Automatic waste gas purification device for hot galvanizing production

Abstract

The application discloses an automatic waste gas purification device for hot galvanizing production and relates to the technical field of waste gas treatment. The device comprises a purification bin, a partition, a filter cartridge, a cooling cavity, a first filter cavity, a second filter cavity, a cooling assembly, a rotating part and a spiral conveying mechanism. The spiral conveying mechanism is configured to drive the upward conveying of filter particles in the first filter cavity and the downward conveying of filter particles in the second filter cavity. In the application, the first spiral conveying sheet and the second spiral conveying sheet are arranged in the filter cartridge to drive the activated carbon particles in the first filter cavity and the second filter cavity to form a countercurrent closed loop. This makes the activated carbon close to the air inlet side (high-temperature side) be quickly removed and replaced by activated carbon with lower temperature and higher adsorption capacity, fundamentally eliminates the temperature gradient problem in the fixed bed layer, avoids the desorption, deactivation and safety hazards caused by local high temperature, and significantly improves the overall adsorption efficiency and the utilization rate of activated carbon.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to an automatic waste gas purification device for hot-dip galvanizing production. Background Technology

[0002] Hot-dip galvanizing (also known as hot-dip zinc plating) is a very mature and efficient metal corrosion protection process. It involves immersing pre-treated steel parts in molten zinc to form a zinc or zinc alloy coating on the steel surface, thereby significantly improving the corrosion resistance of the steel material.

[0003] To reduce the temperature of exhaust gas, existing technologies typically employ external cooling equipment such as condensers for pre-cooling before the exhaust gas enters the activated carbon adsorption bed. However, this cooling method has significant limitations: the condenser can only cool the gas phase as a whole before it enters the adsorption bed. Once the exhaust gas enters the activated carbon granular layer, due to heat exchange between the exhaust gas and the granular layer, as well as the exothermic effect of adsorption, a significant temperature gradient forms along the thickness of the activated carbon granular layer. Specifically, activated carbon granules near the inlet side are in direct contact with the high-temperature airflow, and continuous heating causes them to rapidly reach adsorption saturation or even desorption and deactivation, easily leading to localized overheating. Conversely, activated carbon granules farther from the inlet side have had their heat absorbed as the airflow passes through the preceding bed layers, resulting in less heat impact on them. While they retain adsorption capacity, they cannot fully utilize it.

[0004] This existing external cooling equipment cannot effectively eliminate the defect of uneven heating inside the adsorption bed, resulting in low overall adsorption efficiency and low effective utilization of the activated carbon particle layer, and there is always a safety hazard in the local high temperature area. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic waste gas purification device for hot-dip galvanizing production, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic waste gas purification device for hot-dip galvanizing production, comprising a purification chamber, wherein an air outlet and an air inlet are respectively provided on the purification chamber, a partition is provided inside the purification chamber, and a filter cylinder is connected to the partition. The inner cavity of the filter cylinder is divided into a cooling chamber, a first filter chamber and a second filter chamber from the inside to the outside, and a cooling component is provided inside the cooling chamber. The filter cylinder is provided with a rotating part, and the rotating part is provided with a spiral conveying mechanism extending into the first filter chamber and the second filter chamber. The spiral conveying mechanism drives the filter particles in the first filter chamber to be conveyed upward and the filter particles in the second filter chamber to be conveyed downward. The upper part of the first filter chamber is connected to the upper part of the second filter chamber, and the lower part of the second filter chamber is connected to the lower part of the first filter chamber, so as to form a counter-current closed-loop circulation path for the filter particles.

[0007] Furthermore, the spiral conveying mechanism includes a first spiral conveying plate and a second spiral conveying plate coaxially fixed to the rotating part. The first spiral conveying plate is disposed in the second filter cavity, and the second spiral conveying plate is disposed in the first filter cavity. The spiral directions of the first spiral conveying plate and the second spiral conveying plate are opposite.

[0008] Furthermore, the upper and lower parts of the cylinder wall of the first filter chamber are respectively provided with an upper feed port and a lower feed port, and the upper feed port and the lower feed port connect the first filter chamber and the second filter chamber. The cooling chamber, the first filter chamber, and the second filter chamber are all provided with multiple air holes on their cylindrical walls, and the air holes connect the cooling chamber, the first filter chamber, and the second filter chamber.

