Bag filter for sintering waste gas treatment and fracturing proppant ceramic sand preparation process

Abstract

This invention relates to the technical field of dust collectors, and discloses a bag filter dust collector for sintering waste gas treatment and a process for preparing fracturing proppant ceramsite sand. The bag filter dust collector for sintering waste gas treatment includes a dust filter chamber, a dust collection chamber below the dust filter chamber, and a dust filter unit. The dust filter unit includes a pair of parallel and vertically arranged support plates, a horizontal plate below the support plate, and multiple dust filter components arranged horizontally on the support plates. Each dust filter component includes a polygonal prism-shaped filter cartridge, with a support inside the cartridge containing multiple parallel support ribs. During dust filtration, the filter cartridge and support are in a torsional posture. This device significantly improves the dust collection capacity per unit volume by increasing the surface area and pleat density of the filter material, resulting in a higher filtration efficiency than traditional cylindrical filter cartridges. The pulsed airflow excites the reciprocating torsional vibration of the filter cartridge, which, combined with the energy storage effect of the inertial disk and conical spring, increases the dust shedding rate.

Description

Technical Field

[0001] This invention relates to the technical field of dust collectors, and more particularly to a bag filter dust collector for sintering waste gas treatment and a process for preparing ceramsite sand as a fracturing proppant. Background Technology

[0002] Baghouse dust collectors are highly efficient industrial dust removal devices that separate particulate matter from dust-laden gas using filter bags (or filter cartridges). After the dust-laden gas enters the dust collector, the dust is trapped on the outside of the filter bags, while clean gas passes through and exits. When the filter bags accumulate dust to a certain level, they are cleaned using pulse-jet cleaning or other methods, causing the dust to fall into the dust collection device. They are widely used for waste gas purification in metallurgy, chemical industry, and other fields.

[0003] Patent publication number CN104785027A discloses a baghouse dust collector, including a dust collector housing. The dust collector housing has an air outlet on one side of its upper end and an air inlet on one side of its lower end. The dust collector housing contains a dust collection cavity. The lower half of the dust collection cavity has a dust hopper, and the upper half of the dust collection cavity has a dust collection bag. The dust hopper is open at both ends. Inside the dust hopper are a deposition chamber with a smaller upper section and a larger lower section, an expansion chamber with a larger upper section and a smaller lower section, and a discharge chamber with a larger upper section and a smaller lower section. The deposition chamber is located at the lower end of the expansion chamber, and the discharge chamber is located at the lower end of the deposition chamber. The middle part of the deposition chamber communicates with the air inlet.

[0004] The existing technology has the following drawbacks:

[0005] In existing technologies, traditional baghouse dust collectors typically use cylindrical filter cartridges with limited filtration area and insufficient stability of the filter media shape, making them prone to deformation due to wind pressure, leading to decreased filtration efficiency. Cleaning relies on a single pulse airflow impact, resulting in small filter cartridge vibration amplitude and short duration, leading to incomplete dust removal, especially at the bottom and corners of the cartridge, where dust easily accumulates, causing a surge in filtration resistance after long-term operation. Furthermore, the cleaning system has poor compatibility with the filter cartridge structure, resulting in uneven airflow distribution. Excessive impact in some areas causes filter media wear, while other areas experience ineffective cleaning, requiring frequent cartridge replacements and incurring high maintenance costs. Simultaneously, the lack of effective energy recovery and buffering mechanisms results in low energy utilization of the pulse airflow, leading to high energy consumption and shortened equipment lifespan due to severe impact, making it difficult to meet the long-term stable treatment requirements of high-concentration, highly corrosive conditions such as sintering exhaust gases. Summary of the Invention

[0006] In view of the above-mentioned problems in the existing technology, a bag filter dust collector for sintering waste gas treatment and a process for preparing ceramsite sand for fracturing proppant are proposed.

[0007] One aspect of this application provides a baghouse dust collector for sintering exhaust gas treatment, the purpose of which is to improve the dust removal efficiency of the baghouse dust collector and extend the service life of the filter bags.

