Gas purification device for steel strand galvanization

Abstract

The invention discloses a gas purification device for steel strand galvanization, and relates to the technical field of gas purification, the gas purification device comprises a protective cover, the protective cover is arranged at the top of a zinc pot for steel strand galvanization, sealing boxes are arranged on the two sides of the exterior of the protective cover, and a plurality of guide wheels are arranged in the sealing boxes; the steel strand penetrates into the zinc pot along the guide wheel and is galvanized, a rotating rod is arranged in the sealing box, an air inlet fan is arranged at one end of the rotating rod, a gas collecting hood is arranged in the heat exchange box, and a heat exchange groove used for being filled with a heat exchange medium is formed between the heat exchange box and the gas collecting hood. The smoke is subjected to indirect heat exchange between the gas collecting hood and the heat exchange groove, the smoke entering the sleeve is subjected to secondary heat exchange through the cylindrical groove filled with cooling water, heat energy in the smoke is recycled, the air inlet fan connected with the steel strand in the sealing box forms a barrier, a channel for smoke to escape is blocked, and smoke of the zinc pot is captured.

Description

Technical Field

[0001] This invention relates to the field of gas purification technology, specifically a gas purification device for galvanizing steel strands. Background Technology

[0002] Steel strand is a metal product made of multiple high-strength steel wires twisted together. It is widely used in key fields such as bridge cables, power transmission, building structures and geotechnical engineering. In order to improve the corrosion resistance of steel strand and extend its service life, it is usually necessary to galvanize its surface. The galvanizing process mainly adopts the hot-dip galvanizing process, in which the pre-treated steel strand is immersed in molten zinc, so that the zinc layer and the steel wire substrate form a dense protective layer through metallurgical bonding.

[0003] During the hot-dip galvanizing process of steel strand, the zinc pot remains at a high temperature. The molten zinc reacts with air, residues on the steel wire surface, and flux, producing a large amount of high-temperature flue gas containing zinc oxide particles, chlorides, ammonia compounds, and volatile organic compounds. Direct emission of this gas will cause air pollution and pose a threat to human health and the surrounding environment. Existing flue gas purification equipment suffers from low purification efficiency and is prone to clogging. The heat energy contained in the flue gas is lost directly without being recovered, resulting in energy waste. Summary of the Invention

[0004] The purpose of this invention is to provide a gas purification device for galvanizing steel strands, so as to solve the problem of inconvenience in using existing gas purification devices.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A gas purification device for galvanizing steel strand includes a protective cover and further includes:

[0007] A heat exchange box is provided. The protective cover is installed on top of the zinc pot with galvanized steel strand. Sealing boxes are provided on both sides of the outer side of the protective cover. Multiple guide wheels are provided inside the sealing boxes. The steel strand passes through the zinc pot along the guide wheels and is galvanized. A rotating rod is provided inside the sealing box. An air intake fan is provided at one end of the rotating rod. A transmission component is provided between the rotating rod and the guide wheels. A heat exchange box is provided on top of the protective cover. A gas collecting hood is provided inside the heat exchange box. A heat exchange groove for filling heat exchange medium is provided between the heat exchange box and the gas collecting hood. A communicating box connected to the inside of the zinc pot is provided at the bottom of the gas collecting hood. A flow groove for flue gas to flow is provided inside the gas collecting hood.

[0008] The heat exchange box has a connecting pipe, a fixed frame at the top, support pipes on both sides inside the fixed frame, multiple sleeves inside the support pipes, cylindrical grooves inside the sleeves, connecting pipes at both ends of the sleeves, support plates inside the fixed frame, a purification box between two support plates, an absorbent for absorbing flue gas inside the purification box, one end of the connecting pipe extending into the purification box, another connecting pipe inside the same sleeve extending into the heat exchange tank, a sealing ring inside the connecting pipe, and a cover plate rotatably mounted on the sealing ring;

[0009] The drive mechanism, connected to the connecting pipe, can drive the two connecting pipes inside the sleeve to move closer or further apart, and can draw the flue gas into the purification box for absorption and purification by the absorbent.

[0010] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0011] In one alternative: the driving mechanism includes a turntable, a connecting frame, and a rotating ring. The support plate has multiple telescopic rods inside. The turntable is rotatably mounted inside the support plate. One end of each telescopic rod passes through the turntable. The turntable has a connecting frame, and one end of the connecting frame has a rotating ring. The rotating ring is sleeved on the outside of the connecting pipe.

