Flue gas dust removal device

Abstract

A flue gas dust removal device comprises a filter box and a mounting plate arranged in the filter box, a filter assembly for filtering flue gas is detachably arranged on the mounting plate, and a dust removal assembly for cleaning the filter assembly and a pulse device are arranged on the filter box. The dust removal assembly comprises a fixing ring group detachably arranged on the bottom surface of the mounting plate, each fixing ring of the fixing ring group is arranged corresponding to the through hole of the mounting plate, a mounting ring is rotationally arranged in the fixing ring, hanging rods are distributed on the bottom surface of the mounting ring around the axis of the mounting ring, and a spiral shovel sleeving the filter bag is arranged below the mounting ring; and the spiral shovel is connected with the mounting ring through a suspender. By arranging the dust removal assembly, dust adsorbed on the outer surface of the cloth bag can be cleaned while the cloth bag treats flue gas, and meanwhile, the dust removal assembly can clean the dust on the cloth bag downwards, so that the dust blown away during pulse injection is prevented from being adsorbed on the cloth bag again.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas treatment, and in particular relates to a flue gas dust removal device. Background Technology

[0002] Blast furnace flue gas dust removal refers to the dust removal treatment of flue gas generated during blast furnace production to remove particulate matter, dust, and other pollutants. Baghouse dust collectors, as one method of flue gas dust removal, work by trapping dust on the outside of the filter bags as the dust-laden flue gas passes through them, while the purified flue gas passes through the inside of the bags and is then discharged through the exhaust channel. To ensure the continuous and effective operation of the filter bags, the dust on the filter bags needs to be cleaned regularly. Pulse jet cleaning is a common method for cleaning filter bags, using high-pressure gas to instantly blow dust off the bags. However, pulse jet cleaning only occurs after dust has accumulated on the bags, causing dust to slowly accumulate and reducing the filter bag's efficiency in filtering flue gas, preventing the bag from continuously operating at a high efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a flue gas dust removal device to solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, the specific technical solution of the flue gas dust removal device of this utility model is as follows:

[0005] A flue gas dust removal device includes a filter box, a mounting plate disposed within the filter box, and a filter assembly for filtering flue gas detachably mounted on the mounting plate. A dust removal assembly and a pulse device for cleaning the filter assembly are located on the filter box. The filter box includes a housing, a cover plate detachably mounted on the top surface of the housing, a discharge channel communicating with the bottom surface of the housing, and a flue gas inlet channel and a flue gas outlet channel communicating with the side walls of the housing. A dust removal device is provided on the discharge channel. The mounting plate has evenly spaced through holes, and a filter assembly is detachably mounted within each through hole. The filter assembly includes a support ring detachably mounted on the mounting plate via a connector, a bracket mounted on the support ring, and a filter bag, with the filter bag fitted over the bracket. The dust removal assembly includes a set of fixed rings detachably mounted on the bottom surface of the mounting plate, with each fixed ring corresponding to a through hole in the mounting plate. A mounting ring is rotatably mounted within the fixed rings. A hanger rod is distributed around the axis of the mounting ring on its bottom surface, and a spiral shovel fitted over the filter bag is located below the mounting ring. The spiral shovel is connected to the mounting ring via the hanger rod. A drive unit that drives the mounting ring to rotate is located on the cover plate.

[0006] Furthermore, the pulse device includes an air bag mounted on the side wall of the housing via a support plate, a blow pipe located inside the housing, one end of the blow pipe penetrating the housing and connected to the air bag, and a nozzle connected to the portion located inside the blow pipe.

[0007] Furthermore, the spiral shovel is provided with bristles evenly spaced along its inner spiral wall, and the bristles cooperate with the filter bag.

[0008] Furthermore, the drive unit includes a second motor mounted on the cover plate. The output end of the second motor has a second rotating shaft that passes through the cover plate and the mounting plate and is rotatably mounted to both the cover plate and the mounting plate. The second rotating shaft is connected to the mounting rings via a transmission unit. The transmission unit includes a second sprocket located at the bottom end of the rotating shaft and first sprockets located on each mounting ring. The first sprockets on each fixed ring group are connected by a chain. The second sprockets are located outside the chain and mesh with the chain.

[0009] Furthermore, support shafts are distributed on one side of the chain on the mounting plate, each support shaft is located between adjacent first sprockets, and a third sprocket is rotatably mounted on the bottom surface of the support shaft, the third sprocket meshing with its corresponding chain.

[0010] Furthermore, the bottom surface of the box is connected to an ash hopper, and a discharge channel is located below the ash hopper. The discharge device includes a first rotating shaft that is rotatably located inside the discharge channel, a first motor located on the outer wall of the discharge channel, the first motor being connected to the first rotating shaft, and flaps adapted to the discharge channel being distributed circumferentially around the first rotating shaft.

