Asphalt flue gas purification device

Abstract

The invention relates to the technical field of flue gas purification, in particular to an asphalt flue gas purification device which comprises a purification tank, a first mounting box is fixedly mounted on the bottom side of the purification tank, and a gas inlet pipeline is fixedly mounted on the side face of the first mounting box. A drainage structure for guiding airflow upwards and collecting liquid is arranged in the first mounting box, a gas capturing chamber is arranged in the purification tank, and the gas capturing chamber is formed by sequentially and fixedly connecting a first adsorption chamber, a second adsorption chamber and a third adsorption chamber from bottom to top; a second guide ring fixedly connected with the inner side of the purification tank is fixedly mounted at an opening in the lower end of the first adsorption chamber. Liquid drops formed through condensation flow downwards along the inner wall of the gas capturing chamber into a water accumulating cavity defined by the first guide block and the first mounting box and are intensively discharged through the drainage pipe, the structure effectively separates gas and liquid phases, equipment corrosion or airflow disturbance caused by liquid retention is prevented, and it is guaranteed that the purification process is continuous and stable.

Description

Technical Field

[0001] This invention relates to the field of flue gas purification technology, and in particular to an asphalt flue gas purification device. Background Technology

[0002] Asphalt fumes are harmful gases produced during the production, processing, and paving of asphalt. Their complex composition includes various volatile organic compounds, particulate matter, and heavy metal compounds, posing serious threats to the environment and human health. Heavy metals, such as lead, chromium, and cadmium, are particularly toxic and bioaccumulative, making them difficult to degrade naturally. Traditional purification methods are often inefficient, energy-intensive, and ineffective at capturing heavy metals. Existing purification devices mostly employ single adsorption or water washing methods, resulting in incomplete purification, equipment clogging, and difficulties in cleaning and maintenance, failing to meet continuous operation and environmental emission requirements. Therefore, there is an urgent need for an integrated device capable of efficiently purifying asphalt fumes, especially for the specialized adsorption of heavy metal components, and possessing self-cleaning capabilities. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides an asphalt fume purification device.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A purification tank is included, a first mounting box is fixedly installed on the bottom side of the purification tank, an air inlet pipe is fixedly installed on the side of the first mounting box, and a flow guiding structure for guiding airflow upwards and collecting liquid is provided inside the first mounting box. A gas capture chamber is provided inside the purification tank, consisting of a first adsorption chamber, a second adsorption chamber, and a third adsorption chamber fixedly connected sequentially from bottom to top. A second guide ring is fixedly installed at the lower opening of the first adsorption chamber and fixedly connected to the inner side of the purification tank. Flow channels are equidistantly opened on the upper side of the third adsorption chamber, and a first guide ring is fixedly installed on the upper side of the third adsorption chamber corresponding to the periphery of the flow channels. A movable rod is provided inside the purification tank, surrounding a hollow pipe with an upper opening, and the side of the movable rod facing... Spray pipes are installed inside the first, second, and third adsorption chambers. Cleaning structures are installed on the sides of the movable rod corresponding to the positions of the first, second, and third adsorption chambers. Liquid outlet holes are equidistantly opened on the sides of the movable rod. Fixed sealing structures are installed on the sides of the first, second, and third adsorption chambers corresponding to the positions of the liquid outlet holes. A second mounting box is fixedly installed at the upper position inside the purification tank. Air outlet holes are opened on the sides of the second mounting box. Air outlet pipes that are interconnected inside the air outlet holes are fixedly installed on the sides of the purification tank. Several dust collection bags are installed on the bottom side of the second mounting box. Support scraping structures that move with the movable rod are installed on the outside of the dust collection bags. A liquid inlet pipe is connected to the upper end of the movable rod. A drainage pipe is installed on the side of the first mounting box corresponding to the position of the drainage structure.

[0005] As a preferred embodiment of the present invention, the drainage structure includes two first guide blocks fixedly installed inside the first mounting box. The first guide blocks are arc-shaped blocks, and the two first guide blocks are mirror-distributed. A second guide block is fixedly installed on the upper side of each of the two first guide blocks. A blocking block is fixedly installed on the inner side of the first mounting box above the two second guide blocks. The blocking block is an inverted "U"-shaped block.

