Centrifugal granulation waste heat recovery device

Abstract

The application provides a centrifugal granulation waste heat recovery device, and relates to the technical field of blast furnace slag waste heat recovery.The centrifugal granulation waste heat recovery device comprises a buffering mechanism, a flow guide pipe, a granulation mechanism and a heat preservation mechanism.The flow guide pipe is connected between the buffering mechanism and the granulation mechanism.The heat preservation mechanism is used for covering the flow guide pipe and preserving the temperature of the flow guide pipe.Compared with the prior art, the heat preservation mechanism can preserve the temperature of the flow guide pipe, reduce the heat loss of high-temperature molten material, reduce the adverse effect of the increase of the viscosity of the material due to the decrease of the temperature on the granulation effect, and avoid the risk of the blockage of the flow guide pipe due to the solidification of the material caused by the excessive decrease of the temperature.

Description

Technical Field

[0001] This invention relates to the field of blast furnace slag waste heat recovery technology, and more specifically, to a centrifugal granulation waste heat recovery device. Background Technology

[0002] The steel industry provides essential raw materials for national economic development and is an energy- and resource-intensive industry with high energy and resource consumption. While producing steel products, it also emits large amounts of waste, causing serious environmental pollution. Similar industries include many high-energy-consuming industries such as non-ferrous metal smelting, calcium carbide production, and the production of refractory materials such as corundum. These industries are not only major energy consumers and polluters in the industrial sector, but also have the greatest potential for energy conservation and emission reduction. Among these, the recovery and utilization of waste heat from the production process is one of the most promising energy-saving and environmental protection technologies. Taking blast furnace steelmaking and ironmaking as an example, smelting one ton of pig iron in a blast furnace produces approximately 0.3 to 0.6 tons of blast furnace slag. In 2022, China's crude steel output was 1 billion tons. Even assuming a minimum slag / ton of iron production, the amount of by-product blast furnace slag would exceed 300 million tons. Molten blast furnace slag has a temperature exceeding 1500℃ and is rich in high-grade sensible heat, making it one of the most promising materials for waste heat recovery and utilization. However, the more traditional processing method currently used is water quenching, which involves rapidly cooling the molten blast furnace slag with a large amount of cooling water to achieve the purpose of cooling and crushing the slag. This process consumes a large amount of cooling water resources, generally requiring about 10 tons of slag flushing water per ton of blast furnace slag, of which at least 1 ton is lost as steam. The disadvantages of this process are obvious: it not only fails to recover and reuse the high-grade sensible heat of the blast furnace slag, severely reducing the effective utilization efficiency of energy, but also causes a large waste of water resources, seriously pollutes the atmospheric and soil environment, and deteriorates people's living and working environment.

[0003] In light of this, in recent years, more and more steel companies have adopted centrifugal granulation waste heat recovery technology to recover waste heat from blast furnace slag. Centrifugal granulation waste heat recovery technology can form small particles from molten high-temperature materials through centrifugal granulation under the combined action of centrifugal force, gravity, surface tension, and friction. These particles are then rapidly cooled by cooling air, realizing the transfer and recovery of heat from molten high-temperature materials to hot air. The hot air is then provided to hot blast stoves or other equipment as a heat source for utilization.

[0004] Existing centrifugal granulation waste heat recovery devices mainly include a buffer tank, a granulation unit, and a guide pipe connecting the buffer tank and the granulation unit. Molten high-temperature material flows from the buffer tank into the granulation plate of the granulation unit through the guide pipe. However, the molten high-temperature material experiences heat loss when passing through the guide pipe. The decrease in temperature can easily lead to an increase in viscosity, which adversely affects the granulation effect. Furthermore, excessive cooling can cause the material to solidify and block the guide pipe. Summary of the Invention

[0005] The problem to be solved by this invention is: how to reduce the heat loss of molten high-temperature materials in the guide tube.

[0006] The present invention provides a centrifugal granulation waste heat recovery device, comprising: a buffer mechanism, a guide pipe, a granulation mechanism, and a heat preservation mechanism. The guide pipe is connected between the buffer mechanism and the granulation mechanism, and the heat preservation mechanism is used to cover the guide pipe and to keep the guide pipe warm.

