An ash collection system

Abstract

This invention discloses a dust collection system, relating to the field of semiconductor fabrication technology, comprising a dust collector, a dust conveying pipeline, and a dust collection hopper. The dust collector has a first air outlet, a first air inlet, and a cleaning port. The casing contains a first clean air chamber and a first turbid air chamber. The first clean air chamber contains several first filter structures and a rapping structure. The rapping structure is used to vibrate the first filter structures. The first turbid air chamber has a blowing structure for blowing the dust filtered by the first filter structures to the cleaning port. The dust collection hopper includes a cylindrical body and a dust bin. The cylindrical body has a second air inlet and a second air outlet. The cleaning port is connected to the second air inlet via the dust conveying pipeline. The cylindrical body contains a second clean air chamber and a second turbid air chamber. The second turbid air chamber contains a second filter structure. The dust bin is connected to the second turbid air chamber and contains a dust collection structure for collecting dust. This invention solves the problems of low efficiency and potential secondary pollution associated with manual dust bin cleaning.

Description

Technical Field

[0001] This invention relates to the field of semiconductor manufacturing technology, and in particular to a dust collection system. This invention relates to a dust removal system for process dust handling in industrial production of monocrystalline silicon, polycrystalline silicon, and heavily doped silicon monocrystalline silicon. 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. A simple harmonic vacuum dust collector filters this SiO dust and stores it in an ash hopper. Once the dust in the ash hopper reaches a certain level, ash removal is required. Currently, ash removal from dust collectors generally uses ash hopper vibration and a rotary valve at the cleaning port. For small dust collectors, due to their smaller size, manual scooping, shoveling, and sweeping are typically used to remove ash.

[0003] Given that SiO dust can spontaneously combust or even explode when exposed to air, it must be slowly oxidized into SiO2 dust before manual cleaning. However, this process takes a lot of time, and the significant time loss has severely restricted production capacity growth.

[0004] After one working cycle, the dust collector begins the ash hopper cleaning process. Before cleaning, a slow oxidation process of 90-120 minutes is required. When manually cleaning, protective clothing, goggles, and masks must be worn. Scrapers and brooms are used to collect the dust into bags. This process generates dust, causing secondary pollution to the workshop environment. It also increases the burden on subsequent workshop cleaning and equipment maintenance. Each harmonic vacuum dust collector requires 90-120 minutes of slow oxidation; the process is cumbersome, and improper operation can cause deflagration or equipment burnout, posing a significant safety hazard and hindering production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide an ash collection system that enables closed-loop conveying of dust and centralized processing through connection with other equipment, thereby solving the problems of low efficiency and easy secondary pollution caused by manual cleaning of ash silos.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides an ash collection system, including an ash discharge dust collector, an ash conveying pipeline, and an ash collection tank. The ash discharge dust collector includes a shell with a first air outlet, a first air inlet, and a cleaning port. The shell contains a first clean air chamber and a first turbid air chamber. The first clean air chamber contains a plurality of first filter structures and a rapping structure, the rapping structure being used to rappel the first filter structures. The first turbid air chamber contains a purging structure, the purging structure being used to blow the dust filtered by the first filter structures to the cleaning port. The ash collection tank includes a cylindrical body and an ash bin. The cylindrical body has a second air inlet and a second air outlet. The cleaning port and the second air inlet are connected through the ash conveying pipeline. The cylindrical body contains a second clean air chamber and a second turbid air chamber. The second turbid air chamber contains a second filter structure. The ash bin is connected to the second turbid air chamber. The ash bin contains an ash collection structure, the ash collection structure being used to collect dust.

[0008] Preferably, the dust collector further includes a first air chamber located outside the housing. The first air chamber is equipped with a safety valve, a first solenoid valve, and a first manual ball valve. The first air chamber is connected to the first clean air chamber via a first jet pipe. The air outlet of the first jet pipe is located above the first filter structure. The first jet pipe is equipped with a pulse valve and a first pneumatic ball valve. The first air chamber is connected to the purging structure.

[0009] Preferably, the ash collection tank further includes a second air chamber, which is located outside the cylinder. The second air chamber is connected to the second clean air chamber through a second jet pipe, and the air outlet of the second jet pipe is located above the second filter structure.

[0010] Preferably, the housing includes an upper housing and a lower housing, the upper housing being connected to the lower housing, the upper housing having a first air outlet and an upper temperature measuring port, the lower housing having a first air inlet, a lower temperature measuring port and the dust removal port, a first perforated plate being disposed between the upper housing and the lower housing, the space between the upper housing and the first perforated plate being the first clean air chamber, and the space between the lower housing and the first perforated plate being the first stale air chamber.

