A cloth bag dust collector for production of calcined coke

Abstract

This invention belongs to the field of dust collector technology, specifically disclosing a baghouse dust collector for post-calcined coke production. It includes a shell, with a dividing disc fixed inside the shell. Filter bags are evenly spaced through the dividing disc. An air-blowing structure is distributed above the filter bags inside the shell. A frame is inserted inside the filter bags to support them and maintain their proper shape. The filter bags include an upper bag body, a movable filter bag, and an exhaust pipe. The upper bag body is a tubular structure open at both ends, and the movable filter bag is a tubular structure sealed at the bottom. This invention systematically solves problems such as filter bag caking, high-temperature material conflicts, deformation short circuits, dust removal attenuation, and difficulty in maintaining the pre-coating layer through the physical anti-adhesion of multi-layer composite filter media and surface coating, the chemical isolation of the pre-coating sacrificial layer, the oscillating flexural vibration of flexible suspension and spring return, and the impact vibration of the frame guidance and intermittent jet blowing. This achieves efficient, low-resistance filtration and sustained operation of high-viscosity flue gas.

Description

Technical Field

[0001] This invention belongs to the field of dust collector technology, and specifically discloses a bag dust collector for calcined coke production. Background Technology

[0002] The high-temperature, dust-laden flue gas generated during the production of calcined coke contains a large amount of fine dust, as well as tar vapor, volatile organic compounds, and other sticky components. Its temperature typically fluctuates between 160℃ and 260℃. Baghouse dust collectors are widely used for purifying this type of flue gas due to their high dust removal efficiency and stable operation. The core principle is that as the dust-laden flue gas passes through the fiber layer of the filter bag, the dust is intercepted and adheres to the surface of the filter bag, and the purified gas is discharged from inside the bag. However, when conventional baghouse dust collectors directly treat calcined coke flue gas, the tar-like sticky substances carried in the flue gas cause the dust to adhere firmly to the fibers, forming a difficult-to-remove caking layer that clogs the filter pores. This leads to a sharp increase in operating resistance, and traditional pulse-jet cleaning is ineffective in removing this sticky dust. The filter bag's service life is often less than 6 months, far below the design life under normal operating conditions.

[0003] Meanwhile, high-temperature environments place stringent comprehensive performance requirements on filter bag materials. Existing filter media exhibit contradictions in their temperature resistance, corrosion resistance, and anti-adhesion properties: ordinary polyester fibers lack sufficient temperature resistance and are prone to shrinkage and deformation at high temperatures; while fiberglass woven fabrics offer good temperature resistance, they suffer from low filtration accuracy and poor folding resistance; PTFE-coated filter media possess excellent anti-adhesion properties, but are costly, and the coating layer is easily damaged during frequent dust removal. Furthermore, in actual operation, filter bags experience severe swaying and deformation due to flue gas impact, leading not only to mutual wear between bags but also to uneven cracking of the dust cake layer, creating airflow short circuits and significantly reducing filtration efficiency; while rigid support frames can maintain the bag's shape, they cannot effectively absorb vibration energy, instead exacerbating bag friction and limiting the flexural deformation required for dust removal, hindering dust removal.

[0004] Existing dust removal methods generally suffer from unsatisfactory results. Pulse jet cleaning and mechanical rapping have limited effectiveness in removing sticky dust, and the vibration energy attenuates significantly along the length of the filter bag, often leaving the lower part of the bag incompletely cleaned, with dust residue rates reaching over 30%. Some projects employ pre-coating technology, pre-spraying inert powder onto the filter bag surface as a "sacrificial layer" to isolate tar and sticky dust. However, the thickness of the pre-coating is difficult to control precisely, and the protective layer detaches along with the dust during cleaning, requiring frequent powder replenishment. Furthermore, the lack of automatic monitoring and replenishment mechanisms makes it difficult to maintain effective protection in the long term. In summary, existing technologies still have significant shortcomings in treating highly adhesive, high-temperature flue gas such as calcined coke, particularly in areas such as the synergistic optimization of filter bag material's anti-adhesion, temperature resistance, and strength; the organic integration of bag deformation resistance support and vibration cleaning; the rational utilization of flue gas impact energy; and the long-term maintenance of the pre-coating.

