Moving bed waste heat recovery device and method with material layer leveling function

Abstract

The invention discloses a moving bed waste heat recovery device and method with a material layer flattening function. The device comprises a moving bed, and a granulator is arranged in the center of the moving bed; the vertical heat exchange surface is arranged around the moving bed; the rotary material flattening device and the buried pipe heat exchange surface are arranged on the moving bed, the rotary material flattening device is located below the vertical heat exchange surface, and the buried pipe heat exchange surface is located below the rotary material flattening device; the air inducing equipment is arranged on the rotary material flattening device, is close to two opposite sides of the bottom of the moving bed and is used for conveying cooling gas to the moving bed; the vibrating device is arranged at the bottom of the moving bed; the blanking rotary valve is arranged at the outlet of the moving bed, and the blanking rotary valve is connected with a spiral conveyer; wherein the high-temperature liquid melt is granulated into liquid drops through the granulator, the liquid drops fall into the material level of the moving bed after exchanging heat with the cooling gas, the material level of the moving bed is stricken by the rotary material flattening device, adhesion caused by accumulation is avoided, and waste heat recovery can be realized while closed discharging is realized by combining the blanking rotary valve and the spiral conveyor.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste heat recovery of high-temperature liquid slag, and in particular relates to a moving bed waste heat recovery device and method with a material layer leveling function. Background Art

[0002] Blast furnace slag is a high-temperature solid waste produced during the steel smelting process. It has huge potential for heat recovery. The traditional blast furnace slag treatment method mainly adopts the water quenching process. This method has many problems, such as high water consumption, production of polluting gases such as sulfur dioxide and hydrogen sulfide, and a large amount of waste heat. It does not meet the goal of energy conservation and emission reduction in the steel industry.

[0003] The slag dry granulation and waste heat recovery technology is an efficient and environmentally friendly treatment process. It can quickly crush and solidify liquid slag into tiny particles without the need for water resources. In the granulation process, the slag particles can be efficiently recovered by convection heat transfer. The centrifugal granulation method has shown great potential in this technical field. It has the advantages of low energy consumption, high granulation efficiency, simple and compact equipment structure, and the ability to accurately control particle size and particle morphology. It not only helps to recycle resources, but also significantly improves energy efficiency and promotes green industrial development.

[0004] However, in the current field of slag dry granulation and waste heat recovery, the moving bed device used has large waste heat recovery energy conversion losses during the cooling process. The slag particles will also appear hot and sticky due to insufficient cooling, resulting in slag accumulation and blockage, affecting the smooth discharge of the device and failing to achieve the ideal expectations. Summary of the invention

[0005] The object of the present invention is to provide a moving bed waste heat recovery device and method with a material layer leveling function, so as to solve the technical defects of the moving bed device in the prior art, that is, the waste heat recovery energy conversion loss is large during the cooling process, and the slag particles will also appear heat return and stick together due to insufficient cooling, resulting in slag particle accumulation and blockage, affecting the smooth discharge of the device and failing to achieve the ideal expected technical results.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, a moving bed waste heat recovery device with a material layer leveling function is provided, comprising: A moving bed with a granulator at the center; A vertical heat exchange surface is arranged around the moving bed; The rotary flat material feeder and the buried pipe heat exchange surface are arranged on the moving bed, and the rotary flat material feeder is located below the vertical heat exchange surface, and the buried pipe heat exchange surface is located below the rotary flat material feeder; The induced draft device is arranged on the rotary leveler, near the bottom of the moving bed on opposite sides, and is used to convey cooling gas to the moving bed; A vibration device is arranged at the bottom of the moving bed; A material-dropping rotary valve is arranged at the outlet of the moving bed, and a screw conveyor is connected to the material-dropping rotary valve; The high-temperature liquid melt is granulated into droplets by the granulator, and the droplets fall into the moving bed material level after heat exchange with the cooling gas, and the rotating leveler scrapes the moving bed material level.