[0009] Furthermore, a floating ring is fixedly connected to the upper end of the second spiral conveyor plate, and a mounting arm is provided at the upper end of the floating ring. A rolling part is rotatably connected to the upper end of the mounting arm. A fixed ring is fixed to the top wall of the first filter chamber. A rolling groove is provided on the lower end face of the fixed ring. The rolling part rolls with the lower end face of the fixed ring and the rolling groove. The two ends of the rolling groove along the circumferential direction are a straight section and an inclined section, so that when the rolling part moves to different positions, it drives the second spiral conveyor plate to produce axial elastic deformation and release.

[0010] Furthermore, the end face of the rotating part is provided with a first connecting groove, and the partition plate is provided with a through hole, the first connecting groove and the through hole being positioned corresponding to each other; The rotating part is also coaxially rotatably provided with a rotating disk, and the rotating disk is provided with a second connecting groove. The rotating disk can adjust the overlapping area of ​​the first connecting groove and the second connecting groove by rotating relative to the rotating part. The purification chamber is provided with a motor for driving the rotating part to rotate.

[0011] Furthermore, a cylindrical part is coaxially fixed to the rotating part, and the rotating disk is rotatably mounted on the cylindrical part; The cylindrical part is fitted with a deformable component that can deform when heated, and a stop pin is fixed to the end face of the rotating disk. The movable end of the deformable component is engaged between the stop pins and slides in contact with them.

[0012] Furthermore, the deformable component is made of shape memory alloy. When the deformable component is heated to a preset threshold, it bends or stretches, thereby causing the rotating disk to rotate via the stop pin.

[0013] Furthermore, the cooling assembly includes a cooling copper tube passing through the filter cartridge, the lower end of the cooling copper tube extending into the cooling cavity, and the portion of the cooling copper tube located in the cooling cavity is fitted with spiral fins.

[0014] Furthermore, the cross-sections of the cooling chamber, the first filter chamber, and the second filter chamber are all annular and concentrically distributed. The rotating part is coaxially disposed at the lower opening of the filter cylinder. The outer diameter of the rotating part is adapted to the inner diameter of the second filter chamber to close the lower openings of the first filter chamber, the second filter chamber, and the cooling chamber.