[0011] Preferably, the ash collection tank includes an upper cylinder and a lower cylinder, the upper cylinder and the lower cylinder are connected, a second perforated plate is provided between the upper cylinder and the lower cylinder, the space between the upper cylinder and the second perforated plate is a second clean air chamber, and the space between the lower cylinder and the second perforated plate is a second turbid air chamber; the second filter structure is a sintered plastic plate, and the upper end of each sintered plastic plate is connected to a through hole on the second perforated plate.

[0012] Preferably, the purging structure includes a plurality of nozzles, each of which is disposed opposite to the dust removal port. The first air tank and each of the nozzles are respectively connected through a purging pipeline, and each purging pipeline is provided with a second solenoid valve and a second pneumatic ball valve.

[0013] Preferably, the first filter structure is a filter bag, and the lower end of each filter bag is connected to a through hole in the first perforated plate; the rapping structure is located above the first filter structure, and each rapping structure includes a cylinder, a spring, and a movable hanger. The cylinder body is connected to the upper housing, and the piston rod of the cylinder is used to push the movable hanger. One end of the spring is connected to a fixed hanger in the upper housing, and the other end of the spring is connected to the movable hanger. The movable hanger is connected to the upper end of the first filter structure.

[0014] Preferably, the dust collector further includes a support and a guide structure, both of which are disposed in the first clean air chamber. The lower end of the support is connected to the first tube sheet, and the upper end of the support is provided with the fixed hanger. The guide structure includes a guide sleeve and a guide rod. The guide sleeve is sleeved on the outside of the guide rod and is connected to the fixed hanger. The guide rod is connected to the movable hanger.

[0015] Preferably, the ash collection structure includes an auger structure, a material collection plate, and a scraper. The material collection plate is sleeved on the outer side of the upper end of the auger main shaft of the auger structure. The outer side of the material collection plate is connected to the ash hopper. The inner side of the material collection plate is rotatably connected to the auger main shaft. The scraper is located above the material collection plate, and the lower end of the scraper contacts the material collection plate. The scraper is sleeved on the outer side of the upper end of the auger main shaft and connected to the auger main shaft. The auger main shaft is rotatably connected to the ash hopper. The lower end of the ash hopper is provided with an ash discharge port, and a rotary valve is provided at the ash discharge port.

[0016] Preferably, the ash collection structure is driven by a drive structure, which includes a geared motor, an outer magnetic rotor, an inner magnetic rotor, a universal joint, and a reducer. The output end of the geared motor is connected to the outer magnetic rotor, the inner magnetic rotor is located inside the outer magnetic rotor, the inner magnetic rotor is connected to the input end of the reducer through the universal joint, and the auger spindle is connected to the output end of the reducer.

[0017] The present invention achieves the following technical effects compared to the prior art:

[0018] Dust-laden gas enters the first turbid gas chamber of the lower housing through the first air inlet of the present invention, and then enters the filter bag through the lower end of the filter bag. The gas filtered by the filter bag is discharged through the first air outlet. Part of the dust in the filter bag falls into the first turbid gas chamber under the action of gravity, and the other part adheres to the inner surface of the filter bag. The filter bag is blown by the gas in the first air bag and vibrated by the rapping structure, so that the adhering material on the inner surface of the filter bag falls into the first turbid gas chamber. The inert gas in the first air bag blows the dust towards the dust removal port and enters the dust collection tank through the dust conveying pipeline. In the dust collection tank, the dust is removed again by the plastic sintering plate. The dust enters the second turbid gas chamber and then falls into the ash hopper, where it is collected by the dust collection structure. The purified gas is discharged through the second air outlet. This invention eliminates the need for manual dust removal, as the entire dust removal process is conducted in a closed environment, avoiding dust generation during operation and preventing secondary pollution of the workshop environment. Furthermore, it employs inert gas for closed-loop transportation and finally connects with other equipment for centralized processing, eliminating the need for dust oxidation, saving time and improving efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the ash collection system of the present invention;

[0021] Figure 2 This is a front view of the dust collector of the present invention;

[0022] Figure 3 This is a side view of the dust collector of the present invention;

[0023] Figure 4 This is a top view of the dust collector of the present invention;

[0024] Figure 5 This is a schematic diagram of the internal structure of the dust collector of the present invention;

[0025] Figure 6 This is a schematic diagram of the ash conveying pipeline of the present invention;

[0026] Figure 7 This is a schematic diagram of the interior of the ash collection tank of the present invention;

[0027] Figure 8 This is a schematic diagram of the driving structure and dust collection structure of the present invention.

