A rapid cooling device applied to a graphitization furnace

Abstract

The application relates to the technical field of graphitization furnaces, and discloses a rapid cooling device applied to a graphitization furnace. By arranging a spraying ring and a spraying head, external cooling water can be introduced into a heat exchange cavity and sprayed to the outer periphery of the graphitization furnace to form a water curtain, and the multiple components can cooperate to rapidly reduce the temperature of the graphitization furnace. In the application, independent water supply is realized through a cold water tank and a water storage pool, the temperature of the water in the cold water tank is lower than that of the water in the water storage pool, multiple spraying rings independently supply water, and the proportion of the water in the cold water tank and the water in the water storage pool entering the corresponding spraying rings can be controlled through adjustment of first and second flow valves, so that the temperature of the water finally discharged by the spraying rings is controlled, and more further, the cooling rate of the outer wall of the graphitization furnace can be controlled in a targeted manner, for example, the amount of cold water supplied to the furnace wall near the core of the graphitization furnace can be increased, and the amount of normal-temperature water supplied can be reduced.

Description

Technical Field

[0001] This application relates to the field of graphitization furnace technology, and more specifically to a rapid cooling device applied to a graphitization furnace. Background Technology

[0002] A graphitization furnace is a high-temperature heat treatment device used to convert carbon materials (such as petroleum coke, pitch coke, and carbon fibers) into graphite crystal structures under an inert atmosphere (such as nitrogen or argon) at 2000–3000℃, thereby improving their electrical conductivity, thermal conductivity, mechanical strength, and chemical stability. The cooling process of the graphitization furnace directly affects product quality, production efficiency, and equipment lifespan, making it a crucial and indispensable step in the process.

[0003] Graphitized materials exposed directly to low temperatures at high temperatures may crack or even fracture due to uneven thermal stress. Controlling the cooling rate (e.g., 10–20°C / h for the high-temperature section and 30–50°C / h for the low-temperature section) can reduce the scrap rate. Currently, graphitization furnaces use forced air cooling when the temperature reaches above 400°C, and spray cooling can be used to accelerate the temperature reduction once the temperature drops below 400°C. However, the spray cooling rate is currently uncontrollable, and the cooling rate at different temperature stages cannot be flexibly controlled. Utility Model Content

[0004] In view of the above problems, this application provides a rapid cooling device for graphitization furnaces, which can perform spray cooling in the low-temperature stage after the graphitization furnace temperature drops to 400 degrees, and the cooling rate is flexible and controllable.

[0005] According to one aspect of the embodiments of this application, a rapid cooling device for a graphitization furnace is provided. The rapid cooling device for a graphitization furnace includes a jacket surrounding the furnace, a cold water tank, and a water storage tank. The jacket and the graphitization furnace together form a closed heat exchange chamber. A gas supply assembly communicating with the heat exchange chamber is provided at the bottom end of the jacket, and an air induced draft assembly communicating with the heat exchange chamber is provided at the top end of the jacket. Multiple spray rings are arranged in sequence from top to bottom within the heat exchange chamber. Multiple spray heads are connected to each spray ring. The water outlet end of the spray head is tilted so that it faces the outer wall of the graphitization furnace at a tangential angle. A main water supply pipe is connected to the spray ring and extends to the outer periphery of the jacket. One end of the main water supply pipe is connected to a water pump. The water inlet end of the water pump is connected to a first water supply pipe and a second water supply pipe through a three-way pipe. A first flow valve and a second flow valve are respectively installed on the first water supply pipe and the second water supply pipe. The ends of the multiple first water supply pipes away from the water pump are all connected to the water storage tank. The ends of the multiple second water supply pipes away from the water pump are all connected to the cold water tank.

[0006] In some embodiments, a cooler is provided on one side of the cold water tank, a heat exchange coil is provided between the cooler and the cold water tank, a water supply pipe is connected between the cold water tank and the water storage tank, a water pump is provided on the water supply pipe, and a level gauge and a temperature detection device are provided at the cold water tank.

[0007] In some embodiments, the air intake assembly includes a plurality of air intake boxes disposed on the top of the jacket and connected to the heat exchange chamber. A high-temperature resistant negative pressure machine is disposed inside the air intake box, and the end of the high-temperature resistant negative pressure machine is connected to the water storage tank through an air intake pipe.

[0008] In some embodiments, the air supply assembly includes an air outlet ring disposed below the jacket, with a plurality of air outlet bends connected above the air outlet ring, and a blower connected to the air outlet ring via a pipe.

