A magnetically controlled induction heating pulse spray fluidized bed granulation device

Abstract

This invention proposes a magnetically controlled induction heating pulse spray fluidized bed granulation device, belonging to the field of spray granulation. It solves the problems of particle surface evaporation not being rapid and the inability to effectively separate magnetic particles from initial particles with a constant magnetic field strength. It includes a spray fluidized bed reactor, a liquid supply device, a dual-fluid nozzle, a pulse airflow generator, a magnetic field adjustment module, a particle recovery device, and a dust removal device. The dual-fluid nozzle is connected to both the liquid supply device and the spray fluidized bed reactor, and the pulse airflow generator is also connected to the spray fluidized bed reactor. A high-speed camera and data processing system collect particle position information and feed it back to the magnetic field control device. The magnetic field control device adjusts the magnetic field strength generated by the magnetic field generator and the power of the induction heating device. The spray fluidized bed reactor is connected to both the particle recovery device and the dust removal device. It enables rapid evaporation of moisture from the particle surface, and by controlling the magnetic field strength, the desired finished particles can be separated.

Description

Technical Field

[0001] This invention belongs to the field of spray granulation technology, and in particular relates to a magnetically controlled induction heating pulse spray fluidized bed granulation device. Background Technology

[0002] Spray fluidized bed granulation boasts high gas-solid mixing and heat transfer efficiency, enabling efficient particle coating and agglomeration. It is one of the most widely used granulation product development technologies, finding broad application in numerous fields including chemistry, energy conversion and storage, materials technology, pharmaceuticals, and the food industry. However, during granulation, particles easily agglomerate and form mesoscale structures under liquid conditions. These mesoscale structures not only affect particle flow and heat and mass transfer characteristics within the spray fluidized bed but also significantly impact granulation production efficiency and product quality.

[0003] Current spray fluidized bed granulation still has certain problems: the solution on the particle surface cannot be rapidly evaporated and dried, causing adhesion and agglomeration, which then accumulates in the annular gap and near-wall region, thus affecting particle production efficiency and particle product quality. Moreover, as spraying continues, the number of magnetic particles in the fluidized bed increases, and a constant magnetic field strength cannot effectively separate the magnetic particles from the initial particles, thus affecting particle production efficiency and particle product quality. Summary of the Invention

[0004] In view of this, in order to solve the problems that the solution on the particle surface cannot be quickly evaporated and dried, resulting in adhesion and agglomeration, and that a constant magnetic field strength cannot effectively separate magnetic particles from the initial particles, this invention proposes a magnetically controlled induction heating pulse spray fluidized bed granulation device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A magnetically controlled induction heating pulse spray fluidized bed granulation device, characterized in that it comprises:

[0007] A spray fluidized bed reactor, wherein the spray fluidized bed reactor is provided with an inlet and an outlet;

[0008] A liquid supply device and a dual-fluid nozzle, wherein the inlet and outlet of the dual-fluid nozzle are respectively connected to the liquid supply device and the spray fluidized bed reactor;

[0009] A pulsed airflow generator, wherein the pulsed airflow generator is connected to the spray fluidized bed reactor;

[0010] The magnetic field adjustment module includes a magnetic field generator, a magnetic field control device, a data processing system, a high-speed camera, and an induction heating device. The spray fluidized bed reactor is located within the magnetic field generated by the magnetic field generator, and the induction heating device can heat the spray fluidized bed reactor. The high-speed camera and data processing system can collect particle position information within the spray fluidized bed reactor and feed it back to the magnetic field control device. The magnetic field control device can adjust the intensity of the magnetic field generated by the magnetic field generator and the heating power of the induction heating device. By controlling the magnetic field intensity, the desired finished particles can be separated.

[0011] The particulate recovery device and the dust removal device are provided, with the discharge port connected to the particulate recovery device and the air outlet at the top of the spray fluidized bed reactor connected to the dust removal device.

[0012] As a preferred embodiment of the above-mentioned magnetically controlled induction heating pulse spray fluidized bed granulation device, the spray fluidized bed reactor includes a spray fluidized bed, an inner air chamber, and an air distribution plate. The air distribution plate is disposed between the spray fluidized bed and the inner air chamber. The air distribution plate has multiple air distribution holes, and the two ends of the air distribution holes are respectively connected to the spray fluidized bed and the inner air chamber. The inlet and outlet are respectively disposed on both sides of the spray fluidized bed. The dual-fluid nozzle is fixedly disposed on the air distribution plate, and the outlet of the dual-fluid nozzle is connected to the spray fluidized bed.