[0005] Therefore, there is an urgent need in this field to develop a bag filter dust collector and its filter bag structure that can effectively cope with such challenging working conditions and has both excellent filtration performance and long-lasting dust removal capability. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide a bag filter for calcined coke production, so as to solve the problems mentioned in the background art that it cannot effectively cope with high-difficulty filtration conditions, does not have excellent filtration performance and cannot maintain dust removal for a long time.

[0007] To achieve the above objectives, the present invention provides a bag filter for calcined coke production, comprising a housing, a dividing plate fixed inside the housing, filter bags passing through the dividing plate at equal intervals, an air blowing structure distributed above the filter bags inside the housing, and a skeleton inserted inside the filter bags for supporting the filter bags and maintaining their appropriate shape. In the above technical solution, the filter bag further includes an upper bag body, a movable cloth bag, and an exhaust pipe; In the above technical solution, the upper bag body is a tube structure with openings at both the top and bottom, the movable cloth bag is a tube structure with a sealed bottom, the movable cloth bag is integrally fixed to the lower end of the upper bag body, and the exhaust pipe is fixed to the upper end of the upper bag body. The upper bag body and the movable cloth bag together form a tube structure for filtering flue gas. In the above technical solution, a flexible ring is further fitted and fixed to the upper part of the outer wall of the upper bag body. The flexible ring is used to seal the part of the upper bag body that penetrates the dividing plate, and at the same time, it drives the upper bag body to be stably connected to the dividing plate. A connecting spring is fixed at equal intervals between the top surface of the dividing plate and the exhaust pipe. The connecting spring, together with the flexible ring, provides stable support for the exhaust pipe. In the above technical solution, further, multiple sets of embossed fabrics are fixed at equal intervals along the longitudinal direction on the outer wall of the upper bag body and the movable cloth bag. The embossed fabrics are sewn onto the upper bag body and the movable cloth bag. The embossed fabrics are made of breathable fabric material. There is a gap between two adjacent embossed fabrics for guiding the flue gas to be filtered.

[0008] In the above technical solution, the upper bag body and the movable cloth bag further include an outer cloth bag, an inner cloth bag and an air guide bag; In the above technical solution, the inner cloth bag is sewn to the outside of the air guide bag, the outer cloth bag is sewn to the outside of the inner cloth bag, the textured cloth is sewn to the outside of the outer cloth bag, the edge of the textured cloth is heat-fused to the outer cloth bag, the edge of the outer cloth bag is heat-fused to the inner cloth bag, and the edge of the inner cloth bag is heat-fused to the air guide bag, so as to prevent smoke and dust from entering the gap between the two adjacent layers.

[0009] In the above technical solution, the textured fabric, outer bag, inner bag and air duct are all made of flexible and breathable material. The outer wall of the textured fabric and outer bag is coated with a fluorocarbon coating, which can form an oleophobic and hydrophobic surface on the outer wall of the textured fabric and outer bag, reducing the adhesion of tar and wet dust.

[0010] In the above technical solution, the frame further includes a tie rod, a vibration guide ring, a limiting block, a slide rod, and a vibration guide strip; In the above technical solution, the pull rod is further defined as a U-shaped rod, which is distributed inside the cavity formed by the exhaust pipe and the outer cloth bag. The upper end of the pull rod is fixed to the exhaust pipe, and the slide rod is hooked to the lower part of the pull rod. The lower end of the slide rod is fixed to the bottom wall of the inner cavity of the movable cloth bag. The limiting block is fixed on the pull rod and located directly above the slide rod. The vibration guide ring is fixed to the inner wall of the air guide bag. A vibration guide strip is fixed between the vibration guide ring, the pull rod, and the slide rod. The vibration guide ring, the limiting block, the slide rod, and the vibration guide strip are all made of materials with good vibration conduction performance and are used to transmit vibration to the upper bag body and the movable cloth bag.

