A hot-dip galvanizing flue gas collection and treatment device

Abstract

This invention relates to the field of baghouse dust collection technology, specifically a hot-dip galvanized flue gas collection and treatment device; it includes a cylindrical body and a frame supporting and connected below the cylindrical body; the cylindrical body is composed of an upper cylindrical part and a lower inverted conical part; an air outlet is provided at the top of the cylindrical body; an air inlet is provided on the arc-shaped outer wall of the cylindrical part of the cylindrical body; a discharge valve is provided at the bottom of the cylindrical body; a valve stem with multiple valves is rotatably connected inside the discharge valve; the valve stem is driven by a lower motor; an inverted conical cylinder is provided on the inner side of the inverted conical part of the cylindrical body; the bottom of the inverted conical cylinder is fixedly connected to the inner side of the cylindrical body by a fixing block; this invention, because the flue gas enters the cylindrical body and undergoes rotation and centrifugation, allows the gas and dust particles in the flue gas to be initially separated before passing through the filter bag, thereby greatly reducing the difficulty of the flue gas passing through the filter bag and improving the flue gas treatment efficiency.

Description

Technical Field

[0001] This invention relates to the field of baghouse dust collection technology, specifically a hot-dip galvanized flue gas collection and treatment device. Background Technology

[0002] During the production of hot-dip galvanized sheet, the zinc pot is at a high temperature. Liquid zinc evaporates due to the heat, forming zinc vapor. After the zinc vapor escapes from the zinc pot, it comes into contact with the air and undergoes a rapid oxidation reaction. It then condenses and transforms into extremely small solid zinc oxide particles. These fine particles are suspended in the flue gas, which needs to be collected and treated.

[0003] After hot-dip galvanizing fumes are collected, they need to be treated by a flue gas treatment device, which is generally a bag filter. The working principle of a bag filter is that after the dust-laden flue gas enters the bag filter, it passes through the filter bags from the outside to the inside to achieve dust filtration. The filtered flue gas flows out from the bottom to the top. The pulse airflow periodically backwashes the filter bags from the inside to the outside, causing the dust on the outer wall of the filter bags to fall off. The dust will be discharged along the bottom outlet of the bag filter.

[0004] When traditional external filter baghouse dust collectors treat hot-dip galvanizing flue gas, the filter bags are stationary, and dust can only approach the filter bags with the airflow and eventually adhere to the surface of the filter bags. As a result, the filter bags inside the baghouse dust collector have a lot of dust attached, which increases the difficulty of cleaning and affects the dust removal efficiency of the baghouse dust collector. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a hot-dip galvanized flue gas collection and treatment device. In this invention, the flue gas enters the cylinder and undergoes centrifugal rotation, which initially separates the gas and dust particles in the flue gas before it passes through the filter bag. This greatly reduces the difficulty of the flue gas passing through the filter bag and improves the flue gas treatment efficiency.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: A hot-dip galvanizing flue gas collection and treatment device of this invention includes a cylinder and a support frame connected below the cylinder; the cylinder is composed of an upper cylindrical part and a lower inverted conical part; an air outlet connector is provided at the top of the cylinder; an air inlet connector is provided on the arc-shaped outer wall of the cylindrical part of the cylinder; a discharge valve is provided at the bottom of the cylinder; a valve stem with multiple valves is rotatably connected inside the discharge valve; the valve stem is driven by a lower motor; an inverted conical cylinder is provided on the inner side of the inverted conical part of the cylinder; the bottom of the inverted conical cylinder is connected to... The inner side of the cylinder is fixedly connected; the outer conical surface of the inverted cone forms a discharge gap with the inner wall of the cylinder; the upper end of the inverted cone is near the lower end of the cylindrical part of the cylinder; the upper end of the inverted cone is rotatably and sealingly connected to a lower turntable with a lower rotating hole; the inner wall of the upper part of the cylindrical part of the cylinder is rotatably and sealingly connected to an upper turntable with an upper rotating hole; the center of the lower surface of the upper turntable and the center of the upper surface of the lower turntable are fixedly connected by a central rod; the lower turntable is driven by an upper motor; a cylindrical cloth bag is provided between the upper rotating hole and the corresponding lower rotating hole below; a pulse air source assembly is provided above the upper rotating hole of the upper turntable.

