Centrifugal granulation and waste heat recovery device with slag-bonding prevention function and use method of centrifugal granulation and waste heat recovery device

Abstract

The centrifugal granulation and waste heat recovery device comprises a granulation bin, a heat flow guide pipe is arranged at the top of the granulation bin, one end of the heat flow guide pipe extends into the granulation bin, and a granulator, an airflow device, a heat exchange flat plate, a soot blower and a radiation heat exchange surface are arranged in the granulation bin; a material flattening device is arranged at the bottom of the pelletizer in the pelletizing bin; a moving bed is arranged below the granulation bin, and a blockage clearing device is arranged on the outer wall of the moving bed and close to the bottom of the moving bed; a heat exchange tube bundle is arranged below the material flattening device; a ventilation plate is arranged below the heat exchange tube bundle in the moving bed, and an air cap is arranged on the ventilation plate; a discharging opening is formed in the bottom of the moving bed, and a discharging assembly is arranged on the discharging opening. The problem of high-temperature slag bonding can be solved by strengthening radiation heat exchange, convection heat exchange and solid-solid heat exchange in the particle flying falling and deposition process, the heat exchange efficiency is remarkably improved, stable operation of equipment is ensured, and remarkable economic and technical advantages are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of resource utilization of high-temperature liquid slag, and in particular to a centrifugal granulation and waste heat recovery device with anti-slagging function and a use method thereof. Background Art

[0002] The steel industry is an industry with high energy consumption and high emissions, and its energy consumption accounts for nearly 30% of the total industrial energy consumption. Liquid slag, as a by-product of the steel production process, includes blast furnace slag, converter slag, electric furnace slag, etc., usually with a temperature above 1200°C, contains a large amount of sensible heat, and has huge potential for heat recovery. The wet process is currently the most common method for treating liquid slag, but a large amount of harmful gases such as SO2 and H2S will be released during the process, seriously polluting the environment; secondly, the process is insufficient in heat recovery, and a large amount of high-quality heat is lost during the water quenching process. Its utilization rate is even less than 10%, which can no longer meet the urgent needs of energy conservation and emission reduction in the current steel industry.

[0003] Compared with the wet process, the dry treatment process does not consume water, does not emit harmful gases, and can achieve high-grade waste heat recovery that takes into account the glass content of the liquid slag. It has significant advantages. Among them, the centrifugal granulation and waste heat recovery process has received widespread attention due to its small particle size of slag particles, high glass content and sphericity, high waste heat recovery efficiency, and simple and easy equipment operation.

[0004] However, in the actual production process, the high-temperature liquid slag poses a great challenge to the application of waste heat recovery technology due to its high temperature, complex composition and easy solidification and bonding. Especially in the process of centrifugal granulation and flight cooling, the slag particles are easy to adhere to the wall of the device to form slagging. The slagging phenomenon not only affects the operating stability and service life of the device, but also affects the granulation effect, resulting in uneven cooling of the particles, thereby reducing the quality of the granulated slag, which has an adverse effect on its subsequent resource recycling. Summary of the invention

[0005] In order to solve the problems of high temperature liquid slag, complex composition and easy solidification and bonding in the waste heat recovery process, the present invention provides a centrifugal granulation and waste heat recovery device with anti-slagging and a use method to improve the efficiency and stability of granulation and waste heat recovery, and meet the urgent needs of the steel industry in energy conservation, emission reduction and resource utilization.

[0006] To achieve the above object, the present invention provides the following technical solutions: The present invention proposes a centrifugal granulation and waste heat recovery device with anti-slagging, comprising a granulation bin, a heat conduction pipe is arranged on the top of the granulation bin, one end of the heat conduction pipe extends into the granulation bin, and a granulator is arranged in the granulation bin at a position corresponding to the inner end of the heat conduction pipe; The inner wall of the granulating bin is provided with a first radiation heat exchange surface; An air flow device is arranged on the inner wall of the granulating bin; A heat exchange plate is arranged in the granulation bin, and a soot blower is arranged on the top of the heat exchange plate in the granulation bin; A leveler is provided in the granulation bin at the bottom of the granulator; A moving bed is arranged below the granulation bin; The inner wall of the moving bed is provided with a second radiation heat exchange surface; A heat exchange tube bundle is arranged in the moving bed below the flattening device; The moving bed is provided with a blockage clearer; A ventilation plate is provided in the moving bed below the heat exchange tube bundle, and a hood is provided on the ventilation plate; A discharge port is arranged at the bottom of the moving bed, and a discharge assembly is arranged on the discharge port.