[0011] In the above technical solution, a sliding groove is further provided on the pull rod below the limiting block, the slide rod slides on the sliding groove, and a return spring is fixed between the upper end of the slide rod and the limiting block. The return spring is used to support the slide rod and realize the slide rod sliding stably on the sliding groove.

[0012] In the above technical solution, the housing further includes a purification chamber, a collection chamber, and a dust discharge hopper; In the above technical solution, the purification chamber is further defined as a tubular structure with openings at the upper and lower ends, the dividing disc is fixed in the upper part of the inner cavity of the purification chamber, the collecting chamber is fixed in the upper end of the purification chamber, and the dust discharge hopper is fixed in the lower end of the purification chamber.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The filter bag in this invention adopts a multi-layer composite structure of an outer bag, an inner bag, and an air guide bag. The outer bag is mainly made of P84 fiber needle-punched felt, which takes advantage of its large specific surface area and dust holding capacity due to its trilobal cross-section. The inner bag is made of PTFE-coated fiberglass woven fabric to provide structural strength and withstand temperatures above 260°C. The air guide bag is made of conductive fiber blended fabric to prevent static electricity accumulation from causing dust explosions. At the same time, the surface of the outer bag is embossed to form a diamond-shaped micro-protrusion texture, which reduces the dust contact area and reduces adhesion, while also forming micro-airflow channels to make the flue gas distribution more uniform. It can also generate micro-stretching during filtration, causing the dust layer to crack and fall off preferentially from the top of the protrusions, which significantly promotes dust removal.

[0014] 2. In this invention, multiple sets of embossed fabrics are fixed at equal intervals along the longitudinal direction on the upper bag body and the outer wall of the movable filter bag. There are gaps between adjacent embossed fabrics, allowing flue gas to rise and flow along these gaps, preventing dust from accumulating and depositing. Both the embossed fabrics and the outer wall of the outer filter bag are coated with a fluorocarbon coating to form an oleophobic and hydrophobic surface, effectively reducing the adhesion of tar and wet dust to the fibers and preventing pore blockage. On this basis, dried calcined coke powder is sprayed in through a pre-coating process to form an inert powder cake layer with a thickness of 0.5-1mm on the surface of the filter bag as a "sacrificial layer," preventing tar and sticky dust in the subsequent flue gas from directly contacting the filter bag fibers. After each cleaning, powder is automatically sprayed to maintain the thickness of the protective layer, thereby significantly extending the service life of the filter bag.

[0015] 3. In this invention, the filter bag is sealed to the dividing plate via a flexible ring, and a connecting spring is installed between the exhaust pipe and the dividing plate. When the flue gas enters the purification chamber, its impact force can cause the entire filter bag to swing on the dividing plate, causing the dust attached to the filter bag to shake off during the swing. At the same time, the reset spring adjusts the distance between the upper end of the slide rod and the limiting block based on its own elasticity, so that the connection between the movable bag and the upper bag body is repeatedly bent and tightened during the alternating process of flue gas blowing and stopping air blowing for dust removal. This bending action causes the outer bag to vibrate, further promoting the dust particles to fall off and fall into the dust hopper, thus realizing the synergistic dust removal by combining mechanical vibration and airflow impact.

[0016] 4. The coordinated arrangement of the tie rod, slide rod, vibration guide ring, and vibration guide strip in the skeleton structure of this invention not only effectively supports the filter bag, ensuring it maintains its hollow columnar structure without deformation during operation and guaranteeing smooth passage of flue gas through the filter bag, but also plays a role during dust removal: when the gas distribution pipe intermittently blows air into the upper bag, the impact force drives the slide rod downward, and the upper bent part of the slide rod collides with the lower bent part of the tie rod to generate vibration. This vibration is transmitted to the vibration guide ring through the vibration guide strip, and then from the vibration guide ring to the entire filter bag, thereby achieving multiple impact vibration dust removal; at the same time, the downward movement of the slide rod also tightens the connection between the movable bag and the upper bag body, causing repeated movement under the action of the return spring, transmitting vibration energy through multiple paths, effectively solving the problem of dust removal energy attenuation at the lower part of the bag body, making dust removal more thorough and avoiding clogging of the filter pores. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a diagram showing the connection structure between the diversion tube and the collection chamber in this invention; Figure 3 This is a diagram showing the connection structure between the upper bag body and the movable cloth bag in this invention; Figure 4 This is a diagram showing the connection structure between the exhaust pipe and the upper bag body in this invention; Figure 5 for Figure 4Cross-sectional structural diagram; Figure 6 This is a diagram showing the connection structure between the upper bag body and the dividing plate in this invention; Figure 7 for Figure 5 Enlarged view of A in the middle; Figure 8 This is a structural diagram of the upper bag body and the movable cloth bag in this invention; Figure 9 for Figure 6 A magnified view of B in the middle.