[0015] Furthermore, a hollow frame is fixedly installed in the inner cavity of the purification chamber, and a slot is provided on the hollow frame. The upper end of the filter cylinder passes through the slot and is fixedly supported on the hollow frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention has the technical effect of eliminating temperature gradients and improving adsorption efficiency and safety: By setting counter-rotating first and second spiral conveyor plates inside the filter cartridge, the activated carbon particles in the first and second filter chambers are driven to form a counter-current closed-loop circulation. This allows the activated carbon near the air inlet side (high-temperature side) to be quickly removed and replaced with activated carbon at a lower temperature and with stronger adsorption capacity, fundamentally eliminating the temperature gradient problem inside the fixed bed, avoiding desorption, deactivation, and safety hazards caused by local high temperatures, and significantly improving the overall adsorption efficiency and activated carbon utilization rate. 2. This invention has the technical effect of preventing particle clogging and bridging, and renewing the adsorption surface: By adding a vibration and loosening mechanism consisting of a floating ring, a rolling section, a fixed ring, and rolling grooves with varying heights (straight and inclined sections), the spiral conveyor blades generate periodic axial compression and rapid release (ejection shaking) during rotation. This mechanism not only keeps the activated carbon particles in a loose state during transfer, preventing bridging and gravitational resistance, but also breaks up agglomerated dust, preventing pore blockage, thereby continuously exposing fresh adsorption surfaces and ensuring smooth filtration. 3. The present invention has the technical advantage of intelligent flow regulation with adaptive exhaust gas temperature: The system utilizes shape memory alloy deformation components to sense the temperature of the exhaust gas entering the cooling chamber. When the temperature abnormally rises above a threshold, the deformation component undergoes mechanical deformation, causing a stop pin to rotate and automatically reduce the overlapping area of ​​the intake communication slot, thereby lowering the exhaust gas flow rate. This negative feedback protection mechanism effectively avoids thermal overload caused by high temperature and large exhaust gas volume, protecting the adsorption material and extending its service life. 4. This invention has the technical effect of enhancing heat exchange efficiency and ensuring the optimal adsorption temperature: Spiral fins are fitted onto the cooling copper pipes inside the cooling chamber, which greatly increases the heat exchange area between the exhaust gas and the cooling components. This allows the high-temperature exhaust gas to be quickly removed, ensuring that the exhaust gas entering the subsequent adsorption chamber remains within the optimal adsorption temperature range of the activated carbon. This reduces the negative impact of high temperature on the adsorption process from the source. 5. This invention has the technical advantages of high structural stability and high integration: By setting up a hollow frame inside the purification chamber to provide stable support for the filter cartridges, and highly integrating multiple mechanisms such as cooling, conveying, vibration loosening, and temperature and flow regulation into the concentrically distributed filter cartridges, a complete waste gas purification process that completes cooling, two-stage adsorption, material circulation, and safety self-control within a single device is achieved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an automatic waste gas purification device for hot-dip galvanizing production according to the present invention. Figure 2 This is a schematic diagram showing the positional relationship of the partition, filter cylinder, and hollow frame after assembly in this invention. Figure 3 for Figure 2 A schematic diagram showing the positional relationship of the structure from another perspective; Figure 4 This is a schematic diagram showing the positional relationship between the filter cylinder and the cooling copper pipe after assembly in this invention; Figure 5 for Figure 4 A schematic diagram showing the positional relationship of the structure from another perspective; Figure 6 for Figure 4 A schematic diagram showing the positional relationship of the middle section after it has been cut open; Figure 7 for Figure 4 Schematic diagram of the positional relationships of the central structure after explosive decomposition; Figure 8 This is a schematic diagram showing the positional relationship of the rotating part, rotating disk, and cooling copper pipe after assembly in this invention. Figure 9 for Figure 8 A schematic diagram of the positional relationship of the central structure from a first-person perspective; Figure 10 for Figure 8 Schematic diagram of the positional relationship of the middle structure from a second perspective; Figure 11 This is a schematic diagram showing the positional relationship of the first spiral conveyor plate, the second spiral conveyor plate, and the floating ring after assembly in this invention; Figure 12 for Figure 11 A magnified schematic diagram of the positional relationship of the local structure at point A in the middle; Figure 13 for Figure 11 A magnified schematic diagram of the positional relationship of the local structure at point B in the middle section; Figure 14 This is a schematic diagram of the structure of the filter cartridge after it has been cut open in this invention.

[0018] The following are explanations of the reference numerals in the figures: 1. Air outlet; 2. Purification chamber; 3. Hollow frame; 4. Filter cylinder; 5. Air hole; 6. Partition; 7. Air inlet; 8. Motor; 9. Cooling copper pipe; 10. Through hole; 11. Motor base; 12. Rotating part; 13. First connecting groove; 14. Rotating disk; 15. Second spiral conveyor plate; 16. First spiral conveyor plate; 17. First filter chamber; 18. Spiral fin; 19. Second filter chamber; 20. Second connecting groove; 21. Deformable part; 22. Cylindrical part; 23. Inclined section; 24. Fixing ring; 25. Straight section; 26. Floating ring; 27. Mounting arm; 28. Rolling part; 29. ​​Cooling chamber; 30. Upper feed port; 31. Lower feed port; 32. Stop pin. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1 to 14 This invention provides an automatic waste gas purification device for hot-dip galvanizing production, aiming to solve the problems of uneven heating of activated carbon adsorption beds, low adsorption efficiency, and safety hazards in existing technologies. The device includes a purification chamber 2, with an outlet 1 at the top and an inlet 7 at the bottom. A manhole (not shown in the figure) is provided on the lower side of the purification chamber 2 for easy inspection and maintenance. The inlet 7 is connected to the waste gas emission end of the hot-dip galvanizing production equipment via an inlet pipe. High-temperature waste gas containing organic pollutants generated during the hot-dip galvanizing process flows into the inlet 7 through the inlet pipe and then into the purification chamber 2.

