A protective gas recovery and circulation device for graphitization furnace

Abstract

This utility model discloses a protective gas recovery and circulation device for a graphitization furnace, relating to the field of chemical equipment technology. It includes a graphitization furnace body, within which a protective gas body is disposed. A Venturi tube is connected to the graphitization furnace body to accelerate the flow rate of the protective gas body. A dust filter is connected to the Venturi tube, and a dust removal assembly is disposed within the dust filter. The dust removal assembly includes a rotating shaft rotatably connected to the inner wall of the dust filter. Several fan blades are fixedly installed on the circumferential side of the rotating shaft, and striking wheels are fixedly installed on the circumferential side of the rotating shaft. The striking wheels are eccentrically connected to the rotating shaft. In this utility model, the flowing protective gas body contacts and drives the fan blades to rotate. The rotating fan blades drive the striking wheels to rotate via the rotating shaft. During rotation, the striking wheels collide with the filter bag, causing the filter bag to vibrate and dislodge carbon powder.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a protective gas recovery and circulation device for a graphitization furnace. Background Technology

[0002] A graphitization furnace is an industrial kiln used for high-temperature heat treatment. Its core purpose is to transform the amorphous carbon structure in carbon-containing materials into a highly ordered graphite crystal structure. During the graphitization process, protective gases such as nitrogen and argon are introduced into the graphitization furnace to displace and replace the internal air, creating an oxygen-free or low-oxygen environment. This ensures that the graphite will not be oxidized at high temperatures, thereby guaranteeing product quality and yield.

[0003] Chinese patent CN208786378U discloses a protective gas recovery and recycling device for a graphitization furnace. The device includes a graphitization furnace, a dust filter, an oil-free compressor, a deoxidizer, a cooler, an adsorption tower assembly, and a gas storage tank. An argon gas pipeline is connected to the top of the graphitization furnace, and the dust filter is connected to the bottom. The dust filter is sequentially connected to the oil-free compressor, deoxidizer, cooler, adsorption tower assembly, and gas storage tank via pipelines. A make-up gas pipeline connects the top of the gas storage tank to the top of the graphitization furnace. This invention recovers, purifies, and recycles the protective gas, argon, reducing production costs and bringing certain economic benefits. Furthermore, the argon gas recovery and recycling eliminates the environmental pollution caused by existing waste gas emissions.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: As time goes by, the micropores of the bag filters or ceramic filters commonly used in dust collectors are easily clogged by carbon powder, resulting in limited filtration effect and requiring periodic replacement by stopping the machine, which increases maintenance costs. Utility Model Content

[0005] Given that the micropores of the bag filters or ceramic filters commonly used in the above dust removal filters are easily clogged by carbon powder over time, resulting in limited filtration effect and the need for periodic replacement due to downtime, which increases maintenance costs, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a protective gas recovery and circulation device for graphitization furnaces. The flowing protective gas body contacts the fan blades and drives the fan blades to rotate. The rotating fan blades drive the striking wheel to rotate through the rotating shaft. During the rotation, the striking wheel collides with the filter bag of the dust collector, causing the filter bag to vibrate and shake off the carbon powder, thereby extending the service life of the filter bag, extending the downtime replacement cycle, and reducing maintenance costs.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a protective gas recovery and circulation device for a graphitization furnace, comprising a graphitization furnace body, a protective gas body disposed within the graphitization furnace body, a venturi tube connected to the graphitization furnace body, the venturi tube being used to accelerate the flow rate of the protective gas body, and a dust removal filter connected to the venturi tube, wherein a dust removal component is disposed within the dust removal filter. The dust removal assembly includes a rotating shaft, which is rotatably connected to the inner wall of the dust filter. Several fan blades are fixedly installed on the circumferential side of the rotating shaft, and knocking wheels are fixedly installed on the circumferential side of the rotating shaft. The knocking wheels are eccentrically connected to the rotating shaft.

[0008] As a preferred embodiment of the graphitization furnace protective gas recovery and circulation device of this utility model, the dust removal filter is connected to a dust discharge component; The dust removal assembly includes an installation chamber, which is fixedly connected to a dust filter. A long shaft is rotatably connected to the inner wall of the installation chamber, and a baffle is fixedly connected to the circumferential side of the long shaft. A blocking frame is fixedly installed on the inner wall of the dust discharge section of the dust filter. One end of the long shaft extends out of the installation chamber and is fixedly connected to a rotating arm, and a counterweight is fixedly connected to the rotating arm.

[0009] As a preferred embodiment of the graphitization furnace protective gas recovery and circulation device of this utility model, the installation chamber and the dust filter are provided with through slots, the baffle extends through the through slots into the ash discharge section of the dust filter, the baffle initially abuts against the lower surface of the blocking frame, the blocking frame is provided with an inclined surface, and the two sets of dust discharge components are arranged vertically.

