Ash removal device and dust collector for filter cartridges
By combining a retractable corrugated tubular filter element with an electromagnetic suction component, the filter element achieves self-vibration cleaning, solving the safety hazards and air compressor dependence issues of dry cartridge dust collectors, and improving the safety and reliability of the dust collector.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUODIAN PENGLAI POWER GENERATION CO LTD
- Filing Date
- 2022-10-14
- Publication Date
- 2026-08-04
AI Technical Summary
Existing dry cartridge dust collectors pose safety hazards during the dust removal process and are highly dependent on air compressors, increasing costs and installation limitations, making it difficult to meet the demand for efficient and safe indoor coal dust control.
It adopts a corrugated tubular filter element structure that can extend and retract in the vertical direction, combined with an electromagnetic suction component and elastic connection. The movement of the slip ring is controlled by the on and off of the electromagnetic suction component, so as to realize the self-vibration and dust removal of the filter element, avoiding external energy input and mechanical damage.
It achieves efficient and safe filter cleaning, reduces safety hazards, reduces dependence on air compressors, extends filter life, and improves the stability and applicability of dust collectors.
Smart Images
Figure CN115708980B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of coal dust control technology, specifically to a filter element cleaning device and a dust collector. Background Technology
[0002] To achieve the higher goals of eliminating exhaust vents in workshops or factories and minimizing indoor emissions of treated gases, higher requirements are placed on coal dust treatment technologies. However, simple dust reduction or suppression measures are insufficient to meet current needs.
[0003] In related technologies, indoor fugitive coal dust control typically utilizes devices such as bag filters, wet scrubbers, wet electrostatic precipitators, and dry cartridge filters. However, bag filters have low treatment efficiency, wet scrubbers generate secondary wastewater pollution, and wet electrostatic precipitators have complex structures, high-voltage discharge, and certain safety hazards. These shortcomings limit the large-scale application of these dust collection devices in indoor fugitive coal dust control.
[0004] Dry cartridge dust collectors are a type of filtration dust collector, operating on a similar principle to baghouse dust collectors. They feature a pleated cartridge structure and typically employ pulse-jet cleaning. During pulse-jet cleaning, a high-concentration dust-air mixing zone forms on the outside of the cartridge. When the dust is flammable or explosive (such as coal dust, especially lignite dust), there is a risk of deflagration. Current solutions focus on improving the flame retardant and antistatic properties of the filter element. For example, the antistatic properties of the filter media must meet the requirements of JB / T 10341-2014, and the flame retardant performance of the filter element must meet the UL94 HF-1 standard. However, this method does not fundamentally address the aforementioned safety hazards and significantly increases the cost of the cartridge.
[0005] Meanwhile, pulse cleaning requires compressed air. When the plant has a centralized air source, an air supply pipeline needs to be set up, which increases costs. When the plant does not have a centralized air source, an air compressor needs to be set up separately. Air compressors are vibrating devices with a high failure rate, and there are also certain requirements for the installation location. All of these factors limit the application of cartridge dust collectors in certain scenarios. Summary of the Invention
[0006] The first objective of this disclosure is to provide a filter element cleaning device that can at least partially solve the technical problems existing in the related art.
[0007] A second object of this disclosure is to provide a dust collector equipped with the dust removal device provided in this disclosure.
[0008] To achieve the above objectives, a first aspect of this disclosure provides a dust removal device for a filter element, the filter element being configured as a corrugated tubular structure capable of extending and retracting in a vertical direction, the dust removal device being used to clean dust on a first sidewall of the filter element, and the dust removal device comprising:
[0009] Guide rod, extending vertically;
[0010] A top cover plate is installed on top of the guide rod for connection to the top of the filter element;
[0011] The base is connected to the bottom end of the guide rod; and
[0012] A movable slip ring is slidably fitted onto the outside of the guide rod and connected to the first sidewall.
[0013] The movable slip ring and the base are elastically connected, and an electromagnetic attraction component is provided between the opposite sides of the base and the movable slip ring. The movable slip ring is configured such that when the electromagnetic attraction component is energized, it can be magnetically attracted and move towards the base, and when the electromagnetic attraction component is de-energized, it can elastically return to its original position away from the base.
[0014] Optionally, the electromagnetic attraction assembly includes a magnetic block mounted on the moving slip ring and an electromagnet positioned on the base corresponding to the position of the magnetic block.
[0015] Optionally, the distance d1 between the electromagnet and the magnetic block is no greater than 1cm to 5cm.
