Spiral discharging and degassing device for graphite furnace filler

Abstract

The utility model relates to a kind of spiral discharging and degassing device for graphitization furnace filling, including the buffer bin for buffering material being arranged above graphitization furnace, the feed pipe being provided on buffer bin and being communicated with buffer bin inner chamber, the discharge outlet of buffer bin lower end is connected with vertically downward arrangement's discharging pipe, discharging pipe is worn with the discharging spiral that can rotate relative to discharging pipe, driving device is set on buffer bin and drives discharging spiral rotation, discharging pipe includes the discharging pipe and degassing pipe with sequentially communicated from top to bottom, discharging pipe upper end is connected with the discharge outlet of buffer bin lower end, the upper end of degassing pipe is connected with the lower end of discharging pipe, and degassing pipe is provided with the exhaust pipe being communicated with degassing pipe inner chamber.This utility model adopts spiral extrusion mode to convey material into graphitization furnace, and air in material is discharged through degassing pipe in spiral extrusion process, so that the material is compacted, dust pollution is reduced, and filling quality is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of graphitization furnace charging equipment, specifically relating to a spiral unloading and degassing device for graphitization furnace packing. Background Technology

[0002] Graphitization furnaces are core thermal equipment for achieving the key conversion of carbon to graphite. They are widely used in the production of high-end products such as lithium battery anode materials, photovoltaic thermal field materials, and ultra-high power graphite electrodes, and are an important infrastructure for promoting the upgrading of new energy and new materials industries.

[0003] Graphitization furnaces typically have a rectangular furnace body constructed of refractory material. Inside the furnace body is a furnace chamber filled with resistance material. A crucible for filling carbon powder is embedded within the resistance material. The top of the furnace chamber is covered with resistance material and insulating material. Conductive electrode rods connected to a power source are installed at both ends of the furnace body. When the circuit is turned on, the resistance material inside the furnace chamber heats up, thereby heating the carbon powder material in the crucible and converting the carbon powder material into graphite.

[0004] When using a graphitization furnace, it is necessary to first fill the furnace chamber with resistance material, carbon powder, and insulation material. The resistance material in the furnace chamber can be used multiple times after a single filling, with a low replacement frequency and easy filling. However, the carbon powder in the crucible and the resistance material and insulation material on the top of the furnace body require frequent filling and are more difficult to fill. Currently, manual filling is commonly used. This involves using overhead cranes to transport materials to the filling area in ton bags, then cutting the bags open and manually pushing the materials to the appropriate areas. This method is inefficient, labor-intensive, generates significant dust pollution, causes frequent damage to ton bags, and results in high production costs. Furthermore, manual filling is prone to uneven and loose filling, leading to poor filling quality. Utility Model Content

[0005] In summary, in order to overcome the shortcomings of the existing technology, this utility model provides a screw unloading and degassing device for graphitization furnace packing. The device uses a screw extrusion method to transport materials into the graphitization furnace, and at the same time, air in the material is discharged through the degassing pipe during the screw extrusion process, so that the packed material is compacted, dust pollution is reduced, and the packing quality is improved.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: A screw unloading and degassing device for graphitization furnace packing includes: a buffer chamber for buffering materials disposed above the graphitization furnace; a feed pipe communicating with the inner cavity of the buffer chamber; a discharge port at the lower end of the buffer chamber connected to a vertically downward-arranged discharge pipe; a discharge screw capable of rotating relative to the discharge pipe being installed inside the discharge pipe; a drive device for driving the discharge screw to rotate on the buffer chamber; the discharge pipe including a discharge pipe and a degassing pipe connected sequentially from top to bottom; the upper end of the discharge pipe connected to the lower discharge port of the buffer chamber; the lower end of the discharge pipe connected to the upper end of the degassing pipe; and an exhaust pipe communicating with the inner cavity of the degassing pipe.

[0007] Furthermore, a vibration assembly is provided on the buffer chamber and / or the unloading pipe.