[0012] In one alternative: a connecting plate is provided between the two support plates, and a transmission rod is provided between the two connecting plates, with one end of the telescopic rod in contact with the transmission rod.

[0013] In one alternative: a drive rod is provided at the center of the connecting plate, and cams are provided at both ends of the drive rod. The cams are located inside the connecting plate and are in contact with the transmission rod.

[0014] In one alternative: a motor is provided outside the fixing frame, and the rotating end of the motor is connected to the drive rod.

[0015] In one alternative: one end of the connecting pipe is inserted into the interior of the purification box and is provided with an exhaust pipe; the top of the purification box is provided with a protective cover, and the protective cover is provided with a handle and an exhaust pipe.

[0016] In one alternative: the support plate has an installation block inside, and the connecting pipe is connected to the support plate through the installation block.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The gas purification device for galvanizing steel strands is equipped with a heat exchange tank and a sleeve. The flue gas undergoes indirect heat exchange between the gas collection hood and the heat exchange tank. The flue gas entering the sleeve undergoes secondary heat exchange through a cylindrical tank filled with cooling water, further extracting waste heat and recovering the thermal energy in the flue gas, thus reducing the overall energy consumption of the production process. The air intake fan connected to the steel strand inside the sealed box forms a barrier, blocking the escape path of the flue gas, thereby achieving the capture of zinc pot flue gas, improving the workshop working environment, and protecting the health of the operators. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a gas purification device for galvanizing steel strands.

[0020] Figure 2 This is a schematic diagram of the protective cover in a gas purification device for galvanizing steel strands.

[0021] Figure 3 This is a cross-sectional view of the sealing box in a gas purification device for galvanizing steel strands.

[0022] Figure 4 This is a schematic diagram of the guide wheel in a gas purification device for galvanizing steel strands.

[0023] Figure 5 This is a schematic diagram of the heat exchange box in a gas purification device for galvanizing steel strands.

[0024] Figure 6 This is a schematic diagram of the purification box in a gas purification device for galvanizing steel strands.

[0025] Figure 7 This is a schematic diagram of the fixing frame in a gas purification device for galvanizing steel strands.

[0026] Figure 8 This is a cross-sectional view of the gas collection hood in a gas purification device for galvanizing steel strands.

[0027] Figure 9 This is a schematic diagram of the connecting groove in a gas purification device for galvanizing steel strands.

[0028] Figure 10 This is a schematic diagram of the cam structure in a gas purification device for galvanizing steel strands.

[0029] Figure 11 This is a schematic diagram of the sleeve in a gas purification device for galvanizing steel strands.

[0030] Figure 12 This is a cross-sectional view of the sleeve in a gas purification device for galvanizing steel strands.

[0031] Figure 13 This is a cross-sectional view of the connecting pipe in a gas purification device for galvanizing steel strands.

[0032] Figure Labels and Annotations: 1-Zinc Pot, 2-Protective Cover, 3-Sealed Box, 4-Heat Exchange Box, 401-Heat Exchange Tube, 5-Mounting Plate, 6-Fixing Frame, 601-Support Plate, 602-Connecting Plate, 7-Purification Box, 8-Protective Cover, 9-Handle, 10-Exhaust Pipe, 11-Guide Roller, 12-Heating Tube, 13-Steel Strand Body, 14-Guide Wheel, 15-Rotating Rod, 16-Intake Fan, 17-Mounting Rod, 18-Worm Gear, 1 9-worm gear, 20-connecting box, 21-air hood, 211-flow groove, 212-through groove, 22-connecting pipe, 221-mounting block, 23-air outlet pipe, 24-sleeve, 241-cylindrical groove, 25-transmission rod, 26-cam, 27-drive rod, 28-motor, 29-support pipe, 30-connecting frame, 31-rotating ring, 32-turntable, 33-telescopic rod, 34-cover plate, 35-sealing ring, 36-clamping plate. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0034] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0035] like Figure 1-13 As shown, a gas purification device for galvanizing steel strand is provided in one embodiment of the present invention, including a protective cover 2, characterized in that it further includes:

[0036] The heat exchange box 4, with the protective cover 2 mounted on top of the zinc pot 1 for galvanizing the steel strand, has sealing boxes 3 fixedly connected to its outer two sides, thus being installed as a whole on the zinc pot 1. Multiple guide wheels 14 are provided inside the sealing box 3. The steel strand passes through the zinc pot along the guide wheels 14 and is galvanized. Guide rollers 11 are provided inside the zinc pot 1 to guide and stabilize the steel strand. A rotating rod 15 is provided inside the sealing box 3, with an air intake fan 16 at one end. A transmission component, using a worm gear structure, is provided between the rotating rod 15 and the guide wheels 14. The mounting rod 17 is used for the rotational mounting of the guide wheel 14. A worm gear 18 is provided on the outside of the mounting rod 17, and a worm wheel meshing with the worm gear 18 is provided on the rotating rod 15. When the steel strand 13 moves and drives the guide wheel 14 to rotate, the power is transmitted to the worm wheel 19 through the mounting rod 17 and the worm gear 18, which in turn drives the rotating rod 15 and the air intake fan 16 to rotate. When the air intake fan 16 rotates, it blows the outside air into the sealed box 3. The airflow can effectively prevent the high temperature zinc-containing fumes in the protective cover 2 from overflowing from the gaps in the steel strand, thus improving the working environment and preventing harmful gases from harming the health of the operators.

[0037] The protective cover 2 is equipped with a heat exchange box 4 on its top. Mounting plates 5 are installed on both sides of the heat exchange box 4, and clamping plates 36 are installed on the mounting plates 5 for fixing the protective cover 2 to the heat exchange box 4. A gas collecting hood 21 is installed inside the heat exchange box 4. The gas collecting hood 21 and the inner wall of the heat exchange box 4 form a sealed heat exchange trough 401, which can be filled with heat exchange media such as water. A communicating box 20 connected to the inside of the zinc pot is installed at the bottom of the gas collecting hood 21. A flow channel 211 for the flow of flue gas is installed inside the gas collecting hood 21. High-temperature flue gas flows from the zinc pot... 1. The flue gas enters the flow channel 211 through the connecting box 20 and flows horizontally upward along the flow channel 211. It exchanges heat with the cold medium in the heat exchange tank 401 through the wall of the gas collecting hood 21, thereby reducing the temperature of the flue gas. The heat is absorbed by the medium. The heat exchange tank 401 is connected to the heating system (heating pipe 12) of the zinc pot 1 through the pipeline. The recovered heat energy is used to preheat the flux and keep the zinc pot warm, realizing the repeated use of energy and reducing the overall energy consumption. After the initial heat exchange, the flue gas is discharged from the through channels 212 on both sides of the gas collecting hood 21 and enters the subsequent purification unit for treatment.

[0038] A connecting pipe 22 is provided. A fixing frame 6 is provided on the top of the heat exchange box 4. Support pipes 29 are provided on both sides inside the fixing frame 6. Multiple sleeves 24 are provided inside the support pipes 29. Cylindrical grooves 241 are opened inside the sleeves 24. The support pipes 29 are connected to the external circulating water circuit, so that the lower temperature hot water flows in and fills the internal space of the cylindrical grooves 241 of the support pipes 29 and sleeves 24. When the high temperature flue gas flows through the sleeves 24, its heat is absorbed by the hot water inside through the sleeve wall, realizing the secondary recovery of the waste heat of the flue gas and improving the heat recovery efficiency of the entire system. Connecting pipes 22 are provided at both ends of the sleeves 24. Support plates 601 are provided inside the fixing frame 6. Two support plates 601 A purification box 7 is installed between the two sections. The purification box 7 is filled with an absorbent for absorbing and purifying zinc oxide dust and acidic gases (such as hydrogen chloride) in the flue gas. This absorbent can be an alkaline solution (such as sodium hydroxide solution) or a specific complexing agent. Through acid-base neutralization or chemical adsorption, it captures and fixes harmful components in the flue gas, thereby achieving deep purification of the flue gas. One end of the connecting pipe 22 extends into the purification box 7, and another connecting pipe 22 located inside the same sleeve 24 extends into the heat exchange tank 401. A sealing ring 35 is installed inside the connecting pipe 22, and a cover plate 34 is rotatably mounted on the sealing ring 35. The cover plate 34 is mounted on the sealing ring 35 by a torsion spring. The installation positions of the cover plates 34 at both ends of the sleeve 24 are as follows: Figure 13As shown, the cover plates 34 inside the two sets of sleeves 24 are installed in opposite positions. The purification process is controlled by the sleeves 24 and the connecting pipes 22. Sleeve A 24 is used for the introduction of flue gas. When the connecting pipes 22 at both ends of the sleeve 24 are far apart, the cover plate 34 of the lower connecting pipe 22 is opened (connecting to the heat exchange tank 401), while the cover plate 34 of the upper connecting pipe 22 remains closed. At this time, the flue gas in the heat exchange tank 401 is drawn into the sleeve 24 and completes secondary waste heat exchange as it flows through. Subsequently, the drive mechanism drives the two connecting pipes 22 to approach each other, the lower cover plate 34 closes, and the upper cover plate 34 opens (connecting to the purification box 7). The flue gas temporarily stored in the sleeve 24 is pressed into the purification box 7 and purified after fully contacting the absorbent. The sleeve 24 is used for the spraying of the absorbent. When the drive mechanism drives the connecting pipes 22 at both ends of the sleeve 24 to approach each other, the upper cover plate 34 closes and the lower cover plate 34 opens. Under pressure, the absorbent in the purification box 7 is sprayed downward through the sleeve 24 into the heat exchange tank 401. When the two connecting pipes 22 move away from each other, the upper cover plate 34 opens and the lower cover plate 34 closes, allowing the absorbent to be added into the sleeve 24. The system integrates the transportation of flue gas, waste heat recovery, and the addition and spraying of the purifying agent into one system, reducing the energy consumption of subsequent purification treatment, realizing the directional spraying and circulation of the absorbent, and improving the utilization rate of the agent.