[0018] 1. Collection chamber; 11. Purification chamber; 12. Dust hopper; 13. Diverter pipe; 14. Divider plate; 15. Exhaust pipe; 16. Air distribution pipe; 2. Outer cloth bag; 21. Textured cloth; 22. Movable cloth bag; 23. Flexible ring; 24. Pull rod; 25. Vibration guide ring; 26. Limiting block; 27. Slide rod; 28. Connecting spring; 29. ​​Inner cloth bag; 210. Air guide bag; 211. Return spring; 212. Sliding groove; 213. Vibration guide strip. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0021] Example 1: Please refer to Figures 1-9 As shown, the present invention provides a technical solution: This invention is a bag filter for calcined coke production, comprising a shell, a dividing plate 14 fixed inside the shell, filter bags passing through the dividing plate 14 at equal intervals, an air blowing structure distributed above the filter bags inside the shell, and a skeleton inserted inside the filter bags. The filter bag includes an upper bag body, a movable cloth bag 22, and an exhaust pipe 15; The upper bag body is a tubular structure with openings at both ends, the movable bag 22 is a tubular structure with a sealed bottom end, the movable bag 22 is integrally fixed to the lower end of the upper bag body, and the exhaust pipe 15 is fixed to the upper end of the upper bag body. A flexible ring 23 is fixedly fitted to the upper part of the outer wall of the upper bag body. The flexible ring 23 is used to seal the part of the upper bag body that passes through the dividing plate 14. A connecting spring 28 is fixed at equal intervals between the top surface of the dividing plate 14 and the exhaust pipe 15. Multiple sets of textured fabric 21 are fixed at equal intervals along the longitudinal direction on the outer wall of the upper bag body and the movable bag 22. The textured fabric 21 is sewn onto the upper bag body and the movable bag 22 and is breathable.

[0022] Each group of embossed fabrics 21 has multiple embossed fabrics 21, which are distributed at equal intervals, with a gap between adjacent embossed fabrics 21.

[0023] The upper bag body and movable bag 22 include an outer bag 2, an inner bag 29 and an air guide bag 210. The outer bag 2 is made of P84 (polyimide) fiber needle-punched felt. P84 fiber has a trilobal cross section, a large specific surface area and a high dust holding capacity. The inner bag 29 is made of PTFE-coated fiberglass woven fabric, which provides structural strength and can withstand temperatures up to 260°C. The air guide bag 210 is made of conductive fiber blended fabric to prevent static electricity accumulation from causing dust explosion. The P84 needle-punched felt of the outer filter bag 2 is suitable for long-term working conditions with a temperature ≤240℃. When the flue gas temperature reaches 260℃ instantaneously, the PTFE-coated fiberglass cloth of the inner filter bag 29 serves as the main heat-bearing layer to provide temperature protection. The continuous operating temperature of the entire filter bag should not exceed 240℃. If it does, the pre-cooled flue gas or mixing air device needs to be turned on. The outer bag 2, inner bag 29 and air guide bag 210 are connected by needle punching and hot melt bonding processes to ensure a strong interlayer bond. The outer surface of the outer bag 2 is formed with regular diamond-shaped micro-protrusion texture through embossing process. This texture can reduce the dust contact area and reduce the dust adhesion force. At the same time, it forms a micro airflow channel for flue gas flow, making the contact between flue gas and outer bag 2 more uniform. It can also cause the outer bag 2 to expand and deform, producing micro-protrusion stretching, causing the dust layer to crack and fall off preferentially from the top of the protrusion, thereby promoting dust peeling. The inner fabric bag 29 is sewn to the outside of the air guide bag 210, the outer fabric bag 2 is sewn to the outside of the inner fabric bag 29, the textured fabric 21 is sewn to the outside of the outer fabric bag 2, the edge of the textured fabric 21 is heat-fused to the outer fabric bag 2, the edge of the outer fabric bag 2 is heat-fused to the inner fabric bag 29, and the edge of the inner fabric bag 29 is heat-fused to the air guide bag 210, thereby preventing smoke or dust particles from entering between adjacent fabric layers.