[0021] Inside the purification chamber 2, a horizontally fixed partition 6 divides the interior of the purification chamber 2 into a lower air intake mixing zone and an upper purification zone. Multiple through-holes 10 are evenly distributed on the surface of the partition 6, serving as channels for exhaust gas to flow from the lower to the upper region. Multiple filter cartridges 4 arranged in an array are connected to the top of the partition 6. The filter cartridges 4 are designed with an open bottom, and multiple through-holes 5 are formed on their peripheral sidewalls. These through-holes 5 communicate with the interior of the filter cartridge 4 and also with the through-holes 10 on the partition 6, ensuring that exhaust gas can smoothly enter the interior of the filter cartridge 4.

[0022] The internal structure of the filter cartridge 4 is ingeniously designed, divided radially from the inside out into a cooling chamber 29, a first filter chamber 17, and a second filter chamber 19. The cross-sections of these three chambers are all annular, and they are concentrically distributed. Air vents 5 connect the cooling chamber 29, the first filter chamber 17, and the second filter chamber 19, allowing for heat exchange and filtration of the exhaust gas between the chambers.

[0023] To ensure the circulation and full utilization of activated carbon, the first filter chamber 17 has multiple upper feed ports 30 and lower feed ports 31 on its cylindrical wall. The upper feed ports 30 are located on the upper side of the cylindrical wall of the first filter chamber 17, and the lower feed ports 31 are located on the lower side of the cylindrical wall of the first filter chamber 17. Both the upper feed ports 30 and the lower feed ports 31 connect the first filter chamber 17 and the second filter chamber 19. Both the first filter chamber 17 and the second filter chamber 19 store an appropriate amount of activated carbon particles.

[0024] The waste gas treatment process is as follows: High-temperature waste gas first enters the air inlet area at the bottom of the filter cylinder 4 through the through hole 10, and then passes through the cooling chamber 29. Here, the waste gas undergoes sufficient heat exchange with the cooling components installed in the cooling chamber 29, and its temperature is reduced. The cooled waste gas then enters the first filter chamber 17 through the air hole 5, where it undergoes the first adsorption filtration using the activated carbon particles in the first filter chamber 17. Subsequently, the waste gas enters the second filter chamber 19 again through the air hole 5, where it undergoes a second deep purification by the activated carbon particles in the second filter chamber 19. Finally, the purified clean gas is discharged through the opening at the top of the filter cylinder 4 or through the air hole 5 on the upper side wall, collects at the top of the purification chamber 2, and is discharged from the air outlet 1.

[0025] To enhance the structural stability of the filter cartridge 4, a perforated frame 3 is fixedly installed inside the purification chamber 2. The perforated frame 3 has slots that match the position and number of filter cartridges 4. The upper end of the filter cartridge 4 passes through the slots, thereby obtaining stable support and reinforcement.

[0026] To address the problem of localized high temperatures easily generated inside the adsorption bed in existing technologies, this device incorporates a highly efficient cooling mechanism within the filter cartridge 4. Specifically, a cooling copper pipe 9 is threaded through the filter cartridge 4 and connected to an external condenser or refrigeration unit (not shown in the figure). The lower end of the cooling copper pipe 9 extends deep into the inner cavity of the cooling chamber 29. To significantly increase the heat exchange area, spiral fins 18 are fitted onto the portion of the cooling copper pipe 9 located within the cooling chamber 29. When high-temperature exhaust gas passes through the cooling chamber 29, the spiral fins 18 rapidly absorb the heat from the exhaust gas and discharge it through the cooling copper pipe 9. This ensures that the temperature of the exhaust gas entering the subsequent adsorption chamber remains within the optimal adsorption temperature range of the activated carbon, preventing desorption or deactivation of the activated carbon due to high temperatures.