[0007] Furthermore, a cooling medium is provided in the rotary flat material feeder, and the cooling medium is gas, water or heat transfer oil.

[0008] Furthermore, the moving bed has a particle settling section, and the vertical heat exchange surface located on the particle settling section is a suspended screen type heat exchange surface or a vertical tube bundle.

[0009] Furthermore, the buried heat exchange surface is equipped with air cannons, which are located on opposite sides of the moving bed and above the induced draft device.

[0010] Furthermore, the moving bed has a cooling wall surface, and the cooling wall surface is a bare tube type water-cooled wall, a pin type water-cooled wall or a fin tube type water-cooled wall.

[0011] Furthermore, the air induced device includes a plurality of air induced ducts arranged at intervals, and the air induced ducts are provided with wind caps.

[0012] Furthermore, the air induced device is an air induced pipe or an air induced plate.

[0013] Furthermore, the cooling gas is air or argon.

[0014] Furthermore, the vibration device is a vibration motor, an electromagnetic vibrator or a vibration hammer.

[0015] In a second aspect, a method for using a moving bed waste heat recovery device with a material layer leveling function is provided, the method being carried out using the device as described above, comprising: The high-temperature liquid melt is made to fall onto a granulator, and the high-temperature liquid melt is granulated into high-temperature liquid droplets by the centrifugal force generated by the rotation of the granulator; The high-temperature liquid droplets fly in the moving bed, exchange heat with the cooling gas, and simultaneously exchange heat with the cooling wall surface and the vertical heat exchange surface inside the moving bed by radiation and convection, thereby obtaining slag particles; The slag particles fall onto the buried pipe heat exchange surface below, and are scraped flat by a rotary leveler to level the material level of the moving bed. After concentrated heat exchange, they are discharged from the moving bed through the drop rotary valve and screw conveyor at the outlet.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This device fully considers the heat transfer process of slag from high-temperature liquid to low-temperature solid, so that high-temperature particles can be fully cooled. The rotary leveler can promptly scrape the accumulated bulk particles to improve the heat exchange efficiency. Combined with the blanking rotary valve and screw conveyor, it ensures that the moving bed system can achieve safe and stable discharge under closed conditions, while realizing the recovery of waste heat.

[0017] 2. By optimizing the selection and use of cooling media, the overall waste heat recovery efficiency of the moving bed waste heat recovery device can be further improved and energy consumption can be reduced.

[0018] 3. The combination of the particle settling section and the vertical heat exchange surface enables the moving bed waste heat recovery device to recover waste heat more efficiently and improve energy utilization efficiency.

[0019] 4. During the operation of the moving bed, materials may accumulate or form blockages around the buried pipe heat exchange surface, affecting the heat exchange efficiency. The setting of the air cannon can effectively prevent this from happening. When material blockage is detected, the air cannon will start quickly, and the high-speed airflow generated will impact the blocked area, allowing the material to resume flow and ensure the smooth progress of the heat exchange process.

[0020] 5. The setting of cooling wall helps to maintain the temperature inside the equipment stable and reduce the impact of thermal stress on the equipment, thereby improving the stability and reliability of the equipment; at the same time, different cooling wall forms have their own characteristics and can be selected and optimized according to actual needs and working conditions to meet different application requirements.

[0021] 6. The air ducts arranged at intervals can organize the airflow more effectively, making it evenly distributed in the moving bed, reducing dead corners and blind spots, thereby improving ventilation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of a moving bed waste heat recovery device with a material layer leveling function provided by the present invention; Figure 2 A flow chart of the method for using the moving bed waste heat recovery device with material layer leveling function provided by the present invention; Among them: 1. Granulator; 2. Vertical heat exchange surface; 3. Rotary flat material feeder; 4. Buried pipe heat exchange surface; 5. Induced draft equipment; 6. Vibration device; 7. Blanking rotary valve; 8. Screw conveyor; 9. Air cannon; 10. Cooling wall. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] Blast furnace slag is a high-temperature solid waste produced during the steel smelting process. It has huge potential for heat recovery. The traditional blast furnace slag treatment method mainly adopts the water quenching process. This method has many problems, such as high water consumption, production of polluting gases such as sulfur dioxide and hydrogen sulfide, and a large amount of waste heat. It does not meet the goal of energy conservation and emission reduction in the steel industry.

