Enhanced cooling device and waste heat recovery system for graphitization kilns

Abstract

This utility model belongs to the field of graphite material production technology, and discloses an enhanced cooling device and waste heat recovery system for graphitization kilns. The enhanced cooling device for graphitization kilns includes a material storage and cooling component, a heat exchange component, an air supply component, and a solid-gas separation component. The material storage and cooling component includes a material storage module and a cooling module. The material storage module stores and supplies heat exchange particles, and the cooling module cools the heat exchange particles. The heat exchange component includes a movable heat exchange module. The air supply component receives the heat exchange particles from the material storage module and can generate airflow to drive the heat exchange particles to form a gas-solid fluid flow through the heat exchange module. The solid-gas separation component separates the heat exchange particles in the gas-solid fluid so that the heat exchange particles enter the material storage module. By transporting the heat exchange particles into the heat exchange module for heat exchange with the graphitization kiln, the cooling cycle is shortened, production efficiency is improved, and the movable heat exchange module reduces the difficulty of implementation.

Description

Technical Field

[0001] This utility model relates to the field of graphite material production technology, and in particular to an enhanced cooling device and waste heat recovery system for graphitization kilns. Background Technology

[0002] In the operation of the graphitization kiln, electrodes are used as a heat source to efficiently heat the kiln, enabling its internal temperature to reach a peak of 3000℃. After the heating stage is completed, the cooling stage begins. Once the surface temperature has cooled to 500℃, a suction device is used to discharge the cooled insulation material or product, and this process is repeated until the discharge is complete.

[0003] Currently, two main cooling methods are used: natural cooling and fixed heat exchange equipment connected to the outside of the graphitization kiln. However, when using natural cooling, according to the current process, it takes about 8 hours to cool a 15cm thick material to below 500℃, which extends the single kiln discharge cycle to more than 20 days, severely restricting production efficiency and product output rate. When using fixed heat exchange equipment connected to the outside of the graphitization kiln, the kiln moves during the discharge process, making the implementation of the fixed heat exchange equipment difficult. In addition, whether using natural cooling or heat exchange equipment, the entire top area of ​​the graphitization kiln must be cooled before subsequent operations can proceed, greatly extending the production cycle and resulting in serious energy waste. A large amount of heat energy released during the cooling process is not effectively recovered and utilized, resulting in poor energy utilization.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] The purpose of this utility model is to provide an enhanced cooling device and waste heat recovery system for graphitization kilns, which has at least one of the following beneficial effects: shorter cooling cycle, higher production efficiency, higher energy utilization rate, and ease of implementation.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On the one hand, this utility model provides an enhanced cooling device for graphitization kilns, including a material storage cooling assembly, a heat exchange assembly, an air supply assembly, and a solid-gas separation assembly, wherein:

[0008] The material storage and cooling assembly includes a material storage module and a cooling module. The material storage module is used to store and supply heat exchange particles and is provided with an inlet and an outlet. The cooling module is used to cool the heat exchange particles.

[0009] The heat exchange assembly includes a movable heat exchange module that can be brought close to or away from the graphitization kiln. The heat exchange module is provided with a heat exchange channel, which is provided with a heat exchange inlet and a heat exchange outlet.

[0010] The air supply component is disposed between the discharge port and the heat exchange inlet. The air supply component is used to receive the heat exchange particles in the storage module and can generate airflow to drive the heat exchange particles to form a gas-solid fluid that flows through the heat exchange module.

[0011] The solid-gas separation component is disposed between the heat exchange outlet and the feed inlet to separate the heat exchange particles in the gas-solid fluid so that the heat exchange particles enter the storage module.

[0012] Optionally, the storage module includes a storage bin, and the cooling module includes a jacketed heat exchanger disposed outside the storage bin.

[0013] Optionally, the storage silo is vertically positioned with a height-to-diameter ratio of A, and satisfies 5≤A≤7.

[0014] Optionally, the feed inlet is located at the top of the storage silo, the discharge outlet is located at the bottom of the storage silo, and the jacketed heat exchanger is provided with a cooling medium inlet and a cooling medium outlet. The cooling medium inlet is located at the bottom of the jacketed heat exchanger, and the cooling medium outlet is located at the top of the jacketed heat exchanger.

[0015] Optionally, the storage bin includes a bin body and a bin cover, the bin cover being placed on the bin body to close the bin body, and the bin cover being a transparent cover.

[0016] Optionally, the lower part of the storage silo is in the shape of an inverted cone.

[0017] Optionally, the heat exchange module includes multiple heat exchange tubes arranged in parallel and heat exchange fins connected to both sides of the heat exchange tubes.

[0018] Optionally, the heat exchange assembly includes a flexible pipe, and both the heat exchange inlet and the heat exchange outlet of the heat exchange module are connected to the flexible pipe.

[0019] Optionally, the heat exchange assembly includes an elbow, and the heat exchange inlet and heat exchange outlet of the heat exchange module are both connected to the elbow. One end of the elbow is connected to the heat exchange module, and the other end extends away from the graphitization kiln and is connected to the flexible pipe.

[0020] Optionally, the heat exchange module can be moved to contact the top of the graphitization kiln.

[0021] Optionally, the heat exchange module further includes at least one movable connection structure disposed on the heat exchange fins. The movable connection structure includes a lifting lug. The enhanced cooling device for the graphitization kiln further includes a gantry crane connected to the lifting lug for driving the heat exchange module to move.