[0006] As a preferred embodiment of the present invention, the cleaning structure includes scrapers disposed inside the first adsorption chamber, the second adsorption chamber, and the third adsorption chamber. A first sliding ring is slidably installed on the side of the movable rod corresponding to the position of each scraper. A first groove is formed on the side of the movable rod corresponding to the position of the first sliding ring. The first groove has an "L"-shaped groove in cross section. A second connecting rod is slidably installed inside the first sliding ring by a spring. One end of the second connecting rod extends into the inside of the first groove. The side of the second connecting rod away from the first sliding ring is fixedly installed on the side of the second connecting rod.

[0007] As a preferred embodiment of the present invention, the sealing structure includes a plugging ring slidably installed on the outside of the movable rod at the position corresponding to the liquid outlet hole, a connecting block fixedly installed on the outside of the plugging ring, and three connecting blocks respectively fixedly installed on the inner side of the first adsorption chamber, the second adsorption chamber and the third adsorption chamber on the side away from the plugging ring.

[0008] As a preferred embodiment of the present invention, the supporting scraping structure includes adapter rings equidistantly arranged on the outside of the dust collection bag. Several adapter rings are fixedly connected to each other by two symmetrically distributed first mounting brackets. A movable ring is rotatably installed on the outside of the movable rod. Several third connecting rods are fixedly installed equidistantly on the outside of the movable ring. The side of the third connecting rod away from the movable ring is fixedly installed on the side of one of the first mounting brackets. A sliding second sliding ring is provided on the inside of the purification tank. The inside of the second sliding ring is fixedly installed on the side of another first mounting bracket.

[0009] As a preferred embodiment of the present invention, two second sliding grooves are provided on the inner side of the purification tank, and a slider is fixedly installed on the outer side of the second sliding ring corresponding to the position of the second sliding groove, and the slider is slidably installed on the inner side of the second sliding groove.

[0010] As a preferred embodiment of the present invention, the upper end of the movable rod extends upward to the top of the purification tank. A second mounting bracket is fixedly installed on the upper side of the purification tank. A telescopic device is fixedly installed on the side of the second mounting bracket. A mounting seat is fixedly installed on the side of the telescopic device. The mounting seat is rotatably installed on the upper end of the movable rod. An external spline groove is opened on the outer side of the movable rod. An internal spline tooth is movably installed on the external spline groove. A third mounting bracket supporting the internal spline tooth is movably installed below the internal spline tooth. A fixing block is fixedly installed on the upper side of the purification tank. A servo motor is fixedly installed on the side of the fixing block. An adapter tooth with mutual meshing of the internal spline tooth is fixedly installed at the output end of the servo motor.

[0011] As a preferred embodiment of the present invention, the first adsorption chamber, the second adsorption chamber, and the third adsorption chamber are all hollow flat spheres. The first adsorption chamber and the second adsorption chamber are connected by a circular pipe, and the second adsorption chamber and the third adsorption chamber are connected by a circular pipe.

[0012] As a preferred embodiment of the present invention, a fixed buffer block is provided at the center of the interior of both the second and third adsorption chambers. The buffer block is spherical. First connecting rods are installed at equal intervals on the bottom sides of both first adsorption chambers. The side of the first connecting rod away from the first adsorption chamber is connected to the side of the second and third adsorption chambers respectively.

[0013] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. This invention achieves effective airflow guidance and efficient liquid collection through the cooperation of a diversion structure (including a first guide block, a second guide block, and a shielding block) and a gas capture chamber. After the asphalt fumes enter the first mounting box from the inlet pipe, they are guided upward into the gas capture chamber through the arc-shaped channel formed by the first and second guide blocks, avoiding airflow short-circuiting. At the same time, the condensed droplets flow down the inner wall of the gas capture chamber to the water accumulation cavity formed by the first guide block and the first mounting box, and are discharged through the diversion pipe. This structure effectively separates the gas and liquid phases, prevents liquid retention from causing equipment corrosion or airflow disturbance, and ensures a continuous and stable purification process.

[0014] 2. This invention achieves automatic cleaning and droplet aggregation of the inner wall of the gas capture chamber by coordinating the cleaning structure (including a scraper, a first sliding ring, a second connecting rod, and a first sliding groove) with the rotation and up-and-down movement of the movable rod. This enhances the purification effect and reduces maintenance requirements. When the movable rod rotates, it drives the scraper to scrape along the inner wall of the gas capture chamber, causing small droplets to aggregate into larger droplets and flow down more quickly, avoiding the accumulation of liquid film that affects adsorption efficiency. When the movable rod moves down, the first sliding ring slides along the inclined surface of the first sliding groove, pushing the scraper to scrape against the inner wall. Combined with the spraying of cleaning fluid, residual pollutants are thoroughly removed. This linkage design ensures continuous cleaning of the inner wall.