[0030] The slag dry granulation and waste heat recovery technology is an efficient and environmentally friendly treatment process. It can quickly crush and solidify liquid slag into tiny particles without the need for water resources. In the granulation process, the slag particles can be efficiently recovered by convection heat transfer. The centrifugal granulation method has shown great potential in this technical field. It has the advantages of low energy consumption, high granulation efficiency, simple and compact equipment structure, and the ability to accurately control particle size and particle morphology. It not only helps to recycle resources, but also significantly improves energy efficiency and promotes green industrial development.

[0031] However, in the current field of slag dry granulation and waste heat recovery, the moving bed device used has large waste heat recovery energy conversion losses during the cooling process. The slag particles will also appear hot and sticky due to insufficient cooling, resulting in slag accumulation and blockage, affecting the smooth discharge of the device and failing to achieve the ideal expectations.

[0032] In order to solve the above technical defects, the inventor provides a moving bed waste heat recovery device and method with a material layer leveling function.

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings: like Figure 1As shown, in an embodiment of the present invention, a first aspect provides a moving bed waste heat recovery device with a material layer leveling function, comprising: a moving bed, at the center of which a granulator 1 is provided; a vertical heat exchange surface 2, which is arranged around the moving bed; a rotary leveler 3 and a buried pipe heat exchange surface 4, which are arranged on the moving bed, and the rotary leveler 3 is located below the vertical heat exchange surface 2, and the buried pipe heat exchange surface 4 is located below the rotary leveler 3; an induced draft device 5, which is arranged on the rotary leveler 3, close to the opposite sides of the bottom of the moving bed, for conveying cooling gas to the moving bed; a vibration device 6, which is arranged at the bottom of the moving bed; a blanking rotary valve 7, which is arranged at the outlet of the moving bed, and a screw conveyor 8 is connected to the blanking rotary valve 7; wherein, the high-temperature liquid melt is granulated into droplets by the granulator 1, and the droplets fall into the material level of the moving bed after heat exchange with the cooling gas, and the material level of the moving bed is scraped flat by the rotary leveler 3. In the above structure, the vertical heat exchange surface 2 is arranged around the moving bed, which increases the heat exchange area, so that the droplets of the high-temperature liquid melt after granulation can more fully exchange heat with the cooling gas, thereby improving the overall heat exchange efficiency; secondly, the addition of the buried pipe heat exchange surface 4 helps to recover the waste heat more efficiently and improve the energy utilization rate. The rotary leveler 3 is located below the vertical heat exchange surface 2. After the droplets fall into the moving bed material level, it can scrape the material level through rotation to ensure the uniform distribution of the material layer, which is not only conducive to the uniform transfer of heat, but also avoids the phenomenon of local overheating or overcooling of the material layer, and improves the stability and efficiency of waste heat recovery; in addition, the setting of the induced draft device 5 enables the cooling gas to be transported to the bottom of the moving bed in a targeted manner, and directly exchange heat with the high-temperature droplets, effectively reducing the temperature of the droplets and enhancing the cooling effect. Furthermore, the setting of the vibration device 6 helps to prevent the material from accumulating or agglomerating at the bottom of the moving bed, maintains the fluidity of the material layer, and thus improves the operating stability of the equipment. Finally, the coordinated use of the blanking rotary valve 7 and the screw conveyor 8 realizes the continuous and stable transportation of materials, further improving the reliability and automation level of the equipment. Figure 1 As shown, a cooling medium is provided in the rotary flat material device 3, and the cooling medium is gas, water or heat transfer oil. By selecting different types of cooling media, the overall waste heat recovery efficiency of the device can be further improved and energy consumption can be reduced. In this embodiment, the moving bed has a particle settling section, and the vertical heat exchange surface 2 located on the particle settling section is a suspended screen heat exchange surface or a vertical tube bundle. The particle settling section is provided to facilitate the orderly flow and sedimentation of particles in the moving bed, reduce the back mixing and short circuit phenomenon of particles, thereby increasing the contact time and heat exchange efficiency between particles and the vertical heat exchange surface 2; at the same time, the settling section can also enable particles to form a more stable particle layer during the heat exchange process, which is conducive to the effective transfer of heat; secondly, in one embodiment, the vertical heat exchange surface 2 is a suspended screen heat exchange surface; in another embodiment, the vertical heat exchange surface 2 is a vertical tube bundle, whether it is a suspended screen heat exchange surface or a vertical tube bundle, it can provide a larger heat exchange area, which is conducive to the rapid transfer of heat.