[0007] Preferably, the pulse air source assembly includes a blow head, a blow pipe, a pulse valve, and a compressed air tank connected in sequence; the compressed air tank is fixed to the outside of the cylinder; the blow head extends above the upper turntable; the upper turntable can drive the upper rotating hole to pass through the blow head.

[0008] Preferably, a spiral plate is fixedly connected to the inner wall of the cylinder; the spiral plate extends along the inner wall of the cylindrical part and the inverted conical part of the cylinder; the spiral plate is located below the upper turntable; the lower end of the spiral plate extends into the discharge gap.

[0009] Preferably, the pitch of the spiral plate located inside the cylindrical portion of the cylinder is smaller than the pitch of the spiral plate located inside the inverted conical portion of the cylinder.

[0010] Preferably, the air inlet connector is aligned tangentially with the inner wall of the cylinder; the air inlet connector connects to the inner space of the cylinder between the upper and lower turntables; the air inlet connector is positioned close to the upper turntable.

[0011] Preferably, a T-shaped rod is fixedly connected to the bottom of the cylinder; a gear is fixedly connected to the lower end of the T-shaped rod; an upper rotating ring is rotatably connected in the upper rotating hole; a lower disc is rotatably connected in the lower rotating hole; the cloth bag is connected between the corresponding upper rotating ring and the lower disc; a toothed ring is fixedly connected to the upper surface of the upper rotating ring; multiple toothed rings mesh with the same gear.

[0012] Preferably, a uniform partition is fixed to the outer wall of the central rod; the partition separates two adjacent cloth bags; the end of the partition away from the central rod extends to the edge of the lower turntable.

[0013] Preferably, the outer edge of the gear is provided with a notch; the gear ring can enter the notch and disengage from the gear; the gear ring can move out of the notch and re-engage with the gear.

[0014] Preferably, the lower surface of the upper rotating ring and the upper surface of the lower disc are provided with annular grooves; annular strips are slidably connected in the annular grooves; the annular strips are connected to the bottom of the annular grooves by a tension spring; and the cloth bag is fixedly connected between the upper and lower corresponding annular strips.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. In this invention, the flue gas enters the cylinder and undergoes centrifugal rotation, which initially separates the gas and dust particles in the flue gas before it passes through the filter bag. This greatly reduces the difficulty of the flue gas passing through the filter bag and improves the flue gas treatment efficiency.

[0017] 2. This invention, by setting a tangential air inlet connector, allows flue gas to enter tangentially along the inner wall of the cylinder, directly imparting rotational kinetic energy to the flue gas and strengthening the foundation of centrifugal separation. Combined with the inner wall spiral plate, it forms a regular downward spiral flow channel, which not only prolongs the residence time of flue gas in the cylinder, but also guides the flue gas to swirl stably, promoting efficient adhesion of dust particles to the wall and directional settling into the discharge gap, significantly improving the initial gas-solid separation effect, laying the foundation for subsequent bag filtration, and greatly reducing the subsequent filtration load.

[0018] 3. This invention achieves simultaneous revolution and rotation of the filter bag through the meshing of the gear ring and gear, enhancing the centrifugal shedding effect of dust; the partition separates adjacent filter bags to prevent secondary dust adhesion, while also assisting in agitating the smoke and dust, further improving the gas-solid separation efficiency and the self-cleaning ability of the filter bag. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 yes Figure 1 A sectional view; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the air intake connector in this invention; Figure 5 This is a structural diagram of the spiral plate in this invention; Figure 6 This is a perspective view of the cloth bag in this invention; Figure 7 yes Figure 6 Enlarged view of point B in the middle; Figure 8 This is a perspective view of the gear in this invention.