[0028] Wherein: A-Dust collector, B-Dust collection tank, 1-Upper shell, 2-Pneumatic control box, 3-Electrical control box, 4-Lower shell, 5-Dust removal port, 6-Second pneumatic ball valve, 7-Second solenoid valve, 8-First air tank, 9-Pulse valve, 10-First pneumatic ball valve, 11-First solenoid valve, 12-First manual ball valve, 13-Lower temperature measuring port, 14-Upper temperature measuring port, 15-Connecting pipeline, 16-Safety valve, 17-Nozzle, 18-First air inlet, 19-First air outlet, 20-Fixed hanger, 21-Cylinder, 22-Cylinder mounting base, 23-Spring, 24-Guide mechanism, 25-Modible hanger, 26-Screw, 27-Filter bag, 28-Bracket 29-First tube sheet, 30-Third pneumatic ball valve, 31-Ash conveying pipeline, 32-Second air outlet, 33-Second tube sheet, 34-Sintered plate, 35-Second air inlet, 36-Gear motor, 37-Scraper, 38-Rotary material valve, 39-Auger main shaft, 40-Material collection plate, 41-Ash hopper, 42-Lower cylinder, 43-Second air tank, 44-Second jetting pipeline, 45-Upper cylinder, 46-Magnetic inner rotor, 47-Flange seat, 48-Magnetic outer rotor, 49-Spacer sleeve, 50-Fixed seat, 51-Magnetic inner rotor fixed seat, 52-Universal shaft, 53-Gear reducer, 54-Gear reducer fixed seat, 55-Main shaft fixed seat, 56-Ash discharge port. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0030] The purpose of this invention is to provide an ash collection system that enables closed-loop conveying of dust and centralized processing through connection with other equipment, thereby solving the problems of low efficiency and easy secondary pollution caused by manual cleaning of ash silos.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 8As shown: This embodiment provides an ash collection system, including an ash discharge dust collector A, an ash conveying pipeline 31, and an ash collection tank B. The ash discharge dust collector A is used for filtration and dust removal at the production end. The ash discharge dust collector A is a dust collector with a blowing structure that discharges ash online via pneumatic conveying. The ash collection tank B is used for dust filtration. The ash discharge dust collector A includes a shell with a first air outlet 19, a first air inlet 18, and a dust removal port 5. The first air inlet 18 is used to connect to external equipment and receive dust-laden gas. The first air outlet 19 is used to connect to a vacuum device, and the filtered gas is discharged through the first air outlet 19. The shell is provided with a first clean air chamber and a first turbid air chamber. The first clean air chamber is equipped with several first filter structures and a rapping structure. The rapping structure is used to rappel the first filter structures. The first turbid air chamber is equipped with a purging structure, which is used to blow the dust filtered by the first filter structures to the dust removal port 5. The dust collection tank B includes a cylinder and a dust bin 41. The cylinder has a second air inlet 35 and a second air outlet 32. The dust removal port 5 is connected to the second air inlet 35 through a dust conveying pipe 31. The cylinder is equipped with a second clean air chamber and a second turbid air chamber. The second turbid air chamber is equipped with a second filter structure. The dust bin 41 is connected to the second turbid air chamber. The dust collection structure is installed in the dust bin 41 to collect dust.

[0033] Specifically, in this embodiment, the ash conveying pipeline 31 can be one or multiple ash conveying pipelines 31. One end of each ash conveying pipeline 31 is connected to an ash discharge dust collector A, and the other end of each ash conveying pipeline 31 is connected to the same ash collection tank B for sealed material conveying between equipment. A third pneumatic ball valve 30 is provided on the ash conveying pipeline 31 for opening or closing the ash conveying pipeline 31.

[0034] In this embodiment, the housing includes an upper housing 1 and a lower housing 4. The upper housing 1 and the lower housing 4 are connected by a flange seal, forming a sealed chamber inside. The upper housing 1 is provided with a first air outlet 19 and an upper temperature measuring port 14. The upper temperature measuring port 14 is located in the middle of the side wall of the upper housing 1 and is used to place a temperature measuring element for monitoring the temperature inside the upper housing 1. The lower housing 4 is provided with a first air inlet 18, a lower temperature measuring port 13 and a dust removal port 5. The lower temperature measuring port 13 is close to the bottom of the lower housing 4 and is used to place a temperature measuring element for monitoring the temperature inside the lower housing 4. A first perforated plate 29 is provided between the upper housing 1 and the lower housing 4. The space between the upper housing 1 and the first perforated plate 29 is the first clean air chamber, and the space between the lower housing 4 and the first perforated plate 29 is the first turbid air chamber.

[0035] In this embodiment, the first filtration structure is a filter bag 27. The lower end of each filter bag 27 is connected to the through hole on the first tube sheet 29, and the filter bag 27 is connected to the first tube sheet 29 by a clamp.

