49 drives the housing plate 44 to vibrate, shaking off the material attached to the outer wall of the housing plate 44. After the material on the scraper 45 is processed, the power of the electromagnet 47 is turned off, and the spring 48 will reset the scraper 45, so that the side of the scraper 45 away from the iron bar 46 is attached to the inner wall of the drying tower 1, and the cleaning operation of the material attached to the inner wall of the drying tower 1 continues.

[0044] The raw liquid enters through the raw liquid inlet pipe 31, and then enters the interior of the annular shell 5 through the spray pipe 3. It is atomized and sprayed out through the spray holes 522 on the spray plate 521. When the spray holes 522 on the spray plate 521 become blocked, the rotary cylinder 51 drives the spray plate 521 to rotate 180 degrees. In this way, the raw liquid will backwash the spray holes 522 on the spray plate 521, washing away the blocked raw material. After the washing is completed, the spray plate 521 is rotated back to its original position.

[0045] When the spray plate 521 is rotated, the power supply to the annular electromagnet 525 is turned on. The annular electromagnet 525 will attract the annular iron pad 526 on the inner side of the elastic steel plate 523. Since the attraction force of the annular electromagnet 525 on the annular iron pad 526 is greater than the elastic force of the elastic steel plate 523, the lower side of the elastic steel plate 523 will move closer to the annular electromagnet 525. The rubber pad 524 on the elastic steel plate 523 will not contact the inner wall of the annular outer shell 5, thus facilitating the rotation of the cylinder 51 to drive the spray plate 521 to rotate. After the spray plate 521 returns to the initial position, the power supply to the annular electromagnet 525 is turned off. Under the elasticity of the elastic steel plate 523, the elastic steel plate 523 will cause the rubber pad 524 to press against the inner wall of the annular outer shell 5, thus playing a sealing role.

[0046] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A spray granulation dryer, comprising a drying tower (1), wherein a tower cover (2) is provided on the upper part of the drying tower (1), a spray pipe (3) is provided through the center of the upper part of the tower cover (2), and an annular outer shell (5) is provided at the lower end of the spray pipe (3), characterized in that: The lower part of the tower cover (2) is provided with a tower inner wall cleaning component (4), and a motor (6) is installed on the upper part of one side of the tower cover (2). The tower inner wall cleaning assembly (4) includes a ring gear (41) rotatably disposed at the bottom of the tower cover (2) and a main gear (43) connected to the output shaft of the motor (6). The main gear (43) meshes with the ring gear (41). A storage shell plate (44) is provided on the lower part of one side of the ring gear (41). A limiting groove is provided on the side of the storage shell plate (44) near the inner wall of the drying tower (1). A scraper (45) slides laterally through the limiting groove. The width of the limiting groove is exactly equal to the thickness of the scraper (45). An adsorption electromagnet (47) is provided on the side of the storage shell plate (44) away from the scraper (45). An iron strip (46) is provided on the side of the scraper (45) located inside the storage shell plate (44). The iron strip (46) and the adsorption electromagnet (47) are fixedly connected by a spring (48). A vibration motor (49) is installed on the upper end of the storage shell plate (44) away from the scraper (45). A rotary cylinder (51) is installed on one side of the annular housing (5), and the output shaft of the rotary cylinder (51) is located inside the annular housing (5) and connected to a sprayer (52); The sprayer (52) includes a spray plate (521), one side of which is densely covered with spray holes (522) for atomizing the original liquid. An elastic steel plate (523) is provided at the outer edge of the spray plate (521), a rubber pad (524) is provided on the outer side of the elastic steel plate (523), and an annular iron pad (526) is provided on the inner side of the elastic steel plate (523). An inwardly folding plate is provided on the upper side of the elastic steel plate (523), and the folding plate is fixedly provided at the upper edge of the spray plate (521). The inner side of the elastic steel plate (523) does not contact the outer edge of the spray plate (521). An annular electromagnet (525) corresponding to the annular iron pad (526) is provided on the outer edge of the spray plate (521). The attraction force of the annular electromagnet (525) to the annular iron pad (526) is greater than the elastic force of the elastic steel plate (523). When the power of the annular electromagnet (525) is turned off and the spray plate (521) is in a horizontal state, the elastic steel plate (523) uses its own elasticity to make the rubber pad (524) press against the inner wall of the annular shell (5). When the spray holes (522) on the spray plate (521) become blocked, the rotary cylinder (51) drives the spray plate (521) to rotate 180 degrees, and the original liquid will backwash the spray holes (522) on the spray plate (521).

2. The spray granulation dryer according to claim 1, characterized in that: When the spring (48) is in the reset state, the side of the scraper (45) away from the iron bar (46) is attached to the inner wall of the drying tower (1).

3. The spray granulation dryer according to claim 1, characterized in that: The attraction force of the electromagnet (47) to the iron bar (46) is greater than the elastic force of the spring (48). When the electromagnet (47) is powered on, the scraper (45) moves into the interior of the storage shell (44).

4. The spray granulation dryer according to claim 1, characterized in that: The outer wall of the spray pipe (3) is provided with a limiting sleeve (42) located below the tower cover (2). A collector ring (421) is installed on the outer wall of the limiting sleeve (42). The adsorption electromagnet (47) and the vibration motor (49) are both electrically connected to the collector ring (421) through wires.

5. A spray granulation dryer according to claim 1, characterized in that: The upper end of the spray pipe (3) is connected to a raw liquid feed pipe (31) for the raw liquid to pass through, and a hot air delivery pipe (32) for hot air to pass through is provided on one side of the spray pipe (3) above the tower cover (2).

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