[0021] In the diagram: 1. Cylinder body; 11. Cylinder frame; 12. Cylindrical part; 13. Inverted cone part; 14. Air outlet connector; 15. Air inlet connector; 16. Spiral plate; 2. Discharge valve; 21. Valve stem; 22. Valve; 23. Lower motor; 3. Inverted cone cylinder; 31. Fixing block; 32. Discharge gap; 4. Lower turntable; 41. Lower rotating hole; 42. Upper motor; 43. Lower disc; 44. Annular groove; 45. Annular strip; 46. Tension spring; 56. Upper turntable; 51. Upper rotating hole; 52. Center rod; 53. Upper rotating ring; 54. Gear ring; 55. Baffle plate; 6. Filter bag; 7. Pulse air source assembly; 71. Blow head; 72. Blow pipe; 73. Pulse valve; 74. Compressed air tank; 8. Gear; 81. T-shaped bar; 82. Notch. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 8 As shown, the present invention includes the following embodiments: Example 1: A hot-dip galvanizing flue gas collection and treatment device includes a cylinder 1 and a frame 11 supporting and connected below the cylinder 1; the cylinder 1 is composed of an upper cylindrical part 12 and a lower inverted conical part 13; an air outlet 14 is provided at the top of the cylinder 1; an air inlet 15 is provided on the arc-shaped outer wall of the cylindrical part 12 of the cylinder 1; a discharge valve 2 is provided at the bottom of the cylinder 1; a valve stem 21 with multiple valves 22 is rotatably connected inside the discharge valve 2; the valve stem 21 is driven by a lower motor 23; an inverted conical cylinder 3 is provided inside the inverted conical part 13 of the cylinder 1; the bottom of the inverted conical cylinder 3 is fixedly connected to the inside of the cylinder 1 by a fixing block 31; the inverted conical cylinder 3 is fixedly connected to the inside of the cylinder 1 by a fixing block 31; the inverted conical cylinder 3 is rotatably connected to the upper cylindrical part 1 and the lower conical part 13 is rotatably connected to the lower conical part 1. The outer conical surface of the cone 3 forms a discharge gap 32 with the inner wall of the cylinder 1; the upper end of the inverted cone 3 is close to the lower end of the cylindrical part 12 of the cylinder 1; the upper end of the inverted cone 3 is rotatably and sealingly connected to the lower turntable 4 with a lower rotating hole 41; the inner wall of the upper position of the cylindrical part 12 of the cylinder 1 is rotatably and sealingly connected to the upper turntable 5 with an upper rotating hole 51; the center of the lower surface of the upper turntable 5 and the center of the upper surface of the lower turntable 4 are fixedly connected by a central rod 52; the lower turntable 4 is driven by an upper motor 42; a cylindrical cloth bag 6 is provided between the upper rotating hole 51 and the corresponding lower rotating hole 41 below; a pulse air source assembly 7 is provided above the upper rotating hole 51 of the upper turntable 5.

[0024] In this embodiment, the pulse air source assembly 7 includes a blow nozzle 71, a blow pipe 72, a pulse valve 73, and a compressed air tank 74 connected in sequence; the compressed air tank 74 is fixed to the outside of the cylinder 1; the blow nozzle 71 extends above the upper turntable 5; the upper turntable 5 can drive the upper rotating hole 51 to pass through the blow nozzle 71.

