Cooling device for high-purity graphite preparation furnace

Abstract

The utility model discloses a cooling device for a high-purification graphite preparation furnace, and belongs to the technical field of graphite purification. A cooling device for a high-purification graphite preparation furnace comprises a workbench, a purification furnace and a fan assembly arranged in the purification furnace, and further comprises a purification cavity formed in the purification furnace and used for purifying graphite, an exhaust cavity formed in the purification furnace and used for exhausting gas in the purification cavity and an installation cavity formed in the purification furnace, a heat exchange box is fixedly mounted in the mounting cavity; two ends of the first air pipe are respectively connected with the exhaust cavity and the bottom of the side wall of the heat exchange box; according to the graphite powder purifying device, mixed gas (including protective gas and purified gas) in the purifying cavity is extracted through the fan assembly and fed into the heat exchange box to be cooled, and then the cooled gas is blown into the purifying cavity to be in direct contact with graphite powder, so that the cooling speed of the graphite powder can be remarkably increased, and the service life of the graphite powder is prolonged. The direct gas-solid heat exchange mode is faster and more efficient than a furnace body in heat transfer.

Description

Technical Field

[0001] The utility model relates to the technical field of graphite purification, in particular to a cooling device for a high-purity graphite preparation furnace. Background Art

[0002] After the graphite powder purification process is completed, the temperature inside the purification furnace is still very high. If the discharge operation is carried out directly, the high-temperature graphite powder may cause safety hazards to equipment and operators, and even cause serious consequences such as fire or explosion. Therefore, the purification furnace must be cooled by a cooling device to reduce the temperature inside the furnace to below the safety threshold.

[0003] The patent document with application number CN201610765796.9 announced an ultra-high temperature vacuum gas purification furnace system on 2018-06-26, including a purification furnace, a purification furnace support frame, a furnace bottom lifting mechanism, a vacuum subsystem, a process gas subsystem, a high and low temperature measurement and control conversion subsystem, a feeding trolley subsystem, an electrical control subsystem, a cooling water subsystem and a power subsystem; wherein the furnace cover, the furnace body and the furnace bottom are all closed structures with two inner and outer layers wrapping the middle cavity for circulating cooling water in the cavity between the inner and outer layers to cool the purification furnace, and the cavity in the furnace cover, the furnace body and the furnace bottom is connected to the cooling water subsystem through a water inlet pipe and a water outlet pipe to form a water cooling cycle. The cooling method of this technology is to set a cooling layer on the outer wall of the furnace cover, the furnace body and the furnace bottom. The principle is still to cool the material in the furnace body by heat transfer through the furnace body. This method has a low cooling rate and cannot achieve the purpose of rapid cooling of the material. Therefore, the cooling efficiency inside the purification furnace needs to be improved. For this reason, a cooling device for a high-purification graphite preparation furnace is proposed. Utility Model Content

[0004] The utility model is a cooling device for a high-purity graphite preparation furnace, which is proposed to solve the problem of slow cooling speed of graphite powder in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A cooling device for a high-purification graphite preparation furnace comprises a workbench, a purification furnace and a fan assembly arranged in the purification furnace, and also comprises: a purification chamber for purifying graphite is provided in the purification furnace, an exhaust chamber for exhausting gas in the purification chamber is provided in the purification furnace, an installation chamber is provided in the purification furnace, and a heat exchange box is fixedly installed in the installation chamber; a first air pipe, two ends of which are respectively connected to the exhaust chamber and the bottom of the side wall of the heat exchange box; a second air pipe, two ends of which are respectively connected to the air inlet end of the purification chamber and the exhaust end of the heat exchange box; a heat exchange assembly is arranged in the heat exchange box, and is used for heat exchange and cooling with purified gas and protective gas passing through the heat exchange box; the fan assembly extracts the protective gas and purified gas in the purification chamber and sends them into the heat exchange assembly for cooling, and sends the cooled protective gas and purified gas into the purification chamber; a preheating hopper is fixedly installed on the workbench, and is used for storing graphite to be purified; a heat storage assembly is fixedly installed in the preheating hopper, and is used for storing heat discharged by the heat exchange assembly and exchanging heat with the graphite to be purified.

