Crystal pulling anaerobic ash conveying system

Abstract

The utility model belongs to the field of process dust removal in industrial production of monocrystalline silicon, polycrystalline silicon, heavily doped silicon single crystal and the like, and particularly relates to a crystal pulling oxygen-free ash conveying system. Aiming at the problems that the resistance of a filter bag of an existing simple harmonic dust collector is gradually increased, the quality of a crystal bar and the power consumption of rear-end equipment are seriously influenced, for example, the crystallization rate is reduced, the original crystal rate is reduced, the original crystal per unit yield is reduced and the oxygen content is increased, the following scheme is provided. The device comprises a crystal pulling furnace L located at the front end of the process, a simple harmonic dust collector A used for filtering and collecting impurities generated in the crystal pulling process, and an ash conveying pipeline B. Through automatic control, double cleaning of rapping and back flushing is carried out on a filter bag of the simple harmonic dust collector, vacuum pipeline ash discharging operation is carried out on an ash bin of the simple harmonic dust collector, and passivation treatment of dust is carried out. The safety and sustainability of production are guaranteed, the product quality is improved, the energy consumption of enterprises is reduced, the production efficiency is improved, conditions are provided for realizing continuous crystal pulling, and a step is made for the enterprises to realize intelligent factories.

Description

Technical Field

[0001] This utility model relates to the field of process dust removal technology in industrial production of monocrystalline silicon, polycrystalline silicon, and heavily doped silicon monocrystalline silicon, and in particular to an oxygen-free dust conveying system for crystal pulling. Background Technology

[0002] The crystal pulling process in single / polycrystalline furnaces generates a large amount of SiO dust that can spontaneously combust upon contact with air, and the SiO dust needs to be treated during the production process.

[0003] The existing methods for treating SiO dust have the following shortcomings:

[0004] SiO dust is treated using a harmonic dust collector. During this process, the filter bag resistance gradually increases, severely impacting crystal rod quality and downstream equipment power consumption. This results in decreased crystal formation rate, reduced primary crystal yield, lower primary crystal output, and increased oxygen content. The SiO dust in the dust collector's ash hopper requires manual cleaning using traditional methods such as shoveling, scraping, and sweeping after the machine is shut down. Given the flammable and potentially explosive nature of SiO dust upon contact with air, it must be slowly oxidized to SiO2 dust before manual cleaning. However, this process is time-consuming and prone to errors, leading to incomplete oxidation and filter bag burn-through. This compromises production safety and sustainability, severely impacting production.

[0005] To address the aforementioned problems, this utility model proposes an oxygen-free ash conveying system for crystal pulling, which solves the problems mentioned above. Summary of the Invention

[0006] This invention provides an oxygen-free ash conveying system for crystal pulling, solving the problem of existing technologies that use harmonic dust collectors to handle SiO dust. During this process, the filter bag resistance of the harmonic dust collector gradually increases, severely impacting crystal rod quality and downstream equipment power consumption. This results in decreased crystal formation rate, decreased raw crystal yield, reduced raw crystal output, and increased oxygen content. Furthermore, the SiO dust in the ash hopper of the harmonic dust collector requires manual cleaning using primitive methods such as shoveling, scraping, and sweeping after the machine is shut down. Given the flammable and potentially explosive nature of SiO dust upon contact with air, slow oxidation of the SiO dust to SiO2 dust is necessary before manual cleaning. However, this process is time-consuming and prone to errors, leading to incomplete oxidation of the dust within the harmonic dust collector and causing filter bag burn-through. This compromises production safety and sustainability, severely impacting production efficiency.

[0007] This utility model provides the following technical solution:

[0008] An oxygen-free ash conveying system for crystal pulling includes: a crystal pulling furnace L located at the front end of the process, a simple harmonic dust collector A for filtering and collecting impurities generated during crystal pulling, an ash conveying pipeline B, a centralized dust collector C, a buffer tank assembly D, an oxidation bed E, a chain conveyor, and a water tank G. A cartridge dust collector J and a second vacuum unit K2 are connected between the crystal pulling furnace L and the simple harmonic dust collector A via an emergency pipeline. The crystal pulling furnace L is connected to the simple harmonic dust collector A via an inert gas pipeline. The simple harmonic dust collector A includes an upper shell, a lower shell, a cleaning port, a first pneumatic ball valve, a first pulse valve, four blowing pipelines, a tube sheet, a support, a fixed hanger, a guide mechanism, a movable hanger, a spring, filter bags, a cylinder, and a second pneumatic ball valve. The cleaning port is located on one side of the lower shell and connected to the ash conveying pipeline B. The first pneumatic ball valve and the first pulse valve form the filter bag blowing pipeline. The upper housing is provided with a first air outlet, and the lower housing is provided with a first air inlet on the upper side. An air manifold is provided on the upper housing. The purging pipe consists of a first manual ball valve and purging nozzles. The purging nozzles are installed at an appropriate position opposite the dust removal port. There are four purging nozzles. The first air outlet is connected to a first vacuum unit K1 through a pipe. The tube sheet is welded to the lower housing. The bracket is installed on the tube sheet. The fixed hanger is installed on the bracket. The guide mechanism fixing seat is installed on the fixed hanger. The guide rod of the guide mechanism is installed on the movable hanger. The spring connects the movable hanger and the fixed hanger. The filter bag is installed between the movable hanger and the tube sheet. The cylinder is installed inside the upper housing. The second pneumatic ball valve is installed at the first air inlet and connected to the crystal pulling furnace pipe. The water tank G is installed below the chain conveyor.