[0011] The flue gas dust removal device of this utility model has the following advantages:

[0012] This invention, by incorporating a dust removal component, can clean the dust adsorbed on the outer surface of the filter bag while it treats the flue gas. At the same time, the dust removal component will also clean the dust on the filter bag downwards, thereby preventing the dust blown off during pulse jet cleaning from being re-adsorbed onto the filter bag. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a flue gas dust removal device according to the present invention;

[0014] Figure 2 This is a schematic diagram of the pulse device structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the transmission part of this utility model;

[0016] Figure 4 This is a schematic diagram of the dust removal component of this utility model;

[0017] Figure 5 This is a schematic diagram of the ash removal device of this utility model.

[0018] Explanation of markings in the diagram:

[0019] 1. Housing; 2. Support legs; 3. Ash hopper; 4. Discharge channel; 5. Ash discharge device; 51. First rotating shaft; 52. First motor; 53. Flip plate; 6. Smoke inlet channel; 7. Smoke outlet channel; 8. Mounting plate; 9. Filter assembly; 91. Support ring; 92. Bracket; 93. Filter bag; 10. Dust removal assembly; 101. Fixing ring; 102. Mounting ring; 103. Hanging rod; 104. Spiral shovel; 11. First sprocket; 12. Chain; 13. Second sprocket; 14. Second rotating shaft; 15. Second motor; 16. Cover plate; 17. Brush bristles; 18. Support plate; 19. Air tank; 20. Blowpipe; 21. Nozzle; 22. Support shaft; 23. Third sprocket. Detailed Implementation

[0020] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a flue gas dust removal device according to this utility model.

[0021] like Figures 1 to 5 As shown, this utility model discloses a flue gas dust removal device, including a filter box supported by legs 2, a mounting plate 8 disposed within the filter box, and a detachable filter assembly 9 for filtering flue gas on the mounting plate 8. A dust removal assembly 10 and a pulse device are located on the filter box for cleaning the filter assembly 9. The filter assembly 9 within the filter box can remove dust from the flue gas, while the dust removal assembly 10 and the pulse device can clean the dust adsorbed on the filter assembly 9. This allows the filter assembly 9 to filter the flue gas more efficiently, reducing air pollution from the flue gas.

[0022] Specifically, the filter box includes a box body 1, which is vertically continuous. A cover plate 16 is detachably installed on the top surface of the box body 1, and a discharge channel 4 is connected to the bottom surface of the box body 1. A smoke inlet channel 6 and a smoke outlet channel 7 are also connected to the side wall of the box body 1. A dust removal device 5 is also installed on the discharge channel 4. Flue gas enters the filter box through the smoke inlet channel 6, is purified by the filter assembly 9, and is discharged through the smoke outlet channel 7. The filter assembly 9 removes dust through pulse jet cleaning, and the dust falls into the discharge channel 4 and is discharged through the dust removal device 5. The mounting plate 8 has evenly spaced through holes, and each through hole contains a detachably installed filter assembly 9. Specifically, the filter assembly 9 includes a support ring 91 detachably attached to the mounting plate 8 via a connector, a bracket 92 mounted on the support ring 91, and a filter bag 93, with the filter bag 93 fitted over the bracket 92. The pulse device includes an air tank 19 mounted on the side wall of the housing 1 via a support plate 18, and a blowpipe 20 located inside the housing 1. One end of the blowpipe 20 penetrates the housing 1 and connects to the air tank 19, while a nozzle 21 is connected to the portion of the blowpipe 20 located inside the housing 1. Flue gas enters the housing 1 through the smoke inlet channel 6 on the side wall and is distributed to the filter components 9 at each through-hole. When the flue gas passes through the filter bag 93, particulate matter is intercepted on the surface of the filter bag 93, achieving gas-solid separation. The purified gas is discharged through the smoke outlet channel 7. Large particles are captured by directly impacting the filter bag 93 due to inertia, while fine particles adhere to the fiber surface as they move with the airflow. When it is necessary to clean the dust on the surface of the filter bag 93, the pulse valve (not shown in the figure) controls the compressed air in the air tank 19 to instantly blow onto the filter bag 93 through the nozzle 21, causing it to expand rapidly and vibrate. The vibration of the filter bag 93 causes the particulate matter to fall off under inertia and into the bottom discharge channel 4, where it is discharged by the discharge device. It should be noted that pulse jet blowing is an existing technology and will not be discussed in detail here.

[0023] The filter bag 93 described above is supported by the bracket 92 to prevent deformation during flue gas filtration. The support ring 91 used to connect the filter bag 93 is detachably connected to the mounting plate 8 via a connector to facilitate future replacement and maintenance of the filter bag 93.