[0024] The textured fabric 21, outer bag 2, inner bag 29 and air guide bag 210 are all made of flexible breathable material. The outer walls of the textured fabric 21 and outer bag 2 are coated with fluorocarbon coating. The exhaust pipe 15 is a rigid tapered pipe with a small opening at the top and a large opening at the bottom.

[0025] The frame includes a tie rod 24, a vibration guide ring 25, a limiting block 26, a slide rod 27, and a vibration guide strip 213; The pull rod 24 is a U-shaped rod, which is distributed inside the cavity formed by the exhaust pipe 15 and the outer cloth bag 2. The upper end of the pull rod 24 is fixed to the exhaust pipe 15. The slide rod 27 is hooked to the lower part of the pull rod 24. The lower end of the slide rod 27 is fixed to the bottom wall of the inner cavity of the movable cloth bag 22. The limiting block 26 is fixed on the pull rod 24 and located directly above the slide rod 27. The vibration guide ring 25 is fixed to the inner wall of the air guide bag 210. A vibration guide strip 213 is fixed between the vibration guide ring 25, the pull rod 24, and the slide rod 27. The vibration guide strip 213 is a thin stainless steel rod with a diameter of 3 to 5 mm. Four to six strips are evenly distributed along the circumference of the vibration guide ring 25. The vibration guide strip 213 is arranged along the axial direction of the filter bag. The sum of their cross-sectional areas is less than 5% of the cross-sectional area of ​​the filter bag cavity, so as not to affect the upward discharge of the purified gas. The lower end of the movable bag 22 is sewn with a circular reinforcing bottom fabric, and a metal buckle is embedded in the center of the bottom fabric; the lower end of the slide bar 27 is provided with external threads or claws, which pass through the metal buckle and are fixedly connected to the bottom fabric by locking nuts or pressure caps, so as to ensure that the movable bag 22 moves synchronously with the slide bar 27 when vibrating.

