A waste heat utilization device for hot-dip galvanized steel strip production

Abstract

The present application relates to the technical fields of hot galvanizing waste heat separation, and discloses a waste heat utilization device for hot galvanizing strip steel production, which comprises a base frame, a box body fixedly installed on the top of the base frame, an air inlet installed on the side wall of the box body, a dust discharge hopper communicatively arranged at the bottom of the box body, a gas supply system arranged above the box body, an air disc communicatively arranged at the output end of the gas supply system, a plurality of pulse valves, a sealing disc arranged below the pulse valves, an upper partition plate sealingly connected to the outer ring of the sealing disc, the upper partition plate fixedly connected to the box body, the pulse valves penetrating through the sealing disc and being in communication with the space below the sealing disc, and a bag shaking mechanism, first shaking rods, second shaking rods and third shaking rods driven by the driving mechanism to continuously and intermittently impact the inner surface of the filter bag, so that the filter bag is shaken and the adhered dust is deeply cleaned, which is conducive to preventing the filter bag from being damaged due to friction caused by the external beating of the filter bag.

Description

Technical Field

[0001] This invention relates to the field of waste heat separation technology in hot-dip galvanizing, specifically to a waste heat utilization device in the production of hot-dip galvanized steel strip. Background Technology

[0002] Hot-dip galvanized steel strip is a steel product made by continuously immersing cold-rolled or hot-rolled steel strip in molten zinc after surface cleaning and annealing, so that its surface is uniformly coated with a layer of zinc alloy. Relying on the physical isolation of the zinc layer and the dual protection of cathodic sacrificial, it has good corrosion resistance, formability and weldability, and is widely used in building roofs and walls, automobile bodies, home appliance shells and hardware components.

[0003] Chinese invention patent CN121243872A discloses a hot-dip galvanized zinc fume dust removal device. This device, through the setting of a power-accumulating bag shaking mechanism, in conjunction with a blower and a back-blowing pipe, uses the back-blowing pipe to blow compressed air into the filter bag, causing the surface of the filter bag to bulge violently. At the same time, the airflow impact breaks the adhesion between the dust layer and the filter bag surface, causing the dust to peel off from the filter bag. The intermittent power-accumulating impact of the U-shaped beater on the filter bag causes the filter bag to vibrate, breaking the electrostatic adsorption and mechanical adhesion of the dust, accelerating the complete removal of dust, reducing the filter bag clogging rate and filtration resistance, reducing the frequency of filter bag replacement, reducing maintenance costs and ensuring production efficiency.

[0004] The above-mentioned technical solution cleans the filter bags from the outside by setting up a power-storing bag-shaking mechanism and a swing-shaking dust-vibrating mechanism. However, for stubborn dust stuck to the filter bags, when operating from the outside of the filter bags, this mechanical beating structure cannot clean them evenly. Moreover, when pressure is applied to the filter bags from the outside, the impact force generated is large. Since there is a cage inside the filter bag to support it, there is no buffer space for the filter bag when it is beating, which causes the filter bag to be rubbed between the cage and the U-shaped bar, resulting in the risk of damage to the filter bag. This is not conducive to maintaining the filtration performance of the filter bag. Therefore, this invention proposes a waste heat utilization device in the production of hot-dip galvanized steel strip to solve the above-mentioned defects. Summary of the Invention

[0005] The purpose of this invention is to provide a waste heat utilization device in the production of hot-dip galvanized steel strip, so as to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: It includes a base frame, a housing fixedly installed on the top of the base frame, an air inlet installed on the side wall of the housing, a dust discharge hopper connected to the bottom of the housing, an air supply system installed above the housing, and an air distribution plate connected to the output end of the air supply system;

[0006] A pulse valve is provided, and several pulse valves are provided, all of which are connected to the output end of the air plate. A sealing plate is provided below the pulse valve. An upper partition is sealed to the outer ring of the sealing plate. The upper partition is fixedly connected to the housing. The pulse valve passes through the sealing plate and is connected to the space below the sealing plate.

