Bag dust collection equipment and dust removal control method

Abstract

According to the technical scheme, the bag dust collection equipment is characterized by comprising a box body, a dust collection bag and a telescopic pipe, the box body is divided into an upper cavity and a lower cavity through a partition plate, the dust collection bag is located in the lower cavity, the upper end of the dust collection bag is sleeved with an air outlet cover, the air outlet cover is located in the upper cavity, and the telescopic pipe penetrates through the air outlet cover and the dust collection bag; the telescopic pipe is connected with the dust collection bag through a transverse rib and comprises an upper pipe section and a telescopic pipe section, the upper end of the upper pipe section is fixedly connected with the sleeve, the upper end of the telescopic pipe section is connected with the lower end of the upper pipe section, and the lower end of the telescopic pipe section is fixedly connected to the bag bottom of the dust collection bag; the telescopic pipe section comprises a plurality of thick pipe sections and thin pipe sections which are sleeved with one another, and the thick pipe sections and the thin pipe sections can be adjusted in a telescopic mode. An air inlet is formed in one side of the sleeve and connected with an inflation device, a traction rope penetrates through the telescopic pipe, and the upper end of the traction rope can be wound through a winding disc. The dust removal device has the effects of controlling the dust collection bag to shake and improving the dust removal efficiency.

Description

Technical Field

[0001] This invention relates to the field of dust control technology, and more specifically, to a bag dust collection device, and also to a dust control method using the bag dust collection device. Background Technology

[0002] Baghouse dust collectors are high-efficiency filtration devices used for industrial flue gas purification. Their core working principle is to filter and separate dust-laden gas through internally suspended dust collection bags. They are widely used in dust control and material recovery in industries such as cement, metallurgy, chemical, power, and waste incineration.

[0003] Currently, common bag dust collection equipment is prone to dust adhesion and accumulation on the surface of the dust collection bags when processing dust-laden gas. Long-term operation will lead to increased filtration resistance and even blockage. Traditional dust removal methods mostly use top-mounted blowing (such as pulse jet blowing, reverse blowing, etc.) to remove dust from the surface of the filter bags by reverse airflow impact.

[0004] However, this method has limitations in removing deeply adhered dust, and relying solely on air blowing can easily lead to localized dust accumulation that is difficult to completely remove. Therefore, a new solution is needed to address this issue. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a bag dust collection device and a dust removal control method, which has the effect of controlling the shaking of the dust collection bag and improving the dust removal efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a bag dust collection device.

[0007] The device includes a housing, several dust collection bags, and a telescopic tube. The housing is divided into an upper chamber and a lower chamber by a partition. The dust collection bags are located in the lower chamber, arranged vertically and parallel to each other. An exhaust hood is fitted onto the upper end of each dust collection bag and is located in the upper chamber. The telescopic tube passes through the exhaust hood and the dust collection bags, and is connected to the dust collection bags by horizontal ribs. The telescopic tube includes an upper section and a telescopic section. A sleeve is fixedly connected to the upper end of the upper section, and the sleeve is fixed by a support frame. The upper end of the telescopic section is connected to the upper section... The lower end of the telescopic tube section is fixedly connected to the bottom of the dust collection bag; the telescopic tube section includes several interlocking thick and thin tube sections, which can be adjusted to extend and retract; the thick and thin tube sections are connected to the dust collection bag by horizontal ribs; an air inlet is provided on one side of the sleeve, and an air inflation device is connected to the air inlet for filling the sleeve with gas; a traction rope passes through the telescopic tube, the lower end of which is connected to the bottom of the dust collection bag, and the upper end of which can be wound up by a winding reel.

[0008] By adopting the above scheme, the bottom of the telescopic tube section and the connected dust collection bag are simultaneously lifted by the winding of the traction rope, causing the dust collection bag to fold into multiple uniform sections during relative sliding. At the same time, the air inflation device injects air into the telescopic tube, which is then ejected from the air outlet on the tube wall to form a reverse cleaning airflow. The combination of mechanical folding and airflow impact not only effectively removes dust from the surface of the filter bag, but also shakes off deep-seated dust through the wave-like deformation of the filter bag.

[0009] The invention is further configured such that: an inner cavity is formed inside the sleeve, and the inner cavity is connected to an inflation device through an air inlet; a sealing part two is integrally connected to the bottom of the sleeve, and a through hole two is formed in the middle of the sealing part two; a connecting pipe is installed inside the sleeve, and a sealing device two is integrally formed at the lower end of the connecting pipe, and the sealing device two is adapted to the through hole two of the sealing part two for controlling the opening and closing of the through hole two of the sealing part two.

