Graphitization kiln intensified cooling method, graphitization kiln intensified cooling device and waste heat recovery system

Abstract

This invention belongs to the field of graphite material production technology and discloses a method, device, and waste heat recovery system for enhanced cooling of graphitization kilns. The enhanced cooling method involves: Step S1, supplying heat transfer oil to the circulation pipeline via a supply component, controlling the oil to circulate between the heat exchange module and the cooling component; Step S2, moving the heat exchange module to contact the area to be cooled within the graphitization kiln; and Step S3, controlling the residence time of the heat transfer oil within the heat exchange module to raise its temperature to a first temperature upon exiting the module, thereby accelerating the cooling rate of the graphitization kiln. Step S4, after cooling the current area, adjusting the position of the heat exchange module to continue cooling the next area. Furthermore, after each adjustment of the heat exchange module position, material is simultaneously sucked up from the already cooled area, achieving simultaneous cooling and material suction, thus improving production efficiency.

Description

Technical Field

[0001] This invention relates to the field of graphite material production technology, and in particular to a method for enhanced cooling of a graphitization kiln, a device for enhanced cooling of a graphitization kiln, and a waste heat recovery system. 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 this, the present invention is hereby proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a method for enhanced cooling of graphitization kilns, an enhanced cooling device for graphitization kilns, and a waste heat recovery system, which have 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 one hand, the present invention provides a method for enhanced cooling of a graphitization kiln, using a graphitization kiln enhanced cooling device. The device includes a circulation pipeline for the flow of heat transfer oil, a heat exchange component and a cooling component disposed on the circulation pipeline, and a supply component connected to the circulation pipeline. The heat exchange component includes a movable heat exchange module that can approach and move away from the graphitization kiln. The heat exchange component is used to cool the heat transfer oil through heat exchange. The supply component is used to supply the heat transfer oil. The method for enhanced cooling of a graphitization kiln includes the following steps:

[0008] S1. The heat transfer oil is supplied to the circulation pipeline through the supply component, and the heat transfer oil is controlled to circulate between the heat exchange module and the cooling component along the circulation pipeline.

[0009] S2. Move the heat exchange module to contact the area to be cooled in the graphitization kiln;

[0010] S3. Control the residence time of the heat transfer oil in the heat exchange module so that the temperature of the heat transfer oil flowing out of the heat exchange module rises to a first temperature, the first temperature being compatible with the working temperature of the heat transfer oil.

[0011] S4. After completing the cooling operation of the current area, adjust the position of the heat exchange module and continue the cooling operation of the next area to be cooled until the cooling operation of the entire area of ​​the graphitization kiln is completed. After each adjustment of the position of the heat exchange module, the material suction operation is performed on the area that has been cooled.

[0012] Optionally, the supply assembly includes an oil boiling and storage tank, a first power pump, and a second power pump, wherein the oil boiling and storage tank is used for the storage and processing of the heat transfer oil;

[0013] Step S1 also includes the following steps:

[0014] S11. The oil boiling and storage tank is provided with a supply pipe, the cooling component is provided with a medium inlet and a medium outlet, the heat exchange module is provided with a heat exchange outlet and a heat exchange inlet, the supply pipe is connected to the circulation pipeline between the medium outlet and the heat exchange inlet, and the first power pump is connected to the circulation pipeline between the medium outlet and the heat exchange inlet. When the first power pump is started, the heat transfer oil in the oil boiling and storage tank is transported to the circulation pipeline through the supply pipe, and the heat transfer oil enters the heat exchange module to cool the graphitization kiln.

[0015] S12. The second power pump is connected to the circulation pipeline between the heat exchange outlet and the medium inlet. The second power pump is used to transport the heat transfer oil flowing out of the heat exchange outlet to the cooling assembly. The cooling assembly is used to cool the heat transfer oil.

[0016] S13. The first power pump delivers the heat transfer oil in the oil storage tank to the circulation pipeline. After replenishing the cooled heat transfer oil flowing out of the medium outlet of the cooling component, it re-enters the heat exchange module to continue cooling the graphitization kiln, and the cycle repeats.

[0017] Optionally, the supply assembly includes an oil boiling and storage tank, a first power pump, a second power pump, and a one-way valve, wherein the oil boiling and storage tank is used for the storage and processing of the heat transfer oil;

[0018] Step S1 also includes the following steps:

[0019] S11. The oil boiling and storage tank is provided with a supply pipe, the cooling assembly is provided with a medium inlet and a medium outlet, the heat exchange module is provided with a heat exchange outlet and a heat exchange inlet, the supply pipe is provided on the circulation pipeline connected between the heat exchange outlet and the medium inlet, and the supply pipe is also provided with a one-way valve located between the oil boiling and storage tank and the circulation pipeline, the second power pump is connected on the circulation pipeline between the heat exchange outlet and the medium inlet, the second power pump is started to transport the heat transfer oil in the oil boiling and storage tank to the circulation pipeline through the supply pipe, and transport the heat transfer oil to the cooling assembly, the cooling assembly is used to cool the heat transfer oil;

[0020] S12. The oil boiling and storage tank is equipped with a return pipe, which is connected to the circulation pipeline between the medium outlet and the heat exchange inlet. The first power pump is connected between the return pipe and the circulation pipeline. After the heat transfer oil that has been cooled in the cooling assembly flows out of the medium outlet, it is divided into two paths. One part continues to flow along the circulation pipeline and enters the heat exchange module to cool the graphitization kiln. The other part, under the action of the first power pump, enters the oil boiling and storage tank through the return pipe for oil boiling treatment to remove moisture and gas impurities. The treated heat transfer oil is then transported to the circulation pipeline through the supply pipeline under the operation of the second power pump to merge with the heat transfer oil flowing out of the heat exchange module.

[0021] S13. The second power pump delivers the heat transfer oil that has completed the confluence to the cooling component for cooling, and repeats the cycle.

[0022] Optionally, the oil heating and storage tank includes an oil heater, an oil storage tank, and an expansion tank structure. The oil storage tank is used to store the heat transfer oil. The oil heater is located inside the oil storage tank and is used to heat the heat transfer oil. The expansion tank is used to release the pressure of the heat transfer oil when it is at a high temperature after heat treatment and undergoes thermal expansion. A preliminary step S0 is provided before step S1. The preliminary step S0 includes the following steps:

[0023] S01. Start the oil heating device to heat the heat transfer oil in the oil storage tank and perform the oil heating operation.