[0008] The technical solution of the present invention is: a bag filter for treating sintering exhaust gas, including a dust filter chamber, a dust collection chamber below the dust filter chamber, and a dust filter unit disposed in the dust filter chamber;

[0009] The pulse unit, located inside the dust filter chamber, is used to pulse high-pressure gas to the dust filter unit;

[0010] The dust filtration unit includes a pair of parallel and vertically arranged support plates 1 and 2. A horizontal plate is arranged below the support plate 1. Multiple dust filtration components are horizontally arranged on the support plates 1 and 2, and each dust filtration component penetrates the support plates 1 and 2. The dust filtration component includes a polygonal filter cartridge. The opening of the filter cartridge is located on one side of the support plate 1. A cylinder support is arranged inside the filter cartridge. The cylinder support includes multiple parallel support ribs. The number of support ribs corresponds to the corners of the filter cartridge, and the support ribs abut against the corners inside the filter cartridge.

[0011] During dust filtration, the filter cartridge and the support are in a twisted position.

[0012] Furthermore, a support ring one is provided at the opening of the filter cartridge, and a support ring two is provided at the opening of the support rib, with the support ring one engaging inside the support ring two.

[0013] Furthermore, the dust filter assembly also includes a cylinder disposed at the bottom of the filter cartridge and disposed on the support plate 2. An inertia disk is disposed inside the cylinder, and conical springs are symmetrically connected to both sides of the inertia disk. One side of the conical spring is connected to the bottom of the cylinder support, and the other side of the conical spring is connected to the bottom of the cylinder. The conical springs in symmetrical positions have opposite torsional directions.

[0014] Furthermore, a crossbar is provided on one side of the cone bottom of the conical spring, and a buckle is connected to the crossbar. The two buckles are respectively connected to the bottom of the cylinder support and the bottom of the inner cylinder.

[0015] Furthermore, the cylindrical support is provided with multiple sets of polygonal rings, and multiple sets of blades are provided on the polygonal rings, with the blades tilting in the opposite direction to the torsion direction of the cylindrical support.

[0016] Furthermore, the dust filter chamber is provided with an air outlet pipe that is connected to a front chamber of the support plate, the dust collection chamber is provided with an air inlet pipe that is connected to a rear chamber of the support plate, and the bottom of the dust collection chamber is provided with an ash outlet.

[0017] Furthermore, a monitoring door is provided on the dust filter chamber located on the front side of the support plate.

[0018] Furthermore, the pulse unit includes an air storage tank located outside the dust filter chamber. Multiple electronic pulse valves are connected to the air storage tank. Each electronic pulse valve is connected to a pressure pipe, and multiple branch pipes are connected to the pressure pipe. Each branch pipe is located at the opening of a filter cartridge.

[0019] Furthermore, a sealing ring is provided on the outside of the filter cartridge, and the sealing ring is rotatably engaged within the second support plate.

[0020] Another aspect of the present invention provides a process for preparing fracturing proppant ceramsite sand, which employs a bag filter for sintering waste gas treatment, and includes the following steps:

[0021] Step 1: Select bauxite and clay raw materials, crush and screen them to remove impurities, and feed them into a mixing device in proportion to stir evenly;

[0022] Step 2: Feed the mixed raw materials into a pellet mill, add water to form pellets, and perform preliminary screening on the pellets;

[0023] Step 3: Send the qualified pellets into the drying equipment and remove moisture by hot air.

[0024] Step 4: The dried spherical blanks are fed into the sintering kiln and sintered at high temperature;

[0025] Step 5: The waste gas generated during sintering is introduced into a bag filter for sintering waste gas treatment. After being filtered by the filter cartridges, the purified gas is discharged by the induced draft fan.

[0026] Step Six: The sintered ceramsite sand is cooled to room temperature in a cooling device, then graded and screened by a screening device, and finally packaged and stored.

