Graphite crucible production dust adsorption treatment equipment

Abstract

The present application relates to the technical field of industrial dust removal equipment, and particularly relates to a graphite crucible production dust adsorption treatment equipment, which comprises a box body, a filter assembly, an ash discharge assembly, a flow rate control assembly, a monitoring assembly and an auxiliary flow guide assembly are arranged in the box body; a feeding frame and an exhaust frame are fixedly connected to the front wall of the box body, the feeding frame is located below the exhaust frame, the feeding frame is used for feeding dust gas to be filtered into the box body, and the exhaust frame is used for guiding clean air filtered out of the box body. The filter cloth is arranged in a wave shape on the lower surface by arranging nine cloth guide rollers in four layers, the filter area of the filter cloth in the box body is effectively increased, the dust gas moves from bottom to top and fully contacts with the lower surface of the filter cloth, and the interception amount of dust per unit time is significantly improved; meanwhile, the lower surface of the filter cloth is supported by the material guide partition plate, the filter cloth is prevented from shaking under the impact of airflow, and the stability of the filtering process is ensured.

Description

Technical Field

[0001] This invention relates to the field of industrial dust removal equipment technology, and in particular to a dust adsorption and treatment device for graphite crucible production. Background Technology

[0002] The grinding, trimming, and finishing processes of graphite crucibles generate a large amount of ultrafine graphite dust. This dust has a small particle size, strong adhesion, and is conductive, making it highly susceptible to prolonged suspension and diffusion in the workshop air. If not treated promptly and effectively, it will not only severely deteriorate the production environment and endanger the occupational health of operators, but the dispersed conductive dust can also easily adhere to the surfaces of machine tool electrical components, causing short circuits. Furthermore, suspended graphite dust poses a potential flammable and explosive risk when it reaches a certain concentration. Therefore, developing efficient and stable dust adsorption and treatment equipment is of great significance for ensuring the safe production and continuous operation of graphite crucibles.

[0003] Currently, the industry commonly uses traditional fixed filter cloth dust collection structures to treat graphite dust, but this structure has many technical drawbacks. First, graphite dust particles are extremely fine and highly adhesive, easily clogging the filter cloth during operation. This leads to increased system air resistance, decreased dust collection efficiency, and frequent shutdowns for disassembly, cleaning, or replacement, severely restricting the continuous operation efficiency of the production line. Second, existing equipment mostly uses pulse jet cleaning, where high-pressure airflow generates strong turbulence within the dust collection chamber, causing the shaken-off fine dust to be re-entrained and re-adsorbed onto the filter cloth surface, resulting in poor cleaning effectiveness and reduced operational stability. More importantly, simple airflow backflushing is insufficient to effectively remove stubborn dust firmly attached to the deep layers or surface of the filter cloth fibers. As the operating cycle lengthens, the dust collection effect continuously diminishes, failing to meet the dust control requirements of continuous, high-volume production of graphite crucibles.

[0004] Therefore, there is an urgent need to design a graphite crucible production dust adsorption and treatment device that overcomes the above-mentioned defects, has efficient self-cleaning ability, and operates stably. Summary of the Invention

[0005] In order to overcome the shortcomings of existing graphite crucible dust treatment equipment, such as easy clogging of filter cloth, incomplete dust removal, serious secondary dust adhesion, and frequent maintenance, this invention provides a graphite crucible production dust adsorption and treatment equipment.

[0006] A dust adsorption and treatment device for graphite crucible production includes a housing, inside which are arranged a filter assembly, an ash removal assembly, a flow rate control assembly, a monitoring assembly, and an auxiliary flow guiding assembly. A feed frame and an exhaust frame are fixedly connected to the front wall of the housing, with the feed frame located below the exhaust frame. The feed frame is used to introduce the dust-laden gas to be filtered into the housing, and the exhaust frame is used to guide the filtered clean air out of the housing. The filter assembly filters the dust-laden gas entering the housing, the ash removal assembly discharges the dust trapped by the filter and the dust adhering to the surface of the filter assembly to the outside of the housing, the monitoring assembly monitors the inlet air velocity and concentration, the flow rate control assembly adjusts the airflow channel shape according to the detection signal from the monitoring assembly, and the auxiliary flow guiding assembly guides the airflow to the monitoring assembly to improve detection accuracy.