[0008] Furthermore, the lower end of the unloading screw is connected to the lower end of the unloading pipe, and the upper end of the unloading screw passes through the buffer chamber and is connected to the driving device located at the upper end of the buffer chamber. The driving device drives the unloading screw to rotate.

[0009] Furthermore, the unloading pipe includes at least one discharge pipe and at least one degassing pipe. All discharge pipes are connected in sequence and then connected in sequence to the degassing pipe. The lower end of the last degassing pipe is provided with a support for supporting the unloading screw.

[0010] Furthermore, the degassing pipe includes an inner filter pipe, a middle filter pipe, and an outer pipe arranged sequentially from the inside to the outside. The filter hole diameter of the inner filter pipe is larger than that of the middle filter pipe. There is a gap between the outer pipe and the middle filter pipe. The exhaust pipe is installed on the outer pipe, and the inner cavity of the exhaust pipe is connected to the gap between the outer pipe and the middle filter pipe and the atmosphere.

[0011] Furthermore, one end of the exhaust pipe is connected to the outer pipe, and the other end of the exhaust pipe is bent upwards to discharge air.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The frame of this utility model uses a spiral extrusion method to transport materials into the graphitization furnace. At the same time, during the spiral extrusion process, the air in the material is discharged through the degassing pipe, which makes the filled material compact, reduces dust pollution, and improves the filling quality.

[0014] 2. This invention utilizes the rotation of the unloading screw to push and compress powdery materials, thus compacting loose materials and ensuring density. This improves the compactness of the material entering the graphitization furnace, enhancing the filling quality. Simultaneously, the unloading pipe of this invention features a degassing pipe. During the material pushing process, air in the material is discharged through the degassing pipe under the pushing and compressing action, preventing air from entering the graphitization furnace and further increasing the compactness of the material entering the furnace. The degassing pipe contains an inner screen and a middle screen. When exhausting gas, the gas passes through both the inner and middle screens for double-layer filtration, effectively removing dust from the discharged gas, reducing dust spillage and pollution.

[0015] 3. The unloading pipe and / or buffer hopper of this utility model are equipped with a vibration component. Vibration can make the material in the buffer hopper and unloading pipe fall smoothly, avoiding material retention in the buffer hopper and unloading pipe. At the same time, vibration can also prevent the material in the buffer hopper and unloading pipe from clumping. When the vibration component is set at the lower end of the unloading pipe, the vibration of the vibration component can be transmitted to the material already filled in the graphitization furnace. This vibration can compact the material and improve the compactness of the material filling.

[0016] 4. This utility model has a simple structure, is easy to use, has low cost, and is easy to operate. It can effectively realize the material filling of the graphitization furnace, reduce the labor intensity during the filling process, improve the filling efficiency, ensure the filling quality, and at the same time reduce dust overflow and protect the environment. Attached Figure Description

[0017] Figure 1 A schematic diagram of the packing device for a graphitization furnace; Figure 2 for Figure 1 A schematic diagram of the left-side view structure; Figure 3 A schematic diagram of the structure of the buffer chamber, unloading pipe, and unloading screw of the graphitization furnace packing device; Figure 4 for Figure 3 A schematic diagram of the left-side view structure; Figure 5 A three-dimensional structural diagram of the buffer chamber of the graphitization furnace packing device; Figure 6 A cross-sectional schematic diagram of the degassing pipe of the graphitization furnace packing device; Figure 7 A schematic diagram of the dust collector in the graphitization furnace packing device; Figure 8 for Figure 7 A schematic diagram of the left-side view structure; Figure 9This is a cross-sectional schematic diagram of the dust collector for the graphitization furnace packing device.