[0027] The beneficial effects of this invention are:

[0028] 1. By increasing the surface area and pleat density of the filter material, the dust collection capacity per unit volume is significantly improved, and the filtration efficiency is higher than that of traditional cylindrical filter cartridges; the pulse airflow excites the reciprocating torsional vibration of the filter cartridge, combined with the energy storage effect of the inertial disk and the conical spring, which improves the dust removal rate and reduces the cleaning energy consumption.

[0029] 2. The polygonal support ring, mounting holes and multi-faceted ring form a three-dimensional constraint structure, which effectively resists the impact of pulsed airflow, reduces the deformation of the filter cartridge and extends its service life; the bidirectional torsional elasticity of the conical spring and the rotational damping effect of the multi-faceted ring disperse vibration stress, reduce filter material fatigue damage and extend equipment maintenance cycle. Attached Figure Description

[0030] Figure 1 This is a perspective view of the bag filter for treating sintering exhaust gas according to the present invention;

[0031] Figure 2 For the present invention Figure 1 Another perspective;

[0032] Figure 3 For the present invention Figure 2 Internal structure diagram of the dust filter chamber;

[0033] Figure 4This is a perspective view of the dust filter unit in the bag filter for sintering exhaust gas treatment of the present invention;

[0034] Figure 5 This is a partial cut-off view of the dust filter unit in the baghouse dust collector for sintering exhaust gas treatment of the present invention.

[0035] Figure 6 For the present invention Figure 5 Sectional view at point AA;

[0036] Figure 7 This is a perspective view of the dust filter assembly in the bag filter for sintering exhaust gas treatment of the present invention;

[0037] Figure 8 For the present invention Figure 7 A 3D view behind the hidden filter cartridge;

[0038] Figure 9 This is a perspective view of the multi-faceted ring and blades in the bag filter for sintering exhaust gas treatment of the present invention;

[0039] Figure 10 This is a perspective view of the inertial disk and conical spring in the bag filter for sintering waste gas treatment of the present invention.

[0040] In the picture:

[0041] 1. Dust filtration chamber; 2. Dust collection chamber; 3. Support plate one; 4. Support plate two; 5. Horizontal plate; 6. Dust filtration assembly; 7. Filter cartridge; 8. Cylinder support; 9. Support ring one; 10. Support ring two; 11. Cylinder; 12. Inertia disk; 13. Conical spring; 14. Crossbar; 15. Buckle; 16. Multi-faceted ring; 17. Blade; 18. Air outlet pipe; 19. Air inlet pipe; 20. Ash outlet; 21. Monitoring door; 22. Air storage tank; 23. Electronic pulse valve; 24. Pressure pipe; 25. Branch pipe; 26. Sealing ring. Detailed Implementation

[0042] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] Example 1, referring to Figure 1-10 The first embodiment of the present invention provides a bag filter for treating sintering exhaust gas, as detailed in the following reference. Figures 1-5 It includes a dust filter chamber 1, and a dust collection chamber 2 is provided below the dust filter chamber 1. It also includes...

[0044] A dust filtration unit is installed inside dust filtration chamber 1;

[0045] A pulse unit, installed inside the dust filter chamber 1, is used to pulse high-pressure gas to the dust filter unit;

[0046] The dust filtration unit includes a pair of parallel and vertically arranged support plates 3 and 4. A horizontal plate 5 is arranged below the support plate 3. Multiple dust filtration components 6 are arranged horizontally on the support plates 3 and 4, and each dust filtration component 6 passes through the support plates 3 and 4. The dust filtration component 6 includes a polygonal filter cartridge 7. The opening of the filter cartridge 7 is located on one side of the support plate 3. A cylinder support 8 is arranged inside the filter cartridge 7. The cylinder support 8 includes multiple parallel support ribs. The number of support ribs corresponds to the corners of the filter cartridge 7, and the support ribs abut against the inner corners of the filter cartridge 7. During dust filtration, the filter cartridge 7 and the cylinder support 8 are in a torsional posture.

[0047] Specifically, the overall design adopts a modular assembly structure, which facilitates on-site installation and subsequent maintenance. Its core consists of a dust filter chamber 1 and a dust collection chamber 2, which form a vertically distributed main frame. The dust filter chamber 1 serves as the core area for flue gas filtration, integrating a dust filter unit and a pulse unit. The dust collection chamber 2 is located below the dust filter chamber 1 and is used to collect the filtered and separated dust. The two are connected by a specific structure to allow the dust to fall and collect naturally.