[0007] Optionally, the filter assembly includes nine guide rollers rotatably connected between the upper parts of the front and rear walls of the housing, filter cloth wound around the nine guide rollers, and a first motor installed on the left side of the front wall of the housing. The output shaft of the first motor is fixedly connected to the adjacent guide rollers through a coupling. The first motor is used to drive the guide rollers to rotate, thereby driving the filter cloth to circulate. The nine guide rollers are arranged in four layers according to height: the top layer has two first guide rollers symmetrically arranged on the left and right; the second layer has two second guide rollers, which are respectively located directly below the two first guide rollers; the third layer has three third guide rollers arranged inside the two second guide rollers; and the bottom layer has two fourth guide rollers symmetrically arranged relative to the third guide roller in the middle position. The lower surface of the filter cloth is the dust-receiving filter surface, which is used to trap dust, and the upper surface is the clean air surface, which is used to allow clean air to pass through.

[0008] Optionally, symmetrically arranged guide baffles are fixed between the front and rear walls of the housing. The guide baffle on the left and the inner left wall of the housing, and the guide baffle on the right and the inner right wall of the housing, form guide cavities. The guide cavities are used to guide the scraped dust to the lower part of the housing. The two guide baffles are located directly below the two second guide cloth rollers. The lower surface of the filter cloth is in contact with the top surface of each guide baffle. The guide baffles are used to support the lower surface of the filter cloth to prevent the filter cloth from shaking under the impact of airflow, and at the same time guide the scraped dust to the guide cavities on both sides.

[0009] Optionally, a dust scraper is fixed to the upper part of the left and right inner walls of the housing. The dust scraper is located on the outside of the filter cloth, and the side of the dust scraper close to the filter cloth is in contact with the outer surface of the filter cloth. The dust scraper is used to scrape off the dust adhering to the outer surface of the filter cloth when the filter cloth is circulating. The scraped dust falls directly into the material guide chambers on both sides.

[0010] Optionally, the ash discharge assembly includes ash discharge ports symmetrically arranged on the left and right sides in the lower part of the box body and a guide ramp fixed to the inner side of the bottom wall of the box body. The ash discharge ports are in communication with the interior of the adjacent guide chamber. The upper surface of the guide ramp is inclined, which is used to guide the filtered dust to the ash discharge port for discharge. The dust trapped by the filter cloth falls onto the guide ramp and slides into the ash discharge port along the inclined surface of the guide ramp. The dust scraped off by the dust scraper goes down the guide chamber to the ash discharge port for discharge.

[0011] Optionally, the flow rate control assembly includes three guide vanes rotatably connected within the feed frame in the front-to-back direction, active swing arms fixed to the left and right ends of the rotating shaft of the middle guide vane, driven swing arms fixed to the left and right ends of the rotating shafts of the front and rear guide vanes, a linkage connecting rod connecting two driven swing arms on the same side, and a transmission rod rotatably connected between the other end of each active swing arm and the adjacent linkage connecting rod. A second motor is installed on the left side of the feed frame, and the output shaft of the second motor is fixed to the active swing arm on the left side through a coupling. The second motor is used to drive the active swing arm to swing, which in turn drives each guide vane to rotate synchronously through the transmission rod and the linkage connecting rod, thereby changing the shape of the airflow channel inside the feed frame. The rotating shaft of the guide vane located in the middle position is located at its upper part, and the rotating shafts of the guide vanes located on the front and rear sides are located at their lower parts.

[0012] Optionally, the monitoring components include a flow guide plate fixed to the front inner side of the top wall of the feed frame, a pneumatic rotating plate rotatably connected within the flow guide plate, a flow velocity sensor mounted at the rear of the flow guide plate, and a concentration sensor mounted on the top wall of the feed frame and located at the rear of the flow guide plate. An air inlet is provided in the center of the flow guide plate. The pneumatic rotating plate controls the opening and closing of the air inlet on the flow guide plate. The right end of the pneumatic rotating plate is connected to the flow guide plate via a torsion spring, which is sleeved on the rotating shaft of the pneumatic rotating plate and provides a restoring force for the pneumatic rotating plate. The front sensing area of ​​the flow velocity sensor is located within the air inlet of the flow guide plate. The flow velocity sensor detects the flow velocity of the airflow entering the feed frame, and the concentration sensor detects the dust concentration in the airflow entering the feed frame. The flow velocity sensor, concentration sensor, and second motor are all electrically connected through a control module. The control module controls the operation of the second motor based on the detection signals from the flow velocity sensor and the concentration sensor.