[0015] 3. This invention achieves seamless switching between purification and cleaning modes through the cooperation of the liquid outlet and the sealing structure (including the plugging ring and the connecting block), optimizing resource utilization and extending the life of the device. In purification mode, the plugging ring seals the liquid outlet, and the chelating agent mixture is sprayed out only through the spray pipe, forming a fine water curtain to capture heavy metals in the flue gas. In cleaning mode, the movable rod moves down to disengage the liquid outlet from the plugging ring, and the cleaning liquid is sprayed out in the form of a jet, which, together with the rotating scraper, thoroughly cleans the inner wall. This structure has an automatic switching function through mechanical linkage, which does not require stopping the machine for disassembly, significantly improving the ease of operation and the durability of the equipment.

[0016] 4. This invention achieves stable support and surface cleaning of the dust collector bag through the cooperation of the supporting scraping structure (including an adapter ring, a first mounting bracket, a movable ring, a third connecting rod, and a second sliding ring) and the dust collector bag, ensuring the filtration effect. The adapter ring and the first mounting bracket form a rigid frame to support the dust collector bag, avoiding wrinkles and deformation caused by flue gas impact and ensuring uniform airflow distribution. During cleaning, the movable rod moves down, causing the adapter ring to slide down along the surface of the dust collector bag to scrape off the attached particles. At the same time, the reverse airflow fills the dust collector bag to enhance the dust removal effect. This design effectively maintains the permeability and filtration efficiency of the dust collector bag, reduces pressure fluctuations, and extends the service life of the filter bag.

[0017] 5. This invention achieves precise control of rotation and axial movement through the linkage between the drive structure (including telescopic device, servo motor, adapter gear and external spline groove) and the movable rod, ensuring multi-structure collaborative operation and functional integration. The servo motor drives the movable rod to rotate through the meshing of the adapter gear and the internal spline gear, causing the spray pipe and cleaning structure to act evenly. The telescopic device pushes the movable rod to move axially, triggering the switching of cleaning mode and scraping cleaning operation. This integrated drive solution simplifies the transmission structure and improves the coordination of actions and the accuracy of response. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the second mounting bracket structure of the present invention; Figure 3 This is a schematic diagram of the second mounting box structure of the present invention; Figure 4 This is a schematic diagram of the adapter ring structure of the present invention; Figure 5 This is a side sectional view of the purification tank of the present invention; Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point A in the middle; Figure 7 For the present invention Figure 5 Enlarged schematic diagram of the structure at point B; Figure 8 For the present invention Figure 5 Enlarged schematic diagram of the structure at point C; Figure 9 This is a schematic diagram of the scraper structure of the present invention.

[0019] Wherein: 111, purification tank; 112, first mounting box; 113, air inlet pipe; 211, first guide block; 212, second guide block; 213, shielding block; 214, drainage pipe; 311, first adsorption chamber; 312, second adsorption chamber; 313, third adsorption chamber; 314, second guide ring; 315, first guide ring; 316, drainage groove; 321, movable rod; 331, buffer block; 332, first connecting rod; 341, first sliding groove; 342, first sliding ring; 343, second connecting rod; 344, scraper; 351, liquid outlet hole; 35 2. Plug ring; 353. Connecting block; 361. Spray pipe; 411. Second mounting box; 412. Air outlet; 413. Dust bag; 421. Second sliding ring; 422. First mounting bracket; 423. Adapter ring; 424. Movable ring; 425. Third connecting rod; 431. Second sliding groove; 432. Slider; 433. Air outlet pipe; 511. Second mounting bracket; 512. Expansion joint; 513. Mounting base; 521. External spline groove; 522. Internal spline teeth; 523. Third mounting bracket; 524. Fixing block; 525. Servo motor; 526. Adapter teeth. Detailed Implementation

