Steel dust collecting cloth bag dust collector and secondary utilization method

Abstract

The application relates to the technical field of dust removal equipment, in particular to a cloth bag dust collector for collecting steel dust removal ash and a secondary utilization method, which comprises a cloth bag dust collector body, a driving motor, a flow guide assembly, a suction plate, a collecting assembly and a scraper. A flower plate and a flow separation plate are arranged in the cloth bag dust collector body from top to bottom, the flower plate and the flow separation plate divide the cloth bag dust collector body into a clean gas chamber, a filter chamber and an ash collecting chamber, filter bags are arranged on the flower plate in a grid array, and ash removal devices corresponding to the filter bags are arranged in the clean gas chamber; the driving motor is arranged in the flow separation plate, a flow guide assembly is arranged below the driving motor, the flow guide assembly is provided with the suction plate in an array, the driving motor drives the suction plate to slide through the flow guide assembly, the collecting assembly is arranged below the flow guide assembly, and the scraper is arranged below the collecting assembly; and the flow guide assembly drives the scraper to reciprocatingly slide through the collecting assembly. The application improves the cleaning efficiency and the collecting efficiency of the cloth bag dust collector on dust removal ash, and improves the secondary utilization efficiency of the dust removal ash.

Description

Technical Field

[0001] This invention relates to the field of dust removal equipment technology, specifically to a bag filter for collecting dust from steelmaking and a method for its secondary utilization. Background Technology

[0002] Steel is an alloy containing elements such as carbon and iron. It has the characteristics of high strength, corrosion resistance and plasticity, and is widely used in construction, manufacturing and transportation. However, the steel metallurgical production process generates a large amount of dust, which is harmful to the environment and workers' health. Therefore, bag filters are often used as air purification equipment for steel dust.

[0003] A baghouse dust collector mainly consists of a shell, filter bags, and a cleaning device. The lower end of the shell is a dust hopper, and an air inlet is located above the hopper. A grid array of filter bags is arranged above the air inlet, and the filter bags are fixedly connected to the shell. A cleaning device is located above each filter bag, with each filter bag corresponding to a cleaning device. An air outlet is located on one side of each cleaning device and is connected to a centrifugal fan. When the baghouse dust collector is in use, air containing dust enters through the inlet and flows vertically upwards along the filter bags under the action of the centrifugal fan. The filter bags filter the air, adsorbing the dust onto their surfaces. Clean air then flows inside the filter bags and finally exits through the outlet. After the baghouse dust collector has been operating for a period of time, the cleaning device blows out a high-pressure backflow to clean the filter bags, causing the dust to detach from the filter bag surface and fall into the dust hopper for collection.

[0004] However, during the dust removal process of the bag filter, the bag filter simultaneously intakes air for filtration. At this time, the dust blown off the filter bags by the dust removal device will be re-entrained by the incoming air and re-adhere to the filter bags, thus reducing the dust removal efficiency. At the same time, the intake of air in the bag filter will cause the dust in the ash hopper to be re-entrained, resulting in a reduction in purification efficiency.

[0005] In view of this, we propose a bag filter for collecting steel dust and a method for its secondary utilization. Summary of the Invention

[0006] The purpose of this invention is to provide a bag filter for collecting dust from steelmaking and a method for its secondary utilization, so as to solve the problem of poor purification caused by secondary re-entrainment of dust in the bag filter mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A baghouse dust collector for collecting steel dust includes: a baghouse dust collector body, a drive motor, a flow guiding assembly, a suction plate, a collection assembly, and a scraper. The baghouse dust collector body has a tube sheet and a baffle plate arranged from top to bottom. An air exchange port is opened on the baffle plate. The tube sheet and baffle plate divide the baghouse dust collector body into a clean air chamber, a filter chamber, and a dust collection chamber from top to bottom. Filter bags are installed in a grid array on the tube sheet. An air inlet is opened in the dust collection chamber, and an air outlet is opened in the clean air chamber. The air outlet is connected to a centrifugal fan. A dust removal device corresponding to each filter bag is provided in the clean air chamber. During use, the baghouse dust collector collects air containing steel dust. From the air inlet dust collection chamber, a small portion of the large dust particles fall into the dust collection chamber under gravity. The dust collection chamber is equipped with a discharge valve to transport the collected dust. Most of the dust is driven by the centrifugal fan to pass through the air exchange port on the baffle plate and enter the filter chamber to contact the filter bag. The dust is adsorbed on the filter bag. Then the filtered air enters the inside of the filter bag and flows into the clean air chamber, and finally is discharged. When the dust on the filter bag is compressed to a certain extent, the dust cleaning device blows air in reverse to clean the filter bag, blowing the dust off the filter bag and into the dust collection chamber. Finally, the dust is discharged from the dust collection chamber through the discharge valve for collection.

[0009] A drive motor is installed inside the baffle plate, and a flow guiding component is located below the drive motor. A suction plate is arrayed on the flow guiding component, and the suction plate is slidably installed with the baffle plate and corresponds to the filter bag. When the dust removal device is working, the drive motor drives the suction plate through the flow guiding component to slide and guide the dust into the dust collection chamber. The dust removal device blows air in reverse to blow the dust off the filter bag. At this time, the drive motor starts and drives the suction plate to slide vertically through the flow guiding component. The suction plate slides relative to the baffle plate, and the suction plate guides the airflow to flow vertically downwards. The airflow carries the blown-off dust into the dust collection chamber. A collection component is located below the flow guiding component, and a scraper is located below the collection component. The scraper is slidably installed in the dust collection chamber. When the dust removal device is working, the flow guiding component drives the scraper to slide back and forth through the collection component to collect the dust. When the flow guiding device is working, the collection component drives the reciprocating plate to slide and scrape the dust adhering to the inner wall of the dust collection chamber, causing it to fall into the ash discharge valve for collection, facilitating subsequent secondary use.