[0009] In one possible design, the ash conveying pipeline B includes a second manual ball valve, a third pneumatic ball valve, and a pipeline. Both the second manual ball valve and the third pneumatic ball valve are installed at the front end of the pipeline. The front end of the ash conveying pipeline B is connected to a simple harmonic dust collector A, and the rear end is connected to a centralized dust collector C.

[0010] In one possible design, the centralized dust collector C includes support legs, a cylindrical body, a filter tube plate, filter cartridges, an air manifold support, a second air inlet, an upper end cap, a back-blowing pipe inlet, a second air outlet, a back-blowing air manifold, a second pulse valve, a conical ash hopper, a main shaft fixing plate, a main shaft fixing bracket, a motor mounting base, a first motor reducer, a main shaft, a graphite bearing, a material level sensor, a first locking nut, screws, a first key, a reducer, and a coupling. The cylindrical body is mounted on the support legs via lugs. The filter tube plate is welded into the cylindrical body, and the filter cartridges are mounted on the filter tube plate. The air manifold support is welded to the outside of the cylindrical body. The second air inlet is located on the lower side of the upper cylindrical body and connected to the ash conveying pipe B. The upper end cap is mounted on the cylindrical body. The back-blowing pipe inlet is located on the side wall of the upper end cap. The second air outlet is located on the side wall of the upper end cap. The upper end cap is connected to the third vacuum unit K3 via a pipeline. The backflush air manifold is installed on the air manifold support. The second pulse valve connects the backflush air manifold and the backflush port. The conical ash hopper is installed at the bottom of the cylinder. The main shaft fixing plate is welded to the inside of the conical ash hopper. The main shaft fixing bracket is installed between the fixing plates. The motor fixing seat is welded to the inside of the conical ash hopper. The first motor reducer is installed on the motor fixing seat. The main shaft is installed on the main shaft fixing bracket. The graphite bearing is installed between the main shaft and the main shaft fixing bracket. The reducer is connected to the main shaft via a first locking nut, screw, and first key. The coupling connects the reducer and the first motor reducer. The bottom of the conical ash hopper has a first discharge port. The material level sensor is installed at the high and low position of the conical ash hopper.

[0011] In one possible design, the buffer tank assembly D includes a fourth pneumatic ball valve, a buffer tank, a first corrugated hose, a fifth pneumatic ball valve, a sixth pneumatic ball valve, and a second corrugated hose. The fourth pneumatic ball valve is connected to a first discharge port, and the buffer tank is connected to the fourth pneumatic ball valve. The first corrugated hose is threadedly connected to the buffer tank and the cylinder. The fifth pneumatic ball valve is installed inside the first corrugated hose. The lower part of the buffer tank is provided with a buffer tank discharge port, the sixth pneumatic ball valve is installed on the buffer tank discharge port, and the second corrugated hose is installed on the sixth pneumatic ball valve.

[0012] In one possible design, the oxidation bed E includes a planetary ash discharge valve, an oxidation bed shell, and temperature sensors. The oxidation bed shell has a first feed inlet connected to a second corrugated hose of a buffer tank. The planetary ash discharge valve is connected to the first feed inlet. The oxidation bed shell is covered by a skin. The oxidation bed shell is equipped with a front door and a rear door. The front door is equipped with a valve, and the rear door is equipped with a fan. Three temperature sensors are installed on the top of the oxidation bed shell, and a water inlet is provided on the side wall of the oxidation bed shell skin.

[0013] In one possible design, the water tank G includes a water tank shell, a support beam, a water supply hose, a water supply hose, a water pump, a water level gauge, an instrument mounting plate, a water supply pipe, a third manual ball valve, a water baffle plate, and a solenoid valve. The water tank shell and the support beam are respectively installed on the front and rear sides below the water tank shell and connected to the oxidation bed shell. The water supply hose is installed at the outlet of the water pump. A water tank water supply port is provided below the water tank shell. The water supply hose connects the water tank water supply port and the water supply port for external water supply to the system. The water pump is installed at the lowest point of the water tank G. The water level gauge is fixed on the instrument mounting plate, and the instrument mounting plate is installed on the water pump side of the water tank G. The water supply pipe is connected to the water pump through the water supply hose. The third manual ball valve is installed in the water supply pipeline. The water baffle plate is welded to one side of the water supply pipe outlet. The solenoid valve is connected to the water pump and the humidifier H through the hose.