[0026] A sliding groove 212 is provided on the pull rod 24 below the limit block 26. The slide rod 27 slides on the sliding groove 212. A return spring 211 is fixed between the upper end of the slide rod 27 and the limit block 26. The housing includes a purification chamber 11, a collection chamber 1, and a dust discharge hopper 12; The purification chamber 11 is a tubular structure with openings at the top and bottom. The dividing plate 14 is fixed in the upper part of the inner cavity of the purification chamber 11, the collecting chamber 1 is fixed in the upper part of the purification chamber 11, and the dust discharge hopper 12 is fixed in the lower part of the purification chamber 11. In actual use, external equipment drives the calcined coke flue gas to be transported into the purification chamber 11. When the calcined coke flue gas enters the purification chamber 11, it can expand inside the purification chamber 11. Subsequently, large dust particles in the calcined coke flue gas can fall into the dust hopper 12 under the action of gravity. The upward-moving calcined coke flue gas can contact the outer wall of the upper bag body and the movable filter bag 22. When the calcined coke flue gas passes through the upper bag body and the movable filter bag 22, the upper bag body and the movable filter bag 22 can filter the dust in the calcined coke flue gas, thereby realizing the separation of dust and flue gas entering the purification chamber 11. The upper part of the outer wall of the outer bag 2 is connected to the dividing plate 14 by a flexible ring 23. A connecting spring 28 is provided between the exhaust pipe 15 and the dividing plate 14. When the calcined coke flue gas enters the interior of the purification chamber 11, the impact force generated by the calcined coke flue gas can drive the upper bag body and the movable bag 22 to swing on the dividing plate 14, thereby shaking off the dust on the upper bag body and the movable bag 22. One end of the connecting spring 28 is connected to the dividing plate 14 through a spherical washer or a universal joint, and the other end is connected to the ear plate on the outer wall of the exhaust pipe 15 through the same joint structure. This allows the exhaust pipe 15 to produce a radial sway of ≤5° relative to the dividing plate 14 under the impact of flue gas. At the same time, the connecting spring 28 only bears axial tension, avoiding bending stress concentration. This ensures the stable use of the connecting spring 28 while enabling the filter bag to swing stably on the dividing plate 14, so that the dust particles on the filter bag can be separated under the action of inertia. In actual use, the vibration guide ring 25 can support the upper bag body and the movable cloth bag 22, thereby enabling the upper bag body and the movable cloth bag 22 to work in a hollow columnar structure, avoiding the deformation of the upper bag body and the movable cloth bag 22 when the calcined coke flue gas impacts the upper bag body and the movable cloth bag 22, thus ensuring that the calcined coke flue gas can smoothly pass through the upper bag body and the movable cloth bag 22. When the calcined coke flue gas comes into contact with the upper bag body and the movable filter bag 22, the calcined coke flue gas can rise along the gap between the two convex cloths 21 because there is a gap between the two adjacent convex cloths 21. Each set of convex cloths 21 is a strip of cloth sewn along the circumference of the outer wall of the filter bag. Multiple sets of convex cloths 21 are arranged at equal intervals along the longitudinal direction of the filter bag. The longitudinal gap between two adjacent sets of annular convex cloths 21 forms an annular airflow channel. The dust-laden flue gas flows from bottom to top along the longitudinal gap and evenly contacts the surface of the outer filter bag 2. The outer walls of the textured fabric 21 and the outer bag 2 are coated with a fluorocarbon coating, which can form an oleophobic and hydrophobic surface on the outer walls of the textured fabric 21 and the outer bag 2, thereby reducing the adhesion of tar and wet dust to the textured fabric 21 and the outer bag 2 and preventing the pores on the textured fabric 21 and the outer bag 2 from being blocked. If the staff wants to use the bag filter to filter easily adhered calcined coke flue gas, they can pre-coat the filter bags before filtering the flue gas. Specifically, the external equipment sprays dry calcined coke fine powder into the purification chamber 11. The fine powder will form an inert powder cake layer with a thickness of about 0.5 to 1 mm on the surface of the filter bag. This powder cake layer acts as a "sacrificial layer" to prevent tar and sticky dust in the subsequent flue gas from directly contacting the filter bag fibers, thereby preventing easily adhered calcined coke flue gas from adhering to the filter bag. After each cleaning, part of the powder cake layer falls off. Before the bag filter starts working, the external equipment automatically sprays powder into the purification chamber 11 to maintain the thickness of the protective layer. The lower part or side wall of the purification chamber 11 is provided with a pre-coated powder spraying port, which is connected to the external powder storage bin and metering feeder through a pipe; a differential pressure sensor is provided above the dividing plate 14 or inside the collection chamber 1. When the pressure difference before and after the filter bag is lower than the set value (indicating that the sacrificial layer is too thin), the controller starts the metering feeder to spray dry calcined coke fine powder into the purification chamber 11 in a quantitative manner. The amount of powder added is 50 to 100 g / m² based on the area of ​​the filter bag. It should be noted that after the upper bag body and the movable cloth bag 22 filter the calcined coke flue gas, the connecting spring 28 and the flexible ring 23 can use their own restoring force to drive the filter bag back to the state before use. At this time, the filter bag is vertically distributed on the dividing plate 14, so that the upper end of the exhaust pipe 15 is opposite to the air blowing structure, which facilitates the subsequent air blowing structure to blow air into the inside of the filter bag, thereby realizing the separation of smoke and dust on the embossed cloth 21 and the outer cloth bag 2.