[0013] As a preferred embodiment of the above-mentioned magnetically controlled induction heating pulse spray fluidized bed granulation device, the angle between the extension direction of the air distribution holes of the air distribution plate and the vertical line of the air distribution plate is 0 to 15°.

[0014] As a preferred embodiment of the above-mentioned magnetically controlled induction heating pulse spray fluidized bed granulation device, the pulse airflow generating device includes a fan, an air heater, and an air velocity frequency regulating component, wherein the fan, air heater, air velocity frequency regulating component, and inner air chamber are connected in sequence.

[0015] As a preferred embodiment of the above-mentioned magnetically controlled induction heating pulse spray fluidized bed granulation device, the air velocity frequency adjustment component includes a pulse valve and a rotor flow meter, and the air heater, the pulse valve, the rotor flow meter and the inner air chamber are connected in sequence.

[0016] As a preferred embodiment of the above-mentioned magnetically controlled induction heating pulse spray fluidized bed granulation device, the pulse airflow generator further includes an air filter, the outlet of which is connected to the air inlet of the blower.

[0017] As a preferred embodiment of the above-mentioned magnetically controlled induction heating pulse spray fluidized bed granulation device, the liquid supply device includes a liquid storage tank and a peristaltic pump, wherein the inlet and outlet of the peristaltic pump are respectively connected to the liquid storage tank and the inlet of the dual-fluid nozzle.

[0018] As a preferred embodiment of the above-mentioned magnetically controlled induction heating pulse spray fluidized bed granulation device, the liquid supply device further includes a mass flow meter, which is disposed between the outlet of the peristaltic pump and the inlet of the dual-fluid nozzle.

[0019] As a preferred embodiment of the above-mentioned magnetically controlled induction heating pulse spray fluidized bed granulation device, the particle recovery device includes a double-layer screen and a bucket elevator, with the discharge port, the double-layer screen and the bucket elevator connected in sequence.

[0020] As a preferred embodiment of the above-mentioned magnetically controlled induction heating pulse spray fluidized bed granulation device, the dust removal device includes a cyclone separator and a bag filter, and the air outlet at the top of the spray fluidized bed reactor, the cyclone separator and the bag filter are connected in sequence.

[0021] Compared with the prior art, the beneficial effects of the magnetically controlled induction heating pulse spray fluidized bed granulation device provided by the present invention are:

[0022] 1. This invention provides a magnetically controlled induction heating pulse spray fluidized bed granulation device. The induction heating device can heat the spray fluidized bed reactor, and the magnetic field control device can adjust the heating power of the induction heating device according to the particle position information in the spray fluidized bed reactor fed back by the high-speed camera and data processing system, so that the moisture on the particle surface can be quickly evaporated.

[0023] 2. This invention provides a magnetically controlled induction heating pulse spray fluidized bed granulation device. In this device, the spray fluidized bed reactor is located within the magnetic field generated by a magnetic field generator. The magnetic field control device can adjust the intensity of the magnetic field generated by the magnetic field generator based on the particle position information within the spray fluidized bed reactor fed back by a high-speed camera and a data processing system. This enables the magnetic field intensity to adaptively change with the particle position information, thereby improving the quality of the granule product over time. Simultaneously, by controlling the magnetic field intensity, the desired finished granules are separated, improving the granule production rate and quality.

[0024] 3. The present invention provides a magnetically controlled induction heating pulse spray fluidized bed granulation device. In this device, a pulse airflow generator introduces pulse airflow into the spray fluidized bed reactor, which can improve the problem of uneven particle growth on a spatial scale.

[0025] 4. This invention provides a magnetically controlled induction heating pulse spray fluidized bed granulation device. The coated particles generated by this device enter a particle recovery device from the discharge port for recycling. A dust removal device ensures that the discharged hot air undergoes sufficient dust removal treatment, thereby achieving efficient granulation and a clean operating environment. Attached Figure Description

[0026] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the magnetically controlled induction heating pulse spray fluidized bed granulation device provided in a specific embodiment of the present invention.