[0009] In some embodiments, thermocouples are included, and there are multiple thermocouples evenly distributed on the outer wall of the graphitization furnace.

[0010] In some embodiments, a PLC controller is included, the first flow valve and the second flow valve are both solenoid valves, and a plurality of solenoid valves and the thermocouple are electrically connected to the PLC controller.

[0011] In some embodiments, a return pipe is provided at the lower end of the jacket, and the end of the return pipe extends to the water storage tank.

[0012] The beneficial effects of this application are as follows: By setting up spray rings and spray heads, external cooling water can be introduced into the heat exchange chamber and sprayed onto the outer periphery of the graphitization furnace to form a water curtain, thereby removing heat from the outer periphery of the graphitization furnace for rapid heat exchange. The gas supply component vents air into the heat exchange chamber and replaces the high-temperature air inside the heat exchange chamber. The induced draft component rapidly extracts the gas and water vapor inside the heat exchange chamber into the water storage tank. The cooperation of multiple components can rapidly cool the temperature of the graphitization furnace. In this application, by setting up a cold water tank and a water storage tank for independent water supply, and the temperature of the water in the cold water tank is lower than that of the water in the water storage tank, multiple spray rings are supplied with water independently, and the ratio of water in the cold water tank and water in the water storage tank entering the corresponding spray ring can be controlled by adjusting the first flow valve and the second flow valve, thereby controlling the final temperature of the water exiting the spray ring. Furthermore, the cooling rate of the outer wall of the graphitization furnace can be targeted and adjusted. For example, the supply of cold water can be increased and the supply of room temperature water can be reduced near the furnace core.

[0013] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0014] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the device provided in the embodiments of this application; Figure 2 This is a schematic diagram of the overall half-section structure of the device provided in the embodiments of this application; Figure 3 This is a schematic diagram of the overall half-section structure of the device from another perspective, provided for an embodiment of this application.

[0015] The reference numerals in the detailed embodiments are as follows: A rapid cooling device 100 for a graphitization furnace, a graphitization furnace 110, a jacket 120, a return pipe 121, a cold water tank 130, an air supply assembly 140, an air outlet ring 141, an air outlet bend 142, an induced draft assembly 150, an induced draft box 151, a high-temperature resistant negative pressure unit 152, an induced draft pipe 153, a spray ring 160, a spray head 161, a main water supply pipe 162, a water pump 163, a tee pipe 164, a first water supply pipe 165, a second water supply pipe 166, a first flow valve 167, and a second flow valve 168. Detailed Implementation

[0016] The embodiments of the technical solution of this application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and the foregoing description of the accompanying drawings are intended to cover non-exclusive inclusion.

[0017] For details, please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the overall structure of the device provided in an embodiment of this application. Figure 2 This is a schematic diagram of the overall half-section structure of the device provided in an embodiment of this application. Figure 3 This is a schematic diagram of the overall semi-sectional structure of the device from another perspective, provided for an embodiment of this application. The rapid cooling device 100 applied to the graphitization furnace 110 includes a jacket 120 surrounding the graphitization furnace 110, a cold water tank 130, and a water storage tank. The graphitization furnace 110 is a prior art device, and a closed space is formed between the jacket 120 and the side wall of the graphitization furnace 110. The cold water tank 130 provides low-temperature water, and the water storage tank liquefies water vapor and provides cooling water for spraying. The jacket 120 and the graphitization furnace 110 together form a closed heat exchange cavity. An air supply component 140, connected to the heat exchange cavity, is provided at the bottom of the jacket 120. The air supply component 140 is used to introduce air into the heat exchange cavity to quickly replace the high-temperature gas and water vapor inside the heat exchange cavity, thereby accelerating the removal of heat from the heat exchange cavity. The top of the jacket 120 is equipped with an exhaust fan 150 connected to the heat exchange chamber. The exhaust fan 150 is used to quickly extract the gas and water vapor inside the heat exchange chamber into the water storage tank. Multiple spray rings 160 are arranged inside the heat exchange chamber, arranged sequentially from top to bottom. Multiple spray heads 161 are connected to the spray rings 160, which spray liquid water from the spray rings 160 onto the outer wall of the graphitization furnace 110 for cooling. The water outlets of the multiple spray heads 161 are tilted and face the outer wall of the graphitization furnace 110 at a tangential angle. The liquid jets from the spray heads 161 act on the outer wall of the graphitization furnace 110, forming a water curtain to quickly remove heat from the periphery of the graphitization furnace 110. A main water supply pipe 162 is connected to the spray ring 160 and extends to the outer periphery of the jacket 120. One end of the main water supply pipe 162 is connected to a water pump 163. The water pump 163 can send liquid water from the first water supply pipe 165 and the second water supply pipe 166 to the main water supply pipe 162, and then further into the spray ring 160 through the main water supply pipe 162. The inlet of water pump 163 is connected to a first water supply pipe 165 and a second water supply pipe 166 via a three-way pipe 164. A first flow valve 167 and a second flow valve 168 are respectively installed on the first water supply pipe 165 and the second water supply pipe 166. The flow rate of the liquid in the corresponding pipe can be controlled by adjusting the opening degree of the first flow valve 167 and the second flow valve 168. Since the first water supply pipe 165 is connected to room temperature water in a water storage tank, and the second water supply pipe 166 is connected to low temperature water in a cold water tank 130, the temperature of the liquid water in the main water supply pipe 162 can be further controlled by adjusting the opening degree of the first flow valve 167 and the second flow valve 168. The ends of the multiple first water supply pipes 165 furthest from water pump 163 are all connected to the water storage tank, and the ends of the multiple second water supply pipes 166 furthest from water pump 163 are all connected to the cold water tank 130.