[0007] The present invention provides a centrifugal granulation waste heat recovery device, which, compared with the prior art, has, but is not limited to, the following beneficial effects:

[0008] The centrifugal granulation waste heat recovery device of this invention includes a buffer mechanism for storing high-temperature molten materials. These materials are guided into the granulation mechanism via a flow guide pipe. Under centrifugal force, the molten materials are dispersed into small molten droplets and gradually cool and solidify during flight. High-grade hot air is obtained through heat exchange and can be used as a heat source downstream. During the flow process, a heat preservation mechanism insulates the flow guide pipe, reducing heat loss from the molten materials. This minimizes the adverse effects of increased viscosity due to temperature drops on the granulation effect and avoids the risk of material solidification and blockage of the flow guide pipe due to excessive temperature drop.

[0009] Optionally, the insulation mechanism includes a first half-cylinder, a second half-cylinder, and an opening and closing assembly. The first half-cylinder and the second half-cylinder are used to achieve relative movement through the opening and closing assembly to form a cylinder, so as to cover the guide pipe between the first half-cylinder and the second half-cylinder.

[0010] Optionally, the opening and closing assembly includes a first rack and pinion slider, a second rack and pinion slider, and a synchronizing gear. The first rack and pinion slider is connected to the first half-cylinder, the second rack and pinion slider is connected to the second half-cylinder, and the synchronizing gear is driven between the first rack and pinion slider and the second rack and pinion slider to drive the first rack and pinion slider and the second rack and pinion slider to move relative to each other.

[0011] Optionally, the opening and closing assembly further includes a first bracket and a first driving mechanism. The first bracket is provided with two horizontal slide rails. The first rack slider and the second rack slider are slidably connected to the two horizontal slide rails respectively. The first driving mechanism is drivenly connected to the synchronous gear or the first rack slider or the second rack slider.

[0012] Optionally, the centrifugal granulation waste heat recovery device further includes a flow regulating mechanism, which includes an upper fixed plate, a lower fixed plate, and an intermediate sliding plate. The upper fixed plate is connected to the outlet of the buffer mechanism, and the inlet end of the guide pipe is connected to the lower fixed plate. The upper fixed plate and the lower fixed plate have a first through hole coaxially arranged with the outlet of the buffer mechanism. The intermediate sliding plate is located between the upper fixed plate and the lower fixed plate and is slidably connected to the upper fixed plate and the lower fixed plate respectively. The intermediate sliding plate has a second through hole for communicating with the first through hole of the upper fixed plate and the lower fixed plate.

[0013] Optionally, the granulation mechanism includes a granulation disc, a granulation chamber, and a second drive mechanism. The granulation disc is disposed in the granulation chamber, and the second drive mechanism is drivenly connected to the granulation disc. The second drive mechanism is used to drive the granulation disc to rotate at high speed.

[0014] Optionally, the guide pipe includes a first pipe structure and a second pipe structure that are interconnected. The first pipe structure is connected to the outlet of the buffer mechanism, and the second pipe structure is connected to the granulation chamber. The second pipe structure is used to guide the high-temperature molten material to fall onto the granulation plate.

[0015] Optionally, the centrifugal granulation waste heat recovery device further includes a support plate, which is connected to the upper end of the second tube structure. The inner diameter of the second tube structure is equal to the outer diameter of the first tube structure. The support plate is used to drive the second tube structure to move axially along the first tube structure.

[0016] Optionally, the centrifugal granulation waste heat recovery device further includes a lifting mechanism, which is drivenly connected to the pallet and is used to drive the pallet and the second pipe structure connected to the pallet to move axially along the first pipe structure.

[0017] Optionally, the buffer mechanism includes a buffer tank, a second support, and a preheating mechanism. The buffer tank is disposed on the second support, and the preheating mechanism is disposed on the buffer tank. The preheating mechanism is used to keep the high-temperature molten material in the buffer tank warm. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the centrifugal granulation waste heat recovery device according to an embodiment of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the centrifugal granulation waste heat recovery device according to an embodiment of the present invention. Figure 2 ;

[0020] Figure 3This is a schematic diagram of the structure of the centrifugal granulation waste heat recovery device according to an embodiment of the present invention. Figure 3 ;