[0007] Preferably, the granulator is a pointed top rotator or a sandwich rotating multi-pointed disk granulator.

[0008] Preferably, the airflow device is provided with a plurality of spray outlets with different spray directions.

[0009] Preferably, a far-infrared coating is provided on the outer walls of the heat exchange flat plate, the first radiation heat exchange surface and the second radiation heat exchange surface.

[0010] Preferably, a first cooling channel is provided in the radiation heat exchange surface, and the first cooling channel is filled with a first cooling medium; A second cooling channel is arranged in the heat exchange plate, and the second cooling channel is filled with a second cooling medium.

[0011] Preferably, the surface of the heat exchange tube bundle is provided with one of a silicon carbide coating and an aluminum oxide coating; a third cooling channel is provided in the heat exchange tube bundle, and the third cooling channel is filled with a third cooling medium.

[0012] Preferably, the soot blower is one or both of a sonic soot blower and a telescopic soot blower.

[0013] Preferably, the discharge assembly comprises a rotary sealing valve, the rotary sealing valve is installed on the discharge port, a screw conveyor is arranged below the rotary sealing valve, a fourth cooling channel is arranged on the screw conveyor, and the fourth cooling channel is filled with a fourth cooling medium.

[0014] Preferably, a fifth cooling channel is provided in the flat material container; The blockage clearer is one or both of an air cannon and a silo wall vibrator.

[0015] The present invention proposes a method for using a centrifugal granulation and waste heat recovery device with anti-slagging, which is applied to the above-mentioned centrifugal granulation and waste heat recovery device with anti-slagging, and comprises the following steps: The high-temperature liquid slag is introduced into the granulation bin through the heat conduction mechanism; The high-temperature liquid slag is centrifugally granulated in a granulator to obtain high-temperature slag particles; The high-temperature slag particles fly in the granulation bin, and the radiation heat exchange is enhanced through the first radiation heat exchange surface. The flight heat exchange of the high-temperature slag particles is enhanced through the air flow device and the wall collision point is regulated. The air flow device forms an air film on the first radiation heat exchange surface to prevent the high-temperature slag particles from slagging. During the falling process of the high-temperature slag particles, the heat exchange during the falling process of the particles is enhanced by the heat exchange plate; the high-temperature slag particles adhering to the heat exchange plate and the first radiation heat exchange surface are purged by the soot blower to prevent the high-temperature slag particles from being deposited; The slag particles fall onto the leveler, and then the particle layer is leveled by the leveler to prevent the slag particles from piling up; Subsequently, the slag particles pass through the heat exchange tube bundle and the second radiation heat exchange surface in the moving bed to enhance the heat exchange of the slag particles and prevent the slag particles from thermally bonding; the slag particles fall onto the ventilation plate, and the high-temperature slag particles are further cooled by cooling air. After cooling, the obtained slag particles are discharged from the moving bed through the discharge assembly; wherein, the declogging device cleans the slag particles accumulated in the moving bed to promote discharge.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention proposes a centrifugal granulation and waste heat recovery device with anti-slagging function. By coating the radiation heat exchange surface and the heat exchange plate with a far-infrared coating, the heat exchange efficiency of the particles in the flight and falling process is significantly enhanced, the cooling rate of the high-temperature slag particles is increased, and the slagging phenomenon is effectively prevented. The heat exchange performance is enhanced by combining the heat exchange tube bundle; the air flow fan in the granulation bin forms an air film on the radiation heat exchange surface, which effectively prevents the high-temperature slag particles from directly contacting the radiation heat exchange surface, and significantly reduces the slagging incidence rate; the soot blower and the blockage remover ensure the cleanliness of the heat exchange plate and the radiation heat exchange surface and the long-term efficient operation. The present invention can solve the problem of high-temperature slag slagging by strengthening the radiation heat exchange and convection heat exchange and solid-solid heat exchange in the particle flight, falling and deposition process, significantly improves the heat exchange efficiency, ensures the stable operation of the equipment, and has significant economic and technical advantages.