[0025] During the hot-dip galvanizing process, the collected flue gas is introduced into the inner side of the cylinder 1 through the air inlet joint 15. The outer shell of the upper motor 42 is fixed to the inner wall of the inverted cone cylinder 3, and the output end of the upper motor 42 is fixed to the center of the lower surface of the lower turntable 4. When the upper motor 42 works, it drives the lower turntable 4 to rotate. During the rotation of the lower turntable 4, it drives the center rod 52 to rotate. During the rotation of the center rod 52, it drives the upper turntable 5 to rotate synchronously. During the rotation of the upper turntable 5 and the lower turntable 4, multiple cloth bags 6 will rotate around the central axis of the cylinder 1. As the multiple cloth bags 6 rotate with the lower turntable 4 and the upper turntable 5, they will agitate the flue gas inside the cylinder 1. The flue gas rotates inside the cylinder 1. During the process, the particles in the flue gas are moved away from the central rod 52 under the action of centrifugal force. This causes the density of dust particles in the flue gas in the cylinder 1 to decrease as it approaches the central rod 52. This greatly reduces the difficulty for the gas to pass through the filter bag 6 from the outside to the inside. Most of the dust particles in the flue gas converge near the inner wall of the cylinder 1 under centrifugal force. After the dust particles on the inner wall of the cylinder 1 converge, the gravity increases and they move downward and enter the discharge gap 32. After the flue gas rotates and centrifuges inside the cylinder 1, it passes through the filter bag 6 and enters the inner side of the filter bag 6. The filter bag 6 will further filter the particles in the flue gas. The outer surface of the filter bag 6 will intercept the particles in the flue gas on the outer surface. The flue gas passes through the filter bag 6 from the outside in for purification. The purified flue gas then passes through the upper end of the filter bag 6 and the upper rotating hole 51 from bottom to top. The purified flue gas gathers in the space above the upper rotating plate 5 inside the cylinder 1 and is finally discharged along the outlet joint 14. Because the flue gas undergoes centrifugal rotation inside the cylinder 1, the gas and dust particles in the flue gas are initially separated before passing through the filter bag 6, which greatly reduces the difficulty of the flue gas passing through the filter bag 6 and improves the flue gas treatment efficiency. As the flue gas continues to enter the inside of the cylinder 1, dust continues to accumulate on the filter bag 6. Because the filter bag 6 rotates continuously around the central axis of the cylinder 1, the dust attached to the outer wall of the filter bag 6 is subjected to centrifugal force. By using the lower part away from the center rod 52, the self-cleaning purpose is achieved, which greatly reduces the difficulty of cleaning the filter bag 6 using the pulse air source component 7. After the filter bag 6 has been used for a period of time, the compressed gas in the compressed air tank 74 will be sprayed out along the pulse valve 73, the blow pipe 72 and the blow head 71. The blow head 71 is aimed at the upper end of the filter bag 6, and the compressed air enters the filter bag 6 to achieve backwash cleaning. The dust on the filter bag 6 will be further removed and thrown towards the inner wall of the cylinder 1 under the centrifugal force, and finally converge to the discharge gap 32. Since multiple filter bags 6 rotate around the central axis of the cylinder 1, multiple filter bags 6 will pass through the blow head 71 in sequence, so that all filter bags 6 are cleaned.Dust entering the discharge gap 32 will move downwards and approach the discharge valve 2. The discharge valve 2 is a horizontally placed cylindrical shape, hollow inside, and rotatably connected to a valve stem 21. Multiple valves 22 are evenly fixed to the outer wall of the valve stem 21. The valves 22 rotate with the rotation of the valve stem 21. The valve stem 21 is driven by a lower motor 23. The housing of the lower motor 23 is fixed to the outer wall of the discharge valve 2, and the output shaft of the lower motor 23 is fixed to the valve stem 21. During the rotation of the valve stem 21, it will drive the multiple valves 22 to rotate, and the dust in the discharge gap 32 will accumulate at the discharge valve. At the angle between adjacent valves 22 within valve 2, during the rotation of multiple valves 22, on the one hand, the discharge gap 32 is disconnected from the outside, and on the other hand, dust at the angle between adjacent valves 22 is poured out from the lower port of discharge valve 2, achieving the purpose of unloading dust from the cylinder 1; in this embodiment, the filter bag 6 rotates around the central axis of the cylinder 1, so the filter bag 6 can both agitate the flue gas inside the cylinder 1 and shake off the dust attached to the surface of the filter bag 6, reducing dust residue and improving flue gas purification efficiency.

[0026] Example 2: A spiral plate 16 is fixedly connected to the inner wall of the cylinder 1; the spiral plate 16 extends along the inner wall of the cylindrical part 12 and the inverted conical part 13 of the cylinder 1; the spiral plate 16 is located below the upper turntable 5; the lower end of the spiral plate 16 extends into the discharge gap 32.

[0027] In this embodiment, the pitch of the spiral plate 16 located inside the cylindrical portion 12 of the cylinder 1 is smaller than the pitch of the spiral plate located inside the inverted conical portion 13 of the cylinder 1.

[0028] In this embodiment, the air inlet connector 15 is aligned with the tangential direction of the inner wall of the cylinder 1; the air inlet connector 15 is connected to the inner space of the cylinder 1 between the upper turntable 5 and the lower turntable 4; the air inlet connector 15 is located close to the upper turntable 5.