[0010] By adopting the above scheme, and by installing an axially movable connecting pipe and a sealing device II linked to it inside the sleeve, which cooperates with the sealing part II at the bottom of the sleeve, an independent and reliable air circuit control valve is formed. This valve can control the on / off supply of air from the inflation device to the telescopic pipe system.

[0011] The present invention is further configured such that a second spring is fitted around the outer periphery of the portion of the connecting tube located in the inner cavity of the sleeve, the second spring elastically pressing against the upper side of the second sealing device, for elastically pushing the second sealing device to seal against the second sealing portion; the upper end of the connecting tube extends through to the upper end of the sleeve, and slides to seal at the connection point through a fourth sealing ring.

[0012] By adopting the above scheme, the pre-tightening force of spring two ensures that the sealing device two always maintains a sealed fit with the sealing part two under normal conditions, thereby ensuring the normal closure of the air intake passage during non-dust cleaning stages. At the same time, the upper end of the connecting pipe adopts sliding sealing ring four to ensure that when it is subjected to spring pressure and performs axial opening and closing actions, it can still maintain a dynamic seal between the inner cavity of the sleeve and the external environment, effectively preventing dust and airflow from escaping.

[0013] The invention is further configured such that the connecting pipe has a through-hole in the middle, and the traction rope passes through the through-hole of the connecting pipe; a protrusion is fixedly installed on the outer periphery of the traction rope, the protrusion is located on the lower side of the connecting pipe and is larger than the through-hole of the connecting pipe.

[0014] By adopting the above scheme, a protrusion is fixedly installed on the traction rope and positioned below the inner hole of the connecting pipe, a mechanical linkage relationship is established between the traction rope and the connecting pipe. When the traction rope is pulled upward, the protrusion abuts against and drives the connecting pipe to rise synchronously, thereby opening the seal between the second sealer and the second sealing part; conversely, when the traction rope is lowered, the connecting pipe resets the seal under the action of the second spring.

[0015] The invention is further configured such that: an air outlet is provided at the upper end of the air vent; a sealing part is provided on the inner circumference of the air outlet; a through hole is provided on the inner circumference of the sealing part; the upper pipe section passes through the through hole; an annular gap is formed between the upper pipe section and the through hole; a sliding groove is provided on the upper pipe section; an adjusting frame is slidably installed on one part of the sliding groove; a portion of the adjusting frame extends from the sliding groove to the outer circumference of the upper pipe section; a plugging ring is integrally formed thereon; the plugging ring is mutually sealed and adapted to the through hole of the sealing part.

[0016] By adopting the above scheme, and by installing a sliding adjusting frame and an integrally formed plug ring in the upper pipe section, active mechanical seal control of the air outlet is achieved. The plug ring is adapted to the through hole of the sealing part. When the adjusting frame moves the plug ring upward, it can tightly seal the air outlet to prevent the dust removal airflow from escaping; when it moves downward, it opens the channel to ensure that the filtered gas is discharged smoothly.

[0017] The present invention is further configured such that a convex ring is fixedly connected to the outer periphery of the upper pipe section, the convex ring is located below the plug ring, and a spring is elastically pressed between the convex ring and the plug ring, the spring being able to elastically push the plug ring and the sealing part to press and seal.

[0018] By adopting the above solution, a convex ring provides mechanical restraint, and a spring provides continuous elastic preload to the sealing ring. When venting is required, external driving force overcomes the spring force and pulls down the sealing ring to open the passage. This design provides the vent with automatic reset and stable sealing functions, effectively preventing gas leakage during dust removal.

[0019] The invention is further configured such that a portion of the adjusting frame extends from the slide groove to the outer periphery of the upper pipe section, and a wire-passing hole is opened in the middle of the adjusting frame, through which the traction rope passes; a protrusion is fixedly installed on the outer periphery of the traction rope, the protrusion being located on the upper side of the adjusting frame and larger than the wire-passing hole of the adjusting frame.

[0020] By adopting the above scheme, and by setting a protrusion on the traction rope and positioning it above the wire hole of the adjusting frame, the mechanical linkage between the traction action and the opening and closing of the air outlet is achieved. When the traction rope is pulled upward to clean the ash, the adjusting frame, under the action of the spring, drives the sealing ring to reset and seal. After the ash cleaning is completed, the protrusion can abut against and drive the adjusting frame and the sealing ring to descend synchronously, thereby automatically opening the air outlet.

[0021] The present invention is further configured such that a second sliding groove is provided on the inner circumference of the end of the thick pipe section, the snap-fit ​​part of the thin pipe section is snapped into the second sliding groove, a third spring is installed in the second sliding groove, one end of the third spring abuts against the bottom of the second sliding groove, and the other end abuts against the snap-fit ​​part.