[0010] As a preferred embodiment of the graphitization furnace protective gas recovery and circulation device of this utility model, the graphitization furnace body is connected to an air inlet pipe, and valves are fixedly installed on the air inlet pipe and the venturi tube respectively, and a spiral guide groove is provided on the inner wall of the diffusion section of the venturi tube.

[0011] As a preferred embodiment of the graphitization furnace protective gas recovery and circulation device of this utility model, the dust filter is connected to an oil-free compressor via a pipeline, the oil-free compressor is connected to a deoxygenation tower via a pipeline, the deoxygenation tower is connected to a cooler via a pipeline, the cooler is connected to an adsorption tower group via a pipeline, and the adsorption tower group is connected to a gas storage tank via a pipeline.

[0012] As a preferred embodiment of the graphitization furnace protective gas recovery and circulation device of this utility model, the gas storage tank is connected to a gas replenishment pipe, the end of the gas replenishment pipe away from the gas storage tank is connected to the graphitization furnace body, and a precision filter is provided on the gas replenishment pipe.

[0013] The beneficial effects of this utility model are: 1. This utility model is based on the Venturi effect. The Venturi tube uses the high-temperature protective gas in the graphitization furnace as a power source to drive the protective gas to flow into the dust collector filter. The flowing protective gas comes into contact with the fan blades and drives the fan blades to rotate. The rotating fan blades drive the striking wheel to rotate through the rotating shaft. During the rotation, the striking wheel collides with the filter bag of the dust collector filter, causing the filter bag to vibrate and shake off the carbon powder, thereby extending the service life of the filter bag, extending the downtime replacement cycle, and reducing maintenance costs.

[0014] 2. This utility model uses a lever structure composed of a baffle, a long shaft, and a rotating arm. A counterweight provides clockwise rotation power to the baffle, causing it to fit tightly against the blocking frame and block the dust filter. The baffle catches the dislodged carbon powder. As time goes on, the amount of carbon powder gradually increases, overcoming the torque of the counterweight, causing the baffle to rotate counterclockwise. A gap is created between the baffle and the blocking frame, allowing the carbon powder to fall. The two sets of dust removal components work together. When the upper baffle rotates open, the lower baffle abuts against the blocking frame, and the upper baffle automatically resets after emptying the carbon powder. Thus, the collected carbon powder is automatically and periodically discharged without compromising the seal.

[0015] 3. This utility model creates a spiral guide groove on the inner wall of the diffuser section of the venturi tube, causing the protective gas body to swirl, and then performs preliminary separation of the carbon powder in the protective gas body by centrifugation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of the protective gas recovery and circulation device for the graphitization furnace of this utility model.

[0017] Figure 2 This is a schematic diagram of the dust removal filter and dust discharge components of the protective gas recovery and circulation device for graphitization furnace of this utility model.

[0018] Figure 3 This is a cross-sectional schematic diagram of the dust removal filter in the protective gas recovery and circulation device for graphitization furnace of this utility model.

[0019] Figure 4 This is a schematic diagram of the dust removal component of the protective gas recovery and circulation device for graphitization furnace of this utility model.

[0020] Figure 5This is a partial structural schematic diagram of the dust removal component of the protective gas recovery and circulation device for graphitization furnace of this utility model.

[0021] Figure 6 This is a cross-sectional schematic diagram of the Venturi tube of the graphitization furnace protective gas recovery and circulation device of this utility model.

[0022] Explanation of reference numerals in the attached figures: 1. Graphitization furnace body; 2. Venturi tube; 3. Dust filter; 4. Dust removal assembly; 401. Rotating shaft; 402. Fan blade; 403. Impact wheel; 5. Dust removal assembly; 501. Installation chamber; 502. Long shaft; 503. Baffle; 504. Blocking frame; 505. Rotating arm; 506. Counterweight; 507. Through groove; 508. Inclined surface; 6. Air inlet pipe; 7. Valve; 8. Spiral guide groove; 9. Oil-free compressor; 10. Deoxygenation tower; 11. Cooler; 12. Adsorption tower group; 13. Gas storage tank; 14. Gas replenishment pipeline; 15. Precision filter. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example 1