[0029] After the flue gas enters the inner side of the cylinder 1 through the inlet joint 15, multiple filter bags 6 rotate inside the cylinder 1 as the lower turntable 4 and the upper turntable 5 rotate. During the rotation of the filter bags 6, the flue gas inside the cylinder 1 is agitated. A spiral plate 16 is fixedly connected to the inner wall of the cylinder 1, forming a spiral flow channel with the inner wall of the cylinder 1. Thus, the flue gas in the cylinder 1 flows along the spiral flow channel as it rotates under agitation. The direction of the spiral flow is downward, so the flue gas spirals downward along the spiral flow channel. After entering the inner side of the cylinder 1 through the inlet joint 15, the flue gas can quickly spread downwards. The centrifugal force generated during the spiral spreading of the flue gas forces dust particles away from the central rod 52 and tightly adheres to the inner wall of the cylinder 1. The dust particles attached to the inner wall of the cylinder 1 are spirally transported downwards during the entry of new flue gas. The particles will converge into the discharge gap 32 and eventually be discharged along the discharge valve 2. Furthermore, since the pitch of the spiral plate 16 is smaller inside the cylindrical part 12 of the cylinder 1 and larger inside the inverted conical part 13 of the cylinder 1, the residence time inside the cylindrical part 12 of the cylinder 1 is extended, and the spiral rotation along the spiral channel is extended, making the flue gas flow more regular and the separation effect of air and dust particles in the flue gas better. After the dust particles enter the discharge gap 32 along the spiral channel, the dust particles are less likely to be blocked due to the increased pitch of the spiral plate 16, allowing the dust particles to smoothly enter the discharge valve 2. Furthermore, since the air inlet 15 enters the inner side of the cylinder 1 tangentially, the flue gas can obtain greater rotational kinetic energy. Note that the flue gas needs to be drawn into the air inlet 15 by the pump. In this embodiment, by setting a tangential air inlet connector 15, the flue gas enters tangentially along the inner wall of the cylinder 1, directly giving the flue gas rotational kinetic energy and strengthening the foundation of centrifugal separation. Combined with the inner wall spiral plate 16, a regular downward spiral flow channel is formed, which not only prolongs the residence time of the flue gas in the cylinder 1, but also guides the flue gas to swirl stably, so as to promote the efficient adhesion of dust particles to the wall and directional settling into the discharge gap 32, significantly improving the initial gas-solid separation effect, laying the foundation for subsequent bag filter 6 filtration, and greatly reducing the subsequent filtration load.

[0030] Example 3: A T-shaped rod 81 is fixedly connected to the bottom of the inner cylinder 1; a gear 8 is fixedly connected to the lower end of the T-shaped rod 81; an upper rotating ring 53 is rotatably connected in the upper rotating hole 51; a lower disc 43 is rotatably connected in the lower rotating hole 41; the cloth bag 6 is connected between the corresponding upper rotating ring 53 and the lower disc 43; a toothed ring 54 is fixedly connected to the upper surface of the upper rotating ring 53; multiple toothed rings 54 mesh with the same gear 8.

[0031] In this embodiment, a uniform partition 55 is fixed to the outer wall of the central rod 52; the partition 55 separates two adjacent cloth bags 6; the end of the partition 55 away from the central rod 52 extends to the edge of the lower turntable 4.

[0032] During the rotation of the lower turntable 4 and the upper turntable 5, multiple cloth bags 6 will rotate around the central axis of the cylinder 1. The upper end of each cloth bag 6 is connected to an upper rotating ring 53, which rotates within an upper rotating hole 51. The lower end of each cloth bag 6 is connected to a lower disc 43, which rotates within a lower rotating hole 41. A gear ring 54 fixed to the upper end of the upper rotating ring 53 will move around a gear 8. The gear ring 54 meshes with the gear 8, causing the gear ring 54 to rotate. The rotation of the gear ring 54 will drive the upper rotating ring 53 to rotate, which in turn will drive the connected cloth bags 6 to rotate. The rotation of the cloth bags 6 will drive the lower disc 43 to rotate, and the upper rotating ring 53 will rotate within the upper rotating hole 51. As the lower disc 43 rotates within the lower rotating hole 41, the cloth bag 6 also rotates on its own axis during its revolution. This rotation makes the dust on the outer surface of the cloth bag 6 easier to detach under centrifugal force. A partition 55 is fixedly connected between the upper disc 5 and the lower disc 4. The partition 55 separates adjacent cloth bags 6, preventing dust from adhering to adjacent bags 6 during centrifugal rotation and causing secondary adhesion. The dust on the cloth bags 6 is thrown onto the partition 55 and the inner wall of the cylinder 1 under centrifugal force. The partition 55 also helps to better agitate the dust inside the cylinder 1. In this embodiment, the meshing of the toothed ring 54 and the gear 8 enables the filter bag 6 to revolve around the sun and rotate on its own axis, thereby enhancing the centrifugal shedding effect of dust. The partition 55 separates adjacent filter bags 6 to prevent secondary adhesion of dust, while also assisting in stirring up the smoke and dust, further improving the gas-solid separation efficiency and the self-cleaning ability of the filter bag 6.