[0014] In one possible design, the humidifier H is installed inside the oxidation bed shell and faces the conveying direction of the chain conveyor. The humidifier H includes: a humidifier shell, a second inlet, a second outlet, a humidifier motor mounting base, a humidifier base, a flange, a humidifier main shaft, a second motor reducer, four nozzles, a first bearing, a second key, a bearing housing, a gasket, a second locking nut, a manifold, nozzle hoses, and a feed hopper. The second outlets are located at both ends of the humidifier shell. The humidifier motor mounting base is installed on one side of the second outlet. The humidifier base is welded to the bottom of the humidifier shell, with one on each side. The flange is welded to the humidifier shell for connecting to and sealing the oxidation bed shell. The humidifier main shaft is mounted on... Inside the humidifier housing, a stirring rod is welded to the front end of the humidifier main shaft in a spiral arrangement, and a spiral blade is welded to the rear end. The second motor reducer is mounted on the humidifier motor mounting base by screws. The humidifier housing is provided with four nozzle fixing ports, and the four nozzles are respectively installed on the nozzle fixing ports. The first bearing is installed in the humidifier motor mounting base. The second key connects the second motor reducer and the humidifier main shaft. The bearing seat is installed on one side of the second feed inlet, and the second bearing is installed inside the bearing seat. The gasket and the second locking nut are installed on the stirring rod end of the humidifier main shaft. The manifold is installed on the humidifier housing. The nozzle hose connects the nozzle and the manifold. The feed hopper is installed on the second feed inlet.

[0015] In one possible design, the chain conveyor is installed inside the oxidation bed housing and below the planetary ash discharge valve.

[0016] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0017] The beneficial effects of this utility model are as follows:

[0018] In this invention, automated dust removal reduces secondary pollution to the working environment, greatly improves the working environment, further reduces costs for enterprises, and takes another step forward in building a smart factory.

[0019] This invention improves product quality and production efficiency by shortening the downtime of the crystal pulling furnace. Attached Figure Description

[0020] Figure 1 A schematic diagram of the system structure of an oxygen-free ash conveying system for crystal pulling provided in this embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the main structure of an oxygen-free ash conveying system for crystal pulling provided in an embodiment of the present invention;

[0022] Figure 3 This is a top view of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present invention;

[0023] Figure 4 This is a cross-sectional structural schematic diagram of an oxygen-free ash conveying system for crystal pulling provided in an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the first part of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present utility model;

[0025] Figure 6 This is a top view schematic diagram of a partial structure of an oxygen-free ash conveying system for crystal pulling provided in an embodiment of the present utility model;

[0026] Figure 7 This is a partial cross-sectional view of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present utility model;

[0027] Figure 8 This is a first partial structural diagram of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present utility model;

[0028] Figure 9 This is a partial front view schematic diagram of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present utility model;

[0029] Figure 10 This is a schematic diagram of the second part of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present utility model;

[0030] Figure 11 This is a schematic diagram of the third part of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present utility model;

[0031] Figure 12This is a schematic diagram of the fourth part of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present utility model;

[0032] Figure 13 This is a schematic diagram of the fifth part of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present utility model;

[0033] Figure 14 This is a schematic diagram of the chain conveyor section of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present utility model;

[0034] Figure 15 This is a schematic diagram of a second partial structure of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present invention;

[0035] Figure 16 This is a schematic diagram of a third partial structure of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present utility model;

[0036] Figure 17 This is a schematic diagram of the sixth part of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present utility model;

[0037] Figure 18 This is a schematic diagram of the eighth part of a crystal pulling oxygen-free ash conveying system provided in an embodiment of the present utility model.

[0038] Figure label:

[0039] 1. Upper shell; 2. Lower shell; 3. Dust removal port; 4. First pneumatic ball valve; 5. First pulse valve; 6. Air tank; 7. First manual ball valve; 8. Purge nozzle; 9. First air outlet; 10. First air inlet; 11. Tube plate; 12. Support; 13. Fixed hanger; 14. Guide mechanism; 15. Movable hanger; 16. Spring; 17. Filter bag; 18. Cylinder; 19. Second pneumatic ball valve; 20. Second manual ball valve; 21. Third pneumatic ball valve; 22. Pipeline; 23. Support leg; 24. Cylinder body; 25. Support lug; 26. Tube plate of filter cartridge; 27. Filter cartridge; 28. Air manifold support; 29. ​​Second air inlet; 30. Upper end cap; 31. Backflush port; 32. Second air outlet; 33. Backflush air manifold; 34. Second pulse valve; 35. Conical ash hopper; 36. Fixing plate; 37. Main shaft fixing bracket; 38. Motor mounting base; 39. First motor reducer; 40. Main shaft; 41. Graphite bearing; 42. Material level sensor; 43. First locking nut; 44. Screw; 45. First key; 46. Reducer; 47. Coupling; 48. First discharge port; 49. Fourth pneumatic ball valve; 50. Buffer tank; 51. First corrugated hose; 52. Fifth pneumatic ball valve; 53. Buffer tank outlet; 54. Sixth pneumatic ball valve; 55. Second corrugated hose; 56. First feed inlet; 57. Planetary ash discharge valve; 58. Oxidation bed shell; 59. Front door; 60. Rear door; 61. Valve; 62. Fan; 63. Temperature sensor; 66. Water inlet; 67. Chain conveyor; 68. Water tank shell; 69. Support beam; 70. Water supply hose; 71. Water tank inlet; 72. Water supply hose; 73. Water pump; 74. Water level gauge; 75. Instrument installation. 76. Water pipe; 77. Third manual ball valve; 78. Water baffle plate; 79. Solenoid valve; 80. Humidifier housing; 81. Second feed inlet; 82. Second discharge outlet; 83. Humidifier motor mounting base; 84. Humidifier base; 85. Flange; 86. Humidifier main shaft; 87. Second motor reducer; 88. Nozzle fixing port; 89. Nozzle; 90. First bearing; 91. Second key; 92. Bearing seat; 93. Second bearing; 94. Gasket; 95. Second lock nut; 96. Manifold; 97. Nozzle hose; 98. Feed hopper. Detailed Implementation

[0040] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0041] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0042] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0043] In this embodiment of the invention, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0044] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. Example

[0045] Reference Figure 1-18An oxygen-free dust collection system for crystal pulling includes: a crystal pulling furnace L located at the front end of the process, a simple harmonic dust collector A, a dust collection pipeline B, a centralized dust collector C, a buffer tank assembly D, an oxidation bed E, a chain conveyor 67, and a water tank G. The dust-laden gas generated by the crystal pulling furnace L is first sent to the simple harmonic dust collector A through an inert gas pipeline for dust removal. The simple harmonic dust collector A consists of an upper shell 1, a lower shell 2, a dust removal port 3, a first pneumatic ball valve 4, and a first pulse valve 5. The dust removal port 3 is located on one side of the lower shell 2 and is connected to the centralized dust collector C through the dust collection pipeline B. The first pneumatic ball valve 4 and the first pulse valve 5 form a filter bag blowing pipeline for periodically cleaning the dust on the filter bags 17. The upper shell 1 has a first air outlet 9, which is connected to a first vacuum unit K1 through a pipeline to maintain a negative pressure state inside the dust collector. A blowing nozzle 8 is installed opposite the dust removal port 3 to provide additional blowing force during dust removal.

[0046] The ash conveying pipeline B includes a second manual ball valve 20, a third pneumatic ball valve 21, and a pipeline 22, which together control the conveying of dust from the simple harmonic dust collector A to the centralized dust collector C.

[0047] The centralized dust collector C includes components such as a cylinder 24, a filter cartridge 27, and a back-flushing air manifold 33. Dust-laden gas enters the cylinder 24 through the second inlet 29, is filtered by the filter cartridge 27, and then discharged clean gas from the second outlet 32, connected to the third vacuum unit K3 via pipeline. Dust is deposited in the conical dust hopper 35, and can be periodically discharged by the drive of the main shaft 40 and the reducer 46.

[0048] The buffer tank assembly D is used to temporarily store dust discharged from the centralized dust collector C. It includes components such as the fourth pneumatic ball valve 49 and the buffer tank 50. Dust enters the buffer tank 50 through the first discharge port 48 and the fourth pneumatic ball valve 49, and is then transported to the oxidation bed E through the second corrugated hose 55.

[0049] The oxidation bed E includes components such as a planetary ash discharge valve 57 and an oxidation bed shell 58. Dust enters the oxidation bed shell 58 through the first feed inlet 56 and undergoes oxidation treatment inside. A temperature sensor 63 is installed on the oxidation bed shell 58 to monitor the internal temperature. Valves 61 and fans 62 are installed on the front door 59 and rear door 60, respectively, to control the airflow.

[0050] The chain conveyor 67 is installed inside the oxidation bed housing 58 and below the planetary ash discharge valve 57 to transport the treated ash to subsequent processes.