[0039] The driving mechanism, connected to the connecting pipe 22, can drive the two connecting pipes 22 inside the sleeve 24 to move closer or further apart, and can draw the flue gas into the purification box 7 and purify it through the absorbent.

[0040] like Figure 1-11 As shown, in a preferred embodiment of the present invention, the driving mechanism includes a turntable 32, a connecting frame 30, and a rotating ring 31. Multiple telescopic rods 33 are disposed inside the support plate 601. The turntable 32 is rotatably disposed inside the support plate 601. One end of each telescopic rod 33 passes through the turntable 32, and the telescopic rod 33 has an external thread. A threaded groove matching the external thread is formed on the surface of the turntable 32. The connecting frame 30 is disposed on the turntable 32, and a rotating ring 31 is disposed at one end of the connecting frame 30. The rotating ring 31 is sleeved on the outside of the connecting pipe 22. A [missing information - likely a concave or convex structure] is disposed between the two support plates 601. A connecting plate 602 is provided, and a transmission rod 25 is provided between the two connecting plates 602. One end of the telescopic rod 33 is in contact with the transmission rod 25. A drive rod 27 is provided at the center of the connecting plate 602. A cam 26 is provided at both ends of the drive rod 27. The cam 26 is located inside the connecting plate 602 and is in contact with the transmission rod 25. The cam 26 rotates and periodically presses the transmission rod 25 on both sides, causing the transmission rod 25 to reciprocate. The turntable 32 rotates and drives the connecting pipe 22 to move through the connecting frame 30 and the rotating ring 31, so that the two connecting pipes 22 in the same sleeve 24 move closer or further apart.

[0041] like Figure 1-10 As shown, in a preferred embodiment of the present invention, a motor 28 is provided on the outside of the fixing frame 6. The rotating end of the motor 28 is connected to the drive rod 27, and the drive motor 28 drives the drive rod 27 and the cams 26 at both ends to rotate.

[0042] like Figure 1-2 As shown, in a preferred embodiment of the present invention, one end of the connecting pipe 22 is inserted into the interior of the purification box 7 and is provided with an exhaust pipe 23 to discharge the flue gas inside the sleeve 24 into the interior of the purification box 7. The top of the purification box 7 is provided with a protective cover 8, and the protective cover 8 is provided with a handle 9 and an exhaust pipe 10.

[0043] like Figure 11-12 As shown, in a preferred embodiment of the present invention, the support plate 601 is provided with an installation block 221, and the connecting pipe 22 is connected to the support plate 601 through the installation block 221.