[0021] Figure 4 This is a top view of the centrifugal granulation waste heat recovery device according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Buffer tank; 2. Guide pipe; 21. First pipe structure; 22. Second pipe structure; 3. Granulation mechanism; 31. Granulation disc; 32. Granulation chamber; 33. Second drive mechanism; 41. First half-cylinder; 42. Second half-cylinder; 43. First rack and pinion slider; 44. Second rack and pinion slider; 45. Synchronous gear; 5. Flow regulation mechanism; 51. Upper fixed plate; 52. Lower fixed plate; 53. Intermediate slide plate; 6. Support plate. Detailed Implementation

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] In the description of this invention, the orientations or positional relationships indicated by terms such as "up," "down," "left," "right," "top," "bottom," "front," "back," "inner," and "outer" are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this invention. They are not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0028] Furthermore, in the attached diagram, the Z-axis represents the vertical direction, that is, the up and down position, and the positive direction of the Z-axis (that is, the direction the arrow points to) represents up, and the negative direction of the Z-axis (that is, the direction opposite to the positive direction of the Z-axis) represents down; in the attached diagram, the X-axis represents the horizontal direction, that is, the left and right position, and the positive direction of the X-axis (that is, the direction the arrow points to) represents left, and the negative direction of the X-axis (that is, the direction opposite to the positive direction of the X-axis) represents right.

[0029] It should also be noted that the meanings of the aforementioned Z-axis and X-axis are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0030] like Figure 1 As shown, the centrifugal granulation waste heat recovery device of this invention includes: a buffer mechanism, a guide pipe 2, a granulation mechanism 3, and a heat preservation mechanism. The guide pipe 2 is connected between the buffer mechanism and the granulation mechanism 3. The heat preservation mechanism is used to cover the guide pipe 2 and to keep the guide pipe 2 warm.

[0031] In this embodiment, in conjunction with the appendix Figure 1 As shown, the buffer mechanism can be used to store high-temperature molten materials. The high-temperature molten materials in the buffer mechanism can be guided into the granulation mechanism 3 through the guide pipe 2. The high-temperature molten materials can be dispersed into molten droplets by centrifugal force and other forces in the granulation mechanism 3, and gradually cool and solidify during flight. High-grade hot air is obtained through heat exchange, and the hot air can be used as a heat source downstream. During the flow process in the guide pipe 2, the insulation mechanism can insulate the guide pipe 2 to reduce heat loss from the high-temperature molten materials. This reduces the adverse effects of increased viscosity due to temperature drop on the granulation effect and avoids the risk of material solidification and blockage of the guide pipe 2 due to excessive temperature drop.

[0032] Optionally, the heat preservation mechanism includes a first half-cylinder 41, a second half-cylinder 42, and an opening and closing assembly. The first half-cylinder 41 and the second half-cylinder 42 are used to achieve relative movement through the opening and closing assembly to form a cylinder, so as to cover the guide pipe 2 between the first half-cylinder 41 and the second half-cylinder 42.

[0033] In this embodiment, in conjunction with the appendix Figure 1 and attached Figure 2 As shown, both the first half-cylinder 41 and the second half-cylinder 42 are heat insulation cover structures. The first half-cylinder 41 and the second half-cylinder 42 can achieve relative movement through the opening and closing components to form a cylinder. That is, after the first half-cylinder 41 and the second half-cylinder 42 are joined together, they form a complete heat insulation cover, so that the guide pipe 2 is covered inside, which plays a role in heat preservation.

[0034] In other embodiments, the inner walls of the first half-cylinder 41 and the second half-cylinder 42 may be provided with protrusion structures respectively. When the guide pipe 2 is covered between the first half-cylinder 41 and the second half-cylinder 42, the protrusion structures of the first half-cylinder 41 and the second half-cylinder 42 can support the guide pipe 2 and prevent the guide pipe 2 from falling off and causing a safety accident.

[0035] Optionally, the opening and closing assembly includes a first rack and pinion slider 43, a second rack and pinion slider 44, and a synchronizing gear 45. The first rack and pinion slider 43 is connected to the first half-cylinder 41, the second rack and pinion slider 44 is connected to the second half-cylinder 42, and the synchronizing gear 45 is driven between the first rack and pinion slider 43 and the second rack and pinion slider 44 to drive the first rack and pinion slider 43 and the second rack and pinion slider 44 to move relative to each other.