[0027] Example 2: Please refer to Figures 1-9 As shown, based on Embodiment 1, the present invention provides a technical solution: The air blowing structure includes a split pipe 13 and an air split pipe 16; The diverter pipe 13 is fixed to the inner wall of the collection chamber 1 and is located above the exhaust pipe 15. The gas splitter pipe 16 is fixed below the diverter pipe 13. The inner cavity of the diverter pipe 13 and the inner cavity of the gas splitter pipe 16 are connected. The gas splitter pipe 16 is inserted into the interior of the exhaust pipe 15. During normal use, the return spring 211 can adjust the distance between the upper end of the slide bar 27 and the limit block 26 by its own elasticity, thereby bending the connection between the movable bag 22 and the upper bag body. When the calcined coke flue gas blows on the movable bag 22, the movable bag 22, the slide bar 27, and the vibration guide ring 25 can rely on their own inertia to drive the connection between the movable bag 22 and the upper bag body to tighten, thereby realizing the slide bar 27 moving up and down on the pull rod 24, so that the movable bag 22 and the upper bag body can filter the calcined coke flue gas. When the calcined coke flue gas stops being transported inside the purification chamber 11, the reset spring 211 can adjust the distance between the upper end of the slide rod 27 and the limit block 26 by its own elasticity. At this time, the slide rod 27 moves up on the pull rod 24, which causes the connection between the movable bag 22 and the upper bag body to bend again. When the connection between the movable bag 22 and the upper bag body is bent, the outer bag 2 of the movable bag 22 and the upper bag body can vibrate, which causes the dust particles on the outer bag 2 to fall off. The fallen dust particles can fall into the interior of the dust hopper 12 under the action of gravity, thereby realizing the centralized discharge of dust particles by the dust hopper 12. When the diversion pipe 13 blows air into the interior of the upper bag body through the air diversion pipe 16, since the inner cavity of the upper bag body and the movable cloth bag 22 are connected, the impact force generated by the exhaust of the air diversion pipe 16 can drive the movable cloth bag 22 to move downward, thereby realizing the separation of dust particles on the movable cloth bag 22 under the action of inertia. Simultaneously, the slide rod 27 moves up and down on the pull rod 24. When the air distribution pipe 16 intermittently blows air into the upper bag body, the air pressure pushes the slide rod 27 to slide down along the sliding groove 212. At this time, the bent part at the upper end of the slide rod 27 and the bent part at the lower end of the pull rod 24 produce an instantaneous rigid impact. The impact vibration is transmitted to the vibration guide ring 25 through the vibration guide strip 213 and radiates to the entire filter bag. At the same time, the return spring 211 is stretched. When the blowing stops, the return spring 211 pulls the slide rod 27 to quickly return to its original position by its own elasticity, so that the bent part at the upper end of the slide rod 27 can impact the bent part at the lower end of the pull rod 24 again. In order to achieve multiple impacts between the upper bent part of the slide rod 27 and the lower bent part of the pull rod 24, so that the vibrations generated by the slide rod 27 and the pull rod 24 are transmitted to the vibration guide ring 25 through the vibration guide strip 213, the air distribution pipe 16 can intermittently blow air into the inside of the upper bag. The advantages of this design are that, on the one hand, the gas discharged from the air distribution pipe 16 can blow the dust particles filtered by the filter bag, and on the other hand, the vibration guide ring 25 can transmit the vibration to the filter bag, thereby shaking off the dust particles on the filter bag and thus avoiding clogging of the pores of the filter bag.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A baghouse dust collector for calcined coke production, characterized in that, Includes a housing, inside which a dividing plate (14) is fixed, and filter bags are equally spaced through the dividing plate (14). Inside the housing, above the filter bags, there are air blowing structures, and inside the filter bags, there is a skeleton. The filter bag includes an upper bag body, a movable cloth bag (22), and an exhaust pipe (15); The upper bag body is a tube structure with openings at both ends, the movable cloth bag (22) is a tube structure with a sealed bottom end, the movable cloth bag (22) is integrally fixed to the lower end of the upper bag body, and the exhaust pipe (15) is fixed to the upper end of the upper bag body. A flexible ring (23) is fixedly fitted to the upper part of the outer wall of the upper bag body. The flexible ring (23) is used to seal the part of the upper bag body that passes through the dividing plate (14). A connecting spring (28) is fixed at equal intervals between the top surface of the dividing plate (14) and the exhaust pipe (15). Multiple sets of textured fabric (21) are fixed at equal intervals along the longitudinal direction on the outer wall of the upper bag body and the movable bag (22). The textured fabric (21) is sewn onto the upper bag body and the movable bag (22) and is breathable.