[0010] Preferably, the air exchange ports on the baffle plate are divided into fixed ports and intermittent ports. The fixed ports are located between two filter bags, and the intermittent ports correspond one-to-one with the filter bags. The fixed ports are frustum-shaped structures, and suction plates are slidably installed inside the intermittent ports. A drive motor is installed in the center of the baffle plate. The fixed ports are used to connect the dust collection chamber and the filter chamber, so that the air containing dust enters the filter chamber from the dust collection chamber through the fixed ports and is adsorbed by the filter bags. When the dust removal device blows the dust off the filter bags, since the intermittent ports are located below the filter bags, the dust blown off is located above the intermittent ports. At this time, the suction plate slides vertically downward along the baffle plate, thereby driving the air to flow downward. The dust blown off follows the suction plate from the intermittent ports into the dust collection chamber. At the same time, the suction plate drives the airflow to flow vertically downward, reducing the air resistance encountered by the dust removal device during dust removal, thereby enhancing the dust removal effect of the dust removal device and ensuring the cleanliness of the filter bags.

[0011] Preferably, the drainage assembly includes a drive shaft, a bushing, a reciprocating plate, a misalignment plate, a return spring, and drainage fan blades; the drive shaft is fixedly installed with a drive motor, the drive shaft has threads, and a bushing is slidably installed on the drive shaft; the bushing has a threaded groove that mates with the drive shaft, and there are retaining blocks on both sides of the bushing, with corresponding pressing grooves on the retaining blocks; the bushing is slidably installed in the reciprocating plate, and when the drive motor rotates, it drives the drive shaft to rotate synchronously; when the drive shaft rotates, it slides vertically downwards through the threaded connection to the drive bushing; the reciprocating plate... The reciprocating plate is slidably installed inside the bag filter body. The reciprocating plate is slidably installed on the drive shaft. The reciprocating plate has a dust collection port corresponding to the fixed port. A suction plate is fixedly installed on the reciprocating plate, located within the intermittent port. When the bushing slides vertically downwards, it drives the reciprocating plate to slide downwards synchronously. The reciprocating plate drives the suction plate fixedly connected to it to move synchronously. The suction plate slides vertically downwards along the intermittent port, drawing airflow vertically downwards, thereby causing the dust to move synchronously. The dust continues to flow downwards through the dust collection port. Simultaneously, the reciprocating... The plate prevents the airflow in the air inlet from blowing away the dust collected in the dust collection chamber, thus avoiding secondary re-entrainment. Two misaligned plates are slidably installed inside the reciprocating plate, connected to the reciprocating plate by a return spring. These two misaligned plates are symmetrically installed on both sides of the bushing. Each misaligned plate has a pressing groove that mates with a locking block. When the bushing slides vertically downwards, the pressing grooves push the misaligned plates to close, thus closing the dust collection port and ensuring the integrity of the reciprocating plate, thereby conveying the dust collected in the dust collection chamber. This allows the dust collected from the ash discharge valve to be discharged. The guide fan blade is rotatably mounted on the lower end of the reciprocating plate and is fixedly connected to the drive shaft. A drive groove is provided on the inner side of the guide fan blade. A drive block that cooperates with the drive groove is provided on the drive shaft. The drive block is located in the drive groove. When the drive shaft rotates, it drives the drive block to rotate synchronously. The drive block pushes the drive groove by squeezing, thereby driving the guide fan blade to rotate synchronously. The rotation of the guide fan blade draws in air, promoting the dust collected from the ash to follow the airflow through the dust collection port into the lower part of the ash collection chamber. At the same time, the guide fan blade moves synchronously with the reciprocating plate.

[0012] Preferably, the reciprocating plate consists of a fixed plate, a sliding plate, and a telescopic spring. The fixed plate has a grid array of dust collection ports, a suction plate is mounted on the fixed plate, and a sliding cavity is formed in the center of the fixed plate. A bushing is slidably installed in the sliding cavity, and the sliding cavity is connected to the misalignment plate via a return spring. Telescopic cavities are formed around the fixed plate, and the sliding plate is connected to the telescopic cavities via a telescopic spring. When the drive shaft drives the bushing to slide vertically downwards via a thread, the bushing slides vertically downwards along the sliding cavity. At this time, the bushing is not in contact with the lower end of the sliding cavity. The reciprocating plate maintains its fixation through the friction between the sliding plate and the bag filter body. When the bushing slides vertically downwards to the bottom of the sliding cavity, the bushing drives the fixed plate to move downwards synchronously. The fixed plate drives the sliding plate to slide vertically downwards along the inner wall of the dust collection chamber. Since the inner wall of the dust collection chamber is inclined, the inner wall of the dust collection chamber squeezes the sliding plate into the telescopic cavity. When the bushing drives the reciprocating plate to slide vertically upwards, the telescopic spring drives the sliding plate to return to its original position.

[0013] Preferably, the fixed plate is provided with diversion protrusions, which are prismatic structures tangent to the fixed opening. The height of the prismatic structure near the air inlet is less than that away from the air inlet. The diversion protrusions guide the airflow. When air containing dust flows in from the air inlet, the air contacts the diversion protrusions and flows vertically upward along the inclined surface of the prismatic structure of the diversion protrusions. It then enters the filter chamber through the fixed opening and contacts the filter bags for filtration. At the same time, the height of the prismatic structure increases gradually, thus preventing the diversion protrusions near the air inlet from affecting the airflow. This would result in less air flowing to the area away from the air inlet, causing the filter bags in the area away from the air inlet to not be fully utilized and to be cleaned by the dust removal device, leading to filter bag damage and affecting the normal use of the bag filter. In addition, the gradually increasing diversion protrusions reduce the distance between the air and the baffle plate, thereby increasing the air pressure and the airflow distance, ensuring uniform air distribution.

[0014] Preferably, the suction plate is divided into a horizontal section and a vertical section. The horizontal section has a convex arc surface, and the vertical section has a rectangular structure. The inclined surface of the rectangular structure connects with the prismatic structure. The convex arc surface structure of the suction plate enhances the suction effect of the suction plate on the air, thereby enhancing the guiding and collection effect of the dust. The inclined surface of the rectangular structure of the suction plate connects with the prismatic structure, thereby guiding the airflow to the diversion protrusion, promoting the uniform distribution of air, and ensuring the purification efficiency of the bag filter.

