Magnetic control induction heating pulse spray fluidized bed granulation device

Abstract

The invention provides a magnetic control induction heating pulse spray fluidized bed granulation device, and belongs to the field of spray granulation. The problems that the surfaces of the particles cannot be evaporated rapidly, and the magnetic particles and initial particles cannot be effectively separated due to the constant magnetic field intensity are solved. The device comprises a spray fluidized bed reactor, a liquid supply device, a double-fluid nozzle, a pulse airflow generation device, a magnetic field adjusting module, a particle recovery device and a dust removal device, the double-fluid nozzle is communicated with the liquid supply device and the spray fluidized bed reactor, and the pulse airflow generation device is communicated with the spray fluidized bed reactor; the high-speed camera and the data processing system can collect particle position information and feed back the information to the magnetic field control device, the magnetic field control device adjusts the magnetic field intensity generated by the magnetic field generator and the power of the induction heating device, and the spray fluidized bed reactor is connected with the particle recovery device and the dust removal device. Moisture on the surfaces of particles can be quickly evaporated to dryness, and expected finished particles can be separated by controlling the magnetic field intensity.

Description

Technical Field

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

[0002] Spray fluidized bed granulation has high gas-solid mixing and heat transfer efficiency, can efficiently achieve particle coating and agglomeration, and is one of the most widely used particle product development technologies. It is widely used in many fields of chemistry, energy conversion and storage, material technology, pharmaceuticals and food industries. During the granulation process, particles are easily bonded and form mesoscale structures such as agglomerates under the action of liquid. The existence of mesoscale structures not only affects the particle flow and heat and mass transfer characteristics in the spray fluidized bed, but also seriously affects the particle production efficiency and product quality.

[0003] The current spray fluidized bed granulation still has certain problems: the solution on the surface of the particles cannot evaporate and dry quickly, and sticks to form agglomerates, which then accumulate in the annular gap area and near-wall area, thereby affecting the particle production efficiency and particle product quality. Moreover, as the spraying proceeds, the number of magnetic particles in the fluidized bed increases, and the constant magnetic field strength cannot effectively achieve the effective separation of magnetic particles and initial particles, thereby affecting the particle production efficiency and particle product quality. Summary of the invention

[0004] In view of this, in order to solve the problem that the solution on the surface of the particles cannot evaporate and dry quickly and sticks to form agglomerates, and the constant magnetic field strength cannot effectively separate the magnetic particles from the initial particles, the present invention proposes a magnetically controlled induction heating pulse spray fluidized bed granulation device.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[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 two-fluid nozzle, wherein an inlet and an outlet of the two-fluid nozzle are respectively connected to the liquid supply device and the spray fluidized bed reactor;

[0009] a pulse airflow generating device, the pulse airflow generating device being in communication with the spray fluidized bed reactor;

[0010] A magnetic field regulating module, comprising a magnetic field generator, a magnetic field control device, a data processing system, a high-speed camera and an induction heating device, wherein the spray fluidized bed reactor is located in 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 the data processing system can collect particle position information in the spray fluidized bed reactor and feed it back to the magnetic field control device, and 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, and the expected finished particles can be separated by controlling the magnetic field intensity;

[0011] A particle recovery device and a dust removal device, the material discharge port is connected to the particle recovery device, and the gas outlet at the top of the spray fluidized bed reactor is 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 wind chamber and an air distribution plate, the air distribution plate is arranged between the spray fluidized bed and the inner wind chamber, the air distribution plate 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 and the inner wind chamber, the feed inlet and the feed outlet are respectively arranged on both sides of the spray fluidized bed, the dual-fluid nozzle is fixedly arranged 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 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 speed frequency regulating component, and the fan, air heater and air speed frequency regulating component are connected to the inner wind chamber 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 wind chamber are connected in sequence.

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

[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, and 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 solution of the above-mentioned magnetically controlled induction heating pulse spray fluidized bed granulation device, the liquid supply device also includes a mass flow meter, and the mass flow meter is arranged between the outlet of the peristaltic pump and the inlet of the dual-fluid nozzle.