[0007] As a preferred embodiment of the utility model: the heat exchange assembly includes a diverter box and a converging box fixedly installed in the heat exchange box, the output end of the diverter box and the input end of the converging box are fixedly installed with heat exchange tubes, the input end of the heat exchange box is fixedly connected with a water inlet pipe, the water inlet pipe is connected with the diverter box, and the output end of the converging box is fixedly installed with a drain pipe.

[0008] As a preferred embodiment of the present invention: multiple groups of the first air pipes and the second air pipes are provided, and are all distributed circumferentially on the heat exchange box, and the air inlet end of the second air pipe is provided on the top of the heat exchange box.

[0009] As a preferred embodiment of the utility model: the heat storage assembly includes a heat exchange cylinder, a heat conductive bracket is fixedly installed on the side wall of the heat exchange cylinder, the heat conductive bracket is fixedly connected to the preheating hopper, a heat storage block is arranged in the heat exchange cylinder, and an exhaust pipe is fixedly installed on the top of the heat exchange cylinder.

[0010] As a preferred embodiment of the utility model: a heat-conducting rod is fixedly installed at the bottom of the heat-conducting bracket, and the bottom of the heat-conducting rod is fixedly connected to the preheating hopper.

[0011] As a preferred embodiment of the present invention: the heat-conducting bracket is a pentagonal prism, and one side of the pentagonal prism is parallel to the ground.

[0012] As a preferred embodiment of the utility model: a mounting cylinder is fixedly installed on the bottom of the heat exchange cylinder, the top of the mounting cylinder is connected to the heat exchange cylinder, the output end of the drain pipe is fixedly connected to the side wall of the mounting cylinder, a mounting shaft is rotatably connected inside the mounting cylinder, a turbine blade is fixedly connected to the mounting shaft, and the bottom of the mounting shaft extends to the preheating hopper and is fixedly connected to a stirring rod.

[0013] As a preferred embodiment of the present invention: the heat storage block is one of heat storage ceramics and heat storage metals.

[0014] Compared with the prior art, the utility model provides a cooling device for a high-purity graphite preparation furnace, which has the following beneficial effects:

[0015] 1. The cooling device for the high-purification graphite preparation furnace extracts the mixed gas (including protective gas and purified gas) in the purification chamber through the fan assembly, and sends it into the heat exchange box for cooling, and then blows the cooled gas into the purification chamber to directly contact the graphite powder, which can significantly increase the cooling speed of the graphite powder. This direct gas-solid heat exchange method is faster and more efficient than the heat transfer of the furnace body;

[0016] 2. The cooling device for the high-purity graphite preparation furnace absorbs a large amount of heat energy during the cooling process through the heat exchange component. The water vapor formed by the evaporation of water is captured and stored by the heat storage component. Subsequently, the heat storage component conducts this part of the heat energy to the graphite powder in the preheating hopper, realizing energy recovery and reuse, and reducing the energy consumption of the entire preparation process;

[0017] 3. The cooling device used in the high-purity graphite preparation furnace uses the water vapor generated during the heat exchange process to drive the turbine to rotate, thereby driving the stirring rod to stir the graphite powder in the preheating hopper. This design not only realizes energy recovery, but also reduces the demand for external power and energy consumption. At the same time, the heat energy in the water vapor is absorbed and stored by the heat storage block and used to preheat the graphite powder, further improving the energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a high-purity graphite preparation furnace proposed in the utility model Figure 1 ;

[0019] Figure 2 A schematic diagram of the three-dimensional structure of a high-purity graphite preparation furnace proposed in the utility model Figure 2 ;

[0020] Figure 3 It is a partial cross-sectional view of a heat exchange box of a cooling device for a high-purity graphite preparation furnace proposed by the utility model;

[0021] Figure 4 This is a cross-sectional view of a cooling device for a high-purity graphite preparation furnace proposed by the utility model;

[0022] Figure 5 The utility model discloses a cross-sectional view of a preheating hopper of a cooling device for a high-purity graphite preparation furnace.

