Fluidized bed granulation device

Abstract

The utility model relates to the technical field of fertilizer granulation, and provides a fluidized bed granulation device which comprises a granulator, the granulator comprises a bed body, and the bed body is divided into a granulation bin and a cooling bin; the granulation bin and the cooling bin are both provided with fluidization air ports, and the granulation bin is provided with an atomization port; the granulation bin is communicated with the cooling bin; a cooling channel is formed in the granulation bin and / or the cooling bin, and at least one side of the cooling channel is a cooling plate; a heat exchange pipe is arranged on the cooling plate and provided with an inlet and an outlet. According to the fluidized bed granulation device disclosed by the utility model, fluidizing air is introduced into the fluidizing air port, calcium ammonium nitrate melt enters the granulation bin through the atomizing port, and after the atomized calcium ammonium nitrate melt enters the granulation bin, water in the calcium ammonium nitrate melt is evaporated and quickly crystallized to form calcium ammonium nitrate particles; under the action of the fluidizing air flow, the calcium ammonium nitrate particles are in a fluidizing state and enter the cooling bin.

Description

Technical Field

[0001] The utility model relates to the technical field of fertilizer granulation, in particular to a fluidized bed granulation device. Background Art

[0002] Calcium ammonium nitrate is a new type of high-efficiency compound fertilizer containing nitrogen and water-soluble calcium. It has good safety performance, is easy to store and transport, has a fast fertilizer effect, and has the characteristics of rapid nitrogen replenishment. It is widely used in crops planted in greenhouses and large-scale farmlands. More than 90% of calcium ammonium nitrate is nitrate ammonia, and the rest is ammonium ammonia, containing 25% water-soluble calcium oxide. Due to the presence of calcium, the nitrogen content in calcium ammonium nitrate is lower than that of ordinary ammonium nitrate, but its hygroscopicity is lower than that of ordinary ammonium nitrate, thereby improving the agglomeration and thermal stability. It is not easy to cause fire and explosion during storage and transportation. It is a safer nitrate nitrogen fertilizer than ammonium nitrate.

[0003] Since calcium ammonium nitrate is a neutral fertilizer, it is suitable for a variety of soils, especially acidic soils. It can improve the soil, increase the aggregate structure, and prevent the soil from caking. Calcium ammonium nitrate contains calcium, which is one of the essential nutrients for crop growth and development and plays an important role in the physiological process of crops.

[0004] At present, the granulation devices for producing calcium ammonium nitrate particles in China mainly include: spray granulation device, disc granulation device, and drum granulation device. Spray granulation is a method for preparing small spherical pellets, in which the molten material produces a droplet flow through a device called a spray head, and is continuously cooled and solidified by a cooling gas (typically air) during the falling process to generate particles. The particles produced by spray granulation are uniform in shape, but the exhaust gas volume is large and the dust content is high. They must be treated before being discharged into the atmosphere. The exhaust gas treatment is difficult and the environmental pollution is serious. The disc granulation device has the disadvantages of being difficult to collect production dust and smoke, and having a low output, and it is difficult to operate continuously and stably for a long period of time. The drum granulation device has a lot of returned material, is easy to agglomerate, has a lot of dust, and has high energy consumption. Utility Model Content

[0005] The utility model provides a fluidized bed granulating device for realizing fertilizer granulation.

[0006] The utility model provides a fluidized bed granulation device, comprising:

[0007] The granulator comprises a bed body, wherein the bed body is divided into a cooling bin and a granulation bin; the granulation bin and the cooling bin are both provided with fluidizing air ports, and the granulation bin is provided with an atomization port; the granulation bin and the cooling bin are communicated with each other; a cooling channel is formed in the granulation bin and / or the cooling bin, and at least one side of the cooling channel is a cooling plate; a heat exchange tube is provided on the cooling plate, and the heat exchange tube has an inlet and an outlet.

[0008] According to a fluidized bed granulation device provided by the utility model, the cooling plates include at least two, and the cooling channel is formed between the two cooling plates.

[0009] According to a fluidized bed granulation device provided by the utility model, at least two cooling channels are provided.

[0010] According to a fluidized bed granulation device provided by the utility model, the granulation bin is divided into at least two granulation chambers, the granulation chamber is provided with the atomization port, and the bottom of the granulation chamber is provided with a fluidizing plate.

[0011] According to a fluidized bed granulation device provided by the utility model, the cooling bin is divided into at least one cooling chamber, and a fluidizing plate is arranged at the bottom of the cooling chamber.