[0022] By adopting the above scheme, and by setting a sliding groove two in the thick pipe section to cooperate with the snap-fit ​​part, combined with the built-in spring three, a motion mechanism is provided for the telescopic pipe section that is clearly guided, smooth in and out, and has an automatic reset function. The pre-tightening force of spring three not only assists in buffering and storing energy during ash cleaning, but also drives each pipe section to quickly and smoothly return to its fully extended state after ash cleaning.

[0023] The present invention is further configured such that each segment of the telescopic tube section has a plurality of air outlet holes on its outer periphery.

[0024] By adopting the above scheme, multiple sets of air outlets are evenly opened along the axial direction on the pipe wall of each section of the telescopic pipe (including the thick and thin sections), achieving a three-dimensional and uniform distribution of the cleaning airflow along the entire length of the dust collection bag. This structure allows high-pressure airflow to be sprayed simultaneously from multiple points inside the filter bag, forming a comprehensive and uniform back-blowing effect on the surface of the filter bag. This not only effectively cleans the upper section of the filter bag but also removes caking dust from the middle and lower sections where dust easily accumulates, improving the uniformity of dust removal.

[0025] The present invention also provides a dust removal control method, which uses the bag dust collection equipment as described above, and includes the following steps:

[0026] Industrial dust-laden gas enters the lower chamber through an inlet pipe located at the bottom of the housing. Under the negative pressure generated by the system's main fan, the dust-laden gas passes evenly through the filter surfaces of each dust collection bag. Dust is trapped on the outer surface of the dust collection bags, while the purified gas penetrates the filter bags, enters the interior of the dust collection bags, and then flows upward, collecting in the upper chamber via the exhaust hood. The gas is then discharged through a purified exhaust pipe connected to the upper chamber. The trapped dust continuously accumulates on the surface of the dust collection bags and falls off during the cleaning process as the dust collection bags are shaken, falling into the conical dust collection hopper located at the bottom of the housing. The dust collection hopper collects and temporarily stores the dust, and periodically discharges the dust through the dust outlet at its bottom.

[0027] In summary, the present invention has the following beneficial effects:

[0028] By controlling the periodic folding and unfolding of the filter bag, and with the auxiliary reset of the built-in spring in the telescopic tube, efficient reciprocating shaking can be generated. Vibration removes the surface of the filter bag and the accumulated hardened dust. During the filter bag cleaning process, a dual cleaning effect is achieved through mechanical vibration and air blowing. Attached Figure Description

[0029] Figure 1 This is a perspective sectional view of a bag dust collection device in this embodiment;

[0030] Figure 2 This is a plan sectional view of a bag dust collection device in this embodiment;

[0031] Figure 3 forFigure 2 A magnified view of a portion of the image;

[0032] Figure 4 This is a magnified view of the inflation device in the inflated state.

[0033] Figure 5 for Figure 3 Enlarged view of point A in the middle;

[0034] Figure 6 for Figure 3 Enlarged view of point B in the middle;

[0035] Figure 7 This is a magnified view of a portion of the dust collection bag and telescopic tube;

[0036] Figure 8 for Figure 7 Enlarged view at point C

[0037] Figure 9 A plan view of the dust collection bag retracting.

[0038] Reference numerals: 1. Housing; 101. Partition; 102. Upper chamber; 103. Lower chamber; 2. Dust bag; 21. Air outlet; 211. Sealing part 1; 212. Through hole 1; 22. Air hood; 23. Bag bottom; 3. Telescopic tube; 301. Upper tube section; 302. Thick tube section; 303. Thin tube section; 31. Air outlet; 32. Protruding ring; 33. Slide groove 1; 34. Horizontal rib; 35. Slide groove 2; 36. Clamping part; 4. Traction rope; 41. Winding reel; 42. Protrusion; Adjustment Section frame 5; plug ring 51; sealing ring one 511; sealing ring two 512; vent hole 52; wire hole 53; spring one 6; sleeve 7; sealing part two 71; air inlet 72; inner cavity 73; through hole two 74; connecting pipe 8; sealing device two 81; inner hole 82; spring two 9; air filling device 10; sealing ring three 11; sealing ring four 12; spring three 13; air outlet pipe 14; slag collection hopper 15; slag outlet 16; air inlet pipe 17. Detailed Implementation

[0039] 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.

[0040] This embodiment discloses a bag dust collection device, referring to... Figures 1-8As shown, the device includes a housing 1, several parallel dust collection bags 2, and a telescopic pipe 3 passing through the center of each dust collection bag 2. The housing 1 is divided into an independent and sealed upper chamber 102 and a lower chamber 103 by a horizontally arranged partition 101. All dust collection bags 2 are vertically suspended in the lower chamber 103, arranged in regular rows and columns and kept parallel to each other to ensure uniform airflow distribution and structural compactness.