[0022] Optionally, the heat exchange module further includes multiple temperature sensors connected to the heat exchange fins and protruding from the heat exchange module towards the side closer to the graphitization kiln. Each temperature sensor has multiple temperature measuring points at different distances from the heat exchange module.

[0023] Optionally, the enhanced cooling device for the graphitization kiln further includes a distributor and a confluencer. The distributor and the confluencer each include a variable-diameter body, a main interface, and multiple branch interfaces. The variable-diameter body has a larger diameter end and a smaller diameter end. The main interface is located at the smaller diameter end, and the multiple branch interfaces are located at the larger diameter end. One end of each heat exchange tube of the heat exchange module is connected to one of the multiple branch interfaces of the distributor through a flexible pipe. The other end of each heat exchange tube of the heat exchange module is connected to one of the multiple branch interfaces of the confluencer through a flexible pipe. The main interface of the distributor leads to the air supply assembly, and the main interface of the confluencer leads to the solid-gas separation assembly.

[0024] Optionally, the variable diameter body is conical, and the inclination angle of the wall of the variable diameter body is θ, satisfying 20°≤θ≤30°.

[0025] Optionally, the air supply assembly includes an air supply module and a J-shaped valve. The air supply module is used to provide airflow to the J-shaped valve. The J-shaped valve includes a descending section, a horizontal section, and an ascending section connected in sequence. The top of the descending section of the J-shaped valve is provided with a heat exchange particle inlet, which is connected to the discharge port of the storage module. The end of the ascending section is connected with a heat exchange particle outlet. The lower part of the descending section is provided with a loosening air interface. The horizontal section is provided with a fluidizing air interface, which is set corresponding to the ascending section. The heat exchange particle outlet is also provided with a main air inlet.

[0026] Optionally, a gate valve is also provided between the heat exchange particle inlet and the discharge port of the storage module.

[0027] Optionally, the horizontal section of the J-shaped valve is further provided with a discharge port.

[0028] Optionally, the air supply module includes an air source, an air supply main pipe connected to the air source, and an air supply main pipe, a loosening air branch pipe, and a fluidizing air branch pipe disposed on the air supply main pipe; the air source includes a fan, the air supply main pipe is connected to the main air inlet, the loosening air branch pipe is connected to the loosening air interface, and the fluidizing air branch pipe is connected to the fluidizing air interface.

[0029] Optionally, the solid-gas separation assembly includes a cyclone separator.

[0030] On the other hand, this utility model provides a waste heat recovery system, including the enhanced cooling device for graphitization kilns, which recovers waste heat by utilizing the heat of the cooling module of the material storage cooling assembly.

[0031] The beneficial effects of this utility model are:

[0032] This invention provides an enhanced cooling device for graphitization kilns, comprising a material storage cooling assembly, a heat exchange assembly, an air supply assembly, and a solid-gas separation assembly. The air supply assembly of this enhanced cooling device for graphitization kilns receives heat exchange particles from the material storage module and transports the gas-solid fluid formed by mixing the heat exchange particles with its own generated airflow to the heat exchange module. This allows for heat exchange with the graphitization kiln in contact with the heat exchange module, accelerating the cooling rate of the graphitization kiln and significantly shortening the cooling cycle. Furthermore, by setting a movable heat exchange module on the graphitization kiln, the heat exchange module is independently set up from the graphitization kiln, avoiding heat exchange... The module reduces the difficulty of implementation by minimizing interference in subsequent processes of the graphitization kiln. More importantly, it allows for material suction operations on areas that have already been cooled, enabling simultaneous cooling and material suction, which significantly shortens the production cycle and improves production efficiency. In addition, the gas-solid fluid that has completed heat exchange in the graphitization kiln is separated by a solid-gas separator, and the separated heat exchange particles are returned to the storage module. The cooling module in the storage cooling assembly then cools the heat exchange particles. Furthermore, the recovered heat can be used to power other equipment, thereby reducing resource waste and improving energy utilization.

[0033] This utility model also provides a waste heat recovery system. This waste heat recovery system recovers the heat during the cooling process of heat exchange particles by utilizing the cooling module of the storage cooling component. The recovered heat can be used to power other equipment, thereby reducing resource waste and improving energy utilization. Attached Figure Description

[0034] Figure 1 This is a flow diagram of the enhanced cooling device for graphitization kilns provided by this utility model;

[0035] Figure 2 This is an assembly drawing of the enhanced cooling device for graphitization kilns provided by this utility model;

[0036] Figure 3 This is a schematic diagram of the heat exchange module in the enhanced cooling device for graphitization kilns provided by this utility model.

[0037] Figure 4 This is a schematic diagram of the air supply main pipe in the enhanced cooling device for graphitization kilns provided by this utility model.

[0038] Figure 5 This is a front view of the distributor in the enhanced cooling device for graphitization kilns of this utility model;

[0039] Figure 6 This is a top view of the distributor in the enhanced cooling device for graphitization kilns of this utility model;

[0040] Figure 7 This is a schematic diagram of the structure of the temperature sensing element in the enhanced cooling device for graphitization kilns of this utility model when measuring the temperature of the insulation layer.