[0015] Preferably, the drive straight slot has a linear array of grooves that cooperate with the drive block. The grooves are used to increase the contact area between the drive block and the drive straight slot, thereby increasing the interaction force between the drive block and the drive straight slot, thus increasing the rotation efficiency of the guide fan blades, ensuring the air suction efficiency of the guide fan blades, and thus ensuring the dust collection efficiency.

[0016] Preferably, the collection assembly includes a rubber rod, an electrode rod, an active rod, a driven rod, and a fixing block; the rubber rods are arranged in a ring at the bottom of the fixing plate, and the electrode rods are located below the rubber rods; the electrode rods are fixedly installed on the inner wall of the dust collection chamber, and when the reciprocating plate slides downward, it drives the rubber rods to move synchronously. When the reciprocating plate stops moving, the reciprocating plate drives the rubber rods to contact the electrode rods to generate an electrostatic field. The electrostatic field adsorbs the dust in the dust collection chamber, causing the dust to adhere to the inner wall of the dust collection chamber, thereby preventing the dust from floating in the dust collection chamber and making it difficult to collect; the active rod is installed inside the rubber rods, and the active rod is connected to the fixing block. The plate is rotatably connected, and the other end of the active rod is rotatably connected to the driven rod; the driven rod is connected to the fixed block, and the fixed block is slidably installed on the inner wall of the dust collection chamber. A limit groove is opened on the dust collection chamber, and a limit block is provided on the fixed block, thereby realizing the sliding connection between the fixed block and the dust collection chamber; a scraper is rotatably installed on the fixed block. When the reciprocating plate slides vertically downward, the active plate pushes the active rod to move vertically downward. The active rod transmits the force to the driven rod, and the driven rod pushes the fixed block to slide along the inner wall of the dust collection chamber. The fixed block drives the scraper to move synchronously. The scraper cleans the dust adsorbed by the electrostatic field generated by the rubber rod and the electrode rod last time.

[0017] Preferably, the scraper is a folded plate, which is composed of two sub-plates rotatably connected. The two sub-plates are rotatably connected to each other and respectively rotatably connected to a fixed block. The inner wall of the ash collection chamber is provided with a reset block that cooperates with the sub-plates. When the scraper slides vertically downward along the inner wall of the ash collection chamber following the fixed block, the width of the inner wall of the ash collection chamber gradually decreases. At this time, the inner wall of the ash collection chamber squeezes the scraper, and the two sub-plates of the scraper rotate relative to each other and fit against the inner wall of the ash collection chamber. When the fixed block resets and slides upward, causing the scraper to move synchronously, the sub-plates come into contact with the reset plate, thereby causing the sub-plates to reverse and thus achieve reset.

[0018] A method for secondary utilization of steel dust includes the following steps:

[0019] S1. The dust removal device cleans the filter bags. At this time, the drive motor drives the suction plate to slide and guide the dust into the dust collection chamber through the diversion component.

[0020] The dust removal device blows air in reverse to blow the dust off the filter bags. At this time, the drive motor starts and drives the suction plate to slide vertically through the flow guiding component. The suction plate slides relative to the baffle plate, and the suction plate guides the airflow to flow vertically downward. The airflow carries the blown-off dust into the dust collection chamber.

[0021] S2. The diversion component collects dust by driving the scraper to slide back and forth through the collection component;

[0022] When the diversion device is working, the reciprocating plate driven by the collection component slides to scrape the dust adhering to the inner wall of the dust collection chamber, causing it to fall into the ash discharge valve for collection, which facilitates subsequent secondary use;

[0023] S3. The collected dust is processed through direct internal circulation, cold-forming pelletizing, rotary kiln, or rotary hearth furnace.

[0024] Cold-forming pelletizing: This is a process technology that involves adding a binder to dust collector ash and then pressing it into spherical materials using a roller pelletizing machine. It is suitable for processing low-zinc dust collector ash with a zinc content of less than 1%.

[0025] Direct in-plant recycling: This method involves recycling dust directly within the plant, typically used in processes such as sintering and ironmaking.

[0026] Rotary kiln processing: Dust collector ash is treated at high temperatures in a rotary kiln, transforming it into valuable products such as pulverized coal injected into blast furnaces.

[0027] Rotary hearth furnace processing: The rotary hearth furnace is used to pyrolyze and reduce dust to produce valuable metals or alloys.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] A baghouse dust collector for collecting steel dust and a method for its secondary utilization are disclosed. This invention improves the purification efficiency of the baghouse dust collector by using a diversion component and a collection component, thereby improving the collection efficiency of steel dust and facilitating its subsequent secondary utilization.

[0030] A baghouse dust collector for collecting dust from steelmaking and a method for its secondary utilization are disclosed. The invention reduces the resistance encountered by the dust removal device during dust removal by using a flow-guiding component, thereby enhancing the dust removal efficiency of the dust removal device on the filter bags. At the same time, it ensures uniform airflow within the baghouse dust collector, improving the purification quality.

[0031] A baghouse dust collector for collecting dust from steelmaking and a method for its secondary utilization are disclosed. The invention improves the dust collection efficiency in the dust collection chamber by using a collection component, and avoids the secondary re-entrainment of dust, which would reduce the purification efficiency. Attached Figure Description

[0032] Figure 1 This is a half-sectional schematic diagram of the main body of the bag filter of the present invention;

[0033] Figure 2 For the present invention Figure 1 A magnified view of point A;

[0034] Figure 3 This is a vertical sectional view of the bag filter of the present invention;

[0035] Figure 4 For the present invention Figure 3 A magnified view of point B;

[0036] Figure 5 For the present invention Figure 3 A magnified view of point C;

[0037] Figure 6 For the present invention Figure 3 A magnified view of point D;

[0038] Figure 7 This is an overall schematic diagram of the drainage component and the collection component of the present invention;

[0039] Figure 8 This is a half-sectional view of the drainage component and the collection component of the present invention;

[0040] Figure 9 For the present invention Figure 8 A magnified view of point E;

[0041] Figure 10 For the present invention Figure 8 A magnified view of point F;

[0042] Figure 11 This is a half-sectional schematic diagram of the drainage component of the present invention;

[0043] Figure 12 This is a half-sectional schematic diagram of the reciprocating plate of the present invention;

[0044] Figure 13 This is a half-sectional schematic diagram of the flow-guiding fan blade of the present invention;

[0045] Figure 14 This is an overall schematic diagram of the collection component of the present invention;

[0046] Figure 15 This is a schematic diagram of the overall scraper of the present invention.