[0016] Optionally, the dust removal device further includes a power control box for electrical connection with the electromagnet, the power control box being configured to control the switching of the electromagnet's power on and off and the duration of the power on and off.
[0017] Optionally, the outer diameter of the corrugated tubular structure gradually decreases from top to bottom.
[0018] Optionally, the movable slip ring is connected to the first sidewall via a connecting rod, which is connected to the bottommost corrugation of the first sidewall.
[0019] Optionally, the dust removal device further includes a compression spring that is elastically connected between the movable slip ring and the base and sleeved on the outside of the guide rod.
[0020] Optionally, the top cover is constructed as an annular structure with an inner diameter not less than the inner diameter of the upper hole of the filter element.
[0021] A second aspect of this disclosure provides a dust collector comprising a first chamber, a second chamber, and a third chamber arranged sequentially from top to bottom. The second chamber is provided with a filter element and a dust removal device for the filter element. The first chamber is used to receive clean gas filtered by the filter element, and the third chamber is used to receive dust removed by the dust removal device, wherein the dust removal device is the dust removal device according to the above description.
[0022] Optionally, the dust collector includes an upper top plate for separating the first chamber and the second chamber, and a lower bottom plate for separating the second chamber and the third chamber, the top cover plate being mounted on the upper top plate, and the base plate being mounted on the lower bottom plate.
[0023] Optionally, the second chamber includes a second sidewall disposed on the outer periphery of the filter element, the second sidewall having an air inlet opening towards the first sidewall for the gas to be dusted to enter, and the first chamber including a third sidewall disposed horizontally on the opposite side of the second sidewall, the third sidewall having an exhaust port for the clean gas to be discharged.
[0024] Optionally, a plurality of filter holes are formed on the bottom plate so that dust on the first sidewall can fall into the third chamber through the filter holes.
[0025] Through the above technical solution, using the filter element cleaning device provided in this disclosure, the top of the filter element is kept relatively fixed to the top of the guide rod by the top cover plate, and the movable slip ring can slide up and down along the guide rod through the elastic connection between the movable slip ring and the base and the electromagnetic attraction assembly, thereby allowing the first sidewall of the filter element to be compressed and extended along the guide rod. When the electromagnetic attraction assembly is energized, the first sidewall is pulled downward; when the electromagnetic attraction assembly is de-energized, the first sidewall is repeatedly compressed and extended during the upward rebound process due to the upward elastic return force of the movable slip ring, the upward retraction force of the filter element itself, and the gravity of the filter element itself, thereby causing the filter element to vibrate and achieving efficient cleaning of the filter element.
[0026] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0027] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0028] Figure 1 This is a schematic diagram of the structure of the dust removal device provided in an exemplary embodiment of this disclosure;
[0029] Figure 2 This is a front view of the dust removal device provided in an exemplary embodiment of this disclosure;
[0030] Figure 3 This is a partial structural schematic diagram of the dust removal device provided in an exemplary embodiment of this disclosure;
[0031] Figure 4 This is a schematic diagram of the structure of a dust collector provided in an exemplary embodiment of this disclosure.
[0032] Explanation of reference numerals in the attached figures
[0033] 10-Filter element; 10a-Bottom layer corrugated; 11-First sidewall; 12-Upper hole; 13-Lower hole; 21-Guide rod; 22-Top cover plate; 22a-Bolt hole; 23-Base; 24-Moving slip ring; 24a-Connecting rod; 25-Compression spring; 30-Electromagnetic attraction assembly; 31-Magnetic block; 32-Electromagnet; 33-Power control box; 34-Coil; 34a-Coil inlet; 34b-Coil return; 41-First chamber; 41a-Third sidewall; 41b-Exhaust port; 42-Second chamber; 42a-Second sidewall; 42b-Air inlet; 43-Third chamber; 44-Upper top plate; 45-Lower bottom plate; 45a-Filter hole. Detailed Implementation
[0034] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0035] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to the outline of the corresponding component itself; directional terms such as "upper," "lower," "top," "bottom," "horizontal," and "vertical" are based on... Figure 2 The terms used in this disclosure, such as "first" and "second," are for distinguishing one element from another and do not imply any order or importance. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings denote the same or similar elements.