[0041] In the picture:

[0042] 100. Insulation layer;

[0043] 1. Storage and cooling assembly; 11. Storage silo; 12. Jacketed heat exchanger; 121. Cooling medium inlet; 122. Cooling medium outlet;

[0044] 2. Heat exchange components; 21. Heat exchange modules; 211. Heat exchange tubes; 212. Heat exchange fins; 213. Lifting lugs; 214. Temperature sensors; 22. Flexible pipes; 23. Elbows;

[0045] 3. Air supply assembly; 31. Air supply module; 311. Air source; 312. Main air supply pipe; 313. Main air supply pipe; 314. Loosening air branch pipe; 315. Fluidizing air branch pipe; 32. J-valve; 321. Descending section; 322. Horizontal section; 323. Ascending section; 324. Loosening air interface; 325. Fluidizing air interface; 326. Main air inlet; 327. Discharge port; 33. Gate valve;

[0046] 4. Cyclone separator;

[0047] 5. Diverter; 51. Variable diameter body; 52. Main interface; 53. Branch interface;

[0048] 6. Combiner;

[0049] 7. Ascending pipe;

[0050] 8. Downcomer. Detailed Implementation

[0051] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0052] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0055] In the operation of the graphitization kiln, electrodes are used as a heat source to efficiently heat the kiln, enabling its internal temperature to reach a peak of 3000℃. After the heating stage is completed, the cooling stage begins. Once the surface temperature has cooled to 500℃, a suction device is used to discharge the cooled insulation material or product, and this process is repeated until the discharge is complete.

[0056] Currently, two main cooling methods are used: natural cooling and fixed heat exchange equipment connected to the outside of the graphitization kiln. However, when using natural cooling, according to the current process, it takes about 8 hours to cool a 15cm thick material to below 500℃, which lengthens the single kiln discharge cycle to more than 20 days, severely restricting production efficiency and product output rate. On the other hand, when using fixed heat exchange equipment connected to the outside of the graphitization kiln, the kiln moves during the discharge process, making it difficult to implement. In addition, both natural cooling and heat exchange equipment result in significant energy waste, as a large amount of heat released during cooling is not effectively recovered and utilized, resulting in poor energy utilization.

[0057] Therefore, in order to achieve at least one of the beneficial effects of shortening the cooling cycle, improving production efficiency, reducing resource waste, and improving ease of implementation, this embodiment provides an enhanced cooling device for graphitization kilns.

[0058] like Figures 1 to 7 As shown, the enhanced cooling device for graphitization kilns includes a storage cooling component 1, a heat exchange component 2, an air supply component 3, and a solid-gas separation component. The storage cooling component 1 includes a storage module and a cooling module. The storage module is used to store and supply heat exchange particles and is provided with an inlet and an outlet. The cooling module is used to cool the heat exchange particles. The heat exchange component 2 includes a movable heat exchange module 21, which can be close to or away from the graphitization kiln. The heat exchange module 21 is provided with a heat exchange channel, which is provided with a heat exchange inlet and a heat exchange outlet. The air supply component 3 is located between the outlet and the heat exchange inlet. The air supply component 3 is used to receive the heat exchange particles in the storage module and can generate airflow to drive the heat exchange particles to form a gas-solid fluid that flows through the heat exchange module 21. The solid-gas separation component is located between the heat exchange outlet and the inlet and is used to separate the heat exchange particles in the gas-solid fluid so that the heat exchange particles can enter the storage module.

[0059] The air supply component 3 of the enhanced cooling device for graphitization kilns receives heat exchange particles from the storage module and transports the gas-solid fluid formed by mixing the heat exchange particles with its own generated airflow to the heat exchange module 21. This allows for heat exchange with the graphitization kiln in contact with the heat exchange module 21, accelerating the cooling rate of the graphitization kiln and significantly shortening the cooling cycle. Furthermore, by setting a movable heat exchange module 21 on the graphitization kiln, the heat exchange module 21 is independently set up from the graphitization kiln, avoiding interference from the heat exchange module 21 in subsequent processes of the graphitization kiln and reducing the actual cost. The main difficulty lies in the fact that the heat exchange module 21 can be moved to perform material suction on the area that has been cooled first, so that cooling and material suction can be carried out simultaneously, which greatly shortens the production cycle and improves production efficiency. In addition, the gas-solid fluid that has completed heat exchange in the graphitization kiln is separated by a solid-gas separator, and the separated heat exchange particles are returned to the storage module. By using the cooling module in the storage cooling component 1 to cool the heat exchange particles, heat can be further recovered to power other equipment, thereby reducing resource waste and improving energy utilization.

[0060] In this embodiment, the enhanced cooling device for the graphitization kiln mainly cools and lowers the temperature of the insulation layer 100 at the top of the kiln. The heat exchange particles used for heat exchange with the insulation layer 100 are ceramic particles. Ceramic particles are an inorganic non-metallic material with high thermal conductivity, good heat resistance, and good wear resistance. Their thermal conductivity is greater than 120 W / m·K, and they can withstand temperatures above 1600℃. In this embodiment, the selected ceramic particles have a particle size of 40 mesh to ensure smooth flow within the system. The particle size can be freely adjusted according to actual usage requirements. The medium used to cool the heat exchange particles in the cooling module is condensate. After heat exchange with the ceramic particles flowing in the storage module, the water temperature rises, thereby recovering the waste heat from the ceramic particles and using it as an energy resource for other equipment. Optionally, the ceramic particles can be, for example, silicon carbide (SiC) particles, which have good heat resistance, thermal conductivity, and wear resistance. It is understood that in other embodiments, other materials with both good heat resistance and thermal conductivity can be selected as ceramic particles.