[0023] In the figure: 1. purification furnace; 2. purification chamber; 3. exhaust chamber; 4. first air pipe; 5. heat exchange box; 6. second air pipe; 7. diverter box; 8. heat exchange tube; 9. focusing box; 10. drain pipe; 11. water inlet pipe; 12. heat exchange cylinder; 13. workbench; 14. preheating hopper; 15. installation chamber; 16. exhaust pipe; 17. heat conduction bracket; 18. heat storage block; 19. installation cylinder; 20. installation shaft; 21. turbine blade; 22. stirring rod; 23. heat conduction rod. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] Example: Refer to Figure 1-Figure 5 A cooling device for a high-purification graphite preparation furnace comprises a workbench 13, a purification furnace 1 and a fan assembly arranged in the purification furnace 1, and further comprises: a purification chamber 2 for purifying graphite is provided in the purification furnace 1, an exhaust chamber 3 for exhausting gas in the purification chamber 2 is provided in the purification furnace 1, an installation chamber 15 is provided in the purification furnace 1, and a heat exchange box 5 is fixedly installed in the installation chamber 15; a first air pipe 4, both ends of which are respectively connected to the exhaust chamber 3 and the bottom of the side wall of the heat exchange box 5; a second air pipe 6, both ends of which are respectively connected to the air inlet end of the purification chamber 2 and the heat exchange box 5; The exhaust end of the box 5 is connected; the heat exchange component is arranged in the heat exchange box 5, and is used for heat exchange and cooling with the purified gas and protective gas passing through the heat exchange box 5; the fan component extracts the protective gas and purified gas in the purification chamber 2 and sends them into the heat exchange component for cooling, and sends the cooled protective gas and purified gas into the purification chamber 2; the preheating hopper 14 is fixedly installed on the workbench 13, and is used for storing the graphite to be purified; the heat storage component is fixedly installed in the preheating hopper 14, and is used for storing the heat discharged by the heat exchange component and exchanging heat with the graphite to be purified.

[0027] After the graphite powder is purified, the mixed gas of the protective gas and the purified gas inside the purification furnace 1 is circulated in the heat exchange box 5 and the purification chamber 2 through the gas circulation system in the purification furnace 1. The mixed gas exchanges heat with the heat exchange component for cooling during the flow, and then the graphite powder is blown into the purification chamber 2 to make the mixed gas fully contact with the graphite powder, thereby increasing the cooling rate of the graphite powder. After the heat exchange, the gas is heated up and enters the heat exchange box 5 again to exchange heat with the heat exchange component for cooling, and then enters the purification chamber 2 again to cool the graphite powder. The water in the heat exchange component absorbs heat and evaporates, and the water vapor formed by evaporation enters the heat storage component, absorbs the heat energy in the steam through the heat storage component and conducts it to the graphite powder in the preheating hopper 14 to preheat the graphite powder.

[0028] In summary, the mixed gas (including protective gas and purified gas) in the purification chamber 2 is extracted by the fan assembly and sent to the heat exchange box 5 for cooling, and then the cooled gas is blown into the purification chamber 2 to directly contact the graphite powder, which can significantly increase the cooling speed of the graphite powder. This direct gas-solid heat exchange method is faster and more efficient than the heat transfer of the furnace body.

[0029] Since the mixed gas is blown by the fan assembly in the purification chamber 2, a good airflow distribution is formed, so that the graphite powder can be evenly subjected to the cooling gas, avoiding the phenomenon of local overheating or overcooling, thereby ensuring the uniformity of the quality of the graphite powder;

[0030] The heat exchange component absorbs a large amount of heat energy during the cooling process. The water vapor formed by water evaporation is captured and stored by the heat storage component. Subsequently, the heat storage component conducts this part of heat energy to the graphite powder in the preheating hopper 14, realizing energy recovery and reuse and reducing the energy consumption of the entire preparation process.