[0024] S02. After the oil boiling operation is completed, let it stand and cool so that the temperature of the heat transfer oil in the oil storage tank drops to a second temperature, which is less than or equal to 100°C.

[0025] S03. The cooled heat transfer oil is transported into the system for cold oil trial circulation.

[0026] S04. Detect the inlet and outlet pressures and differential pressures of the cooling component and the heat exchange module, as well as the liquid level of the expansion tank, to ensure that the heat transfer oil can circulate continuously.

[0027] Optionally, step S4 further includes the following steps:

[0028] S41. The heat exchange module is provided with a temperature sensor for detecting the temperature of the graphitization kiln, and the temperature sensor is used to detect the area of ​​the graphitization kiln currently in contact with the heat exchange module.

[0029] S42. After the area of ​​the graphitization kiln in contact with the heat exchange module is cooled to the required temperature, the heat exchange module is moved using a hoisting device to cool another area of ​​the graphitization kiln that needs to be cooled, and the material is sucked up from the previous area. The above steps are repeated until the cooling operation of the entire area of ​​the graphitization kiln is completed.

[0030] Optionally, in step S41, when the temperature is detected using the temperature sensor, the temperature sensor needs to detect three temperature measurement points, and the distances of the three temperature measurement points from the heat exchange module are 50mm, 100mm, and 150mm, respectively.

[0031] Optionally, in step S3, the time for the heat transfer oil to cool in the cooling assembly is T, and it satisfies 1min≤T≤5min.

[0032] On the other hand, a graphitization kiln enhanced cooling device is provided, wherein the graphitization kiln enhanced cooling device applies the graphitization kiln enhanced cooling method as described in any of the preceding claims to cool the graphitization kiln, and the graphitization kiln enhanced cooling device includes the heat exchange module, the supply component, and the cooling component.

[0033] Optionally, the heat exchange module includes multiple heat exchange tubes arranged side by side and heat exchange fins connected to both sides of the heat exchange tubes; the multiple heat exchange tubes are connected in parallel to the circulation pipeline, or the multiple heat exchange tubes are connected in series in a serpentine manner to the circulation pipeline.

[0034] Optionally, the heat exchange assembly includes a flexible pipe, and the heat exchange pipe is provided with a heat exchange inlet and a heat exchange outlet, both of which are connected to the flexible pipe.

[0035] 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.

[0036] Optionally, the heat exchange module can be moved to contact the top of the graphitization kiln.

[0037] Optionally, the circulation pipeline includes an ascending pipe, a descending pipe, and two reducing pipes. Each reducing pipe has a larger diameter end and a smaller diameter end. The inlet and outlet of the ascending pipe are respectively connected to the smaller diameter ends of the two reducing pipes. The reducing pipe connected to the inlet of the ascending pipe has its larger diameter end leading to the heat exchange module. The reducing pipe connected to the outlet of the ascending pipe has its larger diameter end leading to the cooling assembly. The descending pipe connects the heat exchange module and the medium outlet of the cooling assembly.

[0038] Optionally, the reducing tube is conical, and the inclination angle of the reducing tube wall is θ, satisfying 20°≤θ≤30°.

[0039] Optionally, the coil-type heat exchanger includes a heat exchange coil and a cooling chamber. The heat exchange coil is located inside the cooling chamber. The heat transfer oil flows inside the heat exchange coil, and the heat exchange coil has a medium inlet and a medium outlet. The cooling chamber is used to cool the heat transfer oil.

[0040] Optionally, the radius of the heat exchange coil is R1, and the radius of the cooling chamber is R, and R1≥2R / 3 is satisfied.

[0041] Optionally, the bending angle of the heat exchange coil is no greater than 15°.

[0042] Optionally, the medium inlet is located at the top of the heat exchange coil, the medium outlet is located at the bottom of the heat exchange coil, and the cooling chamber is provided with a cooling medium inlet and a cooling medium outlet, the cooling medium inlet being located at the bottom of the cooling chamber and the cooling medium outlet being located at the top of the cooling chamber.

[0043] In another aspect, a waste heat recovery system is also provided, including a graphitization kiln enhanced cooling device as described in any of the preceding claims or applied to the method described in any of the preceding claims, wherein the waste heat recovery system recovers waste heat by utilizing the heat absorbed by the cooling components of the graphitization kiln enhanced cooling device.

[0044] The beneficial effects of this invention are:

[0045] This invention provides a method for enhanced cooling of a graphitization kiln. The method comprises the following steps: S1: supplying heat transfer oil to a circulation pipeline via a supply component, controlling the heat transfer oil to circulate between a heat exchange module and a cooling component; S2: moving the heat exchange module to contact the area of ​​the graphitization kiln to be cooled; and S3: controlling the residence time of the heat transfer oil in the heat exchange module to raise the temperature of the oil exiting the module to a first temperature, which is compatible with the working temperature of the heat transfer oil, thereby facilitating heat exchange with the graphitization kiln and accelerating the cooling rate of the kiln, significantly shortening the cooling cycle; and S4: after completing the cooling operation of the current area, adjusting the position of the heat exchange module to proceed to the next area to be cooled. The cooling process continues until the entire graphitization kiln is cooled. Each time the heat exchange module is repositioned, material is simultaneously sucked up from the cooled areas. This not only avoids interference from the heat exchange module in subsequent processes within the graphitization kiln, reducing implementation difficulty, but more importantly, it allows for simultaneous cooling and material suction by moving the heat exchange module to the cooled areas. This significantly shortens the production cycle and improves efficiency. Furthermore, the heat transfer oil that has exchanged heat with the graphitization kiln is returned to the coil heat exchanger for further cooling. Additionally, the heat absorbed by the coil heat exchanger can be recovered to power other equipment, reducing resource waste and improving energy efficiency.

[0046] This invention provides an enhanced cooling device for graphitization kilns. This enhanced cooling device cools the graphitization kiln by using an enhanced cooling method, which not only accelerates the cooling rate but also achieves simultaneous cooling and material intake, greatly shortening the production cycle and improving production efficiency. Furthermore, it utilizes a coil heat exchanger to recover heat by cooling the heat transfer oil, thereby reducing resource waste and improving energy utilization.