[0024] Reference Figures 1-6 The first embodiment of this utility model provides a protective gas recovery and circulation device for a graphitization furnace, including a graphitization furnace body 1, a protective gas body disposed inside the graphitization furnace body 1, a venturi tube 2 connected to the graphitization furnace body 1, the venturi tube 2 being used to accelerate the flow rate of the protective gas body, a dust removal filter 3 connected to the venturi tube 2, and a dust removal component 4 disposed inside the dust removal filter 3. The dust removal assembly 4 includes a rotating shaft 401, which is rotatably connected to the inner wall of the dust filter 3. Several fan blades 402 are fixedly installed on the circumferential side of the rotating shaft 401, and a striking wheel 403 is fixedly installed on the circumferential side of the rotating shaft 401. The several striking wheels 403 are eccentrically connected to the rotating shaft 401. The graphitization furnace body 1 is connected to an air inlet pipe 6. Valves 7 are fixedly installed on the air inlet pipe 6 and the venturi tube 2 respectively. The inner wall of the diffuser section of the venturi tube 2 is provided with a spiral guide groove 8. Example 2

[0025] Reference Figure 3 and Figure 5 This is the second embodiment of the present invention, which differs from the first embodiment in that: the dust filter 3 is connected to the dust removal component 5; The dust removal assembly 5 includes an installation chamber 501, which is fixedly connected to the dust filter 3. A long shaft 502 is rotatably connected to the inner wall of the installation chamber 501. A baffle 503 is fixedly connected to the circumferential side of the long shaft 502. A blocking frame 504 is fixedly installed on the inner wall of the dust discharge section of the dust filter 3. One end of the long shaft 502 extends out of the installation chamber 501 and is fixedly connected to a rotating arm 505. A counterweight 506 is fixedly connected to the rotating arm 505.

[0026] The installation chamber 501 and the dust filter 3 are provided with a through groove 507. The baffle 503 extends through the through groove 507 into the dust discharge section of the dust filter 3. In the initial state, the baffle 503 abuts against the lower surface of the blocking frame 504. The blocking frame 504 is provided with an inclined surface 508. Two sets of dust discharge components 5 are arranged vertically. Example 3

[0027] Reference Figure 1 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that: the dust filter 3 is connected to the oil-free compressor 9 through a pipe, the oil-free compressor 9 is connected to the deoxygenation tower 10 through a pipe, the deoxygenation tower 10 is connected to the cooler 11 through a pipe, the cooler 11 is connected to the adsorption tower group 12 through a pipe, and the adsorption tower group 12 is connected to the gas storage tank 13 through a pipe.

[0028] The gas storage tank 13 is connected to a gas supply pipe 14. The end of the gas supply pipe 14 away from the gas storage tank 13 is connected to the graphitization furnace body 1. A precision filter 15 is installed on the gas supply pipe 14.

[0029] During use, the graphitization furnace body 1 heats the graphite, and the protective gas body is introduced into the graphitization furnace body 1 through the air inlet pipe 6. Since the graphitization furnace body 1 is a sealed environment, the gas pressure inside the graphitization furnace body 1 also increases as the temperature rises. After processing is completed, the valve 7 on the venturi tube 2 is opened, and the protective gas body flows from the graphitization furnace body 1 into the dust removal filter 3.

[0030] The cross-sectional area of ​​the contraction section of the Venturi tube 2 gradually decreases, converting pressure energy into kinetic energy and increasing the flow velocity of the protective gas. The flow velocity of the protective gas reaches its maximum at the throat of the Venturi tube 2, and according to the Venturi effect, the hydrostatic pressure of the fluid at this point also drops to its lowest point, forming a strong negative pressure zone. The cross-sectional area of ​​the diffusion section of the Venturi tube 2 gradually increases, and the kinetic energy is converted back into pressure energy, gradually reducing the flow velocity of the protective gas. This allows the extraction of the protective gas without the need for an electric fan. At the same time, the spiral guide groove 8 causes the protective gas to swirl, and the carbon powder in the protective gas is initially separated by centrifugation.

[0031] The flowing protective gas body contacts the fan blade 402 and drives the fan blade 402 to rotate. The rotating fan blade 402 drives the striking wheel 403 to rotate through the rotating shaft 401. During rotation, the striking wheel 403 collides with the filter bag of the dust collector filter 3, causing the filter bag to vibrate and shake off the carbon powder, thereby extending the service life of the filter bag, extending the downtime replacement cycle, and reducing maintenance costs. If the dust collector filter 3 is a bag filter, the striking wheel 403 is made of a hard material to ensure the collision effect. If the dust collector filter 3 is a ceramic filter, the striking wheel 403 is made of an elastic material to avoid damaging the ceramic filter element. In order to improve the effect of the striking wheel 403, the filter bag or ceramic filter element is connected into a whole by a plate so that all the filter bags or ceramic filter elements vibrate synchronously.