[0031] Reference Figure 3-Figure 5The heat exchange assembly includes a flow divider box 7 and a flow collection box 9 fixedly installed in the heat exchange box 5. The output end of the flow divider box 7 and the input end of the flow collection box 9 are fixedly installed with a heat exchange pipe 8. The input end of the heat exchange box 5 is fixedly connected with a water inlet pipe 11, which is communicated with the flow divider box 7. The output end of the flow collection box 9 is fixedly installed with a drain pipe 10; the first air pipe 4 and the second air pipe 6 are both provided with multiple groups, and are all circumferentially distributed on the heat exchange box 5. The air inlet end of the second air pipe 6 is arranged on the top of the heat exchange box 5. The heat storage assembly includes a heat exchange cylinder 12, and a heat exchange tube 8 is fixedly installed on the side wall of the heat exchange cylinder 12. A heat-conducting bracket 17 is installed, which is fixedly connected to the preheating hopper 14. A heat storage block 18 is arranged in the heat exchange tube 12. An exhaust pipe 16 is fixedly installed on the top of the heat exchange tube 12. A mounting tube 19 is fixedly installed on the bottom of the heat exchange tube 12. The top of the mounting tube 19 is communicated with the heat exchange tube 12. The output end of the drain pipe 10 is fixedly connected to the side wall of the mounting tube 19. A mounting shaft 20 is rotatably connected in the mounting tube 19. A turbine blade 21 is fixedly connected to the mounting shaft 20. The bottom of the mounting shaft 20 extends to the preheating hopper 14 and is fixedly connected to a stirring rod 22.

[0032] When cooling, the fan assembly at the top of the purification furnace 1 works to absorb the mixed gas inside the purification furnace 1, and then discharges it into the heat exchange box 5 through the first air pipe 4 to exchange heat and cool the graphite powder with the heat exchange tube 8, and then enters the purification chamber 2 from the bottom of the purification chamber 2 through the second air pipe 6 to cool the graphite powder, and the water used to cool the mixed gas enters the diversion box 7 through the water inlet pipe 11 and is diverted into multiple heat exchange tubes 8 to exchange heat and evaporate with the mixed gas, and the water vapor is concentrated through the focusing box 9 and enters the installation cylinder 19 through the drain pipe 10 to drive the turbine blades 21 to rotate, and the turbine blades 21 drive the installation shaft 20 to rotate, and the installation shaft 20 rotates to stir the graphite powder in the preheating hopper 14 to make the graphite powder flow, and then the water vapor is discharged into the heat storage block 18, and the heat storage block 18 absorbs and stores heat energy. Finally, the water vapor is discharged through the exhaust pipe 16, and the heat energy stored in the heat storage block 18 is conducted to the graphite powder through the heat exchange cylinder 12 and the heat conductive bracket 17 to preheat the graphite powder.

[0033] In summary, the direct contact heat exchange between the heat exchange tube 8 and the mixed gas achieves efficient heat energy transfer, so that the mixed gas can be cooled quickly. This rapid cooling method helps to reduce the thermal stress of graphite powder during the purification process and improve product quality.

[0034] The water vapor generated during the heat exchange process is cleverly used to drive the turbine to rotate, thereby driving the stirring rod 22 to stir the graphite powder in the preheating hopper 14. This design not only realizes energy recovery, but also reduces the demand for external power and reduces energy consumption. At the same time, the heat energy in the water vapor is absorbed and stored by the heat storage block 18 and used to preheat the graphite powder, further improving the energy utilization efficiency.

[0035] The rotation of the stirring rod 22 promotes the flow and uniform heating of the graphite powder in the preheating hopper 14, so that the graphite powder can reach the required temperature more quickly before entering the purification chamber 2. This preheating method not only improves production efficiency, but also helps to reduce quality problems caused by uneven temperature.

[0036] Reference Figure 4 and Figure 5 Furthermore, a heat-conducting rod 23 is fixedly installed at the bottom of the heat-conducting bracket 17, and the bottom of the heat-conducting rod 23 is fixedly connected to the preheating hopper 14. The heat-conducting bracket 17 is a pentagonal prism, one side of which is parallel to the ground, and the cross-section of the heat-conducting bracket 17 is an equilateral pentagon. Through the cooperation of the heat-conducting rod 23 and the heat-conducting bracket 17, the contact surface with the graphite powder is increased, so as to facilitate better preheating of the graphite powder.

