Temperature control type graphite sintering furnace

Abstract

The invention is suitable for the technical field of sintering furnaces, and provides a temperature control type graphite sintering furnace which comprises a furnace body and a condenser, an air inlet of the condenser is communicated with a filter box through a transverse pipe, a filter structure for purifying flue gas is arranged in an inner cavity of the filter box, the surface of the filter box is communicated with the inner cavity of the furnace body through a communicating pipe, and the surface of the filter box is communicated with the inner cavity of the furnace body through a communicating pipe. The end, close to the filter box, of the top of the communicating pipe is fixedly connected with a shell. According to the temperature control type graphite sintering furnace, after a motor works, a rotating rod can be driven to rotate, a transmission rod is driven to rotate, then fan blades are driven to rotate, airflow in an inner cavity of a communicating pipe is pumped into an inner cavity of a filter box, negative pressure is generated in the communicating pipe, and then tail gas in an inner cavity of the furnace body is pumped; influence of high-temperature tail gas on the motor is avoided, protection on the motor is improved, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of sintering furnaces, and in particular relates to a temperature-controlled graphite sintering furnace. Background Art

[0002] Graphite sintering furnace is a kind of equipment specially used for sintering and graphitization of carbon materials. Its main function is to heat treat the carbon roasted products at high temperature (usually at 2000-3000℃) to make the carbon atoms recrystallize and rearrange in order, thereby converting them into artificial graphite products; such high temperature treatment process can make the carbon material present the crystal structure of graphite, improve its physical and mechanical properties, and thus broaden the application range of graphite products.

[0003] In the prior art, such as the square heating zone graphite sintering furnace disclosed in patent CN220708119U, this technical solution starts the condenser and the motor when the graphite sintering furnace discharges flue gas, so that the output end of the motor drives the fan shaft and the fan blades to rotate after starting, so that the rotating fan blades generate wind force, accelerate the speed of exhaust gas discharge from the graphite sintering furnace, and transport the flue gas into the filter box through the exhaust pipe and the air supply pipe, and then pass through the activated carbon filter plate in the filter box, so that the activated carbon filter plate filters impurities in the flue gas, and the filtered flue gas is then transported into the condenser through the air supply pipe.

[0004] However, the above-mentioned graphite sintering furnace cannot control the sintering temperature, while the graphitization process requires proper control of the combustion temperature, and different graphite products have different temperature requirements, otherwise the product cannot be fully graphitized. In addition, during the use of the existing graphite sintering furnace, the motor driving the fan shaft is set inside the pipeline, and the exhaust gas carries a high heat, which is easy to accelerate the aging rate of the motor inside the pipeline, thereby shortening the service life of the motor and increasing the maintenance cost of the temperature-controlled graphite sintering furnace. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a temperature-controlled graphite sintering furnace, comprising a furnace body, a condenser and a filter box, the air outlet of the furnace body is connected to the filter box through an exhaust pipe, and the other end of the filter box is connected to the condenser, a conveyor chain is provided on the bottom side of the furnace body, the conveyor chain is connected to the first motor in terms of transmission, the first motor is arranged in a heat insulation box, a transmission shaft thereof extends out of the heat insulation box and is connected to the conveyor chain in terms of transmission through a first bevel gear group, a first air supply pipe, a second air supply pipe and a third air supply pipe are respectively provided on the top side of the furnace body from top to bottom, a first combustion nozzle is provided at the bottom of the first air supply pipe, a second combustion nozzle is provided at the bottom of the second air supply pipe, and a third combustion nozzle is provided at the bottom of the third air supply pipe, and an inlet and outlet door is provided on one side of the furnace body.

[0006] Preferably, the flame temperature of the first combustion nozzle is 1000-1500°C, the flame temperature of the second combustion nozzle is 1800-2300°C, and the flame temperature of the third combustion nozzle is 2500-3000°C.

[0007] Preferably, an inspection door is provided on the other side of the furnace body.

[0008] Preferably, a second motor is provided on the exhaust pipe on the front side of the filter box, the bottom output shaft of the second motor is transmission-connected to a second bevel gear group arranged in the exhaust pipe, and the other end of the second bevel gear group is connected to an exhaust fan via a transmission shaft.