[0036] In this embodiment, in conjunction with the appendix Figure 1 Appendix Figure 2 and attached Figure 4 As shown, the first rack and pinion slider 43 can be bolted to the outer wall of the first half-cylinder 41, and the second rack and pinion slider 44 can be bolted to the outer wall of the second half-cylinder 42. A synchronizing gear 45 meshes between the first rack and pinion slider 43 and the second rack and pinion slider 44; that is, the rotation of the synchronizing gear 45 drives the first rack and pinion slider 43 and the second rack and pinion slider 44 to move relative to each other. (See attached diagram) Figure 1 Or attached Figure 2 (in the X-axis direction) to drive the first half-cylinder 41 and the second half-cylinder 42 to achieve opening and closing actions.

[0037] Optionally, the opening and closing assembly further includes a first bracket and a first drive mechanism. The first bracket is provided with two horizontal slide rails. The first rack slider 43 and the second rack slider 44 are slidably connected to the two horizontal slide rails respectively. The first drive mechanism is drivenly connected to the synchronous gear 45 or the first rack slider 43 or the second rack slider 44.

[0038] In this embodiment, the first rack slider 43 and the second rack slider 44 can move along two horizontal slide rails on the first bracket, thereby ensuring the movement paths of the first half cylinder 41 and the second half cylinder 42 and achieving accurate docking. In addition, the synchronous gear 45 can be connected to the first bracket in the form of an intermediate shaft. The first driving mechanism can be a rotary driving part such as a motor, or a linear driving part such as a hydraulic cylinder or a pneumatic cylinder. If the first driving mechanism is a rotary driving part such as a motor, its output shaft is connected to the synchronous gear 45 to drive the synchronous gear 45 to rotate, thereby driving the first rack slider 43 and the second rack slider 44 to move relative to each other; if the first driving mechanism is a linear driving part such as a hydraulic cylinder or a pneumatic cylinder, its telescopic end can be connected to the first rack slider 43 or the second rack slider 44 to drive the first rack slider 43 or the second rack slider 44 to move linearly, and under the action of the synchronous gear 45, the first rack slider 43 and the second rack slider 44 can be driven to move relative to each other simultaneously.

[0039] Optionally, the centrifugal granulation waste heat recovery device further includes a flow regulating mechanism 5. The flow regulating mechanism 5 includes an upper fixing plate 51, a lower fixing plate 52 and an intermediate sliding plate 53. The upper fixing plate 51 is connected to the discharge port of the buffer mechanism, the feed end of the diversion pipe 2 is connected to the lower fixing plate 52. The upper fixing plate 51 and the lower fixing plate 52 are provided with first through holes coaxially arranged with the discharge port of the buffer mechanism. The intermediate sliding plate 53 is located between the upper fixing plate 51 and the lower fixing plate 52 and is slidably connected to the upper fixing plate 51 and the lower fixing plate 52 respectively. The intermediate sliding plate 53 is provided with a second through hole for communicating with the first through holes of the upper fixing plate 51 and the lower fixing plate 52.

[0040] In this embodiment, in combination with the attached Figure 3 As shown, a flow regulating mechanism 5 is provided between the discharge port of the buffer tank 1 and the feed end of the diversion pipe 2. The upper fixing plate 51 can be connected to the bottom of the buffer tank 1 by bolts (in the negative Z-axis direction in the attachment Figure 3 ), wherein the overall shape of the upper fixing plate 51 can be a "convex" shape, and its protruding end can be inserted into the discharge port of the buffer tank 1. The overall shape of the lower fixing plate 52 can be an inverted "convex" shape, and the protruding end of the lower fixing plate 52 can be inserted into the feed end of the diversion pipe 2. The intermediate sliding plate 53 can be slidably connected between the upper fixing plate 51 and the lower fixing plate 52 in the form of a slide rail. By the relative sliding of the intermediate sliding plate 53, the high-temperature molten material can be diverted from the buffer tank 1 to the diversion pipe 2 according to the flow rate requirements.

[0041] Optionally, the granulation mechanism 3 includes a granulation disk 31, a granulation chamber 32, and a second drive mechanism 33. The granulation disk 31 is disposed in the granulation chamber 32, and the second drive mechanism 33 is drivenly connected to the granulation disk 31. The second drive mechanism 33 is used to drive the granulation disk 31 to rotate at high speed.