[0036] In this embodiment, the dust collector A further includes a first air tank 8, which is used to hold inert gas. The first air tank 8 is located outside the upper shell 1 and on the same side as the first air outlet 19. A safety valve 16, a first solenoid valve 11, and a first manual ball valve 12 are provided on the first air tank 8. One end of the first jet pipe is located above the filter bag 27. The safety valve 16 installed above the first air tank 8 is used to limit the pressure of the first air tank 8. The first air tank 8 opens and closes the external air supply pipe through the first solenoid valve 11 installed at the air inlet. The first manual ball valve 12 installed below the first air tank 8 is used for maintenance venting and drainage. The first air tank 8 is connected to the first clean air chamber through the first jet pipe. The first air tank 8 provides a continuous and stable air source for jet cleaning. The air outlet of the first jet pipe is located above the first filter structure. A pulse valve 9 and a first pneumatic ball valve 10 are provided on the first jet pipe. The first air tank 8 is also connected to the purging structure.

[0037] In this embodiment, the purging structure includes several nozzles 17, each nozzle 17 being located opposite the dust removal port 5. It is optimal to arrange four nozzles 17 equally within a 60-degree range opposite the dust removal port 5 with the dust removal port 5 as the center point. The first air tank 8 is connected to one end of the connecting pipe 15, and the other end of the connecting pipe 15 is connected to one end of each purging pipe. The other end of each purging pipe is connected to a nozzle 17. The first air tank 8 provides a continuous and stable air source for purging. Each purging pipe is equipped with a second solenoid valve 7 and a second pneumatic ball valve 6.

[0038] In this embodiment, the rapping structure is disposed in the upper housing 1 and located above the filter bag 27. The upper housing 1 also contains four supports 28, the lower end of which is connected to the first perforated plate 29. Three supports 28 are evenly distributed along the outer ring of the first perforated plate 29, and the other support 28 is located at the center of the first perforated plate 29. Each rapping structure includes a cylinder 21, a spring 23, and a movable hanger 25. The cylinder body of the cylinder 21 is connected to the cylinder mounting seat 22 on the upper housing 1 via a flange. The cylinder mounting seat 22 is also connected to the upper housing 1 via a flange. The end face of the cylinder 28 is sealed with the flange mating surface of the cylinder mounting seat 22, isolating the upper housing 1 from the outside atmosphere. Each bracket 28 has a fixed hanger 20 at its upper end, and a movable hanger 25 is located below the fixed hanger 20. The piston rod of the cylinder 21 is used to push the movable hanger 25, but the piston rod of the cylinder 21 is not connected to the movable hanger 25. One end of the spring 23 is connected to the fixed hanger 20, and the other end of the spring 23 is connected to the movable hanger 25. The movable hanger 25 is connected to the upper end of the filter bag 27 by a screw 26. The tightness of the filter bag 27 is controlled by adjusting the screw 26. In this embodiment, the cylinder 21 and spring 23 work together to push or retract the movable hanger 25 in a reciprocating motion, thereby vibrating the filter bag 27 (simple harmonic vibration) and removing the deposits inside the filter bag 27.

[0039] This embodiment includes a guide structure, which includes a guide sleeve and a guide rod. The upper end of the guide sleeve is connected to the fixed hanger 20, and the lower end of the guide rod is connected to the movable hanger 25. The guide sleeve is fitted on the outside of the guide rod, and the upper end of the guide rod extends into the guide sleeve from the lower end of the guide sleeve.

[0040] In this embodiment, there are three movable hangers 25, and each movable hanger 25 corresponds to three guide mechanisms 24, six springs 23 and twelve filter bags 27.

[0041] In this embodiment, the dust collector A further includes a pneumatic control box 2 and an electrical control box 3. Both the pneumatic control box 2 and the electrical control box 3 are located on the outside of the upper housing 1, with the electrical control box located below the pneumatic control box 2. The pneumatic control box 2, the electrical control box 3, and the dust removal port 5 are located on the same side. The pneumatic control box 2 is connected to the inside of the upper housing 1 via a pipeline and is used for controlling the pneumatic components and acquiring data. The electrical control box 3 provides power and control signals to the electrical components of the dust collector A.

[0042] The dust collector A in this embodiment has two working states: filtration state and dust removal state. When in filtration state, only the ash adhering to the inner surface of the filter bag 27 is removed by rapping the structure; when in dust removal state, the filter bag 27 is first purged through the first jet pipe, then the filter bag 27 is removed by rapping the structure, and finally the dust is removed by blowing.