[0041] Reference Figure 3 As shown, the upper end of the dust collection bag 2 is sealed with an air hood 22. The air hood 22 passes through the partition 101 and is fixedly installed. Its lower part is located in the lower chamber 103 and is connected to the upper end of the dust collection bag 2. Its upper part is located in the upper chamber 102. The upper end of the air hood 22 is provided with an air outlet 21 that communicates with its cavity.

[0042] Reference Figure 7 As shown, the telescopic tube 3 coaxially passes through the exhaust hood 22 and the dust collection bag 2, and extends along the axial direction of the dust collection bag 2. Between the outer wall of the telescopic tube 3 and the inner wall of the dust collection bag 2, multiple transverse ribs 34 are evenly connected circumferentially. The two ends of the ribs 34 are fixedly connected to the outer wall of the telescopic tube 3 and the inner wall of the dust collection bag 2, respectively, to maintain the unfolded shape of the dust collection bag 2 and ensure its relative position with the telescopic tube 3 is stable.

[0043] Each section of the telescopic pipe 300 has several air outlets 31 on its outer periphery, which can evenly guide airflow into the dust collection bag 2 for slag removal. The structure of the telescopic pipe 3 from top to bottom includes an upper pipe section 301 and a telescopic pipe section 300. The upper end of the telescopic pipe section 300 is connected to the lower end of the upper pipe section 301, and the lower end of the telescopic pipe section 300 is fixedly connected to the bottom 23 of the dust collection bag 2. The telescopic pipe section 300 includes several interlocking thick pipe sections 302 and thin pipe sections 303, which are arranged alternately along the axial direction and are telescopically interlocked. Specifically, the thick pipe section 302 and the thin pipe section 303 are connected to the dust collection bag 2 by transverse ribs 34. The inner peripheral wall of the end of the thick pipe section 302 is provided with a longitudinal sliding groove 35. The outer side of the upper end of the thin pipe section 303 is formed with a radially protruding snap-fit ​​part 36. The snap-fit ​​part 36 snaps into the sliding groove 35 and can slide in the sliding groove 35, thereby realizing the expansion and contraction of the pipe section and preventing relative rotation.

[0044] Reference Figure 8 As shown, a spring 3 13 is installed inside the slide groove 2 35. One end of the spring 3 13 abuts against the bottom of the slide groove 2 35, and the other end abuts against the snap-fit ​​part 36. Under normal conditions, the spring 3 13 provides elastic force to extend the thin tube section 303 outward relative to the thick tube section 302, thereby assisting the telescopic tube 3 and the dust collection bag 2 to quickly and automatically return to the fully extended working state after the dust removal is completed.

[0045] Reference Figure 3 , Figure 6As shown, a winding reel 41 is fixedly installed above the sleeve 7. A traction rope 4 passes through the telescopic tube 3. The lower end of the traction rope 4 is connected to the center of the bottom 23 of the dust collection bag 2, and the upper end of the traction rope 4 extends upward and is wound up by the winding reel 41. By retracting and extending the traction rope 4 through the drive device, the lifting and lowering of the bottom of the dust collection bag 2 can be controlled, thereby realizing the folding and unfolding of the dust collection bag 2.

[0046] Reference Figure 3 , Figure 9 As shown, when the dust collection bag 2 enters the cleaning process, the external drive device pulls the bottom 23 of the dust collection bag 2 upwards via the traction rope 4. During this process, the dust collection bag 2 undergoes multiple segments of uniform folding deformation along its axial direction under the action of tension. This controlled folding is not a simple overall contraction, but rather the dust collection bag 2 forms a multi-segment uniform folding shape through the relative sliding between the alternating thick tube segments 302 and thin tube segments 303 of the telescopic tube 3 and the synergistic action of the built-in spring 313.

[0047] The uniform folding allows each part of the dust collection bag 2 to generate high-frequency, small-amplitude mechanical shaking and deformation, effectively loosening and peeling off the dust adhering to its inner and outer surfaces, especially deeply compacted dust clumps. Under the action of gravity, the shaken dust slides down evenly and smoothly along the inclined surface formed when the dust collection bag 2 is folded and the airflow organization inside the box, and finally all collects and falls into the slag collection hopper 15 at the bottom, avoiding local dust accumulation or secondary dust re-entrainment, ensuring thorough dust removal and high efficiency of dust collection.

[0048] Reference Figure 3 , Figure 5 As shown, the upper end of the upper pipe section 301 is fixedly connected to the sleeve 7, which is fixed by a support frame. The sleeve 7 has an inner cavity 73, which is connected to the air inlet 72 through the air inlet 72. The device can continuously or pulsally supply purified gas or dust removal airflow into the sleeve 7.