[0019] As a preferred solution 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, and the discharge port, the double-layer screen and the bucket elevator are 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 dust collector, and the air outlet at the top of the spray fluidized bed reactor, the cyclone separator and the bag dust collector 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. The present invention provides a magnetically controlled induction heating pulse spray fluidized bed granulation device, wherein the magnetically controlled induction heating pulse spray fluidized bed granulation device has an induction heating device that can heat the spray fluidized bed reactor, and a magnetic field control device that 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 a high-speed camera and a data processing system, thereby enabling the moisture on the surface of the particles to evaporate rapidly.

[0023] 2. The present invention provides a magnetically controlled induction heating pulse spray fluidized bed granulation device, in which the spray fluidized bed reactor is located in the magnetic field generated by a magnetic field generator, and the magnetic field control device can adjust the intensity of the magnetic field generated by the magnetic field generator according to the particle position information in the spray fluidized bed reactor fed back by a high-speed camera and a data processing system, thereby realizing adaptive changes in the magnetic field intensity with the particle position information, improving the quality of the particle product from a time scale, and at the same time separating the expected finished particles by controlling the magnetic field intensity, thereby improving the production rate and quality of the particles.

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

[0025] 4. The present invention provides a magnetically controlled induction heating pulse spray fluidized bed granulation device, in which the generated coating particles enter a particle recovery device from a discharge port for recovery, and a dust removal device is used to ensure that the discharged hot air is sufficiently dust-removed, thereby achieving efficient granulation and a clean operating environment. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0028] In the figure:

[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. Two-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 dust collector;

[0036] 8. Gas outlet. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] See also Figure 1 The present invention provides a magnetically controlled induction-heated pulse spray fluidized bed granulating device, which includes a spray fluidized bed reactor, a liquid supply device, a dual-fluid nozzle 3, a pulse airflow generating device, a magnetic field regulating module, a particle recovery device and a dust removal device. The spray fluidized bed reactor is provided with 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 generating device 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, a data processing system 52, A high-speed camera 54 and an induction heating device 55, the spray fluidized bed reactor is located in 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 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, and the expected finished particles can be separated by controlling the magnetic field intensity; 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] The magnetically controlled induction heating pulse spray fluidized bed granulation device is used for the preparation of magnetic particles. At the beginning of operation, the initial particles enter the bottom of the spray fluidized bed reactor through the feed port 121 and accumulate, and air is supplied to the spray fluidized bed reactor by the pulse airflow generating device; when the initial particles in the spray fluidized bed reactor are fully fluidized, the coating solution enters the double 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 through the high-speed camera 54 and the data processing system 52, and the magnetic field control device 53 adjusts the magnetic field strength and the power of the induction heating device 55 according to the position distribution of the coating particles and the initial particles, and ensures that the surface solution of the coating particles evaporates and dries quickly by heating the spray fluidized bed reactor, avoids the adhesion of the coating particles to form agglomeration, and makes the particles grow evenly, and separates the expected finished particles by controlling the magnetic field strength, effectively realizing the effective separation of the coating particles and the initial particles. The generated coating particles enter the particle recovery device from the discharge port 122 for recovery, and the dust removal device ensures that the discharged hot air is fully dust-removed, thereby achieving efficient granulation and a clean operating environment.

[0043] The magnetically controlled induction heating pulse spray fluidized bed granulating device, the induction heating device 55 can heat the spray fluidized bed reactor, the magnetic field control device 53 can adjust the heating power of the induction heating device 55 according to the particle position information in the spray fluidized bed reactor fed back by the high-speed camera 54 and the data processing system 52, so that the moisture on the surface of the particles can be quickly evaporated; the spray fluidized bed reactor is located in the magnetic field generated by the magnetic field generator 51, the magnetic field control device 53 can adjust the intensity of the magnetic field generated by the magnetic field generator 51 according to the particle position information in the spray fluidized bed reactor fed back by the high-speed camera 54 and the data processing system 52, so as to realize the adaptive change of the magnetic field intensity with the particle position information, improve the particle product quality from the time scale, and separate the expected finished particles by controlling the magnetic field intensity; the pulse airflow generating device introduces a pulse airflow into the spray fluidized bed reactor, which can improve the problem of uneven particle growth from the spatial scale.