[0061] Optionally, the storage module includes a storage silo 11, and the cooling module includes a jacketed heat exchanger 12 disposed outside the storage silo 11. The jacketed heat exchanger 12 can be equipped with a cooling medium to cool the heat exchange particles in the storage silo 11. By providing a jacketed heat exchanger 12 filled with cooling medium outside the storage silo 11, the storage silo 11 containing the heat exchange particles is enclosed within the jacketed heat exchanger 12 containing the cooling medium, ensuring sufficient heat exchange area and high heat exchange efficiency during heat exchange.

[0062] In addition to the jacketed heat exchanger 12 provided in this embodiment for cooling the heat exchange particles, in other embodiments, heat exchange with the heat exchange particles in the storage bin 11 can be achieved by wrapping a cooling pipe with condensate flowing inside around the outside of the storage bin 11. In this case, the cooling pipe replaces the jacketed heat exchanger 12. In addition, in other embodiments, liquid nitrogen can be transported using the inner jacketed heat exchanger 12, and the heat exchange particles can be cooled by the vaporization of the liquid nitrogen. Then, the vaporized gas is discharged through a gas-liquid separator.

[0063] Optionally, the storage bin 11 is vertically positioned with a height-to-diameter ratio of A, satisfying 5 ≤ A ≤ 7. By optimizing the height-to-diameter ratio A of the storage bin 11 within the above range, a larger height-to-diameter ratio is ensured, which helps the cooling particles to exchange heat more effectively and evenly during the descent process, ensuring that most of the heat of the cooling particles remaining within the specified time is carried away.

[0064] Optionally, the feed inlet is located at the top of the storage silo 11, and the discharge outlet is located at the bottom of the storage silo 11. The jacketed heat exchanger 12 is provided with a cooling medium inlet 121 and a cooling medium outlet 122. The cooling medium inlet 121 is located at the bottom of the jacketed heat exchanger 12, and the cooling medium outlet 122 is located at the top of the jacketed heat exchanger 12. By setting the feed inlet of the storage silo 11 at the top and the discharge outlet at the bottom, the flow direction of the heat exchange particles is from top to bottom. However, by setting the cooling medium inlet 121 at the bottom and the cooling medium outlet 122 at the top of the jacketed heat exchanger 12, the flow direction of the cooling medium is from bottom to top. The flow direction of the cooling medium is exactly opposite to the flow direction of the heat exchange particles, thereby improving the heat exchange effect.

[0065] Optionally, the storage silo 11 includes a silo body and a silo cover. The silo cover is placed on the silo body to seal it. The silo cover is made of a transparent material. The transparent material allows for easy monitoring of the accumulation of heat exchange particles within the storage silo 11, facilitating the replenishment of heat exchange particles as needed. It is understood that the silo cover has holes for the heat exchange particle transmission channel to pass through, allowing the storage silo 11 to receive heat exchange particles from the solid-gas separation component.

[0066] The material used to manufacture the hopper cover can be freely selected according to requirements, mainly needing to meet the characteristics of transparency and high temperature resistance. In this embodiment, the hopper cover is made of engineering plastic material, which has the characteristics of high temperature resistance and transparency, such as polyaryletherketone (PAEK) or polyetheretherketone (PEEK). In other embodiments, the hopper cover can also be made of glass material with high temperature resistance.

[0067] Optionally, the lower part of the storage bin 11 is inverted conical. By making the lower part of the storage bin 11 conical, the heat exchange particle flow rate in the central region of the storage bin 11 is faster than that in the peripheral region, which helps the cooling particles to exchange heat more effectively and evenly during the descent process, ensuring that most of the heat of the cooling particles that remain in the storage bin 11 within a specified time is carried away.

[0068] Optionally, the heat exchange module 21 includes multiple heat exchange tubes 211 arranged in parallel and heat exchange fins 212 connected to both sides of the heat exchange tubes 211. By connecting heat exchange fins 212 to both sides of each heat exchange tube 211, the heat exchange area of ​​the heat exchange module 21 is increased, the heat exchange efficiency is improved, the cooling rate of the graphitization kiln is accelerated, the cooling cycle is shortened, and the multiple heat exchange tubes 211 are connected in parallel, so that each heat exchange tube 211 can perform heat exchange independently, improving the uniformity of heat exchange. In addition, the independent heat exchange of each heat exchange tube 211 means that even if a blockage occurs inside one heat exchange tube 211, the other heat exchange tubes 211 can still perform cooling operations normally.

[0069] In this embodiment, the heat exchange tubes 211 and heat exchange fins 212 are connected by welding. This ensures that the heat exchange fins 212 fix the heat exchange tubes 211 and prevents the heat exchange tubes 211 from bending under thermal stress. To ensure a balanced flow rate of heat exchange particles within each heat exchange tube 211, a solid flow meter is installed at the heat exchange outlet of each heat exchange tube 211 to monitor the flow rate of heat exchange particles within the tubes. The number of heat exchange tubes 211 can be freely set according to the required heat exchange area.