[0028] In the picture:

[0029] 11. Inner air chamber; 12. Spray fluidized bed; 13. Air distribution plate; 121. Inlet; 122. Outlet;

[0030] 21. Liquid storage tank; 22. Peristaltic pump; 23. Mass flow meter;

[0031] 3. Dual-fluid nozzle;

[0032] 41. Air filter; 42. Fan; 43. Air heater; 44. Pulse valve; 45. Rotor flow meter;

[0033] 51. Magnetic field generator; 52. Data processing system; 53. Magnetic field control device; 54. High-speed camera; 55. Induction heating device;

[0034] 61. Double-layer screen; 62. Bucket elevator;

[0035] 71. Cyclone separator; 72. Bag filter;

[0036] 8. Gas outlet. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly 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.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0041] See Figure 1 This invention provides a magnetically controlled induction heating pulse spray fluidized bed granulation device. The device includes a spray fluidized bed reactor, a liquid supply device, a dual-fluid nozzle 3, a pulse airflow generator, a magnetic field regulating module, a particle recovery device, and a dust removal device. The spray fluidized bed reactor has an inlet 121 and an outlet 122. The inlet and outlet of the dual-fluid nozzle 3 are respectively connected to the liquid supply device and the spray fluidized bed reactor. The pulse airflow generator is connected to the spray fluidized bed reactor. The magnetic field regulating module includes a magnetic field generator 51, a magnetic field control device 53, and a data processing system 52. The high-speed camera 54 and the induction heating device 55 are located within the magnetic field generated by the magnetic field generator 51 in the spray fluidized bed reactor. The induction heating device 55 can heat the spray fluidized bed reactor. The high-speed camera 54 and the data processing system 52 can collect the particle position information in the spray fluidized bed reactor and feed it back to the magnetic field control device 53. The magnetic field control device 53 can adjust the intensity of the magnetic field generated by the magnetic field generator 51 and the heating power of the induction heating device 55. By controlling the magnetic field intensity, the expected finished particles can be separated. The discharge port 122 is connected to the particle recovery device, and the air outlet at the top of the spray fluidized bed reactor is connected to the dust removal device.

[0042] This magnetically controlled induction heating pulse spray fluidized bed granulation device is used for the preparation of magnetic particles. At the start of operation, initial particles enter the bottom of the spray fluidized bed reactor through the feed inlet 121 and accumulate. Air is supplied to the spray fluidized bed reactor by a pulse airflow generator. After the initial particles in the spray fluidized bed reactor are fully fluidized, the coating solution enters the dual-fluid nozzle 3 from the liquid supply device and is sprayed into the spray fluidized bed reactor. During the spray granulation process, the particle position information in the spray fluidized bed reactor is fed back to the magnetic field control device 53 via a high-speed camera 54 and a data processing system 52. The magnetic field control device 53 adjusts the magnetic field strength and the power of the induction heating device 55 based on the positional distribution of the coated particles and the initial particles. By heating the spray fluidized bed reactor, the solution on the surface of the coated particles is rapidly evaporated and dried, preventing the coated particles from sticking together and forming agglomerates, resulting in uniform particle growth. Furthermore, by controlling the magnetic field strength, the desired finished particles are separated, effectively achieving the separation of the coated particles and the initial particles. The generated coated particles enter the particle recycling device from the discharge port 122 for recycling. The dust removal device ensures that the discharged hot air undergoes sufficient dust removal treatment, thereby achieving efficient granulation and a clean operating environment.

[0043] This magnetically controlled induction heating pulse spray fluidized bed granulation device includes an induction heating device 55 that heats the spray fluidized bed reactor, and a magnetic field control device 53 that adjusts the heating power of the induction heating device 55 based on the particle position information within the spray fluidized bed reactor fed back by a high-speed camera 54 and a data processing system 52, enabling rapid evaporation of moisture from the particle surface. The spray fluidized bed reactor is located within the magnetic field generated by a magnetic field generator 51. The magnetic field control device 53 adjusts the intensity of the magnetic field generated by the magnetic field generator 51 based on the particle position information within the spray fluidized bed reactor fed back by the high-speed camera 54 and the data processing system 52, achieving adaptive changes in magnetic field intensity with particle position information. This improves the quality of the granule product over time and separates the desired finished granules by controlling the magnetic field intensity. A pulse airflow generator introduces pulse airflow into the spray fluidized bed reactor, which improves the problem of uneven particle growth on a spatial scale.