[0017] Furthermore, the discharge assembly of the system adopts a screw conveyor combined with the fourth cooling channel to further reduce the temperature of the slag particles while transporting them, thereby improving the overall utilization efficiency of the waste heat recovery device.

[0018] Furthermore, the surface of the heat exchange tube bundle of the system adopts high temperature resistant and wear-resistant material, which increases the high temperature resistance and wear resistance of the heat exchange tube bundle, reduces particle adhesion, and effectively prevents the formation of slag.

[0019] Furthermore, the material leveler in the system has a fifth cooling channel, which can effectively avoid local overheating of the particle layer while leveling the material layer, thereby preventing the occurrence of slagging. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a centrifugal granulation and waste heat recovery device with anti-slagging function proposed by the present invention; In the attached figure: 1. heat conduction pipe; 2. granulation bin; 3. air flow device; 4. radiation heat exchange surface; 5. heat exchange plate; 6. leveler; 7. heat exchange tube bundle; 8. blockage remover; 9. ventilation plate; 10. rotary sealing valve; 11. screw conveyor; 12. soot blower; 13. air hood; 14. granulator; 15. moving bed. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "one side", "one end", "one side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention 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 present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0025] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0026] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0027] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0028] Hereinafter, the anti-slagging method and the overall arrangement of the centrifugal granulation and waste heat recovery device of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0029] like Figure 1As shown, the present invention proposes a centrifugal granulation and waste heat recovery device with anti-slagging, including a granulation bin 2, a heat conduction pipe 1 is arranged on the top of the granulation bin 2, one end of the heat conduction pipe 1 extends into the granulation bin 2, and high-temperature liquid slag is introduced into the granulation bin 2 through the heat conduction pipe 1, and a granulator 14 is arranged at a position corresponding to the inner end of the heat conduction pipe 1 in the granulation bin 2, and the granulator 14 is located at the center of the granulation bin 2. The granulator 14 is used for granulating the high-temperature liquid slag introduced into the granulation bin 2 by centrifugal force to form high-temperature slag particles; illustratively, the granulator 14 is one of a pointed top rotator or a sandwich rotating multi-pointed disk rotator.

[0030] like Figure 1 As shown, a first radiation heat exchange surface 4 is provided on the inner wall of the granulating bin 2 to enhance the radiation heat exchange efficiency during the flight of the high-temperature slag particles; a first cooling channel is provided in the first radiation heat exchange surface 4, and the first cooling channel is filled with a first cooling medium. Exemplarily, the first cooling medium includes but is not limited to water, air, thermal oil, etc., to enhance heat exchange; a far-infrared coating layer is provided on the first radiation heat exchange surface 4, and the radiation heat exchange performance is further enhanced by the far-infrared coating layer.

[0031] like Figure 1 As shown, an airflow device 3 is provided above the inner wall of the granulating bin 2. The airflow device 3 is circumferentially arranged on the radiation heat exchange surface 4. A plurality of spray nozzles with adjustable airflow directions are provided on the airflow device 3. The plurality of spray nozzles are adapted to the airflow requirements under different working conditions, optimize the formation of the air film and the heat exchange effect, and effectively prevent the high-temperature slag particles from slagging on the first radiation heat exchange surface 4.

[0032] like Figure 1 As shown, in the granulation bin 2, a heat exchange plate 5 is arranged around the granulator 14, and the heat exchange plate 5 is located in the falling path of the high-temperature slag particles. By way of example, the heat exchange plate 5 includes but is not limited to corrugations, threads, ribs and the like. The heat exchange area is increased by a plurality of heat exchange plates 5, and the heat exchange efficiency is improved to ensure that the particles are fully cooled during the falling process; a second cooling channel is arranged on the heat exchange plate 5, and the second cooling channel is filled with a second cooling medium. By way of example, the second cooling medium includes but is not limited to water, air, heat transfer oil and the like to enhance heat exchange; a far-infrared coating layer is arranged on the heat exchange plate 5, and the radiation heat exchange performance is further enhanced by the far-infrared coating layer.