[0009] Preferably, a protective shell is provided on the outside of the second motor, and heat-insulating rock wool is provided on the bottom of the protective shell between the second motor and the exhaust pipe.

[0010] Preferably, a filter element for purifying smoke is arranged inside the filter box.

[0011] Beneficial Effects

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The conveyor chain and the first motor arranged inside the furnace body drive the graphite product to move in the furnace body, and the graphite product is sintered through the first combustion nozzle, the second combustion nozzle and the third combustion nozzle with different combustion temperatures respectively, so as to realize calcination at different temperatures, which is helpful to improve the graphitization effect; Second, the exhaust fan is driven to rotate by the second motor to extract the combustion exhaust gas inside the furnace body, and the second motor is placed outside the exhaust pipe to avoid the influence of high-temperature exhaust gas on it, thereby extending the service life of the second motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure inside the furnace body of the present invention; Figure 3 It is a schematic diagram of the local structure of the present invention.

[0014] In the figure: 1. furnace body; 2. condenser; 3. filter box; 4. exhaust pipe; 5. conveyor chain; 6. first motor; 7. heat insulation box; 8. first bevel gear group; 9. first air supply pipe; 10. second air supply pipe; 11. third air supply pipe; 12. first combustion nozzle; 13. second combustion nozzle; 14. third combustion nozzle; 15. inlet and outlet door; 16. inspection door; 17. second motor; 18. second bevel gear group; 19. transmission shaft; 20. exhaust fan; 21. protective shell; 22. thermal insulation rock wool; 23. filter element. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] See also Figure 1-3 As shown, the temperature-controlled graphite sintering furnace in this embodiment includes a furnace body 1, a condenser 2 and a filter box 3. The air outlet of the furnace body 1 is connected to the filter box 3 through an exhaust pipe 4, and the other end of the filter box 3 is connected to the condenser 2. The high-temperature exhaust gas generated after the combustion of the furnace body 1 is filtered through the filter box 3 and then discharged after being cooled by the condenser 2.

[0017] A conveyor chain 5 is provided at the bottom of the furnace body 1, and the conveyor chain 5 is transmission-connected to a first motor 6. The first motor 6 is arranged in a heat-insulating box 7, and a transmission shaft thereof extends from the heat-insulating box 7 and is transmission-connected to the conveyor chain 5 through a first bevel gear set 8. Among them, the conveyor chain 5, the heat-insulating box 7, the first bevel gear set 8 and other structures are all made of high-temperature resistant materials (such as silicon carbide, zirconium oxide, etc.).

[0018] A first gas supply pipe 9, a second gas supply pipe 10 and a third gas supply pipe 11 are respectively provided on the top side of the furnace body 1 from top to bottom, all of which are made of heat-insulating and flame-retardant materials, such as ceramic fiber, mineral rock wool, silicon carbide, etc.; a first combustion nozzle 12 is provided at the bottom of the first gas supply pipe 9, a second combustion nozzle 13 is provided at the bottom of the second gas supply pipe 10, and a third combustion nozzle 14 is provided at the bottom of the third gas supply pipe 11. Gas fuel, such as hydrogen-oxygen mixture, oxygen-acetylene mixture, etc., is increased for the three combustion nozzles through the above three gas supply pipes.

[0019] The flame temperature of the first combustion nozzle 12 is 1000-1500°C, and the graphite product can be initially heated through the first combustion nozzle 12; the flame temperature of the second combustion nozzle 13 is 1800-2300°C, and the graphite product can be carbonized through the second combustion nozzle 13, causing a critical change in the microcrystalline structure of carbon atoms; the flame temperature of the third combustion nozzle 14 is 2500-3000°C, and the graphite product can be finally graphitized through the third combustion nozzle 14, so that the microcrystalline carbon network is transformed from a disordered two-dimensional structure to an ordered three-dimensional structure.

[0020] A material inlet and outlet door 15 is provided on one side of the furnace body 1 for taking graphite products into and out of the furnace; an inspection door 16 is provided on the other side of the furnace body 1 for inspecting the internal structure of the furnace body 1 .