[0027] One of the core innovations of this invention lies in achieving automatic circulation of activated carbon particles to avoid localized saturation and uneven heating. Please refer to... Figures 2 to 14 A rotating part 12 is coaxially provided at the open end of the filter cylinder 4. The rotating part 12 has a shaft-like structure and can rotate freely within the inner cavity of the filter cylinder 4. The outer diameter of the rotating part 12 is adapted to the inner diameter of the second filter cavity 19. Its main function is to seal the lower openings of the first filter cavity 17, the second filter cavity 19, and the cooling cavity 29, and also to control the opening and closing of the through holes 10 on the partition plate 6. The end face of the rotating part 12 has multiple through holes in the form of first connecting grooves 13. When the rotating part 12 rotates to a specific angle, the first connecting grooves 13 are connected to the through holes 10 on the partition plate 6, thereby allowing exhaust gas to pass through.

[0028] A first spiral conveyor plate 16 and a second spiral conveyor plate 15 are fixedly connected to the upper end face of the rotating part 12. Both are coaxial and employ a shaftless spiral plate structure. The first spiral conveyor plate 16 is installed inside the second filter chamber 19 and can rotate freely within it; the second spiral conveyor plate 15 is installed inside the first filter chamber 17 and can rotate freely within it. Specifically, the spiral directions of the first spiral conveyor plate 16 and the second spiral conveyor plate 15 are opposite (e.g., one is left-handed and the other is right-handed).

[0029] When the motor 8 drives the rotating part 12 to rotate circumferentially, it will drive the first spiral conveyor plate 16 and the second spiral conveyor plate 15 to rotate synchronously. Since the spiral directions are opposite, the conveying directions of the activated carbon particles are also opposite. The specific working process is as follows: when the second spiral conveyor plate 15 rotates, it conveys the activated carbon particles in the first filter chamber 17 from bottom to top; when the first spiral conveyor plate 16 rotates, it conveys the activated carbon particles in the second filter chamber 19 from top to bottom. The activated carbon particles conveyed to the top by the second spiral conveyor plate 15 fall into the upper part of the second filter chamber 19 through the upper feed port 30; while the activated carbon particles conveyed to the bottom by the first spiral conveyor plate 16 fall into the lower part of the first filter chamber 17 through the lower feed port 31. In this way, through the continuous rotation of the rotating part 12, the activated carbon particles in the first filter chamber 17 and the second filter chamber 19 form a counter-current closed-loop circulation system. This mechanism allows activated carbon particles near the air inlet side (where the temperature is relatively high) to be quickly removed and replaced with activated carbon at a lower temperature and with a stronger adsorption capacity. This avoids the temperature gradient problem present in the fixed bed and significantly improves the overall adsorption efficiency and the utilization rate of activated carbon.

[0030] To further optimize the transfer of activated carbon particles within the chamber, prevent clogging, and promote waste gas flow, this device incorporates a special vibration and loosening mechanism within the conveying system. Combined with... Figure 7 , Figure 11 and Figure 12 A floating ring 26 is fixedly connected to the upper end of the second spiral conveyor plate 15. The floating ring 26 is coaxially engaged within the first filter chamber 17 and can slide freely up and down within its cavity. A fixing ring 24 is coaxially fixed to the top wall of the inner cavity of the first filter chamber 17, and the fixing ring 24 is located above the floating ring 26. A plurality of mounting arms 27 arranged in an array along its axial direction are fixedly connected to the upper end of the floating ring 26, and the upper end of the mounting arms 27 is rotatably connected to a rolling part 28 (such as a roller or ball).

[0031] A special rolling groove is formed on the lower end face of the fixed ring 24. The two ends of the rolling groove along the circumference of the fixed ring 24 are a straight section 25 and an inclined section 23, respectively. When the rotating part 12 rotates, it drives the floating ring 26 to rotate synchronously, thereby causing the rolling part 28 to move along the lower end face of the fixed ring 24 and the rolling groove. The specific operation process is as follows: When the rolling part 28 rolls on the lower end face of the fixed ring 24, its position is relatively low. At this time, the floating ring 26 generates downward axial pressure on the second spiral conveying plate 15, causing the second spiral conveying plate 15 to undergo axial compression deformation. At this time, the second spiral conveying plate 15 accumulates elastic potential energy, and the activated carbon particles are stably conveyed in a relatively compact pitch.