[0012] According to a fluidized bed granulation device provided by the utility model, it also includes an atomizing fan and an atomizer, the atomizer includes a solution pipeline and an atomizing air pipeline, the solution pipeline is arranged inside the atomizing air pipeline, one end of the atomizing air pipeline is connected to the air outlet of the atomizing fan, and the other end is connected to the atomizing port.

[0013] According to a fluidized bed granulation device provided by the utility model, it also includes an atomizing air heater and a solution feed pump. The atomizing air heater is connected to the atomizing air fan, and the solution feed pump is arranged on the solution pipeline.

[0014] According to a fluidized bed granulation device provided by the utility model, when the cooling channel is provided in both the granulation bin and the cooling bin, the cooling channel of the granulation bin is connected with the cooling channel of the cooling bin, and a particle outlet is provided at the end of the cooling channel of the cooling bin.

[0015] According to a fluidized bed granulation device provided by the utility model, it also includes a bucket elevator, a safety screen and a product cooler, the safety screen is connected to the cooling bin, the safety screen is connected to the bucket elevator, and the bucket elevator is connected to the inlet of the granulation bin.

[0016] According to the fluidized bed granulation device provided by the utility model, it also includes a scrubber and an induced draft fan, the scrubber is connected to the top of the granulator, and the scrubber is connected to the induced draft fan.

[0017] The utility model discloses a fluidized bed granulating device. Fluidizing air is introduced into a fluidizing air port. Calcium ammonium nitrate melt enters a granulating bin through an atomizing port. After the atomized calcium ammonium nitrate melt enters the granulating bin, water in the calcium ammonium nitrate melt evaporates and rapidly crystallizes to form calcium ammonium nitrate particles. Under the action of the fluidizing air flow, the calcium ammonium nitrate particles present a fluidized state, and the calcium ammonium nitrate particles enter a cooling bin.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic structural diagram of a fluidized bed granulation device provided in an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a granulator of a fluidized bed granulation device provided in an embodiment of the utility model.

[0022] Reference numerals:

[0023] 100, granulator; 110, granulation bin; 111, granulation chamber; 120, cooling bin; 130, cooling plate;

[0024] 210, fluidizing air outlet; 220, atomizing outlet; 230, atomizing air duct; 240, solution duct;

[0025] 310. a first fluidizing fan; 320. a fluidizing air heater;

[0026] 410, atomizing fan; 420, atomizing air heater; 430, solution feed pump;

[0027] 510, bucket elevator; 520, safety screen; 530, product cooler;

[0028] 610. Scrubber; 620. Draft fan. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0032] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0034] Fluidized bed granulation device is a kind of equipment commonly used to prepare granular materials. Its working principle is to use the fluidization effect of gas or liquid to suspend the material, and spray the binder on the material by spraying or spraying to form particles.

[0035] See also Figure 1 The embodiment of the utility model provides a fluidized bed granulation device, including a granulator 100, the granulator 100 includes a bed body, the bed body is divided into a granulation bin 110 and a cooling bin 120; the granulation bin 110 and the cooling bin 120 are both provided with a fluidizing air port 210, and the granulation bin 110 is provided with an atomization port 220; the granulation bin 110 and the cooling bin 120 are connected; a cooling channel is formed in the granulation bin 110 and / or the cooling bin 120, and at least one side of the cooling channel is a cooling plate 130; a heat exchange tube is provided on the cooling plate 130, and the heat exchange tube has an inlet and an outlet.

[0036] Fluidizing air is introduced into the fluidizing air port 210, and the calcium ammonium nitrate melt enters the granulation bin 110 through the atomizing port 220. The water in the calcium ammonium nitrate melt evaporates and rapidly crystallizes to form calcium ammonium nitrate particles. Under the action of the fluidizing air flow, the calcium ammonium nitrate particles present a fluidized state, and the calcium ammonium nitrate particles enter the cooling bin 120. In this process, a cooling medium is introduced into the inlet of the heat exchange tube, and the cooling channel plays a role in cooling.

[0037] A cooling channel is formed in the granulation bin 110 and / or the cooling bin 120. It is understandable that the cooling channel is provided inside both the granulation bin 110 and the cooling bin 120, or the cooling channel is provided inside any one of the granulation bin 110 and the cooling bin 120. In the case where the cooling bin 120 is not provided with a cooling channel, low-temperature fluidizing air is introduced into the fluidizing air port 210 of the cooling bin 120, which can also dry and cool the calcium ammonium nitrate particles.