[0018] Graphitization furnace 1, bridge frame 2, trolley 3, trolley 4, hopper 5, buffer hopper 6, feed pipe 7, discharge pipe 8, discharge screw 9, drive device 10, vibration assembly 11, exhaust pipe 12, dust collector 13, vacuum pump 14, exhaust valve 15, lifting hydraulic cylinder 16, distance sensor 17, barrel 61, platform base 62, discharge hopper 63, discharge pipe 81, degassing pipe 82, exhaust pipe 83, inner filter pipe 821, middle filter pipe 822, outer pipe 823, dust collector cylinder 131, baffle 132, exhaust chamber 133, dust collection chamber 134, filter cartridge 135, backflush pipe 136, backflush valve 137, exhaust pipe 138. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] like Figures 1-9 As shown, a negative pressure system for graphitization furnace packing includes: a bridge frame 2 mounted on the graphitization furnace 1 along its length; a large trolley 3 mounted on the bridge frame 2 that moves along the length of the graphitization furnace 1; a small trolley 4 mounted on the large trolley 3 and moving along the width of the graphitization furnace 1; a hopper 5 mounted on the small trolley 4; a buffer chamber 6 suspended on the small trolley 4; and a lifting hydraulic cylinder 16 mounted on the small trolley 4. The telescopic rod of the lifting hydraulic cylinder 16 is connected to the buffer chamber 6, and the vertical movement of the buffer chamber 6 relative to the small trolley 4 is achieved by the extension and retraction of the telescopic rod. In practice, four lifting hydraulic cylinders 16 can be mounted on the small trolley 4, and the telescopic rods of the four lifting hydraulic cylinders 16 are respectively connected to the four corners of the upper end of the buffer chamber 6, with the telescopic rods of the four lifting hydraulic cylinders 16 extending and retracting synchronously. The lifting hydraulic cylinder 16 drives the buffer chamber 6 to move up and down relative to the trolley 4. When loading materials into the graphitization furnace 1, the buffer chamber 6 moves downward so that the lower end of the unloading pipe 8 under the buffer chamber 6 is as close as possible to the loading position of the graphitization furnace 1, thereby reducing the falling height of the material into the graphitization furnace 1, reducing dust generated by the falling impact, and reducing dust pollution.

[0021] The buffer chamber 6 includes a barrel 61, a platform base 62 fixedly connected to the upper end of the barrel 61, and a funnel-shaped discharge hopper 63 fixedly connected to the lower end of the barrel 61. The platform base 62 has an inlet communicating with the inner cavity of the barrel 61. The inlet is connected to the lower end of the feed pipe 7. The upper end of the feed pipe 7 is connected to the lower discharge port of the hopper 5 via a telescopic pipe. A closed-loop unloader and a discharge valve are installed at the lower discharge port of the hopper 5. The lower end of the discharge hopper 63 has the discharge port of the buffer chamber 6, which is connected to the discharge pipe 8. The material in the hopper 5 first enters the buffer chamber 6 for buffering, and then enters the graphitization furnace 1 along the discharge pipe 8. The buffer chamber 6 ensures the continuity of material loading into the graphitization furnace 1. The funnel-shaped discharge hopper 63 guides the material in the buffer chamber 6 to the discharge pipe 8, ensuring that the material can smoothly enter the graphitization furnace 1 along the discharge pipe 8.

[0022] In implementation, two parallel funnel-shaped discharge hoppers 63 can be installed at the lower end of the barrel 61, and the discharge ports of the two discharge hoppers 63 are respectively connected to two discharge pipes 8. A vibration assembly 11 is installed on the buffer chamber 6 and / or the discharge pipe 8. In implementation, the vibration assembly 11 is a hydraulic high-frequency vibrator. Vibration allows the material in the buffer chamber 6 and the discharge pipe 8 to fall smoothly, preventing material retention in the buffer chamber 6 and the discharge pipe 8. Vibration also prevents the material in the buffer chamber 6 and the discharge pipe 8 from clumping. When the vibration assembly 11 is installed at the lower end of the discharge pipe 8, the vibration of the vibration assembly 11 can be transmitted to the material already loaded in the graphitization furnace 1. This vibration can compact the loaded material, improving the compactness of the material loading. A distance sensor 17 is installed at the lower end of the unloading pipe 8. The distance sensor 17 is used to detect the distance between the lower end of the unloading pipe 8 and the material filling surface inside the graphitization furnace 1. When the buffer chamber 6 moves downward, the distance detection helps to prevent the unloading pipe 8 from colliding with the graphitization furnace 1. At the same time, it can also provide a suitable falling height for the material and reduce the dust generated by the impact of the falling material.