[0051] The water tank G includes components such as a water tank housing 68 and a water pump 73. Specifically, it includes the water tank housing 68, a support beam 69, a water supply hose 70, a water supply hose 72, a water pump 73, a water level gauge 74, an instrument mounting plate 75, a water supply pipe 76, a third manual ball valve 77, a water baffle plate 78, and a solenoid valve 79. The water tank housing 68 and the support beam 69 are respectively installed on the front and rear sides below the water tank housing 68 and connected to the oxidation bed housing 58. The water supply hose 70 is installed at the outlet of the water pump 73. A [further details about the water tank housing 68 are missing from the original text.] Water tank inlet 71 and water supply hose 72 connect water tank inlet 71 and water supply outlet 66 for external water supply to the system. Water pump 73 is installed at the lowest point of water tank G. Water level gauge 74 is fixed on instrument mounting plate 75. Instrument mounting plate 75 is installed on the side of water pump 73 in water tank G. Water supply pipe 76 is connected to water pump 73 through water supply hose 70. Third manual ball valve 77 is installed in water supply pipe. Water baffle plate 78 is welded to one side of water supply pipe 76. Solenoid valve 79 is connected to water pump 73 and humidifier H through hose.

[0052] It is used to provide the system with the necessary water and to deliver water to the areas requiring humidification via water pipe 76. Water level gauge 74 is used to monitor the water level in the tank. Example

[0053] Based on Example 1, Example 2 further includes:

[0054] Reference Figure 1-18 The humidifier H is installed inside the oxidation bed housing 58 and is used to humidify the dust. It includes a humidifier housing 80, a second motor reducer 87, four nozzles 89, and other components. A stirring rod and spiral blades are welded to the humidifier main shaft 86 to agitate the dust during humidification. The second motor reducer 87 is connected to the humidifier main shaft 86 via a second key 91, providing power. The four nozzles 89 are respectively installed on the humidifier housing 80 and connected to a manifold 96 via nozzle hoses 97, used to evenly spray water mist onto the dust.

[0055] During operation, the dust-laden gas generated by the crystal pulling furnace L first enters the harmonic dust collector A for dust removal, and then is transported to the centralized dust collector C for further processing via the ash conveying pipeline B. The treated dust is temporarily stored in the buffer tank assembly D, and then undergoes oxidation treatment via the oxidation bed E. Finally, the treated dust is transported to the subsequent process via the chain conveyor 67. The water tank G provides the necessary water for the system, and the dust is humidified via the humidifier H.