[0013] Optionally, the auxiliary airflow guiding assembly includes a rotatable airflow guiding turntable connected to the left side of the airflow guiding mounting plate, a follower arm fixed to the left side of the airflow guiding turntable, a transmission arm fixed to the left side of the air-driven turntable, and a transmission link rotatably connected between the transmission arm and the follower arm. When the air-driven turntable rotates, it drives the airflow guiding turntable to rotate synchronously through the transmission arm, the transmission link, and the follower arm. An airflow guiding groove is provided inside the airflow guiding turntable. When the airflow guiding turntable rotates forward to a horizontal state, the rear outlet of the airflow guiding groove is aligned with the bottom detection area of ​​the concentration sensor. The airflow guiding groove is used to guide the airflow entering the feed frame to the detection area of ​​the concentration sensor.

[0014] The beneficial effects of this invention are as follows: By arranging nine guide rollers in four layers, the filter cloth is sequentially wound around the lower surface in a wavy pattern, which effectively increases the filtration area of ​​the filter cloth in the chamber. This allows the dust-laden gas to fully contact the lower surface of the filter cloth as it moves from bottom to top, significantly improving the amount of dust intercepted per unit time. At the same time, the guide baffle supports the lower surface of the filter cloth, preventing the filter cloth from shaking under the impact of airflow and ensuring the stability of the filtration process.

[0015] This invention uses a dust scraper that adheres to the outer surface of the filter cloth. During the filter cloth's circulation, the dust adhering to the outer surface is directly scraped off. The scraped-off dust flows down through the guide chamber to the ash discharge port, achieving continuous online dust removal from the filter cloth surface without the need for machine shutdown and disassembly for cleaning. The dust trapped by filtration and the scraped-off dust converge at the ash discharge port through two paths: the guide ramp and the guide chamber, respectively. This avoids the problem of dust re-entraining and re-adhesion on the filter cloth surface in traditional pulse jet cleaning methods, ensuring long-term dust removal stability.

[0016] This invention monitors airflow parameters within the feed frame in real time using flow rate and concentration sensors. When a high flow rate and low concentration are detected, the internal channels of the feed frame are divided into S-shaped channels to slow down and buffer the airflow. This effectively prevents high-speed airflow from directly impacting the filter cloth, causing deformation, shaking, and dust layer peeling. This protects the filter cloth, extends its service life, and ensures the stability of filtration efficiency. At the same time, the airflow is guided to the concentration sensor detection area by a pneumatic turntable, improving the accuracy of concentration detection and making control decisions more reliable. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural cross-sectional view of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the components of the present invention, including the feed frame, exhaust frame, and flow guide plate.

[0020] Figure 4This is a three-dimensional structural diagram of the concentration sensor, second motor, and torsion spring of the present invention.

[0021] Figure 5 This is a three-dimensional structural diagram of the components of the present invention, including the flow guide plate, the active swing arm, and the driven swing arm.

[0022] Figure 6 This is a three-dimensional structural diagram of the flow guide mounting plate and flow velocity sensor components of the present invention.

[0023] Figure 7 This is a three-dimensional structural diagram of the concentration sensor and flow guide mounting plate of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of the transmission arm, transmission connecting rod, and follower arm of the present invention.

[0025] The above-mentioned attached drawings include the following reference numerals: 1-box body, 101-material guide partition, 102-dust scraper, 2-feed frame, 3-exhaust frame, 4-ash discharge port, 501-filter cloth, 502-first motor, 503-material guide roller, 6-material guide ramp, 7-second motor, 8-concentration sensor, 901-flow guide mounting plate, 902-pneumatic rotating plate, 903-torsion spring, 1001-active swing arm, 1002-transmission rod, 1003-flow guide rotating plate, 1004-driven swing arm, 1005-linkage rod, 11-flow velocity sensor, 1201-transmission rod, 1202-follower rotating arm, 1203-air guide turntable, 1204-air guide trough, 1205-transmission rotating arm. Detailed Implementation

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1: A dust adsorption and treatment device for graphite crucible production, such as... Figures 1-3 As shown, the device includes a housing 1. A guide partition 101 is fixed between the front and rear walls of the housing 1 and is arranged symmetrically on the left and right sides. A guide cavity is formed between the guide partition 101 on the left side and the inner left wall of the housing 1, and between the guide partition 101 on the right side and the inner right wall of the housing 1. The guide cavity is used to guide the scraped dust to the lower part of the housing 1.