[0007] The partition plate is the same number as the pulse valve and is arranged around the perimeter. The top and bottom of the partition plate are respectively fixedly connected to a top ring and a bottom ring. The top ring is fixedly connected to the inner surface of the sealing disc. A corrosion-resistant filter bag is sleeved on the outside of the top ring and the bottom ring. The top of the corrosion-resistant filter bag is detachably installed on the sealing disc and sealed to it.

[0008] A bag-shaking mechanism is installed inside the corrosion-resistant filter bag and is arranged symmetrically above and below the corrosion-resistant filter bag.

[0009] A drive mechanism is provided to drive a bag-shaking mechanism to clean the corrosion-resistant filter bags.

[0010] Preferably, the interior of the housing is symmetrically arranged with crossbeams, and several electromagnets are fixed and linearly arrayed on the crossbeams, and the electromagnets are magnetically connected to the bottom ring.

[0011] Preferably, the bag-shaking mechanism includes a lower swing arm, with two lower swing arms respectively disposed on the top ring and the bottom ring. Several sets of lower swing arms are provided and adapted to the partition plate. One end of each lower swing arm is hinged to the top ring and the bottom ring respectively. A first shaking rod is fixedly connected to the end of each lower swing arm away from the connection point with the top ring and the bottom ring. First limiting posts are symmetrically arranged on both sides of the swing range of the lower swing arm. The first limiting posts abut against the lower swing arm and are fixedly connected to the top ring and the bottom ring respectively.

[0012] Preferably, an upper swing arm is hinged to the lower swing arm near the end of the first shaking rod, a slider is slidably disposed on the upper swing arm, and a pressure spring is elastically installed inside the upper swing arm within the sliding space of the slider, with the two ends of the pressure spring abutting against the slider and the upper swing arm respectively.

[0013] Preferably, a rotating arm is hinged to the top of the slider, the middle part of the rotating arm is rotatably connected to the bottom ring and the bottom ring respectively, a second shaking rod is fixedly connected to the end of the rotating arm away from the slider, and second limiting posts are symmetrically arranged on both sides of the rotation space of the rotating arm. The second limiting posts abut against the rotating arm and are fixedly connected to the top ring and the bottom ring respectively.

[0014] Preferably, a third shaking rod is fixedly connected to the side of the upper swing arm near the rotating arm. The ends of the first, second, and third shaking rods are all bent, and the shaking rods are relatively close to the inner surface of the corrosion-resistant filter bag.

[0015] Preferably, a pull rod is hinged to the side of the upper swing arm relative to the side of the third shaking rod, and a center connector is fixedly connected to the middle of the pull rod, with the top end of the center connector facing the center of the corrosion-resistant filter bag.

[0016] Preferably, the drive mechanism includes a drive motor disposed on the surface of the upper partition plate, the output end of the drive motor is rotatably connected to a rotating shaft, a portion of a bevel gear set is linearly arrayed on the rotating shaft, the other portion of the bevel gear is connected to a reversing shaft, the reversing shaft is rotatably disposed on the partition plate, a power gear is fixedly connected to the bottom of the reversing shaft, and a gear ring is meshed on the side of the power gear.

[0017] Preferably, a double-ring connecting disc is fixedly connected to the inner surface of the toothed ring, the top of the double-ring connecting disc is rotatably connected to the middle of the partition plate, the double-ring connecting disc is hollow inside, and a turntable is fixedly connected to the bottom of the inner and outer rings of the double-ring connecting disc. A shaped groove is opened through the turntable, and a first release port a and a second release port b are respectively provided at intervals on the shaped groove.

[0018] Preferably, the first release port a and the second release port b are connected and have a horizontal stroke difference. An installation plate is provided below the turntable. The installation plate is fixedly connected to the partition plate. A guide groove is provided around the installation plate. One end of the middle connecting member passes through the guide groove and the irregular groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] In this invention, the interior of the filter bag is divided into four equal parts by the partition plate, top ring and bottom ring. Combined with the pulse valve set at the top, high-pressure gas is evenly introduced and distributed, so that each part of the filter bag is evenly pressurized.