[0047] The present invention also provides a waste heat recovery system, which utilizes the coil heat exchanger of the graphitization kiln enhanced cooling device to recover heat from the heat transfer oil, and can use the recovered heat to power other equipment, thereby reducing resource waste and improving energy utilization. Attached Figure Description

[0048] Figure 1 This is a flowchart of the enhanced cooling method for graphitization kilns provided by the present invention;

[0049] Figure 2 This is a structural assembly diagram of the graphitization kiln enhanced cooling device provided by the present invention;

[0050] Figure 3 This is a schematic diagram of the working mode of the graphitization kiln enhanced cooling device with oil replenishment function provided by the present invention.

[0051] Figure 4 This is a schematic diagram of the working mode of the graphitization kiln enhanced cooling device with controlled moisture content provided by the present invention.

[0052] Figure 5 This is a schematic diagram of the heat exchange module in the graphitization kiln enhanced cooling device provided by the present invention.

[0053] Figure 6 This is a schematic diagram of the structure of the temperature sensor in the graphitization kiln enhanced cooling device provided by the present invention when measuring the temperature of the insulation layer.

[0054] Figure 7 This is a plan view of the variable diameter pipe in the graphitization kiln enhanced cooling device provided by the present invention.

[0055] In the picture:

[0056] 100. Insulation layer;

[0057] 1. Heat exchange assembly; 11. Heat exchange module; 111. Heat exchange tube; 112. Heat exchange fins; 113. Lifting lug; 12. Flexible pipe; 13. Elbow; 14. Temperature sensor;

[0058] 2. Coil-type heat exchanger; 21. Heat exchange coil; 22. Cooling chamber; 221. Cooling medium inlet; 222. Cooling medium outlet;

[0059] 3. Supply components; 31. Oil storage tank; 32. First power pump; 33. Second power pump; 34. Check valve; 35. Return pipeline; 36. Supply pipeline;

[0060] 4. Ascending pipe;

[0061] 5. Downcomer;

[0062] 6. Reducing pipe. Detailed Implementation

[0063] 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 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, and not all of the structures.

[0064] In the description of this invention, 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 invention based on the specific circumstances.

[0065] 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.

[0066] 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0067] 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.

[0068] 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.

[0069] 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 the ease of implementation, this embodiment provides a method for enhanced cooling of a graphitization kiln, using a graphitization kiln cooling device. The graphitization kiln cooling device includes a circulation pipeline for the flow of heat transfer oil, a heat exchange component 1 and a cooling component disposed on the circulation pipeline, and a supply component 3 connected to the circulation pipeline. The heat exchange component 1 includes a movable heat exchange module 11, which can be close to and away from the graphitization kiln. The heat exchange component 1 is used to cool the heat transfer oil through heat exchange, and the supply component 3 is used to supply the heat transfer oil.

[0070] like Figures 1 to 7 As shown, the enhanced cooling method for the graphitization kiln includes the following steps:

[0071] S1. Heat transfer oil is supplied to the circulation pipeline through the supply component 3, and the heat transfer oil is controlled to circulate between the heat exchange module 11 and the cooling component along the circulation pipeline.

[0072] S2. Move the heat exchange module 11 to contact the area to be cooled in the graphitization kiln.

[0073] S3. Control the residence time of the heat transfer oil in the heat exchange module 11 so that the temperature of the cooling oil flowing out of the heat exchange module 11 rises to the first temperature, which is compatible with the working temperature of the heat transfer oil.

[0074] S4. After completing the cooling operation of the current area, adjust the position of the heat exchange module 11 and continue the cooling operation of the next area to be cooled until the cooling operation of the entire graphitization kiln is completed. After each adjustment of the position of the heat exchange module 11, the material suction operation is performed on the area that has been cooled.

[0075] The cooling method involves the following steps: Step S1: Supplying heat transfer oil to the circulation pipeline via the supply component 3, controlling the heat transfer oil to circulate between the heat exchange module 11 and the cooling component; Step S2: Moving the heat exchange module 11 to contact the area to be cooled in the graphitization kiln; and Step S3: Controlling the residence time of the heat transfer oil in the heat exchange module 11 to raise the temperature of the cooling oil exiting the heat exchange module 11 to a first temperature, which is compatible with the working temperature of the heat transfer oil; thereby exchanging heat with the graphitization kiln, accelerating the cooling rate of the graphitization kiln, and significantly shortening the cooling cycle; and Step S4: After completing the cooling operation of the current area, adjusting the position of the heat exchange module 11 to continue the cooling operation for the next area to be cooled, until... The entire graphitization kiln is cooled, and after each adjustment of the position of the heat exchange module 11, material is simultaneously sucked up from the cooled area. This not only avoids interference from the heat exchange module 11 with subsequent processes in the graphitization kiln and reduces the difficulty of implementation, but more importantly, it allows for material suction from the cooled area by moving the heat exchange module 11, achieving simultaneous cooling and material suction, greatly shortening the production cycle and improving production efficiency. In addition, the heat transfer oil that has completed heat exchange with the graphitization kiln flows back to the coil heat exchanger 2 for cooling. Furthermore, the heat absorbed by the coil heat exchanger 2 can be recovered to power other equipment, thereby reducing resource waste and improving energy utilization.

[0076] The graphitization kiln-enhanced cooling method increases the cooling rate of a 10cm thick insulation material by more than 50% when the temperature rise of the heat transfer oil is around 40℃, effectively shortening the product production cycle. Furthermore, in step S3, the first temperature is between 350℃ and 400℃. During this period, the heat transfer oil can operate safely and stably, meaning that it will not undergo significant chemical changes (such as oxidation or degradation) at this temperature. Preferably, the first temperature is 350℃, and the heating temperature is typically lower than or close to this high-temperature resistant temperature to ensure the stability and long lifespan of the heat transfer oil.

[0077] In this embodiment, the enhanced cooling method for the graphitization kiln mainly targets the cooling and temperature reduction of the insulation layer 100 at the top of the kiln. The insulation layer 100 is 15cm thick and needs to be cooled to below 500℃. The heat transfer oil used for heat exchange with the insulation layer 100 is a specialized oil with good thermal stability, characterized by uniform heating, accurate temperature control, ability to generate high temperatures under low vapor pressure, good heat transfer effect, energy saving, and convenient transportation and operation. Examples include biphenyl-diphenyl ether mixtures, hydrogenated terphenyl, silicon-based heat transfer oil, and synthetic alkylbenzene heat transfer oil. In this embodiment, a specific heat capacity of 1.5-2.5 kJ / kg·K and a density of 700-1000 kg / m³ are used. 3The heat transfer oil has a kinematic viscosity of 1-5 cSt (at 100°C), a flash point of 150-230°C, and an operating temperature range of 100-400°C. It is understood that in other embodiments, in addition to the heat transfer oil, other media with both good heat resistance and thermal conductivity can be selected to cool the insulation layer 100.