[0028] The front wall of the chamber 1 is fixed with an exhaust frame 3 and a feed frame 2, which are arranged at intervals. The feed frame 2 is located at the bottom and is used to pass the dust gas to be filtered into the chamber 1. The exhaust frame 3 is located at the top and is used to guide the filtered clean air out of the chamber 1.

[0029] The housing 1 is equipped with a filter assembly, which is used to filter the dust-laden gas entering the housing 1, trapping the dust on the surface of the filter cloth, and allowing clean air to pass through and be discharged.

[0030] The filter assembly includes nine guide rollers 503 rotatably connected between the upper parts of the front and rear walls of the housing 1. Filter cloth 501 is wound around the nine guide rollers 503. The guide rollers 503 are used to tension and guide the filter cloth 501 to rotate cyclically. A first motor 502 is installed on the left side of the front wall of the housing 1. The output shaft of the first motor 502 is fixedly connected to an adjacent guide roller 503 via a coupling. The first motor 502 is used to drive the guide roller 503 to rotate, thereby driving the filter cloth 501 to circulate along the guide rollers 503.

[0031] The nine guide rollers 503 are arranged in four layers according to their height: the top layer has two first guide rollers symmetrically arranged on the left and right; the second layer has two second guide rollers, which are respectively located directly below the first guide rollers; the third layer has three third guide rollers arranged inside the two second guide rollers, and the distance between the top surface of the third guide roller and the bottom surface of the second guide roller is adapted to the thickness of the filter cloth 501; the bottom layer has two fourth guide rollers, which are symmetrically arranged relative to the third guide roller in the middle position and located inside the third guide rollers on the left and right sides.

[0032] The filter cloth 501 is sequentially wound around nine guide rollers 503, such that the upper surface of the filter cloth 501 is flat between the guide rollers 503, and the lower surface is wavy between the guide rollers 503, in order to increase the effective filtration area of ​​the filter cloth 501 within the housing 1. The lower surface of the filter cloth 501 is the dust-receiving surface, used to trap dust; the upper surface is the clean air surface, through which clean air passes and is then discharged.

[0033] Two guide baffles 101 are located directly below the two second guide rollers, and the lower surface of the filter cloth 501 is in contact with the top surface of each guide baffle 101. The guide baffles 101 are used to support the lower surface of the filter cloth 501, prevent the filter cloth 501 from shaking significantly under the impact of airflow, and guide the scraped dust to the guide cavities on both sides.

[0034] The height of the feed frame 2 is lower than the two fourth guide rollers, and the exhaust frame 3 is located between the first guide roller and the second guide roller. After the dust-laden gas enters the housing 1 through the feed frame 2, it moves from bottom to top and comes into contact with the lower surface of the filter cloth 501. The dust is trapped on the lower surface of the filter cloth 501, and the clean air passes through the filter cloth 501 and is discharged through the exhaust frame 3.

[0035] The housing 1 is also equipped with a dust discharge component, which is used to collect and discharge the dust trapped by the filter component and the dust scraped off to the outside of the housing 1.

[0036] The ash discharge assembly includes ash discharge ports 4 symmetrically arranged on the left and right sides of the lower part of the box 1 and a guide ramp 6 fixed to the inner side of the bottom wall of the box 1. The ash discharge ports 4 are in communication with the adjacent guide chamber and are used to discharge the collected dust to the next process. The upper surface of the guide ramp 6 is inclined and is used to guide the filtered dust into the ash discharge port 4 for discharge.

[0037] Dust scraper plates 102 are fixedly attached to the upper part of the left and right inner walls of the housing 1. The dust scraper plates 102 are located on the outer side of the filter cloth 501, and the side of the dust scraper plate 102 closest to the filter cloth 501 is in contact with the outer surface of the filter cloth 501. When the filter cloth 501 is circulated under the drive of the first motor 502, the dust scraper plates 102 scrape off the dust adhering to the outer surface of the filter cloth 501. The scraped dust falls directly into the material guiding chambers on both sides and flows down the material guiding chambers to the ash discharge port 4 for discharge.