[0024] Preferably, the dust removal assembly 10 for further cleaning the filter bag 93 includes a set of fixing rings 101 detachably disposed on the bottom surface of the mounting plate 8, with each fixing ring 101 corresponding to a through hole in the mounting plate 8. An mounting ring 102 is rotatably disposed within the fixing rings 101, and a hanger 103 is distributed around the bottom surface of the mounting ring 102 along its axis. A spiral shovel 104, fitted over the filter bag 93, is disposed below the mounting ring 102, and is connected to the mounting ring 102 via the hanger 103. A drive unit is also provided on the cover plate 16 to rotate the mounting ring 102. The drive unit rotates the mounting ring 102, and the mounting ring 102, through the hanger 103, drives the spiral shovel 104 to rotate around the filter bag 93. Its spiral blades contact the surface of the filter bag 93, and through the combined action of mechanical scraping and vibration generated by the rotation of the spiral shovel 104, particulate matter is removed from the surface of the filter bag 93. Furthermore, the rotation of the spiral shovel 104 also scrapes dust downwards from the filter bag 93, reducing dust accumulation on its surface. As a further improvement, bristles 17 are evenly spaced along the inner spiral wall of the spiral shovel 104, engaging with the filter bag 93. As the spiral shovel 104 rotates, the bristles 17 also rotate, scraping and removing particles adhering to the filter bag 93 from its outer surface, achieving efficient dust removal. The bristles 17 are particularly effective at cleaning tightly adhered particles, significantly improving cleaning efficiency. Figure 4 As shown, the longitudinal cross-section of the fixing ring 101 is L-shaped, while the longitudinal cross-section of the mounting ring 102 is inverted L-shaped. That is, the mounting ring 102 can be inserted into the fixing ring 101, and the mounting ring 102 can be fixed to the mounting plate 8 through the fixing ring 101.

[0025] It should be noted that the connecting parts mentioned above can be either bolts or screws, and no further restrictions are imposed here.

[0026] The drive unit for driving the mounting ring 102 includes a second motor 15 mounted on the cover plate 16 and connected to an external power source. The output end of the second motor 15 has a second rotating shaft 14, which passes through the cover plate 16 and the mounting plate 8 and is rotatably mounted to them. The second rotating shaft 14 is connected to the mounting ring 102 via a transmission unit. The output end of the second motor 15 is connected to the second rotating shaft 14, which passes through the cover plate 16 and the mounting plate 8 and is rotatably mounted to them, transmitting power to the transmission unit, which then drives the mounting ring 102 to rotate. The transmission unit specifically includes a second sprocket 13 at the bottom of the rotating shaft and first sprockets 11 on each mounting ring 102. The first sprockets 11 on each set of fixed rings 101 are connected by a chain 12. The second sprocket 13 is located outside the chain 12 and meshes with it. When the second motor 15 drives the second sprocket 13 to rotate via the rotating shaft, the second sprocket 13 drives its corresponding meshed first sprockets 11 to rotate synchronously via the chain 12. The first sprocket 11 drives the mounting ring 102 to rotate, which in turn drives the auger shovel 104 to rotate around the filter bag 93 via the boom 103. The transmission unit uses chain drive, which can maintain an accurate average transmission ratio and has high transmission efficiency.

[0027] To ensure better meshing of the chain 12 with its corresponding first sprockets 11, such as Figure 3 As shown, support shafts 22 are distributed on one side of the chain 12 on the mounting plate 8, with each support shaft 22 located between adjacent first sprockets 11. A third sprocket 23 is rotatably mounted on the bottom surface of the support shaft 22, and the third sprocket 23 meshes with its corresponding chain 12. Using the third sprocket 23, tension can be applied to the chain 12, thereby allowing the chain 12 to mesh with its corresponding first sprocket 11 and preventing the chain 12 from disengaging from the first sprocket 11.

[0028] like Figure 1 and Figure 5 As shown, the bottom surface of the housing 1 is connected to an ash hopper 3, and a discharge channel 4 is located below the ash hopper 3. The discharge device includes a first rotating shaft 51 rotatably disposed within the discharge channel 4, and a first motor 52 disposed on the outer wall of the discharge channel 4. The first motor 52 is connected to the first rotating shaft 51, and the first rotating shaft 51 has flaps 53 circumferentially distributed to match the discharge channel 4. The first motor 52 drives the first rotating shaft 51 to rotate within the discharge channel 4. When the first rotating shaft 51 rotates, the flaps 53 rotate accordingly. When the flaps 53 rotate, their blades contact the inner wall of the discharge channel 4, pushing the particles towards the discharge port. The flaps 53 are matched with the discharge channel 4 to ensure smooth discharge of particles while preventing blockage.