[0078] Optionally, such as Figure 2 As shown, the supply component 3 includes an oil boiling and storage tank 31, a first power pump 32, and a second power pump 33. The oil boiling and storage tank 31 is used for the storage and processing of heat transfer oil.

[0079] Step S1 also includes the following steps:

[0080] S11, the oil boiling and storage tank 31 is equipped with a supply pipe 36, the cooling component is equipped with a medium inlet and a medium outlet, the heat exchange module 11 is equipped with a heat exchange outlet and a heat exchange inlet, the supply pipe 36 is connected to the circulation pipe between the medium outlet and the heat exchange inlet, the first power pump 32 is connected to the circulation pipe between the medium outlet and the heat exchange inlet, the first power pump 32 is started to transport the heat transfer oil in the oil boiling and storage tank 31 to the circulation pipe through the supply pipe 36, and to make the heat transfer oil enter the heat exchange module 11 to cool the graphitization kiln;

[0081] S12, the second power pump 33 is connected to the circulation pipeline between the heat exchange outlet and the medium inlet. The second power pump 33 is used to transport the heat transfer oil flowing out of the heat exchange outlet to the cooling component. The cooling component is used to cool the heat transfer oil.

[0082] S13, the first power pump 32 transports the heat transfer oil in the oil storage tank 31 to the circulation pipeline. After the cooled heat transfer oil flows out of the medium outlet of the cooling component, it is replenished and then enters the heat exchange module 11 again to continue the cooling operation of the graphitization kiln, and the cycle repeats.

[0083] Since the heat transfer oil is lost during circulation, the first power pump 32 replenishes the lost heat transfer oil by continuing to transport the heat transfer oil in the oil storage tank 31 to the circulation pipeline between the medium outlet and the heat exchange inlet. In this mode, since both the first power pump 32 and the second power pump 33 are located on the circulation pipeline, the first power pump 32 and the second power pump 33 can serve as a double insurance. Compared with a system with only one oil pump, even if one of them fails, it will not affect the circulation of the cooling medium. In high-temperature operating environments, although the viscosity of the heat transfer oil is low, corrosion of the oil pump may still occur during long-term operation. By using a one-in-one-out configuration, the oil pump can be changed without stopping the system to ensure continuous operation of the device.

[0084] Optionally, such as Figure 3As shown, the supply component 3 includes an oil boiling and storage tank 31, a first power pump 32, a second power pump 33, and a one-way valve 34. The oil boiling and storage tank 31 is used for the storage and processing of heat transfer oil.

[0085] Step S1 also includes the following steps:

[0086] S11, the oil boiling and storage tank 31 is provided with a supply pipe 36, the cooling component is provided with a medium inlet and a medium outlet, the heat exchange module 11 is provided with a heat exchange outlet and a heat exchange inlet, the supply pipe 36 is provided with a circulation pipe connected between the heat exchange outlet and the medium inlet, the supply pipe 36 is also provided with a one-way valve 34 located between the oil boiling and storage tank 31 and the circulation pipe, the second power pump 33 is connected to the circulation pipe between the heat exchange outlet and the medium inlet, the second power pump 33 is started to transport the heat transfer oil in the oil boiling and storage tank 31 to the circulation pipe through the supply pipe 36, and transport the heat transfer oil to the cooling component, the cooling component is used to cool the heat transfer oil;

[0087] S12. The oil boiling and storage tank 31 is equipped with a return pipe 35, which is connected to the circulation pipe between the medium outlet and the heat exchange inlet. The first power pump 32 is connected between the return pipe 35 and the circulation pipe. After the heat transfer oil that has been cooled in the cooling component flows out of the medium outlet, it is divided into two paths. One part continues to flow along the circulation pipe and enters the heat exchange module 11 to cool the graphitization kiln. The other part enters the oil boiling and storage tank 31 through the return pipe 35 under the action of the first power pump 32 for oil boiling treatment to remove moisture and gas impurities. The treated heat transfer oil is transported to the circulation pipe through the supply pipe 36 under the operation of the second power pump 33 to merge with the heat transfer oil flowing out of the heat exchange module 11.

[0088] S13 and the second power pump 33 deliver the heat transfer oil that has completed the convergence to the cooling components for cooling operations, and repeat the cycle.

[0089] In this mode, the content of moisture and gaseous impurities in the heat transfer oil can be controlled while the graphitization kiln is being cooled. This prevents the moisture and gaseous impurities from being too high, which could lead to unstable properties of the heat transfer oil under high-temperature operation, causing drastic fluctuations and affecting the stability of the system.

[0090] Optionally, the oil heating and storage tank 31 includes an oil heater, an oil storage tank, and an expansion tank structure. The oil storage tank is used to store heat transfer oil, the oil heater is located inside the oil storage tank, and the oil heater is used to heat and treat the heat transfer oil. The expansion tank is used to cope with the pressure release of the heat transfer oil at high temperature during thermal expansion after heat treatment. A pre-step S0 is also provided before step S1. The pre-step S0 includes the following steps:

[0091] S01. Start the oil heating device to heat the heat transfer oil in the oil storage tank and perform the oil heating operation.

[0092] S02. After the oil boiling operation is completed, let it stand and cool so that the temperature of the heat transfer oil in the oil storage tank drops to the second temperature, which is less than or equal to 100°C.

[0093] S03. The cooled heat transfer oil is transported into the system for cold oil trial circulation.

[0094] S04. Detect the inlet and outlet pressures, pressure difference, and liquid level of the expansion tank of the cooling components and heat exchange module 11 to ensure that the heat transfer oil can circulate continuously.

[0095] Before cooling the graphitization kiln, a preliminary step S0 is performed to circulate cold oil throughout the entire system. This removes moisture, low-volatility components, and gaseous impurities from the heat transfer oil, which can affect its heat exchange efficiency and ensure stability during low-oil-temperature trial operation. Furthermore, the cold oil circulation allows for the prior detection of inlet and outlet pressures, differential pressures, and expansion tank levels of the cooling components and heat exchange module 11, ensuring continuous circulation during formal operation.