[0038] In one embodiment, the cooling plates 130 include at least two, and a cooling channel is formed between the two cooling plates 130. The two cooling plates 130 can increase the cooling effect, and the cooling plates 130 located on both sides can evenly cool the calcium ammonium nitrate particles flowing in the cooling channel.

[0039] Of course, a cooling plate 130 and the side wall of the granulator (100) may form a cooling channel.

[0040] In one embodiment, at least two cooling channels are provided, and a plurality of cooling channels are arranged in parallel in the granulation bin 110 or the cooling bin 120. The cooling plate 130 separates the calcium ammonium nitrate particles, which is beneficial to the uniform distribution of the calcium ammonium nitrate particles and facilitates the drying of the calcium ammonium nitrate particles. For example, three cooling channels are provided, namely the first cooling channel, the second cooling channel and the third cooling channel, and the first cooling channel, the second cooling channel and the third cooling channel are arranged in parallel. Two cooling plates are provided, namely the first cooling plate and the second cooling plate; the first cooling plate and the second cooling plate are arranged inside the granulator 100, a first cooling channel is formed between the first cooling plate and the inner wall of the granulator 100, a second cooling channel is formed between the first cooling plate and the second cooling plate, and a third cooling channel is formed between the second cooling plate and the inner wall of the granulator 100.

[0041] Wherein, when both the granulation bin 110 and the cooling bin 120 are provided with cooling channels, the cooling channels of the granulation bin 110 are connected with the cooling channels of the cooling bin 120, and a particle outlet is provided at the end of the cooling channel of the cooling bin 120, which is conducive to the flow of calcium ammonium nitrate particles from the cooling channel of the granulation bin 110 to the cooling channel of the cooling bin 120, and facilitates the flow of calcium ammonium nitrate particles. The first cooling plate and the second cooling plate may be provided in both the granulation bin 110 and the cooling bin 120.

[0042] In one embodiment, the heat exchange tubes are arranged along the length direction of the cooling channel to reduce the temperature difference at various positions of the cooling channel and facilitate heat exchange.

[0043] See also Figure 2 In one embodiment, the granulation bin 110 is divided into at least two granulation chambers 111, and the granulation chamber 111 is provided with an atomizing port 220 and a fluidizing port 210; for example, the granulation bin 110 is divided into two granulation chambers 111, and each granulation chamber 111 is correspondingly provided with an atomizing port 220 and a fluidizing port 210; a fluidizing plate is provided at the bottom of the granulation chamber 111, and at the beginning, the calcium ammonium nitrate molten liquid is atomized and sprayed onto the fluidizing plate through the atomizing port 220, and the water of the calcium ammonium nitrate molten liquid evaporates and quickly crystallizes to form calcium ammonium nitrate particles; under the action of the fluidizing wind introduced into the fluidizing port 210, the calcium ammonium nitrate particles are in a fluidized state, and the calcium ammonium nitrate particles flow on the cooling channel to accelerate the cooling of the calcium ammonium nitrate particles.

[0044] In one embodiment, the cooling chamber 120 is divided into at least one cooling chamber, and the cooling chamber is provided with a fluidizing air port 210; for example, the cooling chamber 120 is divided into two cooling chambers, and each cooling chamber is correspondingly provided with a fluidizing air port 210;

[0045] The embodiment of the utility model also includes an atomizing fan and an atomizer, wherein the atomizer includes a solution pipeline 240 and an atomizing wind pipeline 230, wherein the solution pipeline 240 is arranged inside the atomizing wind pipeline 230, wherein one end of the atomizing wind pipeline 230 is connected to the air outlet of the atomizing fan 410, and the other end is connected to the atomizing port 220. The atomizing fan 410 introduces atomizing wind into the atomizing wind pipeline 230, and introduces calcium ammonium nitrate molten liquid into the solution pipeline 240, and the calcium ammonium nitrate molten liquid and the atomizing wind act at the atomizing port 220, so that the calcium ammonium nitrate molten liquid is atomized. Of course, in other embodiments, the atomizing equipment in other prior arts can also be used to atomize the calcium ammonium nitrate molten liquid and then introduce it into the atomizing port 220, and the embodiment of the utility model is not particularly limited to this.