[0036] Reference Figures 1-3 This disclosure provides a dust removal device for a filter element. The filter element 10 is configured as a corrugated tubular structure that can extend and retract in a vertical direction. The filter element 10 may include a first sidewall 11, which is the circumferential wall of the corrugated tubular structure. The dust removal device can be used to clean the dust on the first sidewall 11 of the filter element 10, specifically to clean the dust remaining on the outer side of the first sidewall 11 after filtering coal dust. The dust removal device may include a guide rod 21, a top cover plate 22, a base 23, and a sliding ring 24.
[0037] like Figure 2As shown, the guide rod 21 can extend vertically, and its extension length can match the length of the filter element 10 when fully extended, for example, 500-1200mm. A top cover plate 22 can be installed on the top of the guide rod 21 for connection to the top of the filter element 10 and for relative fixation to the top of the filter element 10. A base 23 can be connected to the bottom end of the guide rod 21 to support it and ensure its stability. A movable slip ring 24 is slidably fitted onto the outside of the guide rod 21 and connected to the first sidewall 11. When the movable slip ring 24 slides along the guide rod 21, while the top of the filter element 10 remains relatively fixed to the top of the guide rod 21, it can drive the first sidewall 11 to extend and retract along the guide rod 21, ensuring the extension and retraction effect and stability of the first sidewall 11. According to some embodiments provided in this disclosure, there can be multiple guide rods 21, for example, 2 to 8 rods. Multiple guide rods 21 are evenly spaced along the circumferential direction on the outer periphery of the first sidewall 11. The annular surface of the movable slip ring 24 is provided with through holes for the guide rods 21 to pass through, thereby effectively ensuring the stability of the movable slip ring 24 when it moves along the guide rods 21.
[0038] The movable slip ring 24 and the base 23 can be elastically connected, and an electromagnetic attraction assembly 30 can be provided between the opposite sides of the base 23 and the movable slip ring 24. This assembly can be configured such that when the electromagnetic attraction assembly 30 is energized, the movable slip ring 24 can be magnetically attracted and moved towards the base 23, thereby causing the first sidewall 11 to extend along the extension direction of the guide rod 21. Since the filter element 10 is corrugated, this also gives the first sidewall 11 a retracting force. When the electromagnetic attraction assembly 30 is de-energized, the magnetic attraction between the base 23 and the movable slip ring 24 disappears, and under the elastic action, the movable slip ring 24... 4. It can elastically return to its original position away from the base 23. The first sidewall 11 can retract along the guide rod 21 by the elastic return force of the moving slip ring 24 and the retraction force of the filter element 10 itself. After the electromagnetic suction assembly 30 is de-energized, the magnetic attraction between the moving slip ring 24 and the base 23 disappears. Under the action of the elastic return force, the retraction force of the filter element 10 itself and the gravity of the filter element 10 itself, the first sidewall 11 can be repeatedly compressed and stretched along the guide rod 21, thereby causing the filter element 10 to shake and the coal dust on the first sidewall 11 to be shaken off, so as to complete the cleaning of the dust on the first sidewall 11.
[0039] Through the above technical solution, using the dust removal device for filter element 10 provided in this disclosure, the top of filter element 10 is kept relatively fixed to the top of guide rod 21 by the top cover plate 22, and the elastic connection between the movable slip ring 24 and the base 23 and the electromagnetic attraction assembly 30 allow the movable slip ring 24 to slide up and down along the guide rod 21, thereby allowing the first sidewall 11 of filter element 10 to be compressed and extended along the guide rod 21. When the electromagnetic attraction assembly is energized, the first sidewall 11 is pulled downward; when the electromagnetic attraction assembly 30 is de-energized, the first sidewall 11 is repeatedly compressed and extended during the upward rebound process due to the upward elastic return force of the movable slip ring 24, the upward retraction force of the filter element 10 itself, and the gravity of the filter element 10, causing the filter element 10 to vibrate and achieving efficient dust removal of the filter element 10. The dust removal device provided in this disclosure does not require external energy input during operation, resulting in significant energy-saving effects. This invention achieves self-vibrating dust removal of the filter element 10 via electromagnetic drive, completely eliminating the safety hazards caused by the introduction of large amounts of air during traditional pulse cleaning. It also eliminates the dry cartridge dust collector's dependence on an air compressor, significantly improving the safety, stability, and applicability of the cartridge dust collector. Simultaneously, the magnetic force generated by the energized electromagnetic suction component 30 is applied to the stretching and contraction of the filter element 10, making control convenient, simple, efficient, and intelligent. Furthermore, in this embodiment, the method of stretching and contracting the filter element 10 vertically to cause it to vibrate is less mechanically damaging than the circumferential expansion and contraction method used in pulse cleaning, thus extending the service life of the filter element 10.