[0021] A second motor 17 is provided on the exhaust pipe 4 at the front side of the filter box 3. The output shaft at the bottom of the second motor 17 is transmission-connected to a second bevel gear set 18 disposed in the exhaust pipe 4. The other end of the second bevel gear set 18 is connected to an exhaust fan 20 via a transmission shaft 19. The second motor 17 drives the second bevel gear set 18 to work, thereby driving the exhaust fan 20 to work, and extracting the exhaust gas after combustion inside the furnace body 1.

[0022] A protective shell 21 is provided on the outside of the second motor 17, and a heat-insulating rock wool 22 is provided on the bottom of the protective shell 21 between the second motor 17 and the exhaust pipe 4, which is used to block the heat of the exhaust pipe 4 from being transferred to the second motor 17, thereby protecting the second motor 17, preventing high temperature from affecting the normal operation of the second motor 17, and extending its service life.

[0023] A filter element 23 for purifying flue gas is arranged inside the filter box 3. The exhaust gas enters the condenser 2 after being purified by the filter element 23, and is discharged after heat exchange treatment. Among them, the filter element 23 and the condenser 2 both adopt conventional technical means in this field, which will not be repeated here.

[0024] Compared with the prior art, the present invention has the following beneficial effects: 1. The conveyor chain 5 and the first motor 6 provided inside the furnace body 1 drive the graphite product to move in the furnace body 1, and the graphite product is sintered by the first combustion nozzle 12, the second combustion nozzle 13 and the third combustion nozzle 14 with different combustion temperatures respectively, so as to realize calcination at different temperatures, which is helpful to improve the graphitization effect; Second, the exhaust fan 20 is driven to rotate by the second motor 17 to extract the combustion exhaust gas inside the furnace body 1, and the second motor 17 is placed outside the exhaust pipe 4 to avoid the influence of high-temperature exhaust gas on it, thereby extending the service life of the second motor 17.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature-controlled graphite sintering furnace, characterized in that: The invention comprises a furnace body (1), a condenser (2) and a filter box (3), wherein an air outlet of the furnace body (1) is connected to the filter box (3) via an exhaust pipe (4), and the other end of the filter box (3) is connected to the condenser (2). A conveyor chain (5) is provided on the bottom side of the furnace body (1), and the conveyor chain (5) is connected to a first motor (6) in a transmission manner. The first motor (6) is arranged in a heat-insulating box (7), and a transmission shaft thereof extends out of the heat-insulating box (7) and is connected to the conveyor chain (5) in a transmission manner via a first bevel gear group (8). A first air supply pipe (9), a second air supply pipe (10) and a third air supply pipe (11) are respectively provided on the top side of the furnace body (1) from top to bottom. A first combustion nozzle (12) is provided at the bottom of the first air supply pipe (9), a second combustion nozzle (13) is provided at the bottom of the second air supply pipe (10), and a third combustion nozzle (14) is provided at the bottom of the third air supply pipe (11). A material inlet and outlet door (15) is provided on one side of the furnace body (1).

2. A temperature-controlled graphite sintering furnace as claimed in claim 1, characterized in that: The flame temperature of the first combustion nozzle (12) is 1000-1500°C, the flame temperature of the second combustion nozzle (13) is 1800-2300°C, and the flame temperature of the third combustion nozzle (14) is 2500-3000°C.

3. A temperature-controlled graphite sintering furnace as claimed in claim 1, characterized in that: An inspection door (16) is provided on the other side of the furnace body (1).

4. A temperature-controlled graphite sintering furnace as claimed in claim 1, characterized in that: A second motor (17) is provided on the exhaust pipe (4) on the front side of the filter box (3); an output shaft at the bottom of the second motor (17) is transmission-connected to a second bevel gear group (18) disposed in the exhaust pipe (4); and the other end of the second bevel gear group (18) is connected to an exhaust fan (20) via a transmission shaft (19).

5. A temperature-controlled graphite sintering furnace as claimed in claim 4, characterized in that: A protective shell (21) is provided on the outside of the second motor (17), and a heat-insulating rock wool (22) is provided on the bottom of the protective shell (21) at a position between the second motor (17) and the exhaust pipe (4).

6. A temperature-controlled graphite sintering furnace as claimed in claim 1, characterized in that: A filter element (23) for purifying smoke is arranged inside the filter box (3).

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