[0070] Optionally, the heat exchange assembly 2 includes a flexible pipe 22, which is connected to both the heat exchange inlet and outlet of the heat exchange module 21. The flexible pipe 22 connects to both the heat exchange inlet and outlet of the heat exchange module 21, allowing the flexible pipe 22 to adapt and avoid damage at the connection points during movement, compared to a rigid connection. In this embodiment, the flexible pipe 22 is a corrugated hose, which not only has a certain degree of flexibility but also high heat resistance, with a maximum operating temperature of 650℃-950℃, thereby further reducing the impact of high temperatures on the flexible pipe 22. Optionally, the corrugated hose can be a corrugated hose made of metal, non-metal, or composite materials as described in the prior art; this invention is not limited to any particular type.

[0071] Optionally, the heat exchange assembly 2 includes an elbow 23. Both the heat exchange inlet and outlet of the heat exchange module 21 are connected to the elbow 23. One end of the elbow 23 is connected to the heat exchange module 21, and the other end extends away from the graphitization kiln and is connected to a flexible pipe 22. By connecting the flexible pipe 22 to the other end of the elbow 23 extending away from the graphitization kiln, the distance between the flexible pipe 22 and the graphitization kiln is increased, reducing the thermal impact of the high temperature of the graphitization kiln on the flexible pipe 22. In this embodiment, the elbow 23 is a 90° elbow.

[0072] Optionally, the heat exchange module 21 can be moved to contact the top of the graphitization kiln. Since the insulation layer 100 of the graphitization kiln is mainly located at the top of the kiln, moving the heat exchange module 21 to contact the top of the kiln is beneficial for cooling the insulation layer 100 located at the top of the kiln.

[0073] Optionally, the heat exchange module 21 further includes at least one movable connection structure disposed on the heat exchange fins 212, and the movable connection structure includes a lifting lug 213. The enhanced cooling device for the graphitization kiln also includes a gantry crane. In this embodiment, the gantry crane is connected to the lifting lug 213 and is used to move the heat exchange module 21. By providing the lifting lug 213 on the heat exchange fins 212, it is convenient to connect the gantry crane used to move the heat exchange module 21 to the heat exchange module 21.

[0074] In this embodiment, the overhead crane includes a traveling device that moves along a track on the top of the workshop, and an electric hoist connected below the traveling device for lifting. The hook on the electric hoist is connected to the lifting lug 213. When it is necessary to move the heat exchange module 21, the traveling device is first started to move it directly above the heat exchange module 21. Then the electric hoist is started to lower the hook. The hook is then connected to the lifting lug 213. The electric hoist is started again to lift the heat exchange module 21. The traveling device is then started to move the heat exchange module 21. Once it reaches the desired position, the electric hoist is used to lower the heat exchange module 21 and separate the hook from the lifting lug 213, thus achieving the position adjustment of the heat exchange module 21.

[0075] In other embodiments, in addition to providing lifting lugs 213 on the heat exchange fins 212, threaded holes can also be opened on the heat exchange fins 212, and lifting rings can be threaded into the threaded holes, so that the lifting rings can be connected to the heat exchange fins 212 when lifting is required, and the lifting rings can be disassembled when lifting is not required. When connecting the lifting rings and the electric hoist, the two can be connected by slings.

[0076] Optionally, multiple temperature sensors 214 are connected to the heat exchange fins 212 and protrude from the heat exchange module 21 towards the side closer to the graphitization kiln. Each temperature sensor 214 has multiple temperature measuring points at different distances from the heat exchange module 21, such as reference points. Figure 7 As shown, the distances of the three temperature measuring points from the heat exchange module 21 (specifically, the heat exchange fins 212) are 50mm, 100mm, and 150mm, respectively. In other embodiments, the number and position of the temperature measuring points can be adjusted as needed. By setting the temperature sensor 214, the temperature of the insulation layer 100 on the top of the graphitization kiln is detected. When the temperature cools down to the specified temperature, the position of the heat exchange module 21 is adjusted using a gantry crane to continue the cooling operation until the insulation layer 100 on the top of the graphitization kiln has cooled down to the specified temperature. In addition, by setting multiple temperature measuring points at different distances, the accuracy of the temperature measurement is ensured.

[0077] In this embodiment, the temperature sensor 214 used to detect the temperature of the insulation layer 100 is a thermocouple. The side of the thermocouple inserted into the insulation layer 100 is tapered to facilitate insertion. In order to facilitate the connection between the temperature sensor 214 and the heat exchange fin 212, the heat exchange fin 212 is provided with a threaded through hole, and the temperature sensor 214 is provided with an external thread that is threaded to the threaded through hole. By inserting the temperature sensor 214 into the threaded through hole of the heat exchange fin 212, the connection and fixation between the temperature sensor 214 and the heat exchange fin 212 can be achieved by screwing the temperature sensor 214.