[0040] Reference Figures 1-3 The electromagnetic attraction assembly 30 may include a magnetic block 31 and an electromagnet 32. The magnetic block 31 may be mounted on the movable slip ring 24, and the electromagnet 32 may be positioned on the base 23 corresponding to the position of the magnetic block 31.
[0041] Reference Figure 3The dust removal device may also include a power control box 33 for electrical connection with the electromagnet 32. The power control box 33 can be configured to control the switching of the electromagnet 32 on and off and the duration of the on and off, so as to adjust the extension frequency and duration of the first sidewall 11 according to the specific situation of the filter element 10, thereby improving the versatility of the dust removal device. For example, the de-energization time of the electromagnet 32 can be set to 80s, at which time the electromagnet 32 and the magnetic block 31 have no magnetic attraction. The energization time can be 1.5s, at which time the electromagnet 32 and the magnetic block 31 are attracted. When using the dust removal device in this embodiment, the power control box 33 can first energize the electromagnet 32, causing the first sidewall 11 to extend downwards until it reaches its maximum stroke. For example, after 1.5 seconds of energization, the first sidewall 11 can extend to its maximum stroke. Then, the power to the electromagnet 32 is turned off. The first sidewall 11 will rebound under the elastic action of the elastic connection between the slip ring 24 and the base 23, and will continuously shake up and down under this elastic action until the filter element 10 remains completely still. For example, in this embodiment, the filter element 10 will remain still after 80 seconds. At this time, the electromagnet 32 can be energized again to repeat the above process. In some embodiments provided by this disclosure, a coil 34 is wound on the electromagnet 32. The two ends of the coil 34 are respectively formed as a coil inlet 34a and a coil return 34b and connected to the power control box 33, so that the electromagnet 32 has a magnetic attraction force when energized. The power supply voltage level of the electromagnet 32 can be 220V / °AC or 24V / °AC.
[0042] According to some embodiments provided in this disclosure, there can be multiple magnetic blocks 31 and electromagnets 32. For example, there can be six magnetic blocks 31 and six electromagnets 32. These multiple magnetic blocks 31 and electromagnets 32 can be evenly spaced along the circumference, effectively improving the magnetic attraction strength of the electromagnetic attraction assembly 30 when energized, and ensuring that the first sidewall 11 can quickly and completely unfold when the magnetic blocks 31 and electromagnets 32 are magnetically attracted. Figure 2 As shown, the outer diameter of the movable slip ring 24 can be matched with the outer diameter of the base 23, thereby ensuring that when the electromagnetic attraction assembly 30 is energized, the corresponding magnetic block 31 and electromagnet 32 are more precisely attracted to each other.
[0043] Meanwhile, multiple magnetic blocks 31 can increase the gravity of the movable slip ring 24, thereby increasing the falling rate of the movable slip ring 24 when the electromagnetic attraction assembly 30 elastically returns to its original position. This increases the frequency at which the movable slip ring 24 drives the first sidewall 11 to vibrate up and down during the rebound process. It should be noted that the elastic force of the elastic connection between the movable slip ring 24 and the base 23 can always overcome the gravity of the movable slip ring 24, ensuring that the movable slip ring 24 can be bounced away from the base 23 when the electromagnetic attraction assembly 30 is de-energized.
[0044] According to some embodiments provided in this disclosure, the magnetic block 31 can be made of metals such as iron, cobalt, and nickel, or alloys of metals such as iron, cobalt, and nickel, which can ensure the magnetism of the magnetic block 31.
[0045] Reference Figure 3 The distance d1 between the electromagnet 32 and the magnetic block 31 is no greater than 1cm to 5cm, for example, it can be 2cm or 4cm. Within this range, the attraction effect between the electromagnet 32 and the magnetic block 31 can be guaranteed when the electromagnet 32 is energized.