[0021] In this invention, the bag-shaking mechanism initially surrounds and expands the filter bag to ensure filtration throughput and prevent the filter bag from collapsing. After pulse dust removal, for stubborn dust stuck to the filter bag, the first, second, and third shaking rods continuously and intermittently impact the inner surface of the filter bag under the drive mechanism, causing the filter bag to shake and deeply clean the attached dust. This helps to prevent the filter bag from being damaged by friction due to external slapping and avoids hard friction.

[0022] In this invention, the driving mechanism allows the middle connecting piece to be released sequentially according to the first and second release ports, thereby increasing the shaking impact force of the shaking rod and further improving the dust cleaning effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention;

[0025] Figure 3 This is a partial structural diagram of the present invention;

[0026] Figure 4 For the present invention Figure 3 Enlarged structural diagram of region A in the middle;

[0027] Figure 5 This is a schematic diagram of the internal unfolded structure of the box body of the present invention;

[0028] Figure 6 This is a schematic diagram of the cross-sectional structure of the filter bag of the present invention;

[0029] Figure 7 This is a top view of the bag-shaking mechanism of the present invention.

[0030] Figure 8 This is a partial structural schematic diagram of the bag-shaking mechanism of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the partition plate of the present invention;

[0032] Figure 10 This is a schematic diagram of the drive mechanism of the present invention;

[0033] Figure 11 This is a schematic diagram of the structure of the first release port and the second release port of the present invention.

[0034] In the picture:

[0035] 100. Base frame;

[0036] 200. Housing; 201. Air inlet; 202. Ash hopper; 203. Air supply system; 204. Air coil; 205. Pulse valve; 206. Sealing plate; 207. Horizontal frame; 208. Electromagnet; 209. Upper partition;

[0037] 300. Divider plate; 301. Top ring; 302. Bottom ring;

[0038] 400. Corrosion-resistant filter bags;

[0039] 500. Shaking mechanism; 501. Lower swing arm; 502. First shaking rod; 503. First limiting post; 504. Upper swing arm; 505. Slider; 506. Pressure spring; 507. Rotary arm; 508. Second shaking rod; 509. Second limiting post; 510. Third shaking rod; 511. Pull rod; 512. Mid-position connecting piece;

[0040] 600, Drive mechanism; 601, Drive motor; 602, Rotating shaft; 603, Bevel gear set; 604, Reversing shaft; 605, Power gear; 606, Gear ring; 607, Double-ring connecting plate; 608, Turntable; 609, Irregular groove; 609a, First release port; 609b, Second release port; 610, Mounting plate; 611, Guide groove. Detailed Implementation

[0041] 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.

[0042] Please see Figures 1 to 11 The present invention provides a technical solution: including a base frame 100, a box 200 fixedly installed on the top of the base frame 100, an air inlet 201 installed on the side wall of the box 200, a ash discharge hopper 202 connected to the bottom of the box 200, an air supply system 203 provided above the box 200, and an air plate 204 connected to the output end of the air supply system 203.

[0043] Pulse valve 205, several pulse valves 205 are provided, and all of them are connected to the output end of air plate 204. A sealing plate 206 is provided below the pulse valve 205. An upper partition 209 is sealed to the outer ring of the sealing plate 206. The upper partition 209 is fixedly connected to the housing 200. The pulse valve 205 passes through the sealing plate 206 and is connected to the space below the sealing plate 206.

[0044] The partition plate 300 is the same number as the pulse valve 205 and is arranged around it. The top and bottom of the partition plate 300 are respectively fixedly connected to the top ring 301 and the bottom ring 302. The top ring 301 is fixedly connected to the inner surface of the sealing disc 206. The top ring 301 and the bottom ring 302 are covered with a corrosion-resistant filter bag 400. The top of the corrosion-resistant filter bag 400 is detachably installed on the sealing disc 206 and sealed to it.

[0045] The bag shaking mechanism 500 is located inside the corrosion-resistant filter bag 400 and is arranged symmetrically above and below the corrosion-resistant filter bag 400.