[0033] like Figure 1 As shown, a soot blower 12 is provided at the top of the heat exchange plate 5 in the granulation bin 2, and the air outlet of the soot blower 12 is located at the inlet relative to the top of the heat exchange plate 5. The soot blower 12 flexibly adjusts the blowing force and range according to the slagging situation, and regularly cleans the heat exchange plate 5 to ensure its continuous cleaning to prevent high-temperature slag particles from being deposited on the heat exchange plate 5. Exemplarily, the soot blower 12 is one or both of a sonic soot blower and a telescopic soot blower.

[0034] like Figure 1 As shown, a leveler 6 is provided at the bottom of the granulator 14 in the granulating bin 2, and the leveler 6 is used to ensure the flatness of the high-temperature slag particle layer; a fifth cooling channel is provided inside the leveler 6, and the fifth cooling channel is filled with a fifth cooling medium. The cooling medium is water, air or heat transfer oil, etc., which can effectively avoid local overheating of the particle layer, thereby preventing the occurrence of slagging.

[0035] like Figure 1 As shown, a moving bed 15 is provided at the bottom of the granulation bin 2, and a clearing device 8 is provided on the outer wall of the moving bed 15 in the particle deposition area, which can be triggered regularly or automatically to prevent the accumulation of high-temperature slag particles in the granulation bin 2, maintain the flatness and smoothness of the material layer, and ensure the continuous operation of the equipment; in this embodiment, the clearing device 8 is one or both of an air cannon and a bin wall vibrator.

[0036] like Figure 1 As shown, a heat exchange tube bundle 7 is arranged below the leveler 6 in the moving bed 15, and a vibrator is arranged on the heat exchange tube bundle 7. The vibrator can dynamically enhance the contact between the high-temperature slag particles and the tube wall to prevent the high-temperature slag particles from depositing and slagging. The heat exchange tube bundle 7 is filled with a third cooling medium. In this embodiment, the third cooling medium includes but is not limited to water, air, thermal oil, etc.; the heat exchange tube bundle 7 strengthens the turbulence effect and improves the convective heat transfer efficiency through the flow of the third cooling medium; a high-temperature and wear-resistant material layer is arranged on the surface of the heat exchange tube bundle 7, and the high-temperature and wear-resistant material includes but is not limited to silicon carbide coating or aluminum oxide coating to enhance wear resistance and corrosion resistance, while reducing particle adhesion and effectively preventing the formation of slagging; the tube type of the heat exchange tube bundle 7 includes but is not limited to spiral tubes, fin tubes, H-type fin tubes, etc.

[0037] like Figure 1 As shown, the inner wall of the moving bed 15 is provided with a second radiation heat exchange surface 16, and the second radiation heat exchange surface 16 is used to enhance the radiation heat exchange efficiency during the flight of high-temperature slag particles; a sixth cooling channel is provided in the second radiation heat exchange surface 16, and the sixth cooling channel is filled with a sixth cooling medium. Exemplarily, the sixth cooling medium includes but is not limited to water, air, thermal oil, etc., to enhance heat exchange; a far-infrared coating layer is provided on the second radiation heat exchange surface 16, and the radiation heat exchange performance is further enhanced by the far-infrared coating layer.

[0038] like Figure 1 As shown, a ventilation plate 9 is provided below the heat exchange tube bundle 7 in the moving bed 15, and a hood 13 is provided on the ventilation plate 9; cooling air is transported to the granulation bin 2 through the ventilation plate 9 to further reduce the temperature of the high-temperature slag particles and ensure stable cooling of the low-temperature slag particle aggregation area.

[0039] like Figure 1As shown, a discharge port is provided at the bottom of the moving bed 15, and a discharge assembly is provided on the discharge port. The discharge assembly includes a rotary sealing valve 10, and the rotary sealing valve 10 is installed on the discharge port. A screw conveyor 11 is provided below the rotary sealing valve 10, and a fourth cooling channel is provided on the screw conveyor 11. The fourth cooling channel is filled with a fourth cooling medium, and the fourth cooling medium is one of water, air and heat transfer oil. Through the fourth cooling channel and the fourth cooling medium, the temperature of the slag particles can be further reduced while the low-temperature molten slag particles are transported.