[0046] Reference Figure 1 and Figure 2 The outer diameter of the corrugated tubular structure can gradually decrease from top to bottom, which can prevent dust from falling onto the upper corrugations from being blocked by the lower corrugations, thus ensuring the dust removal effect and ensuring the reliability of the connection between the top of the filter element 10 and the top cover plate 22. According to some embodiments provided in this disclosure, the diameter of the topmost corrugation of the filter element 10 can be 500 mm, the diameter of the bottommost corrugation can be 300 mm, and the spacing d2 between two adjacent corrugations can be 30 mm to ensure the dust falling effect. According to some embodiments provided in this disclosure, the outer diameter of the top cover plate 22 can match the outer diameter of the topmost corrugation of the filter element 10 to ensure the connection effect between the top cover plate 22 and the filter element 10. Correspondingly, the outer diameter of the base 23 can match the outer diameter of the top cover plate 22, thereby ensuring the reliability of the base 23 in supporting the guide rod 21 and the top cover plate 22.
[0047] Reference Figure 1 and Figure 2 The movable slip ring 24 can be connected to the first sidewall 11 via a connecting rod 24a, ensuring the reliability of the connection between the movable slip ring 24 and the filter element 10, and the synchronization of the movement of the filter element 10 and the movable slip ring 24. According to some embodiments provided in this disclosure, multiple connecting rods 24a can be evenly arranged circumferentially to further improve the connection strength between the movable slip ring 24 and the first sidewall 11. The connecting rod 24a can be connected to the bottommost corrugation 10a of the first sidewall 11 so that when the movable slip ring 24 moves up and down along the guide rod 21, it can drive the filter element 10 to extend and retract as a whole, so that the dust on the first sidewall 11 is cleaned more thoroughly and the filtration effect of the filter element 10 on the dust-collecting gas is guaranteed.
[0048] Reference Figure 1 and Figure 2 The dust removal device also includes a compression spring 25 that is elastically connected between the movable slip ring 24 and the base 23 and sleeved on the outside of the guide rod 21. This improves the stability of the compression spring 25 installation and ensures that the compression spring 25 will not shift during compression and extension, thereby guaranteeing the stability and reliability of the dust removal device during use. Furthermore, using the compression spring 25 to achieve an elastic connection between the movable slip ring 24 and the base 23 is easy to install, simple to implement, and cost-effective.
[0049] Reference Figure 1 The top cover plate 22 is constructed as an annular structure with an inner diameter not less than the inner diameter of the upper hole 12 of the filter element 10, thereby ensuring that the purified gas after the filter element 10 is purified can be smoothly discharged through the top cover plate 22.
[0050] Reference Figure 1 , Figure 2 as well as Figure 4 A second aspect of this disclosure also provides a dust collector comprising a first chamber 41, a second chamber 42, and a third chamber 43 arranged sequentially from top to bottom. The second chamber 42 may house a filter element 10 and a cleaning device for the filter element 10. The first chamber 41 can receive clean gas filtered by the filter element 10, and the third chamber 43 can receive dust cleaned by the cleaning device, wherein the cleaning device is the one described above. This dust collector possesses all the beneficial effects of the cleaning device provided in this disclosure, which will not be elaborated further here.
[0051] Reference Figure 1 and Figure 4 The dust collector may include an upper top plate 44 for separating the first chamber 41 and the second chamber 42, and a lower bottom plate 45 for separating the second chamber 42 and the third chamber 43. A top cover plate 22 is mounted on the upper top plate 44, and a base 23 is mounted on the lower bottom plate 45, thereby ensuring the reliability of the installation position of the dust removal device and ensuring the dust removal effect of the dust removal device on the filter element 10. According to some embodiments provided in this disclosure, a radially protruding mounting piece may be formed on the outer edge of the top cover plate 22. The mounting piece has bolt holes 22a, and bolts pass through the bolt holes 22a and are fixed to the upper top plate 44. This achieves a detachable connection between the top cover plate 22 and the upper top plate 44 while ensuring the reliability of the connection between the top cover plate 22 and the upper top plate 44. According to some embodiments provided in this disclosure, multiple mounting pieces may be formed along the outer periphery of the top cover plate 22, and bolt holes 22a are formed on each of the multiple mounting pieces to further improve the connection strength between the dust removal device and the upper top plate 44.
[0052] Reference Figure 4The second chamber 42 may include a second sidewall 42a disposed on the outer periphery of the filter element 10. The second sidewall 42a has an air inlet 42b opening towards the first sidewall 11 to allow the gas to be dusted to pass through. When the gas is introduced, it can pass through the first sidewall 11 at most, thereby ensuring the dust removal effect on the gas. The first chamber 41 includes a third sidewall 41a disposed horizontally on the opposite side of the second sidewall 42a. The third sidewall 41a has an exhaust port 41b for the clean gas to be discharged, extending the flow path of the gas to be dusted, so that the gas to be dusted is purified more thoroughly. According to some embodiments provided in this disclosure, multiple sets of filter elements 10 equipped with dust removal devices may be disposed at intervals in the second chamber 42, thereby achieving efficient gas dust removal.