[0044] This magnetic induction heating pulse spray fluidized bed granulation device can achieve good fluidization of particles during the preparation of magnetic particles, effectively separate magnetic particles from initial particles, improve the production rate and quality of particles, avoid local adhesion of magnetic particles and effectively promote the internal circulation process of particles, and effectively avoid uneven particle growth.

[0045] In this magnetically controlled induction heating pulse spray fluidized bed granulation device, the magnetic force on the particles during particle recovery includes two parts: the magnetic gradient force and the interparticle magnetic force. When the particles are magnetized and do not collide directly, they are subjected to the magnetic force between them, which is divided into radial force F. r and tangential force Fθ Forces in two directions; the application of the magnetic force model is based on the following assumptions: (1) the particles are spherical; (2) the distance between particles is no greater than twice the sum of the particle diameters; (3) magnetic particles are applicable to soft magnetic materials; (4) the particles are ideal dipoles; (5) the electrostatic effect between particles is ignored. Magnetized ferromagnetic particles will generate a magnetic induction field, which is not only affected by the external magnetic field force, but also by the force of neighboring particles. If the relative position of adjacent magnetic particles is consistent with the direction of the magnetic field, the magnetic induction force between particles is attractive; if the relative position of adjacent magnetic particles is perpendicular to the direction of the magnetic field, it is repulsive. Among them, the particle recycling process mainly focuses on the gradient magnetic field force on the particles, ensuring that the gradient magnetic field force is greater than the gravity of the magnetic particles themselves, and ensuring the separation of magnetic particles. The formula for calculating the magnetic field gradient force is as follows:

[0046]

[0047] Where: χ e V is the effective magnetic susceptibility of the particle; p The volume of the magnetic particles is expressed in meters (m). 3 Real-time feedback can be obtained through a high-speed camera; V0 is the initial particle volume, in meters. 3 μ0 is the free permeability, in N / A. 2 M represents the magnetic field strength, measured in A / m. This represents the magnetic field strength gradient, measured in A / m. 2 .

[0048] In this embodiment, the magnetic particle size ranges from 0.1 mm to 5.0 mm. This setting ensures the production quality of particles within the spray fluidized bed reactor and guarantees the uniformity of particle growth.

[0049] In this embodiment, the spray fluidized bed reactor should be operated in shallow bed mode, with a bed height to diameter ratio of less than 0.3.

[0050] Specifically, the spray fluidized bed reactor includes a spray fluidized bed 12, an inner air chamber 11, and an air distribution plate 13. The air distribution plate 13 is disposed between the spray fluidized bed 12 and the inner air chamber 11, and has multiple air distribution holes. The two ends of the air distribution holes are connected to the spray fluidized bed 12 and the inner air chamber 11, respectively. The feed inlet 121 and the discharge outlet 122 are respectively disposed on both sides of the spray fluidized bed 12. The dual-fluid nozzle 3 is fixedly disposed on the air distribution plate 13, and the outlet of the dual-fluid nozzle 3 is connected to the spray fluidized bed 12. The initial particles are added to the bottom of the spray fluidized bed 12 through the feed inlet 121 and accumulate. The pulsed airflow in the inner air chamber 11 is sprayed into the spray fluidized bed 12 through the air distribution holes on the air distribution plate 13. The coating particles are fully mixed under the action of the pulsed airflow, which can avoid uneven drying phenomena such as agglomeration.

[0051] In this embodiment, the air distribution holes are circular holes, and multiple air distribution holes are evenly spaced.

[0052] Optionally, the angle between the extension direction of the air distribution holes of the air distribution plate 13 and the vertical line of the air distribution plate 13 is 0 to 15°. The opening ratio of the air distribution holes in the central area of ​​the air distribution plate 13 is 8%, and the opening ratio in the edge area is 12%. A mesh is laid on top of the air distribution plate 13 to prevent particles from falling.