[0033] Example 4: The outer edge of the gear 8 is provided with a notch 82; the gear ring 54 can enter the notch 82 and disengage from the gear 8; the gear ring 54 can move out of the notch 82 and re-engage with the gear 8.

[0034] In this embodiment, an annular groove 44 is provided on the lower surface of the upper rotating ring 53 and the upper surface of the lower disc 43; an annular strip 45 is slidably connected in the annular groove 44; the annular strip 45 and the bottom of the annular groove 44 are connected by a tension spring 46; the cloth bag 6 is fixedly connected between the upper and lower corresponding annular strips 45.

[0035] During the revolution of the cloth bag 6 around the central axis of the cylinder 1 driven by the lower turntable 4 and the upper turntable 5, the toothed ring 54 on the upper rotating ring 53 moves synchronously with the revolution path. When the toothed ring 54 does not enter the notch 82 of the gear 8, the toothed ring 54 and the gear 8 remain meshed. At this time, the revolution of the upper turntable 5 and the lower turntable 4 drives the toothed ring 54 to roll around the gear 8. The gear 8 remains stationary, and the meshing action forces the toothed ring 54 to drive the upper rotating ring 53 to rotate in the upper rotating hole 51. When the upper rotating ring 53 rotates, it will drive the upper end of the connected cloth bag 6 to rotate synchronously. The lower end of the cloth bag 6 is connected to the lower disc 43, and the lower disc 43 rotates with the cloth bag 6 in the lower rotating hole 41, which causes the cloth bag 6 to twist and deform. The twisting of the cloth bag 6 will exert a squeezing force on the dust clumps on its outer surface, forcing the dust clumps to crack and making it easier for the cloth bag 6 to separate from the dust. Simultaneously, the twisted bag 6 pulls the annular strip 45 in the annular groove 44, causing the annular strip 45 to slide along the annular groove 44 and stretch the tension spring 46, thus achieving the state of the bag 6 twisting and pulling the tension spring 46. When the toothed ring 54 moves to the notch 82 of the gear 8 with the revolution, the toothed ring 54 disengages from the gear 8, and the meshing force disappears. At this time, the stretched tension spring 46 generates a restoring force, pulling the annular strip 45 to slide in the opposite direction along the annular groove 44. The annular strip 45 drives the upper and lower ends of the bag 6 to reset synchronously, so that the twisted bag 6 returns to its initial stretched state. When the toothed ring 54 rotates out of the notch 82 of the gear 8 with the revolution, it re-engages with the gear 8, and the above twisting, pulling, and resetting process is repeated again, continuously repeating with the revolution of the bag 6. The variable speed rotation of the bag 6 makes it easier for dust on the surface of the bag 6 to fall off. In this embodiment, the intermittent meshing of the gear ring 54 and the gear 8 is achieved through the notch 82 of the gear 8. Combined with the structure of the annular groove 44, the annular strip 45 and the tension spring 46, the bag 6 can synchronously complete the periodic reciprocating action of "twisting and pulling the tension spring 46 - resetting the tension spring 46" during the revolution. The tension generated when the bag 6 is twisted and the elastic force when it is reset, plus the squeezing and cracking effect on the clumps of dust during the twisting process, can effectively shake off the dust adhering to the outer surface of the bag 6, especially thoroughly remove the clumps of dust, greatly enhance the self-cleaning effect of the bag 6. Compared with simple centrifugal self-cleaning, it can more thoroughly remove the dust in the gaps of the bag 6 and reduce the cleaning load of the pulse air source component 7. Meanwhile, the tension spring 46 can provide flexible tension to the filter bag 6 by stretching and resetting, preventing dust accumulation and caking caused by the filter bag 6 being stationary for a long time or rotating in one direction. In addition, the tension spring 46 can adaptively compensate for the thermal expansion and contraction and deformation of the filter bag 6 in the high-temperature flue gas environment, always maintaining the tension of the filter bag 6, preventing the filter bag 6 from becoming loose, wrinkled, or colliding and wearing with the partition plate 55 or the inner wall of the cylinder 1, ensuring the stability of the filter area of ​​the filter bag 6, improving the filtration efficiency, significantly extending the service life of the filter bag 6, and reducing the frequency of equipment maintenance.