[0047] In the picture:

[0048] 1. Baghouse dust collector body; 11. Tube sheet; 12. Baffle plate; 121. Air exchange port; 1211. Fixed port; 1212. Intermittent port; 13. Clean air chamber; 14. Filter chamber; 15. Dust collection chamber; 151. Reset block; 16. Filter bag; 17. Dust cleaning device;

[0049] 2. Drive motor;

[0050] 3. Drainage assembly; 31. Drive shaft; 311. Drive block; 32. Bushing; 321. Clamping block; 3211. Extrusion groove; 33. Reciprocating plate; 331. Fixing plate; 3311. Ash collection port; 3312. Sliding cavity; 3313. Telescopic cavity; 3314. Diverting protrusion; 3315. Prism-shaped structure; 332. Sliding plate; 333. Telescopic spring; 34. Misalignment plate; 35. Return spring; 36. Drainage fan blade; 361. Drive straight groove; 3611. Groove;

[0051] 4. Suction plate; 41. Horizontal section; 411. Convex arc surface; 42. Vertical section; 421. Rectangular structure;

[0052] 5. Collection component; 51. Rubber rod; 52. Electrode rod; 53. Driving rod; 54. Driven rod; 55. Fixing block;

[0053] 6. Scraper; 61. Sub-scraper. Detailed Implementation

[0054] 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.

[0055] A baghouse dust collector mainly consists of a shell, filter bags, and a cleaning device. The lower end of the shell is a dust hopper, and an air inlet is located above the hopper. A grid array of filter bags is arranged above the air inlet, and the filter bags are fixedly connected to the shell. A cleaning device is located above each filter bag, with each filter bag corresponding to a cleaning device. An air outlet is located on one side of each cleaning device and is connected to a centrifugal fan. When the baghouse dust collector is in use, air containing dust enters through the inlet and flows vertically upwards along the filter bags under the action of the centrifugal fan. The filter bags filter the air, adsorbing the dust onto their surfaces. Clean air then flows inside the filter bags and finally exits through the outlet. After the baghouse dust collector has been operating for a period of time, the cleaning device blows out a high-pressure backflow to clean the filter bags, causing the dust to detach from the filter bag surface and fall into the dust hopper for collection.

[0056] However, during the dust removal process of the bag filter, the bag filter simultaneously intakes air for filtration. At this time, the dust blown off the filter bags by the dust removal device will be re-entrained by the incoming air and re-adhere to the filter bags, thus reducing the dust removal efficiency. At the same time, the intake of air in the bag filter will cause the dust in the ash hopper to be re-entrained, resulting in a reduction in purification efficiency.

[0057] The present invention provides a technical solution:

[0058] like Figures 1 to 15 As shown, a baghouse dust collector for collecting steel dust includes: a baghouse dust collector body 1, a drive motor 2, a flow guiding assembly 3, a suction plate 4, a collection assembly 5, and a scraper 6. The baghouse dust collector body 1 has a tube sheet 11 and a baffle plate 12 arranged from top to bottom. The baffle plate 12 has an air exchange port 121. The tube sheet 11 and the baffle plate 12 divide the baghouse dust collector body 1 into a clean air chamber 13, a filter chamber 14, and a dust collection chamber 15 from top to bottom. Filter bags 16 are installed in a grid array on the tube sheet 11. The dust collection chamber 15 has an air inlet, and the clean air chamber 13 has an air outlet. The clean air chamber 13 has a cleaning unit corresponding to each filter bag 16. Device 17; A drive motor 2 is installed inside the baffle plate 12, and a flow guiding component 3 is provided below the drive motor 2. A suction plate 4 is arrayed on the flow guiding component 3. The suction plate 4 is slidably installed with the baffle plate 12 and corresponds to the filter bag 16. When the dust removal device 17 is working, the drive motor 2 drives the suction plate 4 through the flow guiding component 3 to slide and guide the dust into the dust collection chamber 15. A collection component 5 is provided below the flow guiding component 3, and a scraper 6 is provided below the collection component 5. The scraper 6 is slidably installed in the dust collection chamber 15. When the dust removal device 17 is working, the flow guiding component 3 drives the scraper 6 to reciprocate and slide to collect the dust through the collection component 5.

[0059] Specifically, the bag filter body 1 is provided with a tube sheet 11 and a baffle plate 12 from top to bottom. The baffle plate 12 has an air exchange port 121. The tube sheet 11 and the baffle plate 12 divide the bag filter body 1 into a clean air chamber 13, a filter chamber 14 and a dust collection chamber 15 from top to bottom. Filter bags 16 are installed in a grid array on the tube sheet 11. An air inlet is provided in the dust collection chamber 15 and an air outlet is provided in the clean air chamber 13. The air outlet is connected to a centrifugal fan. The clean air chamber 13 is provided with a dust removal device 17 corresponding to each filter bag 16. When the bag filter is in use, the air containing steel dust enters the dust collection chamber 15 through the air inlet, and then a small portion of the large dust particles fall under the action of gravity. The dust is fed into the dust collection chamber 15, which is equipped with a ash discharge valve to transport the collected dust. Most of the dust is transported into the filter chamber 14 by the centrifugal fan through the air exchange port 121 on the baffle plate 12 and comes into contact with the filter bag 16. The dust is adsorbed on the filter bag 16. Then the filtered air enters the inside of the filter bag 16 and flows into the clean air chamber 13 from the inside of the filter bag 16, and finally is discharged. When the dust on the filter bag 16 is compressed to a certain extent, the dust removal device 17 blows air in reverse to clean the filter bag 16, blowing the dust off the filter bag 16 and into the dust collection chamber 15. Finally, it is discharged and collected by the ash discharge valve in the dust collection chamber 15.