[0020] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0021] Example: Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, an asphalt fume purification device includes a purification tank 111. A first mounting box 112 is fixedly installed on the bottom side of the purification tank 111. An air inlet pipe 113 is fixedly installed on the side of the first mounting box 112. The interior of the first mounting box 112 is provided with a flow guiding structure for guiding the airflow upward and collecting liquid. The flow guiding structure includes two first guide blocks 211 fixedly installed inside the first mounting box 112. The first guide blocks 211 are arc-shaped blocks, and the two first guide blocks 211 are mirror-distributed. A second guide block 212 is fixedly installed on the upper side of each of the two first guide blocks 211. A blocking block 21 is fixedly installed on the inner side of the first mounting box 112 above the two second guide blocks 212. 3. The shielding block 213 is an inverted "U" shaped block. The purification tank 111 has a gas capture chamber inside, which is formed by a first adsorption chamber 311, a second adsorption chamber 312, and a third adsorption chamber 313 connected sequentially from bottom to top. A second guide ring 314 is fixedly installed at the lower opening of the first adsorption chamber 311 and is fixedly connected to the inner side of the purification tank 111. Drainage grooves 316 are equidistantly opened on the upper side of the third adsorption chamber 313. A first guide ring 315 is fixedly installed on the upper side of the third adsorption chamber 313 corresponding to the outer periphery of the drainage grooves 316. A movable rod 321 is installed inside the purification tank 111. The movable rod 321 is a hollow pipe with an open upper end. The side of the movable rod 321 corresponds to the first adsorption chamber 312. Spray pipes 361 are installed inside the first adsorption chamber 311, the second adsorption chamber 312, and the third adsorption chamber 313. Cleaning structures are installed on the side of the movable rod 321 corresponding to the positions of the first adsorption chamber 311, the second adsorption chamber 312, and the third adsorption chamber 313. Liquid outlet holes 351 are equidistantly opened on the side of the movable rod 321. Fixed sealing structures are installed on the side of the first adsorption chamber 311, the second adsorption chamber 312, and the third adsorption chamber 313 corresponding to the positions of the liquid outlet holes 351. A second mounting box 411 is fixedly installed at the upper position inside the purification tank 111. An air outlet 412 is opened on the side of the second mounting box 411. The air outlets 412 are fixedly installed on the side of the purification tank 111, and their internal interconnections are... The bottom side of the air pipe 433 and the second mounting box 411 is provided with several dust bags 413. The outer side of the dust bags 413 is provided with a support scraping structure that moves with the movable rod 321. The upper end of the movable rod 321 is connected to the liquid inlet pipe. The side of the first mounting box 112 is provided with a drainage pipe 214 corresponding to the position of the drainage structure. The center of the second adsorption chamber 312 and the third adsorption chamber 313 are both provided with fixed buffer blocks 331. The buffer blocks 331 are spherical. The bottom sides of the two first adsorption chambers 311 are equidistantly provided with first connecting rods 332. The side of the first connecting rods 332 away from the first adsorption chamber 311 is connected to the side of the second adsorption chamber 312 and the third adsorption chamber 313 respectively. More specifically, asphalt fumes enter the interior of the first mounting box 112 through the air inlet pipe 113. The asphalt fumes flow upwards through the drainage structure inside the first mounting box 112, simultaneously mixing with water and a chelating agent, which is then injected through the upper opening of the movable rod 321. The water and chelating agent are sprayed out through the spray pipe 361, forming a small water mist. The movable rod 321 rotates the spray pipe 361, causing the water mist to diffuse throughout the gas capture chamber and combine with the asphalt fumes. The chelating agent adsorbs the heavy metals within the asphalt fumes, and the asphalt fumes... After the water mist combines, it forms large water droplets on the inner wall of the gas capture chamber, which flow downwards. When the movable rod 321 rotates, it causes the cleaning structure to contact the inner wall of the gas capture chamber, causing the small water droplets inside the chamber to gather and form larger droplets that flow. The asphalt fumes continue to flow upwards through the gas capture chamber and undergo final filtration through the dust bag 413. At this point, the supporting scraping structure first supports the dust bag 413 to prevent the fumes from blowing it away, causing wrinkles and affecting airflow. The asphalt fumes then move downwards. When the movable rod 321 moves downward, it causes the supporting scraping structure to move downward on the outside of the dust bag 413, carrying away the dust on the outside of the dust bag 413. Simultaneously, as the movable rod 321 moves downward, the liquid outlet 351 disengages from the inside of the sealing structure, injecting cleaning fluid into the upper end of the movable rod 321. The cleaning fluid is sprayed out in a water-like flow through the liquid outlet 351. The cleaning fluid rotates with the movable rod 321, cleaning the inner wall of the gas capture chamber through the cleaning structure. The liquid flows into the inside of the drainage structure for collection and then flows through the drainage pipe 214. The gas is discharged and dispersed into the second adsorption chamber 312 and the third adsorption chamber 313 by the buffer block 331 to change the flow path of the gas, so that the gas comes into contact with the mist. The side of the first guide block 211 and the second guide block 212 that are close to each other and the inner side of the first mounting box 112 form a flow channel through which the asphalt smoke flows upward. The first guide block 211, the second guide block 212 and the inner side of the first mounting box 112 form a water accumulation cavity. Large water droplets flow down the wall of the gas capture chamber into the interior of the water accumulation cavity for collection. like Figure 1 and Figure 2As shown, specifically, the upper end of the movable rod 321 extends upward to the top of the purification tank 111. A second mounting bracket 511 is fixedly installed on the upper side of the purification tank 111. A telescopic device 512 is fixedly installed