[0096] In this embodiment, the oil-heating and storage tank 31 is actually a thermal oil heater in the prior art, a type of direct-flow special boiler used for heating crude oil and natural gas. Thermal oil heaters are also called organic heat carrier furnaces, commonly known as thermal oil boilers, and officially called hot oil heaters. They are a new type of thermal energy equipment that uses coal, oil, or gas as fuel and thermal oil as the circulating medium for heating. The advantages of thermal oil heaters lie in their "high temperature and low pressure" and stable operation, leading to their widespread use. The types of oil heaters mainly include coal-fired, oil-fired, electrically heated, and coal-water slurry types. The type of oil heater can be freely selected according to requirements. In this embodiment, the type of oil heater is electrically heated, using electric heating rods inserted into the oil storage tank for heating, or electric heating wires can be used to heat the interior of the oil storage tank.

[0097] Optionally, the expansion tank is located at the highest point of the oil boiling and storage tank 31. By placing the expansion tank at the highest point of the oil boiling and storage tank 31, the gas, being lighter than air, naturally rises and accumulates in the expansion tank. The gas in the system is then removed through periodic venting operations, ensuring the purity and heat transfer performance of the heat transfer oil.

[0098] In this embodiment, the main functions of the expansion tank include accommodating the volume of the heat transfer fluid as it expands due to heat, venting light components from newly filled products and low-boiling substances generated during operation, compensating for evaporation and operational losses, and providing nitrogen sealing. The expansion tank is configured as a conventional structure for thermal oil furnaces, and this invention does not impose any special limitations on it.

[0099] Optionally, step S4 further includes the following steps:

[0100] S41. A temperature sensor 14 is provided on the heat exchange module 11 for detecting the temperature of the graphitization kiln. The temperature sensor 14 is used to detect the area of ​​the graphitization kiln that is currently in contact with the heat exchange module 11.

[0101] S42. After the area in contact with the graphitization kiln and the heat exchange module 11 is cooled to the required temperature, the heat exchange module 11 is moved using hoisting equipment to cool another area of ​​the graphitization kiln that needs to be cooled, and the material is sucked up from the previous area. The above steps are repeated until the cooling operation of the entire area of ​​the graphitization kiln is completed.

[0102] By setting a temperature sensor 14, the temperature of the insulation layer 100 on the top of the graphitization kiln is detected. When the temperature is cooled to the specified temperature, the position of the heat exchange module 11 is adjusted by hoisting equipment to continue the cooling operation until the insulation layer 100 on the top of the graphitization kiln is cooled to the specified temperature.

[0103] In this embodiment, the temperature sensor 14 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 14 and the heat exchange module 11, the heat exchange module 11 is provided with a threaded through hole. The temperature sensor 14 is provided with an external thread that is threaded to the threaded through hole. By inserting the temperature sensor 14 into the threaded through hole of the heat exchange module 11, the connection and fixation between the temperature sensor 14 and the heat exchange module 11 can be achieved by screwing the temperature sensor 14.

[0104] Optionally, such as Figure 5 As shown, in step S41, when the temperature sensor 14 detects the temperature, it needs to detect three temperature measurement points. The distances of the three temperature measurement points from the heat exchange module 11 are 50mm, 100mm, and 150mm, respectively. By setting multiple temperature measurement points at different distances, the accuracy of temperature measurement is ensured. In other embodiments, the number and position of temperature measurement points can be adjusted as needed.

[0105] Optionally, in step S3, the cooling time of the heat transfer oil in the cooling component is T, and it satisfies 1min≤T≤5min. By limiting the cooling time T of the heat transfer oil in the coil-type tube heater to satisfy 1min≤T≤5min, it is possible to avoid insufficient heat exchange due to an excessively short heat exchange time, and to avoid excessively long heat exchange time, which would result in excessively low temperature of the heat transfer oil and excessive viscosity, which would be detrimental to circulation.

[0106] The cooling time T of the heat transfer oil in the coil-type tube heater can be any value between 1 min and 5 min or any range between two values, such as 1 min, 2 min, 3 min, 4 min, 5 min, etc.

[0107] In this embodiment, a graphitization kiln enhanced cooling device is also provided. This device applies the aforementioned graphitization kiln enhanced cooling method to cool the graphitization kiln. The device includes a heat exchange module 11, a supply component 3, and a cooling component. This device, by utilizing the graphitization kiln enhanced cooling method, not only accelerates the cooling rate but also achieves simultaneous cooling and material intake, significantly shortening the production cycle and improving production efficiency. Furthermore, by using a coil-type heat exchanger 2 to cool the heat transfer oil, heat is recovered, thereby reducing resource waste and improving energy utilization.

[0108] Optionally, the heat exchange module 11 includes multiple heat exchange tubes 111 arranged side by side and heat exchange fins 112 connected to both sides of the heat exchange tubes 111. The multiple heat exchange tubes 111 are connected in parallel to the circulation pipeline. By connecting heat exchange fins 112 to both sides of each heat exchange tube 111, the heat exchange area of ​​the heat exchange module 11 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 111 are connected in parallel, so that each heat exchange tube 111 can perform heat exchange independently, improving the uniformity of heat exchange. In addition, the independent heat exchange of each heat exchange tube 111 means that even if a blockage occurs inside one heat exchange tube 111, the other heat exchange tubes 111 can still perform cooling operations normally.

[0109] Optionally, the heat exchange module 11 includes multiple heat exchange tubes 111 arranged side by side and heat exchange fins 112 connected to both sides of the heat exchange tubes 111. The multiple heat exchange tubes 111 are connected in series in a serpentine manner in the circulation pipeline. By connecting the multiple heat exchange tubes 111 in series in a serpentine manner in the circulation pipeline, the flow path of the heat transfer oil in the heat exchange module 11 is extended, and the flow time is extended, so that the heat transfer oil in the heat exchange module 11 can fully exchange heat with the graphitization kiln.

[0110] In this embodiment, the heat exchange tubes 111 and heat exchange fins 112 are connected by welding. This ensures that the heat exchange fins 112 fix the heat exchange tubes 111 and prevents the heat exchange tubes 111 from bending under thermal stress. To ensure a balanced flow of heat transfer oil in each heat exchange tube 111, a flow meter is installed at the heat exchange outlet of each heat exchange tube 111 to monitor the flow rate of the heat transfer oil. The number of heat exchange tubes 111 can be freely set according to the required heat exchange area.