[0049] A connecting pipe 8, which can move axially, is coaxially installed inside the sleeve 7. The lower end of the connecting pipe 8 extends into the interior of the sleeve 7 and is integrally formed with a sealing device 81 with an enlarged radial dimension. Correspondingly, an inwardly protruding annular sealing part 71 is provided at the bottom of the sleeve 7. A through hole 74 is opened in the middle of the sealing part 71, and the sealing device 81 is adapted to the through hole 74 of the sealing part 71. When the connecting pipe 8 moves downward in a controlled manner, the lower surface of the sealing device 81 can fit tightly with the upper surface of the sealing part 71, thereby cutting off the passage for airflow to enter the telescopic pipe 3 downward. To enhance the sealing effect, a sealing groove is opened on the outer peripheral wall of the sealing device 81, and a sealing ring 11 is embedded in the groove. When the sealing device 81 moves down to the closed position, the sealing ring 11 forms an interference fit radial seal with the inner wall of the sleeve 7, effectively preventing gas leakage. This structure constitutes an independent and reliable second air circuit control valve, which can control the air intake and shut-off of the through hole 74 of the sealing part 71.

[0050] A spring 9 is coaxially fitted on the outer wall of the pipe section of the connecting pipe 8 located in the inner cavity 73 of the sleeve 7. The upper end of the spring 9 abuts against the top of the inner cavity of the sleeve 7, and the lower end abuts against the upper surface of the sealing device 81. The spring 9 is a compression spring, which can elastically push the sealing device 81 and the sealing part 71 to seal against each other under normal conditions. The upper end of the connecting pipe 8 extends to the upper end of the sleeve 7, and slides to seal at the connection point through the sealing ring 12.

[0051] Furthermore, the connecting pipe 8 extends upward and passes through the top of the sleeve 7, with a dynamic seal between the outer wall of this protruding portion and the opening at the top of the sleeve 7. In this mating area, at least two annular grooves are spaced axially on the outer wall of the connecting pipe 8, each groove containing a sealing ring 12. These sealing rings 12 fit tightly against the inner wall of the opening at the top of the sleeve 7, forming a multi-stage axial dynamic seal, effectively preventing gas in the inner cavity 73 of the sleeve 7 from leaking upward along the gap between the connecting pipe 8 and the sleeve 7, while allowing the connecting pipe 8 to perform necessary axial movement in a sealed state.

[0052] The connecting pipe 8 has an inner hole 82 that runs vertically through the middle, and the traction rope 4 passes through the inner hole 82 of the connecting pipe 8. A protrusion 42 is fixedly installed on the outer periphery of the traction rope 4. The protrusion 42 is located on the lower side of the connecting pipe 8 and is larger than the inner hole 82 of the connecting pipe 8.

[0053] A protrusion 42 is fitted around the outer periphery of the traction rope 4. The protrusion 42 is located inside the telescopic tube 3 and within the axial space below the sealing part 71 and above the blocking ring 5. The outer diameter of the protrusion 42 is designed to be smaller than the inner diameter of the telescopic tube 3 but larger than the diameter of the traction rope 4, allowing it to move freely up and down with the traction rope 4. When the traction rope 4 is pulled upward, the upper end face of the protrusion 42 can abut against and push upward against the structure of the sealing device 81, assisting in opening or keeping it open; when the traction rope 4 is released downward, the sealing device 81 closes again due to the downward elastic force applied by the spring 9.

[0054] During the dust removal process, the air filling device 10 introduces high-pressure gas into the telescopic tube 3, and the airflow is ejected at high speed from the air outlet 31 to achieve dust removal. If the air outlet 21 is open at this time, some of the high-pressure airflow will escape upward along the gap between the telescopic tube 3 and the air outlet hood 22 and be discharged directly from the air outlet 21. This will not only significantly reduce the pressure and speed of the dust removal airflow acting on the dust collection bag, affecting the dust removal effect, but also cause waste of compressed air and energy loss, and may interfere with the normal airflow organization of the upper chamber 102.

[0055] Therefore, during the dust removal stage, the air outlet 21 is sealed by a sealing structure to improve the air blowing effect.

[0056] An annular sealing section 211 extends from the inner circumference of the air outlet 21 towards the center. A through hole 212 is provided on the inner circumference of the sealing section 211, through which the upper section 301 of the telescopic tube 3 can slide axially. An annular gap is formed between the upper section 301 and the through hole 212. A longitudinal groove 33 is provided axially on the outer wall of the upper section 301, and an adjusting frame 5 is slidably mounted at the groove 33. Part of the adjusting frame 5 extends from the groove 33 to the outer circumference of the upper section 301, and the adjusting frame 5 can only move axially. By controlling the raising and lowering of the adjusting frame 5, its lower end face can be pressed against or disengaged from the sealing section 211, thereby opening and closing the air outlet 21 to regulate whether gas is discharged from the air outlet hood 22.