[0053] Specifically, the pulsed airflow generating device includes a fan 42, an air heater 43, and an air velocity frequency regulating component, which are sequentially connected to the inner air chamber 11. Air is guided by the fan 42 into the air heater 43 for heating, and then the air velocity frequency regulating component adjusts the pulse frequency and amplitude of the airflow. The appropriate frequency and amplitude are adjusted according to the different particle product requirements, thereby improving the preparation and growth uniformity of the coating particles and preventing the coating particles from agglomerating.

[0054] Specifically, the air velocity and frequency regulation component includes a pulse valve 44 and a rotor flow meter 45. The air heater 43, pulse valve 44, rotor flow meter 45, and inner air chamber 11 are connected in sequence. By controlling the air supply velocity and frequency through the pulse valve 44 and rotor flow meter 45, the fluid disturbance and internal particle mixing are enhanced on a spatial scale, effectively preventing local overheating and uneven drying within the bed, while simultaneously achieving the goals of reducing air consumption and energy consumption.

[0055] In this embodiment, the pulsed gas flow generator delivers a jet gas velocity of 30 m / s to 100 m / s into the spray fluidized bed reactor; the gas pulse frequency ranges from 0 Hz to 20 Hz, preferably 10 Hz. This configuration ensures that the particles in the spray fluidized bed reactor enter a uniform fluidization state, thereby preventing the occurrence of poor particle fluidization.

[0056] Optionally, the pulse airflow generator also includes an air filter 41, the outlet of which is connected to the air inlet of the blower 42. Air is filtered through the filter before entering the blower 42, allowing clean air to enter the spray fluidized bed reactor.

[0057] Specifically, the liquid supply device includes a storage tank 21 and a peristaltic pump 22. The inlet and outlet of the peristaltic pump 22 are connected to the inlet of the storage tank 21 and the inlet of the dual-fluid nozzle 3, respectively. The peristaltic pump 22 pumps the coating solution in the storage tank 21 into the dual-fluid nozzle 3, which then sprays it into the spray fluidized bed 12.

[0058] Optionally, the liquid supply device also includes a mass flow meter 23, which is disposed between the outlet of the peristaltic pump 22 and the inlet of the dual-fluid nozzle 3. The solution flowing out of the outlet of the peristaltic pump 22 passes through the mass flow meter 23 and enters the dual-fluid nozzle 3 before being sprayed into the spray fluidized bed 12.

[0059] Optionally, the pellet recovery device includes a double-layer screen 61 and a bucket elevator 62, with the discharge port 122, the double-layer screen 61, and the bucket elevator 62 connected in sequence. The generated pellets enter the pellet recovery device through the discharge port 122 and are recovered by the double-layer screen 61 and the bucket elevator 62.

[0060] Specifically, the dust removal device includes a cyclone separator 71 and a bag filter 72, with the air outlet at the top of the spray fluidized bed reactor, the cyclone separator 71, and the bag filter 72 connected in sequence. This two-stage treatment ensures that the discharged hot air undergoes thorough dust removal, thereby achieving efficient granulation and a clean operating environment.

[0061] The working process of this magnetically controlled induction heating pulse spray fluidized bed granulation device is as follows: Air is filtered by air filter 41, then enters air heater 43 through fan 42 for heating, and then the air speed and frequency are controlled by pulse valve 44 and rotor flow meter 45. The air flows into inner air chamber 11 through pipeline and is supplied to spray fluidized bed 12 through air distribution holes of air distribution plate 13. Coating solution is pumped from storage tank 21 by peristaltic pump 22, passes through mass flow meter 23, and enters dual-fluid nozzle 3 to be sprayed into spray fluidized bed 12. The particle position information within spray fluidized bed 12 is obtained through... The high-speed camera 54 and the data processing system 52 feed back to the magnetic field control device 53, which then adjusts the magnetic field strength generated by the magnetic field generator 51 and the heating power of the induction heating device 55. At the same time, the expected finished particles are separated by controlling the magnetic field strength. The initial particles enter the spray fluidized bed 12 from the feed port 121, and the generated particles enter the double-layer screen 61 from the discharge port 122 for screening and then enter the bucket elevator 62 for recycling. The hot air is discharged after passing through the two-stage dust removal devices of the cyclone separator 71 and the bag filter 72.