[0023] A discharge screw 9, capable of rotating relative to the discharge pipe 8, is installed inside the discharge pipe 8. The lower end of the discharge screw 9 is connected to the lower end of the discharge pipe 8 and can rotate relative to the discharge pipe 8. The discharge screw 9 is arranged along the discharge pipe 8, and its upper end passes through the buffer chamber 6 and is connected to the drive device 10 located at the upper end of the buffer chamber 6. The rotation of the discharge screw 9 pushes and compresses the powdery material, making the loose material compacted, thereby making the material entering the graphitization furnace 1 denser, improving the compactness of the material filled into the graphitization furnace 1, and improving the filling quality.

[0024] The unloading pipe 8 includes a discharge pipe 81 and a degassing pipe 82 connected in sequence. The upper end of the discharge pipe 81 is connected to the lower discharge port of the buffer chamber 6, and the lower end of the discharge pipe 81 is connected to the upper end of the degassing pipe 82. The degassing pipe 82 includes an inner filter pipe 821, a middle filter pipe 822, and an outer pipe 823 arranged in sequence from the inside to the outside. The diameter of the filter holes in the inner filter pipe 821 is larger than that in the middle filter pipe 822. There is a gap between the outer pipe 823 and the middle filter pipe 822. An exhaust pipe 83 is provided on the outer pipe 823, communicating with the gap. The exhaust pipe 83 is located on the outer pipe 823, and its inner cavity communicates with the gap between the outer pipe 823 and the middle filter pipe 822 and the atmosphere. One end of the exhaust pipe 83 is connected to the outer pipe 823, and the other end of the exhaust pipe 83 is bent upwards to discharge air. During the material conveying process, the unloading screw 9 discharges air from the material through the degassing pipe 82 under the pushing and squeezing action. This prevents air from entering the graphitization furnace 1 and improves the compactness of the material entering the graphitization furnace 1. The degassing pipe 82 has an inner screen pipe 821 and a middle screen pipe 822. When the degassing pipe 82 exhausts gas, the gas passes through the inner screen pipe 821 and the middle screen pipe 822 for double-layer filtration, which can effectively remove dust from the discharged gas, reduce dust overflow, and reduce dust pollution.

[0025] In implementation, the unloading pipe 8 includes a discharge pipe 81 and two degassing pipes 82. The upper end of the discharge pipe 81 is connected to the discharge port at the lower end of the discharge hopper 63 of the buffer chamber 6. The lower end of the discharge pipe 81 is connected to the upper end of the first degassing pipe 82. The lower end of the first degassing pipe 82 is connected to the upper end of the second degassing pipe 82. The lower end of the second degassing pipe 82 is connected to a vibrating plate. The lower end of the inner cavity of the second degassing pipe 82 is provided with a support for supporting the unloading screw 9. The lower end of the unloading screw 9 is connected to the support and can rotate relative to the support.