[0043] In this embodiment, the ash collection tank B includes an upper cylinder 45 and a lower cylinder 42, which are connected. The second air outlet 32 ​​is located on the side wall of the end cap of the upper cylinder 45 and is used to transport clean air to the external negative pressure pipeline equipment. The second air inlet 35 is located on the side wall of the lower cylinder 42, below the second filter structure, and is used to connect the ash conveying pipeline 31. A second perforated plate 33 is provided between the upper cylinder 45 and the lower cylinder 42. The space between the upper cylinder 45 and the second perforated plate 33 is the second clean air chamber, and the space between the lower cylinder 42 and the second perforated plate 33 is the second turbid air chamber. The second filter structure is a sintered plate 34, and the upper end of each sintered plate 34 is connected to the through hole on the second perforated plate 33.

[0044] In this embodiment, the second filter structure is a sintered plate 34, which is installed on the second tube sheet 33 by screws 26 and is used to filter dust-containing powder. There are a total of 5 groups of 19 sintered plates 34.

[0045] In this embodiment, the ash collection tank B also includes a second air chamber 43, which is used to hold inert gas. The second air chamber 43 is located on the side wall of the lower shell cylinder and is connected to the second clean air chamber through a second jet pipe 44. A pulse valve is provided on the second jet pipe 44. The second air chamber 43 provides a stable air source for the second jet pipe 44. The air outlet of the second jet pipe 44 is located above the second filter structure. Each plastic plate 34 corresponds to a nozzle on the second jet pipe 44. There are a total of 5 sets of second jet pipes 44.

[0046] In this embodiment, the ash hopper 41 is located below the lower cylinder 42 and is fixed by a flange connection. The ash collection structure inside the ash hopper 41 is driven by a drive structure. The drive structure includes a geared motor 36, a magnetic coupling, a universal joint 52, and a reducer 53. The geared motor 36 is mounted on the flange seat 47 by screws. The flange seat 47 is mounted on the fixed seat 50 by screws. The fixed seat 50 is mounted on the side wall of the ash hopper 41 and communicates with it. The magnetic coupling includes an outer magnetic rotor 48, a spacer 49, and an inner magnetic rotor 46. The spacer 49 separates the outer magnetic rotor 48 and the inner magnetic rotor 46. The spacer 49 and the fixed seat 50 are sealed by the flange end face, isolating the ash hopper 41 from the outside atmosphere. The outer magnetic rotor 48... The inner magnetic rotor 46 transmits torque through magnetic coupling; the outer magnetic rotor 48 is rotatably connected to the flange seat 47 via bearings and is connected to the output end of the geared motor 36 via a keyway; the spacer 49 is installed in the flange seat cavity and mounted on the fixed seat 50 via flange screws; the inner magnetic rotor 46 is rotatably connected to the inner magnetic rotor fixed seat 51 via bearings, and the inner magnetic rotor fixed seat 51 is mounted on the fixed seat 50 via flange screws; the inner magnetic rotor 46 is connected to the universal joint 52 via a keyway; the universal joint 52 connects the reducer 53 and the inner magnetic rotor 46 via a keyway for transmitting torque; the reducer 53 is mounted on the reducer 53 fixed frame via a flange; the reducer fixed seat 51 is installed inside the ash hopper 41.

[0047] In this embodiment, the dust collection structure includes an auger structure, a material collection plate 40, and a scraper 37. The main shaft fixing seat 55 is located above the dust discharge port 56. The auger main shaft 39 of the auger structure is rotatably connected to the main shaft fixing seat 55 and the reducer fixing seat 51 via bearings. The upper end of the auger main shaft 39 is connected to the inside of the reducer 53 via a keyway. The auger structure is used to squeeze and convey dust to the dust discharge port 56. The material collection plate 40 is used to collect the falling dust. The material collection plate 40 is sleeved on the outer side of the upper end of the auger main shaft 39 of the auger structure. The outer side of the material collection plate 40 is connected to the ash hopper 41. The inner side of the material collection plate 40... The material collection plate 40 is rotatably connected to the auger main shaft 39 on the side. It is installed below the reducer fixed seat 51 to separate the ash hopper 41 from the top and bottom. The material collection plate 40 has an opening that communicates with the ash hopper 41 below. The scraper 37 is located above the material collection plate 40. The lower end of the scraper 37 contacts the material collection plate 40. The scraper 37 is installed on the auger main shaft 39 by a key connection and is used to scrape off the material on the material collection plate 40. The lower end of the ash hopper 41 is provided with an ash discharge port 56. A rotary material valve 38 is provided at the ash discharge port 56. The rotary material valve 38 is connected to the ash hopper 41 by a flange and is used to discharge ash from the ash hopper 41.

[0048] This embodiment aims to improve the device structure, while the control process is based on existing technology.