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

[0045] In the magnetically controlled induction heating pulse spray fluidized bed granulation device, the magnetic field force on the particles during the particle recovery process includes two parts: magnetic field gradient force and inter-particle magnetic field force. When the particles are magnetized and there is no direct collision between the particles, the particles are acted upon by the magnetic field force, which is divided into radial force F r and the tangential force Fθ Forces in two directions; the application of the magnetic field force model is based on the following assumptions: (1) the particles are spherical; (2) the distance between particles is no more than twice the sum of the particle diameters; (3) magnetic particles are suitable for particles of soft magnetic materials; (4) the particles are ideal dipoles; (5) the electrostatic effect between particles is ignored. The 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 adjacent particles. If the relative position of adjacent magnetic particles is consistent with the direction of the magnetic field, the magnetic induction force between the particles manifests as an attractive force; if the relative position of adjacent magnetic particles is perpendicular to the direction of the magnetic field, it manifests as a repulsive force. Among them, the particle recovery 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 magnetic field gradient force calculation formula is as follows:

[0046]

[0047] Where: e is the effective magnetic susceptibility of the particle; V p is the volume of the magnetic particles, in m 3 , which can be fed back in real time by a high-speed camera; V0 is the volume of the initial particle, in m 3 ; μ0 is the vacuum permeability, unit is N / A 2 ; M is the magnetic field strength, unit is A / m; is the magnetic field intensity gradient, in A / m 2 .

[0048] In this embodiment, the particle size of the magnetic particles ranges from 0.1 mm to 5.0 mm. This arrangement can ensure the production quality of the particles in the spray fluidized bed reactor and ensure the uniformity of particle growth.

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

[0050] Specifically, the spray fluidized bed reactor includes a spray fluidized bed 12, an inner wind chamber 11 and an air distribution plate 13. The air distribution plate 13 is arranged between the spray fluidized bed 12 and the inner wind 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 wind chamber 11. The feed inlet 121 and the discharge port 122 are respectively arranged on both sides of the spray fluidized bed 12. The twin-fluid nozzle 3 is fixedly arranged on the air distribution plate 13, and the outlet of the twin-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 from the feed inlet 121 and accumulated. The pulse airflow in the inner wind 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 pulse airflow, which can avoid uneven drying phenomena such as agglomeration.

[0051] In this embodiment, the air distribution holes are circular holes, and a plurality of 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 0-15°. The opening rate of the air distribution holes in the central area of ​​the air distribution plate 13 is 8%, and the opening rate in the edge area is 12%. A mat net is laid above the air distribution plate 13 to prevent particles from falling.

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

[0054] Specifically, 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 sequentially connected. The air supply velocity and frequency of the air flow are controlled by the pulse valve 44 and the rotor flow meter 45, so as to enhance the fluid disturbance and the internal mixing of the particles from the spatial scale, effectively prevent the local overheating and uneven drying in the bed, and achieve the goal of reducing air consumption and energy consumption.

[0055] In this embodiment, the pulse gas flow generating device sprays gas velocity into the spray fluidized bed reactor in the range of 30m / s to 100m / s; the gas pulse frequency range is 0Hz to 20Hz, preferably 10Hz. Such an arrangement can ensure that the particles in the spray fluidized bed reactor enter a uniform fluidized state, thereby preventing the occurrence of poor fluidization of particles.

[0056] Optionally, the pulse airflow generating device further comprises an air filter 41, and the outlet of the air filter 41 is connected to the air inlet of the fan 42. The air is filtered through the filter and then enters the fan 42, so that clean air can enter the spray fluidized bed reactor.