[0057] Reference Figure 6As shown, the adjusting frame 5 is integrally formed with a plugging ring 51, which is mutually sealingly fitted with the through hole 212 of the sealing part 211. A circular sealing ring 511 is fitted onto the outer peripheral wall of the plugging ring 51. The outer periphery of the plugging ring 51 matches the shape of the inner wall of the through hole 212. When the adjusting frame 5 rises to the working position, the plugging ring 51 can extend into the through hole 212. At this time, the sealing ring 511 and the inner wall of the through hole 212 form an interference fit, achieving radial sealing. On the lower side of the adjusting frame 5, a radially protruding convex ring 32 is fixedly connected to the outer wall of the upper pipe section 301. The convex ring 32 is located on the outer periphery of the upper pipe section 301. A spring 6 is coaxially fitted between the adjusting frame 5 and the convex ring 32. The upper end of the spring 6 abuts against the adjusting frame 5, and the lower end abuts against the upper surface of the convex ring 32, which can elastically push the plugging ring 51 against the sealing part 211 for sealing. Under normal conditions, the adjusting frame 5 is kept in the open position, i.e., the air outlet 21 is open, due to the gravity of the traction rope 4 and the bottom of the bag 23; when the adjusting frame 5 is subjected to the upward elastic force of the spring 6, the adjusting frame 5 is in the closed position. The convex ring 32 also serves as a mechanical limiting structure for the downward movement of the adjusting frame 5.

[0058] Furthermore, an annular sealing groove is formed on the inner circumferential wall of the plugging ring 51, and a second sealing ring 512 is embedded in the groove. The second sealing ring 512 is made of a high-temperature resistant and wear-resistant elastic material, and its inner diameter is slightly smaller than the outer diameter of the upper pipe section 301. When the plugging ring 51 rises to the working position, the second sealing ring 512 forms a tight radial seal with the outer wall of the upper pipe section 301. In this way, the first sealing ring 511 and the second sealing ring 512 together constitute a bidirectional sealing structure, respectively sealing the two potential leakage paths between the plugging ring 51 and the inner wall of the through hole 212, and between the plugging ring 51 and the outer wall of the upper pipe section 301, thereby improving the overall sealing reliability and tightness of the regulating frame 5 in the closed state.

[0059] Furthermore, the center of the regulating frame 5 has several through-holes 52 along its axial direction, ensuring that an annular gas flow channel is always maintained between the inner wall of the regulating frame 5 and the outer wall of the upper pipe section 301. This design ensures that regardless of whether the regulating frame 5 is in the open, closed, or intermediate position, the airflow rising from inside the telescopic pipe 3 can flow continuously and smoothly upward through this annular channel without being blocked by the lifting and lowering movement of the regulating frame 5. This achieves the separation and coordination of the control function for opening and closing the air outlet 21 and the function of maintaining the unobstructed flow of the main airflow channel.

[0060] Part of the adjusting frame 5 extends from the slide groove 33 to the outer periphery of the upper pipe section 301, and a wire hole 53 is opened in the middle of the adjusting frame 5. The traction rope 4 passes through the wire hole 53 of the adjusting frame 5. A protrusion 42 is fixedly installed on the outer periphery of the traction rope 4. The protrusion 42 is located on the upper side of the adjusting frame 5 and is larger than the wire hole 53 of the adjusting frame 5.

[0061] When the traction rope 4 is released downwards, the lower end face of the protrusion 42 can press down against and adjust the bracket 5, driving it to move downwards and close the air intake passage. This protrusion 42 achieves mechanical linkage control of the two sealers through a single traction action. In the filtration operation state, the dust collection bag 2 remains naturally unfolded under its own weight and internal airflow support, and the bottom 23 of the bag applies a downward pulling force to the protrusion 42 via the traction rope 4. This pulling force keeps the protrusion 42 stably in the lower position of its stroke. In this position, the lower end face of the protrusion 42 contacts the adjusting bracket 5, thereby causing the sealing ring 51 to descend and disengage from the sealing part 211, allowing the air outlet 21 to be in a freely open state. In this way, the filtered clean gas can smoothly enter the upper chamber 102 through the air outlet 21 and be discharged.

[0062] Reference Figure 3 As shown, during the dust collection bag 2, through the periodic lifting and releasing of its bottom, combined with the elastic response of the internal support structure, a controllable, multi-section axial folding and rebound unfolding motion is generated.