[0046] Drive mechanism 600 is used to drive bag shaking mechanism 500 to clean corrosion-resistant filter bag 400;

[0047] In this embodiment, during the processing stage, the zinc fume utilization device first introduces residual heat zinc fume into the housing 200 through the air inlet 201. The temperature of the inlet zinc fume is stably maintained in the range of 130-160℃. The separated gas passes through the corrosion-resistant filter bag 400 and is discharged to the outside through the sealing plate 206. When the throughput of the corrosion-resistant filter bag 400 decreases after long-term use, the cleaning procedure is started.

[0048] In this embodiment, during the cleaning process, firstly, the gas supply system 203 outputs high-pressure gas to each gas plate 204 through the pipeline, and then the gas plate 204 outputs gas to multiple pulse valves 205 at the bottom. The pulse gas is evenly discharged into the four gas delivery spaces formed by the four partition plates 300, which evenly divides the corrosion-resistant filter bag 400 into four parts. The corrosion-resistant filter bag 400 parts corresponding to the four gas delivery spaces are cleaned, and the dust attached to the outer surface of the corrosion-resistant filter bag 400 is cleaned and falls into the ash discharge hopper 202.

[0049] The box 200 has a cross frame 207 symmetrically arranged inside. Several electromagnets 208 are fixed and linearly arrayed on the cross frame 207. The electromagnets 208 are magnetically connected to the bottom ring 302. The electromagnets 208 limit the upper and lower positions of the corrosion-resistant cloth bag 400 to prevent shaking during the separation process.

[0050] The bag shaking mechanism 500 includes a lower swing arm 501. The lower swing arms 501 are arranged in pairs on the top ring 301 and the bottom ring 302 respectively. Several sets of lower swing arms 501 are provided and are adapted to the partition plate 300. One end of the lower swing arm 501 is hinged to the top ring 301 and the bottom ring 302 respectively. The end of the lower swing arm 501 away from the connection with the top ring 301 and the bottom ring 302 is fixedly connected to a first shaking rod 502. The swing range of the lower swing arm 501 is symmetrically provided with first limiting posts 503 on both sides. The first limiting posts 503 abut against the lower swing arm 501 and are fixedly connected to the top ring 301 and the bottom ring 302 respectively.

[0051] An upper swing arm 504 is hinged to the end of the lower swing arm 501 near the first shaking rod 502. A slider 505 is slidably mounted on the upper swing arm 504. A pressure spring 506 is elastically installed inside the upper swing arm 504 within the sliding space of the slider 505. The two ends of the pressure spring 506 abut against the slider 505 and the upper swing arm 504, respectively.

[0052] A rotating arm 507 is hinged to the top of the slider 505. The middle part of the rotating arm 507 is rotatably connected to the bottom ring 302 and the bottom ring 302 respectively. A second shaking rod 508 is fixedly connected to the end of the rotating arm 507 away from the slider 505. Second limiting posts 509 are symmetrically arranged on both sides of the rotation space of the rotating arm 507. The second limiting posts 509 abut against the rotating arm 507 and are fixedly connected to the top ring 301 and the bottom ring 302 respectively.

[0053] A third shaking rod 510 is fixedly connected to the side of the upper swing arm 504 near the rotating arm 507. The ends of the first shaking rod 502, the second shaking rod 508 and the third shaking rod 510 are all bent, and the shaking rods are relatively close to the inner surface of the corrosion-resistant filter bag 400.

[0054] A pull rod 511 is hinged to the side of the upper swing arm 504 relative to the side of the third shaking rod 510. A middle connecting piece 512 is fixedly connected to the middle of the pull rod 511, and the top end of the middle connecting piece 512 faces the center of the corrosion-resistant filter bag 400.

[0055] In this embodiment, in the initial state, the first shaking rod 502 and the second shaking rod 508 are in contact with the inner surface of the corrosion-resistant filter bag 400 and open the corrosion-resistant filter bag 400. The pull rod 511 is pushed by the irregular groove 609 on the turntable 608, which drives the upper swing arm 504 connected at both ends to swing. The upper swing arm 504 rotates around the connection between itself and the lower swing arm 501. This stage is the energy storage stage. The push force of the pull rod 511 overcomes the tension of the pressure spring 506, and the pressure spring 506 is briefly compressed. When the slider 505 moves briefly from one end of the upper swing arm 504 to the other end, it drives the rotating arm 507 to rotate. When the middle connecting piece 512 on the pull rod 511 moves to the other side of the guide groove 611, the pressure spring 506 is fully released again. At this time, relative to the initial state, the lower swing arm 501 and the rotating arm 507 are in opposite angles, with the center of the angle facing the center of the corrosion-resistant filter bag 400. In the initial state, the angle between the two faces the outside of the corrosion-resistant filter bag 400.