[0111] Optionally, the heat exchange assembly 1 includes a flexible pipe 12, with both the heat exchange inlet and outlet connected to the flexible pipe 12. The presence of flexible pipes 12 at both the heat exchange inlet and outlet of the heat exchange module 11 allows the flexible pipe 12 to adapt and deform during movement of the heat exchange module 11, preventing damage at the connection points compared to rigid connections. In this embodiment, the flexible pipe 12 is a corrugated hose, which not only possesses 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 12. Optionally, the corrugated hose can be made of metal, non-metal, or composite materials as described in the prior art; this invention is not limited to any particular type.

[0112] Optionally, the heat exchange assembly 1 includes an elbow 13. Both the heat exchange inlet and outlet of the heat exchange module 11 are connected to the elbow 13. One end of the elbow 13 is connected to the heat exchange module 11, and the other end extends away from the graphitization kiln and is connected to a flexible pipe 12. By connecting the flexible pipe 12 to the other end of the elbow 13 extending away from the graphitization kiln, the distance between the flexible pipe 12 and the graphitization kiln is increased, reducing the thermal impact of the high temperature of the graphitization kiln on the flexible pipe 12. In this embodiment, the elbow 13 is a 90° elbow.

[0113] Optionally, the heat exchange module 11 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 11 to contact the top of the kiln is beneficial for cooling the insulation layer 100 located at the top of the kiln.

[0114] Optionally, the heat exchange fins 112 are also provided with lifting lugs 113. In this embodiment, the lifting equipment is connected to the lifting lugs 113 to drive the heat exchange module 11 to move. By providing lifting lugs 113 on the heat exchange fins 112, it is convenient to connect the lifting equipment used to drive the heat exchange module 11 to the heat exchange module 11.

[0115] In this embodiment, the hoisting equipment 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 113. When it is necessary to move the heat exchange module 11, the traveling device is first started to move it directly above the heat exchange module 11. Then the electric hoist is started to lower the hook. The hook is then connected to the lifting lug 113. The electric hoist is started again to lift the heat exchange module 11. The traveling device is then started to move the heat exchange module 11. Once it reaches the desired position, the electric hoist is used to lower the heat exchange module 11 and separate the hook from the lifting lug 113, thus achieving the position adjustment of the heat exchange module 11.

[0116] In other embodiments, in addition to providing lifting lugs 113 on the heat exchange fins 112, threaded holes can also be opened on the heat exchange fins 112, and lifting rings can be threaded into the threaded holes, so that the lifting rings can be connected to the heat exchange fins 112 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.

[0117] Optionally, the graphitization kiln enhanced cooling device also includes a circulation pipe, which includes an ascending pipe 4, a descending pipe 5, and a reducing pipe 6. The reducing pipe 6 has a larger diameter end and a smaller diameter end. The inlet and outlet of the ascending pipe 4 are both connected to the smaller diameter end of the reducing pipe 6. The larger diameter end of the reducing pipe 6 connected to the inlet of the ascending pipe 4 is connected to the side of the flexible pipe 12 away from the elbow 13. The larger diameter end of the reducing pipe 6 connected to the outlet of the ascending pipe 4 is connected to the medium inlet. The descending pipe 5 is connected between the side of the flexible pipe 12 away from the elbow 13 and the medium outlet.

[0118] By setting up riser pipe 4 and downcomer pipe 5, a channel for the heat transfer oil to circulate between heat exchange module 11 and coil heat exchanger 2 is formed in cooperation with flexible pipe 12. Furthermore, by connecting reducer pipe 6 to both the inlet and outlet of riser pipe 4, the flow rate of heat transfer oil can be accelerated when it enters riser pipe 4 through reducer pipe 6, and reduced when it flows out of riser pipe 4 through reducer pipe 6. This prolongs the heat exchange time of heat transfer oil in coil heat exchanger 2, thereby improving the cooling effect of coil heat exchanger 2 on heat transfer oil.

[0119] In this embodiment, the outer side of the circulation pipe is covered with thermal insulation cotton to provide thermal insulation and prevent leakage.

[0120] Optionally, such as Figure 7 As shown, the reducing pipe 6 is conical in shape, and the inclination angle of the wall of the reducing pipe 6 is θ, satisfying 20°≤θ≤30°. By limiting the inclination angle θ of the wall of the reducing pipe 6 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. The inclination angle θ of the wall of the reducing pipe 6 is the angle between the wall of the reducing pipe 6 and the central axis of the reducing pipe 6.

[0121] The inclination angle θ of the wall of the reducing pipe 6 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.

[0122] Optionally, the coil-type heat exchanger 2 includes a heat exchange coil 21 and a cooling chamber 22. The heat exchange coil 21 is disposed inside the cooling chamber 22, and heat transfer oil flows within the heat exchange coil 21. The heat exchange coil 21 has a medium inlet and a medium outlet. The cooling chamber 22 is used to cool the heat transfer oil. By placing the heat exchange coil 21 within the cooling chamber 22 filled with cooling medium, the heat exchange coil 21, with the flowing heat transfer oil, is surrounded by the cooling chamber 22 containing the cooling medium, resulting in sufficient heat exchange area and high heat exchange efficiency. In this embodiment, condensate, serving as the cooling medium, flows within the cooling chamber 22.

[0123] In addition to the cooling chamber 22 provided in this embodiment for cooling the heat transfer oil, in other embodiments, heat exchange can also be achieved by winding a cooling pipe with condensate flowing inside the heat exchange coil 21 around the outside of the heat exchange coil 21. In this case, the cooling pipe replaces the cooling chamber 22. In addition, in other embodiments, liquid nitrogen can be supplied into the cooling chamber 22 to cool the heat transfer oil by vaporization of the liquid nitrogen, and then the vaporized gas of the liquid nitrogen is discharged through a gas-liquid separator.

[0124] Optionally, the radius of the heat exchange coil 21 is R1, and the radius of the cooling chamber 22 is R, satisfying R1≥2R / 3. Since the temperature of the heat transfer oil decreases after heat exchange with the condensate (which serves as the cooling medium), increasing its viscosity, the radius of curvature of the heat exchange coil 21 is limited to be no less than two-thirds of the radius of the cooling chamber 22. This ensures that the radius of curvature of the heat exchange coil 21 is sufficiently large, reducing the resistance to the flow of the heat transfer oil and allowing it to flow smoothly within the heat exchange coil 21 even after cooling.