[0037] The heat storage block 18 is one of heat storage ceramics and heat storage metals, and is preferably heat storage ceramics in the present embodiment.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cooling device for a high-purity graphite preparation furnace, comprising a workbench (13), a purification furnace (1), and a fan assembly arranged in the purification furnace (1), characterized in that: Also includes: The purification furnace (1) is provided with a purification chamber (2) for purifying graphite, the purification furnace (1) is provided with an exhaust chamber (3) for exhausting gas in the purification chamber (2), the purification furnace (1) is provided with an installation chamber (15), and a heat exchange box (5) is fixedly installed in the installation chamber (15); The first air pipe (4) has two ends connected to the exhaust chamber (3) and the bottom of the side wall of the heat exchange box (5) respectively; The second air pipe (6) has two ends respectively connected to the air inlet end of the purification chamber (2) and the air outlet end of the heat exchange box (5); A heat exchange component is arranged in the heat exchange box (5) and is used for exchanging heat and cooling the purified gas and the protective gas passing through the heat exchange box (5); The fan component extracts the protective gas and the purified gas in the purification chamber (2) and sends them to the heat exchange component for cooling, and then sends the cooled protective gas and the purified gas into the purification chamber (2); A preheating hopper (14), fixedly mounted on the workbench (13), for storing graphite to be purified; The heat storage component is fixedly installed in the preheating hopper (14) and is used to store the heat discharged by the heat exchange component and to exchange heat with the graphite to be purified.

2. The cooling device for a high-purity graphite preparation furnace according to claim 1, characterized in that: The heat exchange assembly comprises a flow distribution box (7) and a flow collection box (9) fixedly installed in the heat exchange box (5); a heat exchange pipe (8) is fixedly installed at the output end of the flow distribution box (7) and the input end of the flow collection box (9); the input end of the heat exchange box (5) is fixedly connected to a water inlet pipe (11), the water inlet pipe (11) is in communication with the flow distribution box (7); and a drainage pipe (10) is fixedly installed at the output end of the flow collection box (9).

3. The cooling device for a high-purity graphite preparation furnace according to claim 1, characterized in that: The first air pipe (4) and the second air pipe (6) are both provided in multiple groups and are all distributed circumferentially on the heat exchange box (5); the air inlet end of the second air pipe (6) is provided at the top of the heat exchange box (5).

4. The cooling device for a high-purity graphite preparation furnace according to claim 2, characterized in that: The heat storage assembly comprises a heat exchange cylinder (12), a heat conductive bracket (17) is fixedly mounted on the side wall of the heat exchange cylinder (12), the heat conductive bracket (17) is fixedly connected to the preheating hopper (14), a heat storage block (18) is arranged in the heat exchange cylinder (12), and an exhaust pipe (16) is fixedly mounted on the top of the heat exchange cylinder (12).

5. The cooling device for a high-purity graphite preparation furnace according to claim 4, characterized in that: A heat-conducting rod (23) is fixedly mounted on the bottom of the heat-conducting bracket (17), and the bottom of the heat-conducting rod (23) is fixedly connected to the preheating hopper (14).

6. The cooling device for a high-purity graphite preparation furnace according to claim 4, characterized in that: The heat-conducting support (17) is a pentagonal prism, one side of which is parallel to the ground.

7. A cooling device for a high-purity graphite preparation furnace according to claim 4, characterized in that: A mounting cylinder (19) is fixedly mounted at the bottom of the heat exchange cylinder (12); the top of the mounting cylinder (19) is in communication with the heat exchange cylinder (12); the output end of the drain pipe (10) is fixedly connected to the side wall of the mounting cylinder (19); a mounting shaft (20) is rotatably connected inside the mounting cylinder (19); a turbine blade (21) is fixedly connected to the mounting shaft (20); and the bottom of the mounting shaft (20) extends to the preheating hopper (14) and is fixedly connected to a stirring rod (22).

8. The cooling device for a high-purity graphite preparation furnace according to claim 4, characterized in that: The heat storage block (18) is one of heat storage ceramics and heat storage metals.

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