[0062] Obviously, the above-disclosed embodiments of the present invention are merely for illustrating the present invention. The embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. It is neither necessary nor possible to exhaustively describe all implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A magnetically controlled induction heating pulse spray fluidized bed granulation device, characterized in that, include: A spray fluidized bed reactor, wherein the spray fluidized bed reactor is provided with an inlet (121) and an outlet (122); The liquid supply device and the dual-fluid nozzle (3) are connected to the liquid supply device and the spray fluidized bed reactor, respectively, through the inlet and outlet of the dual-fluid nozzle (3). A pulsed airflow generator, wherein the pulsed airflow generator is connected to the spray fluidized bed reactor; The magnetic field adjustment module includes a magnetic field generator (51), a magnetic field control device (53), a data processing system (52), a high-speed camera (54), and an induction heating device (55). The spray fluidized bed reactor is located within the magnetic field generated by the magnetic field generator (51), and the induction heating device (55) can heat the spray fluidized bed reactor. The high-speed camera (54) and the data processing system (52) can collect particle position information in the spray fluidized bed reactor and feed it back to the magnetic field control device (53). The magnetic field control device (53) can adjust the intensity of the magnetic field generated by the magnetic field generator (51) and the heating power of the induction heating device (55). By controlling the magnetic field intensity, the desired finished product particles can be separated. The particle recovery device and the dust removal device are provided. The discharge port (122) is connected to the particle recovery device, and the air outlet at the top of the spray fluidized bed reactor is connected to the dust removal device.

2. The magnetically controlled induction heating pulse spray fluidized bed granulation device according to claim 1, characterized in that: The spray fluidized bed reactor includes a spray fluidized bed (12), an inner air chamber (11), and an air distribution plate (13). The air distribution plate (13) is disposed between the spray fluidized bed (12) and the inner air chamber (11). The air distribution plate (13) is provided with a plurality of air distribution holes. The two ends of the air distribution holes are respectively connected to the spray fluidized bed (12) and the inner air chamber (11). The feed inlet (121) and the discharge outlet (122) are respectively disposed on both sides of the spray fluidized bed (12). The dual-fluid nozzle (3) is fixedly disposed on the air distribution plate (13). The outlet of the dual-fluid nozzle (3) is connected to the spray fluidized bed (12).

3. The magnetically controlled induction heating pulse spray fluidized bed granulation device according to claim 2, characterized in that: The angle between the extension direction of the air distribution holes of the air distribution plate (13) and the vertical line of the air distribution plate (13) is 0 to 15°.

4. The magnetically controlled induction heating pulse spray fluidized bed granulation device according to claim 2, characterized in that: The pulse airflow generating device includes a fan (42), an air heater (43), and an air velocity frequency regulating component, which are connected in sequence to the inner air chamber (11).

5. The magnetically controlled induction heating pulse spray fluidized bed granulation device according to claim 4, characterized in that: The air velocity frequency adjustment component includes a pulse valve (44) and a rotor flow meter (45), and the air heater (43), the pulse valve (44), the rotor flow meter (45) and the inner air chamber (11) are connected in sequence.

6. The magnetically controlled induction heating pulse spray fluidized bed granulation device according to claim 4, characterized in that: The pulse airflow generator also includes an air filter (41), the outlet of which is connected to the air inlet of the fan (42).

7. The magnetically controlled induction heating pulse spray fluidized bed granulation device according to claim 1, characterized in that: The liquid supply device includes a liquid storage tank (21) and a peristaltic pump (22), the inlet and outlet of which are respectively connected to the liquid storage tank (21) and the inlet of the dual-fluid nozzle (3).

8. The magnetically controlled induction heating pulse spray fluidized bed granulation device according to claim 7, characterized in that: The liquid supply device also includes a mass flow meter (23), which is located between the outlet of the peristaltic pump (22) and the inlet of the dual-fluid nozzle (3).

9. The magnetically controlled induction heating pulse spray fluidized bed granulation device according to claim 1, characterized in that: The particle recovery device includes a double-layer screen (61) and a bucket elevator (62), and the discharge port (122), the double-layer screen (61) and the bucket elevator (62) are connected in sequence.

10. The magnetically controlled induction heating pulse spray fluidized bed granulation device according to claim 1, characterized in that: The dust removal device includes a cyclone separator (71) and a bag filter (72), and the air outlet at the top of the spray fluidized bed reactor, the cyclone separator (71) and the bag filter (72) are connected in sequence.

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