[0125] Optionally, the bending angle of the heat exchange coil 21 is no greater than 15°. Since the temperature of the heat transfer oil decreases after heat exchange with the condensate, which serves as the cooling medium, the viscosity of the heat transfer oil increases. Therefore, by limiting the bending angle of the heat exchange coil 21 to no more than 15°, the resistance of the heat exchange coil 21 to the heat transfer oil at the corner is reduced, allowing the heat transfer oil to pass smoothly through the corner of the heat exchange coil 21 even after cooling.

[0126] Optionally, the medium inlet is located at the top of the heat exchange coil 21, and the medium outlet is located at the bottom of the heat exchange coil 21. The cooling chamber 22 is provided with a cooling medium inlet 221 and a cooling medium outlet 222. The cooling medium inlet 221 is located at the bottom of the cooling chamber 22, and the cooling medium outlet 222 is located at the top of the cooling chamber 22. By placing the medium inlet of the heat exchange coil 21 at the top and the medium outlet of the heat exchange coil 21 at the bottom, the flow direction of the heat transfer oil is from top to bottom. However, by placing the cooling medium inlet 221 at the bottom of the cooling chamber 22 and the cooling medium outlet 222 at the top of the cooling chamber 22, 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 transfer oil, thereby improving the heat exchange effect.

[0127] In this embodiment, a waste heat recovery system is also provided, including the aforementioned graphitization kiln enhanced cooling device or the aforementioned graphitization kiln enhanced cooling method. The waste heat recovery system recovers waste heat by utilizing the heat absorbed by the cooling components of the graphitization kiln enhanced cooling device. This waste heat recovery system utilizes the coil-type heat exchanger 2 of the graphitization kiln enhanced cooling device to transfer heat oil, achieving energy recovery of heat. The recovered heat can be used to power other equipment, thereby reducing resource waste and improving energy utilization efficiency.

[0128] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. 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 the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for enhanced cooling of a graphitization kiln, characterized in that, A graphitization kiln enhanced cooling device is used, comprising a circulation pipeline for the flow of heat transfer oil, a heat exchange component (1) and a cooling component disposed on the circulation pipeline, and a supply component (3) connected to the circulation pipeline. The heat exchange component (1) includes a movable heat exchange module (11) which can be close to and away from the graphitization kiln. The heat exchange component (1) is used to cool the heat transfer oil through heat exchange, and the supply component (3) is used to supply the heat transfer oil. The graphitization kiln enhanced cooling method includes the following steps: S1. Heat transfer oil is supplied to the circulation pipeline through the supply component (3), and the heat transfer oil is controlled to circulate between the heat exchange module (11) and the cooling component along the circulation pipeline; S2. Move the heat exchange module (11) to contact the area to be cooled in the graphitization kiln; S3. Control the residence time of the heat transfer oil in the heat exchange module (11) so that the temperature of the heat transfer oil flowing out of the heat exchange module (11) rises to a first temperature, the first temperature being compatible with the working temperature of the heat transfer oil. S4. After completing the cooling operation of the current area, adjust the position of the heat exchange module (11) and continue the cooling operation of the next area to be cooled until the cooling operation of the entire area of ​​the graphitization kiln is completed. After each adjustment of the position of the heat exchange module (11), the material suction operation is performed on the area that has been cooled.

2. The enhanced cooling method for graphitization kilns according to claim 1, characterized in that, The supply component (3) includes an oil boiling and storage tank (31), a first power pump (32) and a second power pump (33). The oil boiling and storage tank (31) is used for the storage and processing of the heat transfer oil. Step S1 also includes the following steps: S11. The oil boiling and storage tank (31) is provided with a supply pipe (36), the cooling component is provided with a medium inlet and a medium outlet, the heat exchange module (11) is provided with a heat exchange outlet and a heat exchange inlet, the supply pipe (36) is connected to the circulation pipeline between the medium outlet and the heat exchange inlet, the first power pump (32) is connected to the circulation pipeline between the medium outlet and the heat exchange inlet, the first power pump (32) is started to transport the heat transfer oil in the oil boiling and storage tank (31) to the circulation pipeline through the supply pipe (36), and to allow the heat transfer oil to enter the heat exchange module (11) to cool the graphitization kiln; S12. The second power pump (33) is connected to the circulation pipeline between the heat exchange outlet and the medium inlet. The second power pump (33) is used to transport the heat transfer oil flowing out of the heat exchange outlet to the cooling assembly. The cooling assembly is used to cool the heat transfer oil. S13. The first power pump (32) delivers the heat transfer oil in the oil storage tank (31) to the circulation pipeline. After the cooled heat transfer oil flows out of the medium outlet of the cooling component, it is replenished and then enters the heat exchange module (11) again to continue cooling the graphitization kiln. The cycle repeats.

3. The enhanced cooling method for graphitization kilns according to claim 1, characterized in that, The supply component (3) includes an oil boiling and storage tank (31), a first power pump (32), a second power pump (33), and a one-way valve (34). The oil boiling and storage tank (31) is used for the storage and processing of the heat transfer oil. Step S1 also includes the following steps: S11. The oil storage tank (31) is provided with a supply pipe (36), the cooling assembly is provided with a medium inlet and a medium outlet, the heat exchange module (11) is provided with a heat exchange outlet and a heat exchange inlet, the supply pipe (36) is provided on the circulation pipeline connected between the heat exchange outlet and the medium inlet, the supply pipe (36) is also provided with a one-way valve (34) located between the oil storage tank (31) and the circulation pipeline, the second power pump (33) is connected to the circulation pipeline between the heat exchange outlet and the medium inlet, the second power pump (33) is started to transport the heat transfer oil in the oil storage tank (31) through the supply pipe (36) to the circulation pipeline, and transport the heat transfer oil to the cooling assembly, the cooling assembly is used to cool the heat transfer oil; S12. The oil boiling and storage tank (31) is provided with a return pipe (35). The return pipe (35) is connected to the circulation pipe between the medium outlet and the heat exchange inlet. The first power pump (32) is connected between the return pipe (35) and the circulation pipe. After the heat transfer oil that has been cooled in the cooling assembly flows out of the medium outlet, it is divided into two paths. One part continues to flow along the circulation pipe and enters the heat exchange module (11) to cool the graphitization kiln. The other part enters the oil boiling and storage tank (31) through the return pipe (35) under the action of the first power pump (32) to perform oil boiling treatment, remove moisture and gas impurities. The treated heat transfer oil is transported to the circulation pipe through the supply pipe (36) under the operation of the second power pump (33) and merges with the heat transfer oil flowing out of the heat exchange module (11). S13, the second power pump (33) delivers the heat transfer oil that has completed the confluence to the cooling component for cooling operation, and repeats the cycle.