[0034] like Figure 1 As shown, the buried heat exchange surface 4 is equipped with air cannons 9, which are located on opposite sides of the moving bed and above the induced draft device 5. Specifically, during the operation of the moving bed, materials may accumulate or form blockages around the buried heat exchange surface 4, affecting the heat exchange efficiency. The setting of the air cannon 9 can effectively prevent this from happening. When material blockage is detected, the air cannon 9 is quickly started, and the high-speed airflow generated impacts the blocked area, so that the material resumes flowing, ensuring the smooth progress of the heat exchange process; and the air cannon 9 helps to keep the buried heat exchange surface 4 clean and unobstructed, thereby improving the heat exchange efficiency.

[0035] In this embodiment, the moving bed has a cooling wall surface 10, and the cooling wall surface 10 is a bare tube type water-cooled wall, a pin type water-cooled wall or a fin tube type water-cooled wall.

[0036] like Figure 1 As shown, the induced air device 5 includes a plurality of induced air ducts arranged at intervals, and hoods are provided on the induced air ducts. Specifically, the induced air device 5 is an induced air duct or an induced air plate.

[0037] In this embodiment, the cooling gas is air or argon.

[0038] In this embodiment, the vibration device 6 is a vibration motor, an electromagnetic vibrator or a vibration hammer.

[0039] In specific applications, the inner wall and the top of the device are provided with cooling wall surfaces 10, a granulator 1 is provided at the center above the device, a vertical heat exchange surface 2 is provided below the granulator 1, i.e., the particle settling section of the moving bed, and a buried pipe heat exchange surface 4 is provided at the suspension section below the particle settling section, with air cannons 9 on both sides, a rotary leveler 3 is provided above the buried pipe heat exchange surface 4, an induced draft device 5 is provided at the bottom of the moving bed, a vibration device 6 is provided near the outlet of the moving bed, and the outlet is connected to a blanking rotary valve 7 and a screw conveyor 8. The vertical heat exchange surface 2 can radiate heat exchange and collide with the slag particles when they fall to generate a small amount of heat conduction. The vertical heat exchange surface 2 is a screen heat exchanger or a vertical tube bundle, and the tube type is a light tube, a fin tube or a nail head tube, and the heat exchange medium therein is generally gas, water or an organic medium. The buried heat exchange surface 4 is placed horizontally, and the arrangement is regular triangle, square straight row, square staggered row or concentric circle arrangement. The cooling medium is generally gas, water or organic medium. The tube type generally adopts light tube, fin tube, nail head tube, etc. The slag particles fall on the buried tube to produce a strong heat exchange effect. The air cannons 9 on both sides blow the buried heat exchange surface 4 to avoid bridging and bonding. The rotary leveler 3 is set above the buried heat exchange surface 4 to scrape the material level on the buried heat exchange surface 4 to avoid material level accumulation and strengthen heat exchange. The internal cooling medium includes but is not limited to gas, water and heat transfer oil for cooling.