[0078] Optionally, the enhanced cooling device for the graphitization kiln also includes a distributor 5 and a confluencer 6. The distributor 5 and the confluencer 6 each include a variable diameter body 51, a main interface 52, and multiple branch interfaces 53. The variable diameter body 51 has a larger diameter end and a smaller diameter end. The main interface 52 is located at the smaller diameter end, and the multiple branch interfaces 53 are located at the larger diameter end. One end of the multiple heat exchange tubes 211 of the heat exchange module 21 is connected to the multiple branch interfaces 53 of the distributor 5 through flexible pipes 22. The other end of the multiple heat exchange tubes 211 of the heat exchange module 21 is connected to the multiple branch interfaces 53 of the confluencer 6 through flexible pipes 22. The main interface 52 of the distributor 5 leads to the air supply component 3, and the main interface 52 of the confluencer 6 leads to the solid-gas separation component.

[0079] By setting up the distributor 5, the heat exchange particles carried out by the gas from the storage bin 11 can be evenly distributed into each heat exchange tube 211, preventing uneven distribution of heat exchange particles in the heat exchange tube 211 and causing local overheating hazards. By setting up the collector 6, the heat exchange particles in multiple heat exchange tubes 211 can be collected. In addition, since both the collector 6 and the distributor 5 are composed of a variable diameter body 51, a main interface 52 and multiple branch interfaces 53, the variable diameter body 51 can be used to increase the speed and accelerate the circulation flow rate.

[0080] In this embodiment, the distributor 5 is arranged perpendicular to the ground to facilitate the flow of cooling particles, and the main air duct interface is set at the top of the distributor 5 so that the gas is blown in from top to bottom, avoiding the accumulation of cooling particles at the junction of the main interface 52 and multiple branch interfaces 53 of the distributor 5.

[0081] Optionally, the variable diameter body 51 is conical in shape, and the inclination angle of the wall of the variable diameter body 51 is θ, satisfying 20°≤θ≤30°. By limiting the inclination angle θ of the wall of the variable diameter body 51 to satisfy 20°≤θ≤30°, it is possible to avoid the inclination angle θ being too small, which would prevent it from accelerating the flow rate, and to avoid the inclination angle θ being too large, which would easily cause blockage.

[0082] The inclination angle θ of the wall of the variable diameter body 51 can be any value between 20° and 30° or any range between two values, such as 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, etc.

[0083] Optionally, the air supply assembly 3 includes an air supply module 31 and a J-shaped valve 32. The air supply module 31 is used to supply airflow to the J-shaped valve 32. The J-shaped valve 32 includes a descending section 321, a horizontal section 322, and an ascending section 323 connected in sequence. The top of the descending section 321 of the J-shaped valve 32 is provided with a heat exchange particle inlet, which is connected to the outlet of the storage module. The end of the ascending section 323 is connected with a heat exchange particle outlet. The lower part of the descending section 321 is provided with a loosening air interface 324. The horizontal section 322 is provided with a fluidizing air interface 325, which is provided corresponding to the ascending section 323. The heat exchange particle outlet is also provided with a main air inlet 326.

[0084] By setting a loosening air interface 324 and a fluidizing air interface 325 on the J-shaped valve 32, the circulation rate of the heat exchange particles is precisely controlled by the loosening air and the fluidizing air, ensuring the uniform flow of the heat exchange particles.

[0085] In this embodiment, the J-shaped valve 32 is a J-valve return feeder used in conjunction with the cyclone separator 4. Its main principle is to overcome the positive pressure in the furnace by establishing a material level difference. The power for material return comes from the material level difference established in the riser. Through the different air distribution of the rising section 323 and the falling section 321 of the return feeder, the rising section 323 and the falling section 321 exhibit different fluidization, which is beneficial to the working stability during the conveying process.

[0086] In this embodiment, the enhanced cooling device for the graphitization kiln also includes an ascending pipe 7 and a descending pipe 8. One end of the ascending pipe 7 is connected to the main interface 52 of the manifold 6, and the other end is connected to the inlet of the solid-gas separator. One end of the descending pipe 8 is connected to the feed inlet of the storage silo 11, and the other end is connected to the heat exchange particle inlet at the top of the descending section 321 of the J-type valve.

[0087] Optionally, a gate valve 33 is also provided between the heat exchange particle inlet and the discharge port of the storage module. The purpose of setting the gate valve 33 is to allow the heat exchange particles to remain in the storage silo 11 for a period of time, approximately 1 to 5 minutes, thereby ensuring sufficient heat exchange between the heat exchange particles and the cooling medium. In addition, the pipe section between the storage silo 11 and the gate valve 33 is made of transparent plexiglass, and a graduated scale is arranged on this pipe section. By adopting this technical solution, during the circulation of heat exchange particles, the accumulated heat exchange particles in the pipe section gradually move downwards. The flow rate of the heat exchange particles in the pipe is calibrated by measuring the time it takes for them to move downwards at a fixed distance, thereby controlling the opening of the gate valve 33 and regulating the heat exchange effect. Furthermore, the J-shaped valve 32 and the gate valve 33 cooperate with each other, utilizing the heat exchange particles accumulated at the J-shaped valve 32 to share part of the pressure when the gate valve 33 is opening and closing, preventing the gate valve 33 from failing under high pressure and extending its service life.

[0088] Optionally, the horizontal section 322 of the J-shaped valve 32 is also provided with a discharge port 327. By providing a discharge port 327 for discharging heat exchange particles, it is convenient to clean the heat exchange particles after shutdown.