[0053] Reference Figure 4 Multiple filter holes 45a are formed on the lower base plate 45 to allow dust on the first sidewall 11 to fall into the third chamber 43 through the filter holes 45a, preventing dust accumulation in the second chamber 42 from affecting the dust removal effect, facilitating the dust collection device, and making subsequent unified treatment convenient. The inner diameter of the third chamber 43 can gradually decrease from top to bottom, which can effectively accelerate the falling rate of dust, thereby improving the dust treatment efficiency. According to some embodiments provided in this disclosure, the filter holes 45a on the lower base plate 45 can be constructed as circular through holes or square holes. This disclosure does not limit the specific shape of the filter holes 45a, as long as it can ensure that the dust falls into the third chamber 43 quickly and that the lower base plate 45 has sufficient support strength for the dust removal device and the filter element 10. The third chamber 43 is constructed as a cavity that gradually narrows from top to bottom, so that its sidewalls are inclined to guide the dust to fall to the bottom of the third chamber 43.
[0054] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.
[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.
[0056] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.
Claims
1. A soot cleaning device for a filter cartridge, the soot cleaning device comprising: The filter element is configured as a corrugated tubular structure that can extend and retract in a vertical direction. The dust removal device is used to clean dust on the first sidewall of the filter element, and the dust removal device includes: Guide rod, extending vertically; A top cover plate is installed on top of the guide rod for connection to the top of the filter element; The base is connected to the bottom end of the guide rod; and A movable slip ring is slidably fitted onto the outside of the guide rod and connected to the first sidewall via a connecting rod, the connecting rod being connected to the bottommost corrugation of the first sidewall. The movable slip ring and the base are elastically connected, and an electromagnetic attraction assembly is provided between the opposite sides of the base and the movable slip ring. When the electromagnetic attraction assembly is energized, the movable slip ring can be magnetically attracted and moved towards the base. When the electromagnetic attraction assembly is de-energized, the movable slip ring can elastically return to its original position away from the base under the combined action of the elastic return force of the elastic connection and the retraction force of the filter element itself.
2. The soot cleaning device of claim 1, wherein The electromagnetic attraction assembly includes a magnetic block mounted on the moving slip ring and an electromagnet positioned on the base corresponding to the position of the magnetic block.
3. The soot cleaning device of claim 2, wherein The distance d1 between the electromagnet and the magnetic block is no greater than 1cm to 5cm.
4. The ash cleaning device of claim 2, wherein The dust removal device also includes a power control box for electrical connection with the electromagnet, the power control box being configured to control the switching of the electromagnet on and off and the duration of the on and off states.
5. The dust removal device according to claim 1, characterized in that, The outer diameter of the corrugated tubular structure gradually decreases from top to bottom.
6. The dust removal device according to claim 1, characterized in that, The dust removal device also includes a compression spring that is elastically connected between the moving slip ring and the base and sleeved on the outside of the guide rod.
7. The dust removal device according to claim 1, characterized in that, The top cover is constructed as an annular structure with an inner diameter not less than the inner diameter of the upper hole of the filter element.
8. A dust collector, characterized in that, The dust collector includes a first chamber, a second chamber, and a third chamber arranged sequentially from top to bottom. The second chamber is provided with a filter element and a dust removal device for the filter element. The first chamber is used to receive clean gas filtered by the filter element. The third chamber is used to receive dust removed by the dust removal device. The dust removal device is the dust removal device according to any one of claims 1-7.
9. The dust collector according to claim 8, characterized in that, The dust collector includes an upper top plate for separating the first chamber and the second chamber, and a lower bottom plate for separating the second chamber and the third chamber. The top cover is mounted on the upper top plate, and the base is mounted on the lower bottom plate.
10. The dust collector according to claim 8, characterized in that, The second chamber includes a second sidewall disposed on the outer periphery of the filter element. The second sidewall has an air inlet opening facing the first sidewall for the gas to be removed to pass through. The first chamber includes a third sidewall disposed horizontally on the opposite side of the second sidewall. The third sidewall has an exhaust port for the clean gas to be discharged.
11. The dust collector according to claim 9, characterized in that, The bottom plate has multiple filter holes to allow dust on the first sidewall to fall into the third chamber through the filter holes.