[0032] When the rolling part 28 rolls to the position of the rolling groove, especially when it enters the side of the rolling groove near the straight section 25, the rolling part 28 is "lifted" due to the change in height of the straight section 25, or in other words, the spiral blades quickly release their compression. The elastic potential energy accumulated in the second spiral conveyor blade 15 is released instantaneously, causing its upper end (i.e., the connection point of the floating ring 26) to move upward rapidly. This rapid upward movement causes the pitch at the upper end of the second spiral conveyor blade 15 to increase instantaneously, producing a mechanical effect similar to "ejection" or "violent shaking". This effect has a dual purpose: on the one hand, it loosens the arrangement of activated carbon particles that are about to enter the second filter chamber 19 through the feed inlet 30, overcoming the resistance of gravity to the upward movement of the particles and ensuring that the particles fall smoothly into the second filter chamber 19; on the other hand, this rapid axial displacement generates strong disturbance and vibration on the activated carbon particle layer, which can break up dust that may agglomerate between particles, prevent the pores 5 from being blocked, and renew the adsorption surface of the particles. When the rolling part 28 rolls onto the inclined section 23, the rolling part 28 will move downward and axially compress the second spiral conveyor plate 15.

[0033] Furthermore, this invention also features temperature-based adaptive flow regulation. (Please refer to...) Figures 2 to 14 A cylindrical part 22 is coaxially fixed to the upper end face of the rotating part 12, and a rotating disk 14 is rotatably mounted on the periphery of the cylindrical part 22 via a bearing. The lower surface of the rotating disk 14 maintains sliding contact with the upper surface of the rotating part 12. Multiple second connecting grooves 20 are formed on the end face of the rotating disk 14, and these second connecting grooves 20 correspond one-to-one with the first connecting grooves 13 on the rotating part 12. By rotating the rotating disk 14 circumferentially relative to the rotating part 12, the overlapping area between the first connecting grooves 13 and the second connecting grooves 20 can be adjusted, thereby controlling the effective ventilation cross-sectional area of ​​the exhaust gas entering the inner cavity of the filter cartridge 4, i.e., adjusting the intake flow rate.

[0034] The power source driving the rotation of the rotating disk 14 comes from a temperature-sensitive deformation mechanism. A deformation element 21 is fixedly embedded in the cylindrical part 22. This deformation element 21 is made of shape memory alloy (such as nickel-titanium alloy) and has a preset thermal deformation threshold. When the heat received by the deformation element 21 reaches a certain threshold (i.e., when the exhaust temperature in the cooling chamber 29 is too high), its physical form will change significantly, specifically by bending or stretching deformation. Two stop pins 32 are fixedly connected to the end face of the rotating disk 14. The end of the deformation element 21 away from the cylindrical part 22 is engaged between these two stop pins 32, and its surface is in sliding contact with the surface of the stop pins 32.

[0035] The working principle is as follows: When the temperature of the organic waste gas entering the cooling chamber 29 is within the normal range, the deformable component 21 maintains its original shape, and the rotating disk 14 remains in its initial position. At this time, the overlapping area of ​​the first connecting groove 13 and the second connecting groove 20 is at its maximum, ensuring a high throughput for waste gas treatment. When the waste gas temperature rises abnormally and exceeds the threshold of the deformable component 21, the deformable component 21 undergoes bending deformation due to heat. During the deformation process, the deformable component 21 pushes or pulls the stop pin 32 in contact with it, causing the stop pin 32 to drive the rotating disk 14 to rotate around the axis of the cylindrical part 22. The rotation of the rotating disk 14 reduces the overlapping area of ​​the openings of the first connecting groove 13 and the second connecting groove 20, thereby automatically reducing the flow rate of waste gas entering the filter cartridge 4. This negative feedback mechanism effectively avoids overload of the activated carbon particles due to excessive waste gas volume or excessive temperature, protects the adsorption material, extends its service life, and ensures the purification effect.