[0089] Optionally, the air supply module 31 includes an air source 311, an air supply main pipe 312 connected to the air source 311, and an air supply main pipe 313, a loosening air branch pipe 314, and a fluidizing air branch pipe 315 disposed on the air supply main pipe 312. The air source 311 includes a fan. The air supply main pipe 313 is connected to the main air inlet 326. The loosening air branch pipe 314 is connected to the loosening air interface 324. The fluidizing air branch pipe 315 is connected to the fluidizing air interface 325. By setting the air supply main pipe 313 connected to the main air inlet 326 of the J-shaped valve 32, the loosening air branch pipe 314 connected to the loosening air interface 324, and the fluidizing air branch pipe 315 connected to the fluidizing air interface 325 on the air supply main pipe 312 connected to the fan, the airflow delivered by the fan into the air supply main pipe 312 is diverted, so that by changing the different positions of entry into the J-shaped valve 32, it achieves its respective effect and function.

[0090] In this embodiment, the gas provided by the gas source 311 is an inert gas, such as helium or nitrogen. In other embodiments, the gas provided by the gas source 311 can be selected as needed, for example, it can also be air.

[0091] Optionally, the solid-gas separation component includes a cyclone separator 4. By employing a cyclone separator 4, a device used for separating gas-solid or liquid-solid systems, the cyclone separator 4 can effectively separate the heat exchange particles before the gas-solid fluid mixture of heat exchange particles and airflow enters the storage silo 11, thus preventing the heat exchange particles entering the storage silo 11 from being mixed with excess gas.

[0092] In this embodiment, the cyclone separator 4 works by using the rotational motion caused by the tangential introduction of airflow, which throws solid particles or liquid droplets with large inertial centrifugal force toward the outer wall surface for separation. The main features of the cyclone separator 4 are its simple structure, high operational flexibility, high efficiency, convenient management and maintenance, and low price. It is a widely used separation device in industry, and will not be elaborated further here.

[0093] When using an enhanced cooling device for graphitization kilns to cool the kiln, the heat exchange module 21 is first placed on top of the kiln using a gantry crane. Then, the gate valve 33 and the air supply module 311 are opened, allowing the heat exchange particles in the storage silo 11 to pass sequentially through the downcomer 8, J-valve 32, and distributor 5 before entering the heat exchange tubes 211 within the heat exchange module 21. The heat exchange particles in the heat exchange tubes 211 then exchange heat with the insulation layer 100 at the top of the kiln. After heat exchange, the particles continue to move forward through the heat exchange tubes 211, sequentially... After passing through the manifold 6 and riser 7, the particles enter the solid-gas separation component for solid-gas separation. The separated heat exchange particles flow back to the storage silo 11 and exchange heat with the cooling medium in the jacketed heat exchanger 12. After cooling, the heat exchange particles continue to circulate until the insulation layer 100 of the graphitization kiln cools to the required temperature. At the same time, the cooling medium, after cooling the heat exchange particles, is heated and vaporized to form high-temperature steam. This high-temperature steam is then input into equipment that uses high-temperature steam as an energy source for power supply. This achieves both accelerated cooling of the graphitization kiln and improved resource utilization through heat recovery. When the heat exchange module 21 is used to cool the top of the graphitization kiln, the temperature sensor 214 continuously monitors the temperature of the kiln. When the area reaches the cooling temperature, material can be sucked into that area. Simultaneously, the position of the heat exchange module 21 is moved by the overhead crane to continue cooling another area, thus achieving simultaneous cooling and material suction, greatly shortening the operation cycle and improving production efficiency.

[0094] In this embodiment, a waste heat recovery system is also provided, which recovers waste heat by utilizing the heat from the cooling module of the storage cooling assembly 1. This waste heat recovery system recovers energy by using the cooling module of the storage cooling assembly 1 to cool the heat exchange particles, and then uses the recovered heat to power other equipment, thereby reducing resource waste and improving energy efficiency.

[0095] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An enhanced cooling device for graphitization kilns, characterized in that, It includes a storage cooling assembly (1), a heat exchange assembly (2), an air supply assembly (3), and a solid-gas separation assembly, wherein: The storage and cooling assembly (1) includes a storage module and a cooling module. The storage module is used to store and supply heat exchange particles and is provided with an inlet and an outlet. The cooling module is used to cool the heat exchange particles. The heat exchange assembly (2) includes a movable heat exchange module (21), which can be close to and away from the graphitization kiln. The heat exchange module (21) is provided with a heat exchange channel, which is provided with a heat exchange inlet and a heat exchange outlet. The air supply component (3) is disposed between the discharge port and the heat exchange inlet. The air supply component (3) is used to receive the heat exchange particles in the storage module and can generate airflow to drive the heat exchange particles to form a gas-solid fluid flow through the heat exchange module (21). The solid-gas separation component is disposed between the heat exchange outlet and the feed inlet to separate the heat exchange particles in the gas-solid fluid so that the heat exchange particles enter the storage module.

2. The enhanced cooling device for graphitization kilns according to claim 1, characterized in that, The storage module includes a storage bin (11), and the cooling module includes a jacketed heat exchanger (12) disposed outside the storage bin (11).