4. The method for enhanced cooling of a graphitization kiln according to any one of claims 2-3, characterized in that, The oil heating and storage tank (31) includes an oil heater, an oil storage tank, and an expansion tank structure. The oil storage tank is used to store the heat transfer oil. The oil heater is located inside the oil storage tank and is used to heat the heat transfer oil. The expansion tank is used to release the pressure of the heat transfer oil when it is at a high temperature after heat treatment and expands. A pre-step S0 is provided before step S1. The pre-step S0 includes the following steps: S01. Start the oil heating device to heat the heat transfer oil in the oil storage tank and perform the oil heating operation. S02. After the oil boiling operation is completed, let it stand and cool so that the temperature of the heat transfer oil in the oil storage tank drops to a second temperature, which is less than or equal to 100°C. S03. The cooled heat transfer oil is transported into the system for cold oil trial circulation. S04. Detect the inlet and outlet pressures and differential pressures of the cooling assembly and the heat exchange module (11), as well as the liquid level of the expansion tank, to ensure that the heat transfer oil can circulate continuously.

5. The method for enhanced cooling of a graphitization kiln according to claim 1, characterized in that, Step S4 further includes the following steps: S41. The heat exchange module (11) is provided with a temperature sensor (14) for detecting the temperature of the graphitization kiln. The temperature sensor (14) is used to detect the area of ​​the graphitization kiln that is currently in contact with the heat exchange module (11). S42. After the area of ​​the graphitization kiln in contact with the heat exchange module (11) is cooled to the required temperature, the heat exchange module (11) is moved using a hoisting device so that the heat exchange module (11) cools another area of ​​the graphitization kiln to be cooled and performs material suction operation on the previous area. The above steps are repeated until the cooling operation of the entire area of ​​the graphitization kiln is completed.

6. The method for enhanced cooling of a graphitization kiln according to claim 5, characterized in that, In step S41, when the temperature is detected by the temperature sensor (14), the temperature sensor (14) needs to detect three temperature measurement points. The distances of the three temperature measurement points from the heat exchange module (11) are 50mm, 100mm and 150mm, respectively.

7. The method for enhanced cooling of a graphitization kiln according to claim 1, characterized in that, In step S3, the time for the heat transfer oil to cool in the cooling assembly is T, and it satisfies 1min≤T≤5min.

8. A cooling device for graphitization kilns, characterized in that, The graphitization kiln enhanced cooling device uses the graphitization kiln enhanced cooling method as described in any one of claims 1-7 to cool the graphitization kiln. The graphitization kiln enhanced cooling device includes the heat exchange module (11), the supply component (3), and the cooling component.

9. The enhanced cooling device for graphitization kilns according to claim 8, characterized in that, The heat exchange assembly (1) includes at least one of the following features: I. The heat exchange module (11) includes a plurality of heat exchange tubes (111) arranged side by side and heat exchange fins (112) connected to both sides of the heat exchange tubes (111); the plurality of heat exchange tubes (111) are connected in parallel to the circulation pipeline, or the plurality of heat exchange tubes (111) are connected in series in a serpentine manner to the circulation pipeline; II. The heat exchange assembly (1) includes a flexible pipe (12), and the heat exchange tube (111) is provided with a heat exchange inlet and a heat exchange outlet, and the heat exchange inlet and the heat exchange outlet are both connected to the flexible pipe (12); III. The heat exchange component (1) includes an elbow (13). The heat exchange inlet and the heat exchange outlet of the heat exchange module (11) are both connected to the elbow (13). One end of the elbow (13) is connected to the heat exchange module (11), and the other end extends away from the graphitization kiln and is connected to the flexible pipe (12). IV. The heat exchange module (11) can be moved to contact the top of the graphitization furnace.

10. The enhanced cooling device for graphitization kilns according to claim 9, characterized in that, The graphitization kiln enhanced cooling device further includes a circulation pipeline, which includes at least one of the following conditions: I. The circulation pipeline includes an ascending pipe (4), a descending pipe (5), and two reducing pipes (6). The reducing pipes (6) have a larger diameter end and a smaller diameter end. The inlet and outlet of the ascending pipe (4) are respectively connected to the smaller diameter ends of the two reducing pipes (6). The reducing pipe (6) connected to the inlet of the ascending pipe (4) has its larger diameter end leading to the heat exchange module (11). The reducing pipe (6) connected to the outlet of the ascending pipe (4) has its larger diameter end leading to the cooling assembly. The descending pipe (5) is connected between the heat exchange module (11) and the medium outlet of the cooling assembly. II. The reducing pipe (6) is in the shape of a cone, and the inclination angle of the wall of the reducing pipe (6) is θ, which satisfies 20°≤θ≤30°.

11. The enhanced cooling device for graphitization kilns according to claim 8, characterized in that, The cooling assembly includes a coil heat exchanger (2) having a medium inlet and a medium outlet, and the coil heat exchanger (2) having at least one of the following conditions: I. The coil heat exchanger (2) includes a heat exchange coil (21) and a cooling chamber (22). The heat exchange coil (21) is located inside the cooling chamber (22). The heat transfer oil flows inside the heat exchange coil (21), and it is provided with a medium inlet and a medium outlet. The cooling chamber (22) is used to cool the heat transfer oil. II. The radius of the heat exchange coil (21) is R1, and the radius of the cooling chamber (22) is R, and R1≥2R / 3 is satisfied; III. The bending angle of the heat exchange coil (21) shall not exceed 15°; IV. The medium inlet is located at the top of the heat exchange coil (21), and the medium outlet is located at the bottom of the heat exchange coil (21). The cooling chamber (22) is provided with a cooling medium inlet (221) and a cooling medium outlet (222). The cooling medium inlet (221) is located at the bottom of the cooling chamber (22), and the cooling medium outlet (222) is located at the top of the cooling chamber (22).

12. A waste heat recovery system, characterized in that, The waste heat recovery system includes the graphitization kiln enhanced cooling device as described in any one of claims 8-11 or applied to the graphitization kiln enhanced cooling method as described in any one of claims 1-7, wherein the waste heat recovery system recovers waste heat by utilizing the heat absorbed by the cooling components of the graphitization kiln enhanced cooling device.

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