[0038] The feed frame 2 is equipped with a flow rate control component, which is used to adjust the airflow channel shape according to the airflow parameters in the feed frame 2 in order to control the flow rate of the airflow entering the box 1.

[0039] like Figure 4 and Figure 5 As shown, specifically, three guide plates 1003 are rotatably connected within the feed frame 2 along the front-to-back direction. The axis of rotation of the guide plate 1003 located in the middle position is located at its upper part, while the axis of rotation of the guide plates 1003 located on the front and back sides is located at its lower part. Both ends of the axis of rotation of the guide plate 1003 in the middle position are fixedly connected to an active swing arm 1001, and both ends of the axis of rotation of the guide plates 1003 on the front and back sides are fixedly connected to a driven swing arm 1004.

[0040] A linkage 1005 is rotatably connected between the two driven swing arms 1004 on the left side, and another linkage 1005 is rotatably connected between the two driven swing arms 1004 on the right side. The linkage 1005 is used to keep the two driven swing arms 1004 on the same side swinging synchronously. The other end of each driving swing arm 1001 is rotatably connected to the adjacent linkage 1005 by a transmission rod 1002. The transmission rod 1002 is used to transmit the swing motion of the driving swing arm 1001 to the linkage 1005, thereby driving the driven swing arms 1004 to swing synchronously.

[0041] A second motor 7 is installed on the left side of the feed frame 2. The output shaft of the second motor 7 is fixedly connected to the active swing arm 1001 on the left side through a coupling. The second motor 7 is used to drive the active swing arm 1001 to swing, and then drive each guide plate 1003 to rotate synchronously through the transmission rod 1002 and the linkage rod 1005, so as to change the shape of the airflow channel inside the feed frame 2.

[0042] A monitoring component is provided on the inner side of the top wall of the feed frame 2. The monitoring component is used to monitor the flow rate and concentration of the dust gas.

[0043] like Figure 4 and Figure 6 As shown, specifically, the monitoring component includes a flow guide plate 901 fixed to the front inner side of the top wall of the feed frame 2. An air inlet is provided in the center of the flow guide plate 901. A pneumatic rotating plate 902 is rotatably connected inside the flow guide plate 901, and the pneumatic rotating plate 902 is used to control the opening and closing of the air inlet on the flow guide plate 901. The right end of the pneumatic rotating plate 902 is connected to the flow guide plate 901 via a torsion spring 903. The torsion spring 903 is sleeved on the rotating shaft of the pneumatic rotating plate 902 and provides a restoring elastic force for the pneumatic rotating plate 902. A flow velocity sensor 11 is installed at the rear of the flow guide plate 901. The front sensing area of ​​the flow velocity sensor 11 is located inside the air inlet of the flow guide plate 901, and the flow velocity sensor 11 is used to detect the flow velocity of the airflow entering the feed frame 2.

[0044] A concentration sensor 8 is installed on the top wall of the feed frame 2. The concentration sensor 8 is located on the rear side of the guide plate 901. The concentration sensor 8 is used to detect the dust concentration in the airflow entering the feed frame 2.

[0045] The flow rate sensor 11, the concentration sensor 8, and the second motor 7 are all electrically connected through the control module. The control module is used to control the operation of the second motor 7 based on the detection signals from the flow rate sensor 11 and the concentration sensor 8.

[0046] The left side of the flow guide mounting plate 901 is provided with an auxiliary flow guide component, which is used to guide the airflow entering the feed frame 2 to the detection area of ​​the concentration sensor 8 to improve the accuracy of concentration detection.

[0047] like Figure 7 and Figure 8 As shown, specifically, the auxiliary airflow guiding assembly includes a guide vane 1203 rotatably connected to the left side of the airflow guiding mounting plate 901. A follower arm 1202 is fixedly connected to the left side of the guide vane 1203, and a transmission arm 1205 is fixedly connected to the left side of the wind-driven rotating plate 902. A transmission connecting rod 1201 rotatably connects the transmission arm 1205 and the follower arm 1202. When the wind-driven rotating plate 902 rotates, the wind-driven rotating plate 902 drives the guide vane 1203 to rotate synchronously through the transmission arm 1205, the transmission connecting rod 1201, and the follower arm 1202.