3. The enhanced cooling device for graphitization kilns according to claim 2, characterized in that, The storage cooling assembly (1) includes at least one of the following conditions: I. The storage bin (11) is vertically positioned with a height-to-diameter ratio of A, and satisfies 5≤A≤7; II. The feed inlet is located at the top of the storage silo (11), the discharge outlet is located at the bottom of the storage silo (11), and the jacketed heat exchanger (12) is provided with a cooling medium inlet (121) and a cooling medium outlet (122). The cooling medium inlet (121) is located at the bottom of the jacketed heat exchanger (12), and the cooling medium outlet (122) is located at the top of the jacketed heat exchanger (12). III. The storage bin (11) includes a bin body and a bin cover plate. The bin cover plate is placed on the bin body to close the bin body. The bin cover plate is made of transparent material. IV. The lower part of the storage bin (11) is in the shape of an inverted cone.

4. The enhanced cooling device for graphitization kilns according to claim 1, characterized in that, The heat exchange assembly (2) includes at least one of the following features: I. The heat exchange module (21) includes a plurality of heat exchange tubes (211) arranged in parallel and heat exchange fins (212) connected to both sides of the heat exchange tubes (211). II. The heat exchange assembly (2) includes a flexible pipe (22), and the heat exchange inlet and the heat exchange outlet of the heat exchange module (21) are both connected to the flexible pipe (22). III. The heat exchange component (2) includes an elbow (23). The heat exchange inlet and the heat exchange outlet of the heat exchange module (21) are both connected to the elbow (23). One end of the elbow (23) is connected to the heat exchange module (21), and the other end extends away from the graphitization kiln and is connected to the flexible pipe (22). IV. The heat exchange module (21) can be moved to contact the top of the graphitization furnace.

5. The enhanced cooling device for graphitization kilns according to claim 4, characterized in that, The heat exchange assembly (2) includes at least one of the following conditions: I. The heat exchange module (21) further includes at least one movable connection structure, which is disposed on the heat exchange fins (212). The movable connection structure includes a lifting lug (213). The enhanced cooling device for graphitization kiln further includes a gantry crane, which is connected to the lifting lug (213) and is used to drive the heat exchange module (21) to move. II. The heat exchange module (21) further includes multiple temperature sensors (214), which are connected to the heat exchange fins (212) and protrude from the heat exchange module (21) towards the side closer to the graphitization kiln. Each temperature sensor (214) has multiple temperature measuring points at different distances from the heat exchange module (21). III. The enhanced cooling device for the graphitization kiln further includes a distributor (5) and a confluencer (6). The distributor (5) and the confluencer (6) each include a variable diameter body (51), a main interface (52), and multiple branch interfaces (53). The variable diameter body (51) has a larger diameter end and a smaller diameter end. The main interface (52) is located at the smaller diameter end, and the multiple branch interfaces (53) are located at the larger diameter end. The heat exchange module (21) has multiple heat exchange tubes ( One end of the heat exchange tube (211) is connected to one of the multiple branch interfaces (53) of the splitter (5) through the flexible pipe (22), and the other end of the multiple heat exchange tubes (211) of the heat exchange module (21) is connected to one of the multiple branch interfaces (53) of the manifold (6) through the flexible pipe (22). The main interface (52) of the splitter (5) leads to the air supply assembly (3), and the main interface (52) of the manifold (6) leads to the solid-gas separation assembly.

6. The enhanced cooling device for a graphitization kiln according to claim 5, characterized in that, The variable diameter body (51) is conical in shape, and the inclination angle of the wall of the variable diameter body (51) is θ, which satisfies 20°≤θ≤30°.

7. The enhanced cooling device for graphitization kilns according to claim 1, characterized in that, The air supply assembly (3) includes an air supply module (31) and a J-shaped valve (32). The air supply module (31) is used to supply airflow to the J-shaped valve (32). The J-shaped valve (32) includes a descending section (321), a horizontal section (322), and an ascending section (323) connected in sequence. The top of the descending section (321) of the J-shaped valve (32) is provided with a heat exchange particle inlet, which is connected to the outlet of the storage module. The end of the ascending section (323) is connected with a heat exchange particle outlet. The lower part of the descending section (321) is provided with a loosening air interface (324). The horizontal section (322) is provided with a fluidizing air interface (325), which is set corresponding to the ascending section (323). The heat exchange particle outlet is also provided with a main air inlet (326).

8. The enhanced cooling device for graphitization kilns according to claim 7, characterized in that, The air supply assembly (3) includes at least one of the following conditions: I. A gate valve (33) is also provided between the heat exchange particle inlet and the material outlet of the storage module. II. The horizontal section (322) of the J-shaped valve (32) is also provided with a discharge port (327); III. The gas supply module (31) includes a gas source (311), a main air supply pipe (312) connected to the gas source (311), and a main air supply pipe (313), a loosening air branch pipe (314), and a fluidizing air branch pipe (315) disposed on the main air supply pipe (312); the gas source (311) includes a fan, the main air supply pipe (313) is connected to the main air inlet (326), the loosening air branch pipe (314) is connected to the loosening air interface (324), and the fluidizing air branch pipe (315) is connected to the fluidizing air interface (325).

9. The enhanced cooling device for graphitization kilns according to claim 1, characterized in that, The solid-gas separation assembly includes a cyclone separator (4).

10. A waste heat recovery system, characterized in that, Including the enhanced cooling device for graphitization kilns as described in any one of claims 1-9, which recovers waste heat by utilizing the heat from the cooling module of the storage cooling assembly (1).

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