on the side of the second mounting bracket 511. A mounting base 513 is fixedly installed on the side of the telescopic device 512. The mounting base 513 is rotatably installed on the upper end of the movable rod 321. An external spline groove 521 is opened on the outer side of the movable rod 321. An internal spline tooth 522 is movably installed on the external spline groove 521. A third mounting bracket 523 supporting the internal spline tooth 522 is movably installed below the internal spline tooth 522. A fixing block 524 is fixedly installed on the upper side of the purification tank 111. A servo motor 525 is fixedly installed on the side of the fixing block 524. An adapter tooth 526 that meshes with the internal spline tooth 522 is fixedly installed at the output end of the servo motor 525. More specifically, the servo motor 525 drives the adapter tooth 526 to rotate, the adapter tooth 526 meshes with the internal spline tooth 522 to drive the internal spline tooth 522 to rotate, the internal spline tooth 522 meshes with the movable rod 321 through the external spline groove 521 to drive the movable rod 321 to rotate, the telescopic device 512 drives the mounting base 513 to move up and down, and the mounting base 513 drives the movable rod 321 to move up and down; like Figure 5 As shown, specifically, the first adsorption chamber 311, the second adsorption chamber 312, and the third adsorption chamber 313 are all hollow flat spheres. The first adsorption chamber 311 and the second adsorption chamber 312 are connected by a circular pipe, and the second adsorption chamber 312 and the third adsorption chamber 313 are connected by a circular pipe. More specifically, the shapes of the first adsorption chamber 311, the second adsorption chamber 312, and the third adsorption chamber 313 are used to increase the contact between the asphalt fume and the inner walls of the first adsorption chamber 311, the second adsorption chamber 312, and the third adsorption chamber 313. like Figure 9 As shown, specifically, the cleaning structure includes scrapers 344 disposed inside the first adsorption chamber 311, the second adsorption chamber 312, and the third adsorption chamber 313. A first sliding ring 342 is slidably installed on the side of the movable rod 321 corresponding to the position of each scraper 344. A first groove 341 is opened on the side of the movable rod 321 corresponding to the position of the first sliding ring 342. The first groove 341 has an "L"-shaped groove in cross section. A second connecting rod 343 is slidably installed inside the first sliding ring 342 through the spring. One end of the second connecting rod 343 extends into the inside of the first groove 341. The side of the second connecting rod 343 away from the first sliding ring 342 is fixedly installed on the side of the second connecting rod 343. More specifically, the movable rod 321 drives the first sliding ring 342 to rotate, the first sliding ring 342 drives the second connecting rod 343 to rotate, the second connecting rod 343 drives the scraper 344 to rotate, and the scraper 344 contacts the inner wall of the gas capture chamber, causing the small water droplets attached to the inner wall of the gas capture chamber to flow. When the movable rod 321 moves downward, the first sliding ring 342 slides on the movable rod 321 accordingly, causing the second connecting rod 343 to slide on the inclined surface of the first slide groove 341, so that the second connecting rod 343 drives the scraper 344 to squeeze and scrape the inner wall of the gas capture chamber, which, together with the cleaning fluid, cleans the inner wall of the gas capture chamber. like Figure 9 As shown, specifically, the sealing structure includes a plugging ring 352 that is slidably installed on the outside of the movable rod 321 at the position corresponding to the liquid outlet 351. A connecting block 353 is fixedly installed on the outside of the plugging ring 352. The three connecting blocks 353 are respectively fixedly installed on the inner side of the first adsorption chamber 311, the second adsorption chamber 312 and the third adsorption chamber 313 on the side away from the plugging ring 352. More specifically, in the initial position, the outlet of the liquid outlet 351 is blocked by the blocking ring 352, so that the mixture of water and chelating agent can only be sprayed out through the spray pipe 361 to form a water mist. When the movable rod 321 moves downward, the movable rod 321 drives the liquid outlet 351 to move below the blocking ring 352. Then, cleaning liquid is poured into the upper end of the movable rod 321 so that the cleaning liquid is sprayed out through the rotating liquid outlet 351 to rinse the inside of the gas capture chamber. like Figure 4 and Figure 5 As shown, specifically, the supporting scraping structure includes adapter rings 423 equidistantly arranged on the outside of the dust bag 413. Several adapter rings 423 are fixedly connected by two symmetrically distributed first mounting brackets 422. An active ring 424 is rotatably installed on the outside of the active rod 321. Several third connecting rods 425 are fixedly installed on the outside of the active ring 424 at equal intervals. The side of the third connecting rod 425 away from the active ring 424 is fixedly installed on the side of a first mounting bracket 422. A sliding second sliding ring 421 is provided on the inside of the purification tank 111. The inside of the second sliding ring 421 is fixedly installed on the side of another first mounting bracket 422. Two second sliding grooves 431 are opened on the inside of the purification tank 111. A slider 432 is fixedly installed on the outside of the second sliding ring 421 corresponding to the position of the second sliding groove 431. The slider 432 is slidably installed on the inside of the second sliding groove 431. More specifically, when the movable ring 424 is in its initial position, it supports the dust bag 413 through the first mounting bracket 422 and the adapter ring 423. When cleaning is required, air is blown into the second mounting box 411 through the air outlet pipe 433. The gas moves through the dust bag 413 into the purification tank 111, filling the dust bag 413. Then, the movable rod 321 is moved, which drives the first mounting bracket 422 to move downward. The first mounting bracket 422 drives the third connecting rod 425 to move downward. The third connecting rod 425 drives the adapter ring 423 and the first mounting bracket 422 to move downward. The adapter ring 423 moves downward close to the outside of the dust bag 413 to scrape away the dust on the outside of the dust bag 413 and clean the dust bag 413. The second sliding ring 421 slides up and down inside the purification tank 111 through the slider 432 and the second sliding groove 431.