[0032] The shaken-off toner falls onto baffle 503. As time goes on, the toner gradually increases, overcoming the torque of the counterweight 506. Baffle 503 rotates counterclockwise, creating a gap between baffle 503 and blocking frame 504, allowing the toner to fall. The inclined surface 508 of the blocking frame 504 prevents toner from adhering and remaining. The two sets of dust removal components 5 work together. When the upper baffle 503 rotates open, the lower baffle 503 abuts against the blocking frame 504. The upper baffle 503 automatically resets after emptying the toner, thus automatically and periodically discharging the collected toner without compromising the seal. The discharged toner can be collected and processed centrally.

[0033] The protective gas, after passing through the dust filter 3 to filter carbon powder, is compressed and heated by the oil-free compressor 9 before entering the deoxidation tower 10. Oxygen and other substances in the protective gas react with the high-efficiency catalyst in the deoxidation tower 10 to generate substances that can be adsorbed by the subsequent adsorbent. The deoxidized protective gas then enters the cooler 11 for heat exchange and cooling. The cooled protective gas then enters the adsorption tower group 12. The adsorbents in the adsorption tower group 12 mainly include molecular sieves and alumina, primarily adsorbing water and other impurities in the protective gas. The adsorption tower group 12 consists of two towers, A and B. When tower A is performing adsorption, tower B is regenerated or ready for use; when tower B is performing adsorption, tower A is regenerated or ready for use. During the regeneration process, the protective gas is electrically heated, and the adsorbent is purged to remove impurities. The protective gas after adsorption enters the storage tank 13 for storage. When the pressure in the storage tank 13 reaches a certain level, the gas is discharged, filtered by the precision filter 15, and then replenished to the graphitization furnace body 1 for recycling.

[0034] The remaining structure is the same as that in Example 1.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A protective gas recovery and circulation device for a graphitization furnace, characterized in that: The system includes a graphitization furnace body (1), a protective gas body is provided inside the graphitization furnace body (1), a venturi tube (2) is connected to the graphitization furnace body (1), the venturi tube (2) is used to accelerate the flow rate of the protective gas body, the venturi tube (2) is connected to a dust removal filter (3), and a dust removal component (4) is provided inside the dust removal filter (3). The dust removal assembly (4) includes a rotating shaft (401), which is rotatably connected to the inner wall of the dust filter (3). Several fan blades (402) are fixedly installed on the circumferential side of the rotating shaft (401), and knocking wheels (403) are fixedly installed on the circumferential side of the rotating shaft (401). Several knocking wheels (403) are eccentrically connected to the rotating shaft (401).

2. The graphitization furnace protective gas recovery and circulation device according to claim 1, characterized in that: The dust filter (3) is connected to a dust discharge assembly (5); The dust removal assembly (5) includes an installation chamber (501), which is fixedly connected to the dust filter (3). A long shaft (502) is rotatably connected to the inner wall of the installation chamber (501). A baffle (503) is fixedly connected to the circumferential side of the long shaft (502). A blocking frame (504) is fixedly installed on the inner wall of the dust discharge section of the dust filter (3). One end of the long shaft (502) extends out of the installation chamber (501) and is fixedly connected to a rotating arm (505). A counterweight (506) is fixedly connected to the rotating arm (505).

3. The graphitization furnace protective gas recovery and circulation device according to claim 2, characterized in that: The installation chamber (501) and the dust filter (3) are provided with a through groove (507). The baffle (503) extends through the through groove (507) into the dust discharge section of the dust filter (3). In the initial state, the baffle (503) abuts against the lower surface of the blocking frame (504). The blocking frame (504) is provided with an inclined surface (508). The two sets of dust discharge components (5) are arranged vertically.

4. The graphitization furnace protective gas recovery and circulation device according to claim 1, characterized in that: The graphitization furnace body (1) is connected to an air inlet pipe (6), and valves (7) are fixedly installed on the air inlet pipe (6) and the venturi tube (2). The inner wall of the diffusion section of the venturi tube (2) is provided with a spiral guide groove (8).

5. The protective gas recovery and circulation device for graphitization furnace according to claim 1, characterized in that: The dust filter (3) is connected to an oil-free compressor (9) via a pipe. The oil-free compressor (9) is connected to a deoxygenation tower (10) via a pipe. The deoxygenation tower (10) is connected to a cooler (11) via a pipe. The cooler (11) is connected to an adsorption tower group (12) via a pipe. The adsorption tower group (12) is connected to a gas storage tank (13) via a pipe.

6. The graphitization furnace protective gas recovery and circulation device according to claim 5, characterized in that: The gas storage tank (13) is connected to a gas supply pipe (14). The end of the gas supply pipe (14) away from the gas storage tank (13) is connected to the graphitization furnace body (1). A precision filter (15) is provided on the gas supply pipe (14).

Images