[0046] The embodiment of the utility model also includes an atomizing air heater 420 and a solution feed pump 430, and the atomizing air heater 420 is connected to the atomizing fan 410; it can be understood that the diameter of the atomizing air duct 230 is greater than the diameter of the solution duct 240, and the solution feed pump 430 is arranged at one end of the solution duct 240, and the other end passes through the side wall of the atomizing air duct 230 to enter the interior of the atomizing air duct 230; in order to ensure the sealing of the atomizing air duct 230, the atomizing air duct 230 and the solution duct 240 are sealed and connected; the solution feed pump 430 delivers the molten calcium ammonium nitrate to the solution duct 240, and the atomizing air heater 420 is a heater in the prior art, for example, the atomizing air heater 420 includes a heating container and a heating wire, the heating wire is arranged on the heating container, and the heating container is connected to the atomizing fan 410 and the granulation bin 110; the atomizing air heater 420 can heat the atomizing air by energizing the heating wire to generate heat.

[0047] The embodiment of the utility model further comprises a first fluidizing fan 310, a fluidizing air heater 320 and a second fluidizing fan. The first fluidizing fan 310 is connected to the granulation chamber 111. The fluidizing air heater 320 is used to heat the fluidizing air flowing out of the first fluidizing fan 310. The second fluidizing fan is connected to the cooling bin 120 to pass the fluidizing air into the cooling bin 120.

[0048] The first fluidizing fan 310 and the second fluidizing fan are fluidizing fans of the prior art. The fluidizing fan is a device for generating fluidizing airflow, and is commonly used in processes such as fluidized bed, spray drying, and granulation. A large amount of gas is sucked in through the rotating impeller and discharged at high speed to form a strong airflow. By arranging a fluidizing air heater 320 below the granulation chamber 111, the fluidizing air is heated and then the heated fluidizing air is sent into the granulation chamber 111, so as to achieve the process control requirements of the fluidizing air temperature.

[0049] The embodiment of the utility model also includes a cooling unit, which is connected to the inlet and outlet of the heat exchange tube. The cooling unit is a cooling unit in the prior art, generally including a compressor, an evaporator, a condenser, a cooling circuit and a cooling water pump, a refrigerant is passed into the condenser, a cooling medium is passed into the cooling circuit, and generally, the cooling medium is cooling water, and the refrigerant in the condenser exchanges heat with the cooling water in the cooling circuit; the cooling circuit is connected to the inlet and outlet of the heat exchange tube to pass low-temperature cooling water into the heat exchange tube.

[0050] The utility model embodiment also includes a bucket elevator 510, a safety screen 520 and a product cooler 530, the safety screen 520 is connected to the cooling bin 120, the safety screen 520 is connected to the bucket elevator 510, the safety screen 520 is connected to the particle outlet, and the bucket elevator 510 is connected to the inlet of the granulation bin 110. The safety screen 520 is a sieve device that can filter out mixed substances to ensure product quality and production safety. The safety screen 520 is usually composed of a sieve machine itself, a vibration motor, a screen mesh and other parts. When in use, it is necessary to pass the calcium ammonium nitrate particles that need to be screened into the inside of the sieve machine, and turn on the vibration motor to make the sieve machine vibrate. Through the screening effect of the screen mesh, qualified products in the calcium ammonium nitrate particles flow out from the sieve holes and pass into the product cooler 530, and unqualified products flow into the granulation bin 110 through the bucket elevator 510 as crystal seeds to continue granulation.

[0051] Bucket elevator 510 is a commonly used vertical conveying equipment in the prior art, which is used to lift granular or powdered materials from a low place to a high place, and is usually composed of several chain or belt transmission devices with bucket-shaped containers. Product cooler 530 is a commonly used equipment in industrial production in the prior art, which is used to cool granular materials. It is generally composed of an inlet, an outlet, a cooling room, a transmission system, a fan and a bottom discharge system. During use, the granular material enters the cooling room from the feed port and continuously rolls therein, and is cooled by the air from the fan in the process. As time goes by, the particles gradually cool down and are finally discharged from the outlet. The bottom discharge system can be used to control the flow rate of the granular material and make it more evenly distributed in the cooling room.

[0052] The embodiment of the utility model also includes a scrubber 610 and an induced draft fan 620, the scrubber 610 is connected to the bed, and the scrubber 610 is connected to the induced draft fan 620. The tail gas discharged from the fluidized bed granulator 100 and the product cooler 530 is sent to the scrubber 610 for treatment, and after reaching the emission standard, it is discharged into the atmosphere through the induced draft fan 620. The scrubber 610 is an environmental protection device in the prior art, which is used to treat harmful gases in the exhaust gas of industrial production or engines. It mainly converts harmful components in the exhaust gas into harmless substances and reduces the emission of harmful pollutants in the exhaust gas through processes such as absorption, filtration and chemical reaction of pollutants in the exhaust gas. The scrubber 610 is usually composed of an air intake pipe, a nozzle, a tower body and a bottom drainage system. During use, the exhaust gas enters the tower body from the air intake pipe and contacts with the detergent. The pollutants in the exhaust gas are adsorbed, purified and chemically reacted, and finally discharged through the outlet or recycled in other ways. The induced draft fan 620 is a device for guiding and circulating air by generating airflow, and is generally composed of a motor, an impeller, a housing, a control system, etc. The induced draft fan 620 mainly generates airflow by driving the impeller to rotate through the motor.