[0056] In this embodiment, while the lower swing arm 501 and the rotating arm 507 are opening at the angle of change, the first shaking rod 502 and the second shaking rod 508 detach from the corrosion-resistant filter bag 400 and swing toward the center of the corrosion-resistant filter bag 400, respectively. During this process, the first limiting post 503 and the second limiting post 509 respectively stop the lower swing arm 501 and the rotating arm 507, limiting the first shaking rod 502 and the second shaking rod 508. At the same time, under the pushing force, the upper swing arm 504 causes the third shaking rod 510 to move toward the corrosion-resistant filter bag 400 and contact the corrosion-resistant filter bag 400, shaking the corrosion-resistant filter bag 400. After the third shaking rod 510 shakes, it is pulled back again. At the same time, the first shaking rod 502 and the second shaking rod 508 shake toward the corrosion-resistant filter bag 400, thus performing intermittent bag shaking operation to shake and clean the stubborn dust stuck to the filter bag 400, destroying the structure of the stubborn dust and causing the stubborn dust to disintegrate.

[0057] The drive mechanism 600 includes a drive motor 601 disposed on the surface of the upper partition 209. The output end of the drive motor 601 is rotatably connected to a rotating shaft 602. A portion of a bevel gear set 603 is linearly arrayed on the rotating shaft 602. The other portion of the bevel gear is connected to a reversing shaft 604. The reversing shaft 604 is rotatably disposed on the partition 300. A power gear 605 is fixedly connected to the bottom of the reversing shaft 604. A gear ring 606 meshes with the side of the power gear 605.

[0058] A double-ring connecting plate 607 is fixedly connected to the inner surface of the toothed ring 606. The top of the double-ring connecting plate 607 is rotatably connected to the middle of the partition plate 300. The double-ring connecting plate 607 is hollow inside. A turntable 608 is fixedly connected to the bottom of the inner and outer rings of the double-ring connecting plate 607. A shaped groove 609 is opened through the turntable 608. A first release port 609a and a second release port 609b are respectively provided at intervals on the shaped groove 609.

[0059] The first release port 609a and the second release port 609b are connected and have a horizontal stroke difference. A mounting plate 610 is provided below the turntable 608. The mounting plate 610 is fixedly connected to the partition plate 300. A guide groove 611 is provided around the mounting plate 610. One end of the middle connecting piece 512 passes through the guide groove 611 and the irregular groove 609.

[0060] In this embodiment, after the initial cleaning is completed, most of the dust on the corrosion-resistant filter bag 400 is removed. At this time, the drive mechanism 600 is turned on, and the drive motor 601 drives the rotating shaft 602 to rotate continuously. The rotating shaft 602 changes the transmission direction through the bevel gear set 603, which drives the bottom reversing shaft 604 to rotate. The reversing shaft 604 drives the double ring connecting plate 607 to rotate in one direction through the gear and the gear ring 606. During the rotation of the double ring connecting plate 607, the intermediate connecting piece 512 is driven to slide back and forth along the guide groove 611 through the irregular groove 609. During the process, the intermediate connecting piece 512 drives the pull rod 511 to drive the drive mechanism 600 to run.