[0040] The present invention proposes a method for using a centrifugal granulation and waste heat recovery device with anti-slagging, which is implemented based on the above-mentioned centrifugal granulation and waste heat recovery device with anti-slagging, and includes the following steps: The high-temperature liquid slag is introduced into the granulation bin 2 through the heat conduction pipe 1; The high-temperature liquid slag is centrifugally granulated in the granulator 14 to obtain high-temperature slag particles; The high-temperature slag particles fly in the granulation bin 2. During the flight, the high-temperature slag particles exchange heat with the radiation heat exchange surface 4 provided with a far-infrared coating. The far-infrared coating significantly improves the radiation heat exchange efficiency, accelerates the cooling speed of the particles, and reduces the risk of slagging. During the radiation heat exchange process, the fifth cooling medium is sprayed through multiple spray ports by the air flow device 3 to form an air film on the radiation heat exchange surface 4 to prevent the high-temperature slag particles from slagging, strengthen the flight heat exchange of the high-temperature slag particles, and regulate the wall collision point; During the falling process, the high-temperature slag particles pass through the heat exchange plate 5 provided with a far-infrared coating, and are further cooled by radiation and solid-solid heat exchange, thereby enhancing the heat exchange during the falling process of the high-temperature slag particles; the soot blower 12 regularly cleans the heat exchange plate 5 and the radiation heat exchange surface 4 to keep them clean and prevent the deposition of high-temperature slag particles; During the falling process of the high-temperature slag particles, the leveler 6 ensures the flatness of the slag particle layer by evenly distributing the particles, thereby facilitating the even cooling of the particles and preventing accumulation and slagging. At the same time, the fifth cooling channel on the leveler 6 further cools the slag particles through the fifth cooling medium, ensuring that the slag particles are at a suitable temperature during the even distribution process and preventing local overheating from causing slagging. The slag particles evenly distributed by the leveler 6 are further enhanced in heat exchange by the radiation heat exchange surface 4 of the inner wall of the moving bed, the heat exchange tube bundle 7 and the cooling air delivered by the ventilation plate 9, thereby reducing the temperature of the high-temperature slag particles and preventing the high-temperature slag particles from being thermally bonded. The ventilation plate 9 blows cooling air through the wind hood 13 to further reduce the temperature of the high-temperature slag particles. At the same time, the declogging device 8 creates vibration on the outer wall of the moving bed 15 to clean up the slag particles accumulated in the moving bed 15 and promote discharge. Finally, the cooled slag particles on the ventilation plate 9 are continuously discharged from the moving bed 15 through the rotary sealing valve 10 and the screw conveyor 11. In the process of transporting the low-temperature slag particles, the screw conveyor 11 cooperates with the fourth cooling channel and the fourth cooling medium to further cool the slag particles, thereby completing the entire centrifugal granulation and waste heat recovery anti-slagging process.

[0041] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0042] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A centrifugal granulation and waste heat recovery device with anti-slagging function, characterized in that: It comprises a granulation bin (2), a heat conduction pipe (1) is arranged on the top of the granulation bin (2), one end of the heat conduction pipe (1) extends into the granulation bin (2), and a granulator (14) is arranged in the granulation bin (2) at a position corresponding to the inner end of the heat conduction pipe (1); A first radiation heat exchange surface (4) is provided on the inner wall of the granulation bin (2); An air flow device (3) is provided on the inner wall of the granulation bin (2); A heat exchange plate (5) is arranged in the granulation bin (2), and a soot blower (12) is arranged on the top of the heat exchange plate (5) in the granulation bin (2); A leveler (6) is provided at the bottom of the granulator (14) in the granulation bin (2); A moving bed (15) is arranged below the granulation bin (2); A second radiation heat exchange surface (16) is provided on the inner wall of the moving bed (15); A heat exchange tube bundle (7) is arranged in the moving bed (15) below the leveler (6); The moving bed (15) is provided with a blockage clearing device (8); A ventilation plate (9) is provided in the moving bed (15) below the heat exchange tube bundle (7), and a hood (13) is provided on the ventilation plate (9); The bottom of the moving bed (15) is provided with a discharge port, and a discharge component is provided on the discharge port.