[0048] An air guide trough 1204 is provided inside the air guide turntable 1203. When the air guide turntable 1203 rotates forward to a horizontal state, the rear outlet of the air guide trough 1204 is aligned with the bottom detection area of ​​the concentration sensor 8. The air guide trough 1204 is used to guide the airflow entering the feed frame 2 to the detection area of ​​the concentration sensor 8.

[0049] Initially, all three guide vanes 1003 are in a flat position (the middle guide vane 1003 is flipped upwards to a horizontal position, and the front and rear guide vanes 1003 are flipped forward to a horizontal position). The internal channel of the feed frame 2 is open in the front-to-back direction, allowing airflow to pass through in a straight line. The transmission rod 1002 and the linkage rod 1005 are both in a high position. The pneumatic vane 902 is closed at the air inlet of the guide mounting plate 901 under the elastic force of the torsion spring 903. The air guide turntable 1203 is in the initial position before it flips forward, and the rear outlet of the air guide trough 1204 is offset from the detection area of ​​the concentration sensor 8.

[0050] When dust-laden gas enters through the feed frame 2, the airflow first acts on the pneumatic rotating plate 902, pushing it to flip backward and opening the air inlet on the guide plate 901. The torsion spring 903 is then twisted and stores energy. The airflow then acts on the flow rate sensor 11 through the air inlet, and the flow rate sensor 11 detects the airflow velocity in real time.

[0051] As the pneumatic rotary plate 902 flips backward, it drives the air guide turntable 1203 to flip forward to a horizontal position via the transmission arm 1205, transmission connecting rod 1201, and follower arm 1202, aligning the rear outlet of the air guide duct 1204 with the detection area of ​​the concentration sensor 8. Part of the airflow entering the feed frame 2 is guided by the air guide duct 1204 and directly acts on the detection area of ​​the concentration sensor 8, which then detects the dust concentration in the airflow in real time.

[0052] When the dust-laden gas stops flowing in or the airflow velocity decreases to an insufficient level to overcome the spring force of the torsion spring 903, the pneumatic rotary plate 902 flips forward and resets under the reset spring force of the torsion spring 903, re-closing at the air inlet of the guide plate 901. At the same time, the pneumatic rotary plate 902 drives the air guide turntable 1203 to flip backward and reset through the transmission arm 1205, the transmission connecting rod 1201 and the follower arm 1202, so that the rear outlet of the air guide duct 1204 is misaligned with the detection area of ​​the concentration sensor 8, waiting for the next airflow.

[0053] The flow rate sensor 11 and the concentration sensor 8 transmit the detection signals to the control module respectively. The control module makes a judgment based on the preset threshold and controls the action of the second motor 7.

[0054] When the flow rate is greater than or equal to the threshold and the concentration is less than the threshold (high flow rate and low concentration), the control module controls the second motor 7 to start, which drives the active swing arm 1001 to deflect downward. Through the transmission rod 1002 and the linkage rod 1005, the driven swing arm 1004 is driven to flip downward synchronously, so that the three guide plates 1003 are flipped from the horizontal state to the vertical state, dividing the internal channel of the feed frame 2 into an S-shaped channel. After the airflow flows along the S-shaped channel, it enters the box 1, and the flow rate is reduced, achieving deceleration and buffering.

[0055] In other operating conditions (high flow rate and high concentration, low flow rate and high concentration, low flow rate and low concentration), the control module does not control the second motor 7 to operate, the three guide plates 1003 remain flat, the internal channel of the feed frame 2 remains open, and the airflow passes through in its original state.

[0056] The above control logic is based on the following: When the airflow velocity is high and the dust concentration is low, the high-speed airflow directly impacts the lower surface of the filter cloth 501, easily causing the filter cloth 501 to deform and shake, resulting in the already attached dust layer being blown away and peeled off, reducing filtration accuracy, and long-term operation will accelerate the fatigue and aging of the filter cloth 501. Therefore, under this operating condition, the airflow is slowed down and buffered to protect the filter cloth 501 and ensure the stability of filtration efficiency. Under other operating conditions, adding extra airflow resistance would easily cause dust to settle and clog inside the feed frame 2, so keeping the channel unobstructed is more reasonable.

[0057] Dust-laden gas enters the housing 1 through the feed frame 2 and moves upward, contacting the lower surface of the filter cloth 501. The dust is trapped on the lower surface of the filter cloth 501, while clean air passes through the filter cloth 501 and is discharged through the exhaust frame 3. Under the action of gravity, the trapped dust falls to the guide ramp 6 and slides along the ramp into the ash discharge port 4 for discharge.