[0049] Specifically, during filtration, the third pneumatic ball valve 30 in the ash conveying pipeline 31 is closed. The dust-laden gas enters the first turbid gas chamber of the lower housing 4 through the first air inlet 18, and enters the filter bag 27 through the lower end of the filter bag 27 fixed on the first tube sheet 29. After filtration, the clean gas is discharged from the first air outlet 19 through the negative pressure generated by the vacuum equipment. Part of the dust falls into the first turbid gas chamber of the lower housing 4 due to gravity, and part of it adheres to the inner surface of the filter bag 27. After working for a period of time, the deposits on the inner surface of the filter bag 27 cause the air permeability resistance of the filter bag 27 to increase. It is necessary to remove the deposits on the inner surface of the filter bag 27 by the vibration structure. At this time, the piston rod of the cylinder 21 extends. Pushing the movable hanger 25 tightens the spring 23, leaving the filter bag 27 in a relaxed state. The piston rod of the cylinder 21 retracts, and the spring 23 quickly pulls the movable hanger 25 back after the piston rod retracts. Since the lower end of the filter bag 27 is fixed to the first tube sheet 29, and the upper end of the filter bag 27 is connected to the movable hanger 25 by screws 26, the filter bag 27 is quickly tightened under the action of the spring 23. The dust on the inner surface of the filter bag 27 is quickly shaken off under the action of inertia and gravity. Through the extension and retraction of the piston rod of the cylinder 21, the filter bag 27 is repeatedly vibrated to remove dust. The three cylinders 21 are started and stopped in sequence to vibrate the movable hanger 25. The vibration and dust removal operation is stopped after several seconds.

[0050] During ash removal operations, the filtration process is stopped after one work cycle. The pipes supplying the dust-laden gas, as well as the valves at the first air inlet 18 and the first air outlet 19, are closed. The first air tank 8 releases high-pressure, high-flow-rate inertial airflow instantaneously and intermittently into the upper housing 1 via the pulse valve 9 and the first pneumatic ball valve 10 along the first jet pipe. The outer surface of the filter bag 27 is impacted by the instantaneous pressure change, causing deformation. The airflow back-blowing the outer surface of the filter bag 27 removes dust from its inner surface, which falls into the first turbid air chamber of the lower housing 4. Then, the filter bag 27 is cleaned again... The ash removal process is performed by vibration for several seconds. The ash discharge operation begins by opening the third pneumatic ball valve 30 on the ash conveying pipeline 31 and simultaneously opening the first solenoid valve 11 to connect to the external air source and enter the first air tank 8. The second solenoid valve 7 and the second pneumatic ball valve 6 on one of the purging pipelines are activated, while the second solenoid valve 7 and the second pneumatic ball valve 6 on the other purging pipelines are not activated. High-speed, high-pressure gas flows through the first air tank 8 and the purging pipeline through the nozzle 17. The airflow causes the accumulated ash to fly up. The four purging pipelines are switched on and off several times in sequence. The dust removal port 5 connects to the ash conveying pipeline 31, the ash collection tank B, and the external negative pressure pipeline. There is a pressure difference between the ash removal port 5 and the first turbid air chamber of the lower shell 4. The airflow carrying dust passes through the ash conveying pipeline 31 connected to the dust removal port 5 and is then filtered by the plastic sintered plate 34 in the ash collection tank. Due to gravity, the dust falls into the ash hopper 41. The filtered airflow is discharged through the external negative pressure pipeline. Similarly, the remaining second solenoid valves 7 and second pneumatic ball valves 6 on the other blowing pipelines are started and stopped in sequence to blow the ash accumulated in the first turbid air chamber of the lower shell 4. The blowing pipeline, the ash conveying pipeline 31, the ash collection tank B, and the external negative pressure pipeline work together to complete one ash discharge operation, realizing the closed pipeline transportation of dust.

[0051] When the dust in the ash hopper 41 accumulates to a certain amount, the negative pressure ash conveying operation is stopped. The third pneumatic ball valve 30 in the ash conveying pipeline 3134 is closed, and the external negative pressure pipeline valve is closed. The second jet pipeline 44 is connected to the inert gas in the second jet air tank 43, and the gas is sprayed onto the sintered plate 34 through the second jet pipeline 44. Utilizing the instantaneous high and low pressure switching, the airflow continuously acts on the inner wall of the sintered plate 34. Due to the instantaneous backflow, the dust adhering to the outer wall of the sintered plate 34 is blown away and falls into the ash hopper 41 due to gravity. After the ash collection tank B is completed, the rotary material valve 38 is started, and the reduction motor 36 is started to begin the ash unloading operation. The reduction motor 36 transmits torque to the magnetic outer rotor 48, which transmits torque to the magnetic inner rotor 46 through magnetic force. The magnetic inner rotor 46 and the universal joint 52 amplify the torque through the reducer 53 and transmit it to the auger main shaft 39. The rotation of the auger shaft 39 drives the scraper 37 to rotate. The scraper 37 scrapes off the material on the material collection plate 40, and the material falls into the lower part of the ash hopper 41 through the material collection plate 40's inlet. Under the action of the auger shaft 39, the accumulated ash is squeezed downward and conveyed to the ash discharge port 56. The accumulated ash in the ash hopper 41 is continuously discharged downward, and the unoxidized ash is collected in a sealed and centralized manner in the corresponding equipment.