2. The centrifugal granulation and waste heat recovery device with anti-slagging function according to claim 1, characterized in that: The granulator (14) is a pointed top rotator or a sandwich rotating multi-pointed disk granulator.

3. The centrifugal granulation and waste heat recovery device with anti-slagging function according to claim 1, characterized in that: The airflow device (3) is provided with a plurality of spray outlets with different spray directions.

4. The centrifugal granulation and waste heat recovery device with anti-slagging function according to claim 1, characterized in that: Far-infrared coatings are provided on the outer walls of the heat exchange plate (5), the first radiation heat exchange surface (4) and the second radiation heat exchange surface (16), wherein a sixth cooling channel is provided in the second radiation heat exchange surface (16), and the sixth cooling channel is filled with a sixth cooling medium.

5. The centrifugal granulation and waste heat recovery device with anti-slagging function according to claim 1, characterized in that: A first cooling channel is provided in the radiation heat exchange surface (4), and the first cooling channel is filled with a first cooling medium; A second cooling channel is provided in the heat exchange plate (5), and the second cooling channel is filled with a second cooling medium.

6. The centrifugal granulation and waste heat recovery device with anti-slagging function according to claim 1, characterized in that: The surface of the heat exchange tube bundle (7) is provided with one of a silicon carbide coating and an aluminum oxide coating; a third cooling channel is provided in the heat exchange tube bundle (7), and the third cooling channel is filled with a third cooling medium.

7. The centrifugal granulation and waste heat recovery device with anti-slagging function according to claim 1, characterized in that: The soot blower (12) is one or both of a sonic soot blower and a telescopic soot blower.

8. The centrifugal granulation and waste heat recovery device with anti-slagging function according to claim 1, characterized in that: The discharge assembly comprises a rotary sealing valve (10), the rotary sealing valve (10) being mounted on the discharge port, a screw conveyor (11) being arranged below the rotary sealing valve (10), a fourth cooling channel being arranged on the screw conveyor (11), and the fourth cooling channel being filled with a fourth cooling medium.

9. The centrifugal granulation and waste heat recovery device with anti-slagging function according to claim 1, characterized in that: A fifth cooling channel is provided in the flat material device (6); The blockage clearer (8) is one or both of an air cannon and a silo wall vibrator.

10. A method for using a centrifugal granulation and waste heat recovery device with anti-slagging function, applied to a centrifugal granulation and waste heat recovery device with anti-slagging function as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: The high-temperature liquid slag is introduced into the granulation bin (2) through the heat conduction mechanism (1); The high-temperature liquid slag is centrifugally granulated in a granulator (14) to obtain high-temperature slag particles; The high-temperature slag particles fly in the granulation bin (2), and the radiation heat exchange is enhanced through the first radiation heat exchange surface (4). The air flow device (3) is used to strengthen the flight heat exchange of the high-temperature slag particles and regulate the wall collision point. The air flow device (3) forms an air film on the first radiation heat exchange surface (4) to prevent the high-temperature slag particles from slagging. During the falling process of the high-temperature slag particles, the heat exchange during the falling process of the particles is enhanced by the heat exchange plate (5); the high-temperature slag particles adhering to the heat exchange plate (5) and the first radiation heat exchange surface (4) are purged by the soot blower (12) to prevent the high-temperature slag particles from being deposited; The slag particles fall onto the leveler (6), and then the particle layer is leveled by the leveler (6) to prevent the slag particles from piling up; The slag particles then pass through the heat exchange tube bundle (7) and the second radiation heat exchange surface (16) in the moving bed (15) to enhance the heat exchange of the slag particles and prevent the slag particles from being thermally bonded. The slag particles fall onto the ventilation plate (9) and are further cooled by cooling air. After cooling, the obtained slag particles are discharged from the moving bed (15) through a discharge assembly. The clearing device (8) cleans the slag particles accumulated in the moving bed (15) to promote discharge.

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