[0042] In this embodiment, in conjunction with the appendix Figure 2 As shown in Figure 3, the granulation disc 31 is arranged in the granulation chamber 32. The second drive mechanism 33 can be a motor to drive the granulation disc 31 to rotate at high speed. The high-speed rotating granulation disc 31 can disperse the high-temperature molten material into molten droplets under the action of centrifugal force, etc., and gradually cool and solidify during flight. High-grade hot air is obtained through heat exchange, and the hot air can be transported downstream as a heat source for utilization.

[0043] Optionally, the guide pipe 2 includes a first pipe structure 21 and a second pipe structure 22 that are interconnected. The first pipe structure 21 is connected to the outlet of the buffer mechanism, and the second pipe structure 22 is connected to the granulation chamber 32. The second pipe structure 22 is used to guide the high-temperature molten material to fall onto the granulation disk 31.

[0044] In this embodiment, in conjunction with the appendix Figure 1 Or attached Figure 2 As shown, the guide tube 2 includes a first tube structure 21 and a second tube structure 22 that are interconnected. The first tube structure 21 and the second tube structure 22 can be connected by an insertion. The lower end of the second tube structure 22 extends into the granulation chamber 32. Since the guide tube 2 is a vulnerable part and requires preheating, it needs to be easy and quick to replace. By designing it as a split structure of the first tube structure 21 and the second tube structure 22, only the first tube structure 21 needs to be replaced, and it is easy to disassemble.

[0045] Optionally, the centrifugal granulation waste heat recovery device further includes a support plate 6, which is connected to the upper end of the second tube structure 22. The inner diameter of the second tube structure 22 is equal to the outer diameter of the first tube structure 21. The support plate 6 is used to drive the second tube structure 22 to move along the axial direction of the first tube structure 21.

[0046] In this embodiment, in conjunction with the appendix Figure 1 Appendix Figure 3 and attached Figure 4As shown, the cross-section of the outer wall of the second tube structure 22 gradually increases from bottom to top, and a shoulder structure is provided at the upper end of the second tube structure 22. The overall structure of the support plate 6 includes interconnected ring parts and rods. The ring parts of the support plate 6 can be bolted to the lower end of the shoulder structure. Since the inner diameter of the second tube structure 22 is equal to the outer diameter of the first tube structure 21, the second tube structure 22 can be moved upward along the first tube structure 21 by manually holding the rod of the support plate 6. That is, the second tube structure 22 can be moved upward along the first tube structure 21 to, for example, the attached... Figure 3 The location of the second pipe structure 22 is shown in the appendix (see appendix for the change in its position). Figure 2 and attached Figure 3 At this time (attached) Figure 3 (Position of the second tube structure 22) The second tube structure 22 is equivalent to being sleeved on the first tube structure 21. At this time, there is a gap between the lower end of the first tube structure 21 and the granulation mechanism 3 (the upper end of the granulation chamber 32), so that the guide tube 2 can be completely disassembled from the granulation mechanism 3 and the buffer mechanism to achieve quick replacement.

[0047] Optionally, the centrifugal granulation waste heat recovery device further includes a lifting mechanism, which is drivenly connected to the pallet 6. The lifting mechanism is used to drive the pallet 6 and the second pipe structure 22 connected to the pallet 6 to move along the axial direction of the first pipe structure 21.

[0048] In this embodiment, the lifting mechanism can be an existing lifting device such as a hydraulic or electro-hydraulic actuator or lead screw, that is, it can drive the pallet 6 to lift.

[0049] Optionally, the buffer mechanism includes a buffer tank 1, a second support, and a preheating mechanism. The buffer tank 1 is disposed on the second support, and the preheating mechanism is disposed on the buffer tank 1. The preheating mechanism is used to keep the high-temperature molten material in the buffer tank 1 warm.