[0060] A drive motor 2 is installed inside the baffle plate 12. Below the drive motor 2 is a flow guide assembly 3, on which suction plates 4 are arrayed. The suction plates 4 are slidably installed with the baffle plate 12 and correspond to the filter bags 16. When the dust removal device 17 is working, the drive motor 2 drives the suction plates 4 through the flow guide assembly 3 to slide and guide the dust into the dust collection chamber 15. The dust removal device 17 blows air in reverse to blow the dust off the filter bags 16. At this time, the drive motor 2 starts and drives the suction plates 4 to slide vertically through the flow guide assembly 3. The suction plates 4 slide relative to the baffle plate 12. 4. The airflow is directed to flow vertically downwards, and the airflow carries the blown-off dust into the dust collection chamber 15. Below the flow-guiding component 3 is a collection component 5, and below the collection component 5 is a scraper 6. The scraper 6 is slidably installed in the dust collection chamber 15. When the dust removal device 17 is working, the flow-guiding component 3 drives the scraper 6 to slide back and forth through the collection component 5 to collect the dust. When the flow-guiding device is working, the collection component 5 drives the reciprocating plate 33 to slide and scrape the dust adhering to the inner wall of the dust collection chamber 15, causing it to fall into the ash discharge valve for collection, which is convenient for subsequent secondary use.

[0061] Preferably, the dust removal device 17 is an existing device that mainly adopts a pulse dust removal device 17, which mainly consists of a pulse valve, a venturi tube and a blow pipe. The pulse valve delivers compressed gas to the blow pipe, and then the gas is sprayed out through the venturi tube corresponding to the filter bag 16 to clean the filter bag 16.

[0062] In this embodiment, the air exchange port 121 opened on the baffle plate 12 is divided into a fixed port 1211 and an intermittent port 1212. The fixed port 1211 is located between two filter bags 16, and the intermittent port 1212 corresponds one-to-one with the filter bags 16. The fixed port 1211 has a frustum-shaped structure. A suction plate 4 is slidably installed in the intermittent port 1212. A drive motor 2 is installed in the center of the baffle plate 12.

[0063] Specifically, the fixed port 1211 is used to connect the dust collection chamber 15 and the filter chamber 14, so that the air containing dust enters the filter chamber 14 from the dust collection chamber 15 through the fixed port 1211 and is adsorbed by the filter bag 16. When the dust removal device 17 blows the dust off the filter bag 16, since the intermittent port 1212 is located below the filter bag 16, the dust blown off is located above the intermittent port 1212. At this time, the suction plate 4 slides vertically downward along the baffle plate 12, thereby driving the air to flow downward. The dust blown off follows the suction plate 4 from the intermittent port 1212 into the dust collection chamber 15. At the same time, the suction plate 4 drives the airflow to flow vertically downward, reducing the air resistance encountered by the dust removal device 17 during dust removal, thereby enhancing the dust removal effect of the dust removal device 17 and ensuring the cleanliness of the filter bag 16.

[0064] In this embodiment, the diversion assembly 3 includes a drive shaft 31, a bushing 32, a reciprocating plate 33, a misalignment plate 34, a return spring 35, and a diversion fan blade 36. The drive shaft 31 is fixedly installed with the drive motor 2. The drive shaft 31 has a thread, and the bushing 32 is slidably installed on the drive shaft 31. The bushing 32 has a threaded groove that mates with the drive shaft 31. The bushing 32 has locking blocks 321 on both sides, and the locking blocks 321 have corresponding compression grooves 3211. The bushing 32 is slidably installed inside the reciprocating plate 33. The reciprocating plate 33 is slidably installed inside the bag filter body 1 and is slidably installed on the drive shaft 31. The reciprocating plate 33 has a fixing port 12. The ash collection port 3311 corresponding to 11 is provided. A suction plate 4 is fixedly installed on the reciprocating plate 33. The suction plate 4 is located inside the intermittent port 1212. A misalignment plate 34 is slidably installed inside the reciprocating plate 33. There are two misalignment plates 34. The two misalignment plates 34 are connected to the reciprocating plate 33 by a return spring 35. The two misalignment plates 34 are symmetrically installed on both sides of the bushing 32. The misalignment plates 34 are provided with a squeezing groove 3211 that cooperates with the locking block 321. The guide fan blade 36 is rotatably installed at the lower end of the reciprocating plate 33 and is fixedly connected to the drive shaft 31. A drive straight groove 361 is provided on the inner side of the guide fan blade 36. A drive block 311 that cooperates with the drive straight groove 361 is provided on the drive shaft 31.

[0065] Specifically, the drive shaft 31 is fixedly installed with the drive motor 2. The drive shaft 31 has threads, and a bushing 32 is slidably installed on it. The bushing 32 has a threaded groove that mates with the drive shaft 31. Clamping blocks 321 are located on both sides of the bushing 32, and corresponding pressing grooves 3211 are provided on the clamping blocks 321. The bushing 32 is slidably installed inside the reciprocating plate 33. When the drive motor 2 rotates, it drives the drive shaft 31 to rotate synchronously. When the drive shaft 31 rotates, it slides vertically downwards through the threaded connection to the bushing 31. The reciprocating plate 33 is slidably installed inside the bag filter body 1, and is slidably installed on the drive shaft 31. The reciprocating plate 33 has a dust collection port 3311 corresponding to the fixed port 1211. A suction plate 4 is fixedly installed on the reciprocating plate 33, located inside the intermittent port 1212. When the bushing 32 slides vertically downward, it drives the reciprocating plate 33 to slide downward synchronously. The reciprocating plate 33 drives the suction plate 4 fixedly connected to it to move synchronously. The suction plate 4 slides vertically downward along the intermittent port 1212, and the suction plate 4 pulls the airflow vertically downward, thereby driving the dust to move synchronously. The dust continues to flow downward through the dust collection port. At the same time, the reciprocating plate 33 prevents the air flowing in the air inlet from affecting the dust collected in the dust collection chamber 15. Dust collectors cause the dust to be blown around, leading to secondary re-entrainment. Two misaligned plates 34 are slidably installed inside the reciprocating plate 33. These two misaligned plates 34 are connected to the reciprocating plate 33 via a return spring 35. The two misaligned plates 34 are symmetrically installed on both sides of the bushing 32. Each misaligned plate 34 has a pressing groove 3211 that cooperates with the locking block 321. When the bushing 32 slides vertically downwards, the pressing groove 3211 pushes the misaligned plates 34 to close, thus closing the dust collection port and ensuring the integrity of the reciprocating plate 33. This allows the dust collector in the dust collection chamber 15 to be transported and discharged from the ash discharge valve. The guide fan blades 36... The fan blade 36 is rotatably mounted on the lower end of the reciprocating plate 33 and fixedly connected to the drive shaft 31. A drive groove 361 is provided on the inner side of the fan blade 36. A drive block 311 is provided on the drive shaft 31 to cooperate with the drive groove 361. The drive block 311 is located in the drive groove 361. When the drive shaft 31 rotates, it drives the drive block 311 to rotate synchronously. The drive block 311 pushes the drive groove 361 by squeezing, thereby driving the fan blade 36 to rotate synchronously. The fan blade 36 rotates to draw in air, promoting the dust to follow the airflow and enter the dust collection chamber 15 below through the dust collection port. At the same time, the fan blade 36 moves synchronously with the reciprocating plate 33.