[0026] The buffer chamber 6 is equipped with an exhaust pipe 12 that connects to the inner cavity of the buffer chamber 6. One end of the exhaust pipe 12 is connected to the buffer chamber 6, and the other end is connected to the air inlet of the dust collector 13. An exhaust valve 15 is installed on the exhaust pipe 12. The air outlet of the dust collector 13 is connected to the air inlet of the vacuum pump 14 through an air outlet pipe 138, and the air outlet of the vacuum pump 14 is vented. The vacuum pump 14 is a waterless vacuum pump. The dust collector 13 includes a hollow dust collector cylinder 131. A partition 132 is provided inside the dust collector cylinder 131, which divides the inner cavity of the dust collector cylinder 131 into an air outlet chamber 133 located above the partition 132 and a dust collection chamber 134 located below the partition 132. A filter cartridge 135 is suspended on the partition 132. The dust collection chamber 134 and the air outlet chamber 133 are connected through the inner cavity of the filter cartridge 135 and the filter holes. The air inlet of the dust collector 13 is connected to the dust collection chamber 134, and the air outlet pipe 138 is connected to the air outlet chamber 133. The dust collector cylinder 131 is provided with a backflush pipe 136. One end of the backflush pipe 136 is located in the air outlet chamber 133 and inserted into the filter cartridge 135. The other end of the backflush pipe 136 is located outside the dust collector cylinder 131 and is connected to the air outlet of the backflush pump. The air inlet of the backflush pump is connected to the atmosphere. The backflush pipe 136 is provided with a backflush valve 137, which is a pulse solenoid valve.

[0027] In use, start the large trolley 3 and the small trolley 4 to move the unloading pipe 8 directly above the filling part of the graphitization furnace 1. Then start the lifting hydraulic cylinder 16 on the small trolley 4. The telescopic rod of the lifting hydraulic cylinder 16 extends and pushes the buffer chamber 6 downward, thereby moving the unloading pipe 8 downward so that the lower end outlet of the unloading pipe 8 is close to the filling part. The distance sensor 17 at the lower end of the unloading pipe 8 monitors the distance between the lower end of the unloading pipe 8 and the filling part. When the unloading pipe 8 moves downward into place, stop the lifting hydraulic cylinder 16 and maintain the height.

[0028] Start the vacuum pump 14 to extract negative pressure from the buffer chamber 6 and the discharge pipe 8. Open the discharge valve on the lower outlet of the silo 5 and start the windproof discharger. The powdery material in the silo 5 enters the buffer chamber 6 along the feed pipe 7, and then enters the discharge pipe 8 along the funnel-shaped discharge hopper 63. The funnel-shaped structure of the discharge hopper 63 activates the drive device 10 at the upper end of the buffer chamber 6 and starts the vibration assembly 11. The drive device 10 drives the discharge screw 9 to rotate. The powdery material in the buffer chamber 6 moves downward along the discharge pipe 8 under the pushing action of the discharge screw 9. During the pushing process, the spiral blades of the discharge screw 9 compress the material. The material is made denser. As the material is pushed downward along the discharge pipe 8, it passes through the degassing pipe 82. Under the squeezing action of the discharge screw 9, the air in the material passes through the sieve holes of the inner screen pipe 821 and the middle screen pipe 822 of the degassing pipe 82, and enters the gap between the middle screen pipe 822 and the outer pipe 823. Then it is discharged through the exhaust pipe 83. When the air passes through the inner screen pipe 821 and the middle screen pipe 822, the inner screen pipe 821 and the middle screen pipe 822 filter the discharged air. Through double-layer filtration, the dust material in the discharged gas can be effectively removed, reducing the overflow of dust material and reducing dust pollution. The degassed material flows out from the lower opening of the discharge pipe 8 and enters the graphitization furnace 1, realizing the material loading of the graphitization furnace 1. The moving trolley 3 and the moving trolley 4 make the discharge pipe 8 move along the length and width of the graphitization furnace 1, continuously loading material into the graphitization furnace 1.

[0029] During the process of vacuum pump 14 extracting negative pressure in buffer chamber 6 and unloading pipe 8, some powdery material enters dust collector 13 along with air through suction pipe 12. After the powdery material is filtered by filter cartridge 135 in dust collector 13, clean air enters outlet chamber 133 and is then discharged through outlet port and outlet pipe 138 of dust collector 13. When the filter holes of filter cartridge 135 are blocked by material, backflush pump is started, backflush valve 137 is opened, and air is blown into filter cartridge 135 through backflush pipe 136 to backflush the sieve holes of filter cartridge 135. The powdery material filtered by filter cartridge 135 and the backflush powdery material settle in dust collection chamber 134 and fall back into buffer chamber 6 along suction pipe 12.