[0048] The dust filter chamber 1 is primarily supported by a pair of parallel and vertically arranged support plates 3 and 4. A horizontal plate 5 extends below support plate 3, which, together with support plate 3 and the inner wall of dust filter chamber 1, encloses a separate discharge chamber on one side of the bottom of dust filter chamber 1. The remaining space within dust filter chamber 1 serves as the filtration chamber. Dust-laden flue gas first enters the filtration chamber and, under pressure difference, passes through filter cartridge 7, causing dust particles to be intercepted and adhere to the outside of filter cartridge 7. The purified gas then enters the discharge chamber through the opening of filter cartridge 7 and is finally discharged through the outlet of the discharge chamber. Pressure sensors are installed in both the discharge chamber and the filtration chamber. When the pressure difference reaches a preset value, the pulse unit activates.

[0049] Several dust filter components 6 are arranged in a horizontal array on support plate 3 and support plate 4. Each dust filter component 6 horizontally penetrates both support plates, ensuring that both ends of the filter cartridge 7 are effectively connected to the filtration chamber and the discharge chamber, respectively. The core of the dust filter component 6 is a polygonal prism-shaped filter cartridge 7. Compared with the traditional cylindrical filter cartridge 7, its polygonal side design can form a larger effective dust filtration area in the same installation space, thereby increasing the amount of flue gas processed per unit volume. The open end of the filter cartridge 7 is sealed to the side of support plate 3 facing the discharge chamber, ensuring that the purified gas can completely enter the discharge chamber without leakage.

[0050] The filter cartridge 7 has an internal support 8, which consists of multiple parallel support ribs. The number of support ribs corresponds one-to-one with the number of corners of the filter cartridge 7, and the outer side of each support rib is tightly abutted against the inner corner of the filter cartridge 7. This design not only provides uniform support for the filter cartridge 7, preventing deformation or collapse under long-term wind pressure, but also reduces the obstruction of the airflow channels inside the filter cartridge 7 by the support structure. It is worth noting that in the dust filtration working state, the filter cartridge 7 and the support 8 are in a twisted posture. This twist makes the filter cartridge 7 more compact in axial length and forms a richer pleated shape in radial direction. The fine gaps between the pleats further increase the contact opportunity between the dust and the filter material, significantly improving the collection efficiency of fine particles.

[0051] The pulse unit is installed inside the dust filter chamber 1 on one side near the support plate 3, and works in conjunction with the discharge chamber to periodically clean the dust filter assembly 6.

[0052] The inner wall of the dust collection chamber 2 is designed with an incline, which facilitates the dust shaken off from the filter cartridge 7 to collect at the bottom under the action of gravity. The bottom of the dust collection chamber 2 is equipped with a dust discharge device, which can periodically or continuously discharge the collected dust while ensuring the airtightness of the dust collection chamber 2, so as to avoid the accumulation of dust in the dust collection chamber 2 and the generation of secondary dust.

[0053] Reference Figure 5 The filter cartridge 7 has a support ring 9 at the opening and a support ring 10 at the opening of the support rib. The support ring 9 is engaged with the support ring 10.

[0054] Specifically, support ring 9 adopts a shape that matches the polygonal contour of filter cartridge 7. Its inner wall fits tightly against the outer side of the open end of filter cartridge 7, forming an integrated structure with filter cartridge 7 through welding or molding processes, ensuring uniform force distribution during pulse cleaning. Support ring 10 is fixedly installed at the open end of the support rib, and its outer contour is also polygonal, forming a precise engagement with the inner wall of support ring 9. When filter cartridge 7 is assembled with support 8, support ring 9 fits perfectly into the groove of support ring 10. This polygonal engagement design not only effectively restricts the relative rotation between filter cartridge 7 and support 8, but also provides stable support force in the axial direction, ensuring structural stability under torsional stress.