[0056] However, as is well known to those skilled in the art, the working principles and wiring methods of cylinder 18, first motor reducer 39, material level sensor 42, reducer 46, temperature sensor 63, fan 62, and second motor reducer 87 are commonplace and belong to conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0057] The working principle and usage process of this technical solution are as follows: During the crystal pulling process, a clean inert gas protection is required. The negative pressure generated by the first vacuum unit K1 creates a pressure difference between the two ends of the pipeline from the first vacuum unit K1 to the crystal pulling furnace. The inert gas carries impurities and dust volatilized during the heating of the raw materials from the crystal pulling furnace L. Under the action of the pressure difference, it flows through the pipeline to the first air inlet 10 of the harmonic dust collector A. The inert gas passes through the filter bag 17, where dust and impurities are filtered out. The inert gas then flows through the harmonic dust collector A to the first air outlet 9, and through the vacuum pipeline to the first vacuum unit K1, before being discharged into the gas recovery pipeline for downstream processing. After running for a period of time, the filter bag resistance of the harmonic dust collector A will decrease. To achieve the same gas flow rate, the frequency of the first vacuum unit K1 will also increase. At this time, the filtration operation of the simple harmonic dust collector A needs to be stopped, and its filter bags and ash hopper need to be cleaned to reduce the resistance of the filter bags. First, the second pneumatic ball valve 19 installed on the first air inlet 10 is closed to prevent the back-blowing airflow from affecting the furnace pressure of the crystal pulling furnace L. At the same time, the cartridge dust collector and the second vacuum unit K2 are started to ensure the normal production of the crystal pulling furnace L. Then, the filter bag 17 is back-blown. The air tank 6 releases high-pressure, high-flow inertial airflow instantaneously and intermittently through the first pulse valve 5 and the first pneumatic ball valve 4. The outer surface of the filter bag 17 is impacted by the instantaneous high-pressure gas, removing the adhering substances on the inner surface of the filter bag 17. After the backflushing stops, cylinder 18 is activated for vibration. Cylinder 18 pushes the movable hanger 15 downwards along the guide mechanism 14, stretching spring 16 and relaxing filter bag 17. When cylinder 18 retracts, the movable hanger 15 suddenly loses its thrust and, under the action of spring 16, quickly pulls in filter bag 17. Filter bag 17 is rapidly stretched and tightened, shaking off the dust adhering to the inner surface of filter bag 17. Vibration is performed on three sets of filter bags 17 in sequence. After several rounds of vibration, ash removal begins. Ash is removed from the lower housing 2. During ash removal operations, firstly, open the second manual ball valve 20 and the third pneumatic ball valve 21 on the pipeline system B, and open the first manual ball valve 7 and the first pneumatic ball valve 4 on the pipeline connecting the air tank 6. The high-pressure inert gas in the air tank 6 passes through the pipeline and four purging nozzles 8, purging dust in different directions on the lower housing 2. The high-pressure airflow carries the dust and is discharged through the ash conveying pipeline B to the second air inlet 29 of the centralized dust collector C. After being filtered by the filter cartridge 27, the dust falls into the conical ash hopper 35. The filtered inert gas is discharged from the second air outlet 32 ​​through the first vacuum unit K1 to the gas recovery pipeline for collection and utilization. When the frequency of the third vacuum unit K3 is high, the centralized dust collector C, during the intervals between dust collection operations, performs multiple rounds of back-blowing operations on the filter cartridge 27 through the back-blowing air tank 33 and the second pulse valve 34, momentarily and intermittently, to remove the dust adhering to the outer surface of the filter cartridge, thereby reducing the resistance of the ash collection pipeline B. After collecting ash from several simple harmonic dust collectors A, the centralized dust collector C performs ash removal operations, and the ash removal operation does not affect the dust collection work of the centralized dust collector.Open the fourth pneumatic ball valve 49 and the fifth pneumatic ball valve 52 to connect the buffer tank assembly D with the centralized dust collector C. Start the first motor reducer 39, and transmit torque to the reducer 46 via the coupling 47, then to the main shaft 40. The spiral blades on the main shaft 40 push the dust into the buffer tank assembly D. When the dust in the conical ash hopper 35 reaches the low level, the level sensor 42 sends a signal, the first motor reducer 39 stops, and the fourth pneumatic ball valve 49 and the fifth pneumatic ball valve 52 close. Open the sixth pneumatic ball valve 54, and the dust in the buffer tank assembly D is discharged into the oxidation bed E. Through the first feed inlet 56 to the planetary ash discharge valve 57, the dust is evenly spread onto the steel conveyor belt of the lower chain conveyor 67. The chain conveyor 67 operates slowly at a predetermined speed, and the fan 62 of the oxidation bed E replenishes air into the oxidation bed E at a set speed, allowing the dust and air to undergo controlled oxidation. The remaining dust on the chain plate below the chain conveyor F falls into the water tank F below under the vibration and gravity of the equipment. The bottom of the water tank F is welded at a certain slope to facilitate water flow. The dust in the water tank F is transported by the water pipe 76 to the overflowing water on the side of the water baffle plate 78, washing the dust to the lowest point of the water tank. The water pump 73 pumps part of the water mixed with dust back to the side of the water baffle plate 78, and the other part to the humidifier H for dust humidification and reprocessing. The humidifier H is connected to the shell of the oxidation bed E through the flange 85 on the humidifier housing 80 to ensure the sealing of the oxidation bed shell 58. The second discharge port 82 of the humidifier H is located on the outside of the oxidation bed shell 58 for the recovery of dust after humidification and extrusion. Dust conveyed to the end by the chain conveyor F falls into the feed hopper 98 of the humidifier H. The second motor reducer 87 starts, driving the humidifier main shaft 86. The humidifier main shaft 86 has spirally arranged welded stirring rods that stir the dust, causing it to move from the second feed port 81 to the second discharge port 82. The solenoid valve 79 of the water tank G opens, and water is delivered through the water supply hose 70 to the manifold 96 of the humidifier H. The water is then distributed to four nozzles 89 to humidify the dust. The humidified dust is then gradually discharged by the humidifier main shaft 86 towards the second discharge port 82. Simultaneously, the dust undergoes humidification, stirring, and compression by the spiral humidifier H. After humidification and compression, the surface area of ​​the dust is significantly reduced, decreasing its activity. This process makes the treated dust safer, further improving product quality and production efficiency. It reduces filter bag burn-through, offers high conveying efficiency, allows for closed-loop conveying, has a high degree of automation, shortens downtime, and is safe and reliable, saving companies manpower and time costs and improving the workshop working environment. Automated dust removal reduces secondary pollution to the working environment, significantly improving the working conditions and further reducing costs for companies. This represents another step forward in building a smart factory.