[0053] Taking the calcium ammonium nitrate melt with a mass concentration of 80% and a temperature of 135° C. as an example, the calcium ammonium nitrate melt is pressurized to 0.5 MPa, atomized by an atomizer, and sent to the granulation chamber 111 for granulation. A part of the air enters the granulation chamber 111 after passing through the second atomizing fan, and a large amount of air enters the granulation chamber 111 and the cooling bin 120 through the fluidizing fan. The temperature of the fluidizing air is controlled to be 90-120° C. The products at the outlet of the granulator 100 are sent to the safety screen 520 for separation, and the qualified products are sent to the product cooler 530 for further cooling and output as products. The unqualified particles are returned to the granulator 100 through the bucket elevator 510 as crystal seeds for continued granulation; the tail gas discharged from the fluidized bed granulator 100 and the product cooler 530 is sent to the scrubber 610 for treatment, and is discharged into the atmosphere after reaching the emission standard.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A fluidized bed granulation device, characterized in that: include: The granulator (100) comprises a bed, wherein the bed is divided into a cooling bin (120) and a granulation bin (110); the granulation bin (110) and the cooling bin (120) are both provided with a fluidizing air outlet (210), and the granulation bin (110) is provided with an atomization outlet (220); the granulation bin (110) and the cooling bin (120) are connected; a cooling channel is formed in the granulation bin (110) and / or the cooling bin (120), and at least one side of the cooling channel is a cooling plate (130); a heat exchange tube is provided on the cooling plate (130), and the heat exchange tube has an inlet and an outlet.

2. The fluidized bed granulation device according to claim 1, characterized in that: The cooling plates (130) include at least two, and the cooling channel is formed between the two cooling plates (130).

3. The fluidized bed granulation device according to claim 1, characterized in that: At least two cooling channels are provided.

4. The fluidized bed granulation device according to claim 1, characterized in that: The granulation bin (110) is divided into at least two granulation chambers (111), each granulation chamber (111) is provided with the atomization port (220), and a fluidizing plate is provided at the bottom of the granulation chamber (111).

5. The fluidized bed granulation device according to claim 1, characterized in that: The cooling bin (120) is divided into at least one cooling chamber, and a fluidizing plate is provided at the bottom of the cooling chamber.

6. The fluidized bed granulation device according to any one of claims 1 to 5, characterized in that: It also includes an atomizing fan (410) and an atomizer, wherein the atomizer includes a solution pipeline (240) and an atomizing air pipeline (230), wherein the solution pipeline (240) is arranged inside the atomizing air pipeline (230), and one end of the atomizing air pipeline (230) is connected to the air outlet of the atomizing fan (410), and the other end is connected to the atomizing port (220).

7. The fluidized bed granulation device according to claim 6, characterized in that: It also includes an atomizing air heater (420) and a solution feed pump (430), wherein the atomizing air heater (420) is connected to the atomizing air fan (410), and the solution feed pump (430) is arranged on the solution pipeline (240).

8. The fluidized bed granulation device according to any one of claims 1 to 5, characterized in that: When the cooling channel is provided in both the granulation bin (110) and the cooling bin (120), the cooling channel of the granulation bin (110) is connected to the cooling channel of the cooling bin (120), and a particle outlet is provided at the end of the cooling channel of the cooling bin (120).

9. The fluidized bed granulation device according to any one of claims 1 to 5, characterized in that: It also includes a bucket elevator (510), a safety screen (520) and a product cooler (530), wherein the safety screen (520) is connected to the cooling bin (120), the safety screen (520) is connected to the bucket elevator (510), and the bucket elevator (510) is connected to the inlet of the granulation bin (110).

10. The fluidized bed granulation device according to any one of claims 1 to 5, characterized in that: It also includes a scrubber (610) and an induced draft fan (620), wherein the scrubber (610) is connected to the top of the granulator (100), and the scrubber (610) is connected to the induced draft fan (620).

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