[0055] The mounting hole for the filter cartridge 7 on the support plate 3 is also designed as a polygon that matches the shape of the filter cartridge 7. The side length and angle of the polygon strictly correspond to the contour parameters of the filter cartridge 7. When the filter cartridge 7 passes through the mounting hole, the polygonal hole wall forms a multi-point contact limiting constraint with the outer side of the filter cartridge 7, further preventing the filter cartridge 7 from shifting or deflecting during airflow impact or dust removal vibration.

[0056] Reference Figures 5-10The dust filter assembly 6 also includes a cylinder 11 located at the bottom of the filter cartridge 7, and the cylinder 11 is mounted on the support plate 4. An inertia disk 12 is installed inside the cylinder 11, and conical springs 13 are symmetrically connected to both sides of the inertia disk 12. The conical springs 13 in symmetrical positions twist in opposite directions. A crossbar 14 is provided on one side of the conical bottom of the conical spring 13, and a buckle 15 is connected to the crossbar 14. The two buckles 15 are respectively connected to the bottom of the cylinder support 8 and the bottom of the inner cylinder 11.

[0057] Specifically, the bottom end of the filter cartridge 7 forms a sealed connection with the cylinder 11, which is vertically installed on the corresponding mounting hole of the support plate 4. Its internal space constitutes an independent vibration energy storage chamber. The inertia disk 12 is horizontally positioned at the center of the cylinder 11. Its symmetrical saucer-shaped structure concentrates the center of gravity on the axis of rotation. The center lines of the conical springs 13 on both sides coincide with the axis of rotation of the inertia disk 12, ensuring the coaxiality of force transmission.

[0058] The conical spring 13 adopts a variable-diameter helical structure design, with the diameter of the cone base being larger than that of the cone apex. This structure allows it to produce radial contraction deformation under axial compression, thus possessing both extensible and torsional elasticity. Two conical springs 13 are arranged in a mirror-symmetrical manner on both sides of the inertia disk 12, with opposite directions of torsion. When the filter cartridge 7 is impacted by a pulsed airflow, this symmetrical and opposite arrangement causes one side of the spring to be compressed and torsion clockwise, while the other side of the spring is compressed and torsion counterclockwise, forming a bidirectional torsional dynamic balance system.

[0059] The crossbar 14 provides a stable support base for the conical spring 13. The buckle 15 adopts an elastic clamp structure, forming a detachable locking relationship with the crossbar 14 and the corresponding connecting parts. The buckle 15 of the connecting cylinder support 8 is fixedly connected to the bottom end of the cylinder support 8 through a reserved hole at the bottom of the filter cylinder 7. This hole adopts a sealed design to prevent dust from entering the inside of the cylinder 11 and affecting the spring performance. The buckle 15 of the connecting cylinder 11 is firmly connected to the bottom of the cylinder 11 by thread or welding to ensure the reliability of the force transmission path.

[0060] When the pulse unit is activated, high-pressure airflow rushes in at high speed from the opening of the filter cartridge 7, creating an instantaneous positive pressure inside the filter cartridge 7. This pressure change first causes the filter cartridge 7 to elongate axially, returning from a torsional posture to its initial prismatic shape, while the cylinder support 8 deforms synchronously with the filter cartridge 7. This deformation is transmitted to the conical spring 13 through the buckle 15 at the bottom, causing it to undergo a combined axial compression and torsional deformation, converting the impact energy of the airflow into elastic potential energy for storage.

[0061] After the pulsed airflow ends, the internal pressure of the filter cartridge 7 drops rapidly, and the conical spring 13 begins to release its stored elastic potential energy. Since the springs on both sides twist in opposite directions, the released energy causes the filter cartridge 7 to produce periodic torsional vibrations, first twisting to its maximum angle in one direction, then twisting in the opposite direction to another extreme position, repeating this process until the energy is exhausted. This reciprocating torsional motion generates a complex stress distribution on the surface of the filter cartridge 7, making it easier for the attached dust particles to detach under the multi-angle vibration.