[0058] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A pull-up crystal oxygen-free ash delivery system, characterized in that, include: The crystal pulling furnace (L) is located at the front end of the process, and a simple harmonic dust collector (A), ash conveying pipeline (B), centralized dust collector (C), buffer tank assembly (D), oxidation bed (E), chain conveyor (67), and water tank (G) are used to filter and collect impurities generated during the crystal pulling process. A cartridge dust collector (J) and a second vacuum unit (K2) are connected between the crystal pulling furnace (L) and the simple harmonic dust collector (A) via an emergency pipeline. The crystal pulling furnace (L) is connected to the simple harmonic dust collector (A) via an inert gas pipeline. The simple harmonic dust collector (A) includes an upper shell (1), a lower shell (2), and a lower shell (3). 2) Dust removal port (3), first pneumatic ball valve (4), first pulse valve (5), four purging pipelines, tube sheet (11), bracket (12), fixed hanger (13), guide mechanism (14), movable hanger (15), spring (16), filter bag (17), cylinder (18) and second pneumatic ball valve (19). The dust removal port (3) is located on one side of the lower shell (2) and connected to the dust conveying pipeline (B). The first pneumatic ball valve (4) and the first pulse valve (5) form the filter bag blowing pipeline. The upper shell (1) is provided with a first air outlet (9). The lower housing (2) has a first air inlet (10) on its upper side. The upper housing (1) is equipped with an air bag (6). The purging pipe consists of a first manual ball valve (7) and purging nozzles (8). The purging nozzles (8) are installed at appropriate positions opposite to the dust removal port (3). There are four purging nozzles (8). The first air outlet (9) is connected to a first vacuum unit (K1) through a pipe. The tube sheet (11) is welded to the lower housing (2). The bracket (12) is installed on the tube sheet (11). The fixed hanger (13) is installed on the bracket. (12) The guide mechanism (14) is fixed on the fixed hanger (13), the guide rod of the guide mechanism (14) is installed on the movable hanger (15), the spring (16) connects the movable hanger (15) and the fixed hanger (13), the filter bag (17) is installed between the movable hanger (15) and the flower plate (11), the cylinder (18) is installed in the upper housing (1), the second pneumatic ball valve (19) is installed in the first air inlet (10) and connected to the crystal pulling furnace pipe, and the water tank (G) is installed below the chain conveyor (67).

2. A pull-on oxygen-free ash delivery system as claimed in claim 1, characterized in that: The ash conveying pipeline (B) includes a second manual ball valve (20), a third pneumatic ball valve (21) and a pipeline (22). The second manual ball valve (20) and the third pneumatic ball valve (21) are both installed at the front end of the pipeline (22). The front end of the ash conveying pipeline (B) is connected to a simple harmonic dust collector (A) and the rear end is connected to a centralized dust collector (C).

3. A pull-on oxygen-free ash delivery system as claimed in claim 1, wherein: The centralized dust collector (C) includes support legs (23), a cylinder (24), a filter tube plate (26), a filter cartridge (27), an air manifold support (28), a second air inlet (29), an upper end cap (30), a backflush pipe (31), a second air outlet (32), a backflush air manifold (33), a second pulse valve (34), a conical dust hopper (35), a main shaft fixing plate (36), a main shaft fixing bracket (37), a motor fixing seat (38), a first motor reducer (39), a main shaft (40), a graphite bearing (41), a material level sensor (42), a first locking nut (43), and screws ( 44), first key (45), reducer (46) and coupling (47), the cylinder (24) is mounted on the support leg (23) by the lug (25), the filter tube plate (26) is welded inside the cylinder (24), the filter cartridge (27) is mounted on the filter tube plate (26), the air bag support (28) is welded to the outside of the cylinder (24), the second air inlet (29) is located on the lower side of the upper cylinder (24) and connected to the ash conveying pipeline (B), the upper end cap (30) is mounted on the cylinder (24), the backflush port (31) is located on the side wall of the upper end cap (30), the first key (45), the ...) are mounted on the cylinder (24), the first air inlet (29) is located on the lower side of the upper cylinder (24) and connected to the ash conveying pipeline (B), the second air inlet (29) is located on the lower side of the upper cylinder (24) and connected to the ash conveying pipeline (B), the second air inlet (29) is located on the lower side of the upper cylinder (24) and connected to the ash conveying pipeline (B), the second air inlet (29) is located on the lower side of the upper cylinder (2 The second air outlet (32) is located on the side wall of the upper end cap (30) and is connected to the third vacuum unit (K3) through a pipeline. The backflush air manifold (33) is installed on the air manifold bracket (28). The second pulse valve (34) connects the backflush air manifold (33) and the backflush port (31). The conical ash hopper (35) is installed at the lower part of the cylinder (24). The main shaft fixing plate (36) is welded to the inside of the conical ash hopper (35). The main shaft fixing bracket (37) is installed between the fixing plates (36). The motor fixing seat (38) is welded to the inside of the conical ash hopper (35). The first motor reducer (39) is installed on the motor mounting base (38), the main shaft (40) is installed on the main shaft mounting bracket (37), the graphite bearing (41) is installed between the main shaft (40) and the main shaft mounting bracket (37), the reducer (46) is connected to the main shaft (40) through the first locking nut (43), screw (44) and first key (45), the coupling (47) connects the reducer (46) and the first motor reducer (39), the bottom of the conical ash hopper (35) is provided with a first discharge port (48), and the material level sensor (42) is installed at the high and low position of the conical ash hopper (35).