[0063] The drive unit pulls the traction rope 4 via the take-up reel 41, which in turn drives the protrusion 42 to move upward. During this process, the adjusting frame 5 automatically resets via the spring 6 to block the air outlet 21. Simultaneously, the protrusion 42 lifts the sealing device 81, opening the air inlet channel inside the sleeve 7. Subsequently, the inflation device 10 pneumatically injects high-pressure gas into the air inlet 72. The gas enters the inner cavity 73 through the air inlet 72 and flows downward into the telescopic tube 3, then exits at high speed from the air outlet 31 of the telescopic tube 3, impacting the inner surface of the dust collection bag 2.

[0064] Simultaneously, the continuous lifting action causes the traction rope 4 to exert an upward pulling force on the bottom 23 of the dust collection bag 2, while the impact of the high-pressure airflow generates an outward expansion force on the dust collection bag 2. Under the combined action of these two forces, the various thick and thin sections of the telescopic tube 3 overcome the resistance of the spring 33 and undergo relative telescopic movement. This, in turn, drives the dust collection bag 2 to generate high-frequency, small-amplitude mechanical vibration through the transverse rib 34 connecting the two, effectively stripping the dust adhering to the surface of the dust collection bag 2, especially the deeply compacted dust and slag, causing it to fall off and fall into the slag collection hopper 15 at the bottom of the lower chamber 103, thereby achieving efficient dust removal.

[0065] This embodiment also discloses a dust removal control method for a device, including the following steps:

[0066] S1: Industrial dust-laden gas is sent into the lower chamber 103 through the air inlet pipe 17 located at the bottom of the housing 1, so that a certain amount of rotational pre-settling is formed in the initial stage of entry, and the coarse dust particles are partially separated under the action of inertia.

[0067] S2: Under the continuous negative pressure generated at the outlet of the purified air duct 14 by the main fan of the system, a negative pressure is generated in the upper chamber 102, and the dust-laden gas diffuses and penetrates the filter surfaces of all vertically arranged dust collection bags 2.

[0068] S3: Fine dust is efficiently intercepted and adsorbed on the outer surface of the dust collection bag 2, gradually forming a dust layer; while the purified clean gas penetrates the filter material and enters the internal cavity of the dust collection bag 2, and flows upward.

[0069] S4: Clean gas is collected in the exhaust hood 22 at the top of each dust collection bag 2, and then uniformly introduced into the upper chamber 102. Finally, it is discharged from the system through the purified exhaust pipe 14 connected to the top of the upper chamber 102, which can meet the environmental protection emission requirements.

[0070] S5: The trapped dust continuously accumulates on the outer surface of the filter bag, causing the filtration resistance to rise. When the set pressure difference or time period is reached, the system automatically switches to the dust removal program. During dust removal, the filter bag vibrates mechanically through a combination of traction and airflow, causing the adhering dust layer to peel off in sheets by air blowing. Under gravity, the dust falls into the conical slag collection hopper 15 at the bottom of the housing. The collected dust is discharged periodically through the slag outlet 16 at the bottom according to a set program, entering the downstream pneumatic ash conveying system or storage silo, thus realizing the entire process of continuous gas purification and dust resource recovery.

[0071] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A bag dust collection device, characterized in that, It includes a housing (1), several dust collection bags (2) and a telescopic tube (3). The housing (1) is divided into an upper chamber (102) and a lower chamber (103) by a partition (101). The dust collection bags (2) are located in the lower chamber (103). Each dust collection bag (2) is arranged vertically and is parallel to each other. The dust collection bag (2) is fitted with an exhaust hood (22) at the upper end. The exhaust hood (22) is located in the upper chamber (102). The telescopic tube (3) passes through the exhaust hood (22) and the dust collection bag (2). The telescopic tube (3) is connected to the dust collection bag (2) by a horizontal rib (34). The telescopic tube (3) includes an upper tube section (301) and a telescopic tube section (300). The upper end of the upper tube section (301) is fixedly connected to a sleeve (7). The sleeve (7) is fixed by a support frame. The upper end of the telescopic pipe section (300) is connected to the lower end of the upper pipe section (301), and the lower end of the telescopic pipe section (300) is fixedly connected to the bottom (23) of the dust collection bag (2). The telescopic pipe section (300) includes several interlocking thick pipe sections (302) and thin pipe sections (303), which can be mutually extended and retracted. The thick pipe section (302) and the thin pipe section (303) are respectively connected to the dust collection bag (2) by the horizontal rib 34. An air inlet (72) is provided on one side of the sleeve (7). An air inlet (72) is connected to an air inflation device (10). The air inflation device (10) is used to fill the sleeve (7) with gas. A traction rope (4) runs through the telescopic tube (3). The lower end of the traction rope (4) is connected to the bottom (23) of the dust collection bag (2). The upper end of the traction rope (4) can be wound up by a winding reel (41).