[0061] In this embodiment, when the turntable 608 rotates, the intermediate connecting member 512 moves along with the transmission of the irregular groove 609. When the intermediate connecting member 512 falls from the irregular groove 609 into the first release port 609a, due to the horizontal travel difference, it is subjected to the elastic force of the pressure springs 506 at both ends, causing the intermediate connecting member 512 to quickly disengage and move into the first release port 609a. Subsequently, it smoothly moves into the second release port 609b along the connection between the irregular guide groove 611 and the first release port 609a. During this process, the middle connecting piece 512 is quickly dropped into the second release port 609b under the action of the pressure spring 506. This process is repeated, and the first shaking rod 502, the second shaking rod 508 and the third shaking rod 510 are rapidly released as they approach the corrosion-resistant filter bag 400. Under the action of the pressure spring 506, the shaking rods move quickly towards the corrosion-resistant filter bag 400, which increases the movement speed of the shaking rods and increases the elasticity of the shaking rods, thereby enhancing the vibration force of the corrosion-resistant filter bag 400 and strengthening the cleaning effect.

[0062] The method of use and advantages of this invention: The waste heat utilization device in the production of hot-dip galvanized steel strip operates as follows:

[0063] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown:

[0064] S1: When the device is running, zinc fumes at a constant temperature of 130-160℃ enter the chamber 200, are filtered by the corrosion-resistant filter bag 400 and then discharged. When the filter bag flux decreases and the resistance increases, the self-cleaning program is activated.

[0065] S2: High-pressure gas is pulsed through air plate 204 and pulse valve 205 to blow the four filter bags divided by partition plate 300, shaking the loose dust on the surface to the ash discharge hopper 202, completing the initial dust removal.

[0066] S3: The drive mechanism 600 drives the connecting plate to rotate via gear reversal transmission. Through the cooperation of the irregular groove 609 and the guide groove 611, it drives the middle connecting piece 512 and the pull rod 511 to reciprocate, providing power for the mechanical bag shaking.

[0067] S4: Pull rod 511 drives the swing arm to swing, compressing pressure spring 506 to store energy, realizing the reversal of the shaking rod position. Through repeated energy storage and release by the spring, multiple sets of shaking rods intermittently impact and shake the filter bag, peeling off the zinc fume sticky and stubborn dust that clings to the bag.

[0068] S5: The middle connector 512 slides intermittently along the release port of the irregular groove 609, and with the rapid energy release of the spring, it greatly improves the impact force of the shaking rod, enhances the filter bag cleaning effect, and ensures the stable air flow of the filter bag.

[0069] 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 waste heat recovery device for hot-dip galvanized steel strip production, characterized in that, include: A base frame (100) is provided, a box (200) is fixedly installed on the top of the base frame (100), an air inlet (201) is installed on the side wall of the box (200), a ash hopper (202) is connected to the bottom of the box (200), an air supply system (203) is provided above the box (200), and an air plate (204) is connected to the output end of the air supply system (203). A pulse valve (205) is provided, and each pulse valve (205) is connected to the output end of the air plate (204). A sealing plate (206) is provided below the pulse valve (205). An upper partition plate (209) is sealed to the outer ring of the sealing plate (206). The upper partition plate (209) is fixedly connected to the housing (200). The pulse valve (205) passes through the sealing plate (206) and is connected to the space below the sealing plate (206). A partition plate (300) is provided, the number of which is the same as that of the pulse valve (205) and they are arranged around each other. A top ring (301) and a bottom ring (302) are fixedly connected to the top and bottom of the partition plate (300) respectively. The top ring (301) is fixedly connected to the inner surface of the sealing disc (206). A corrosion-resistant filter bag (400) is sleeved on the outside of the top ring (301) and the bottom ring (302). The top of the corrosion-resistant filter bag (400) is detachably installed on the sealing disc (206) and sealed to it. A bag-shaking mechanism (500) is provided inside the corrosion-resistant filter bag (400), and the bag-shaking mechanism (500) is arranged symmetrically above and below the corrosion-resistant filter bag (400); A drive mechanism (600) is used to drive a bag-shaking mechanism (500) to clean the corrosion-resistant filter bag (400).

2. The waste heat recovery device for hot-dip galvanized steel strip production according to claim 1, characterized in that: The box (200) is symmetrically arranged with a cross frame (207) inside. Several electromagnets (208) are fixed and linearly arrayed on the cross frame (207). The electromagnets (208) are magnetically connected to the bottom ring (302).