[0040] The cooling wall surface 10 adopts a light tube water-cooled wall, a pin-type water-cooled wall or a fin tube water-cooled wall, and gas, water or organic medium is passed into the tube; in the case of natural circulation or forced circulation, the heat exchange medium entering the cooling wall surface 10 is first collected in the inlet header, then distributed to the cooling wall tube, and finally collected in the outlet header. At the bottom of the moving bed, an induced draft device 5 is set. The induced draft device 5 is generally an induced draft pipe or an induced draft plate. The cooling gas blown in from the bottom conducts convective heat exchange with the slag particles falling to the bottom to further recover the waste heat. The introduced cooling gas includes but is not limited to protective gases such as air or argon. The blanking rotary valve 7 and the screw conveyor 8 at the outlet of the moving bed serve as the discharge device of the moving bed, which can avoid discharge blockage and ensure smooth discharge. The selection of the discharge device includes but is not limited to the use of a water-cooled spiral slag cooler and a drum slag cooler. The structure of the slag cooler includes but is not limited to the use of a water-cooled jacket, internal ventilation and internal baffles.

[0041] In a second aspect, a method for using a moving bed waste heat recovery device with a material layer leveling function is provided, wherein the method is performed using the device as described above, such as Figure 2 As shown, including: S101, making the high-temperature liquid melt fall onto the granulator, and relying on the centrifugal force generated by the rotation of the granulator, the high-temperature liquid melt is granulated into high-temperature droplets; illustratively, high-temperature slag falls into the device from the slag drop port on the top of the device, and after centrifugal granulation by the granulator 1, high-temperature droplets are obtained, and fly out from the edge of the granulator 1 to all sides.

[0042] S102, the high-temperature liquid droplets fly in the moving bed, exchange heat with the cooling gas, and simultaneously exchange heat by radiation and convection with the cooling wall surface and the vertical heat exchange surface inside the moving bed to obtain slag particles; illustratively, during the high-temperature liquid droplets flying and falling on the moving bed, they first transfer heat with the cooling wall surface 10, and mainly by radiation heat exchange, and the slag gradually cools; when the slag continues to fall, it falls into the particle settling section of the moving bed, exchanges heat by radiation with the vertical heat exchange surface 2, and the slag collides with the vertical heat exchange surface 2, which also generates a small amount of heat conduction, and the slag particles are further cooled, the temperature is reduced, and gradually turns into a solid state.

[0043] S103, the slag particles fall onto the buried heat exchange surface below, and the material level of the moving bed is scraped flat by the rotary leveler. After concentrated heat exchange, the slag particles are discharged from the moving bed through the blanking rotary valve and screw conveyor at the outlet. For example, when the slag falls onto the buried heat exchange surface 4 of the moving bed, the falling speed of the slag particles slows down, and the slag particles are fully in contact with the cooling buried pipe for heat conduction. The rotary leveler 3 can scrape the material level on the buried heat exchange surface 4, evenly distribute the material level, avoid material level accumulation, and fully contact the cooling buried pipe for heat conduction. Secondly, the air cannon 9 and the induced draft device 5 below can not only blow the buried heat exchange surface 4 to avoid bridging and bonding, but also further exchange heat with the slag particles to enhance waste heat recovery; the cooled slag particles fall into the outlet of the moving bed, and the vibration device 6 prevents the slag particles from clogging at the outlet. After the slag particles pass through the blanking rotary valve 7 and the screw conveyor 8, they leave the moving bed safely and stably to complete the closed discharge.