[0062] During vibration attenuation, the rotational inertia of the inertia disk 12 acts as an energy buffer and regulator. When the conical spring 13 releases energy too quickly, the inertia disk 12 absorbs some of the energy by accelerating its rotation; when the energy release of the spring slows down, the inertia disk 12 feeds back the stored kinetic energy to the spring system by decelerating its rotation, thus extending the vibration cycle. This dynamic energy balance mechanism enables the filter cartridge 7 to maintain high-frequency micro-amplitude vibration after the pulse airflow stops, significantly improving the dust removal effect.

[0063] Reference Figures 8-9 The cylinder support 8 is provided with multiple sets of multi-faceted rings 16, and multiple sets of blades 17 are provided on the multi-faceted rings 16. The tilting direction of the blades 17 is opposite to the torsion direction of the cylinder support 8.

[0064] Specifically, the polygonal rings 16 are evenly distributed within the frame formed by the supporting ribs, and their polygonal outlines are completely fitted to the inner wall of the filter cartridge 7. Each edge is fixedly connected to the corresponding supporting rib through an elastic connector. This multi-point support structure not only effectively prevents the filter cartridge 7 from localized dents under the impact of high-pressure airflow, but also reduces the damage to the filter material caused by vibration stress generated during the dust removal process through the buffering effect of the elastic connector.

[0065] Each corner of the polygonal ring 16 is equipped with a set of guide vanes 17. The vanes 17 adopt a streamlined curved surface design, and their tilt direction forms a specific angle with the torsion direction of the filter cartridge 7. When the pulsed airflow enters the filter cartridge 7, the high-speed airflow first impacts the surface of the vanes 17. Due to the tilt angle of the vanes 17, the airflow generates a tangential component force on the vanes 17, driving the polygonal ring 16 to rotate around the axis of the cylinder support 8. This rotation direction is opposite to the torsion direction of the filter cartridge 7, forming a pair of opposing torques, forcing the filter cartridge 7 to quickly return from its torsional posture to its initial prismatic shape.

[0066] During the vibration decay phase after the pulsed airflow ends, the inertial rotation of the polygonal ring 16 dynamically couples with the conical spring 13 system. When the filter cartridge 7 begins to twist in the opposite direction under the action of the spring, the rotating blades 17 generate a damping torque, slowing down the twisting speed and preventing structural damage to the filter cartridge 7 due to excessive rebound. This damping effect also prolongs the vibration period of the filter cartridge 7, making the dust removal process more thorough.

[0067] Reference Figures 1-3The dust filter chamber 1 is equipped with an air outlet pipe 18, which is connected to the front chamber of the support plate 3. The dust collection chamber 2 is equipped with an air inlet pipe 19, which is connected to the rear chamber of the support plate 3. The bottom of the dust collection chamber 2 is equipped with a dust outlet 20, which is equipped with a dust conveying device. When the dust in the dust collection chamber 2 accumulates to a certain level, the dust conveying device is turned on to transfer the ash.

[0068] Reference Figure 1 A monitoring door 21 is provided on the dust filter chamber 1 located in front of the support plate 3. The monitoring door 21 is used to check the status of the nozzles on the branch pipe 25 and to replace the filter cartridge 7 after opening.

[0069] Reference Figure 3 The pulse unit includes an air tank 22 located outside the dust filter chamber 1. Multiple electronic pulse valves 23 are connected to the air tank 22. The electronic pulse valves 23 are connected to pressure pipes 24. Multiple branch pipes 25 are connected to the pressure pipes 24. Each branch pipe 25 is located at the opening of a filter cartridge 7.

[0070] Specifically, when the dust adhering to the outside of the filter cartridge 7 accumulates to a certain extent, causing the filtration resistance to increase, the pulse unit will open the electronic pulse valve 23 according to a preset program or real-time monitoring signal, and the branch pipe 25 will instantly inject high-pressure gas into the filter cartridge 7. The high-pressure airflow forms a reverse impact inside the filter cartridge 7, causing the filter cartridge 7 to vibrate violently. At the same time, combined with the elastic deformation of the filter cartridge 7 itself, the dust adhering to the outside is shaken off. Since the corners of the polygonal prism-shaped filter cartridge 7 are stress concentration points, dust is more likely to detach from the filter material at these locations. In addition, the pleated structure formed by the torsional posture will produce multi-directional deformation under impact, further enhancing the dust removal effect and ensuring that the filter cartridge 7 can quickly restore its filtration performance.