3. The waste heat recovery device for hot-dip galvanized steel strip production according to claim 1, characterized in that: The shaking bag mechanism (500) includes a lower swing arm (501). The lower swing arms (501) are arranged in pairs on the top ring (301) and the bottom ring (302). There are several sets of lower swing arms (501) and they are adapted to the partition plate (300). One end of the lower swing arm (501) is hinged to the top ring (301) and the bottom ring (302) respectively. The end of the lower swing arm (501) away from the connection with the top ring (301) and the bottom ring (302) is fixedly connected to a first shaking rod (502). The swing range of the lower swing arm (501) is symmetrically provided with first limiting posts (503) on both sides. The first limiting posts (503) abut against the lower swing arm (501) and are fixedly connected to the top ring (301) and the bottom ring (302) respectively.

4. The waste heat recovery device for hot-dip galvanized steel strip production according to claim 3, characterized in that: An upper swing arm (504) is hinged to the end of the lower swing arm (501) near the first shaking rod (502). A slider (505) is slidably disposed on the upper swing arm (504). A pressure spring (506) is elastically installed in the upper swing arm (504) within the sliding space of the slider (505). The two ends of the pressure spring (506) abut against the slider (505) and the upper swing arm (504) respectively.

5. The waste heat recovery device for hot-dip galvanized steel strip production according to claim 4, characterized in that: The top of the slider (505) is hinged with a rotating arm (507). The middle part of the rotating arm (507) is rotatably connected to the bottom ring (302) and the bottom ring (302) respectively. A second shaking rod (508) is fixedly connected to one end of the rotating arm (507) away from the slider (505). Second limiting posts (509) are symmetrically arranged on both sides of the rotation space of the rotating arm (507). The second limiting posts (509) abut against the rotating arm (507) and are fixedly connected to the top ring (301) and the bottom ring (302) respectively.

6. The waste heat recovery device for hot-dip galvanized steel strip production according to claim 4, characterized in that: A third shaking rod (510) is fixedly connected to the side of the upper swing arm (504) near the rotating arm (507). The ends of the first shaking rod (502), the second shaking rod (508) and the third shaking rod (510) are all bent, and the shaking rods are relatively close to the inner surface of the corrosion-resistant filter bag (400).

7. The waste heat recovery device for hot-dip galvanized steel strip production according to claim 6, characterized in that: The upper swing arm (504) has a pull rod (511) hinged to one side of the third shaking rod (510). A middle connecting piece (512) is fixedly connected to the middle of the pull rod (511), and the top end of the middle connecting piece (512) faces the center of the corrosion-resistant filter bag (400).

8. The waste heat recovery device for hot-dip galvanized steel strip production according to claim 1, characterized in that: The drive mechanism (600) includes a drive motor (601) disposed on the surface of the upper partition (209). The output end of the drive motor (601) is rotatably connected to a rotating shaft (602). A portion of a bevel gear set (603) is linearly arrayed on the rotating shaft (602). The other portion of the bevel gear is connected to a reversing shaft (604). The reversing shaft (604) is rotatably disposed on the partition plate (300). A power gear (605) is fixedly connected to the bottom of the reversing shaft (604). A gear ring (606) meshes with the side of the power gear (605).

9. A waste heat recovery device for hot-dip galvanized steel strip production according to claim 8, characterized in that: The inner surface of the toothed ring (606) is fixedly connected to a double-ring connecting plate (607). The top of the double-ring connecting plate (607) is rotatably connected to the middle of the partition plate (300). The double-ring connecting plate (607) is hollow inside. The bottom of the inner and outer rings of the double-ring connecting plate (607) is fixedly connected to a turntable (608). A shaped groove (609) is opened through the turntable (608). A first release port (609a) and a second release port (609b) are respectively provided at intervals on the shaped groove (609).

10. A waste heat recovery device for hot-dip galvanized steel strip production according to claim 9, characterized in that: The first release port (609a) is connected to the second release port (609b) and is provided with a horizontal stroke difference. An installation plate (610) is provided below the turntable (608). The installation plate (610) is fixedly connected to the partition plate (300). A guide groove (611) is provided around the installation plate (610). One end of the middle connecting member (512) passes through the guide groove (611) and the irregular groove (609).

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