[0066] In this embodiment, the reciprocating plate 33 is composed of a fixed plate 331, a sliding plate 332, and a telescopic spring 333; the fixed plate 331 has a grid array of dust collection ports 3311, a suction plate 4 is installed on the fixed plate 331, a sliding cavity 3312 is opened in the center of the fixed plate 331, a bushing 32 is slidably installed in the sliding cavity 3312, and the sliding cavity 3312 is connected to the misalignment plate 34 through a return spring 35; telescopic cavities 3313 are opened around the fixed plate 331, and the sliding plate 332 is connected to the telescopic cavity 3313 through a telescopic spring 333;

[0067] Specifically, when the drive shaft 31 slides vertically downward through the threaded drive shaft 31 sleeve, the bushing 32 slides vertically downward along the sliding cavity 3312. At this time, the bushing 32 is not in contact with the lower end of the sliding cavity 3312. At this time, the reciprocating plate 33 is fixed by the friction between the sliding plate 332 and the bag filter body 1. When the bushing 32 slides vertically downward to the bottom of the sliding cavity 3312, the bushing 32 drives the fixed plate 331 to move downward synchronously. The fixed plate 331 drives the sliding plate 332 to slide vertically downward along the inner wall of the dust collection chamber 15. Since the inner wall of the dust collection chamber 15 is inclined, the inner wall of the dust collection chamber 15 squeezes the sliding plate 332 into the telescopic cavity 3313. When the bushing 32 drives the reciprocating plate 33 to slide vertically upward, the telescopic spring 333 drives the sliding plate 332 to return to its original position.

[0068] Preferably, when the bushing 32 slides vertically downward along the sliding cavity 3312, the bushing 32 pushes the misaligned plate 34 to slide horizontally through the extrusion groove 3211 to seal the dust collection port. When the bushing 32 completely seals the dust collection port by extruding the misaligned plate 34, the bushing 32 moves to the bottom of the sliding cavity 3312, thereby causing the bushing 32 to drive the reciprocating plate 33 to slide downward synchronously. At this time, the reciprocating plate 33 is completely sealed, and the reciprocating plate 33 continues to slide downward to transport the floating dust. When the bushing 32 resets, the bushing 32 no longer extrudes the misaligned plate 34 through the extrusion groove 3211, and the misaligned plate 34 gradually resets under the action of the reset spring 35. When the bushing 32 moves to the top of the sliding cavity 3312, the misaligned plate 34 opens the dust collection port. At this time, the bushing 32 drives the reciprocating plate 33 to slide vertically upward, and the distance between the reciprocating plate 33 and the baffle plate 12 decreases, thereby compressing air from the dust collection port into the dust collection chamber 15.

[0069] In this embodiment, the fixing plate 331 is provided with a diversion protrusion 3314, the diversion protrusion 3314 is a prismatic structure 3315, the prismatic structure 3315 is tangent to the fixing port 1211, and the height of the prismatic structure 3315 at the end near the air inlet is less than the height at the end away from the air inlet.

[0070] Specifically, the diversion protrusion 3314 is used to guide the airflow. When air containing dust flows in from the inlet, the air contacts the diversion protrusion 3314 and flows vertically upward along the inclined surface of the prismatic structure 3315 of the diversion protrusion 3314. It then enters the filter chamber 14 through the fixed opening 1211 and contacts the filter bag 16 for filtration. At the same time, the height of the prismatic structure 3315 increases step by step, thereby avoiding the diversion protrusion 3314 near the inlet from affecting the airflow. This would result in less air flowing to the area away from the inlet, which would cause the filter bag 16 in the area away from the inlet to not be fully used. It would then be cleaned by the dust removal device 17, which would damage the filter bag 16 and affect the normal use of the bag filter. At the same time, the step-by-step increase in the diversion protrusion 3314 reduces the distance between the air and the baffle plate 12, thereby increasing the air pressure and the airflow distance, and ensuring the uniform distribution of air.

[0071] In this embodiment, the suction plate 4 is divided into a horizontal section 41 and a vertical section 42. The horizontal section 41 is provided with a convex arc surface 411, and the vertical section 42 is a rectangular structure 421. The inclined surface of the rectangular structure 421 is connected to the prism structure 3315.

[0072] Specifically, the convex arc surface 411 structure of the suction plate 4 enhances the suction effect of the suction plate 4 on the air, thereby enhancing the guiding and collection effect of the dust. The inclined surface of the rectangular structure 421 of the suction plate 4 is connected to the prismatic structure 3315, thereby guiding the airflow to the diversion protrusion 3314, promoting the uniform distribution of air, and ensuring the purification efficiency of the bag filter.