[0071] Reference Figure 6 A sealing ring 26 is provided on the outside of the filter cartridge 7, and the sealing ring 26 is rotated and engaged in the support plate 2 4 to ensure the sealing between the filter cartridge 7 and the support plate 2 4 when the filter cartridge 7 is twisted.

[0072] The working principle of this invention: Smoke and dust gas enters the dust filter chamber 1 through the inlet pipe 19, and after being filtered by multiple dust filter components 6, it is discharged as air through the outlet pipe 18. When the smoke and dust attached to the outside of the filter cartridge 7 accumulates to a certain extent, causing the filtration resistance to increase, the pulse unit will open the electronic pulse valve 23 according to a preset program or real-time monitoring signal, and the branch pipe 25 will instantly inject high-pressure gas into the filter cartridge 7. The high-pressure airflow forms a reverse impact inside the filter cartridge 7, causing the filter cartridge 7 to vibrate violently. At the same time, in conjunction with the elastic deformation of the filter cartridge 7 itself, the smoke and dust attached to the outside is shaken off. Simultaneously, when the pulse unit is activated, the high-pressure airflow rushes in at high speed from the open end of the filter cartridge 7, forming an instantaneous positive pressure inside the filter cartridge 7. This pressure change first causes the filter cartridge 7 to elongate axially, returning from a torsional posture to its initial prismatic shape, while the cylinder support 8 deforms synchronously with the filter cartridge 7. This deformation is transmitted to the conical spring 13 through the buckle 15 at the bottom, causing it to undergo a combined axial compression and torsional deformation, converting the impact energy of the airflow into elastic potential energy for storage. After the pulsed airflow ends, the internal pressure of the filter cartridge 7 drops rapidly, and the conical spring 13 begins to release its stored elastic potential energy. Since the springs on both sides twist in opposite directions, the released energy causes the filter cartridge 7 to produce periodic torsional vibrations, first twisting to its maximum angle in one direction, then twisting in the opposite direction to another extreme position, repeating this process until the energy is exhausted. This reciprocating torsional motion generates a complex stress distribution on the surface of the filter cartridge 7, making it easier for the attached dust particles to detach under the multi-angle vibration.

[0073] Example 2, a second embodiment of the present invention, provides a process for preparing fracturing proppant ceramsite sand, using a bag filter for sintering waste gas treatment, including the following steps:

[0074] Step 1: Select raw materials such as bauxite and clay, crush and screen them to remove impurities, and feed them into a mixing device in proportion to stir evenly;

[0075] Step 2: Feed the mixed raw materials into a pellet mill, add an appropriate amount of water to form pellets, and perform preliminary screening on the pellets;

[0076] Step 3: Send the qualified pellets into the drying equipment to remove moisture using hot air or other methods;

[0077] Step 4: The dried spherical blanks are fed into the sintering kiln and sintered at high temperature;

[0078] Step 5: The waste gas generated during sintering is introduced into a bag filter for sintering waste gas treatment. After being filtered by filter cartridge 7, the purified gas is discharged by an induced draft fan.

[0079] Step Six: The sintered ceramsite sand is cooled to room temperature in a cooling device, then graded and screened by a screening device, and finally packaged and stored.