[0022] Working principle: I. Purification Mode: Flue Gas Introduction and Initial Diversion Asphalt fumes enter the first mounting box through the air intake pipe. Guided by the flow-guiding structure, the fumes flow upward. Specifically, the fumes impact two mirror-distributed arc-shaped first guide blocks, forcing them to change direction and flow upward along the channel formed by the first guide block, the second guide block, and the inner wall of the first mounting box. Finally, they enter the purification tank above through the central area of ​​the shielding block. This design avoids direct fumes flow and achieves pre-distribution of airflow.

[0023] Spraying water mist: At the same time, a mixture of water and chelating agent is injected from the inlet at the top of the movable rod. The mixture flows through the inside of the movable rod and is sprayed out from the spray pipe. Since the servo motor meshes with the internal spline teeth through the adapter teeth, it drives the movable rod with the external spline groove to rotate continuously. Therefore, the droplets sprayed out of the spray pipe form a rotating water mist curtain covering the entire cross-section of the gas capture chamber (composed of the first adsorption chamber, the second adsorption chamber, and the third adsorption chamber).

[0024] Sufficient gas-liquid contact: The upward-flowing asphalt fumes and the rotating, falling water mist are in full counter-current contact, and pollutants such as tar particles and dust in the fumes are captured by the water mist; the chelating agent in the mixture can specifically capture and adsorb heavy metal ions in the fumes, forming stable compounds.

[0025] Changing the flow field and enhancing contact: The flue gas passes through three hollow, flattened spherical adsorption chambers in sequence. The buffer blocks inside the adsorption chambers block and diffuse the rising airflow, forcing the flue gas to change direction, bypass it, and come into contact with more water mist. This greatly increases the gas-liquid contact area and time, thereby improving the purification efficiency.

[0026] Droplet aggregation and collection: Large droplets formed after gas-liquid combination adhere to the inner wall of the gas capture chamber due to gravity. The rotating movable rod drives the cleaning structure on it to rotate synchronously. The scraper makes slight contact with the inner wall of the adsorption chamber, scraping and aggregating the attached small droplets into larger droplets, accelerating their downward flow. The droplets eventually flow back to the first mounting box along the inner wall and are collected in the "water accumulation chamber" formed by the first guide block and other structures. They are then discharged from the system through the drainage pipe, realizing the continuous separation and collection of waste liquid.