[0058] During equipment operation, the first motor 502 continuously drives the guide roller 503 to rotate, driving the filter cloth 501 to circulate. When the filter cloth 501 with dust adhering to it rotates to the position of the dust scraper 102, the dust scraper 102 scrapes off the dust adhering to the outer surface of the filter cloth 501. The scraped-off dust falls directly into the material guiding chambers on both sides and flows down the material guiding chambers to the ash discharge port 4 for discharge.

[0059] In summary, the dust filtered and trapped by the filter cloth 501 and the dust scraped off by the dust scraper 102 converge at the ash discharge port 4 through two paths, the guide ramp 6 and the guide chamber, respectively, and are discharged and recycled in a unified manner, realizing efficient collection and continuous treatment of dust.

[0060] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A dust adsorption and treatment device for graphite crucible production, comprising a housing (1), characterized in that, The housing (1) is equipped with a filter assembly, a dust removal assembly, a flow rate control assembly, a monitoring assembly, and an auxiliary flow guide assembly. The front wall of the housing (1) is fixed with a feed frame (2) and an exhaust frame (3). The feed frame (2) is located below the exhaust frame (3). The feed frame (2) is used to pass the dust gas to be filtered into the housing (1). The exhaust frame (3) is used to guide the filtered clean air out of the housing (1). The filter assembly is used to filter the dust-laden gas entering the housing (1). The dust removal assembly is used to discharge the dust trapped by the filter and the dust attached to the surface of the filter assembly to the outside of the housing (1). The dust removal assembly is used to discharge the dust trapped by the filter and the dust attached to the surface of the filter cloth (501) to the outside of the housing (1). The monitoring assembly is used to monitor the inlet air velocity and concentration. The flow rate control assembly is used to adjust the airflow channel shape according to the detection signal of the monitoring assembly. The auxiliary flow guide assembly is used to guide the airflow to the monitoring assembly to improve the detection accuracy. The monitoring components include a flow guide plate (901) fixed to the front inner side of the top wall of the feed frame (2), a pneumatic rotating plate (902) rotatably connected to the flow guide plate (901), a flow rate sensor (11) installed at the rear of the flow guide plate (901), and a concentration sensor (8) installed on the top wall of the feed frame (2) and located at the rear of the flow guide plate (901); an air inlet is provided in the middle of the flow guide plate (901), and the pneumatic rotating plate (902) is used to control the opening and closing of the air inlet on the flow guide plate (901). The right end of the pneumatic rotating plate (902) is connected to the flow guide plate (901) by a torsion spring (903). 3) The torsion spring (903) is fitted on the rotating shaft of the pneumatic rotating plate (902) to provide the restoring elastic force for the pneumatic rotating plate (902); the front sensing area of ​​the flow rate sensor (11) is located in the air inlet of the guide plate (901). The flow rate sensor (11) is used to detect the flow rate of the airflow entering the feed frame (2), and the concentration sensor (8) is used to detect the dust concentration in the airflow entering the feed frame (2); the flow rate sensor (11), the concentration sensor (8) and the second motor (7) are all electrically connected through the control module. The control module is used to control the action of the second motor (7) according to the detection signals of the flow rate sensor (11) and the concentration sensor (8).

2. The graphite crucible production dust adsorption and treatment equipment according to claim 1, characterized in that, The filter assembly includes nine guide rollers (503) rotatably connected between the upper parts of the front and rear walls of the housing (1), filter cloth (501) wound around the nine guide rollers (503), and a first motor (502) installed on the left side of the front wall of the housing (1). The output shaft of the first motor (502) is fixedly connected to the adjacent guide rollers (503) through a coupling. The first motor (502) is used to drive the guide rollers (503) to rotate, thereby driving the filter cloth (501) to circulate. (503) The filter cloth is arranged in four layers according to height: the top layer is equipped with two first guide rollers symmetrically arranged on the left and right; the second layer is equipped with two second guide rollers and respectively located directly below the two first guide rollers; the third layer is equipped with three third guide rollers and arranged inside the two second guide rollers; the bottom layer is equipped with two fourth guide rollers and arranged symmetrically with respect to the third guide roller in the middle position; the lower surface of the filter cloth (501) is the dust-receiving filter surface, which is used to intercept dust, and the upper surface is the clean air surface, which is used to allow clean air to pass through.