[0029] Operating Instructions: Flue gas enters the housing 1 through the inlet channel 6. Inside the housing 1, the flue gas is filtered by the filter bags 93 in the filter assembly 9. The purified flue gas then enters the filter bags 93 and is discharged through the outlet channel 7. After the flue gas enters the housing 1, the second motor 15 is activated. The second motor 15 drives the second rotating shaft 14 to rotate. The second rotating shaft 14, through the transmission unit, drives the mounting ring 102 in the dust removal assembly 10 to rotate. The mounting ring 102, through the suspension rod 103, drives the spiral shovel 104 to rotate, and the brush bristles 17 on the spiral shovel 104 also rotate, cleaning the dust from the filter bags 93. Alternatively, the pulse device can be activated intermittently to clean the filter bags 93 further. Dust falling from the filter bags 93 falls into the bottom discharge channel 4 and is discharged through the discharge device.

[0030] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A flue gas dust removal device, characterized in that: comprising a filter box, a mounting plate (8) arranged in the filter box, and a filter assembly (9) for filtering flue gas is detachably arranged on the mounting plate (8); a dust removal assembly (10) and a pulse device for cleaning the filter assembly (9) are arranged on the filter box; the filter box comprises a box body (1), a cover plate (16) detachably arranged on the top surface of the box body (1), a discharge channel (4) communicated with the bottom surface of the box body (1), and a flue gas inlet channel (6) and a flue gas outlet channel (7) communicated with the side wall of the box body (1), and an ash discharge device (5) is arranged on the discharge channel (4); the mounting plate (8) is uniformly and spacedly provided with through holes, and the filter assembly (9) is detachably arranged in each through hole; the filter assembly (9) comprises a support ring (91) detachably arranged on the mounting plate (8) through a connecting piece, a support (92) and a filter bag (93) arranged on the support ring (91), and the filter bag (93) is sleeved outside the support (92); the dust removal assembly (10) comprises a group of fixing rings (101) detachably arranged on the bottom surface of the mounting plate (8), each fixing ring (101) of the group of fixing rings (101) is arranged corresponding to the through hole of the mounting plate (8), an installation ring (102) is rotatably arranged in the fixing ring (101), a hanger rod (103) is distributed around the axis of the installation ring (102) on the bottom surface of the installation ring (102), a spiral scraper (104) sleeved outside the filter bag (93) is arranged below the installation ring (102), and the spiral scraper (104) is connected with the installation ring (102) through the hanger rod (103); a driving part for driving the installation ring (102) to rotate is arranged on the cover plate (16).

2. The flue gas dust removal device according to claim 1, characterized in that: the pulse device comprises a gas pocket (19) arranged on the side wall of the box body (1) through a support plate (18), a blowing pipe (20) arranged in the box body (1), one end of the blowing pipe (20) penetrating through the box body (1) and communicated with the gas pocket (19), and a nozzle (21) communicated with part of the blowing pipe (20).

3. The flue gas dust removal device according to claim 2, characterized in that: bristles (17) are uniformly and spacedly arranged on the inner spiral wall of the spiral scraper (104), and the bristles (17) cooperate with the filter bag (93).

4. The flue gas dust removal device according to claim 1, characterized in that: the driving part comprises a second motor (15) arranged on the cover plate (16), a second rotating shaft (14) arranged on the output end of the second motor (15), the second rotating shaft (14) penetrating through the cover plate (16) and the mounting plate (8) and rotatably arranged with the cover plate (16) and the mounting plate (8), and the second rotating shaft (14) is connected with the installation ring (102) through a transmission part; the transmission part comprises a second sprocket (13) arranged on the bottom end of the rotating shaft, a first sprocket (11) arranged on each installation ring (102), the first sprockets (11) on each group of fixing rings (101) are connected through a chain (12), and the second sprocket (13) is located on the outer side of the chain (12) and meshes with the chain (12). ​ 5. A flue gas dedusting device according to claim 4, characterized in that ； Support shafts (22) are distributed on one side of the chain (12) on the mounting plate (8), each support shaft (22) is located between adjacent first sprockets (11), and a third sprocket (23) is rotatably arranged at the bottom surface of the support shaft (22), and the third sprocket (23) is engaged with the corresponding chain (12).

6. The flue gas dust removal device according to claim 4, characterized in that; The bottom surface of the box body (1) is communicated with an ash bucket (3), and the discharge channel (4) is arranged below the ash bucket (3); The discharge device comprises a first rotating shaft (51) rotatably arranged in the discharge channel (4), a first motor (52) arranged on the outer wall of the discharge channel (4), the first motor (52) is connected with the first rotating shaft (51), and the circumferential direction of the first rotating shaft (51) is distributed with a flap (53) matched with the discharge channel (4).

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