[0027] Final filtration: After being washed and adsorbed by water, the flue gas continues to rise and enters the second mounting box area at the top of the device. The flue gas must pass through several dust collection bags before it can be discharged from the outlet through the outlet pipe. During this process, the fine particulate matter remaining in the flue gas is intercepted by the dust collection bags. At this time, the frame composed of the adapter ring and the first mounting bracket supports the dust collection bags from the outside, preventing the flue gas flow from blowing them flat or creating wrinkles, thereby maintaining the maximum effective filtration area and low system resistance, ensuring smooth airflow.

[0028] II. Cleaning Mode (Intermittent Operation) This mode is activated when the device needs cleaning after running for a period of time.

[0029] Switching the cleaning fluid path: The telescopic device is activated, pushing the mounting base and the connected movable rod downward as a whole. When the movable rod moves downward, the liquid outlet on its side disengages from the sealing structure (i.e., the fixed plug ring). At this time, the injection of chelating agent mixture is stopped, and the cleaning fluid is injected into the movable rod instead. The cleaning fluid is no longer sprayed from the small spray pipe, but is sprayed out in the form of water flow from the exposed liquid outlet with a larger diameter.

[0030] Enhanced cleaning of the inner wall: The movable rod continues to rotate under the drive and moves downward. At the same time, due to the interaction between the first sliding ring and the "L"-shaped inclined structure of the first sliding groove, the second connecting rod and scraper are pushed to press against the inner wall of the gas capture chamber. The rotating scraper, in conjunction with the high-pressure water flow (sprayed from the liquid outlet), forcibly scrapes and washes the inner wall of the adsorption chamber, thoroughly removing stubborn asphalt oil stains and deposits attached to the inner wall. The flushed wastewater flows downward into the water collection chamber of the first mounting box and is discharged through the drainage pipe.

[0031] Cleaning the dust bag: While cleaning the gas capture chamber, the dust bag can also be cleaned. Compressed air or gas is blown in reverse through the exhaust pipe to make the dust bag slightly expand. Then, the downward movement of the movable rod drives the entire support scraping structure (adapter ring and first mounting bracket) to slide down along the second slide groove through the movable ring and the third connecting rod. The downward-moving adapter ring acts like a scraper, scraping off the dust attached to the outer surface of the dust bag. The scraped-off dust is discharged from the bottom, thereby restoring the air permeability of the dust bag.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An asphalt fume purification device, comprising a purification tank (111), a first mounting box (112) fixedly installed on the bottom side of the purification tank (111), and an air inlet pipe (113) fixedly installed on the side of the first mounting box (112), characterized in that, The first mounting box (112) is equipped with a flow guiding structure for upward airflow and liquid collection. The purification tank (111) is equipped with a gas capture chamber, which is formed by a first adsorption chamber (311), a second adsorption chamber (312), and a third adsorption chamber (313) connected sequentially from bottom to top. The upper side of the third adsorption chamber (313) is provided with equidistant flow channels (316). The purification tank (111) is equipped with a movable rod (321). The sides of the movable rod (321) are equipped with spray pipes (361) corresponding to the interiors of the first adsorption chamber (311), the second adsorption chamber (312), and the third adsorption chamber (313). The sides of the movable rod (321) are equipped with cleaning structures corresponding to the positions of the first adsorption chamber (311), the second adsorption chamber (312), and the third adsorption chamber (313). The side of the first adsorption chamber (311), the second adsorption chamber (312), and the third adsorption chamber (313) are provided with fixed sealing structures at the positions corresponding to the liquid outlets (351). The second mounting box (411) is fixedly installed at the upper position inside the purification tank (111). The side of the second mounting box (411) is provided with an air outlet (412). The side of the purification tank (111) is fixedly installed with an air outlet pipe (433) that is interconnected inside the air outlet (412). Several dust bags (413) are provided on the bottom side of the second mounting box (411). The outer side of the dust bags (413) is provided with a support scraping structure that moves with the movable rod (321). The upper end of the movable rod (321) is connected to the liquid inlet pipe. The side of the first mounting box (112) is provided with a drainage pipe (214) at the position corresponding to the drainage structure.

2. The asphalt fume purification device according to claim 1, characterized in that, The drainage structure includes two first guide blocks (211) fixedly installed inside the first mounting box (112). The first guide blocks (211) are arc-shaped blocks. The two first guide blocks (211) are mirror-distributed. A second guide block (212) is fixedly installed on the upper side of each of the two first guide blocks (211). A shielding block (213) is fixedly installed on the inner side of the first mounting box (112) above the two second guide blocks (212). The shielding block (213) is an inverted "U"-shaped block. The movable rod (321) is a hollow pipe with an opening at the upper end. A second guide ring (314) is fixedly installed at the lower opening of the first adsorption chamber (311) and is fixedly connected to the inner side of the purification tank (111). A first guide ring (315) is fixedly installed on the upper side of the third adsorption chamber (313) around the drainage groove (316).