[0052] This embodiment boasts high conveying efficiency, enabling conveying within a closed environment. It achieves automated dust removal and centralized dust collection, saving enterprises manpower, time, and equipment costs, improving the workshop working environment, and reducing environmental pollution. This embodiment solves the problems of low efficiency and potential secondary pollution associated with manual cleaning of dust collector ash hoppers, significantly reducing secondary pollution to the working environment and greatly improving it. It represents another step forward for enterprises in building smart factories.

[0053] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A dust collection system, characterized in that: The system includes a dust collector, a dust conveying pipeline, and a dust collection tank. The dust collector includes a shell with a first air outlet, a first air inlet, and a dust removal port. The shell contains a first clean air chamber and a first turbid air chamber. The first clean air chamber contains several first filter structures and a rapping structure, the rapping structure being used to vibrate the first filter structures. The first turbid air chamber contains a purging structure, which blows the dust filtered by the first filter structures to the dust removal port. The dust collection tank includes a cylindrical body and a dust bin. The cylindrical body has a second air inlet and a second air outlet. The dust removal port and the second air inlet are connected via the dust conveying pipeline. The cylindrical body contains a second clean air chamber and a second turbid air chamber. The second turbid air chamber contains a second filter structure. The dust bin is connected to the second turbid air chamber and contains a dust collection structure for collecting dust. One end of each of the ash conveying pipelines is connected to one of the ash discharge dust collectors, and the other end of each of the ash conveying pipelines is connected to the same ash collection tank for sealed material conveying between equipment: a third pneumatic ball valve is provided on each ash conveying pipeline for opening or closing the ash conveying pipeline; The dust collector further includes a first air chamber, which is connected to the first clean air chamber via a first jet pipe. The outlet of the first jet pipe is located above the first filter structure. The housing includes an upper housing and a lower housing, which are connected. The upper housing has a first air outlet, and the lower housing has a first air inlet and a dust removal outlet. A first tube sheet is provided between the upper housing and the lower housing. The space between the upper housing and the first tube sheet is the first clean air chamber, and the space between the lower housing and the first tube sheet is the first turbid air chamber. The first air tank is connected to the purging structure, which includes a plurality of nozzles, each of which is located opposite the dust removal port. The first air tank and each of the nozzles are connected through a purging pipeline. The first filtration structure is a filter bag, and the lower end of each filter bag is connected to a through hole on the first perforated plate; the vibrating structure is located above the first filtration structure. The ash collection tank includes an upper cylinder and a lower cylinder connected together. A second perforated plate is disposed between the upper cylinder and the lower cylinder. The space between the upper cylinder and the second perforated plate is a second clean air chamber, and the space between the lower cylinder and the second perforated plate is a second turbid air chamber. The second filter structure is a sintered plastic plate, and the upper end of each sintered plastic plate is connected to a through hole on the second perforated plate. The ash collection tank also includes a second air tank, which is connected to the second clean air chamber through a second jet pipe. The air outlet of the second jet pipe is located above the second filter structure. During filtration, the third pneumatic ball valve in the ash conveying pipeline is closed, and the dust-containing... Gas enters the first turbid gas chamber of the lower housing through the first air inlet, and enters the filter bag through the lower end of the filter bag fixed on the first tube sheet. After filtration, the clean gas is discharged from the first air outlet through the negative pressure generated by the vacuum device. Part of the dust falls into the first turbid gas chamber of the lower housing due to gravity, and part of it adheres to the inner surface of the filter bag. After working for a period of time, the deposits on the inner surface of the filter bag increase the air permeability resistance of the filter bag. The deposits on the inner surface of the filter bag are removed by the rapping structure. The dust on the inner surface of the filter bag is shaken off under the action of inertia and gravity, and the rapping dust removal operation is repeatedly realized by the rapping of the filter bag. The rapping dust removal operation stops after several seconds. During ash removal operations, after one work cycle, the filtration operation is stopped, and the pipes supplying the dust-laden gas, as well as the valves of the first air inlet and the first air outlet, are closed. The first air tank releases inert airflow into the upper housing along the first jet pipe. The outer surface of the filter bag is impacted by a sudden pressure change, causing the filter bag to deform under pressure. The airflow back-blowing against the outer surface of the filter bag removes dust from the inner surface of the filter bag, and the dust falls into the first turbid air chamber of the lower housing. Then, the filter bag is vibrated again for ash removal for several seconds. Ash removal operations begin by opening the third pneumatic ball valve on the ash conveying pipe and starting the ash removal process. The second solenoid valve and the second pneumatic ball valve on one of the purge pipelines are not in operation. The gas flows through the first air bag, the purge pipeline and the nozzle. The airflow carries the accumulated dust and makes it fly. The purge pipeline is switched on and off several times in sequence. The dust removal port is connected to the ash conveying pipeline, the ash collection tank and the external negative pressure pipeline. There is a pressure difference between the port and the first turbid air chamber of the lower shell. The airflow carrying dust passes through the ash conveying pipeline connected to the dust removal port and is then filtered by the plastic sintered plate in the ash collection tank. The dust falls into the ash hopper due to gravity. The filtered airflow is discharged through the external negative pressure pipeline. Similarly, the remaining purging pipelines are started and stopped in sequence to purge the ash accumulated in the first turbid gas chamber in the lower shell. The purging pipeline, the ash conveying pipeline, the ash collection tank, and the external negative pressure pipeline work together to complete one ash discharge operation, realizing the closed pipeline transportation of dust. When the dust in the ash silo accumulates to a certain amount, the negative pressure ash conveying operation is stopped; the third pneumatic ball valve in the ash conveying pipeline is closed, and the external negative pressure pipeline valve is closed; the second jet pipeline is connected, and inert gas in the second air tank is jetted onto the sintered plastic plate through the second jet pipeline. Utilizing instantaneous high and low pressure switching, the airflow continuously acts on the inner wall of the sintered plastic plate. Under the instantaneous back-blowing action of the airflow, the dust adhering to the outer wall of the sintered plastic plate is blown away and falls into the ash silo under gravity; after the ash collection tank is completed, the ash unloading operation begins; The ash collection structure includes an auger structure, a material collection plate, and a scraper. The material collection plate is sleeved on the outer side of the upper end of the auger main shaft of the auger structure. The outer side of the material collection plate is connected to the ash hopper. The inner side of the material collection plate is rotatably connected to the auger main shaft. The scraper is positioned above the material collection plate. The lower end of the scraper contacts the material collection plate. The scraper is sleeved on the outer side of the upper end of the auger main shaft and is connected to the auger main shaft. The auger main shaft is rotatably connected to the ash hopper. The lower end of the ash hopper is provided with an ash discharge port, and a rotary valve is provided at the ash discharge port. The ash collection structure is driven by a drive structure, which includes a geared motor, an outer magnetic rotor, an inner magnetic rotor, a universal joint, and a reducer. The output end of the geared motor is connected to the outer magnetic rotor, the inner magnetic rotor is located inside the outer magnetic rotor, the inner magnetic rotor is connected to the input end of the reducer through the universal joint, and the auger spindle is connected to the output end of the reducer.