3. The graphite crucible production dust adsorption and treatment equipment according to claim 2, characterized in that, A guide partition (101) is fixedly connected between the front and rear walls of the box (1). A guide cavity is formed between the guide partition (101) on the left and the inner wall of the box (1) on the left, and between the guide partition (101) on the right and the inner wall of the box (1) on the right. The guide cavity is used to guide the scraped dust to the lower part of the box (1). The two guide partitions (101) are located directly below the two second guide cloth rollers. The lower surface of the filter cloth (501) is in contact with the top surface of each guide partition (101). The guide partition (101) is used to support the lower surface of the filter cloth (501) to prevent the filter cloth (501) from shaking under the impact of airflow, and at the same time guides the scraped dust to the guide cavities on both sides.

4. The graphite crucible production dust adsorption and treatment equipment according to claim 3, characterized in that, Dust scraper (102) is fixed to the upper part of the left and right inner walls of the box (1). The dust scraper (102) is located on the outside of the filter cloth (501), and the side of the dust scraper (102) close to the filter cloth (501) is in contact with the outer surface of the filter cloth (501). The dust scraper (102) is used to scrape off the dust adhering to the outer surface of the filter cloth (501) when the filter cloth (501) is circulating. The scraped dust falls directly into the material guide chambers on both sides.

5. The graphite crucible production dust adsorption and treatment equipment according to claim 4, characterized in that, The dust discharge assembly includes a dust discharge port (4) symmetrically arranged on the left and right sides in the lower part of the box (1) and a guide ramp (6) fixed to the inner side of the bottom wall of the box (1). The dust discharge port (4) is in communication with the adjacent guide chamber. The upper surface of the guide ramp (6) is an inclined surface, which is used to guide the dust that falls after filtration into the dust discharge port (4) for discharge. The dust filtered and intercepted by the filter cloth (501) falls onto the guide ramp (6) and slides into the dust discharge port (4) along the inclined surface of the guide ramp (6) for discharge. The dust scraped off by the dust scraper (102) goes down along the guide chamber to the dust discharge port (4) for discharge.

6. The graphite crucible production dust adsorption and treatment equipment according to claim 5, characterized in that, The flow rate control assembly includes three guide vanes (1003) rotatably connected to the feed frame (2) in the front-to-back direction, active swing arms (1001) fixed to the left and right ends of the rotating shaft of the guide vane (1003) in the middle position, driven swing arms (1004) fixed to the left and right ends of the rotating shaft of the guide vanes (1003) on the front and back sides, a linkage rod (1005) connecting the two driven swing arms (1004) on the same side, and a transmission rod (1002) rotatably connected between the other end of each active swing arm (1001) and the adjacent linkage rod (1005). A second motor (7) is installed on the left side of the feed frame (2). The output shaft of the second motor (7) is fixed to the active swing arm (1001) on the left side through a coupling. The second motor (7) is used to drive the active swing arm (1001) to swing, and then drive each guide plate (1003) to rotate synchronously through the transmission rod (1002) and the linkage rod (1005) to change the shape of the airflow channel inside the feed frame (2). The rotating shaft of the guide plate (1003) located in the middle position is located at its upper part, and the rotating shaft of the guide plates (1003) located on the front and rear sides is located at its lower part.

7. The graphite crucible production dust adsorption and treatment equipment according to claim 6, characterized in that, The auxiliary airflow guiding assembly includes a guide vane (1203) rotatably connected to the left side of the airflow mounting plate (901), a follower arm (1202) fixed to the left side of the guide vane (1203), a transmission arm (1205) fixed to the left side of the wind-driven rotating plate (902), and a transmission link (1201) rotatably connected between the transmission arm (1205) and the follower arm (1202); when the wind-driven rotating plate (902) rotates, the wind-driven rotating plate (902) is guided by the transmission arm. (1205), the transmission link (1201) and the follower arm (1202) drive the air guide turntable (1203) to rotate synchronously; the air guide turntable (1203) is provided with an air guide groove (1204). When the air guide turntable (1203) rotates forward to a horizontal state, the rear outlet of the air guide groove (1204) is aligned with the bottom detection area of ​​the concentration sensor (8). The air guide groove (1204) is used to guide the airflow entering the feed frame (2) to the detection area of ​​the concentration sensor (8).

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