3. The asphalt fume purification device according to claim 2, characterized in that, The cleaning structure includes scrapers (344) disposed inside the first adsorption chamber (311), the second adsorption chamber (312), and the third adsorption chamber (313). A first sliding ring (342) is slidably installed on the side of the movable rod (321) corresponding to the position of each scraper (344). A first groove (341) is opened on the side of the movable rod (321) corresponding to the position of the first sliding ring (342). The first groove (341) has an "L" shaped groove in cross section. A second connecting rod (343) is slidably installed inside the first sliding ring (342) through the first sliding ring (342) by a spring. One end of the second connecting rod (343) extends into the inside of the first groove (341). The side of the second connecting rod (343) away from the first sliding ring (342) is fixedly installed on the side of the second connecting rod (343).

4. The asphalt fume purification device according to claim 3, characterized in that, The sealing structure includes a plugging ring (352) that is slidably installed on the outside of the movable rod (321) at the position corresponding to the liquid outlet (351). A connecting block (353) is fixedly installed on the outside of the plugging ring (352). The three connecting blocks (353) are fixedly installed on the inside of the first adsorption chamber (311), the second adsorption chamber (312), and the third adsorption chamber (313) respectively on the side away from the plugging ring (352).

5. The asphalt fume purification device according to claim 4, characterized in that, The supporting scraping structure includes adapter rings (423) equidistantly arranged on the outside of the dust bag (413). Several adapter rings (423) are fixedly connected by two symmetrically distributed first mounting brackets (422). A movable ring (424) is rotatably installed on the outside of the movable rod (321). Several third connecting rods (425) are fixedly installed on the outside of the movable ring (424) at equal intervals. The side of the third connecting rod (425) away from the movable ring (424) is fixedly installed on the side of a first mounting bracket (422). A sliding second sliding ring (421) is provided on the inside of the purification tank (111). The inside of the second sliding ring (421) is fixedly installed on the side of another first mounting bracket (422).

6. The asphalt fume purification device according to claim 5, characterized in that, The purification tank (111) has two second slide grooves (431) on its inner side. A slider (432) is fixedly installed on the outer side of the second sliding ring (421) corresponding to the position of the second slide groove (431). The slider (432) is slidably installed on the inner side of the second slide groove (431).

7. The asphalt fume purification device according to claim 6, characterized in that, The upper end of the movable rod (321) extends upward to the top of the purification tank (111). A second mounting bracket (511) is fixedly installed on the upper side of the purification tank (111). A telescopic device (512) is fixedly installed on the side of the second mounting bracket (511). A mounting seat (513) is fixedly installed on the side of the telescopic device (512). The mounting seat (513) is rotatably installed on the upper end of the movable rod (321). An external spline groove (521) is provided on the outer side of the movable rod (321). An internal spline tooth (522) is movably mounted on the external spline groove (521). A third mounting bracket (523) supporting the internal spline tooth (522) is movably mounted below the internal spline tooth (522). A fixing block (524) is fixedly mounted on the upper side of the purification tank (111). A servo motor (525) is fixedly mounted on the side of the fixing block (524). An adapter tooth (526) that meshes with the internal spline tooth (522) is fixedly mounted on the output end of the servo motor (525).

8. The asphalt fume purification device according to claim 7, characterized in that, The first adsorption chamber (311), the second adsorption chamber (312) and the third adsorption chamber (313) are all hollow flat spheres. The first adsorption chamber (311) and the second adsorption chamber (312) are connected by a circular pipe, and the second adsorption chamber (312) and the third adsorption chamber (313) are connected by a circular pipe.

9. The asphalt fume purification device according to claim 8, characterized in that, The second adsorption chamber (312) and the third adsorption chamber (313) are each provided with a fixed buffer block (331) at the center of their interiors. The buffer block (331) is spherical. The bottom sides of the two first adsorption chambers (311) are each equidistantly equipped with a first connecting rod (332). The side of the first connecting rod (332) away from the first adsorption chamber (311) is connected to the side of the second adsorption chamber (312) and the third adsorption chamber (313) respectively.

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