[0073] In this embodiment, the driving straight groove 361 has a linear array of grooves 3611 that cooperate with the driving block 311;

[0074] Specifically, the groove 3611 is used to increase the contact area between the drive block 311 and the drive straight groove 361, thereby increasing the interaction force between the drive block 311 and the drive straight groove 361, thus increasing the rotation efficiency of the guide fan blade 36, ensuring the air suction efficiency of the guide fan blade 36, and thus ensuring the dust collection efficiency.

[0075] In this embodiment, the collection component 5 includes a rubber rod 51, an electrode rod 52, an active rod 53, a driven rod 54, and a fixing block 55. The rubber rods 51 are arranged in a ring at the bottom of the fixing plate 331, and the electrode rods 52 are provided below the rubber rods 51. The electrode rods 52 are fixedly installed on the inner wall of the ash collection chamber 15. The active rod 53 is installed inside the rubber rods 51 and is rotatably connected to the fixing plate 331. The other end of the active rod 53 is rotatably connected to the driven rod 54. The driven rod 54 is connected to the fixing block 55. The fixing block 55 is slidably installed on the inner wall of the ash collection chamber 15, and a scraper 6 is rotatably installed on the fixing block 55.

[0076] Specifically, rubber rods 51 are arranged in a ring at the bottom of the fixed plate 331, and electrode rods 52 are provided below the rubber rods 51. The electrode rods 52 are fixedly installed on the inner wall of the dust collection chamber 15. When the reciprocating plate 33 slides downward, it drives the rubber rods 51 to move synchronously. When the reciprocating plate 33 stops moving, the reciprocating plate 33 drives the rubber rods 51 to contact the electrode rods 52 to generate an electrostatic field. The electrostatic field adsorbs the dust in the dust collection chamber 15, causing the dust to adhere to the inner wall of the dust collection chamber 15, thereby preventing the dust from floating in the dust collection chamber 15 and making it difficult to collect. The active rod 53 is installed inside the rubber rods 51 and is rotatably connected to the fixed plate 331. The other end of the active rod 53 is connected to the driven rod. 54 is rotatably connected; the driven rod 54 is connected to the fixed block 55, the fixed block 55 is slidably installed on the inner wall of the dust collection chamber 15, the dust collection chamber 15 is provided with a limit groove, and the fixed block 55 is provided with a limit block, thereby realizing the sliding connection between the fixed block 55 and the dust collection chamber 15; a scraper 6 is rotatably installed on the fixed block 55. When the reciprocating plate 33 slides vertically downward, the active plate pushes the active rod 53 to move vertically downward. The active rod 53 transmits the force to the driven rod 54, and the driven rod 54 pushes the fixed block 55 to slide along the inner wall of the dust collection chamber 15. The fixed block 55 drives the scraper 6 to move synchronously. The scraper 6 cleans the dust adsorbed by the electrostatic field generated by the rubber rod 51 and the electrode rod 52 last time.

[0077] In this embodiment, the scraper 6 is a folded plate, and the scraper 6 is composed of two sub-plates 61 rotatably connected. The two sub-plates 61 are rotatably connected to each other and respectively rotatably connected to the fixing block 55. The inner wall of the dust collection chamber 15 is provided with a reset block 151 that cooperates with the sub-plates 61.

[0078] Specifically, as the scraper 6 slides vertically downward along the inner wall of the dust collection chamber 15 following the fixing block 55, the width of the inner wall of the dust collection chamber 15 gradually decreases. At this time, the inner wall of the dust collection chamber 15 presses against the scraper 6, and the two sub-plates 61 of the scraper 6 rotate relative to each other and fit against the inner wall of the dust collection chamber 15. When the fixing block 55 resets and slides upward, causing the scraper 6 to move synchronously, the sub-plates 61 come into contact with the reset plate, thereby causing the sub-plates 61 to reverse and thus achieve reset.

[0079] In the present invention, a bag filter for collecting dust from steel dust and a method for secondary utilization are used. When the dust removal device 17 back-blowing cleans the filter bag 16, the drive motor 2 rotates forward, driving the drive shaft 31 to rotate synchronously. The drive shaft 31 slides vertically downward through the threaded drive shaft 31 sleeve. The sleeve 32 first pushes the misaligned plate 34 to close the dust collection port through the extrusion groove 3211. The sleeve 32 continues to slide downward, thereby driving the reciprocating plate 33 to move synchronously downward. At the same time, the drive shaft 31 drives the guide fan blade 36 to rotate, drawing in air. When the reciprocating plate 33 moves vertically downward, it drives the rubber rod 51 to move synchronously downward. The rubber rod 51 contacts the electrode rod 52 to generate an electrostatic field to adsorb dust. At the same time, the reciprocating plate 33 drives the active rod 53 to move vertically downward. The active rod 53 pushes the driven rod 54, and the driven rod 54 pushes the fixed block 55 to move synchronously. The fixed block 55 drives the scraper 6 to scrape the inner wall of the dust collection chamber 15.

[0080] After the dust removal is completed, the drive motor 2 flips over, and the drive motor 2 drives the drive shaft 31 to reverse. The drive shaft 31 drives the bushing 32 to slide vertically upward. The bushing 32 no longer presses against the misaligned plate 34. The misaligned plate 34 is reset under the action of the reset spring 35. The bushing 32 continues to move up and down, driving the reciprocating plate 33 to move synchronously. The reciprocating plate 33 drives the rubber rod 51 to separate from the electrode rod 52, and the electrostatic field disappears. At the same time, the reciprocating plate 33 drives the active rod 53 to reset. The active rod 53 pulls the driven rod 54 to reset. The driven rod 54 drives the fixed block 55 to reset. The fixed block 55 pulls the scraper 6 to reset.