[0030] After the material in graphitization furnace 1 is filled, turn off the drive device 10, turn off the vacuum pump 14 and the vibration assembly 11, and then remove the trolley 3 and the trolley 4.

[0031] In the implementation of this utility model, it is not necessary to install the bridge frame 2 on the graphitization furnace 1. Instead, the trolley 3 can be moved by the overhead crane installed in the workshop to move the unloading pipe 8 along the length and width of the graphitization furnace 1.

[0032] It should be noted that the above-described embodiments are illustrative of the technical solution of this utility model and not limiting. Equivalent substitutions or other modifications made by those skilled in the art based on the prior art, as long as they do not exceed the concept and scope of the technical solution of this utility model, should be included within the scope of the claims of this utility model.

Claims

1. A screw unloading and degassing device for graphitization furnace packing, characterized in that: The system includes a buffer chamber (6) for buffering materials located above the graphitization furnace (1). The buffer chamber (6) is provided with a feed pipe (7) that connects to the inner cavity of the buffer chamber (6). The discharge port at the lower end of the buffer chamber (6) is connected to a vertically downward-arranged discharge pipe (8). A discharge screw (9) that can rotate relative to the discharge pipe (8) is installed inside the discharge pipe (8). A drive device (10) for driving the discharge screw (9) to rotate is provided on the buffer chamber (6). The discharge pipe (8) includes a discharge pipe (81) and a degassing pipe (82) that are connected sequentially from top to bottom. The upper end of the discharge pipe (81) is connected to the discharge port at the lower end of the buffer chamber (6), and the lower end of the discharge pipe (81) is connected to the upper end of the degassing pipe (82). An exhaust pipe (83) that connects to the inner cavity of the degassing pipe (82) is provided on the degassing pipe (82).

2. The screw unloading and degassing device for graphitization furnace packing according to claim 1, characterized in that: Vibration components (11) are provided on the buffer chamber (6) and / or the unloading pipe (8).

3. The screw unloading and degassing device for graphitization furnace packing according to claim 1 or 2, characterized in that: The lower end of the unloading screw (9) is connected to the lower end of the unloading pipe (8), and the upper end of the unloading screw (9) passes through the buffer chamber (6) and is connected to the drive device (10) located at the upper end of the buffer chamber (6). The drive device (10) drives the unloading screw (9) to rotate.

4. The screw unloading and degassing device for graphitization furnace packing according to claim 1, characterized in that: The unloading pipe (8) includes at least one discharge pipe (81) and at least one degassing pipe (82). All discharge pipes (81) are connected in sequence and then connected in sequence to the degassing pipe (82). The lower end of the last degassing pipe (82) is provided with a support for supporting the unloading screw (9).

5. The screw unloading and degassing device for graphitization furnace packing according to claim 1, characterized in that: The degassing pipe (82) includes an inner filter pipe (821), a middle filter pipe (822), and an outer pipe (823) arranged sequentially from the inside to the outside. The filter hole diameter of the inner filter pipe (821) is larger than that of the middle filter pipe (822). There is a gap between the outer pipe (823) and the middle filter pipe (822). The exhaust pipe (83) is arranged on the outer pipe (823). The inner cavity of the exhaust pipe (83) is connected to the gap between the outer pipe (823) and the middle filter pipe (822) and the atmosphere.

6. The screw unloading and degassing device for graphitization furnace packing according to claim 5, characterized in that: One end of the exhaust pipe (83) is connected to the outer pipe (823), and the other end of the exhaust pipe (83) is bent upward to discharge air.

Images