2. The ash collection system according to claim 1, characterized in that: The first air bag is located outside the housing. The first air bag is equipped with a safety valve, a first solenoid valve and a first manual ball valve. The first jet pipe is equipped with a pulse valve and a first pneumatic ball valve.

3. The ash collection system according to claim 1, characterized in that: The second air bag is located outside the cylinder.

4. The ash collection system according to claim 1, characterized in that: The upper housing has an upper temperature measuring port, and the lower housing has a lower temperature measuring port.

5. The ash collection system according to claim 1, characterized in that: Each purging pipeline is equipped with a second solenoid valve and a second pneumatic ball valve.

6. The ash collection system according to claim 1, characterized in that: Each of the aforementioned rapping structures includes a cylinder, a spring, and a movable hanger. The cylinder body is connected to the upper housing, and the piston rod of the cylinder is used to push the movable hanger. One end of the spring is connected to a fixed hanger in the upper housing, and the other end of the spring is connected to the movable hanger. The movable hanger is connected to the upper end of the first filter structure.

7. The ash collection system according to claim 6, characterized in that: The dust collector also includes a support and a guide structure. Both the support and the guide structure are disposed in the first clean air chamber. The lower end of the support is connected to the first tube sheet, and the upper end of the support is provided with the fixed hanger. The guide structure includes a guide sleeve and a guide rod. The guide sleeve is sleeved on the outside of the guide rod and is connected to the fixed hanger. The guide rod is connected to the movable hanger.

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