[0036] Example 5: The end of the air inlet connector 15 connected to the cylinder 1 is lower than the end away from the cylinder 1, and the conveying direction of the air inlet connector 15 is tangential to the spiral flow channel.

[0037] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance. In the description of the present invention, "fixed connection" refers to a fixed connection.

[0038] 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 illustrative of the 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 present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot-dip galvanizing flue gas collection and treatment device, comprising a cylindrical body and a frame supporting and connected below the cylindrical body; characterized in that: The cylinder is composed of an upper cylindrical section and a lower inverted conical section. An air outlet is located at the top of the cylinder. An air inlet is located on the arc-shaped outer wall of the cylindrical section. A discharge valve is located at the bottom of the cylinder. A valve stem with multiple valves is rotatably connected inside the discharge valve. The valve stem is driven by a lower motor. An inverted conical cylinder is located inside the inverted conical section of the cylinder. The bottom of the inverted conical cylinder is fixedly connected to the inner side of the cylinder via a fixing block. The outer conical surface of the inverted conical cylinder forms a discharge gap with the inner wall of the cylinder. The upper end of the inverted conical cylinder is located near the lower end of the cylindrical section of the cylinder. A lower turntable with a lower rotating hole is rotatably and sealingly connected to the upper end of the cylindrical section. An upper turntable with an upper rotating hole is rotatably and sealingly connected to the inner wall of the upper cylindrical section of the cylinder. The center of the lower surface of the upper turntable and the center of the upper surface of the lower turntable are fixedly connected by a central rod. The lower turntable is driven by an upper motor. A cylindrical cloth bag is located between the upper rotating hole and the corresponding lower rotating hole below. A pulse air source assembly is located above the upper rotating hole of the upper turntable. A spiral plate is fixedly connected to the inner wall of the cylinder; the spiral plate extends along the inner wall of the cylindrical and inverted conical portions of the cylinder; the spiral plate is located below the upper turntable; the lower end of the spiral plate extends into the discharge gap; A T-shaped rod is fixedly connected to the bottom of the cylinder; a gear is fixedly connected to the lower end of the T-shaped rod; an upper rotating ring is rotatably connected to the upper rotating hole; a lower disc is rotatably connected to the lower rotating hole; the cloth bag is connected between the corresponding upper rotating ring and the lower disc; a toothed ring is fixedly connected to the upper surface of the upper rotating ring; multiple toothed rings mesh with the same gear. The outer edge of the gear is provided with a notch; the gear ring can enter the notch and disengage from the gear; the gear ring can move out of the notch and re-engage with the gear; The lower surface of the upper rotating ring and the upper surface of the lower disc are provided with annular grooves; annular strips are slidably connected in the annular grooves; the annular strips are connected to the bottom of the annular grooves by a tension spring; the cloth bag is fixedly connected between the upper and lower corresponding annular strips.

2. The hot-dip galvanizing flue gas collection and treatment device according to claim 1, characterized in that: The pulse air source assembly includes a blow nozzle, a blow pipe, a pulse valve, and a compressed air tank connected in sequence; the compressed air tank is fixed to the outside of the cylinder; the blow nozzle extends above the upper turntable; the upper turntable can drive the upper rotating hole to pass through the blow nozzle.

3. The hot-dip galvanizing flue gas collection and treatment device according to claim 1, characterized in that: The pitch of the spiral plate located inside the cylindrical part of the cylinder is smaller than the pitch of the spiral plate inside the inverted conical part of the cylinder.

4. The hot-dip galvanizing flue gas collection and treatment device according to claim 1, characterized in that: The air inlet connector is aligned with the tangential direction of the inner wall of the cylinder; the air inlet connector connects to the inner space of the cylinder between the upper and lower turntables; the air inlet connector is located close to the upper turntable.

5. The hot-dip galvanizing flue gas collection and treatment device according to claim 1, characterized in that: The outer wall of the central rod is fixed with uniform partitions; the partitions separate two adjacent cloth bags; the end of the partition away from the central rod extends to the edge of the lower turntable.

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