[0081] 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 preferred examples and are not intended to limit 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 present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A baghouse dust collector for collecting dust from steel mills, characterized in that, include: The bag filter body (1), drive motor (2), flow diversion assembly (3), suction plate (4), collection assembly (5) and scraper (6); The bag filter body (1) is provided with a tube sheet (11) and a baffle plate (12) from top to bottom. The baffle plate (12) is provided with an air exchange port (121). The tube sheet (11) and the baffle plate (12) divide the bag filter body (1) into a clean air chamber (13), a filter chamber (14) and a dust collection chamber (15) from top to bottom. Filter bags (16) are installed in a grid array on the tube sheet (11). An air inlet is provided in the dust collection chamber (15). An air outlet is provided in the clean air chamber (13). A dust removal device (17) corresponding to each filter bag (16) is provided in the clean air chamber (13). The air exchange port (121) opened on the baffle plate (12) is divided into a fixed port (1211) and an intermittent port (1212). The fixed port (1211) is located between two filter bags (16), and the intermittent port (1212) corresponds one-to-one with the filter bag (16). The fixed port (1211) has a frustum-shaped structure. A suction plate (4) is slidably installed in the intermittent port (1212). A drive motor (2) is installed in the center of the baffle plate (12). The drive motor (2) is provided with a flow guiding component (3) below it. The flow guiding component (3) is arrayed with suction plates (4). The suction plates (4) are slidably installed with the baffle plate (12) and correspond to the filter bag (16). When the dust removal device (17) is working, the drive motor (2) drives the suction plates (4) through the flow guiding component (3) to slide and guide the dust into the dust collection chamber (15). The drainage assembly (3) includes a drive shaft (31), a bushing (32), a reciprocating plate (33), a misalignment plate (34), a return spring (35), and drainage fan blades (36). The drive shaft (31) is fixedly installed with the drive motor (2), the drive shaft (31) is threaded, and the drive shaft (31) is slidably installed with a bushing (32). The bushing (32) has a threaded groove that mates with the drive shaft (31). The bushing (32) has a locking block (321) on both sides. The locking block (321) has a corresponding pressing groove (3211). The bushing (32) is slidably installed in the reciprocating plate (33). The reciprocating plate (33) is slidably installed inside the bag filter body (1). The reciprocating plate (33) is slidably installed on the drive shaft (31). The reciprocating plate (33) has a dust collection port (3311) corresponding to the fixed port (1211). A suction plate (4) is fixedly installed on the reciprocating plate (33). The suction plate (4) is located inside the intermittent port (1212). A misalignment plate (34) is slidably installed inside the reciprocating plate (33). There are two misaligned plates (34). The two misaligned plates (34) are connected to the reciprocating plate (33) by a reset spring (35). The two misaligned plates (34) are symmetrically installed on both sides of the bushing (32). The misaligned plates (34) are provided with a pressing groove (3211) that cooperates with the locking block (321). The flow fan blade (36) is rotatably mounted on the lower end of the reciprocating plate (33) and fixedly connected to the drive shaft (31); a drive straight groove (361) is provided on the inner side of the flow fan blade (36), and a drive block (311) that cooperates with the drive straight groove (361) is provided on the drive shaft (31). Below the diversion component (3) is a collection component (5), and below the collection component (5) is a scraper (6). The scraper (6) is slidably installed in the dust collection chamber (15). When the dust removal device (17) is working, the diversion component (3) drives the scraper (6) to slide back and forth through the collection component (5) to collect the dust.

2. The bag filter according to claim 1, characterized in that: The reciprocating plate (33) is composed of a fixed plate (331), a sliding plate (332), and a telescopic spring (333); The fixed plate (331) has a grid array with dust collection ports (3311), and a suction plate (4) is installed on the fixed plate (331). A sliding cavity (3312) is opened in the center of the fixed plate (331), and a bushing (32) is slidably installed in the sliding cavity (3312). The sliding cavity (3312) is connected to the misalignment plate (34) through a return spring (35). The fixed plate (331) has telescopic cavities (3313) around its perimeter, and the sliding plate (332) is connected to the telescopic cavities (3313) by a telescopic spring (333).

3. The bag filter according to claim 2, characterized in that: The fixed plate (331) is provided with a diversion protrusion (3314), the diversion protrusion (3314) is a prismatic structure (3315), the prismatic structure (3315) is tangent to the fixed port (1211), and the height of the prismatic structure (3315) near the air inlet is less than the height of the end away from the air inlet.

4. The bag filter according to claim 3, characterized in that: The suction plate (4) is divided into a horizontal section (41) and a vertical section (42). The horizontal section (41) has a convex arc surface (411), and the vertical section (42) is a rectangular structure (421). The inclined surface of the rectangular structure (421) is connected to the prism structure (3315).

5. The bag filter according to claim 1, characterized in that: The drive straight groove (361) has a linear array of grooves (3611) that cooperate with the drive block (311).

6. The bag filter according to claim 2, characterized in that: The collecting component (5) includes a rubber rod (51), an electrode rod (52), an active rod (53), a driven rod (54), and a fixing block (55). The rubber rods (51) are arranged in a ring at the bottom of the fixing plate (331), and an electrode rod (52) is provided below the rubber rods (51). The electrode rod (52) is fixedly installed on the inner wall of the ash collection chamber (15); The active rod (53) is installed inside the rubber rod (51), the active rod (53) is rotatably connected to the fixed plate (331), and the other end of the active rod (53) is rotatably connected to the driven rod (54); The driven rod (54) is connected to the fixed block (55); The fixing block (55) is slidably installed on the inner wall of the ash collection chamber (15), and a scraper (6) is rotatably installed on the fixing block (55).

7. The bag filter according to claim 6, characterized in that: The scraper (6) is a folded plate. The scraper (6) is composed of two sub-plates (61) rotatably connected. The two sub-plates (61) are rotatably connected to each other and rotatably connected to the fixing block (55). The inner wall of the dust collection chamber (15) is provided with a reset block (151) that cooperates with the sub-plates (61).

8. A method for secondary utilization of steel dust, wherein the dust is collected by a bag filter as described in any one of claims 1-7, characterized in that: Includes the following steps: S1. The dust removal device (17) cleans the filter bag (16). At this time, the drive motor (2) drives the suction plate (4) through the diversion component (3) to slide and guide the dust into the dust collection chamber (15). S2, The diversion component (3) collects dust by driving the scraper (6) to slide back and forth through the collection component (5); S3. The collected dust is processed through direct internal circulation, cold-forming pelletizing, rotary kiln or rotary hearth furnace.

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