[0036] The overall power of the device comes from the motor base 11 connected to the bottom of the partition 6, and the motor base 11 is equipped with a motor 8. The motor shaft of the motor 8 is driven by the rotating part 12. After the motor 8 is started, the rotation of the motor shaft synchronously drives the rotating part 12 to rotate, thereby driving all the linkage mechanisms such as the screw conveyor, vibration loosening and slot adjustment mentioned above to operate.

[0037] The working principle of this invention is summarized as follows: Organic waste gas generated during hot-dip galvanizing enters the bottom of purification chamber 2 through inlet 7. Under the pressure of the fan (not shown in the figure), the waste gas seeks a flow channel. At this time, motor 8 is in working condition, driving the rotating part 12 to rotate, so that the first connecting groove 13 and the second connecting groove 20 are aligned. The waste gas enters the inner cavity of filter cartridge 4 through through hole 10, first connecting groove 13 and second connecting groove 20. First, the high-temperature organic waste gas enters cooling chamber 29, where it comes into close contact with cooling copper pipe 9 and spiral fins 18. Cooling copper pipe 9 is filled with circulating cooling medium, which quickly removes the heat from the waste gas, significantly cooling the organic waste gas to a suitable adsorption temperature range.

[0038] Subsequently, the cooled exhaust gas diffuses through the vent 5 into the first filter chamber 17. Inside the first filter chamber 17, the exhaust gas comes into contact with activated carbon particles flowing upwards, propelled by the second spiral conveyor plate 15, and undergoes initial adsorption filtration. The exhaust gas, with most pollutants removed, continues through the vent 5 into the second filter chamber 19, where it undergoes a second deep adsorption purification with activated carbon particles flowing downwards, propelled by the first spiral conveyor plate 16. Finally, the purified gas is discharged from the filter cartridge 4.

[0039] During the purification process, the motor 8 continuously drives the rotating part 12 to rotate, causing the first spiral conveyor plate 16 and the second spiral conveyor plate 15 to rotate in opposite directions, driving the activated carbon particles in the two chambers to continuously circulate and convect. At the same time, the rolling part 28 on the floating ring 26 rolls periodically in the rolling groove of the fixed ring 24, causing the second spiral conveyor plate 15 to generate periodic axial extension, contraction and vibration, keeping the activated carbon particles in a loose state during the transfer process, avoiding bridging and clogging, and renewing the adsorption surface.

[0040] When encountering abnormal operating conditions, such as excessively high instantaneous exhaust gas temperature, the deformation component 21 located in the cooling chamber 29 senses that the temperature change has reached a threshold and generates mechanical deformation. The deformation component 21 moves the stop pin 32, thereby driving the rotating disk 14 to rotate. The rotating disk 14 and the rotating part 12 undergo relative angular displacement, resulting in a reduction in the overlapping flow area of ​​the first connecting groove 13 and the second connecting groove 20, automatically limiting the amount of exhaust gas entering, preventing the system from overheating, and realizing intelligent and automated safety protection.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic waste gas purification device for hot-dip galvanizing production, comprising a purification chamber (2), wherein the purification chamber (2) is respectively provided with an outlet (1) and an inlet (7), characterized in that, The purification chamber (2) is provided with a partition (6), and a filter cylinder (4) is connected to the partition (6). The inner cavity of the filter cylinder (4) is divided into a cooling chamber (29), a first filter chamber (17) and a second filter chamber (19) from the inside to the outside. The cooling chamber (29) is provided with a cooling component. The filter cylinder (4) is provided with a rotating part (12) that rotates inside. The rotating part (12) is provided with a spiral conveying mechanism that extends into the first filter chamber (17) and the second filter chamber (19). The spiral conveying mechanism drives the filter particles in the first filter chamber (17) to be conveyed upward and the filter particles in the second filter chamber (19) to be conveyed downward. The upper part of the first filter chamber (17) is connected to the upper part of the second filter chamber (19), and the lower part of the second filter chamber (19) is connected to the lower part of the first filter chamber (17) to form a countercurrent closed-loop circulation path for the filter particles.

2. The automatic waste gas purification device for hot-dip galvanizing production according to claim 1, characterized in that, The spiral conveying mechanism includes a first spiral conveying plate (16) and a second spiral conveying plate (15) coaxially fixed to the rotating part (12). The first spiral conveying plate (16) is disposed in the second filter cavity (19), and the second spiral conveying plate (15) is disposed in the first filter cavity (17). The spiral directions of the first spiral conveying plate (16) and the second spiral conveying plate (15) are opposite.