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

[0058] Optionally, the liquid supply device further includes a mass flow meter 23, which is disposed between the outlet of the peristaltic pump 22 and the inlet of the two-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 two-fluid nozzle 3 before being sprayed into the spray fluidized bed 12.

[0059] Optionally, 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. The generated particles enter the particle recovery device through the discharge port 122, and the particles 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 dust collector 72. The air outlet at the top of the spray fluidized bed reactor, the cyclone separator 71 and the bag dust collector 72 are connected in sequence. The two-stage treatment ensures that the exhausted hot air is fully dust-removed, thereby achieving efficient granulation and a clean operating environment.

[0061] The working process of the magnetically controlled induction heating pulse spray fluidized bed granulation device is as follows: air is filtered by an air filter 41, passes through a fan 42, enters an air heater 43 for heating, and then is controlled by a pulse valve 44 and a rotor flowmeter 45 for air velocity and frequency, flows into an inner wind chamber 11 through a pipeline, and is supplied to the spray fluidized bed 12 through the air distribution holes of an air distribution plate 13; the coating solution is pumped out of a liquid storage tank 21 by a peristaltic pump 22, passes through a mass flowmeter 23, enters a dual-fluid nozzle 3, and is sprayed into the spray fluidized bed 12; the particle position information in the spray fluidized bed 12 is obtained by The high-speed camera 54 and the data processing system 52 are fed back to the magnetic field control device 53, and then the magnetic field control device 53 adjusts the magnetic field strength generated by the magnetic field generator 51 and the heating power of the induction heating device 55, and at the same time separates the expected finished particles by controlling the magnetic field strength; the initial particles enter the spray fluidized bed 12 from the feed inlet 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 recovery; the hot air is discharged after passing through the two-stage dust removal devices of the cyclone separator 71 and the bag dust collector 72.

[0062] Obviously, the embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in 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); A liquid supply device and a two-fluid nozzle (3), wherein an inlet and an outlet of the two-fluid nozzle (3) are respectively connected to the liquid supply device and the spray fluidized bed reactor; a pulse airflow generating device, the pulse airflow generating device being in communication with the spray fluidized bed reactor; A magnetic field regulating module comprises 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 in the magnetic field generated by the magnetic field generator (51); 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); and the expected finished particles can be separated by controlling the magnetic field intensity; A particle recovery device and a dust removal device, the discharge port (122) is connected to the particle recovery device, and the gas 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 is characterized in that: The spray fluidized bed reactor comprises a spray fluidized bed (12), an inner wind chamber (11) and an air distribution plate (13); the air distribution plate (13) is arranged between the spray fluidized bed (12) and the inner wind chamber (11); the air distribution plate (13) is provided with a plurality of air distribution holes; two ends of the air distribution holes are respectively connected to the spray fluidized bed (12) and the inner wind chamber (11); the material inlet (121) and the material outlet (122) are respectively arranged on two sides of the spray fluidized bed (12); the dual-fluid nozzle (3) is fixedly arranged on the air distribution plate (13); and 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 is characterized in that: The angle between the extension direction of the air distribution holes of the air distribution plate (13) and a vertical line of the air distribution plate (13) is 0 to 15 degrees.

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

5. The magnetically controlled induction heating pulse spray fluidized bed granulation device according to claim 4 is characterized in that: The air speed frequency regulating component comprises 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 is characterized in that: The pulse airflow generating device further comprises an air filter (41), the outlet of the air filter (41) being in communication with the air inlet of the fan (42).

7. The magnetically controlled induction heating pulse spray fluidized bed granulation device according to claim 1 is characterized in that: The liquid supply device comprises a liquid storage tank (21) and a peristaltic pump (22), wherein an inlet and an outlet of the peristaltic pump (22) 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 is characterized in that: The liquid supply device further comprises a mass flow meter (23), and the mass flow meter (23) is arranged 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 comprises 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 comprises a cyclone separator (71) and a bag dust collector (72), and the gas outlet at the top of the spray fluidized bed reactor, the cyclone separator (71) and the bag dust collector (72) are connected in sequence.

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