[0044] The above embodiments of the present invention provide a gas purification device for galvanizing steel strands. Sufficient hot water is injected into the heat exchange tank 401 of the heat exchange box 4 and the circulating water path of the support pipe 29 and sleeve 24 to ensure unobstructed circulation. Sufficient chemical absorbent is filled into the purification box 7. The heating pipe 12 of the zinc pot 1 is activated to heat the zinc liquid. The steel strand to be galvanized passes sequentially through the guide wheels 14 inside the two sealed boxes 3 and enters the zinc pot 1 for hot-dip galvanizing. The movement of the steel strand 13 drives the guide wheels 14 to rotate. The air intake fan 16 continuously blows air into the sealed box 3, forming a barrier to effectively prevent high-temperature flue gas from the protective cover 2 above the zinc pot 1 from escaping through the gaps in the steel strand inlet and outlet. The high-temperature flue gas enters the flow channel of the gas collection hood 21 through the connecting box 20. 211. The flue gas undergoes efficient heat exchange with the hot water in the heat exchange tank 401 through the wall of the gas collection hood 21. The cooled flue gas is discharged from the through slot 212 at the top of the gas collection hood 21. The flue gas is pressed into the purification box 7 and comes into full contact with the absorbent. The zinc oxide dust, acidic gases and other harmful components are effectively absorbed and neutralized to achieve deep purification. The purified clean gas is discharged through the exhaust pipe 10 at the top of the purification box 7. Under pressure, the absorbent in the purification box 7 is sprayed downward through the sleeve 24 to the designated area of ​​the heat exchange tank 401. The sprayed absorbent can come into contact with the rising flue gas in the upper space of the heat exchange tank 401 in advance for preliminary purification. The purification box 7 can be easily opened through the handle 9 on the protective cover 8 to replenish or replace the absorbent or perform system maintenance.

[0045] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A gas purification device for galvanizing steel strand, comprising a protective cover, characterized in that, Also includes: A heat exchange box is provided. The protective cover is installed on top of the zinc pot with galvanized steel strand. Sealing boxes are provided on both sides of the outer side of the protective cover. Multiple guide wheels are provided inside the sealing boxes. The steel strand passes through the zinc pot along the guide wheels and is galvanized. A rotating rod is provided inside the sealing box. An air intake fan is provided at one end of the rotating rod. A transmission component is provided between the rotating rod and the guide wheels. A heat exchange box is provided on top of the protective cover. A gas collecting hood is provided inside the heat exchange box. A heat exchange groove for filling heat exchange medium is provided between the heat exchange box and the gas collecting hood. A communicating box connected to the inside of the zinc pot is provided at the bottom of the gas collecting hood. A flow groove for flue gas to flow is provided inside the gas collecting hood. The heat exchange box has a connecting pipe, a fixed frame at the top, support pipes on both sides inside the fixed frame, multiple sleeves inside the support pipes, cylindrical grooves inside the sleeves, connecting pipes at both ends of the sleeves, support plates inside the fixed frame, a purification box between two support plates, an absorbent for absorbing flue gas inside the purification box, one end of the connecting pipe extending into the purification box, another connecting pipe inside the same sleeve extending into the heat exchange tank, a sealing ring inside the connecting pipe, and a cover plate rotatably mounted on the sealing ring; The drive mechanism, connected to the connecting pipe, can drive the two connecting pipes inside the sleeve to move closer or further apart, and can draw the flue gas into the purification box for absorption and purification by the absorbent.

2. The gas purification device for galvanizing steel strand according to claim 1, characterized in that, The driving mechanism includes a turntable, a connecting frame, and a rotating ring. Multiple telescopic rods are provided inside the support plate. The turntable is rotatably mounted inside the support plate. One end of each telescopic rod passes through the turntable. A connecting frame is provided on the turntable. A rotating ring is provided at one end of the connecting frame. The rotating ring is sleeved on the outside of the connecting pipe.

3. The gas purification device for galvanizing steel strand according to claim 2, characterized in that, A connecting plate is provided between the two support plates, and a transmission rod is provided between the two connecting plates. One end of the telescopic rod is in contact with the transmission rod.

4. The gas purification device for galvanizing steel strand according to claim 3, characterized in that, A drive rod is provided at the center of the connecting plate, and cams are provided at both ends of the drive rod. The cams are located inside the connecting plate and are in contact with the transmission rod.

5. The gas purification device for galvanizing steel strand according to claim 4, characterized in that, A motor is installed on the outside of the fixed frame, and the rotating end of the motor is connected to the drive rod.

6. The gas purification device for galvanizing steel strand according to claim 1, characterized in that, One end of the connecting pipe is inserted into the purification box and is provided with an exhaust pipe. The top of the purification box is provided with a protective cover, and the protective cover is provided with a handle and an exhaust pipe.

7. The gas purification device for galvanizing steel strand according to claim 1, characterized in that, An installation block is provided inside the support plate, and the connecting pipe is connected to the support plate through the installation block.

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