4. A pull-on oxygen-free ash delivery system as claimed in claim 1, wherein: The buffer tank assembly (D) includes a fourth pneumatic ball valve (49), a buffer tank (50), a first corrugated hose (51), a fifth pneumatic ball valve (52), a sixth pneumatic ball valve (54), and a second corrugated hose (55). The fourth pneumatic ball valve (49) is connected to the first discharge port (48), and the buffer tank (50) is connected to the fourth pneumatic ball valve (49). The first corrugated hose (51) is threaded to connect the buffer tank (50) and the cylinder (24). The fifth pneumatic ball valve (52) is installed inside the first corrugated hose (51). The buffer tank (50) has a buffer tank discharge port (53) at its lower part. The sixth pneumatic ball valve (54) is installed on the buffer tank discharge port (53), and the second corrugated hose (55) is installed on the sixth pneumatic ball valve (54).

5. A pull-on oxygen-free ash delivery system as claimed in claim 1, wherein: The oxidation bed (E) includes a planetary ash discharge valve (57), an oxidation bed shell (58), and a temperature sensor (63). The oxidation bed shell (58) has a first feed inlet (56) and is connected to the second corrugated hose (55) of the buffer tank (50). The planetary ash discharge valve (57) is connected to the first feed inlet (56). The oxidation bed shell (58) is covered with a skin. The oxidation bed shell (58) is equipped with a front door (59) and a rear door (60). The front door (59) is equipped with a valve (61). The rear door (60) is equipped with a fan (62). Three temperature sensors (63) are installed on the top of the oxidation bed shell (58). A water inlet (66) is provided on the side wall of the skin of the oxidation bed shell (58).

6. A pull-on oxygen-free ash delivery system as claimed in claim 1, wherein: The water tank (G) includes a water tank shell (68), a support beam (69), a water supply hose (70), a water replenishment hose (72), a water pump (73), a water level gauge (74), an instrument mounting plate (75), a water supply pipe (76), a third manual ball valve (77), a water baffle plate (78), and a solenoid valve (79). The water tank shell (68) and the support beam (69) are respectively installed on the front and rear sides below the water tank shell (68) and connected to the oxidation bed shell (58). The water supply hose (70) is installed at the outlet of the water pump (73). A water tank replenishment port (71) is provided below the water tank shell (68). The hose (72) connects the water tank inlet (71) and the water inlet (66) for external water supply to the system. The water pump (73) is installed at the lowest point of the water tank (G). The water level gauge (74) is fixed on the instrument mounting plate (75). The instrument mounting plate (75) is installed on the side of the water pump (73) in the water tank (G). The water supply pipe (76) is connected to the water pump (73) through the water supply hose (70). The third manual ball valve (77) is installed in the water supply pipeline. The water baffle plate (78) is welded to the side of the water supply pipe (76). The solenoid valve (79) is connected to the water pump (73) and the humidifier (H) through the hose.

7. A pull-on oxygen-free ash delivery system as claimed in claim 6, characterized in that: The humidifier (H) is installed inside the oxidation bed shell (58) and faces the conveying direction of the chain conveyor (67). The humidifier (H) includes: a humidifier shell (80), a second inlet (81), a second outlet (82), a humidifier motor mounting base (83), a humidifier base (84), a flange (85), a humidifier main shaft (86), a second motor reducer (87), four nozzles (89), a first bearing (90), a second key (91), a bearing seat (92), a second bearing (93), and gaskets. (94), second locking nut (95), manifold (96), nozzle hose (97), and feed hopper (98), second discharge port (82) are located at both ends of the humidifier housing (80), the humidifier motor mounting base (83) is installed on one side of the second discharge port (82), the humidifier base (84) is welded to the bottom of the humidifier housing (80) and there is one on each side, the flange (85) is welded to the humidifier housing (80) for connecting and sealing the oxidation bed housing (58), and the humidifier main shaft (86). Installed inside the humidifier housing (80), the humidifier main shaft (86) has a stirring rod welded to its front end in a spiral arrangement and a spiral blade welded to its rear end. The second motor reducer (87) is mounted on the humidifier motor mounting base (83) by screws. The humidifier housing (80) is provided with four nozzle fixing ports (88), and four nozzles (89) are respectively installed on the nozzle fixing ports (88). The first bearing (90) is installed inside the humidifier motor mounting base (83), and the second key (91) connects to the second... The motor reducer (87) and the humidifier main shaft (86) are provided. The bearing housing (92) is installed on one side of the second feed port (81). The second bearing (93) is installed inside the bearing housing (92). The gasket (94) and the second locking nut (95) are installed on the stirring rod end of the humidifier main shaft (86). The manifold (96) is installed on the humidifier housing (80). The nozzle hose (97) connects the nozzle (89) and the manifold (96). The feed hopper (98) is installed on the second feed port (81).

8. A pull-on oxygen-free ash delivery system as claimed in claim 5, wherein: The chain conveyor (67) is installed inside the oxidation bed shell (58) and below the planetary ash discharge valve (57).

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