2. The bag dust collection device according to claim 1, characterized in that, The sleeve (7) has an inner cavity (73) inside, and the inner cavity (73) is connected to the inflation device (10) through the air inlet (72); the bottom of the sleeve (7) is integrally connected to the sealing part two (71), and the sealing part two (71) has a through hole two (74) in the middle; the sleeve (7) is installed with a connecting pipe (8), and the lower end of the connecting pipe (8) is integrally formed with a sealing device two (81), which is adapted to the through hole two (74) of the sealing part two (71) and is used to control the opening and closing of the through hole two (74) of the sealing part two (71).

3. The bag dust collection device according to claim 2, characterized in that, The outer periphery of the part of the connecting tube (8) located in the inner cavity (73) of the sleeve (7) is fitted with a spring two (9). The spring two (9) elastically presses against the upper side of the sealing device two (81) to elastically push the sealing device two (81) and the sealing part two (71) to seal against each other. The upper end of the connecting tube (8) extends through to the upper end of the sleeve (7) and slides to seal at the connection point through the sealing ring four (12).

4. The bag dust collection device according to claim 1, characterized in that, The connecting pipe (8) has an inner hole (82) that runs vertically through the middle, and the traction rope (4) passes through the inner hole (82) of the connecting pipe (8); a protrusion (42) is fixedly installed on the outer periphery of the traction rope (4), and the protrusion (42) is located on the lower side of the connecting pipe (8) and is larger than the inner hole (82) of the connecting pipe (8).

5. A bag dust collection device according to claim 1, characterized in that, The upper end of the vent hood (22) is provided with an vent (21). The vent (21) is provided with a sealing part (211) on the inner circumference of the vent (21). The sealing part (211) is provided with a through hole (212) on the inner circumference of the sealing part (211). The upper pipe section (301) passes through the through hole (212). An annular gap is formed between the upper pipe section (301) and the through hole (212). The upper pipe section (301) is provided with a sliding groove (33). An adjusting frame (5) is slidably installed on the sliding groove (33). Part of the adjusting frame (5) extends from the sliding groove (33) to the outer circumference of the upper pipe section (301). A plugging ring (51) is integrally formed. The plugging ring (51) and the through hole (212) of the sealing part (211) are mutually sealed and adapted.

6. A bag dust collection device according to claim 5, characterized in that, A convex ring (32) is fixedly connected to the outer periphery of the upper pipe section (301). The convex ring (32) is located on the lower side of the plug ring (51). A spring (6) is elastically pressed between the convex ring (32) and the plug ring (51). The spring (6) can elastically push the plug ring (51) and the sealing part (211) to press and seal.

7. A bag dust collection device according to claim 6, characterized in that, Part of the adjusting frame (5) extends from the slide groove (33) to the outer periphery of the upper pipe section (301), and a wire hole (53) is opened in the middle of the adjusting frame (5). The traction rope (4) passes through the wire hole (53) of the adjusting frame (5). A protrusion (42) is fixedly installed on the outer periphery of the traction rope (4). The protrusion (42) is located on the upper side of the adjusting frame (5) and is larger than the wire hole (53) of the adjusting frame (5).

8. A bag dust collection device according to claim 1, characterized in that, The inner circumference of the end of the thick pipe section (302) is provided with a sliding groove two (35), and the snap-fit ​​part (36) of the thin pipe section (303) is snapped into the sliding groove two (35). A spring three (13) is installed in the sliding groove two (35). One end of the spring three (13) abuts against the bottom of the sliding groove two (35), and the other end abuts against the snap-fit ​​part (36).

9. A bag dust collection device according to claim 1, characterized in that, Each section of the telescopic pipe segment (300) has several air outlets (31) on its outer periphery.

10. A dust control method, characterized in that, The dust removal control method of the equipment described in any one of claims 1 to 9 is adopted. Includes the following steps: S1: Industrial dust-laden gas enters the lower chamber (103) through the air inlet pipe (17) located at the bottom of the box (1); S2: Under the negative pressure generated by the main fan of the system, a negative pressure is generated in the upper chamber (102), and the dust-laden gas passes through the filter surface of each dust collection bag (2); S3: Dust is trapped on the outer surface of the dust collection bag (2), while the purified gas penetrates the filter bag and enters the interior of the dust collection bag (2), then flows upward and is collected in the upper chamber (102) via the exhaust hood (22). S4: The gas is discharged through the purification outlet pipe (14) connected to the upper chamber (102); S5: The trapped dust accumulates on the surface of the dust collection bag (2) and falls into the conical slag collection hopper (15) at the bottom of the box (1) during the dust removal process, through mechanical vibration and air blowing of the dust collection bag (2).

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