3. The automatic waste gas purification device for hot-dip galvanizing production according to claim 2, characterized in that, The upper part of the cylinder wall of the first filter chamber (17) is provided with an upper feed port (30) and a lower feed port (31), respectively. The upper feed port (30) and the lower feed port (31) connect the first filter chamber (17) and the second filter chamber (19). Multiple air holes (5) are provided on the cylindrical walls of the cooling chamber (29), the first filter chamber (17) and the second filter chamber (19), and the air holes (5) connect the cooling chamber (29), the first filter chamber (17) and the second filter chamber (19).

4. The automatic waste gas purification device for hot-dip galvanizing production according to claim 2, characterized in that, The upper end of the second spiral conveyor plate (15) is fixed with a floating ring (26), and the upper end of the floating ring (26) is provided with a mounting arm (27), and the upper end of the mounting arm (27) is rotatably connected with a rolling part (28). A fixed ring (24) is fixed to the top wall of the first filter chamber (17). The lower end face of the fixed ring (24) is provided with a rolling groove. The rolling part (28) rolls with the lower end face of the fixed ring (24) and the rolling groove. The two ends of the rolling groove along the circumferential direction are a straight section (25) and an inclined section (23), so that when the rolling part (28) moves to different positions, it drives the second spiral conveyor plate (15) to produce axial elastic deformation and release.

5. The automatic waste gas purification device for hot-dip galvanizing production according to claim 1, characterized in that, The rotating part (12) is provided with a first connecting groove (13), and the partition plate (6) is provided with a through hole (10). The first connecting groove (13) and the through hole (10) are positioned opposite each other. The rotating part (12) is also provided with a rotating disk (14) that rotates coaxially. The rotating disk (14) is provided with a second connecting groove (20). The rotating disk (14) can adjust the overlapping area of ​​the first connecting groove (13) and the second connecting groove (20) by rotating relative to the rotating part (12). The purification chamber (2) is provided with a motor (8) for driving the rotating part (12) to rotate.

6. The automatic waste gas purification device for hot-dip galvanizing production according to claim 5, characterized in that, A cylindrical part (22) is coaxially fixed to the rotating part (12), and the rotating disk (14) is rotatably mounted on the cylindrical part (22); The cylindrical part (22) is fitted with a deformable part (21) that can deform when heated. Two stop pins (32) are fixed to the end face of the rotating disk (14). The movable end of the deformable part (21) is engaged between the two stop pins (32) and slides in contact with them.

7. The automatic waste gas purification device for hot-dip galvanizing production according to claim 6, characterized in that, The deformable part (21) is made of shape memory alloy. When the deformable part (21) is heated to a preset threshold, it will bend or stretch and deform, so as to rotate the rotating disk (14) by the stop pin (32).

8. The automatic waste gas purification device for hot-dip galvanizing production according to claim 1, characterized in that, The cooling assembly includes a cooling copper tube (9) passing through the filter cylinder (4), the lower end of the cooling copper tube (9) extending into the cooling chamber (29), and the portion of the cooling copper tube (9) located in the cooling chamber (29) is fitted with spiral fins (18).

9. The automatic waste gas purification device for hot-dip galvanizing production according to claim 1, characterized in that, The cross-sections of the cooling chamber (29), the first filter chamber (17), and the second filter chamber (19) are all annular and concentrically distributed. The rotating part (12) is coaxially disposed at the lower opening of the filter cylinder (4). The outer diameter of the rotating part (12) is adapted to the inner diameter of the second filter chamber (19) to close the lower openings of the first filter chamber (17), the second filter chamber (19), and the cooling chamber (29).

10. The automatic waste gas purification device for hot-dip galvanizing production according to claim 1, characterized in that, A hollow frame (3) is fixedly installed in the inner cavity of the purification chamber (2). A slot is provided on the hollow frame (3), and the upper end of the filter cylinder (4) is engaged in the slot.

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