[0050] In this embodiment, the buffer tank 1 can be arranged on the second support (not shown in the figure). The second support supports the buffer tank 1, and the buffer tank 1 is also provided with a preheating mechanism. The preheating mechanism can be an electric heating plate installed on the outer wall of the buffer tank 1, which plays the role of heat preservation for the high-temperature molten material, so as to reduce the heat loss of the material during the buffering process.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0052] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A centrifugal granulation waste heat recovery device, characterized by, The application relates to a granulating device for granulating a material, which comprises a buffer mechanism, a flow guide pipe (2), a granulating mechanism (3) and a heat preservation mechanism, the flow guide pipe (2) is connected between the buffer mechanism and the granulating mechanism (3), the heat preservation mechanism is used for covering the flow guide pipe (2) and preserving heat of the flow guide pipe (2); the heat preservation mechanism comprises a first half cylinder (41), a second half cylinder (42) and an opening and closing assembly, the first half cylinder (41) and the second half cylinder (42) are used for realizing relative movement through the opening and closing assembly to form a cylinder so as to cover the flow guide pipe (2) between the first half cylinder (41) and the second half cylinder (42); the opening and closing assembly comprises a first rack slider (43), a second rack slider (44) and a synchronous gear (45), the first rack slider (43) is connected to the first half cylinder (41), the second rack slider (44) is connected to the second half cylinder (42), and the synchronous gear (45) is drivingly connected between the first rack slider (43) and the second rack slider (44) and used for driving the first rack slider (43) and the second rack slider (44) to move relatively. The opening and closing assembly further comprises a first support and a first driving mechanism, two horizontal sliding rails are formed in the first support, the first rack slider (43) and the second rack slider (44) are slidingly connected to the two horizontal sliding rails respectively, and the first driving mechanism is drivingly connected with the synchronous gear (45) or the first rack slider (43) or the second rack slider (44).

2. The centrifugal granulation waste heat recovery device according to claim 1, characterized by, The application further comprises a flow adjusting mechanism (5), the flow adjusting mechanism (5) comprises an upper fixed plate (51), a lower fixed plate (52) and a middle sliding plate (53), the upper fixed plate (51) is connected to a discharging port of the buffer mechanism, a feeding end of the flow guide pipe (2) is connected to the lower fixed plate (52), the upper fixed plate (51) and the lower fixed plate (52) are provided with first through holes coaxially arranged with the discharging port of the buffer mechanism, the middle sliding plate (53) is located between the upper fixed plate (51) and the lower fixed plate (52) and is slidingly connected with the upper fixed plate (51) and the lower fixed plate (52) respectively, and the middle sliding plate (53) is provided with second through holes for communicating with the first through holes of the upper fixed plate (51) and the lower fixed plate (52).

3. The centrifugal granulation waste heat recovery device according to claim 2, characterized by, The granulating mechanism (3) comprises a granulating disc (31), a granulating chamber (32) and a second driving mechanism (33), the granulating disc (31) is arranged in the granulating chamber (32), the second driving mechanism (33) is drivingly connected with the granulating disc (31), and the second driving mechanism (33) is used for driving the granulating disc (31) to rotate at high speed.

4. The centrifugal granulation waste heat recovery device according to claim 1, characterized by, ​ 5. The centrifugal granulation waste heat recovery device according to claim 4, characterized in that, The flow guide pipe (2) comprises a first pipe structure (21) and a second pipe structure (22) which are communicated with each other, the first pipe structure (21) is connected to the discharge port of the buffer mechanism, the second pipe structure (22) is connected to the granulation chamber (32), and the second pipe structure (22) is used for guiding the high-temperature molten material to fall on the granulation disc (31).

6. The centrifugal granulation waste heat recovery device according to claim 5, characterized in that, Further comprising a supporting plate (6) which is connected to the upper end of the second pipe structure (22), the inner diameter of the second pipe structure (22) is equal to the outer diameter of the first pipe structure (21), and the supporting plate (6) is used for driving the second pipe structure (22) to move along the axial direction of the first pipe structure (21).

7. The centrifugal granulation waste heat recovery device according to claim 6, characterized in that, Further comprising a lifting mechanism which is drivingly connected with the supporting plate (6), and the lifting mechanism is used for driving the supporting plate (6) and the second pipe structure (22) connected with the supporting plate (6) to move along the axial direction of the first pipe structure (21).

8. The waste heat recovery device according to any one of claims 1 to 7, wherein The buffer mechanism comprises a buffer tank (1), a second support and a preheating mechanism, the buffer tank (1) is arranged on the second support, and the preheating mechanism is arranged on the buffer tank (1), and the preheating mechanism is used for heat preservation of the high-temperature molten material in the buffer tank (1).

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