[0080] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A baghouse dust collector for treating sintering exhaust gas, comprising a dust filter chamber (1) and a dust collection chamber (2) disposed below the dust filter chamber (1), characterized in that: It also includes, The dust filtration unit is installed inside the dust filtration chamber (1); A pulse unit is installed inside the dust filter chamber (1) and is used to pulse high-pressure gas to the dust filter unit; The dust filtration unit includes a pair of parallel and vertically arranged support plates one (3) and support plate two (4). A horizontal plate (5) is arranged below the support plate one (3). Multiple dust filtration components (6) are arranged horizontally on the support plate one (3) and support plate two (4). Each dust filtration component (6) passes through the support plate one (3) and support plate two (4). The dust filtration component (6) includes a multi-prism-shaped filter cylinder (7). The opening of the filter cylinder (7) is arranged on one side of the support plate one (3). A cylinder support (8) is arranged inside the filter cylinder (7). The cylinder support (8) includes multiple parallel support ribs. The number of support ribs corresponds to the corners of the filter cylinder (7) and the support ribs abut against the corners inside the filter cylinder (7). During dust filtration, the filter cartridge (7) and the support (8) are in a twisted position; The dust filter assembly (6) also includes a cylinder (11) disposed at the bottom of the filter cartridge (7) and the cylinder (11) is disposed on the second support plate (4). An inertia disk (12) is disposed inside the cylinder (11). Conical springs (13) are symmetrically connected to both sides of the inertia disk (12). One side of the conical spring (13) is connected to the bottom of the cylinder support (8), and the other side of the conical spring (13) is connected to the bottom inside the cylinder (11). The conical springs (13) in symmetrical positions have opposite twisting directions. The conical spring (13) has a crossbar (14) on one side of the cone bottom, and a buckle (15) is connected to the crossbar (14). The two buckles (15) are respectively connected to the bottom of the cylinder support (8) and the bottom of the inner cylinder (11). The cylindrical support (8) is provided with multiple sets of polygonal rings (16), and multiple sets of blades (17) are provided on the polygonal rings (16). The tilting direction of the blades (17) is opposite to the twisting direction of the cylindrical support (8).

2. The bag filter for sintering waste gas treatment according to claim 1, characterized in that: The filter cartridge (7) is provided with a support ring 1 (9) at the opening and a support ring 2 (10) at the opening of the support rib. The support ring 1 (9) is engaged in the support ring 2 (10).

3. The bag filter for sintering waste gas treatment according to claim 1, characterized in that: The dust filter chamber (1) is provided with an air outlet pipe (18) and the air outlet pipe (18) is connected to the front chamber of the support plate (3). The dust collection chamber (2) is provided with an air inlet pipe (19) and the air inlet pipe (19) is connected to the rear chamber of the support plate (3). The bottom of the dust collection chamber (2) is provided with an ash outlet (20).

4. The bag filter for treating sintering waste gas according to claim 1, characterized in that: A monitoring door (21) is provided on the dust filter chamber (1) located in front of the support plate (3).

5. The bag filter for treating sintering waste gas according to claim 1, characterized in that: The pulse unit includes an air tank (22) located outside the dust filter chamber (1). Multiple electronic pulse valves (23) are connected to the air tank (22). The electronic pulse valves (23) are connected to pressure pipes (24). Multiple branch pipes (25) are connected to the pressure pipes (24). Each branch pipe (25) is located at the opening of a filter cartridge (7).

6. The bag filter for treating sintering waste gas according to claim 1, characterized in that: A sealing ring (26) is provided on the outside of the filter cartridge (7), and the sealing ring (26) is rotated and engaged in the support plate (4).

7. The process for preparing fracturing proppant ceramsite sand, using the bag filter for sintering waste gas treatment as described in claim 1, is characterized in that... Includes the following steps: Step 1: Select bauxite and clay raw materials, crush and screen them to remove impurities, and feed them into a mixing device in proportion to stir evenly; Step 2: Feed the mixed raw materials into a pellet mill, add water to form pellets, and perform preliminary screening on the pellets; Step 3: Send the qualified pellets into the drying equipment and remove moisture by hot air. Step 4: The dried spherical blanks are fed into the sintering kiln and sintered at high temperature; Step 5: The waste gas generated during sintering is introduced into a bag filter for sintering waste gas treatment. After being filtered by the filter cartridge (7), the purified gas is discharged by the induced draft fan. Step Six: The sintered ceramsite sand is cooled to room temperature in a cooling device, then graded and screened by a screening device, and finally packaged and stored.

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