[0018] In this embodiment, the temperature of the graphitization furnace 110 can be monitored by thermocouples during operation. When the temperature of its outer periphery drops below 400 degrees Celsius, the equipment can be turned on for cooling. During operation, after the water pump 163 is turned on, the liquid water in the water storage tank and the cooling tank can be pumped to the main water supply pipe 162. The liquid water then enters the spray ring 160 and is sprayed onto the outer periphery of the graphitization furnace 110 through the spray head 161 to form a water curtain, thereby completing heat exchange. At the same time, the lower air supply component 140 introduces air into the heat exchange chamber. This air can replace the high-temperature air inside the heat exchange chamber and the water vapor formed after the spray water is vaporized. The induced draft component 150 can quickly extract the gas and water vapor inside the heat exchange chamber to the water storage tank, where the water vapor is reliquefied into water.

[0019] In summary, in this embodiment of the application, by setting the spray ring 160 and the spray head 161, external cooling water can be introduced into the heat exchange chamber and sprayed onto the outer periphery of the graphitization furnace 110 to form a water curtain, thereby removing the heat from the outer periphery of the graphitization furnace 110 for rapid heat exchange. The air supply component 140 vents air into the heat exchange chamber and replaces the high-temperature air inside the heat exchange chamber. The exhaust component 150 quickly extracts the gas and water vapor inside the heat exchange chamber into the water storage tank. With the cooperation of multiple components, the temperature of the graphitization furnace 110 can be rapidly reduced. In this application, a cold water tank 130 and a water storage tank are provided for independent water supply, and the temperature of the water in the cold water tank 130 is lower than the temperature of the water in the water storage tank. Multiple spray rings 160 are supplied with water independently, and the ratio of water from the cold water tank 130 and the water in the water storage tank entering the corresponding spray rings 160 can be controlled by adjusting the first flow valve 167 and the second flow valve 168, thereby controlling the final temperature of the water exiting the spray rings 160. Furthermore, the cooling rate of the outer wall of the graphitization furnace 110 can be targeted and adjusted. For example, the supply of cold water can be increased and the supply of room temperature water can be reduced near the furnace core. In some embodiments, a cooler is provided on one side of the cold water tank 130, and a heat exchange coil is provided between the cooler and the cold water tank 130. A water supply pipe is connected between the cold water tank 130 and the water storage tank, and a water pump 163 is provided on the water supply pipe. A level gauge and a temperature detection device are provided at the cold water tank 130. In this embodiment, the water can be cooled by a cooler and further cooled by a heat exchange coil in the cold water tank 130. The water in the cold water tank 130 can be drawn into the water storage tank through a water supply pipe.

[0020] In some embodiments, the induced draft assembly 150 includes a plurality of induced draft boxes 151 disposed on the top of the jacket 120 and communicating with the heat exchange chamber. A high-temperature resistant negative pressure compressor 152 is disposed within each induced draft box 151, and the end of the high-temperature resistant negative pressure compressor 152 is connected to a water storage tank via an induced draft pipe 153. In this embodiment, by induced drafting through the high-temperature resistant negative pressure compressor 152, high-temperature airflow and water vapor inside the heat exchange chamber can be extracted to the water storage tank. The water vapor can release heat in the water storage tank and be further liquefied before being recycled.