2. A baghouse dust collector for calcined coke production according to claim 1, characterized in that, Each group of the embossed fabrics (21) has multiple distributions, and the multiple embossed fabrics (21) are distributed at equal intervals, with a gap between adjacent embossed fabrics (21).

3. A baghouse dust collector for calcined coke production according to claim 1, characterized in that, The upper bag body and movable cloth bag (22) include an outer cloth bag (2), an inner cloth bag (29) and an air guide bag (210); The inner bag (29) is sewn to the outside of the air guide bag (210), the outer bag (2) is sewn to the outside of the inner bag (29), the textured fabric (21) is sewn to the outside of the outer bag (2), the edge of the textured fabric (21) and the outer bag (2) are heat-fused together, the edge of the outer bag (2) and the inner bag (29) are heat-fused together, and the edge of the inner bag (29) and the air guide bag (210) are heat-fused together.

4. A bag filter for calcined coke production according to claim 3, characterized in that, The textured fabric (21), outer bag (2), inner bag (29) and air guide bag (210) are all made of flexible breathable material. The outer walls of the textured fabric (21) and outer bag (2) are coated with fluorocarbon coating. The exhaust pipe (15) is a rigid tapered pipe with a small opening at the top and a large opening at the bottom.

5. A baghouse dust collector for calcined coke production according to claim 1, characterized in that, The frame includes a tie rod (24), a vibration guide ring (25), a limiting block (26), a slide rod (27), and a vibration guide strip (213). The pull rod (24) is a U-shaped rod. The pull rod (24) is distributed inside the cavity formed by the exhaust pipe (15) and the outer cloth bag (2). The upper end of the pull rod (24) is fixed to the exhaust pipe (15). The slide rod (27) is hung on the lower part of the pull rod (24). The lower end of the slide rod (27) is fixed to the movable cloth bag (22). The limiting block (26) is fixed on the pull rod (24) and located directly above the slide rod (27). The vibration guide ring (25) is fixed on the inner wall of the air guide bag (210). A vibration guide strip (213) is fixed between the vibration guide ring (25), the pull rod (24), and the slide rod (27).

6. A baghouse dust collector for calcined coke production according to claim 5, characterized in that, The pull rod (24) has a sliding groove (212) located below the limiting block (26), the slide rod (27) slides on the sliding groove (212), and a return spring (211) is fixed between the upper end of the slide rod (27) and the limiting block (26).

7. A baghouse dust collector for calcined coke production according to claim 1, characterized in that, The housing includes a purification chamber (11), a collection chamber (1), and a dust discharge hopper (12). The purification chamber (11) is a tubular structure with openings at the top and bottom. The dividing plate (14) is fixed in the upper part of the inner cavity of the purification chamber (11), the collecting chamber (1) is fixed in the upper part of the purification chamber (11), and the dust hopper (12) is fixed in the lower part of the purification chamber (11).

8. A bag filter for calcined coke production according to claim 1, characterized in that, The air blowing structure includes a split pipe (13) and an air split pipe (16); The diverter pipe (13) is fixed on the inner wall of the collection chamber (1) above the exhaust pipe (15), and the gas splitting pipe (16) is fixed below the diverter pipe (13). The inner cavity of the diverter pipe (13) and the inner cavity of the gas splitting pipe (16) are connected. The gas splitting pipe (16) is inserted into the interior of the exhaust pipe (15).

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