[0044] To sum up, in the application process of the method provided by the present invention, the cooling wall surface 10, the vertical heat exchange surface 2, the buried pipe heat exchange surface 4 and the rotary leveler 3 in the recovery device cooperate with each other to cool the slag, and the convective heat exchange is enhanced by the induced draft equipment 5 to improve the overall waste heat recovery efficiency of the device. Finally, the material level is scraped flat by the rotary leveler 3 to avoid sedimentation and accumulation. Combined with the blanking rotary valve 7 and the screw conveyor 8, smooth closed discharge is guaranteed.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

Claims

1. A moving bed waste heat recovery device with material layer leveling function, characterized in that: include: A moving bed having a granulator (1) at the center thereof; A vertical heat exchange surface (2) is arranged around the moving bed; The rotary flattener (3) and the buried pipe heat exchange surface (4) are arranged on the moving bed, and the rotary flattener (3) is located below the vertical heat exchange surface (2), and the buried pipe heat exchange surface (4) is located below the rotary flattener (3); An air induced device (5) is arranged on the rotating flat material device (3) at two opposite sides close to the bottom of the moving bed, and is used to convey cooling gas to the moving bed; A vibration device (6) is arranged at the bottom of the moving bed; A material-dropping rotary valve (7) is arranged at the outlet of the moving bed, and a screw conveyor (8) is connected to the material-dropping rotary valve (7); The high-temperature liquid melt is granulated into liquid droplets by the granulator (1), and the liquid droplets fall into the material level of the moving bed after heat exchange with the cooling gas, and the material level of the moving bed is scraped flat by the rotary leveler (3).

2. The moving bed waste heat recovery device with material layer leveling function according to claim 1 is characterized in that: A cooling medium is provided in the rotary flat material device (3), and the cooling medium is gas, water or heat transfer oil.

3. The moving bed waste heat recovery device with material layer leveling function according to claim 1 is characterized in that: The moving bed has a particle settling section, and the vertical heat exchange surface (2) located on the particle settling section is a suspended screen type heat exchange surface or a vertical tube bundle.

4. The moving bed waste heat recovery device with material layer leveling function according to claim 1 is characterized in that: The buried heat exchange surface (4) is equipped with air cannons (9), and the air cannons (9) are located on two opposite sides of the moving bed and above the induced draft device (5).

5. The moving bed waste heat recovery device with material layer leveling function according to claim 1 is characterized in that: The moving bed has a cooling wall surface (10), and the cooling wall surface (10) is a light tube type water cooling wall, a pin type water cooling wall or a fin tube type water cooling wall.

6. The moving bed waste heat recovery device with material layer leveling function according to claim 1 is characterized in that: The air induction device (5) comprises a plurality of air induction pipes arranged at intervals, and air caps are provided on the air induction pipes.

7. The moving bed waste heat recovery device with material layer leveling function according to claim 6 is characterized in that: The air induction device (5) is an air induction pipe or an air induction plate.

8. The moving bed waste heat recovery device with material layer leveling function according to claim 1 is characterized in that: The cooling gas is air or argon.

9. The moving bed waste heat recovery device with material layer leveling function according to claim 1 is characterized in that: The vibration device (6) is a vibration motor, an electromagnetic vibrator or a vibration hammer.

10. A method for using a moving bed waste heat recovery device with a material layer leveling function, characterized in that: The method is carried out using the device according to any one of claims 1 to 9, comprising: The high-temperature liquid melt is made to fall onto a granulator, and the high-temperature liquid melt is granulated into high-temperature liquid droplets by the centrifugal force generated by the rotation of the granulator; The high-temperature liquid droplets fly in the moving bed, exchange heat with the cooling gas, and simultaneously exchange heat with the cooling wall surface and the vertical heat exchange surface inside the moving bed by radiation and convection, thereby obtaining slag particles; The slag particles fall onto the buried pipe heat exchange surface below, and are scraped flat by a rotary leveler to level the material level of the moving bed. After concentrated heat exchange, they are discharged from the moving bed through the drop rotary valve and screw conveyor at the outlet.

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