[0021] In some embodiments, the air supply assembly 140 includes an air outlet ring 141 disposed below the jacket 120, with a plurality of air outlet bends 142 connected above the air outlet ring 141, and a blower connected to the air outlet ring 141 via pipes. This application embodiment illustrates a specific configuration of the air supply assembly 140, in which air is supplied to the air outlet ring 141 by a blower and further blown into the heat exchange chamber through the air outlet bends 142.

[0022] In some embodiments, thermocouples are included, and multiple thermocouples are evenly distributed on the outer wall of the graphitization furnace 110. In this embodiment, thermocouples are used to detect the temperature of the outer wall of the graphitization furnace 110.

[0023] In some embodiments, a PLC controller is included, and the first flow valve 167 and the second flow valve 168 are both solenoid valves. Multiple solenoid valves and thermocouples are electrically connected to the PLC controller. In this embodiment, by setting up a PLC controller for automated control, the PLC controller can adjust the opening degree of each solenoid valve based on the monitoring data from the thermocouples, thereby reducing labor costs and improving the overall automation level of the equipment.

[0024] In some embodiments, a return pipe 121 is provided at the lower end of the jacket 120, and the end of the return pipe 121 extends to a water storage tank. In this embodiment, the liquid water inside the heat exchange chamber can be introduced into the water storage tank through the return pipe 121 for recycling.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although the foregoing embodiments have provided a detailed description of this application, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A rapid cooling device for use in a graphitization furnace, characterized in that, Applied to a graphitization furnace, it includes a jacket surrounding the graphitization furnace, a cold water tank, and a water storage tank. The jacket and the graphitization furnace together enclose a closed heat exchange cavity. The bottom end of the jacket is provided with a gas supply component that communicates with the heat exchange cavity, and the top end of the jacket is provided with an air induced draft component that communicates with the heat exchange cavity. Multiple spray rings are provided inside the heat exchange cavity. The spray rings are multiple in number, arranged sequentially from top to bottom. Each spray ring is connected to a plurality of spray heads. The water outlets of the spray heads are tilted so that they face the outer wall of the graphitization furnace at a tangential angle. A main water supply pipe is connected to the spray ring and extends to the outer periphery of the jacket. One end of the main water supply pipe is connected to a water pump. The water inlet of the water pump is connected to a first water supply pipe and a second water supply pipe via a T-junction. A first flow valve and a second flow valve are respectively installed on the first water supply pipe and the second water supply pipe. The ends of the plurality of first water supply pipes away from the water pump are all connected to the water storage tank, and the ends of the plurality of second water supply pipes away from the water pump are all connected to the cold water tank.

2. The rapid cooling device for a graphitization furnace according to claim 1, characterized by A cooler is provided on one side of the cold water tank. A heat exchange coil is provided between the cooler and the cold water tank. A water supply pipe is connected between the cold water tank and the water storage tank. A water pump is provided on the water supply pipe. A level gauge and a temperature detection device are provided at the cold water tank.

3. The rapid cooling device for a graphitization furnace according to claim 1, characterized by The air intake assembly includes multiple air intake boxes disposed on the top of the jacket and connected to the heat exchange chamber. A high-temperature resistant negative pressure machine is disposed inside the air intake box, and the end of the high-temperature resistant negative pressure machine is connected to the water storage tank through an air intake pipe.

4. The rapid cooling device for a graphitization furnace according to claim 1, characterized in that, The air supply assembly includes an air outlet ring disposed below the jacket, and multiple air outlet bends are connected above the air outlet ring. The air outlet ring is connected to a blower through a pipe.

5. The rapid cooling device for a graphitization furnace according to claim 1, characterized in that, It includes thermocouples, and there are multiple thermocouples, which are evenly distributed on the outer wall of the graphitization furnace.

6. The rapid cooling device for a graphitization furnace according to claim 5, characterized in that, The system includes a PLC controller, and both the first flow valve and the second flow valve are solenoid valves. Multiple solenoid valves and the thermocouple are electrically connected to the PLC controller.

7. The rapid cooling device for a graphitization furnace according to claim 1, characterized in that, The lower end of the jacket is provided with a return pipe, and the end of the return pipe extends to the water storage tank.

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